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Fixed MTP to work with TWRP

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awab228 2018-06-19 23:16:04 +02:00
commit f6dfaef42e
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11
arch/s390/crypto/Makefile Normal file
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#
# Cryptographic API
#
obj-$(CONFIG_CRYPTO_SHA1_S390) += sha1_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_SHA256_S390) += sha256_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_SHA512_S390) += sha512_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_DES_S390) += des_s390.o
obj-$(CONFIG_CRYPTO_AES_S390) += aes_s390.o
obj-$(CONFIG_S390_PRNG) += prng.o
obj-$(CONFIG_CRYPTO_GHASH_S390) += ghash_s390.o

985
arch/s390/crypto/aes_s390.c Normal file
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/*
* Cryptographic API.
*
* s390 implementation of the AES Cipher Algorithm.
*
* s390 Version:
* Copyright IBM Corp. 2005, 2007
* Author(s): Jan Glauber (jang@de.ibm.com)
* Sebastian Siewior (sebastian@breakpoint.cc> SW-Fallback
*
* Derived from "crypto/aes_generic.c"
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#define KMSG_COMPONENT "aes_s390"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <crypto/aes.h>
#include <crypto/algapi.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include "crypt_s390.h"
#define AES_KEYLEN_128 1
#define AES_KEYLEN_192 2
#define AES_KEYLEN_256 4
static u8 *ctrblk;
static DEFINE_SPINLOCK(ctrblk_lock);
static char keylen_flag;
struct s390_aes_ctx {
u8 key[AES_MAX_KEY_SIZE];
long enc;
long dec;
int key_len;
union {
struct crypto_blkcipher *blk;
struct crypto_cipher *cip;
} fallback;
};
struct pcc_param {
u8 key[32];
u8 tweak[16];
u8 block[16];
u8 bit[16];
u8 xts[16];
};
struct s390_xts_ctx {
u8 key[32];
u8 pcc_key[32];
long enc;
long dec;
int key_len;
struct crypto_blkcipher *fallback;
};
/*
* Check if the key_len is supported by the HW.
* Returns 0 if it is, a positive number if it is not and software fallback is
* required or a negative number in case the key size is not valid
*/
static int need_fallback(unsigned int key_len)
{
switch (key_len) {
case 16:
if (!(keylen_flag & AES_KEYLEN_128))
return 1;
break;
case 24:
if (!(keylen_flag & AES_KEYLEN_192))
return 1;
break;
case 32:
if (!(keylen_flag & AES_KEYLEN_256))
return 1;
break;
default:
return -1;
break;
}
return 0;
}
static int setkey_fallback_cip(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
int ret;
sctx->fallback.cip->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
sctx->fallback.cip->base.crt_flags |= (tfm->crt_flags &
CRYPTO_TFM_REQ_MASK);
ret = crypto_cipher_setkey(sctx->fallback.cip, in_key, key_len);
if (ret) {
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm->crt_flags |= (sctx->fallback.cip->base.crt_flags &
CRYPTO_TFM_RES_MASK);
}
return ret;
}
static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
u32 *flags = &tfm->crt_flags;
int ret;
ret = need_fallback(key_len);
if (ret < 0) {
*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
return -EINVAL;
}
sctx->key_len = key_len;
if (!ret) {
memcpy(sctx->key, in_key, key_len);
return 0;
}
return setkey_fallback_cip(tfm, in_key, key_len);
}
static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
const struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
if (unlikely(need_fallback(sctx->key_len))) {
crypto_cipher_encrypt_one(sctx->fallback.cip, out, in);
return;
}
switch (sctx->key_len) {
case 16:
crypt_s390_km(KM_AES_128_ENCRYPT, &sctx->key, out, in,
AES_BLOCK_SIZE);
break;
case 24:
crypt_s390_km(KM_AES_192_ENCRYPT, &sctx->key, out, in,
AES_BLOCK_SIZE);
break;
case 32:
crypt_s390_km(KM_AES_256_ENCRYPT, &sctx->key, out, in,
AES_BLOCK_SIZE);
break;
}
}
static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
const struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
if (unlikely(need_fallback(sctx->key_len))) {
crypto_cipher_decrypt_one(sctx->fallback.cip, out, in);
return;
}
switch (sctx->key_len) {
case 16:
crypt_s390_km(KM_AES_128_DECRYPT, &sctx->key, out, in,
AES_BLOCK_SIZE);
break;
case 24:
crypt_s390_km(KM_AES_192_DECRYPT, &sctx->key, out, in,
AES_BLOCK_SIZE);
break;
case 32:
crypt_s390_km(KM_AES_256_DECRYPT, &sctx->key, out, in,
AES_BLOCK_SIZE);
break;
}
}
static int fallback_init_cip(struct crypto_tfm *tfm)
{
const char *name = tfm->__crt_alg->cra_name;
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
sctx->fallback.cip = crypto_alloc_cipher(name, 0,
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(sctx->fallback.cip)) {
pr_err("Allocating AES fallback algorithm %s failed\n",
name);
return PTR_ERR(sctx->fallback.cip);
}
return 0;
}
static void fallback_exit_cip(struct crypto_tfm *tfm)
{
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
crypto_free_cipher(sctx->fallback.cip);
sctx->fallback.cip = NULL;
}
static struct crypto_alg aes_alg = {
.cra_name = "aes",
.cra_driver_name = "aes-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER |
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_aes_ctx),
.cra_module = THIS_MODULE,
.cra_init = fallback_init_cip,
.cra_exit = fallback_exit_cip,
.cra_u = {
.cipher = {
.cia_min_keysize = AES_MIN_KEY_SIZE,
.cia_max_keysize = AES_MAX_KEY_SIZE,
.cia_setkey = aes_set_key,
.cia_encrypt = aes_encrypt,
.cia_decrypt = aes_decrypt,
}
}
};
static int setkey_fallback_blk(struct crypto_tfm *tfm, const u8 *key,
unsigned int len)
{
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
unsigned int ret;
sctx->fallback.blk->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
sctx->fallback.blk->base.crt_flags |= (tfm->crt_flags &
CRYPTO_TFM_REQ_MASK);
ret = crypto_blkcipher_setkey(sctx->fallback.blk, key, len);
if (ret) {
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm->crt_flags |= (sctx->fallback.blk->base.crt_flags &
CRYPTO_TFM_RES_MASK);
}
return ret;
}
static int fallback_blk_dec(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
unsigned int ret;
struct crypto_blkcipher *tfm;
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
tfm = desc->tfm;
desc->tfm = sctx->fallback.blk;
ret = crypto_blkcipher_decrypt_iv(desc, dst, src, nbytes);
desc->tfm = tfm;
return ret;
}
static int fallback_blk_enc(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
unsigned int ret;
struct crypto_blkcipher *tfm;
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
tfm = desc->tfm;
desc->tfm = sctx->fallback.blk;
ret = crypto_blkcipher_encrypt_iv(desc, dst, src, nbytes);
desc->tfm = tfm;
return ret;
}
static int ecb_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
int ret;
ret = need_fallback(key_len);
if (ret > 0) {
sctx->key_len = key_len;
return setkey_fallback_blk(tfm, in_key, key_len);
}
switch (key_len) {
case 16:
sctx->enc = KM_AES_128_ENCRYPT;
sctx->dec = KM_AES_128_DECRYPT;
break;
case 24:
sctx->enc = KM_AES_192_ENCRYPT;
sctx->dec = KM_AES_192_DECRYPT;
break;
case 32:
sctx->enc = KM_AES_256_ENCRYPT;
sctx->dec = KM_AES_256_DECRYPT;
break;
}
return aes_set_key(tfm, in_key, key_len);
}
