+++ /dev/null
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-/* dbus-md5.c md5 implementation (based on L Peter Deutsch implementation)
- *
- * Copyright (C) 2003 Red Hat Inc.
- * Copyright (C) 1999, 2000 Aladdin Enterprises. All rights reserved.
- *
- * This software is provided 'as-is', without any express or implied
- * warranty. In no event will the authors be held liable for any damages
- * arising from the use of this software.
- *
- * Permission is granted to anyone to use this software for any purpose,
- * including commercial applications, and to alter it and redistribute it
- * freely, subject to the following restrictions:
- *
- * 1. The origin of this software must not be misrepresented; you must not
- * claim that you wrote the original software. If you use this software
- * in a product, an acknowledgment in the product documentation would be
- * appreciated but is not required.
- * 2. Altered source versions must be plainly marked as such, and must not be
- * misrepresented as being the original software.
- * 3. This notice may not be removed or altered from any source distribution.
- *
- * L. Peter Deutsch
- * ghost@aladdin.com
- */
-/*
- * Independent implementation of MD5 (RFC 1321).
- *
- * This code implements the MD5 Algorithm defined in RFC 1321.
- * It is derived directly from the text of the RFC and not from the
- * reference implementation.
- *
- * The original and principal author of md5.c is L. Peter Deutsch
- * <ghost@aladdin.com>.
- */
-
-#include <config.h>
-#include "dbus-internals.h"
-#include "dbus-md5.h"
-#include <string.h>
-
-/**
- * @defgroup DBusMD5 MD5 implementation
- * @ingroup DBusInternals
- * @brief MD5 hash
- *
- * Types and functions related to computing MD5 sums.
- */
-
-/**
- * @defgroup DBusMD5Internals MD5 implementation details
- * @ingroup DBusInternals
- * @brief Internals of MD5 implementation.
- *
- * The implementation of MD5 (see http://www.ietf.org/rfc/rfc1321.txt).
- * This MD5 implementation was written by L. Peter Deutsch and
- * is not derived from the RSA reference implementation in the
- * RFC. The version included in D-Bus comes from the Ghostscript
- * 7.05 distribution.
- *
- * @{
- */
-#ifndef DOXYGEN_SHOULD_SKIP_THIS
-/*
- * For reference, here is the program that computed the T values.
- */
-#ifdef COMPUTE_T_VALUES
-#include <math.h>
-int
-main(int argc, char **argv)
-{
- int i;
- for (i = 1; i <= 64; ++i)
- {
- unsigned long v = (unsigned long)(4294967296.0 * fabs(sin((double)i)));
-
- /*
- * The following nonsense is only to avoid compiler warnings about
- * "integer constant is unsigned in ANSI C, signed with -traditional".
- */
- if (v >> 31)
- {
- printf("#define T%d /* 0x%08lx */ (T_MASK ^ 0x%08lx)\n", i,
- v, (unsigned long)(unsigned int)(~v));
- } else {
- printf("#define T%d 0x%08lx\n", i, v);
- }
- }
- return 0;
-}
-#endif /* COMPUTE_T_VALUES */
-/*
- * End of T computation program.
- */
-
-#define T_MASK ((dbus_uint32_t)~0)
-#define T1 /* 0xd76aa478 */ (T_MASK ^ 0x28955b87)
-#define T2 /* 0xe8c7b756 */ (T_MASK ^ 0x173848a9)
-#define T3 0x242070db
-#define T4 /* 0xc1bdceee */ (T_MASK ^ 0x3e423111)
-#define T5 /* 0xf57c0faf */ (T_MASK ^ 0x0a83f050)
-#define T6 0x4787c62a
