hash_md.c

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/*
  +----------------------------------------------------------------------+
  | Copyright (c) The PHP Group                                          |
  +----------------------------------------------------------------------+
  | This source file is subject to version 3.01 of the PHP license,      |
  | that is bundled with this package in the file LICENSE, and is        |
  | available through the world-wide-web at the following url:           |
  | https://www.php.net/license/3_01.txt                                 |
  | If you did not receive a copy of the PHP license and are unable to   |
  | obtain it through the world-wide-web, please send a note to          |
  | license@php.net so we can mail you a copy immediately.               |
  +----------------------------------------------------------------------+
  | Taken from: ext/standard/md5.c                                       |
  +----------------------------------------------------------------------+
*/
 
#include "php_hash.h"
#include "php_hash_md.h"
 
const php_hash_ops php_hash_md5_ops = {
    "md5",
    (php_hash_init_func_t) PHP_MD5InitArgs,
    (php_hash_update_func_t) PHP_MD5Update,
    (php_hash_final_func_t) PHP_MD5Final,
    php_hash_copy,
    php_hash_serialize,
    php_hash_unserialize,
    PHP_MD5_SPEC,
    16,
    64,
    sizeof(PHP_MD5_CTX),
    1
};
 
const php_hash_ops php_hash_md4_ops = {
    "md4",
    (php_hash_init_func_t) PHP_MD4InitArgs,
    (php_hash_update_func_t) PHP_MD4Update,
    (php_hash_final_func_t) PHP_MD4Final,
    php_hash_copy,
    php_hash_serialize,
    php_hash_unserialize,
    PHP_MD4_SPEC,
    16,
    64,
    sizeof(PHP_MD4_CTX),
    1
};
 
static int php_md2_unserialize(php_hashcontext_object *hash, zend_long magic, const zval *zv);
 
const php_hash_ops php_hash_md2_ops = {
    "md2",
    (php_hash_init_func_t) PHP_MD2InitArgs,
    (php_hash_update_func_t) PHP_MD2Update,
    (php_hash_final_func_t) PHP_MD2Final,
    php_hash_copy,
    php_hash_serialize,
    php_md2_unserialize,
    PHP_MD2_SPEC,
    16,
    16,
    sizeof(PHP_MD2_CTX),
    1
};
 
/* MD common stuff */
 
static const unsigned char PADDING[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
};
 
/* {{{ Encode
   Encodes input (uint32_t) into output (unsigned char). Assumes len is
   a multiple of 4.
 */
static void Encode(unsigned char *output, uint32_t *input, unsigned int len)
{
    unsigned int i, j;
 
    for (i = 0, j = 0; j < len; i++, j += 4) {
        output[j] = (unsigned char) (input[i] & 0xff);
        output[j + 1] = (unsigned char) ((input[i] >> 8) & 0xff);
        output[j + 2] = (unsigned char) ((input[i] >> 16) & 0xff);
        output[j + 3] = (unsigned char) ((input[i] >> 24) & 0xff);
    }
}
/* }}} */
 
/* {{{ Decode
   Decodes input (unsigned char) into output (uint32_t). Assumes len is
   a multiple of 4.
 */
static void Decode(uint32_t *output, const unsigned char *input, unsigned int len)
{
    unsigned int i, j;
 
    for (i = 0, j = 0; j < len; i++, j += 4)
        output[i] = ((uint32_t) input[j]) | (((uint32_t) input[j + 1]) << 8) |
            (((uint32_t) input[j + 2]) << 16) | (((uint32_t) input[j + 3]) << 24);
}
/* }}} */
 
/* MD4 */
 
#define MD4_F(x,y,z)            ((z) ^ ((x) & ((y) ^ (z))))
#define MD4_G(x,y,z)            (((x) & ((y) | (z))) | ((y) & (z)))
#define MD4_H(x,y,z)            ((x) ^ (y) ^ (z))
 
#define ROTL32(s,v)             (((v) << (s)) | ((v) >> (32 - (s))))
 
#define MD4_R1(a,b,c,d,k,s)     a = ROTL32(s, a + MD4_F(b,c,d) + x[k])
#define MD4_R2(a,b,c,d,k,s)     a = ROTL32(s, a + MD4_G(b,c,d) + x[k] + 0x5A827999)
#define MD4_R3(a,b,c,d,k,s)     a = ROTL32(s, a + MD4_H(b,c,d) + x[k] + 0x6ED9EBA1)
 
static void MD4Transform(uint32_t state[4], const unsigned char block[64])
{
    uint32_t a = state[0], b = state[1], c = state[2], d = state[3], x[16];
 
    Decode(x, block, 64);
 
    /* Round 1 */
    MD4_R1(a,b,c,d, 0, 3);
    MD4_R1(d,a,b,c, 1, 7);
    MD4_R1(c,d,a,b, 2,11);
    MD4_R1(b,c,d,a, 3,19);
    MD4_R1(a,b,c,d, 4, 3);
    MD4_R1(d,a,b,c, 5, 7);
    MD4_R1(c,d,a,b, 6,11);
    MD4_R1(b,c,d,a, 7,19);
    MD4_R1(a,b,c,d, 8, 3);
    MD4_R1(d,a,b,c, 9, 7);
    MD4_R1(c,d,a,b,10,11);
    MD4_R1(b,c,d,a,11,19);
    MD4_R1(a,b,c,d,12, 3);
    MD4_R1(d,a,b,c,13, 7);
    MD4_R1(c,d,a,b,14,11);
    MD4_R1(b,c,d,a,15,19);
 
