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Diffstat (limited to 'md5.cpp')
| -rw-r--r-- | md5.cpp | 382 |
1 files changed, 382 insertions, 0 deletions
@@ -0,0 +1,382 @@ +#include <memory.h> +#include "Types.h" + +// "Derived from the RSA Data Security, Inc. MD5 Message Digest Algorithm" + +/** + * \brief MD5 context structure + */ +typedef struct +{ + unsigned long total[2]; /*!< number of bytes processed */ + unsigned long state[4]; /*!< intermediate digest state */ + unsigned char buffer[64]; /*!< data block being processed */ + + unsigned char ipad[64]; /*!< HMAC: inner padding */ + unsigned char opad[64]; /*!< HMAC: outer padding */ +} +md5_context; + +/** + * \brief MD5 context setup + * + * \param ctx context to be initialized + */ +void md5_starts( md5_context *ctx ); + +/** + * \brief MD5 process buffer + * + * \param ctx MD5 context + * \param input buffer holding the data + * \param ilen length of the input data + */ +void md5_update( md5_context *ctx, unsigned char *input, int ilen ); + +/** + * \brief MD5 final digest + * + * \param ctx MD5 context + * \param output MD5 checksum result + */ +void md5_finish( md5_context *ctx, unsigned char output[16] ); + +/** + * \brief Output = MD5( input buffer ) + * + * \param input buffer holding the data + * \param ilen length of the input data + * \param output MD5 checksum result + */ +void md5( unsigned char *input, int ilen, unsigned char output[16] ); + +/** + * \brief Output = MD5( file contents ) + * + * \param path input file name + * \param output MD5 checksum result + * + * \return 0 if successful, 1 if fopen failed, + * or 2 if fread failed + */ +int md5_file( char *path, unsigned char output[16] ); + +/** + * \brief MD5 HMAC context setup + * + * \param ctx HMAC context to be initialized + * \param key HMAC secret key + * \param keylen length of the HMAC key + */ +void md5_hmac_starts( md5_context *ctx, unsigned char *key, int keylen ); + +/** + * \brief MD5 HMAC process buffer + * + * \param ctx HMAC context + * \param input buffer holding the data + * \param ilen length of the input data + */ +void md5_hmac_update( md5_context *ctx, unsigned char *input, int ilen ); + +/** + * \brief MD5 HMAC final digest + * + * \param ctx HMAC context + * \param output MD5 HMAC checksum result + */ +void md5_hmac_finish( md5_context *ctx, unsigned char output[16] ); + +/** + * \brief Output = HMAC-MD5( hmac key, input buffer ) + * + * \param key HMAC secret key + * \param keylen length of the HMAC key + * \param input buffer holding the data + * \param ilen length of the input data + * \param output HMAC-MD5 result + */ +void md5_hmac( unsigned char *key, int keylen, + unsigned char *input, int ilen, + unsigned char output[16] ); + +/** + * \brief Checkup routine + * + * \return 0 if successful, or 1 if the test failed + */ +int md5_self_test( int verbose ); + +/* + * 32-bit integer manipulation macros (little endian) + */ +#ifndef GET_ULONG_LE +#define GET_ULONG_LE(n,b,i) \ +{ \ + (n) = ( (unsigned long) (b)[(i) ] ) \ + | ( (unsigned long) (b)[(i) + 1] << 8 ) \ + | ( (unsigned long) (b)[(i) + 2] << 16 ) \ + | ( (unsigned long) (b)[(i) + 3] << 24 ); \ +} +#endif + +#ifndef PUT_ULONG_LE +#define PUT_ULONG_LE(n,b,i) \ +{ \ + (b)[(i) ] = (unsigned char) ( (n) ); \ + (b)[(i) + 1] = (unsigned char) ( (n) >> 8 ); \ + (b)[(i) + 2] = (unsigned char) ( (n) >> 16 ); \ + (b)[(i) + 3] = (unsigned char) ( (n) >> 24 ); \ +} +#endif + +/* + * MD5 context setup + */ +void md5_starts( md5_context *ctx ) +{ + ctx->total[0] = 0; + ctx->total[1] = 0; + + ctx->state[0] = 0x67452301; + ctx->state[1] = 0xEFCDAB89; + ctx->state[2] = 0x98BADCFE; + ctx->state[3] = 0x10325476; +} + +static void md5_process( md5_context *ctx, unsigned char data[64] ) +{ + unsigned long X[16], A, B, C, D; + + GET_ULONG_LE( X[ 0], data, 0 ); + GET_ULONG_LE( X[ 1], data, 4 ); + GET_ULONG_LE( X[ 2], data, 8 ); + GET_ULONG_LE( X[ 3], data, 12 ); + GET_ULONG_LE( X[ 4], data, 16 ); + GET_ULONG_LE( X[ 5], data, 20 ); + GET_ULONG_LE( X[ 6], data, 24 ); + GET_ULONG_LE( X[ 7], data, 28 ); + GET_ULONG_LE( X[ 8], data, 32 ); + GET_ULONG_LE( X[ 9], data, 36 ); + GET_ULONG_LE( X[10], data, 40 ); + GET_ULONG_LE( X[11], data, 44 ); + GET_ULONG_LE( X[12], data, 48 ); + GET_ULONG_LE( X[13], data, 52 ); + GET_ULONG_LE( X[14], data, 56 ); + GET_ULONG_LE( X[15], data, 60 ); + +#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n))) + +#define P(a,b,c,d,k,s,t) \ +{ \ + a += F(b,c,d) + X[k] + t; a = S(a,s) + b; \ +} + + A = ctx->state[0]; + B = ctx->state[1]; + C = ctx->state[2]; + D = ctx->state[3]; + +#define F(x,y,z) (z ^ (x & (y ^ z))) + + P( A, B, C, D, 0, 7, 0xD76AA478 ); + P( D, A, B, C, 1, 12, 0xE8C7B756 ); + P( C, D, A, B, 2, 17, 0x242070DB ); + P( B, C, D, A, 3, 22, 0xC1BDCEEE ); + P( A, B, C, D, 4, 7, 0xF57C0FAF ); + P( D, A, B, C, 5, 12, 0x4787C62A ); + P( C, D, A, B, 6, 17, 0xA8304613 ); + P( B, C, D, A, 7, 22, 0xFD469501 ); + P( A, B, C, D, 8, 7, 0x698098D8 ); + P( D, A, B, C, 9, 12, 0x8B44F7AF ); + P( C, D, A, B, 10, 17, 0xFFFF5BB1 ); + P( B, C, D, A, 11, 22, 0x895CD7BE ); + P( A, B, C, D, 12, 7, 0x6B901122 ); + P( D, A, B, C, 13, 12, 0xFD987193 ); + P( C, D, A, B, 14, 17, 0xA679438E ); + P( B, C, D, A, 15, 22, 0x49B40821 ); + +#undef F + +#define F(x,y,z) (y ^ (z & (x ^ y))) + + P( A, B, C, D, 1, 5, 0xF61E2562 ); + P( D, A, B, C, 6, 9, 0xC040B340 ); + P( C, D, A, B, 11, 14, 0x265E5A51 ); + P( B, C, D, A, 0, 20, 0xE9B6C7AA ); + P( A, B, C, D, 5, 5, 0xD62F105D ); + P( D, A, B, C, 10, 9, 0x02441453 ); + P( C, D, A, B, 15, 14, 0xD8A1E681 ); + P( B, C, D, A, 4, 20, 0xE7D3FBC8 ); + P( A, B, C, D, 9, 5, 0x21E1CDE6 ); + P( D, A, B, C, 14, 9, 0xC33707D6 ); + P( C, D, A, B, 3, 14, 0xF4D50D87 ); + P( B, C, D, A, 8, 20, 0x455A14ED ); + P( A, B, C, D, 13, 5, 0xA9E3E905 ); + P( D, A, B, C, 2, 9, 0xFCEFA3F8 ); + P( C, D, A, B, 7, 14, 0x676F02D9 ); + P( B, C, D, A, 12, 20, 0x8D2A4C8A ); + +#undef F + +#define F(x,y,z) (x ^ y ^ z) + + P( A, B, C, D, 5, 4, 0xFFFA3942 ); + P( D, A, B, C, 8, 11, 0x8771F681 ); + P( C, D, A, B, 11, 16, 0x6D9D6122 ); + P( B, C, D, A, 14, 23, 0xFDE5380C ); + P( A, B, C, D, 1, 4, 0xA4BEEA44 ); + P( D, A, B, C, 4, 11, 0x4BDECFA9 ); + P( C, D, A, B, 7, 16, 0xF6BB4B60 ); + P( B, C, D, A, 10, 23, 0xBEBFBC70 ); + P( A, B, C, D, 13, 4, 0x289B7EC6 ); + P( D, A, B, C, 0, 11, 0xEAA127FA ); + P( C, D, A, B, 3, 16, 0xD4EF3085 ); + P( B, C, D, A, 6, 23, 0x04881D05 ); + P( A, B, C, D, 9, 4, 0xD9D4D039 ); + P( D, A, B, C, 12, 11, 0xE6DB99E5 ); + P( C, D, A, B, 15, 16, 0x1FA27CF8 ); + P( B, C, D, A, 2, 23, 0xC4AC5665 ); + +#undef F + +#define F(x,y,z) (y ^ (x | ~z)) + + P( A, B, C, D, 0, 6, 0xF4292244 ); + P( D, A, B, C, 7, 10, 0x432AFF97 ); + P( C, D, A, B, 14, 15, 0xAB9423A7 ); + P( B, C, D, A, 5, 21, 0xFC93A039 ); + P( A, B, C, D, 12, 6, 0x655B59C3 ); + P( D, A, B, C, 3, 10, 0x8F0CCC92 ); + P( C, D, A, B, 10, 15, 0xFFEFF47D ); + P( B, C, D, A, 1, 21, 0x85845DD1 ); + P( A, B, C, D, 8, 6, 0x6FA87E4F ); + P( D, A, B, C, 15, 10, 0xFE2CE6E0 ); + P( C, D, A, B, 6, 15, 0xA3014314 ); + P( B, C, D, A, 13, 21, 0x4E0811A1 ); + P( A, B, C, D, 4, 6, 0xF7537E82 ); + P( D, A, B, C, 11, 10, 0xBD3AF235 ); + P( C, D, A, B, 2, 15, 0x2AD7D2BB ); + P( B, C, D, A, 9, 21, 0xEB86D391 ); + +#undef F + + ctx->state[0] += A; + ctx->state[1] += B; + ctx->state[2] += C; + ctx->state[3] += D; +} + +/* + * MD5 process buffer + */ +void md5_update( md5_context *ctx, unsigned char *input, int ilen ) +{ + int fill; + unsigned long left; + + if( ilen <= 0 ) + return; + + left = ctx->total[0] & 0x3F; + fill = 64 - left; + + ctx->total[0] += ilen; + ctx->total[0] &= 0xFFFFFFFF; + + if( ctx->total[0] < (unsigned long) ilen ) + ctx->total[1]++; + + if( left && ilen >= fill ) + { + memcpy( (void *) (ctx->buffer + left), + (void *) input, fill ); + md5_process( ctx, ctx->buffer ); + input += fill; + ilen -= fill; + left = 0; + } + + while( ilen >= 64 ) + { + md5_process( ctx, input ); + input += 64; + ilen -= 64; + } + + if( ilen > 0 ) + { + memcpy( (void *) (ctx->buffer + left), + (void *) input, ilen ); + } +} + +static const unsigned char 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 +}; + +/* + * MD5 final digest + */ +void md5_finish( md5_context *ctx, unsigned char output[16] ) +{ + unsigned long last, padn; + unsigned long high, low; + unsigned char msglen[8]; + + high = ( ctx->total[0] >> 29 ) + | ( ctx->total[1] << 3 ); + low = ( ctx->total[0] << 3 ); + + PUT_ULONG_LE( low, msglen, 0 ); + PUT_ULONG_LE( high, msglen, 4 ); + + last = ctx->total[0] & 0x3F; + padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last ); + + md5_update( ctx, (unsigned char *) md5_padding, padn ); + md5_update( ctx, msglen, 8 ); + + PUT_ULONG_LE( ctx->state[0], output, 0 ); + PUT_ULONG_LE( ctx->state[1], output, 4 ); + PUT_ULONG_LE( ctx->state[2], output, 8 ); + PUT_ULONG_LE( ctx->state[3], output, 12 ); +} + +/* + * output = MD5( input buffer ) + */ +void md5( unsigned char *input, int ilen, unsigned char output[16] ) +{ + md5_context ctx; + + md5_starts( &ctx ); + md5_update( &ctx, input, ilen ); + md5_finish( &ctx, output ); + + memset( &ctx, 0, sizeof( md5_context ) ); +} + +unsigned int md5hash ( const void * input, int len, unsigned int /*seed*/ ) +{ + unsigned int hash[4]; + + md5((unsigned char *)input,len,(unsigned char *)hash); + + //return hash[0] ^ hash[1] ^ hash[2] ^ hash[3]; + + return hash[0]; +} + +void md5_32 ( const void * key, int len, uint32_t /*seed*/, void * out ) +{ + unsigned int hash[4]; + + md5((unsigned char*)key,len,(unsigned char*)hash); + + *(uint32_t*)out = hash[0]; +}
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