GNU libmicrohttpd  0.9.29
md5.h
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1 /*
2  * This code implements the MD5 message-digest algorithm.
3  * The algorithm is due to Ron Rivest. This code was
4  * written by Colin Plumb in 1993, no copyright is claimed.
5  * This code is in the public domain; do with it what you wish.
6  *
7  * Equivalent code is available from RSA Data Security, Inc.
8  * This code has been tested against that, and is equivalent,
9  * except that you don't need to include two pages of legalese
10  * with every copy.
11  *
12  * To compute the message digest of a chunk of bytes, declare an
13  * MD5Context structure, pass it to MD5Init, call MD5Update as
14  * needed on buffers full of bytes, and then call MD5Final, which
15  * will fill a supplied 16-byte array with the digest.
16  */
17 
18 #ifndef MHD_MD5_H
19 #define MHD_MD5_H
20 
21 #include "platform.h"
22 
23 #define MD5_BLOCK_SIZE 64
24 #define MD5_DIGEST_SIZE 16
25 #define MD5_DIGEST_STRING_LENGTH (MD5_DIGEST_SIZE * 2 + 1)
26 
27 struct MD5Context
28 {
29  uint32_t state[4]; /* state */
30  uint64_t count; /* number of bits, mod 2^64 */
31  uint8_t buffer[MD5_BLOCK_SIZE]; /* input buffer */
32 };
33 
34 /*
35  * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
36  * initialization constants.
37  */
38 void MD5Init(struct MD5Context *ctx);
39 
40 /*
41  * Update context to reflect the concatenation of another buffer full
42  * of bytes.
43  */
44 void MD5Update(struct MD5Context *ctx, const unsigned char *input, size_t len);
45 
46 /*
47  * Pad pad to 64-byte boundary with the bit pattern
48  * 1 0* (64-bit count of bits processed, MSB-first)
49  */
50 void MD5Pad(struct MD5Context *ctx);
51 
52 /*
53  * Final wrapup--call MD5Pad, fill in digest and zero out ctx.
54  */
55 void MD5Final(unsigned char digest[MD5_DIGEST_SIZE], struct MD5Context *ctx);
56 
57 /*
58  * The core of the MD5 algorithm, this alters an existing MD5 hash to
59  * reflect the addition of 16 longwords of new data. MD5Update blocks
60  * the data and converts bytes into longwords for this routine.
61  */
62 void MD5Transform(uint32_t state[4], const uint8_t block[MD5_BLOCK_SIZE]);
63 
64 #endif /* !MHD_MD5_H */
uint8_t buffer[MD5_BLOCK_SIZE]
Definition: md5.h:31
uint64_t count
Definition: md5.h:30
void MD5Init(struct MD5Context *ctx)
Definition: md5.c:50
platform-specific includes for libmicrohttpd
void MD5Transform(uint32_t state[4], const uint8_t block[MD5_BLOCK_SIZE])
Definition: md5.c:168
#define MD5_BLOCK_SIZE
Definition: md5.h:23
void MD5Final(unsigned char digest[MD5_DIGEST_SIZE], struct MD5Context *ctx)
Definition: md5.c:135
Definition: md5.h:27
#define MD5_DIGEST_SIZE
Definition: md5.h:24
void MD5Update(struct MD5Context *ctx, const unsigned char *input, size_t len)
Definition: md5.c:67
void MD5Pad(struct MD5Context *ctx)
Definition: md5.c:111
uint32_t state[4]
Definition: md5.h:29