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67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/*
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* This code implements the MD5 message-digest algorithm.
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* The algorithm is due to Ron Rivest. This code was
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* written by Colin Plumb in 1993, no copyright is claimed.
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* This code is in the public domain; do with it what you wish.
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*
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* Equivalent code is available from RSA Data Security, Inc.
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* This code has been tested against that, and is equivalent,
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* except that you don't need to include two pages of legalese
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* with every copy.
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*
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* To compute the message digest of a chunk of bytes, declare an
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* MD5Context structure, pass it to MHD_MD5Init, call MHD_MD5Update as
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* needed on buffers full of bytes, and then call MHD_MD5Final, which
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* will fill a supplied 16-byte array with the digest.
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*/
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#ifndef MHD_MD5_H
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#define MHD_MD5_H
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#include "platform.h"
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#define MD5_BLOCK_SIZE 64
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#define MD5_DIGEST_SIZE 16
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#define MD5_DIGEST_STRING_LENGTH (MD5_DIGEST_SIZE * 2 + 1)
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struct MD5Context
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{
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uint32_t state[4]; /* state */
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uint64_t count; /* number of bits, mod 2^64 */
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uint8_t buffer[MD5_BLOCK_SIZE]; /* input buffer */
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};
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/*
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* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
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* initialization constants.
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*/
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void MHD_MD5Init (struct MD5Context *ctx);
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/*
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* Update context to reflect the concatenation of another buffer full
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* of bytes.
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*/
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void MHD_MD5Update (struct MD5Context *ctx, const unsigned char *input, size_t
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len);
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/*
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* Pad pad to 64-byte boundary with the bit pattern
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* 1 0* (64-bit count of bits processed, MSB-first)
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*/
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void MD5Pad (struct MD5Context *ctx);
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/*
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* Final wrapup--call MD5Pad, fill in digest and zero out ctx.
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*/
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void MHD_MD5Final (unsigned char digest[MD5_DIGEST_SIZE], struct
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MD5Context *ctx);
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/*
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* The core of the MD5 algorithm, this alters an existing MD5 hash to
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* reflect the addition of 16 longwords of new data. MHD_MD5Update blocks
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* the data and converts bytes into longwords for this routine.
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*/
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void MD5Transform (uint32_t state[4], const uint8_t block[MD5_BLOCK_SIZE]);
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#endif /* !MHD_MD5_H */
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