diff options
Diffstat (limited to 'core/fdrm/crypto/fx_crypt.cpp')
| -rw-r--r-- | core/fdrm/crypto/fx_crypt.cpp | 122 |
1 files changed, 59 insertions, 63 deletions
diff --git a/core/fdrm/crypto/fx_crypt.cpp b/core/fdrm/crypto/fx_crypt.cpp index d1a1aae471..693b2ef1cf 100644 --- a/core/fdrm/crypto/fx_crypt.cpp +++ b/core/fdrm/crypto/fx_crypt.cpp @@ -6,60 +6,6 @@ #include "core/fdrm/crypto/fx_crypt.h" -#ifdef __cplusplus -extern "C" { -#endif - -void CRYPT_ArcFourSetup(CRYPT_rc4_context* s, - const uint8_t* key, - uint32_t length) { - int i, j, k, *m, a; - s->x = 0; - s->y = 0; - m = s->m; - for (i = 0; i < 256; i++) { - m[i] = i; - } - j = k = 0; - for (i = 0; i < 256; i++) { - a = m[i]; - j = (j + a + key[k]) & 0xFF; - m[i] = m[j]; - m[j] = a; - if (++k >= (int)length) { - k = 0; - } - } -} - -void CRYPT_ArcFourCrypt(CRYPT_rc4_context* s, - unsigned char* data, - uint32_t length) { - int i, x, y, *m, a, b; - x = s->x; - y = s->y; - m = s->m; - for (i = 0; i < (int)length; i++) { - x = (x + 1) & 0xFF; - a = m[x]; - y = (y + a) & 0xFF; - m[x] = b = m[y]; - m[y] = a; - data[i] ^= m[(a + b) & 0xFF]; - } - s->x = x; - s->y = y; -} - -void CRYPT_ArcFourCryptBlock(uint8_t* pData, - uint32_t size, - const uint8_t* key, - uint32_t keylen) { - CRYPT_rc4_context s; - CRYPT_ArcFourSetup(&s, key, keylen); - CRYPT_ArcFourCrypt(&s, pData, size); -} - #define GET_UINT32(n, b, i) \ { \ (n) = (uint32_t)((uint8_t*)b)[(i)] | \ @@ -75,6 +21,13 @@ void CRYPT_ArcFourCryptBlock(uint8_t* pData, (((uint8_t*)b)[(i) + 3]) = (uint8_t)(((n) >> 24) & 0xFF); \ } +namespace { + +const uint8_t md5_padding[64] = { + 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + void md5_process(CRYPT_md5_context* ctx, const uint8_t data[64]) { uint32_t A, B, C, D, X[16]; GET_UINT32(X[0], data, 0); @@ -181,6 +134,58 @@ void md5_process(CRYPT_md5_context* ctx, const uint8_t data[64]) { ctx->state[3] += D; } +} // namespace + +void CRYPT_ArcFourSetup(CRYPT_rc4_context* s, + const uint8_t* key, + uint32_t length) { + int i, j, k, *m, a; + s->x = 0; + s->y = 0; + m = s->m; + for (i = 0; i < 256; i++) { + m[i] = i; + } + j = k = 0; + for (i = 0; i < 256; i++) { + a = m[i]; + j = (j + a + key[k]) & 0xFF; + m[i] = m[j]; + m[j] = a; + if (++k >= (int)length) { + k = 0; + } + } +} + +void CRYPT_ArcFourCrypt(CRYPT_rc4_context* s, + unsigned char* data, + uint32_t length) { + int i, x, y, *m, a, b; + x = s->x; + y = s->y; + m = s->m; + for (i = 0; i < (int)length; i++) { + x = (x + 1) & 0xFF; + a = m[x]; + y = (y + a) & 0xFF; + m[x] = b = m[y]; + m[y] = a; + data[i] ^= m[(a + b) & 0xFF]; + } + s->x = x; + s->y = y; +} + +void CRYPT_ArcFourCryptBlock(uint8_t* pData, + uint32_t size, + const uint8_t* key, + uint32_t keylen) { + CRYPT_rc4_context s; + CRYPT_ArcFourSetup(&s, key, keylen); + CRYPT_ArcFourCrypt(&s, pData, size); +} + void CRYPT_MD5Start(CRYPT_md5_context* ctx) { ctx->total[0] = 0; ctx->total[1] = 0; @@ -220,11 +225,6 @@ void CRYPT_MD5Update(CRYPT_md5_context* ctx, } } -const uint8_t md5_padding[64] = { - 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; - void CRYPT_MD5Finish(CRYPT_md5_context* ctx, uint8_t digest[16]) { uint32_t last, padn; uint8_t msglen[8]; @@ -248,7 +248,3 @@ void CRYPT_MD5Generate(const uint8_t* input, CRYPT_MD5Update(&ctx, input, length); CRYPT_MD5Finish(&ctx, digest); } - -#ifdef __cplusplus -}; -#endif |