static int ecb_aes_crypt(struct blkcipher_desc *desc, long func, void *param,
struct blkcipher_walk *walk)
{
int ret = blkcipher_walk_virt(desc, walk);
unsigned int nbytes;
while ((nbytes = walk->nbytes)) {
/* only use complete blocks */
unsigned int n = nbytes & ~(AES_BLOCK_SIZE - 1);
u8 *out = walk->dst.virt.addr;
u8 *in = walk->src.virt.addr;
ret = crypt_s390_km(func, param, out, in, n);
if (ret < 0 || ret != n)
return -EIO;
nbytes &= AES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
}
return ret;
}
static int ecb_aes_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
if (unlikely(need_fallback(sctx->key_len)))
return fallback_blk_enc(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_aes_crypt(desc, sctx->enc, sctx->key, &walk);
}
static int ecb_aes_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
if (unlikely(need_fallback(sctx->key_len)))
return fallback_blk_dec(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_aes_crypt(desc, sctx->dec, sctx->key, &walk);
}
static int fallback_init_blk(struct crypto_tfm *tfm)
{
const char *name = tfm->__crt_alg->cra_name;
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
sctx->fallback.blk = crypto_alloc_blkcipher(name, 0,
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(sctx->fallback.blk)) {
pr_err("Allocating AES fallback algorithm %s failed\n",
name);
return PTR_ERR(sctx->fallback.blk);
}
return 0;
}
static void fallback_exit_blk(struct crypto_tfm *tfm)
{
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
crypto_free_blkcipher(sctx->fallback.blk);
sctx->fallback.blk = NULL;
}
static struct crypto_alg ecb_aes_alg = {
.cra_name = "ecb(aes)",
.cra_driver_name = "ecb-aes-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_aes_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = fallback_init_blk,
.cra_exit = fallback_exit_blk,
.cra_u = {
.blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = ecb_aes_set_key,
.encrypt = ecb_aes_encrypt,
.decrypt = ecb_aes_decrypt,
}
}
};
static int cbc_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
int ret;
ret = need_fallback(key_len);
if (ret > 0) {
sctx->key_len = key_len;
return setkey_fallback_blk(tfm, in_key, key_len);
}
switch (key_len) {
case 16:
sctx->enc = KMC_AES_128_ENCRYPT;
sctx->dec = KMC_AES_128_DECRYPT;
break;
case 24:
sctx->enc = KMC_AES_192_ENCRYPT;
sctx->dec = KMC_AES_192_DECRYPT;
break;
case 32:
sctx->enc = KMC_AES_256_ENCRYPT;
sctx->dec = KMC_AES_256_DECRYPT;
break;
}
return aes_set_key(tfm, in_key, key_len);
}
static int cbc_aes_crypt(struct blkcipher_desc *desc, long func,
struct blkcipher_walk *walk)
{
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
int ret = blkcipher_walk_virt(desc, walk);
unsigned int nbytes = walk->nbytes;
struct {
u8 iv[AES_BLOCK_SIZE];
u8 key[AES_MAX_KEY_SIZE];
} param;
if (!nbytes)
goto out;
memcpy(param.iv, walk->iv, AES_BLOCK_SIZE);
memcpy(param.key, sctx->key, sctx->key_len);
do {
/* only use complete blocks */
unsigned int n = nbytes & ~(AES_BLOCK_SIZE - 1);
u8 *out = walk->dst.virt.addr;
u8 *in = walk->src.virt.addr;
ret = crypt_s390_kmc(func, &param, out, in, n);
if (ret < 0 || ret != n)
return -EIO;
nbytes &= AES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
} while ((nbytes = walk->nbytes));
memcpy(walk->iv, param.iv, AES_BLOCK_SIZE);
out:
return ret;
}
static int cbc_aes_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
if (unlikely(need_fallback(sctx->key_len)))
return fallback_blk_enc(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_aes_crypt(desc, sctx->enc, &walk);
}
static int cbc_aes_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
if (unlikely(need_fallback(sctx->key_len)))
return fallback_blk_dec(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_aes_crypt(desc, sctx->dec, &walk);
}
static struct crypto_alg cbc_aes_alg = {
.cra_name = "cbc(aes)",
.cra_driver_name = "cbc-aes-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_aes_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = fallback_init_blk,
.cra_exit = fallback_exit_blk,
.cra_u = {
.blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = cbc_aes_set_key,
.encrypt = cbc_aes_encrypt,
.decrypt = cbc_aes_decrypt,
}
}
};
static int xts_fallback_setkey(struct crypto_tfm *tfm, const u8 *key,
unsigned int len)
{
struct s390_xts_ctx *xts_ctx = crypto_tfm_ctx(tfm);
unsigned int ret;
xts_ctx->fallback->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
xts_ctx->fallback->base.crt_flags |= (tfm->crt_flags &
CRYPTO_TFM_REQ_MASK);
ret = crypto_blkcipher_setkey(xts_ctx->fallback, key, len);
if (ret) {
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
tfm->crt_flags |= (xts_ctx->fallback->base.crt_flags &
CRYPTO_TFM_RES_MASK);
}
return ret;
}
static int xts_fallback_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
struct crypto_blkcipher *tfm;
unsigned int ret;
tfm = desc->tfm;
desc->tfm = xts_ctx->fallback;
ret = crypto_blkcipher_decrypt_iv(desc, dst, src, nbytes);
desc->tfm = tfm;
return ret;
}
static int xts_fallback_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
struct crypto_blkcipher *tfm;
unsigned int ret;
tfm = desc->tfm;
desc->tfm = xts_ctx->fallback;
ret = crypto_blkcipher_encrypt_iv(desc, dst, src, nbytes);
desc->tfm = tfm;
return ret;
}
static int xts_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
struct s390_xts_ctx *xts_ctx = crypto_tfm_ctx(tfm);
u32 *flags = &tfm->crt_flags;
switch (key_len) {
case 32:
xts_ctx->enc = KM_XTS_128_ENCRYPT;
xts_ctx->dec = KM_XTS_128_DECRYPT;
memcpy(xts_ctx->key + 16, in_key, 16);
memcpy(xts_ctx->pcc_key + 16, in_key + 16, 16);
break;
case 48:
xts_ctx->enc = 0;
xts_ctx->dec = 0;
xts_fallback_setkey(tfm, in_key, key_len);
break;
case 64:
xts_ctx->enc = KM_XTS_256_ENCRYPT;
xts_ctx->dec = KM_XTS_256_DECRYPT;
memcpy(xts_ctx->key, in_key, 32);
memcpy(xts_ctx->pcc_key, in_key + 32, 32);
break;
default:
*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
return -EINVAL;
}
xts_ctx->key_len = key_len;
return 0;
}
static int xts_aes_crypt(struct blkcipher_desc *desc, long func,
struct s390_xts_ctx *xts_ctx,
struct blkcipher_walk *walk)
{
unsigned int offset = (xts_ctx->key_len >> 1) & 0x10;
int ret = blkcipher_walk_virt(desc, walk);
unsigned int nbytes = walk->nbytes;
unsigned int n;
u8 *in, *out;
struct pcc_param pcc_param;
struct {
u8 key[32];
u8 init[16];
} xts_param;
if (!nbytes)
goto out;
memset(pcc_param.block, 0, sizeof(pcc_param.block));
memset(pcc_param.bit, 0, sizeof(pcc_param.bit));
memset(pcc_param.xts, 0, sizeof(pcc_param.xts));
memcpy(pcc_param.tweak, walk->iv, sizeof(pcc_param.tweak));
memcpy(pcc_param.key, xts_ctx->pcc_key, 32);
ret = crypt_s390_pcc(func, &pcc_param.key[offset]);
if (ret < 0)
return -EIO;
memcpy(xts_param.key, xts_ctx->key, 32);
memcpy(xts_param.init, pcc_param.xts, 16);
do {
/* only use complete blocks */
n = nbytes & ~(AES_BLOCK_SIZE - 1);
out = walk->dst.virt.addr;
in = walk->src.virt.addr;
ret = crypt_s390_km(func, &xts_param.key[offset], out, in, n);
if (ret < 0 || ret != n)
return -EIO;
nbytes &= AES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
