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22
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1 /*
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2 Copyright (C) 1999, 2002 Aladdin Enterprises. All rights reserved.
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3
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4 This software is provided 'as-is', without any express or implied
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5 warranty. In no event will the authors be held liable for any damages
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6 arising from the use of this software.
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7
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8 Permission is granted to anyone to use this software for any purpose,
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9 including commercial applications, and to alter it and redistribute it
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10 freely, subject to the following restrictions:
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11
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12 1. The origin of this software must not be misrepresented; you must not
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13 claim that you wrote the original software. If you use this software
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14 in a product, an acknowledgment in the product documentation would be
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15 appreciated but is not required.
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16 2. Altered source versions must be plainly marked as such, and must not be
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17 misrepresented as being the original software.
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18 3. This notice may not be removed or altered from any source distribution.
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19
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20 L. Peter Deutsch
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21 ghost@aladdin.com
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22
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23 */
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24 /* $Id: md5.h,v 1.4 2002/04/13 19:20:28 lpd Exp $ */
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25 /*
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26 Independent implementation of MD5 (RFC 1321).
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27
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28 This code implements the MD5 Algorithm defined in RFC 1321, whose
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29 text is available at
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30 http://www.ietf.org/rfc/rfc1321.txt
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31 The code is derived from the text of the RFC, including the test suite
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32 (section A.5) but excluding the rest of Appendix A. It does not include
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33 any code or documentation that is identified in the RFC as being
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34 copyrighted.
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35
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36 The original and principal author of md5.h is L. Peter Deutsch
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37 <ghost@aladdin.com>. Other authors are noted in the change history
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38 that follows (in reverse chronological order):
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39
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40 2002-04-13 lpd Removed support for non-ANSI compilers; removed
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41 references to Ghostscript; clarified derivation from RFC 1321;
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42 now handles byte order either statically or dynamically.
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43 1999-11-04 lpd Edited comments slightly for automatic TOC extraction.
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44 1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5);
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45 added conditionalization for C++ compilation from Martin
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46 Purschke <purschke@bnl.gov>.
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47 1999-05-03 lpd Original version.
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48 */
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49
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50 #ifndef md5_INCLUDED
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51 # define md5_INCLUDED
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52
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53 /*
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54 * This package supports both compile-time and run-time determination of CPU
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55 * byte order. If ARCH_IS_BIG_ENDIAN is defined as 0, the code will be
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56 * compiled to run only on little-endian CPUs; if ARCH_IS_BIG_ENDIAN is
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57 * defined as non-zero, the code will be compiled to run only on big-endian
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58 * CPUs; if ARCH_IS_BIG_ENDIAN is not defined, the code will be compiled to
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59 * run on either big- or little-endian CPUs, but will run slightly less
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60 * efficiently on either one than if ARCH_IS_BIG_ENDIAN is defined.
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61 */
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62
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63 typedef unsigned char md5_byte_t; /* 8-bit byte */
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64 typedef unsigned int md5_word_t; /* 32-bit word */
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65
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66 /* Define the state of the MD5 Algorithm. */
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67 typedef struct md5_state_s {
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68 md5_word_t count[2]; /* message length in bits, lsw first */
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69 md5_word_t abcd[4]; /* digest buffer */
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70 md5_byte_t buf[64]; /* accumulate block */
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71 } md5_state_t;
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72
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73 #ifdef __cplusplus
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74 extern "C"
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75 {
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76 #endif
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77
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78 /* Initialize the algorithm. */
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79 void md5_init(md5_state_t *pms);
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80
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81 /* Append a string to the message. */
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82 void md5_append(md5_state_t *pms, const md5_byte_t *data, int nbytes);
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83
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84 /* Finish the message and return the digest. */
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85 void md5_finish(md5_state_t *pms, md5_byte_t digest[16]);
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86
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87 #ifdef __cplusplus
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88 } /* end extern "C" */
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89 #endif
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90
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91 #endif /* md5_INCLUDED */
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