tanjent@gmail.com | 7e5c363 | 2010-11-02 00:50:04 +0000 | [diff] [blame] | 1 | #include <memory.h>
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| 2 | #include "Types.h"
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| 3 |
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| 4 | // "Derived from the RSA Data Security, Inc. MD5 Message Digest Algorithm"
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| 5 |
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| 6 | /**
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| 7 | * \brief MD5 context structure
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| 8 | */
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| 9 | typedef struct
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| 10 | {
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| 11 | unsigned long total[2]; /*!< number of bytes processed */
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| 12 | unsigned long state[4]; /*!< intermediate digest state */
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| 13 | unsigned char buffer[64]; /*!< data block being processed */
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| 14 |
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| 15 | unsigned char ipad[64]; /*!< HMAC: inner padding */
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| 16 | unsigned char opad[64]; /*!< HMAC: outer padding */
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| 17 | }
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| 18 | md5_context;
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| 19 |
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| 20 | /**
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| 21 | * \brief MD5 context setup
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| 22 | *
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| 23 | * \param ctx context to be initialized
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| 24 | */
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| 25 | void md5_starts( md5_context *ctx );
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| 26 |
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| 27 | /**
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| 28 | * \brief MD5 process buffer
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| 29 | *
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| 30 | * \param ctx MD5 context
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| 31 | * \param input buffer holding the data
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| 32 | * \param ilen length of the input data
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| 33 | */
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| 34 | void md5_update( md5_context *ctx, unsigned char *input, int ilen );
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| 35 |
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| 36 | /**
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| 37 | * \brief MD5 final digest
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| 38 | *
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| 39 | * \param ctx MD5 context
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| 40 | * \param output MD5 checksum result
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| 41 | */
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| 42 | void md5_finish( md5_context *ctx, unsigned char output[16] );
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| 43 |
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| 44 | /**
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| 45 | * \brief Output = MD5( input buffer )
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| 46 | *
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| 47 | * \param input buffer holding the data
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| 48 | * \param ilen length of the input data
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| 49 | * \param output MD5 checksum result
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| 50 | */
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| 51 | void md5( unsigned char *input, int ilen, unsigned char output[16] );
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| 52 |
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| 53 | /**
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| 54 | * \brief Output = MD5( file contents )
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| 55 | *
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| 56 | * \param path input file name
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| 57 | * \param output MD5 checksum result
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| 58 | *
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| 59 | * \return 0 if successful, 1 if fopen failed,
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| 60 | * or 2 if fread failed
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| 61 | */
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| 62 | int md5_file( char *path, unsigned char output[16] );
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| 63 |
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| 64 | /**
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| 65 | * \brief MD5 HMAC context setup
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| 66 | *
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| 67 | * \param ctx HMAC context to be initialized
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| 68 | * \param key HMAC secret key
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| 69 | * \param keylen length of the HMAC key
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| 70 | */
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| 71 | void md5_hmac_starts( md5_context *ctx, unsigned char *key, int keylen );
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| 72 |
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| 73 | /**
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| 74 | * \brief MD5 HMAC process buffer
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| 75 | *
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| 76 | * \param ctx HMAC context
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| 77 | * \param input buffer holding the data
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| 78 | * \param ilen length of the input data
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| 79 | */
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| 80 | void md5_hmac_update( md5_context *ctx, unsigned char *input, int ilen );
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| 81 |
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| 82 | /**
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| 83 | * \brief MD5 HMAC final digest
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| 84 | *
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| 85 | * \param ctx HMAC context
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| 86 | * \param output MD5 HMAC checksum result
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| 87 | */
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| 88 | void md5_hmac_finish( md5_context *ctx, unsigned char output[16] );
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| 89 |
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| 90 | /**
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| 91 | * \brief Output = HMAC-MD5( hmac key, input buffer )
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| 92 | *
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| 93 | * \param key HMAC secret key
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| 94 | * \param keylen length of the HMAC key
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| 95 | * \param input buffer holding the data
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| 96 | * \param ilen length of the input data