} while ((nbytes = walk->nbytes));
out:
return ret;
}
static int xts_aes_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
if (unlikely(xts_ctx->key_len == 48))
return xts_fallback_encrypt(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return xts_aes_crypt(desc, xts_ctx->enc, xts_ctx, &walk);
}
static int xts_aes_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
if (unlikely(xts_ctx->key_len == 48))
return xts_fallback_decrypt(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return xts_aes_crypt(desc, xts_ctx->dec, xts_ctx, &walk);
}
static int xts_fallback_init(struct crypto_tfm *tfm)
{
const char *name = tfm->__crt_alg->cra_name;
struct s390_xts_ctx *xts_ctx = crypto_tfm_ctx(tfm);
xts_ctx->fallback = crypto_alloc_blkcipher(name, 0,
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(xts_ctx->fallback)) {
pr_err("Allocating XTS fallback algorithm %s failed\n",
name);
return PTR_ERR(xts_ctx->fallback);
}
return 0;
}
static void xts_fallback_exit(struct crypto_tfm *tfm)
{
struct s390_xts_ctx *xts_ctx = crypto_tfm_ctx(tfm);
crypto_free_blkcipher(xts_ctx->fallback);
xts_ctx->fallback = NULL;
}
static struct crypto_alg xts_aes_alg = {
.cra_name = "xts(aes)",
.cra_driver_name = "xts-aes-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_xts_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = xts_fallback_init,
.cra_exit = xts_fallback_exit,
.cra_u = {
.blkcipher = {
.min_keysize = 2 * AES_MIN_KEY_SIZE,
.max_keysize = 2 * AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = xts_aes_set_key,
.encrypt = xts_aes_encrypt,
.decrypt = xts_aes_decrypt,
}
}
};
static int xts_aes_alg_reg;
static int ctr_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
switch (key_len) {
case 16:
sctx->enc = KMCTR_AES_128_ENCRYPT;
sctx->dec = KMCTR_AES_128_DECRYPT;
break;
case 24:
sctx->enc = KMCTR_AES_192_ENCRYPT;
sctx->dec = KMCTR_AES_192_DECRYPT;
break;
case 32:
sctx->enc = KMCTR_AES_256_ENCRYPT;
sctx->dec = KMCTR_AES_256_DECRYPT;
break;
}
return aes_set_key(tfm, in_key, key_len);
}
static unsigned int __ctrblk_init(u8 *ctrptr, unsigned int nbytes)
{
unsigned int i, n;
/* only use complete blocks, max. PAGE_SIZE */
n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(AES_BLOCK_SIZE - 1);
for (i = AES_BLOCK_SIZE; i < n; i += AES_BLOCK_SIZE) {
memcpy(ctrptr + i, ctrptr + i - AES_BLOCK_SIZE,
AES_BLOCK_SIZE);
crypto_inc(ctrptr + i, AES_BLOCK_SIZE);
}
return n;
}
static int ctr_aes_crypt(struct blkcipher_desc *desc, long func,
struct s390_aes_ctx *sctx, struct blkcipher_walk *walk)
{
int ret = blkcipher_walk_virt_block(desc, walk, AES_BLOCK_SIZE);
unsigned int n, nbytes;
u8 buf[AES_BLOCK_SIZE], ctrbuf[AES_BLOCK_SIZE];
u8 *out, *in, *ctrptr = ctrbuf;
if (!walk->nbytes)
return ret;
if (spin_trylock(&ctrblk_lock))
ctrptr = ctrblk;
memcpy(ctrptr, walk->iv, AES_BLOCK_SIZE);
while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
out = walk->dst.virt.addr;
in = walk->src.virt.addr;
while (nbytes >= AES_BLOCK_SIZE) {
if (ctrptr == ctrblk)
n = __ctrblk_init(ctrptr, nbytes);
else
n = AES_BLOCK_SIZE;
ret = crypt_s390_kmctr(func, sctx->key, out, in,
n, ctrptr);
if (ret < 0 || ret != n) {
if (ctrptr == ctrblk)
spin_unlock(&ctrblk_lock);
return -EIO;
}
if (n > AES_BLOCK_SIZE)
memcpy(ctrptr, ctrptr + n - AES_BLOCK_SIZE,
AES_BLOCK_SIZE);
crypto_inc(ctrptr, AES_BLOCK_SIZE);
out += n;
in += n;
nbytes -= n;
}
ret = blkcipher_walk_done(desc, walk, nbytes);
}
if (ctrptr == ctrblk) {
if (nbytes)
memcpy(ctrbuf, ctrptr, AES_BLOCK_SIZE);
else
memcpy(walk->iv, ctrptr, AES_BLOCK_SIZE);
spin_unlock(&ctrblk_lock);
} else {
if (!nbytes)
memcpy(walk->iv, ctrptr, AES_BLOCK_SIZE);
}
/*
* final block may be < AES_BLOCK_SIZE, copy only nbytes
*/
if (nbytes) {
out = walk->dst.virt.addr;
in = walk->src.virt.addr;
ret = crypt_s390_kmctr(func, sctx->key, buf, in,
AES_BLOCK_SIZE, ctrbuf);
if (ret < 0 || ret != AES_BLOCK_SIZE)
return -EIO;
memcpy(out, buf, nbytes);
crypto_inc(ctrbuf, AES_BLOCK_SIZE);
ret = blkcipher_walk_done(desc, walk, 0);
memcpy(walk->iv, ctrbuf, AES_BLOCK_SIZE);
}
return ret;
}
static int ctr_aes_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ctr_aes_crypt(desc, sctx->enc, sctx, &walk);
}
static int ctr_aes_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ctr_aes_crypt(desc, sctx->dec, sctx, &walk);
}
static struct crypto_alg ctr_aes_alg = {
.cra_name = "ctr(aes)",
.cra_driver_name = "ctr-aes-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct s390_aes_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = ctr_aes_set_key,
.encrypt = ctr_aes_encrypt,
.decrypt = ctr_aes_decrypt,
}
}
};
static int ctr_aes_alg_reg;
static int __init aes_s390_init(void)
{
int ret;
if (crypt_s390_func_available(KM_AES_128_ENCRYPT, CRYPT_S390_MSA))
keylen_flag |= AES_KEYLEN_128;
if (crypt_s390_func_available(KM_AES_192_ENCRYPT, CRYPT_S390_MSA))
keylen_flag |= AES_KEYLEN_192;
if (crypt_s390_func_available(KM_AES_256_ENCRYPT, CRYPT_S390_MSA))
keylen_flag |= AES_KEYLEN_256;
if (!keylen_flag)
return -EOPNOTSUPP;
/* z9 109 and z9 BC/EC only support 128 bit key length */
if (keylen_flag == AES_KEYLEN_128)
pr_info("AES hardware acceleration is only available for"
" 128-bit keys\n");
ret = crypto_register_alg(&aes_alg);
if (ret)
goto aes_err;
ret = crypto_register_alg(&ecb_aes_alg);
if (ret)
goto ecb_aes_err;
ret = crypto_register_alg(&cbc_aes_alg);
if (ret)
goto cbc_aes_err;
if (crypt_s390_func_available(KM_XTS_128_ENCRYPT,
CRYPT_S390_MSA | CRYPT_S390_MSA4) &&
crypt_s390_func_available(KM_XTS_256_ENCRYPT,
CRYPT_S390_MSA | CRYPT_S390_MSA4)) {
ret = crypto_register_alg(&xts_aes_alg);
if (ret)
goto xts_aes_err;
xts_aes_alg_reg = 1;
}
if (crypt_s390_func_available(KMCTR_AES_128_ENCRYPT,
CRYPT_S390_MSA | CRYPT_S390_MSA4) &&
crypt_s390_func_available(KMCTR_AES_192_ENCRYPT,
CRYPT_S390_MSA | CRYPT_S390_MSA4) &&
crypt_s390_func_available(KMCTR_AES_256_ENCRYPT,
CRYPT_S390_MSA | CRYPT_S390_MSA4)) {
ctrblk = (u8 *) __get_free_page(GFP_KERNEL);
if (!ctrblk) {
ret = -ENOMEM;
goto ctr_aes_err;
}
ret = crypto_register_alg(&ctr_aes_alg);
if (ret) {
free_page((unsigned long) ctrblk);
goto ctr_aes_err;
}
ctr_aes_alg_reg = 1;
}
out:
return ret;
ctr_aes_err:
crypto_unregister_alg(&xts_aes_alg);
xts_aes_err:
crypto_unregister_alg(&cbc_aes_alg);
cbc_aes_err:
crypto_unregister_alg(&ecb_aes_alg);
ecb_aes_err:
crypto_unregister_alg(&aes_alg);
aes_err:
goto out;
}
static void __exit aes_s390_fini(void)
{
if (ctr_aes_alg_reg) {
crypto_unregister_alg(&ctr_aes_alg);
free_page((unsigned long) ctrblk);
}
if (xts_aes_alg_reg)
crypto_unregister_alg(&xts_aes_alg);
crypto_unregister_alg(&cbc_aes_alg);
crypto_unregister_alg(&ecb_aes_alg);
crypto_unregister_alg(&aes_alg);
}
module_init(aes_s390_init);
module_exit(aes_s390_fini);
MODULE_ALIAS_CRYPTO("aes-all");
MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm");
MODULE_LICENSE("GPL");

437
arch/s390/crypto/crypt_s390.h Normal file
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@ -0,0 +1,437 @@
/*
* Cryptographic API.
*
* Support for s390 cryptographic instructions.