    /* Round 2 */
    MD4_R2(a,b,c,d, 0, 3);
    MD4_R2(d,a,b,c, 4, 5);
    MD4_R2(c,d,a,b, 8, 9);
    MD4_R2(b,c,d,a,12,13);
    MD4_R2(a,b,c,d, 1, 3);
    MD4_R2(d,a,b,c, 5, 5);
    MD4_R2(c,d,a,b, 9, 9);
    MD4_R2(b,c,d,a,13,13);
    MD4_R2(a,b,c,d, 2, 3);
    MD4_R2(d,a,b,c, 6, 5);
    MD4_R2(c,d,a,b,10, 9);
    MD4_R2(b,c,d,a,14,13);
    MD4_R2(a,b,c,d, 3, 3);
    MD4_R2(d,a,b,c, 7, 5);
    MD4_R2(c,d,a,b,11, 9);
    MD4_R2(b,c,d,a,15,13);
 
    /* Round 3 */
    MD4_R3(a,b,c,d, 0, 3);
    MD4_R3(d,a,b,c, 8, 9);
    MD4_R3(c,d,a,b, 4,11);
    MD4_R3(b,c,d,a,12,15);
    MD4_R3(a,b,c,d, 2, 3);
    MD4_R3(d,a,b,c,10, 9);
    MD4_R3(c,d,a,b, 6,11);
    MD4_R3(b,c,d,a,14,15);
    MD4_R3(a,b,c,d, 1, 3);
    MD4_R3(d,a,b,c, 9, 9);
    MD4_R3(c,d,a,b, 5,11);
    MD4_R3(b,c,d,a,13,15);
    MD4_R3(a,b,c,d, 3, 3);
    MD4_R3(d,a,b,c,11, 9);
    MD4_R3(c,d,a,b, 7,11);
    MD4_R3(b,c,d,a,15,15);
 
    state[0] += a;
    state[1] += b;
    state[2] += c;
    state[3] += d;
}
 
/* {{{ PHP_MD4InitArgs
 * MD4 initialization. Begins an MD4 operation, writing a new context.
 */
PHP_HASH_API void PHP_MD4InitArgs(PHP_MD4_CTX * context, ZEND_ATTRIBUTE_UNUSED HashTable *args)
{
    context->count[0] = context->count[1] = 0;
    /* Load magic initialization constants.
     */
    context->state[0] = 0x67452301;
    context->state[1] = 0xefcdab89;
    context->state[2] = 0x98badcfe;
    context->state[3] = 0x10325476;
}
/* }}} */
 
/* {{{ PHP_MD4Update
   MD4 block update operation. Continues an MD4 message-digest
   operation, processing another message block, and updating the
   context.
 */
PHP_HASH_API void PHP_MD4Update(PHP_MD4_CTX * context, const unsigned char *input, size_t inputLen)
{
    unsigned int index, partLen;
    size_t i;
 
    /* Compute number of bytes mod 64 */
    index = (unsigned int) ((context->count[0] >> 3) & 0x3F);
 
    /* Update number of bits */
    if ((context->count[0] += ((uint32_t) inputLen << 3))
        < ((uint32_t) inputLen << 3))
        context->count[1]++;
    context->count[1] += (uint32_t) (inputLen >> 29);
 
    partLen = 64 - index;
 
    /* Transform as many times as possible.
     */
    if (inputLen >= partLen) {
        memcpy((unsigned char*) & context->buffer[index], (unsigned char*) input, partLen);
        MD4Transform(context->state, context->buffer);
 
        for (i = partLen; i + 63 < inputLen; i += 64) {
            MD4Transform(context->state, &input[i]);
        }
 
        index = 0;
    } else {
        i = 0;
    }
 
    /* Buffer remaining input */
    memcpy((unsigned char*) & context->buffer[index], (unsigned char*) & input[i], inputLen - i);
}
/* }}} */
 
/* {{{ PHP_MD4Final
   MD4 finalization. Ends an MD4 message-digest operation, writing
   the message digest and zeroizing the context.
 */
PHP_HASH_API void PHP_MD4Final(unsigned char digest[16], PHP_MD4_CTX * context)
{
    unsigned char bits[8];
    unsigned int index, padLen;
 
    /* Save number of bits */
    Encode(bits, context->count, 8);
 
    /* Pad out to 56 mod 64.
     */
    index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
    padLen = (index < 56) ? (56 - index) : (120 - index);
    PHP_MD4Update(context, PADDING, padLen);
 
    /* Append length (before padding) */
    PHP_MD4Update(context, bits, 8);
 
    /* Store state in digest */
    Encode(digest, context->state, 16);
 
