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00010 #include "syncml.h"
00011 #include "syncml_internals.h"
00012 #include "sml_error_internals.h"
00013
00014 #include <string.h>
00015 #include <stdint.h>
00016 #include "sml_md5.h"
00017 #include <glib.h>
00018
00019 typedef struct SmlMD5Context {
00020 uint32_t buf[4];
00021 uint32_t bits[2];
00022 unsigned char in[64];
00023 int doByteReverse;
00024 } SmlMD5Context;
00025
00026 void smlMD5Init(SmlMD5Context *ctx);
00027 void smlMD5Update(SmlMD5Context *ctx, const char *buf, uint32_t len);
00028 void smlMD5Final (SmlMD5Context *ctx, unsigned char digest[16]);
00029 static void smlMD5Transform(uint32_t buf[4], const uint32_t in[16]);
00030
00031 static gint _ie = 0x44332211;
00032 static union _endian { gint i; gchar b[4]; } *_endian = (union _endian *)&_ie;
00033 #define IS_BIG_ENDIAN() (_endian->b[0] == '\x44')
00034 #define IS_LITTLE_ENDIAN() (_endian->b[0] == '\x11')
00035
00036
00037
00038
00039 #define F1(x, y, z) (z ^ (x & (y ^ z)))
00040 #define F2(x, y, z) F1(z, x, y)
00041 #define F3(x, y, z) (x ^ y ^ z)
00042 #define F4(x, y, z) (y ^ (x | ~z))
00043
00044
00045 #define MD5STEP(f, w, x, y, z, data, s) ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
00046
00047
00048
00049
00050 static void
00051 _byte_reverse (guchar *buf, guint32 longs)
00052 {
00053 guint32 t;
00054 do {
00055 t = (guint32) ((guint32) buf[3] << 8 | buf[2]) << 16 |
00056 ((guint32) buf[1] << 8 | buf[0]);
00057 *(guint32 *) buf = t;
00058 buf += 4;
00059 } while (--longs);
00060 }
00061
00062 void smlMD5Init(SmlMD5Context *ctx)
00063 {
00064 ctx->buf[0] = 0x67452301;
00065 ctx->buf[1] = 0xefcdab89;
00066 ctx->buf[2] = 0x98badcfe;
00067 ctx->buf[3] = 0x10325476;
00068
00069 ctx->bits[0] = 0;
00070 ctx->bits[1] = 0;
00071
00072 if (IS_BIG_ENDIAN())
00073 ctx->doByteReverse = 1;
00074 else
00075 ctx->doByteReverse = 0;
00076 }
00077
00078 void smlMD5Update(SmlMD5Context *ctx, const char *buf, uint32_t len)
00079 {
00080 guint32 t;
00081
00082
00083
00084 t = ctx->bits[0];
00085 if ((ctx->bits[0] = t + ((guint32) len << 3)) < t)
00086 ctx->bits[1]++;
00087 ctx->bits[1] += len >> 29;
00088
00089 t = (t >> 3) & 0x3f;
00090
00091
00092
00093 if (t) {
00094 guchar *p = (guchar *) ctx->in + t;
00095
00096 t = 64 - t;
00097 if (len < t) {
00098 memcpy (p, buf, len);
00099 return;
00100 }
00101 memcpy (p, buf, t);
00102 if (ctx->doByteReverse)
00103 _byte_reverse (ctx->in, 16);
00104 smlMD5Transform (ctx->buf, (guint32 *) ctx->in);
00105 buf += t;
00106 len -= t;
00107 }
00108
00109
00110 while (len >= 64) {
00111 memcpy (ctx->in, buf, 64);
00112 if (ctx->doByteReverse)
00113 _byte_reverse (ctx->in, 16);
00114 smlMD5Transform (ctx->buf, (guint32 *) ctx->in);
00115 buf += 64;
00116 len -= 64;
00117 }
00118
00119
00120
00121 memcpy (ctx->in, buf, len);
00122 }
00123
00124 void smlMD5Final (SmlMD5Context *ctx, unsigned char digest[16])
00125 {
00126 guint32 count;
00127 guchar *p;
00128
00129
00130 count = (ctx->bits[0] >> 3) & 0x3F;
00131
00132
00133
00134 p = ctx->in + count;
00135 *p++ = 0x80;
00136
00137
00138 count = 64 - 1 - count;
00139
00140
00141 if (count < 8) {
00142
00143 memset (p, 0, count);
00144 if (ctx->doByteReverse)
00145 _byte_reverse (ctx->in, 16);
00146 smlMD5Transform (ctx->buf, (guint32 *) ctx->in);
00147
00148
00149 memset (ctx->in, 0, 56);
00150 } else {
00151
00152 memset (p, 0, count - 8);
00153 }
00154 if (ctx->doByteReverse)
00155 _byte_reverse (ctx->in, 14);
00156
00157
00158 ((guint32 *) ctx->in)[14] = ctx->bits[0];
00159 ((guint32 *) ctx->in)[15] = ctx->bits[1];
00160
00161 smlMD5Transform (ctx->buf, (guint32 *) ctx->in);
00162 if (ctx->doByteReverse)
00163 _byte_reverse ((guchar *) ctx->buf, 4);
00164 memcpy (digest, ctx->buf, 16);
00165 }
00166
00167 static void smlMD5Transform(uint32_t buf[4], const uint32_t in[16])
00168 {
00169 register guint32 a, b, c, d;
00170
00171 a = buf[0];
00172 b = buf[1];
00173 c = buf[2];
00174 d = buf[3];
00175
00176 MD5STEP (F1, a, b, c, d, in[0] + 0xd76aa478, 7);
00177 MD5STEP (F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
00178 MD5STEP (F1, c, d, a, b, in[2] + 0x242070db, 17);
00179 MD5STEP (F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
00180 MD5STEP (F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
00181 MD5STEP (F1, d, a, b, c, in[5] + 0x4787c62a, 12);
00182 MD5STEP (F1, c, d, a, b, in[6] + 0xa8304613, 17);