-#define T7 /* 0xa8304613 */ (T_MASK ^ 0x57cfb9ec)
-#define T8 /* 0xfd469501 */ (T_MASK ^ 0x02b96afe)
-#define T9 0x698098d8
-#define T10 /* 0x8b44f7af */ (T_MASK ^ 0x74bb0850)
-#define T11 /* 0xffff5bb1 */ (T_MASK ^ 0x0000a44e)
-#define T12 /* 0x895cd7be */ (T_MASK ^ 0x76a32841)
-#define T13 0x6b901122
-#define T14 /* 0xfd987193 */ (T_MASK ^ 0x02678e6c)
-#define T15 /* 0xa679438e */ (T_MASK ^ 0x5986bc71)
-#define T16 0x49b40821
-#define T17 /* 0xf61e2562 */ (T_MASK ^ 0x09e1da9d)
-#define T18 /* 0xc040b340 */ (T_MASK ^ 0x3fbf4cbf)
-#define T19 0x265e5a51
-#define T20 /* 0xe9b6c7aa */ (T_MASK ^ 0x16493855)
-#define T21 /* 0xd62f105d */ (T_MASK ^ 0x29d0efa2)
-#define T22 0x02441453
-#define T23 /* 0xd8a1e681 */ (T_MASK ^ 0x275e197e)
-#define T24 /* 0xe7d3fbc8 */ (T_MASK ^ 0x182c0437)
-#define T25 0x21e1cde6
-#define T26 /* 0xc33707d6 */ (T_MASK ^ 0x3cc8f829)
-#define T27 /* 0xf4d50d87 */ (T_MASK ^ 0x0b2af278)
-#define T28 0x455a14ed
-#define T29 /* 0xa9e3e905 */ (T_MASK ^ 0x561c16fa)
-#define T30 /* 0xfcefa3f8 */ (T_MASK ^ 0x03105c07)
-#define T31 0x676f02d9
-#define T32 /* 0x8d2a4c8a */ (T_MASK ^ 0x72d5b375)
-#define T33 /* 0xfffa3942 */ (T_MASK ^ 0x0005c6bd)
-#define T34 /* 0x8771f681 */ (T_MASK ^ 0x788e097e)
-#define T35 0x6d9d6122
-#define T36 /* 0xfde5380c */ (T_MASK ^ 0x021ac7f3)
-#define T37 /* 0xa4beea44 */ (T_MASK ^ 0x5b4115bb)
-#define T38 0x4bdecfa9
-#define T39 /* 0xf6bb4b60 */ (T_MASK ^ 0x0944b49f)
-#define T40 /* 0xbebfbc70 */ (T_MASK ^ 0x4140438f)
-#define T41 0x289b7ec6
-#define T42 /* 0xeaa127fa */ (T_MASK ^ 0x155ed805)
-#define T43 /* 0xd4ef3085 */ (T_MASK ^ 0x2b10cf7a)
-#define T44 0x04881d05
-#define T45 /* 0xd9d4d039 */ (T_MASK ^ 0x262b2fc6)
-#define T46 /* 0xe6db99e5 */ (T_MASK ^ 0x1924661a)
-#define T47 0x1fa27cf8
-#define T48 /* 0xc4ac5665 */ (T_MASK ^ 0x3b53a99a)
-#define T49 /* 0xf4292244 */ (T_MASK ^ 0x0bd6ddbb)
-#define T50 0x432aff97
-#define T51 /* 0xab9423a7 */ (T_MASK ^ 0x546bdc58)
-#define T52 /* 0xfc93a039 */ (T_MASK ^ 0x036c5fc6)
-#define T53 0x655b59c3
-#define T54 /* 0x8f0ccc92 */ (T_MASK ^ 0x70f3336d)
-#define T55 /* 0xffeff47d */ (T_MASK ^ 0x00100b82)
-#define T56 /* 0x85845dd1 */ (T_MASK ^ 0x7a7ba22e)
-#define T57 0x6fa87e4f
-#define T58 /* 0xfe2ce6e0 */ (T_MASK ^ 0x01d3191f)
-#define T59 /* 0xa3014314 */ (T_MASK ^ 0x5cfebceb)
-#define T60 0x4e0811a1
-#define T61 /* 0xf7537e82 */ (T_MASK ^ 0x08ac817d)
-#define T62 /* 0xbd3af235 */ (T_MASK ^ 0x42c50dca)
-#define T63 0x2ad7d2bb
-#define T64 /* 0xeb86d391 */ (T_MASK ^ 0x14792c6e)
-#endif /* !DOXYGEN_SHOULD_SKIP_THIS */
-
-static void
-md5_process(DBusMD5Context *context, const unsigned char *data /*[64]*/)
-{
- dbus_uint32_t
- a = context->abcd[0], b = context->abcd[1],
- c = context->abcd[2], d = context->abcd[3];
- dbus_uint32_t t;
-
-#ifdef WORDS_BIGENDIAN
- /*
- * On big-endian machines, we must arrange the bytes in the right
- * order. (This also works on machines of unknown byte order.)
- */
- dbus_uint32_t X[16];
- const unsigned char *xp = data;
- int i;
-
- for (i = 0; i < 16; ++i, xp += 4)
- X[i] = xp[0] + (xp[1] << 8) + (xp[2] << 16) + (xp[3] << 24);
-
-#else /* !WORDS_BIGENDIAN */
- /*
- * On little-endian machines, we can process properly aligned data
- * without copying it.