*
* Copyright IBM Corp. 2003, 2007
* Author(s): Thomas Spatzier
* Jan Glauber (jan.glauber@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#ifndef _CRYPTO_ARCH_S390_CRYPT_S390_H
#define _CRYPTO_ARCH_S390_CRYPT_S390_H
#include <asm/errno.h>
#include <asm/facility.h>
#define CRYPT_S390_OP_MASK 0xFF00
#define CRYPT_S390_FUNC_MASK 0x00FF
#define CRYPT_S390_PRIORITY 300
#define CRYPT_S390_COMPOSITE_PRIORITY 400
#define CRYPT_S390_MSA 0x1
#define CRYPT_S390_MSA3 0x2
#define CRYPT_S390_MSA4 0x4
/* s390 cryptographic operations */
enum crypt_s390_operations {
CRYPT_S390_KM = 0x0100,
CRYPT_S390_KMC = 0x0200,
CRYPT_S390_KIMD = 0x0300,
CRYPT_S390_KLMD = 0x0400,
CRYPT_S390_KMAC = 0x0500,
CRYPT_S390_KMCTR = 0x0600
};
/*
* function codes for KM (CIPHER MESSAGE) instruction
* 0x80 is the decipher modifier bit
*/
enum crypt_s390_km_func {
KM_QUERY = CRYPT_S390_KM | 0x0,
KM_DEA_ENCRYPT = CRYPT_S390_KM | 0x1,
KM_DEA_DECRYPT = CRYPT_S390_KM | 0x1 | 0x80,
KM_TDEA_128_ENCRYPT = CRYPT_S390_KM | 0x2,
KM_TDEA_128_DECRYPT = CRYPT_S390_KM | 0x2 | 0x80,
KM_TDEA_192_ENCRYPT = CRYPT_S390_KM | 0x3,
KM_TDEA_192_DECRYPT = CRYPT_S390_KM | 0x3 | 0x80,
KM_AES_128_ENCRYPT = CRYPT_S390_KM | 0x12,
KM_AES_128_DECRYPT = CRYPT_S390_KM | 0x12 | 0x80,
KM_AES_192_ENCRYPT = CRYPT_S390_KM | 0x13,
KM_AES_192_DECRYPT = CRYPT_S390_KM | 0x13 | 0x80,
KM_AES_256_ENCRYPT = CRYPT_S390_KM | 0x14,
KM_AES_256_DECRYPT = CRYPT_S390_KM | 0x14 | 0x80,
KM_XTS_128_ENCRYPT = CRYPT_S390_KM | 0x32,
KM_XTS_128_DECRYPT = CRYPT_S390_KM | 0x32 | 0x80,
KM_XTS_256_ENCRYPT = CRYPT_S390_KM | 0x34,
KM_XTS_256_DECRYPT = CRYPT_S390_KM | 0x34 | 0x80,
};
/*
* function codes for KMC (CIPHER MESSAGE WITH CHAINING)
* instruction
*/
enum crypt_s390_kmc_func {
KMC_QUERY = CRYPT_S390_KMC | 0x0,
KMC_DEA_ENCRYPT = CRYPT_S390_KMC | 0x1,
KMC_DEA_DECRYPT = CRYPT_S390_KMC | 0x1 | 0x80,
KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC | 0x2,
KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC | 0x2 | 0x80,
KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC | 0x3,
KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC | 0x3 | 0x80,
KMC_AES_128_ENCRYPT = CRYPT_S390_KMC | 0x12,
KMC_AES_128_DECRYPT = CRYPT_S390_KMC | 0x12 | 0x80,
KMC_AES_192_ENCRYPT = CRYPT_S390_KMC | 0x13,
KMC_AES_192_DECRYPT = CRYPT_S390_KMC | 0x13 | 0x80,
KMC_AES_256_ENCRYPT = CRYPT_S390_KMC | 0x14,
KMC_AES_256_DECRYPT = CRYPT_S390_KMC | 0x14 | 0x80,
KMC_PRNG = CRYPT_S390_KMC | 0x43,
};
/*
* function codes for KMCTR (CIPHER MESSAGE WITH COUNTER)
* instruction
*/
enum crypt_s390_kmctr_func {
KMCTR_QUERY = CRYPT_S390_KMCTR | 0x0,
KMCTR_DEA_ENCRYPT = CRYPT_S390_KMCTR | 0x1,
KMCTR_DEA_DECRYPT = CRYPT_S390_KMCTR | 0x1 | 0x80,
KMCTR_TDEA_128_ENCRYPT = CRYPT_S390_KMCTR | 0x2,
KMCTR_TDEA_128_DECRYPT = CRYPT_S390_KMCTR | 0x2 | 0x80,
KMCTR_TDEA_192_ENCRYPT = CRYPT_S390_KMCTR | 0x3,
KMCTR_TDEA_192_DECRYPT = CRYPT_S390_KMCTR | 0x3 | 0x80,
KMCTR_AES_128_ENCRYPT = CRYPT_S390_KMCTR | 0x12,
KMCTR_AES_128_DECRYPT = CRYPT_S390_KMCTR | 0x12 | 0x80,
KMCTR_AES_192_ENCRYPT = CRYPT_S390_KMCTR | 0x13,
KMCTR_AES_192_DECRYPT = CRYPT_S390_KMCTR | 0x13 | 0x80,
KMCTR_AES_256_ENCRYPT = CRYPT_S390_KMCTR | 0x14,
KMCTR_AES_256_DECRYPT = CRYPT_S390_KMCTR | 0x14 | 0x80,
};
/*
* function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
* instruction
*/
enum crypt_s390_kimd_func {
KIMD_QUERY = CRYPT_S390_KIMD | 0,
KIMD_SHA_1 = CRYPT_S390_KIMD | 1,
KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
KIMD_SHA_512 = CRYPT_S390_KIMD | 3,
KIMD_GHASH = CRYPT_S390_KIMD | 65,
};
/*
* function codes for KLMD (COMPUTE LAST MESSAGE DIGEST)
* instruction
*/
enum crypt_s390_klmd_func {
KLMD_QUERY = CRYPT_S390_KLMD | 0,
KLMD_SHA_1 = CRYPT_S390_KLMD | 1,
KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
KLMD_SHA_512 = CRYPT_S390_KLMD | 3,
};
/*
* function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
* instruction
*/
enum crypt_s390_kmac_func {
KMAC_QUERY = CRYPT_S390_KMAC | 0,
KMAC_DEA = CRYPT_S390_KMAC | 1,
KMAC_TDEA_128 = CRYPT_S390_KMAC | 2,
KMAC_TDEA_192 = CRYPT_S390_KMAC | 3
};
/**
* crypt_s390_km:
* @func: the function code passed to KM; see crypt_s390_km_func
* @param: address of parameter block; see POP for details on each func
* @dest: address of destination memory area
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KM (CIPHER MESSAGE) operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for encryption/decryption funcs
*/
static inline int crypt_s390_km(long func, void *param,
u8 *dest, const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
register u8 *__dest asm("4") = dest;
int ret;
asm volatile(
"0: .insn rre,0xb92e0000,%3,%1 \n" /* KM opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_kmc:
* @func: the function code passed to KM; see crypt_s390_kmc_func
* @param: address of parameter block; see POP for details on each func
* @dest: address of destination memory area
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for encryption/decryption funcs
*/
static inline int crypt_s390_kmc(long func, void *param,
u8 *dest, const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
register u8 *__dest asm("4") = dest;
int ret;
asm volatile(
"0: .insn rre,0xb92f0000,%3,%1 \n" /* KMC opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_kimd:
* @func: the function code passed to KM; see crypt_s390_kimd_func
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
* of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for digest funcs
*/
static inline int crypt_s390_kimd(long func, void *param,
const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
int ret;
asm volatile(
"0: .insn rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_klmd:
* @func: the function code passed to KM; see crypt_s390_klmd_func
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for digest funcs
*/
static inline int crypt_s390_klmd(long func, void *param,
const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
int ret;
asm volatile(
"0: .insn rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_kmac:
* @func: the function code passed to KM; see crypt_s390_klmd_func
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
* of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for digest funcs
*/
static inline int crypt_s390_kmac(long func, void *param,
const u8 *src, long src_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
int ret;
asm volatile(
"0: .insn rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_kmctr:
* @func: the function code passed to KMCTR; see crypt_s390_kmctr_func
* @param: address of parameter block; see POP for details on each func
* @dest: address of destination memory area
* @src: address of source memory area
* @src_len: length of src operand in bytes
* @counter: address of counter value
*
* Executes the KMCTR (CIPHER MESSAGE WITH COUNTER) operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of processed
* bytes for encryption/decryption funcs
*/
static inline int crypt_s390_kmctr(long func, void *param, u8 *dest,
const u8 *src, long src_len, u8 *counter)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param;
register const u8 *__src asm("2") = src;
register long __src_len asm("3") = src_len;
register u8 *__dest asm("4") = dest;
register u8 *__ctr asm("6") = counter;
int ret = -1;
asm volatile(
"0: .insn rrf,0xb92d0000,%3,%1,%4,0 \n" /* KMCTR opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "+d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest),
"+a" (__ctr)
: "d" (__func), "a" (__param) : "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}
/**
* crypt_s390_func_available:
* @func: the function code of the specific function; 0 if op in general
*
* Tests if a specific crypto function is implemented on the machine.
*
* Returns 1 if func available; 0 if func or op in general not available
*/
static inline int crypt_s390_func_available(int func,
unsigned int facility_mask)
{
unsigned char status[16];
int ret;
if (facility_mask & CRYPT_S390_MSA && !test_facility(17))
return 0;
if (facility_mask & CRYPT_S390_MSA3 &&
(!test_facility(2) || !test_facility(76)))
return 0;
if (facility_mask & CRYPT_S390_MSA4 &&
(!test_facility(2) || !test_facility(77)))
return 0;
switch (func & CRYPT_S390_OP_MASK) {
case CRYPT_S390_KM:
ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
break;
case CRYPT_S390_KMC:
ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0);
break;
case CRYPT_S390_KIMD:
ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0);
break;
case CRYPT_S390_KLMD:
ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0);
break;
case CRYPT_S390_KMAC:
ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
break;
case CRYPT_S390_KMCTR:
ret = crypt_s390_kmctr(KMCTR_QUERY, &status, NULL, NULL, 0,
NULL);
break;
default:
return 0;
}
if (ret < 0)
return 0;
func &= CRYPT_S390_FUNC_MASK;
func &= 0x7f; /* mask modifier bit */
return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
}
/**
* crypt_s390_pcc:
* @func: the function code passed to KM; see crypt_s390_km_func
* @param: address of parameter block; see POP for details on each func
*
* Executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION) operation of the CPU.
