Fixed MTP to work with TWRP

include/sdp/dek_common.h

@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ *
+ * Sensitive Data Protection
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef DEK_COMMON_H__
+#define DEK_COMMON_H__
+
+// ==== kernel configs
+#include <linux/limits.h>
+#include <linux/ioctl.h>
+#include <linux/device.h>
+
+#include <sdp/common.h>
+
+// ==== common configs
+#define SDPK_DEFAULT_ALGOTYPE (SDPK_ALGOTYPE_ASYMM_ECDH)
+#define SDPK_ALGOTYPE_ASYMM_RSA 0
+#define SDPK_ALGOTYPE_ASYMM_DH  1
+#define SDPK_ALGOTYPE_ASYMM_ECDH  2
+
+//#define DEK_ENGINE_LOCAL_KEK
+#define KEK_RSA_KEY_BITS        2048
+#define KEK_MK_BITS             256
+#define KEK_SS_BITS             256
+
+#define DH_DEFAULT_GENERATOR	DH_GENERATOR_2
+#define DH_MAXLEN				256
+
+#define DEK_NAME_LEN            256
+#define DEK_LEN             	32
+#define DEK_MAXLEN          	400 // TODO : need to optimize the length of EDEK DEK_RSA_KEY_BITS/8 : 256 bytes , DH2236 : 280 bytes
+#define DEK_PW_LEN              32
+#define KEK_MAXLEN         		(KEK_RSA_KEY_BITS/4+4)
+#define KEK_MK_LEN              (KEK_MK_BITS/8)
+#define KEK_SS_LEN              (KEK_SS_BITS/8)
+#define DEK_AES_HEADER          44
+#define FEK_MAXLEN				32
+#define EFEK_MAXLEN				(FEK_MAXLEN+16)
+
+#define AES_BLOCK_SIZE 			16
+
+// DEK types
+#define DEK_TYPE_PLAIN          0
+#define DEK_TYPE_RSA_ENC        1
+#define DEK_TYPE_AES_ENC        2
+//#define DEK_TYPE_DH_PUB       4
+#define DEK_TYPE_DH_ENC         5
+#define DEK_TYPE_ECDH256_ENC    6
+
+// KEK types
+#define KEK_TYPE_SYM 		10
+#define KEK_TYPE_RSA_PUB 	11
+#define KEK_TYPE_RSA_PRIV 	12
+#define KEK_TYPE_DH_PUB 	13
+#define KEK_TYPE_DH_PRIV 	14
+#define KEK_TYPE_ECDH256_PUB    15
+#define KEK_TYPE_ECDH256_PRIV   16
+
+#define SDPK_PATH_MAX	256
+#define SDPK_PATH_FMT    "/data/system/users/%d/SDPK_%s"
+#define SDPK_RPRI_NAME   "Rpri"
+#define SDPK_RPUB_NAME   "Rpub"
+#define SDPK_DPRI_NAME   "Dpri"
+#define SDPK_DPUB_NAME   "Dpub"
+#define SDPK_EDPRI_NAME   "EDpri"
+#define SDPK_EDPUB_NAME   "EDpub"
+#define SDPK_SYM_NAME     "sym"
+
+typedef struct _password{
+	unsigned int len;
+	unsigned char buf[DEK_MAXLEN];
+}password_t;
+
+typedef struct _key{
+	unsigned int type;
+	unsigned int len;
+	unsigned char buf[DEK_MAXLEN];
+}dek_t;
+
+typedef struct _kek{
+	unsigned int type;
+	unsigned int len;
+	unsigned char buf[KEK_MAXLEN];
+}kek_t;
+
+typedef struct _payload{
+	unsigned int efek_len;
+	unsigned int dpub_len;
+	unsigned char efek_buf[EFEK_MAXLEN];
+	unsigned char dpub_buf[DH_MAXLEN];
+}dh_payload;
+
+/* Debug */
+#define DEK_DEBUG		0
+
+#if DEK_DEBUG
+#define DEK_LOGD(...) printk("dek: "__VA_ARGS__)
+#else
+#define DEK_LOGD(...)
+#endif /* DEK_DEBUG */
+#define DEK_LOGE(...) printk("dek: "__VA_ARGS__)
+
+void key_dump(unsigned char *buf, int len);
+
+int is_kek_available(int userid, int kek_type);
+
+int dek_create_sysfs_asym_alg(struct device *d);
+int dek_create_sysfs_key_dump(struct device *d);
+int get_sdp_sysfs_asym_alg(void);
+int get_sdp_sysfs_key_dump(void);
+
+int is_root(void);
+int is_current_epmd(void);
+int is_current_adbd(void);
+int is_system_server(void);
+
+#endif