| /* |
| * Originally from Polarssl here |
| * http://polarssl.org/show_source?file=md5 |
| * under GPL2 or later |
| * truncated to remove hmac support |
| */ |
| |
| |
| #include <string.h> |
| #include <stdio.h> |
| |
| |
| 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 */ |
| } |
| 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, const 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( const 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( const char *path, unsigned char output[16] ); |
| |
| |
| |
| /* |
| * 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, const 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, const 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( const 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 ) ); |
| } |
| |
| /* |
| * output = MD5( file contents ) |
| */ |
| int md5_file( const char *path, unsigned char output[16] ) |
| { |
| FILE *f; |
| size_t n; |
| md5_context ctx; |
| unsigned char buf[1024]; |
| |
| if( ( f = fopen( path, "rb" ) ) == NULL ) |
| return( 1 ); |
| |
| md5_starts( &ctx ); |
| |
| while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 ) |
| md5_update( &ctx, buf, (int) n ); |
| |
| md5_finish( &ctx, output ); |
| |
| memset( &ctx, 0, sizeof( md5_context ) ); |
| |
| if( ferror( f ) != 0 ) |
| { |
| fclose( f ); |
| return( 2 ); |
| } |
| |
| fclose( f ); |
| return( 0 ); |
| } |
| |