*
* Returns -1 for failure, 0 for success.
*/
static inline int crypt_s390_pcc(long func, void *param)
{
register long __func asm("0") = func & 0x7f; /* encrypt or decrypt */
register void *__param asm("1") = param;
int ret = -1;
asm volatile(
"0: .insn rre,0xb92c0000,0,0 \n" /* PCC opcode */
"1: brc 1,0b \n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
: "+d" (ret)
: "d" (__func), "a" (__param) : "cc", "memory");
return ret;
}
#endif /* _CRYPTO_ARCH_S390_CRYPT_S390_H */

626
arch/s390/crypto/des_s390.c Normal file
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@ -0,0 +1,626 @@
/*
* Cryptographic API.
*
* s390 implementation of the DES Cipher Algorithm.
*
* Copyright IBM Corp. 2003, 2011
* Author(s): Thomas Spatzier
* Jan Glauber (jan.glauber@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <crypto/des.h>
#include "crypt_s390.h"
#define DES3_KEY_SIZE (3 * DES_KEY_SIZE)
static u8 *ctrblk;
static DEFINE_SPINLOCK(ctrblk_lock);
struct s390_des_ctx {
u8 iv[DES_BLOCK_SIZE];
u8 key[DES3_KEY_SIZE];
};
static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
unsigned int key_len)
{
struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
u32 *flags = &tfm->crt_flags;
u32 tmp[DES_EXPKEY_WORDS];
/* check for weak keys */
if (!des_ekey(tmp, key) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
*flags |= CRYPTO_TFM_RES_WEAK_KEY;
return -EINVAL;
}
memcpy(ctx->key, key, key_len);
return 0;
}
static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
crypt_s390_km(KM_DEA_ENCRYPT, ctx->key, out, in, DES_BLOCK_SIZE);
}
static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
crypt_s390_km(KM_DEA_DECRYPT, ctx->key, out, in, DES_BLOCK_SIZE);
}
static struct crypto_alg des_alg = {
.cra_name = "des",
.cra_driver_name = "des-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_module = THIS_MODULE,
.cra_u = {
.cipher = {
.cia_min_keysize = DES_KEY_SIZE,
.cia_max_keysize = DES_KEY_SIZE,
.cia_setkey = des_setkey,
.cia_encrypt = des_encrypt,
.cia_decrypt = des_decrypt,
}
}
};
static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
u8 *key, struct blkcipher_walk *walk)
{
int ret = blkcipher_walk_virt(desc, walk);
unsigned int nbytes;
while ((nbytes = walk->nbytes)) {
/* only use complete blocks */
unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
u8 *out = walk->dst.virt.addr;
u8 *in = walk->src.virt.addr;
ret = crypt_s390_km(func, key, out, in, n);
if (ret < 0 || ret != n)
return -EIO;
nbytes &= DES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
}
return ret;
}
static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
struct blkcipher_walk *walk)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
int ret = blkcipher_walk_virt(desc, walk);
unsigned int nbytes = walk->nbytes;
struct {
u8 iv[DES_BLOCK_SIZE];
u8 key[DES3_KEY_SIZE];
} param;
if (!nbytes)
goto out;
memcpy(param.iv, walk->iv, DES_BLOCK_SIZE);
memcpy(param.key, ctx->key, DES3_KEY_SIZE);
do {
/* only use complete blocks */
unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
u8 *out = walk->dst.virt.addr;
u8 *in = walk->src.virt.addr;
ret = crypt_s390_kmc(func, &param, out, in, n);
if (ret < 0 || ret != n)
return -EIO;
nbytes &= DES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
} while ((nbytes = walk->nbytes));
memcpy(walk->iv, param.iv, DES_BLOCK_SIZE);
out:
return ret;
}
static int ecb_des_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_desall_crypt(desc, KM_DEA_ENCRYPT, ctx->key, &walk);
}
static int ecb_des_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_desall_crypt(desc, KM_DEA_DECRYPT, ctx->key, &walk);
}
static struct crypto_alg ecb_des_alg = {
.cra_name = "ecb(des)",
.cra_driver_name = "ecb-des-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.setkey = des_setkey,
.encrypt = ecb_des_encrypt,
.decrypt = ecb_des_decrypt,
}
}
};
static int cbc_des_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, &walk);
}
static int cbc_des_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, &walk);
}
static struct crypto_alg cbc_des_alg = {
.cra_name = "cbc(des)",
.cra_driver_name = "cbc-des-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
.setkey = des_setkey,
.encrypt = cbc_des_encrypt,
.decrypt = cbc_des_decrypt,
}
}
};
/*
* RFC2451:
*
* For DES-EDE3, there is no known need to reject weak or
* complementation keys. Any weakness is obviated by the use of
* multiple keys.
*
* However, if the first two or last two independent 64-bit keys are
* equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
* same as DES. Implementers MUST reject keys that exhibit this
* property.
*
*/
static int des3_setkey(struct crypto_tfm *tfm, const u8 *key,
unsigned int key_len)
{
struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
u32 *flags = &tfm->crt_flags;
if (!(crypto_memneq(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) &&
crypto_memneq(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2],
DES_KEY_SIZE)) &&
(*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
*flags |= CRYPTO_TFM_RES_WEAK_KEY;
return -EINVAL;
}
memcpy(ctx->key, key, key_len);
return 0;
}
static void des3_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
crypt_s390_km(KM_TDEA_192_ENCRYPT, ctx->key, dst, src, DES_BLOCK_SIZE);
}
static void des3_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
crypt_s390_km(KM_TDEA_192_DECRYPT, ctx->key, dst, src, DES_BLOCK_SIZE);
}
static struct crypto_alg des3_alg = {
.cra_name = "des3_ede",
.cra_driver_name = "des3_ede-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_module = THIS_MODULE,
.cra_u = {
.cipher = {
.cia_min_keysize = DES3_KEY_SIZE,
.cia_max_keysize = DES3_KEY_SIZE,
.cia_setkey = des3_setkey,
.cia_encrypt = des3_encrypt,
.cia_decrypt = des3_decrypt,
}
}
};
static int ecb_des3_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_desall_crypt(desc, KM_TDEA_192_ENCRYPT, ctx->key, &walk);
}
static int ecb_des3_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_desall_crypt(desc, KM_TDEA_192_DECRYPT, ctx->key, &walk);
}
static struct crypto_alg ecb_des3_alg = {
.cra_name = "ecb(des3_ede)",
.cra_driver_name = "ecb-des3_ede-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = DES3_KEY_SIZE,
.max_keysize = DES3_KEY_SIZE,
.setkey = des3_setkey,
.encrypt = ecb_des3_encrypt,
.decrypt = ecb_des3_decrypt,
}
}
};
static int cbc_des3_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, &walk);
}
static int cbc_des3_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, &walk);
}
static struct crypto_alg cbc_des3_alg = {
.cra_name = "cbc(des3_ede)",
.cra_driver_name = "cbc-des3_ede-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = DES3_KEY_SIZE,
.max_keysize = DES3_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
.setkey = des3_setkey,
.encrypt = cbc_des3_encrypt,
.decrypt = cbc_des3_decrypt,
}
}
};
static unsigned int __ctrblk_init(u8 *ctrptr, unsigned int nbytes)
{
unsigned int i, n;
/* align to block size, max. PAGE_SIZE */
n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(DES_BLOCK_SIZE - 1);
for (i = DES_BLOCK_SIZE; i < n; i += DES_BLOCK_SIZE) {
memcpy(ctrptr + i, ctrptr + i - DES_BLOCK_SIZE, DES_BLOCK_SIZE);
crypto_inc(ctrptr + i, DES_BLOCK_SIZE);
}
return n;
}
static int ctr_desall_crypt(struct blkcipher_desc *desc, long func,
struct s390_des_ctx *ctx,
struct blkcipher_walk *walk)
{
int ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE);
unsigned int n, nbytes;
u8 buf[DES_BLOCK_SIZE], ctrbuf[DES_BLOCK_SIZE];
u8 *out, *in, *ctrptr = ctrbuf;
if (!walk->nbytes)
return ret;
if (spin_trylock(&ctrblk_lock))
ctrptr = ctrblk;
memcpy(ctrptr, walk->iv, DES_BLOCK_SIZE);
while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