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| 97 | * \param output HMAC-MD5 result
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| 98 | */
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| 99 | void md5_hmac( unsigned char *key, int keylen,
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| 100 | unsigned char *input, int ilen,
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| 101 | unsigned char output[16] );
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| 102 |
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| 103 | /**
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| 104 | * \brief Checkup routine
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| 105 | *
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| 106 | * \return 0 if successful, or 1 if the test failed
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| 107 | */
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| 108 | int md5_self_test( int verbose );
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| 109 |
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| 110 | /*
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| 111 | * 32-bit integer manipulation macros (little endian)
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| 112 | */
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| 113 | #ifndef GET_ULONG_LE
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| 114 | #define GET_ULONG_LE(n,b,i) \
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| 115 | { \
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| 116 | (n) = ( (unsigned long) (b)[(i) ] ) \
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| 117 | | ( (unsigned long) (b)[(i) + 1] << 8 ) \
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| 118 | | ( (unsigned long) (b)[(i) + 2] << 16 ) \
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| 119 | | ( (unsigned long) (b)[(i) + 3] << 24 ); \
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| 120 | }
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| 121 | #endif
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| 122 |
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| 123 | #ifndef PUT_ULONG_LE
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| 124 | #define PUT_ULONG_LE(n,b,i) \
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| 125 | { \
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| 126 | (b)[(i) ] = (unsigned char) ( (n) ); \
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| 127 | (b)[(i) + 1] = (unsigned char) ( (n) >> 8 ); \
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| 128 | (b)[(i) + 2] = (unsigned char) ( (n) >> 16 ); \
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| 129 | (b)[(i) + 3] = (unsigned char) ( (n) >> 24 ); \
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| 130 | }
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| 131 | #endif
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| 132 |
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| 133 | /*
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| 134 | * MD5 context setup
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| 135 | */
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| 136 | void md5_starts( md5_context *ctx )
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| 137 | {
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| 138 | ctx->total[0] = 0;
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| 139 | ctx->total[1] = 0;
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| 140 |
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| 141 | ctx->state[0] = 0x67452301;
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| 142 | ctx->state[1] = 0xEFCDAB89;
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| 143 | ctx->state[2] = 0x98BADCFE;
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| 144 | ctx->state[3] = 0x10325476;
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| 145 | }
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| 146 |
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| 147 | static void md5_process( md5_context *ctx, unsigned char data[64] )
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| 148 | {
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| 149 | unsigned long X[16], A, B, C, D;
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| 150 |
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| 151 | GET_ULONG_LE( X[ 0], data, 0 );
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| 152 | GET_ULONG_LE( X[ 1], data, 4 );
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| 153 | GET_ULONG_LE( X[ 2], data, 8 );
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| 154 | GET_ULONG_LE( X[ 3], data, 12 );
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| 155 | GET_ULONG_LE( X[ 4], data, 16 );
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| 156 | GET_ULONG_LE( X[ 5], data, 20 );
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| 157 | GET_ULONG_LE( X[ 6], data, 24 );
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| 158 | GET_ULONG_LE( X[ 7], data, 28 );
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| 159 | GET_ULONG_LE( X[ 8], data, 32 );
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| 160 | GET_ULONG_LE( X[ 9], data, 36 );
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| 161 | GET_ULONG_LE( X[10], data, 40 );
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| 162 | GET_ULONG_LE( X[11], data, 44 );
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| 163 | GET_ULONG_LE( X[12], data, 48 );
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| 164 | GET_ULONG_LE( X[13], data, 52 );
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| 165 | GET_ULONG_LE( X[14], data, 56 );
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| 166 | GET_ULONG_LE( X[15], data, 60 );
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| 167 |
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| 168 | #define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
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| 169 |
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| 170 | #define P(a,b,c,d,k,s,t) \
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| 171 | { \
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| 172 | a += F(b,c,d) + X[k] + t; a = S(a,s) + b; \
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| 173 | }
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| 174 |
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| 175 | A = ctx->state[0];
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| 176 | B = ctx->state[1];
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| 177 | C = ctx->state[2];
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| 178 | D = ctx->state[3];
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| 179 |
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| 180 | #define F(x,y,z) (z ^ (x & (y ^ z)))
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| 181 |
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| 182 | P( A, B, C, D, 0, 7, 0xD76AA478 );
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| 183 | P( D, A, B, C, 1, 12, 0xE8C7B756 );
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| 184 | P( C, D, A, B, 2, 17, 0x242070DB );
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| 185 | P( B, C, D, A, 3, 22, 0xC1BDCEEE );
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| 186 | P( A, B, C, D, 4, 7, 0xF57C0FAF );
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| 187 | P( D, A, B, C, 5, 12, 0x4787C62A );
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| 188 | P( C, D, A, B, 6, 17, 0xA8304613 );
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| 189 | P( B, C, D, A, 7, 22, 0xFD469501 );
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| 190 | P( A, B, C, D, 8, 7, 0x698098D8 );