- */
- dbus_uint32_t xbuf[16];
- const dbus_uint32_t *X;
-
- if (!((data - (const unsigned char *)0) & 3))
- {
- /* data are properly aligned */
- X = (const dbus_uint32_t *)data;
- }
- else
- {
- /* not aligned */
- memcpy(xbuf, data, 64);
- X = xbuf;
- }
-#endif
-
-#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
-
- /* Round 1. */
- /* Let [abcd k s i] denote the operation
- a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s). */
-#define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
-#define SET(a, b, c, d, k, s, Ti) \
- t = a + F(b,c,d) + X[k] + Ti; \
- a = ROTATE_LEFT(t, s) + b
- /* Do the following 16 operations. */
- SET(a, b, c, d, 0, 7, T1);
- SET(d, a, b, c, 1, 12, T2);
- SET(c, d, a, b, 2, 17, T3);
- SET(b, c, d, a, 3, 22, T4);
- SET(a, b, c, d, 4, 7, T5);
- SET(d, a, b, c, 5, 12, T6);
- SET(c, d, a, b, 6, 17, T7);
- SET(b, c, d, a, 7, 22, T8);
- SET(a, b, c, d, 8, 7, T9);
- SET(d, a, b, c, 9, 12, T10);
- SET(c, d, a, b, 10, 17, T11);
- SET(b, c, d, a, 11, 22, T12);
- SET(a, b, c, d, 12, 7, T13);
- SET(d, a, b, c, 13, 12, T14);
- SET(c, d, a, b, 14, 17, T15);
- SET(b, c, d, a, 15, 22, T16);
-#undef SET
-
- /* Round 2. */
- /* Let [abcd k s i] denote the operation
- a = b + ((a + G(b,c,d) + X[k] + T[i]) <<< s). */
-#define G(x, y, z) (((x) & (z)) | ((y) & ~(z)))
-#define SET(a, b, c, d, k, s, Ti) \
- t = a + G(b,c,d) + X[k] + Ti; \
- a = ROTATE_LEFT(t, s) + b
- /* Do the following 16 operations. */
- SET(a, b, c, d, 1, 5, T17);
- SET(d, a, b, c, 6, 9, T18);
- SET(c, d, a, b, 11, 14, T19);
- SET(b, c, d, a, 0, 20, T20);
- SET(a, b, c, d, 5, 5, T21);
- SET(d, a, b, c, 10, 9, T22);
- SET(c, d, a, b, 15, 14, T23);
- SET(b, c, d, a, 4, 20, T24);
- SET(a, b, c, d, 9, 5, T25);
- SET(d, a, b, c, 14, 9, T26);
- SET(c, d, a, b, 3, 14, T27);
- SET(b, c, d, a, 8, 20, T28);
- SET(a, b, c, d, 13, 5, T29);
- SET(d, a, b, c, 2, 9, T30);
- SET(c, d, a, b, 7, 14, T31);
- SET(b, c, d, a, 12, 20, T32);
-#undef SET
-
- /* Round 3. */
- /* Let [abcd k s t] denote the operation
- a = b + ((a + H(b,c,d) + X[k] + T[i]) <<< s). */
-#define H(x, y, z) ((x) ^ (y) ^ (z))
-#define SET(a, b, c, d, k, s, Ti) \
- t = a + H(b,c,d) + X[k] + Ti; \
- a = ROTATE_LEFT(t, s) + b
- /* Do the following 16 operations. */
- SET(a, b, c, d, 5, 4, T33);
- SET(d, a, b, c, 8, 11, T34);
- SET(c, d, a, b, 11, 16, T35);
- SET(b, c, d, a, 14, 23, T36);
- SET(a, b, c, d, 1, 4, T37);
- SET(d, a, b, c, 4, 11, T38);
- SET(c, d, a, b, 7, 16, T39);
- SET(b, c, d, a, 10, 23, T40);
- SET(a, b, c, d, 13, 4, T41);
- SET(d, a, b, c, 0, 11, T42);
- SET(c, d, a, b, 3, 16, T43);
- SET(b, c, d, a, 6, 23, T44);
- SET(a, b, c, d, 9, 4, T45);
- SET(d, a, b, c, 12, 11, T46);
- SET(c, d, a, b, 15, 16, T47);
- SET(b, c, d, a, 2, 23, T48);
-#undef SET
-
- /* Round 4. */
- /* Let [abcd k s t] denote the operation
- a = b + ((a + I(b,c,d) + X[k] + T[i]) <<< s). */
-#define I(x, y, z) ((y) ^ ((x) | ~(z)))
-#define SET(a, b, c, d, k, s, Ti) \
- t = a + I(b,c,d) + X[k] + Ti; \
- a = ROTATE_LEFT(t, s) + b
- /* Do the following 16 operations. */
- SET(a, b, c, d, 0, 6, T49);
- SET(d, a, b, c, 7, 10, T50);
- SET(c, d, a, b, 14, 15, T51);
- SET(b, c, d, a, 5, 21, T52);
- SET(a, b, c, d, 12, 6, T53);
- SET(d, a, b, c, 3, 10, T54);
- SET(c, d, a, b, 10, 15, T55);
