1 /* Declaration of functions and data types used for MD5 sum computing
3 Copyright (C) 1995,1996,1997,1999,2000,2001 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
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7 modify it under the terms of the GNU Lesser General Public
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
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26 #include <sys/types.h>
27 typedef size_t md5_uintptr;
29 /* Length in bytes of the MD5 digest */
30 #define MD5_DIGEST_SIZE 16
32 /* Structure to save state of computation between the single steps. */
46 * The following three functions are build up the low level used in
47 * the functions `md5_stream' and `md5_buffer'.
50 /* Initialize structure containing state of computation.
51 (RFC 1321, 3.3: Step 3) */
52 extern void md5_init(struct md5_ctx *ctx);
54 /* Starting with the result of former calls of this function (or the
55 initialization function update the context for the next LEN bytes
57 It is NOT required that LEN is a multiple of 64. */
58 extern void md5_update(struct md5_ctx *ctx, unsigned length,
59 const uint8_t *buffer);
61 /* Process the remaining bytes in the buffer and put result from CTX
62 in first 16 bytes following RESBUF. The result is always in little
63 endian byte order, so that a byte-wise output yields to the wanted
64 ASCII representation of the message digest.
66 IMPORTANT: On some systems it is required that RESBUF is correctly
67 aligned for a 32 bits value. */
68 extern void md5_digest(struct md5_ctx *ctx, unsigned length, uint8_t *resbuf);