X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/5149e37e66dd3324905ec7e18e67798b03f16ef6..99cf19d9e8b450422f61c467751e8570537ab718:/armsrc/des.c?ds=inline diff --git a/armsrc/des.c b/armsrc/des.c index 0a27503e..172b3235 100644 --- a/armsrc/des.c +++ b/armsrc/des.c @@ -378,6 +378,60 @@ void tdes_dec(void* out, void* in, const uint8_t* key){ des_dec(out, out, (uint8_t*)key + 0); } + void tdes_2key_enc(void* out, const void* in, size_t length, const void* key, unsigned char iv[8]){ + + if( length % 8 ) return; + + uint8_t i; + uint8_t* tin = (uint8_t*) in; + uint8_t* tout = (uint8_t*) out; + + while( length > 0 ) + { + for( i = 0; i < 8; i++ ) + tout[i] = (unsigned char)( tin[i] ^ iv[i] ); + + des_enc(tout, tin, (uint8_t*)key + 0); + des_dec(tout, tout, (uint8_t*)key + 8); + des_enc(tout, tout, (uint8_t*)key + 0); + + memcpy( iv, tout, 8 ); + + tin += 8; + tout += 8; + length -= 8; + } + } + + void tdes_2key_dec(void* out, const void* in, size_t length, const void* key, unsigned char iv[8]){ + + if( length % 8 ) return; + + uint8_t i; + unsigned char temp[8]; + + uint8_t* tin = (uint8_t*) in; + uint8_t* tout = (uint8_t*) out; + + while( length > 0 ) + { + memcpy( temp, tin, 8 ); + + des_dec(tout, tin, (uint8_t*)key + 0); + des_enc(tout, tout, (uint8_t*)key + 8); + des_dec(tout, tout, (uint8_t*)key + 0); + + for( i = 0; i < 8; i++ ) + tout[i] = (unsigned char)( tout[i] ^ iv[i] ); + + memcpy( iv, temp, 8 ); + + tin += 8; + tout += 8; + length -= 8; + } + } + /******************************************************************************/