- SET(b, c, d, a, 1, 21, T56);
- SET(a, b, c, d, 8, 6, T57);
- SET(d, a, b, c, 15, 10, T58);
- SET(c, d, a, b, 6, 15, T59);
- SET(b, c, d, a, 13, 21, T60);
- SET(a, b, c, d, 4, 6, T61);
- SET(d, a, b, c, 11, 10, T62);
- SET(c, d, a, b, 2, 15, T63);
- SET(b, c, d, a, 9, 21, T64);
-#undef SET
-
- /* Then perform the following additions. (That is increment each
- of the four registers by the value it had before this block
- was started.) */
- context->abcd[0] += a;
- context->abcd[1] += b;
- context->abcd[2] += c;
- context->abcd[3] += d;
-}
-
-static void
-md5_init (DBusMD5Context *context)
-{
- context->count[0] = context->count[1] = 0;
- context->abcd[0] = 0x67452301;
- context->abcd[1] = /*0xefcdab89*/ T_MASK ^ 0x10325476;
- context->abcd[2] = /*0x98badcfe*/ T_MASK ^ 0x67452301;
- context->abcd[3] = 0x10325476;
-}
-
-static void
-md5_append (DBusMD5Context *context, const unsigned char *data, int nbytes)
-{
- const unsigned char *p = data;
- int left = nbytes;
- int offset = (context->count[0] >> 3) & 63;
- dbus_uint32_t nbits = (dbus_uint32_t)(nbytes << 3);
-
- if (nbytes <= 0)
- return;
-
- /* Update the message length. */
- context->count[1] += nbytes >> 29;
- context->count[0] += nbits;
- if (context->count[0] < nbits)
- context->count[1]++;
-
- /* Process an initial partial block. */
- if (offset)
- {
- int copy = (offset + nbytes > 64 ? 64 - offset : nbytes);
-
- memcpy(context->buf + offset, p, copy);
- if (offset + copy < 64)
- return;
- p += copy;
- left -= copy;
- md5_process(context, context->buf);
- }
-
- /* Process full blocks. */
- for (; left >= 64; p += 64, left -= 64)
- md5_process(context, p);
-
- /* Process a final partial block. */
- if (left)
- memcpy(context->buf, p, left);
-}
-
-static void
-md5_finish (DBusMD5Context *context, unsigned char digest[16])
-{
- static const unsigned char pad[64] = {
- 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
- unsigned char data[8];
- int i;
-
- /* Save the length before padding. */
- for (i = 0; i < 8; ++i)
- data[i] = (unsigned char)(context->count[i >> 2] >> ((i & 3) << 3));
- /* Pad to 56 bytes mod 64. */
- md5_append(context, pad, ((55 - (context->count[0] >> 3)) & 63) + 1);
- /* Append the length. */
- md5_append(context, data, 8);
- for (i = 0; i < 16; ++i)
- digest[i] = (unsigned char)(context->abcd[i >> 2] >> ((i & 3) << 3));
-}
-
-/** @} */ /* End of internals */
-
-/**
- * @addtogroup DBusMD5
- *
- * @{
- */
-
-/**
- * Initializes the MD5 context.
- *
- * @param context an uninitialized context, typically on the stack.
- */
-void
-_dbus_md5_init (DBusMD5Context *context)
-{
- md5_init (context);
-}
-
-
-/**
- * Feeds more data into an existing md5sum computation.
- *
- * @param context the MD5 context
- * @param data the additional data to hash
- */
-void
-_dbus_md5_update (DBusMD5Context *context,
- const DBusString *data)
-{
- unsigned int inputLen;
- unsigned char *input;
-
- _dbus_string_get_const_data (data, (const char**) &input);
- inputLen = _dbus_string_get_length (data);
-
- md5_append (context, input, inputLen);
-}
-
-/**
- * MD5 finalization. Ends an MD5 message-digest operation, writing the
- * the message digest and zeroing the context. The results are
- * returned as a raw 16-byte digest, not as the ascii-hex-digits
- * string form of the digest.
