Add Samsung TouchWiz decryption
Change-Id: I418680e59372160dabfe3e2d5f0208229aa151ae
diff --git a/crypto/libcrypt_samsung/libcrypt_samsung.c b/crypto/libcrypt_samsung/libcrypt_samsung.c
new file mode 100644
index 0000000..4b9b9c5
--- /dev/null
+++ b/crypto/libcrypt_samsung/libcrypt_samsung.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2013 a3955269 all rights reversed, no rights reserved.
+ */
+
+//////////////////////////////////////////////////////////////////////////////
+
+#include <string.h>
+#include <stdio.h>
+#include <dlfcn.h>
+
+#include "include/libcrypt_samsung.h"
+
+//////////////////////////////////////////////////////////////////////////////
+void xconvert_key_to_hex_ascii(unsigned char *master_key, unsigned int keysize,
+ char *master_key_ascii)
+{
+ unsigned int i, a;
+ unsigned char nibble;
+
+ for (i=0, a=0; i<keysize; i++, a+=2) {
+ /* For each byte, write out two ascii hex digits */
+ nibble = (master_key[i] >> 4) & 0xf;
+ master_key_ascii[a] = nibble + (nibble > 9 ? 0x37 : 0x30);
+
+ nibble = master_key[i] & 0xf;
+ master_key_ascii[a+1] = nibble + (nibble > 9 ? 0x37 : 0x30);
+ }
+
+ /* Add the null termination */
+ master_key_ascii[a] = '\0';
+
+}
+
+int decrypt_EDK(
+ dek_t *dek, const edk_payload_t *edk, /*const*/ char *passwd)
+{
+ void *lib = dlopen("libsec_km.so", RTLD_LAZY);
+
+ if(!lib)
+ return -100;
+
+ int r = -101;
+ decrypt_EDK_t sym = (decrypt_EDK_t)dlsym(lib, "decrypt_EDK");
+ if(sym)
+ r = sym(dek, edk, passwd);
+
+ dlclose(lib);
+
+ return r;
+}
+
+int mount_ecryptfs_drive(
+ const char *passwd, const char *source, const char *target, int filter)
+{
+ void *lib = dlopen("libsec_ecryptfs.so", RTLD_LAZY);
+ if(!lib)
+ return -100;
+
+ int r = -101;
+ mount_ecryptfs_drive_t sym = (mount_ecryptfs_drive_t)dlsym(lib, "mount_ecryptfs_drive");
+ if(sym)
+ r = sym(passwd, source, target, filter);
+
+ dlclose(lib);
+
+ return r;
+}
+