out = walk->dst.virt.addr;
in = walk->src.virt.addr;
while (nbytes >= DES_BLOCK_SIZE) {
if (ctrptr == ctrblk)
n = __ctrblk_init(ctrptr, nbytes);
else
n = DES_BLOCK_SIZE;
ret = crypt_s390_kmctr(func, ctx->key, out, in,
n, ctrptr);
if (ret < 0 || ret != n) {
if (ctrptr == ctrblk)
spin_unlock(&ctrblk_lock);
return -EIO;
}
if (n > DES_BLOCK_SIZE)
memcpy(ctrptr, ctrptr + n - DES_BLOCK_SIZE,
DES_BLOCK_SIZE);
crypto_inc(ctrptr, DES_BLOCK_SIZE);
out += n;
in += n;
nbytes -= n;
}
ret = blkcipher_walk_done(desc, walk, nbytes);
}
if (ctrptr == ctrblk) {
if (nbytes)
memcpy(ctrbuf, ctrptr, DES_BLOCK_SIZE);
else
memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE);
spin_unlock(&ctrblk_lock);
} else {
if (!nbytes)
memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE);
}
/* final block may be < DES_BLOCK_SIZE, copy only nbytes */
if (nbytes) {
out = walk->dst.virt.addr;
in = walk->src.virt.addr;
ret = crypt_s390_kmctr(func, ctx->key, buf, in,
DES_BLOCK_SIZE, ctrbuf);
if (ret < 0 || ret != DES_BLOCK_SIZE)
return -EIO;
memcpy(out, buf, nbytes);
crypto_inc(ctrbuf, DES_BLOCK_SIZE);
ret = blkcipher_walk_done(desc, walk, 0);
memcpy(walk->iv, ctrbuf, DES_BLOCK_SIZE);
}
return ret;
}
static int ctr_des_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ctr_desall_crypt(desc, KMCTR_DEA_ENCRYPT, ctx, &walk);
}
static int ctr_des_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ctr_desall_crypt(desc, KMCTR_DEA_DECRYPT, ctx, &walk);
}
static struct crypto_alg ctr_des_alg = {
.cra_name = "ctr(des)",
.cra_driver_name = "ctr-des-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
.setkey = des_setkey,
.encrypt = ctr_des_encrypt,
.decrypt = ctr_des_decrypt,
}
}
};
static int ctr_des3_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ctr_desall_crypt(desc, KMCTR_TDEA_192_ENCRYPT, ctx, &walk);
}
static int ctr_des3_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ctr_desall_crypt(desc, KMCTR_TDEA_192_DECRYPT, ctx, &walk);
}
static struct crypto_alg ctr_des3_alg = {
.cra_name = "ctr(des3_ede)",
.cra_driver_name = "ctr-des3_ede-s390",
.cra_priority = CRYPT_S390_COMPOSITE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct s390_des_ctx),
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_u = {
.blkcipher = {
.min_keysize = DES3_KEY_SIZE,
.max_keysize = DES3_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
.setkey = des3_setkey,
.encrypt = ctr_des3_encrypt,
.decrypt = ctr_des3_decrypt,
}
}
};
static int __init des_s390_init(void)
{
int ret;
if (!crypt_s390_func_available(KM_DEA_ENCRYPT, CRYPT_S390_MSA) ||
!crypt_s390_func_available(KM_TDEA_192_ENCRYPT, CRYPT_S390_MSA))
return -EOPNOTSUPP;
ret = crypto_register_alg(&des_alg);
if (ret)
goto des_err;
ret = crypto_register_alg(&ecb_des_alg);
if (ret)
goto ecb_des_err;
ret = crypto_register_alg(&cbc_des_alg);
if (ret)
goto cbc_des_err;
ret = crypto_register_alg(&des3_alg);
if (ret)
goto des3_err;
ret = crypto_register_alg(&ecb_des3_alg);
if (ret)
goto ecb_des3_err;
ret = crypto_register_alg(&cbc_des3_alg);
if (ret)
goto cbc_des3_err;
if (crypt_s390_func_available(KMCTR_DEA_ENCRYPT,
CRYPT_S390_MSA | CRYPT_S390_MSA4) &&
crypt_s390_func_available(KMCTR_TDEA_192_ENCRYPT,
CRYPT_S390_MSA | CRYPT_S390_MSA4)) {
ret = crypto_register_alg(&ctr_des_alg);
if (ret)
goto ctr_des_err;
ret = crypto_register_alg(&ctr_des3_alg);
if (ret)
goto ctr_des3_err;
ctrblk = (u8 *) __get_free_page(GFP_KERNEL);
if (!ctrblk) {
ret = -ENOMEM;
goto ctr_mem_err;
}
}
out:
return ret;
ctr_mem_err:
crypto_unregister_alg(&ctr_des3_alg);
ctr_des3_err:
crypto_unregister_alg(&ctr_des_alg);
ctr_des_err:
crypto_unregister_alg(&cbc_des3_alg);
cbc_des3_err:
crypto_unregister_alg(&ecb_des3_alg);
ecb_des3_err:
crypto_unregister_alg(&des3_alg);
des3_err:
crypto_unregister_alg(&cbc_des_alg);
cbc_des_err:
crypto_unregister_alg(&ecb_des_alg);
ecb_des_err:
crypto_unregister_alg(&des_alg);
des_err:
goto out;
}
static void __exit des_s390_exit(void)
{
if (ctrblk) {
crypto_unregister_alg(&ctr_des_alg);
crypto_unregister_alg(&ctr_des3_alg);
free_page((unsigned long) ctrblk);
}
crypto_unregister_alg(&cbc_des3_alg);
crypto_unregister_alg(&ecb_des3_alg);
crypto_unregister_alg(&des3_alg);
crypto_unregister_alg(&cbc_des_alg);
crypto_unregister_alg(&ecb_des_alg);
crypto_unregister_alg(&des_alg);
}
module_init(des_s390_init);
module_exit(des_s390_exit);
MODULE_ALIAS_CRYPTO("des");
MODULE_ALIAS_CRYPTO("des3_ede");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");

166
arch/s390/crypto/ghash_s390.c Normal file
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@ -0,0 +1,166 @@
/*
* Cryptographic API.
*
* s390 implementation of the GHASH algorithm for GCM (Galois/Counter Mode).
*
* Copyright IBM Corp. 2011
* Author(s): Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
#include <crypto/internal/hash.h>
#include <linux/module.h>
#include "crypt_s390.h"
#define GHASH_BLOCK_SIZE 16
#define GHASH_DIGEST_SIZE 16
struct ghash_ctx {
u8 icv[16];
u8 key[16];
};
struct ghash_desc_ctx {
u8 buffer[GHASH_BLOCK_SIZE];
u32 bytes;
};
static int ghash_init(struct shash_desc *desc)
{
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
memset(dctx, 0, sizeof(*dctx));
return 0;
}
static int ghash_setkey(struct crypto_shash *tfm,
const u8 *key, unsigned int keylen)
{
struct ghash_ctx *ctx = crypto_shash_ctx(tfm);
if (keylen != GHASH_BLOCK_SIZE) {
crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
memcpy(ctx->key, key, GHASH_BLOCK_SIZE);
memset(ctx->icv, 0, GHASH_BLOCK_SIZE);
return 0;
}
static int ghash_update(struct shash_desc *desc,
const u8 *src, unsigned int srclen)
{
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
unsigned int n;
u8 *buf = dctx->buffer;
int ret;
if (dctx->bytes) {
u8 *pos = buf + (GHASH_BLOCK_SIZE - dctx->bytes);
n = min(srclen, dctx->bytes);
dctx->bytes -= n;
srclen -= n;
memcpy(pos, src, n);
src += n;
if (!dctx->bytes) {
ret = crypt_s390_kimd(KIMD_GHASH, ctx, buf,
GHASH_BLOCK_SIZE);
if (ret != GHASH_BLOCK_SIZE)
return -EIO;
}
}
n = srclen & ~(GHASH_BLOCK_SIZE - 1);
if (n) {
ret = crypt_s390_kimd(KIMD_GHASH, ctx, src, n);
if (ret != n)
return -EIO;
src += n;
srclen -= n;
}
if (srclen) {
dctx->bytes = GHASH_BLOCK_SIZE - srclen;
memcpy(buf, src, srclen);
}
return 0;
}
static int ghash_flush(struct ghash_ctx *ctx, struct ghash_desc_ctx *dctx)
{
u8 *buf = dctx->buffer;
int ret;
if (dctx->bytes) {
u8 *pos = buf + (GHASH_BLOCK_SIZE - dctx->bytes);
memset(pos, 0, dctx->bytes);
ret = crypt_s390_kimd(KIMD_GHASH, ctx, buf, GHASH_BLOCK_SIZE);
if (ret != GHASH_BLOCK_SIZE)
return -EIO;
}
dctx->bytes = 0;
return 0;
}
static int ghash_final(struct shash_desc *desc, u8 *dst)
{
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
int ret;
ret = ghash_flush(ctx, dctx);
if (!ret)
memcpy(dst, ctx->icv, GHASH_BLOCK_SIZE);
return ret;
}
static struct shash_alg ghash_alg = {
.digestsize = GHASH_DIGEST_SIZE,
.init = ghash_init,
.update = ghash_update,
.final = ghash_final,
.setkey = ghash_setkey,
.descsize = sizeof(struct ghash_desc_ctx),
.base = {
.cra_name = "ghash",
.cra_driver_name = "ghash-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = GHASH_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct ghash_ctx),
.cra_module = THIS_MODULE,
},
};
static int __init ghash_mod_init(void)
{
if (!crypt_s390_func_available(KIMD_GHASH,
CRYPT_S390_MSA | CRYPT_S390_MSA4))
return -EOPNOTSUPP;
return crypto_register_shash(&ghash_alg);
}
static void __exit ghash_mod_exit(void)
{
crypto_unregister_shash(&ghash_alg);
}
module_init(ghash_mod_init);
module_exit(ghash_mod_exit);
MODULE_ALIAS_CRYPTO("ghash");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("GHASH Message Digest Algorithm, s390 implementation");

211