00183 MD5STEP (F1, b, c, d, a, in[7] + 0xfd469501, 22);
00184 MD5STEP (F1, a, b, c, d, in[8] + 0x698098d8, 7);
00185 MD5STEP (F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
00186 MD5STEP (F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
00187 MD5STEP (F1, b, c, d, a, in[11] + 0x895cd7be, 22);
00188 MD5STEP (F1, a, b, c, d, in[12] + 0x6b901122, 7);
00189 MD5STEP (F1, d, a, b, c, in[13] + 0xfd987193, 12);
00190 MD5STEP (F1, c, d, a, b, in[14] + 0xa679438e, 17);
00191 MD5STEP (F1, b, c, d, a, in[15] + 0x49b40821, 22);
00192
00193 MD5STEP (F2, a, b, c, d, in[1] + 0xf61e2562, 5);
00194 MD5STEP (F2, d, a, b, c, in[6] + 0xc040b340, 9);
00195 MD5STEP (F2, c, d, a, b, in[11] + 0x265e5a51, 14);
00196 MD5STEP (F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
00197 MD5STEP (F2, a, b, c, d, in[5] + 0xd62f105d, 5);
00198 MD5STEP (F2, d, a, b, c, in[10] + 0x02441453, 9);
00199 MD5STEP (F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
00200 MD5STEP (F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
00201 MD5STEP (F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
00202 MD5STEP (F2, d, a, b, c, in[14] + 0xc33707d6, 9);
00203 MD5STEP (F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
00204 MD5STEP (F2, b, c, d, a, in[8] + 0x455a14ed, 20);
00205 MD5STEP (F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
00206 MD5STEP (F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
00207 MD5STEP (F2, c, d, a, b, in[7] + 0x676f02d9, 14);
00208 MD5STEP (F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
00209
00210 MD5STEP (F3, a, b, c, d, in[5] + 0xfffa3942, 4);
00211 MD5STEP (F3, d, a, b, c, in[8] + 0x8771f681, 11);
00212 MD5STEP (F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
00213 MD5STEP (F3, b, c, d, a, in[14] + 0xfde5380c, 23);
00214 MD5STEP (F3, a, b, c, d, in[1] + 0xa4beea44, 4);
00215 MD5STEP (F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
00216 MD5STEP (F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
00217 MD5STEP (F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
00218 MD5STEP (F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
00219 MD5STEP (F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
00220 MD5STEP (F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
00221 MD5STEP (F3, b, c, d, a, in[6] + 0x04881d05, 23);
00222 MD5STEP (F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
00223 MD5STEP (F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
00224 MD5STEP (F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
00225 MD5STEP (F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
00226
00227 MD5STEP (F4, a, b, c, d, in[0] + 0xf4292244, 6);
00228 MD5STEP (F4, d, a, b, c, in[7] + 0x432aff97, 10);
00229 MD5STEP (F4, c, d, a, b, in[14] + 0xab9423a7, 15);
00230 MD5STEP (F4, b, c, d, a, in[5] + 0xfc93a039, 21);
00231 MD5STEP (F4, a, b, c, d, in[12] + 0x655b59c3, 6);
00232 MD5STEP (F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
00233 MD5STEP (F4, c, d, a, b, in[10] + 0xffeff47d, 15);
00234 MD5STEP (F4, b, c, d, a, in[1] + 0x85845dd1, 21);
00235 MD5STEP (F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
00236 MD5STEP (F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
00237 MD5STEP (F4, c, d, a, b, in[6] + 0xa3014314, 15);
00238 MD5STEP (F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
00239 MD5STEP (F4, a, b, c, d, in[4] + 0xf7537e82, 6);
00240 MD5STEP (F4, d, a, b, c, in[11] + 0xbd3af235, 10);
00241 MD5STEP (F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
00242 MD5STEP (F4, b, c, d, a, in[9] + 0xeb86d391, 21);
00243
00244 buf[0] += a;
00245 buf[1] += b;
00246 buf[2] += c;
00247 buf[3] += d;
00248 }
00249
00250 void smlMD5GetDigest (const char *buffer, int buffer_size, unsigned char digest[16])
00251 {
00252 SmlMD5Context ctx;
00253
00254 smlMD5Init (&ctx);
00255 smlMD5Update (&ctx, buffer, buffer_size);
00256 smlMD5Final (&ctx, digest);
00257
00258 }
00259
00260 char *smlMD5ToString(unsigned char digest[16], SmlError **error)
00261 {
00262 CHECK_ERROR_REF
00263 char *string = smlTryMalloc0(33, error);
00264 if (!string)
00265 return NULL;
00266
00267 snprintf(string, 33, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", digest[0], digest[1], digest[2], digest[3], digest[4], digest[5], digest[6], digest[7], digest[8], digest[9], digest[10], digest[11], digest[12], digest[13], digest[14], digest[15]);
00268 return string;
00269 }