- *
- * @param context the MD5 context
- * @param results string to append the 16-byte MD5 digest to
- * @returns #FALSE if not enough memory to append the digest
- *
- */
-dbus_bool_t
-_dbus_md5_final (DBusMD5Context *context,
- DBusString *results)
-{
- unsigned char digest[16];
-
- md5_finish (context, digest);
-
- if (!_dbus_string_append_len (results, digest, 16))
- return FALSE;
-
- /* some kind of security paranoia, though it seems pointless
- * to me given the nonzeroed stuff flying around
- */
- _DBUS_ZERO(*context);
-
- return TRUE;
-}
-
-/**
- * Computes the ASCII hex-encoded md5sum of the given data and
- * appends it to the output string.
- *
- * @param data input data to be hashed
- * @param ascii_output string to append ASCII md5sum to
- * @returns #FALSE if not enough memory
- */
-dbus_bool_t
-_dbus_md5_compute (const DBusString *data,
- DBusString *ascii_output)
-{
- DBusMD5Context context;
- DBusString digest;
-
- _dbus_md5_init (&context);
-
- _dbus_md5_update (&context, data);
-
- if (!_dbus_string_init (&digest))
- return FALSE;
-
- if (!_dbus_md5_final (&context, &digest))
- goto error;
-
- if (!_dbus_string_hex_encode (&digest, 0, ascii_output,
- _dbus_string_get_length (ascii_output)))
- goto error;
-
- _dbus_string_free (&digest);
-
- return TRUE;
-
- error:
- _dbus_string_free (&digest);
- return FALSE;
-}
-
-/** @} */ /* end of exported functions */
-
-#ifdef DBUS_BUILD_TESTS
-#include "dbus-test.h"
-#include <stdio.h>
-
-static dbus_bool_t
-check_md5_binary (const unsigned char *input,
- int input_len,
- const char *expected)
-{
- DBusString input_str;
- DBusString expected_str;
- DBusString results;
-
- _dbus_string_init_const_len (&input_str, input, input_len);
- _dbus_string_init_const (&expected_str, expected);
-
- if (!_dbus_string_init (&results))
- _dbus_assert_not_reached ("no memory for md5 results");
-
- if (!_dbus_md5_compute (&input_str, &results))
- _dbus_assert_not_reached ("no memory for md5 results");
-
- if (!_dbus_string_equal (&expected_str, &results))
- {
- const char *s;
- _dbus_string_get_const_data (&results, &s);
- _dbus_warn ("Expected hash %s got %s for md5 sum\n",
- expected, s);
- _dbus_string_free (&results);
- return FALSE;
- }
-
- _dbus_string_free (&results);
- return TRUE;
-}
-
-static dbus_bool_t
-check_md5_str (const char *input,
- const char *expected)
-{
- return check_md5_binary (input, strlen (input), expected);
-}
-
-/**
- * @ingroup DBusMD5Internals
- * Unit test for MD5 computation.
- *
- * @returns #TRUE on success.
- */
-dbus_bool_t
-_dbus_md5_test (void)
-{
- unsigned char all_bytes[256];
- int i;
-
- i = 0;
- while (i < 256)
- {
- all_bytes[i] = i;
- ++i;
- }
-
- if (!check_md5_binary (all_bytes, 256,
- "e2c865db4162bed963bfaa9ef6ac18f0"))
- return FALSE;
-
-#define CHECK(input,expected) if (!check_md5_str (input, expected)) return FALSE
-
- CHECK ("", "d41d8cd98f00b204e9800998ecf8427e");
- CHECK ("a", "0cc175b9c0f1b6a831c399e269772661");
- CHECK ("abc", "900150983cd24fb0d6963f7d28e17f72");
- CHECK ("message digest", "f96b697d7cb7938d525a2f31aaf161d0");
- CHECK ("abcdefghijklmnopqrstuvwxyz", "c3fcd3d76192e4007dfb496cca67e13b");
- CHECK ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
- "d174ab98d277d9f5a5611c2c9f419d9f");
- CHECK ("12345678901234567890123456789012345678901234567890123456789012345678901234567890",
- "57edf4a22be3c955ac49da2e2107b67a");
-
- return TRUE;
-}
-
-#endif /* DBUS_BUILD_TESTS */
projects / platform / upstream / dbus.git / commitdiff