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/*
* Copyright IBM Corp. 2006, 2007
* Author(s): Jan Glauber <jan.glauber@de.ibm.com>
* Driver for the s390 pseudo random number generator
*/
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <asm/debug.h>
#include <asm/uaccess.h>
#include "crypt_s390.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jan Glauber <jan.glauber@de.ibm.com>");
MODULE_DESCRIPTION("s390 PRNG interface");
static int prng_chunk_size = 256;
module_param(prng_chunk_size, int, S_IRUSR | S_IRGRP | S_IROTH);
MODULE_PARM_DESC(prng_chunk_size, "PRNG read chunk size in bytes");
static int prng_entropy_limit = 4096;
module_param(prng_entropy_limit, int, S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR);
MODULE_PARM_DESC(prng_entropy_limit,
"PRNG add entropy after that much bytes were produced");
/*
* Any one who considers arithmetical methods of producing random digits is,
* of course, in a state of sin. -- John von Neumann
*/
struct s390_prng_data {
unsigned long count; /* how many bytes were produced */
char *buf;
};
static struct s390_prng_data *p;
/* copied from libica, use a non-zero initial parameter block */
static unsigned char parm_block[32] = {
0x0F,0x2B,0x8E,0x63,0x8C,0x8E,0xD2,0x52,0x64,0xB7,0xA0,0x7B,0x75,0x28,0xB8,0xF4,
0x75,0x5F,0xD2,0xA6,0x8D,0x97,0x11,0xFF,0x49,0xD8,0x23,0xF3,0x7E,0x21,0xEC,0xA0,
};
static int prng_open(struct inode *inode, struct file *file)
{
return nonseekable_open(inode, file);
}
static void prng_add_entropy(void)
{
__u64 entropy[4];
unsigned int i;
int ret;
for (i = 0; i < 16; i++) {
ret = crypt_s390_kmc(KMC_PRNG, parm_block, (char *)entropy,
(char *)entropy, sizeof(entropy));
BUG_ON(ret < 0 || ret != sizeof(entropy));
memcpy(parm_block, entropy, sizeof(entropy));
}
}
static void prng_seed(int nbytes)
{
char buf[16];
int i = 0;
BUG_ON(nbytes > 16);
get_random_bytes(buf, nbytes);
/* Add the entropy */
while (nbytes >= 8) {
*((__u64 *)parm_block) ^= *((__u64 *)(buf+i));
prng_add_entropy();
i += 8;
nbytes -= 8;
}
prng_add_entropy();
}
static ssize_t prng_read(struct file *file, char __user *ubuf, size_t nbytes,
loff_t *ppos)
{
int chunk, n;
int ret = 0;
int tmp;
/* nbytes can be arbitrary length, we split it into chunks */
while (nbytes) {
/* same as in extract_entropy_user in random.c */
if (need_resched()) {
if (signal_pending(current)) {
if (ret == 0)
ret = -ERESTARTSYS;
break;
}
schedule();
}
/*
* we lose some random bytes if an attacker issues
* reads < 8 bytes, but we don't care
*/
chunk = min_t(int, nbytes, prng_chunk_size);
/* PRNG only likes multiples of 8 bytes */
n = (chunk + 7) & -8;
if (p->count > prng_entropy_limit)
prng_seed(8);
/* if the CPU supports PRNG stckf is present too */
asm volatile(".insn s,0xb27c0000,%0"
: "=m" (*((unsigned long long *)p->buf)) : : "cc");
/*
* Beside the STCKF the input for the TDES-EDE is the output
* of the last operation. We differ here from X9.17 since we
* only store one timestamp into the buffer. Padding the whole
* buffer with timestamps does not improve security, since
* successive stckf have nearly constant offsets.
* If an attacker knows the first timestamp it would be
* trivial to guess the additional values. One timestamp
* is therefore enough and still guarantees unique input values.
*
* Note: you can still get strict X9.17 conformity by setting
* prng_chunk_size to 8 bytes.
*/
tmp = crypt_s390_kmc(KMC_PRNG, parm_block, p->buf, p->buf, n);
BUG_ON((tmp < 0) || (tmp != n));
p->count += n;
if (copy_to_user(ubuf, p->buf, chunk))
return -EFAULT;
nbytes -= chunk;
ret += chunk;
ubuf += chunk;
}
return ret;
}
static const struct file_operations prng_fops = {
.owner = THIS_MODULE,
.open = &prng_open,
.release = NULL,
.read = &prng_read,
.llseek = noop_llseek,
};
static struct miscdevice prng_dev = {
.name = "prandom",
.minor = MISC_DYNAMIC_MINOR,
.fops = &prng_fops,
};
static int __init prng_init(void)
{
int ret;
/* check if the CPU has a PRNG */
if (!crypt_s390_func_available(KMC_PRNG, CRYPT_S390_MSA))
return -EOPNOTSUPP;
if (prng_chunk_size < 8)
return -EINVAL;
p = kmalloc(sizeof(struct s390_prng_data), GFP_KERNEL);
if (!p)
return -ENOMEM;
p->count = 0;
p->buf = kmalloc(prng_chunk_size, GFP_KERNEL);
if (!p->buf) {
ret = -ENOMEM;
goto out_free;
}
/* initialize the PRNG, add 128 bits of entropy */
prng_seed(16);
ret = misc_register(&prng_dev);
if (ret)
goto out_buf;
return 0;
out_buf:
kfree(p->buf);
out_free:
kfree(p);
return ret;
}
static void __exit prng_exit(void)
{
/* wipe me */
kzfree(p->buf);
kfree(p);
misc_deregister(&prng_dev);
}
module_init(prng_init);
module_exit(prng_exit);

37
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/*
* Cryptographic API.
*
* s390 generic implementation of the SHA Secure Hash Algorithms.
*
* Copyright IBM Corp. 2007
* Author(s): Jan Glauber (jang@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#ifndef _CRYPTO_ARCH_S390_SHA_H
#define _CRYPTO_ARCH_S390_SHA_H
#include <linux/crypto.h>
#include <crypto/sha.h>
/* must be big enough for the largest SHA variant */
#define SHA_MAX_STATE_SIZE 16
#define SHA_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE
struct s390_sha_ctx {
u64 count; /* message length in bytes */
u32 state[SHA_MAX_STATE_SIZE];
u8 buf[2 * SHA_MAX_BLOCK_SIZE];
int func; /* KIMD function to use */
};
struct shash_desc;
int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len);
int s390_sha_final(struct shash_desc *desc, u8 *out);
#endif

108
arch/s390/crypto/sha1_s390.c Normal file
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/*
* Cryptographic API.
*
* s390 implementation of the SHA1 Secure Hash Algorithm.
*
* Derived from cryptoapi implementation, adapted for in-place
* scatterlist interface. Originally based on the public domain
* implementation written by Steve Reid.
*
* s390 Version:
* Copyright IBM Corp. 2003, 2007
* Author(s): Thomas Spatzier
* Jan Glauber (jan.glauber@de.ibm.com)
*
* Derived from "crypto/sha1_generic.c"
* Copyright (c) Alan Smithee.
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <crypto/sha.h>
#include "crypt_s390.h"
#include "sha.h"
static int sha1_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
sctx->state[0] = SHA1_H0;
sctx->state[1] = SHA1_H1;
sctx->state[2] = SHA1_H2;
sctx->state[3] = SHA1_H3;
sctx->state[4] = SHA1_H4;
sctx->count = 0;
sctx->func = KIMD_SHA_1;
return 0;
}
static int sha1_export(struct shash_desc *desc, void *out)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
struct sha1_state *octx = out;
octx->count = sctx->count;
memcpy(octx->state, sctx->state, sizeof(octx->state));
memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
return 0;
}
static int sha1_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha1_state *ictx = in;
sctx->count = ictx->count;
memcpy(sctx->state, ictx->state, sizeof(ictx->state));
memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
sctx->func = KIMD_SHA_1;
return 0;
}
static struct shash_alg alg = {
.digestsize = SHA1_DIGEST_SIZE,
.init = sha1_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha1_export,
.import = sha1_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha1_state),
.base = {
.cra_name = "sha1",
.cra_driver_name= "sha1-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sha1_s390_init(void)
{
if (!crypt_s390_func_available(KIMD_SHA_1, CRYPT_S390_MSA))
return -EOPNOTSUPP;
return crypto_register_shash(&alg);
}
static void __exit sha1_s390_fini(void)
{
crypto_unregister_shash(&alg);
}
module_init(sha1_s390_init);
module_exit(sha1_s390_fini);
MODULE_ALIAS_CRYPTO("sha1");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");

149
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/*
* Cryptographic API.