    /* Zeroize sensitive information.
     */
    ZEND_SECURE_ZERO((unsigned char*) context, sizeof(*context));
}
/* }}} */
 
/* MD2 */
 
static const unsigned char MD2_S[256] = {
     41,  46,  67, 201, 162, 216, 124,   1,  61,  54,  84, 161, 236, 240,   6,  19,
     98, 167,   5, 243, 192, 199, 115, 140, 152, 147,  43, 217, 188,  76, 130, 202,
     30, 155,  87,  60, 253, 212, 224,  22, 103,  66, 111,  24, 138,  23, 229,  18,
    190,  78, 196, 214, 218, 158, 222,  73, 160, 251, 245, 142, 187,  47, 238, 122,
    169, 104, 121, 145,  21, 178,   7,  63, 148, 194,  16, 137,  11,  34,  95,  33,
    128, 127,  93, 154,  90, 144,  50,  39,  53,  62, 204, 231, 191, 247, 151,   3,
    255,  25,  48, 179,  72, 165, 181, 209, 215,  94, 146,  42, 172,  86, 170, 198,
     79, 184,  56, 210, 150, 164, 125, 182, 118, 252, 107, 226, 156, 116,   4, 241,
     69, 157, 112,  89, 100, 113, 135,  32, 134,  91, 207, 101, 230,  45, 168,   2,
     27,  96,  37, 173, 174, 176, 185, 246,  28,  70,  97, 105,  52,  64, 126,  15,
     85,  71, 163,  35, 221,  81, 175,  58, 195,  92, 249, 206, 186, 197, 234,  38,
     44,  83,  13, 110, 133,  40, 132,   9, 211, 223, 205, 244,  65, 129,  77,  82,
    106, 220,  55, 200, 108, 193, 171, 250,  36, 225, 123,   8,  12, 189, 177,  74,
    120, 136, 149, 139, 227,  99, 232, 109, 233, 203, 213, 254,  59,   0,  29,  57,
    242, 239, 183,  14, 102,  88, 208, 228, 166, 119, 114, 248, 235, 117,  75,  10,
     49,  68,  80, 180, 143, 237,  31,  26, 219, 153, 141,  51, 159,  17, 131,  20 };
 
PHP_HASH_API void PHP_MD2InitArgs(PHP_MD2_CTX *context, ZEND_ATTRIBUTE_UNUSED HashTable *args)
{
    memset(context, 0, sizeof(PHP_MD2_CTX));
}
 
static void MD2_Transform(PHP_MD2_CTX *context, const unsigned char *block)
{
    unsigned char i,j,t = 0;
 
    for(i = 0; i < 16; i++) {
        context->state[16+i] = block[i];
        context->state[32+i] = (context->state[16+i] ^ context->state[i]);
    }
 
    for(i = 0; i < 18; i++) {
        for(j = 0; j < 48; j++) {
            t = context->state[j] = context->state[j] ^ MD2_S[t];
        }
        t += i;
    }
 
    /* Update checksum -- must be after transform to avoid fouling up last message block */
    t = context->checksum[15];
    for(i = 0; i < 16; i++) {
        t = context->checksum[i] ^= MD2_S[block[i] ^ t];
    }
}
 
PHP_HASH_API void PHP_MD2Update(PHP_MD2_CTX *context, const unsigned char *buf, size_t len)
{
    const unsigned char *p = buf, *e = buf + len;
 
    if (context->in_buffer) {
        if (context->in_buffer + len < 16) {
            /* Not enough for block, just pass into buffer */
            memcpy(context->buffer + context->in_buffer, p, len);
            context->in_buffer += (char) len;
            return;
        }
        /* Put buffered data together with inbound for a single block */
        memcpy(context->buffer + context->in_buffer, p, 16 - context->in_buffer);
        MD2_Transform(context, context->buffer);
        p += 16 - context->in_buffer;
        context->in_buffer = 0;
    }
 
    /* Process as many whole blocks as remain */
    while ((p + 16) <= e) {
        MD2_Transform(context, p);
        p += 16;
    }
 
    /* Copy remaining data to buffer */
    if (p < e) {
        memcpy(context->buffer, p, e - p);
        context->in_buffer = (char) (e - p);
    }
}
 
PHP_HASH_API void PHP_MD2Final(unsigned char output[16], PHP_MD2_CTX *context)
{
    memset(context->buffer + context->in_buffer, 16 - context->in_buffer, 16 - context->in_buffer);
    MD2_Transform(context, context->buffer);
    MD2_Transform(context, context->checksum);
 
    memcpy(output, context->state, 16);
}
 
static int php_md2_unserialize(php_hashcontext_object *hash, zend_long magic, const zval *zv)
{
    PHP_MD2_CTX *ctx = (PHP_MD2_CTX *) hash->context;
    int r = FAILURE;
    if (magic == PHP_HASH_SERIALIZE_MAGIC_SPEC
        && (r = php_hash_unserialize_spec(hash, zv, PHP_MD2_SPEC)) == SUCCESS
        && (unsigned char) ctx->in_buffer < sizeof(ctx->buffer)) {
        return SUCCESS;
    } else {
        return r != SUCCESS ? r : -2000;
    }
}