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Mself / Sdata: on the fly partial decoding support (#2468)

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Jake 2017-03-06 18:59:05 -06:00 • committed by raven02
parent 039e295e53
commit 87fe93ee9a
8 changed files with 616 additions and 459 deletions
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78
rpcs3/Crypto/utils.cpp
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@ -9,28 +9,10 @@
#include <memory>
// Auxiliary functions (endian swap, xor and prng).
u16 swap16(u16 i)
{
return ((i & 0xFF00) >> 8) | ((i & 0xFF) << 8);
}
u32 swap32(u32 i)
void xor_key(unsigned char *dest, unsigned char *src1, unsigned char *src2)
{
return ((i & 0xFF000000) >> 24) | ((i & 0xFF0000) >> 8) | ((i & 0xFF00) << 8) | ((i & 0xFF) << 24);
}
u64 swap64(u64 i)
{
return ((i & 0x00000000000000ff) << 56) | ((i & 0x000000000000ff00) << 40) |
((i & 0x0000000000ff0000) << 24) | ((i & 0x00000000ff000000) << 8) |
((i & 0x000000ff00000000) >> 8) | ((i & 0x0000ff0000000000) >> 24) |
((i & 0x00ff000000000000) >> 40) | ((i & 0xff00000000000000) >> 56);
}
void xor_key(unsigned char *dest, unsigned char *src1, unsigned char *src2, int size)
{
int i;
for(i = 0; i < size; i++)
for(int i = 0; i < 0x10; i++)
{
dest[i] = src1[i] ^ src2[i];
}
@ -38,16 +20,10 @@ void xor_key(unsigned char *dest, unsigned char *src1, unsigned char *src2, int
void prng(unsigned char *dest, int size)
{
unsigned char *buffer = new unsigned char[size];
srand((u32)time(0));
int i;
for(i = 0; i < size; i++)
buffer[i] = (unsigned char)(rand() & 0xFF);
memcpy(dest, buffer, size);
delete[] buffer;
for(int i = 0; i < size; i++)
dest[i] = (unsigned char)(rand() & 0xFF);
}
// Hex string conversion auxiliary functions.
@ -102,19 +78,19 @@ void hex_to_bytes(unsigned char *data, const char *hex_str, unsigned int str_len
bool is_hex(const char* hex_str, unsigned int str_length)
{
static const char hex_chars[] = "0123456789abcdefABCDEF";
static const char hex_chars[] = "0123456789abcdefABCDEF";
if (hex_str == NULL)
return false;
if (hex_str == NULL)
return false;
unsigned int i;
for (i = 0; i < str_length; i++)
unsigned int i;
for (i = 0; i < str_length; i++)
{
if (strchr(hex_chars, hex_str[i]) == 0)
return false;
}
return true;
return true;
}
// Crypto functions (AES128-CBC, AES128-ECB, SHA1-HMAC and AES-CMAC).
@ -147,22 +123,11 @@ void aesecb128_encrypt(unsigned char *key, unsigned char *in, unsigned char *out
bool hmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash, int hash_len)
{
unsigned char *out = new unsigned char[key_len];
std::unique_ptr<u8> out(new u8[key_len]);
sha1_hmac(key, key_len, in, in_len, out);
sha1_hmac(key, key_len, in, in_len, out.get());
for (int i = 0; i < hash_len; i++)
{
if (out[i] != hash[i])
{
delete[] out;
return false;
}
}
delete[] out;
return true;
return std::memcmp(out.get(), hash, hash_len) == 0;
}
void hmac_hash_forge(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash)
@ -172,24 +137,13 @@ void hmac_hash_forge(unsigned char *key, int key_len, unsigned char *in, int in_
bool cmac_hash_compare(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash, int hash_len)
{
unsigned char *out = new unsigned char[key_len];
std::unique_ptr<u8> out(new u8[key_len]);
aes_context ctx;
aes_setkey_enc(&ctx, key, 128);
aes_cmac(&ctx, in_len, in, out);
aes_cmac(&ctx, in_len, in, out.get());
for (int i = 0; i < hash_len; i++)
{
if (out[i] != hash[i])
{
delete[] out;
return false;
}
}
delete[] out;
return true;
return std::memcmp(out.get(), hash, hash_len) == 0;
}
void cmac_hash_forge(unsigned char *key, int key_len, unsigned char *in, int in_len, unsigned char *hash)