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| 191 | P( D, A, B, C, 9, 12, 0x8B44F7AF );
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| 192 | P( C, D, A, B, 10, 17, 0xFFFF5BB1 );
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| 193 | P( B, C, D, A, 11, 22, 0x895CD7BE );
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| 194 | P( A, B, C, D, 12, 7, 0x6B901122 );
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| 195 | P( D, A, B, C, 13, 12, 0xFD987193 );
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| 196 | P( C, D, A, B, 14, 17, 0xA679438E );
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| 197 | P( B, C, D, A, 15, 22, 0x49B40821 );
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| 198 |
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| 199 | #undef F
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| 200 |
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| 201 | #define F(x,y,z) (y ^ (z & (x ^ y)))
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| 202 |
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| 203 | P( A, B, C, D, 1, 5, 0xF61E2562 );
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| 204 | P( D, A, B, C, 6, 9, 0xC040B340 );
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| 205 | P( C, D, A, B, 11, 14, 0x265E5A51 );
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| 206 | P( B, C, D, A, 0, 20, 0xE9B6C7AA );
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| 207 | P( A, B, C, D, 5, 5, 0xD62F105D );
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| 208 | P( D, A, B, C, 10, 9, 0x02441453 );
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| 209 | P( C, D, A, B, 15, 14, 0xD8A1E681 );
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| 210 | P( B, C, D, A, 4, 20, 0xE7D3FBC8 );
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| 211 | P( A, B, C, D, 9, 5, 0x21E1CDE6 );
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| 212 | P( D, A, B, C, 14, 9, 0xC33707D6 );
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| 213 | P( C, D, A, B, 3, 14, 0xF4D50D87 );
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| 214 | P( B, C, D, A, 8, 20, 0x455A14ED );
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| 215 | P( A, B, C, D, 13, 5, 0xA9E3E905 );
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| 216 | P( D, A, B, C, 2, 9, 0xFCEFA3F8 );
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| 217 | P( C, D, A, B, 7, 14, 0x676F02D9 );
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| 218 | P( B, C, D, A, 12, 20, 0x8D2A4C8A );
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| 219 |
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| 220 | #undef F
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| 221 |
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| 222 | #define F(x,y,z) (x ^ y ^ z)
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| 223 |
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| 224 | P( A, B, C, D, 5, 4, 0xFFFA3942 );
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| 225 | P( D, A, B, C, 8, 11, 0x8771F681 );
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| 226 | P( C, D, A, B, 11, 16, 0x6D9D6122 );
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| 227 | P( B, C, D, A, 14, 23, 0xFDE5380C );
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| 228 | P( A, B, C, D, 1, 4, 0xA4BEEA44 );
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| 229 | P( D, A, B, C, 4, 11, 0x4BDECFA9 );
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| 230 | P( C, D, A, B, 7, 16, 0xF6BB4B60 );
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| 231 | P( B, C, D, A, 10, 23, 0xBEBFBC70 );
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| 232 | P( A, B, C, D, 13, 4, 0x289B7EC6 );
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| 233 | P( D, A, B, C, 0, 11, 0xEAA127FA );
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| 234 | P( C, D, A, B, 3, 16, 0xD4EF3085 );
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| 235 | P( B, C, D, A, 6, 23, 0x04881D05 );
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| 236 | P( A, B, C, D, 9, 4, 0xD9D4D039 );
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| 237 | P( D, A, B, C, 12, 11, 0xE6DB99E5 );
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| 238 | P( C, D, A, B, 15, 16, 0x1FA27CF8 );
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| 239 | P( B, C, D, A, 2, 23, 0xC4AC5665 );
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| 240 |
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| 241 | #undef F
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| 242 |
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| 243 | #define F(x,y,z) (y ^ (x | ~z))
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| 244 |
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| 245 | P( A, B, C, D, 0, 6, 0xF4292244 );
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| 246 | P( D, A, B, C, 7, 10, 0x432AFF97 );
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| 247 | P( C, D, A, B, 14, 15, 0xAB9423A7 );
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| 248 | P( B, C, D, A, 5, 21, 0xFC93A039 );
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| 249 | P( A, B, C, D, 12, 6, 0x655B59C3 );
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| 250 | P( D, A, B, C, 3, 10, 0x8F0CCC92 );
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| 251 | P( C, D, A, B, 10, 15, 0xFFEFF47D );
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| 252 | P( B, C, D, A, 1, 21, 0x85845DD1 );
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| 253 | P( A, B, C, D, 8, 6, 0x6FA87E4F );
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| 254 | P( D, A, B, C, 15, 10, 0xFE2CE6E0 );
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| 255 | P( C, D, A, B, 6, 15, 0xA3014314 );
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| 256 | P( B, C, D, A, 13, 21, 0x4E0811A1 );
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| 257 | P( A, B, C, D, 4, 6, 0xF7537E82 );
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| 258 | P( D, A, B, C, 11, 10, 0xBD3AF235 );
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| 259 | P( C, D, A, B, 2, 15, 0x2AD7D2BB );
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| 260 | P( B, C, D, A, 9, 21, 0xEB86D391 );
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| 261 |
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| 262 | #undef F
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| 263 |
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| 264 | ctx->state[0] += A;
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| 265 | ctx->state[1] += B;
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| 266 | ctx->state[2] += C;
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| 267 | ctx->state[3] += D;
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| 268 | }
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| 269 |
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| 270 | /*
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| 271 | * MD5 process buffer
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| 272 | */
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| 273 | void md5_update( md5_context *ctx, unsigned char *input, int ilen )
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| 274 | {
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| 275 | int fill;
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| 276 | unsigned long left;
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| 277 |
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| 278 | if( ilen <= 0 )
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| 279 | return;
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| 280 |
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| 281 | left = ctx->total[0] & 0x3F;
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| 282 | fill = 64 - left;