*
* s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
*
* s390 Version:
* Copyright IBM Corp. 2005, 2011
* Author(s): Jan Glauber (jang@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <crypto/sha.h>
#include "crypt_s390.h"
#include "sha.h"
static int sha256_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
sctx->state[0] = SHA256_H0;
sctx->state[1] = SHA256_H1;
sctx->state[2] = SHA256_H2;
sctx->state[3] = SHA256_H3;
sctx->state[4] = SHA256_H4;
sctx->state[5] = SHA256_H5;
sctx->state[6] = SHA256_H6;
sctx->state[7] = SHA256_H7;
sctx->count = 0;
sctx->func = KIMD_SHA_256;
return 0;
}
static int sha256_export(struct shash_desc *desc, void *out)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
struct sha256_state *octx = out;
octx->count = sctx->count;
memcpy(octx->state, sctx->state, sizeof(octx->state));
memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
return 0;
}
static int sha256_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha256_state *ictx = in;
sctx->count = ictx->count;
memcpy(sctx->state, ictx->state, sizeof(ictx->state));
memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
sctx->func = KIMD_SHA_256;
return 0;
}
static struct shash_alg sha256_alg = {
.digestsize = SHA256_DIGEST_SIZE,
.init = sha256_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha256_export,
.import = sha256_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha256_state),
.base = {
.cra_name = "sha256",
.cra_driver_name= "sha256-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA256_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int sha224_init(struct shash_desc *desc)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
sctx->state[0] = SHA224_H0;
sctx->state[1] = SHA224_H1;
sctx->state[2] = SHA224_H2;
sctx->state[3] = SHA224_H3;
sctx->state[4] = SHA224_H4;
sctx->state[5] = SHA224_H5;
sctx->state[6] = SHA224_H6;
sctx->state[7] = SHA224_H7;
sctx->count = 0;
sctx->func = KIMD_SHA_256;
return 0;
}
static struct shash_alg sha224_alg = {
.digestsize = SHA224_DIGEST_SIZE,
.init = sha224_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha256_export,
.import = sha256_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha256_state),
.base = {
.cra_name = "sha224",
.cra_driver_name= "sha224-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sha256_s390_init(void)
{
int ret;
if (!crypt_s390_func_available(KIMD_SHA_256, CRYPT_S390_MSA))
return -EOPNOTSUPP;
ret = crypto_register_shash(&sha256_alg);
if (ret < 0)
goto out;
ret = crypto_register_shash(&sha224_alg);
if (ret < 0)
crypto_unregister_shash(&sha256_alg);
out:
return ret;
}
static void __exit sha256_s390_fini(void)
{
crypto_unregister_shash(&sha224_alg);
crypto_unregister_shash(&sha256_alg);
}
module_init(sha256_s390_init);
module_exit(sha256_s390_fini);
MODULE_ALIAS_CRYPTO("sha256");
MODULE_ALIAS_CRYPTO("sha224");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");

155
arch/s390/crypto/sha512_s390.c Normal file
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/*
* Cryptographic API.
*
* s390 implementation of the SHA512 and SHA38 Secure Hash Algorithm.
*
* Copyright IBM Corp. 2007
* Author(s): Jan Glauber (jang@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "sha.h"
#include "crypt_s390.h"
static int sha512_init(struct shash_desc *desc)
{
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
*(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
*(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
*(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
*(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
*(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
*(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
*(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
*(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
ctx->count = 0;
ctx->func = KIMD_SHA_512;
return 0;
}
static int sha512_export(struct shash_desc *desc, void *out)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
struct sha512_state *octx = out;
octx->count[0] = sctx->count;
octx->count[1] = 0;
memcpy(octx->state, sctx->state, sizeof(octx->state));
memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
return 0;
}
static int sha512_import(struct shash_desc *desc, const void *in)
{
struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
const struct sha512_state *ictx = in;
if (unlikely(ictx->count[1]))
return -ERANGE;
sctx->count = ictx->count[0];
memcpy(sctx->state, ictx->state, sizeof(ictx->state));
memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
sctx->func = KIMD_SHA_512;
return 0;
}
static struct shash_alg sha512_alg = {
.digestsize = SHA512_DIGEST_SIZE,
.init = sha512_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha512_export,
.import = sha512_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha512_state),
.base = {
.cra_name = "sha512",
.cra_driver_name= "sha512-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA512_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
MODULE_ALIAS_CRYPTO("sha512");
static int sha384_init(struct shash_desc *desc)
{
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
*(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL;
*(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL;
*(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL;
*(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL;
*(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL;
*(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL;
*(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL;
*(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL;
ctx->count = 0;
ctx->func = KIMD_SHA_512;
return 0;
}
static struct shash_alg sha384_alg = {
.digestsize = SHA384_DIGEST_SIZE,
.init = sha384_init,
.update = s390_sha_update,
.final = s390_sha_final,
.export = sha512_export,
.import = sha512_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha512_state),
.base = {
.cra_name = "sha384",
.cra_driver_name= "sha384-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SHA384_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct s390_sha_ctx),
.cra_module = THIS_MODULE,
}
};
MODULE_ALIAS_CRYPTO("sha384");
static int __init init(void)
{
int ret;
if (!crypt_s390_func_available(KIMD_SHA_512, CRYPT_S390_MSA))
return -EOPNOTSUPP;
if ((ret = crypto_register_shash(&sha512_alg)) < 0)
goto out;
if ((ret = crypto_register_shash(&sha384_alg)) < 0)
crypto_unregister_shash(&sha512_alg);
out:
return ret;
}
static void __exit fini(void)
{
crypto_unregister_shash(&sha512_alg);
crypto_unregister_shash(&sha384_alg);
}
module_init(init);
module_exit(fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");

106
arch/s390/crypto/sha_common.c Normal file
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/*
* Cryptographic API.
*
* s390 generic implementation of the SHA Secure Hash Algorithms.
*
* Copyright IBM Corp. 2007
* Author(s): Jan Glauber (jang@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <crypto/internal/hash.h>
#include <linux/module.h>
#include "sha.h"
#include "crypt_s390.h"
int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len)
{
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
unsigned int bsize = crypto_shash_blocksize(desc->tfm);
unsigned int index;
int ret;
/* how much is already in the buffer? */
index = ctx->count & (bsize - 1);
ctx->count += len;
if ((index + len) < bsize)
goto store;
/* process one stored block */
if (index) {
memcpy(ctx->buf + index, data, bsize - index);
ret = crypt_s390_kimd(ctx->func, ctx->state, ctx->buf, bsize);
if (ret != bsize)
return -EIO;
data += bsize - index;
len -= bsize - index;
index = 0;
}
/* process as many blocks as possible */
if (len >= bsize) {
ret = crypt_s390_kimd(ctx->func, ctx->state, data,
len & ~(bsize - 1));
if (ret != (len & ~(bsize - 1)))
return -EIO;
data += ret;
len -= ret;
}
store:
if (len)
memcpy(ctx->buf + index , data, len);
return 0;
}
EXPORT_SYMBOL_GPL(s390_sha_update);
int s390_sha_final(struct shash_desc *desc, u8 *out)
{
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
unsigned int bsize = crypto_shash_blocksize(desc->tfm);
u64 bits;
unsigned int index, end, plen;
int ret;
/* SHA-512 uses 128 bit padding length */
plen = (bsize > SHA256_BLOCK_SIZE) ? 16 : 8;
/* must perform manual padding */
index = ctx->count & (bsize - 1);
end = (index < bsize - plen) ? bsize : (2 * bsize);
/* start pad with 1 */
ctx->buf[index] = 0x80;
index++;
/* pad with zeros */
memset(ctx->buf + index, 0x00, end - index - 8);
/*
* Append message length. Well, SHA-512 wants a 128 bit length value,
* nevertheless we use u64, should be enough for now...
*/
bits = ctx->count * 8;
memcpy(ctx->buf + end - 8, &bits, sizeof(bits));
ret = crypt_s390_kimd(ctx->func, ctx->state, ctx->buf, end);
if (ret != end)
return -EIO;
/* copy digest to out */
memcpy(out, ctx->state, crypto_shash_digestsize(desc->tfm));
/* wipe context */
memset(ctx, 0, sizeof *ctx);
return 0;
}
EXPORT_SYMBOL_GPL(s390_sha_final);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("s390 SHA cipher common functions");