From 6ff55cefd060b4c8f6c0fa97d5521516f9ee43f1 Mon Sep 17 00:00:00 2001
From: a3955269 <a3955269>
Date: Tue, 8 Jan 2013 16:14:56 +0000
Subject: Add Samsung TouchWiz decryption

Change-Id: I418680e59372160dabfe3e2d5f0208229aa151ae
---
 crypto/libcrypt_samsung/libcrypt_samsung.c | 68 ++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 crypto/libcrypt_samsung/libcrypt_samsung.c

(limited to 'crypto/libcrypt_samsung/libcrypt_samsung.c')

diff --git a/crypto/libcrypt_samsung/libcrypt_samsung.c b/crypto/libcrypt_samsung/libcrypt_samsung.c
new file mode 100644
index 000000000..4b9b9c5d5
--- /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;
+}
+
-- 
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