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| 283 |
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| 284 | ctx->total[0] += ilen;
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| 285 | ctx->total[0] &= 0xFFFFFFFF;
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| 286 |
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| 287 | if( ctx->total[0] < (unsigned long) ilen )
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| 288 | ctx->total[1]++;
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| 289 |
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| 290 | if( left && ilen >= fill )
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| 291 | {
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| 292 | memcpy( (void *) (ctx->buffer + left),
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| 293 | (void *) input, fill );
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| 294 | md5_process( ctx, ctx->buffer );
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| 295 | input += fill;
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| 296 | ilen -= fill;
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| 297 | left = 0;
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| 298 | }
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| 299 |
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| 300 | while( ilen >= 64 )
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| 301 | {
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| 302 | md5_process( ctx, input );
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| 303 | input += 64;
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| 304 | ilen -= 64;
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| 305 | }
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| 306 |
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| 307 | if( ilen > 0 )
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| 308 | {
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| 309 | memcpy( (void *) (ctx->buffer + left),
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| 310 | (void *) input, ilen );
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| 311 | }
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| 312 | }
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| 313 |
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| 314 | static const unsigned char md5_padding[64] =
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| 315 | {
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| 316 | 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 317 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 318 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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| 319 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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| 320 | };
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| 321 |
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| 322 | /*
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| 323 | * MD5 final digest
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| 324 | */
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| 325 | void md5_finish( md5_context *ctx, unsigned char output[16] )
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| 326 | {
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| 327 | unsigned long last, padn;
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| 328 | unsigned long high, low;
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| 329 | unsigned char msglen[8];
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| 330 |
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| 331 | high = ( ctx->total[0] >> 29 )
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| 332 | | ( ctx->total[1] << 3 );
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| 333 | low = ( ctx->total[0] << 3 );
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| 334 |
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| 335 | PUT_ULONG_LE( low, msglen, 0 );
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| 336 | PUT_ULONG_LE( high, msglen, 4 );
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| 337 |
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| 338 | last = ctx->total[0] & 0x3F;
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| 339 | padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
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| 340 |
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| 341 | md5_update( ctx, (unsigned char *) md5_padding, padn );
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| 342 | md5_update( ctx, msglen, 8 );
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| 343 |
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| 344 | PUT_ULONG_LE( ctx->state[0], output, 0 );
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| 345 | PUT_ULONG_LE( ctx->state[1], output, 4 );
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| 346 | PUT_ULONG_LE( ctx->state[2], output, 8 );
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| 347 | PUT_ULONG_LE( ctx->state[3], output, 12 );
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| 348 | }
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| 349 |
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| 350 | /*
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| 351 | * output = MD5( input buffer )
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| 352 | */
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| 353 | void md5( unsigned char *input, int ilen, unsigned char output[16] )
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| 354 | {
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| 355 | md5_context ctx;
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| 356 |
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| 357 | md5_starts( &ctx );
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| 358 | md5_update( &ctx, input, ilen );
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| 359 | md5_finish( &ctx, output );
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| 360 |
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| 361 | memset( &ctx, 0, sizeof( md5_context ) );
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| 362 | }
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| 363 |
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| 364 | unsigned int md5hash ( const void * input, int len, unsigned int /*seed*/ )
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| 365 | {
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| 366 | unsigned int hash[4];
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| 367 |
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| 368 | md5((unsigned char *)input,len,(unsigned char *)hash);
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| 369 |
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| 370 | //return hash[0] ^ hash[1] ^ hash[2] ^ hash[3];
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| 371 |
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| 372 | return hash[0];
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| 373 | }
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| 374 |
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| 375 | void md5_32 ( const void * key, int len, uint32_t /*seed*/, void * out )
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| 376 | {
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| 377 | unsigned int hash[4];
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| 378 |
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| 379 | md5((unsigned char*)key,len,(unsigned char*)hash);
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| 380 |
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| 381 | *(uint32_t*)out = hash[0];
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| 382 | } |