/src/php-src/ext/hash/hash_crc32.c
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1 | | /* |
2 | | +----------------------------------------------------------------------+ |
3 | | | Copyright (c) The PHP Group | |
4 | | +----------------------------------------------------------------------+ |
5 | | | This source file is subject to version 3.01 of the PHP license, | |
6 | | | that is bundled with this package in the file LICENSE, and is | |
7 | | | available through the world-wide-web at the following url: | |
8 | | | https://www.php.net/license/3_01.txt | |
9 | | | If you did not receive a copy of the PHP license and are unable to | |
10 | | | obtain it through the world-wide-web, please send a note to | |
11 | | | license@php.net so we can mail you a copy immediately. | |
12 | | +----------------------------------------------------------------------+ |
13 | | | Authors: Michael Wallner <mike@php.net> | |
14 | | | Sara Golemon <pollita@php.net> | |
15 | | +----------------------------------------------------------------------+ |
16 | | */ |
17 | | |
18 | | #include "php_hash.h" |
19 | | #include "php_hash_crc32.h" |
20 | | #include "php_hash_crc32_tables.h" |
21 | | #include "ext/standard/crc32_x86.h" |
22 | | |
23 | | PHP_HASH_API void PHP_CRC32Init(PHP_CRC32_CTX *context, ZEND_ATTRIBUTE_UNUSED HashTable *args) |
24 | 1.85k | { |
25 | 1.85k | context->state = ~0; |
26 | 1.85k | } |
27 | | |
28 | | PHP_HASH_API void PHP_CRC32Update(PHP_CRC32_CTX *context, const unsigned char *input, size_t len) |
29 | 23 | { |
30 | 23 | size_t i = 0; |
31 | | |
32 | 23 | #if defined(ZEND_INTRIN_SSE4_2_PCLMUL_NATIVE) || defined(ZEND_INTRIN_SSE4_2_PCLMUL_RESOLVER) |
33 | 23 | i += crc32_x86_simd_update(X86_CRC32, &context->state, input, len); |
34 | 23 | #endif |
35 | | |
36 | 82 | for (; i < len; ++i) { |
37 | 59 | context->state = (context->state << 8) ^ crc32_table[(context->state >> 24) ^ (input[i] & 0xff)]; |
38 | 59 | } |
39 | 23 | } |
40 | | |
41 | | PHP_HASH_API void PHP_CRC32BUpdate(PHP_CRC32_CTX *context, const unsigned char *input, size_t len) |
42 | 7 | { |
43 | 7 | size_t i = 0; |
44 | | |
45 | 7 | #if defined(ZEND_INTRIN_SSE4_2_PCLMUL_NATIVE) || defined(ZEND_INTRIN_SSE4_2_PCLMUL_RESOLVER) |
46 | 7 | i += crc32_x86_simd_update(X86_CRC32B, &context->state, input, len); |
47 | 7 | #endif |
48 | | |
49 | 31 | for (; i < len; ++i) { |
50 | 24 | context->state = (context->state >> 8) ^ crc32b_table[(context->state ^ input[i]) & 0xff]; |
51 | 24 | } |
52 | 7 | } |
53 | | |
54 | | PHP_HASH_API void PHP_CRC32CUpdate(PHP_CRC32_CTX *context, const unsigned char *input, size_t len) |
55 | 20 | { |
56 | 20 | size_t i = 0; |
57 | | |
58 | 20 | #if defined(ZEND_INTRIN_SSE4_2_PCLMUL_NATIVE) || defined(ZEND_INTRIN_SSE4_2_PCLMUL_RESOLVER) |
59 | 20 | i += crc32_x86_simd_update(X86_CRC32C, &context->state, input, len); |
60 | 20 | #endif |
61 | | |
62 | 43 | for (; i < len; ++i) { |
63 | 23 | context->state = (context->state >> 8) ^ crc32c_table[(context->state ^ input[i]) & 0xff]; |
64 | 23 | } |
65 | 20 | } |
66 | | |
67 | | PHP_HASH_API void PHP_CRC32LEFinal(unsigned char digest[4], PHP_CRC32_CTX *context) |
68 | 23 | { |
69 | 23 | context->state=~context->state; |
70 | 23 | digest[3] = (unsigned char) ((context->state >> 24) & 0xff); |
71 | 23 | digest[2] = (unsigned char) ((context->state >> 16) & 0xff); |
72 | 23 | digest[1] = (unsigned char) ((context->state >> 8) & 0xff); |
73 | 23 | digest[0] = (unsigned char) (context->state & 0xff); |
74 | 23 | context->state = 0; |
75 | 23 | } |
76 | | |
77 | | PHP_HASH_API void PHP_CRC32BEFinal(unsigned char digest[4], PHP_CRC32_CTX *context) |
78 | 27 | { |
79 | 27 | context->state=~context->state; |
80 | 27 | digest[0] = (unsigned char) ((context->state >> 24) & 0xff); |
81 | 27 | digest[1] = (unsigned char) ((context->state >> 16) & 0xff); |
82 | 27 | digest[2] = (unsigned char) ((context->state >> 8) & 0xff); |
83 | 27 | digest[3] = (unsigned char) (context->state & 0xff); |
84 | 27 | context->state = 0; |
85 | 27 | } |
86 | | |
87 | | PHP_HASH_API zend_result PHP_CRC32Copy(const php_hash_ops *ops, const PHP_CRC32_CTX *orig_context, PHP_CRC32_CTX *copy_context) |
88 | 0 | { |
89 | 0 | copy_context->state = orig_context->state; |
90 | 0 | return SUCCESS; |
91 | 0 | } |
92 | | |
93 | | const php_hash_ops php_hash_crc32_ops = { |
94 | | "crc32", |
95 | | (php_hash_init_func_t) PHP_CRC32Init, |
96 | | (php_hash_update_func_t) PHP_CRC32Update, |
97 | | (php_hash_final_func_t) PHP_CRC32LEFinal, |
98 | | (php_hash_copy_func_t) PHP_CRC32Copy, |
99 | | php_hash_serialize, |
100 | | php_hash_unserialize, |
101 | | PHP_CRC32_SPEC, |
102 | | 4, /* what to say here? */ |
103 | | 4, |
104 | | sizeof(PHP_CRC32_CTX), |
105 | | 0 |
106 | | }; |
107 | | |
108 | | const php_hash_ops php_hash_crc32b_ops = { |
109 | | "crc32b", |
110 | | (php_hash_init_func_t) PHP_CRC32Init, |
111 | | (php_hash_update_func_t) PHP_CRC32BUpdate, |
112 | | (php_hash_final_func_t) PHP_CRC32BEFinal, |
113 | | (php_hash_copy_func_t) PHP_CRC32Copy, |
114 | | php_hash_serialize, |
115 | | php_hash_unserialize, |
116 | | PHP_CRC32_SPEC, |
117 | | 4, /* what to say here? */ |
118 | | 4, |
119 | | sizeof(PHP_CRC32_CTX), |
120 | | 0 |
121 | | }; |
122 | | |
123 | | const php_hash_ops php_hash_crc32c_ops = { |
124 | | "crc32c", |
125 | | (php_hash_init_func_t) PHP_CRC32Init, |
126 | | (php_hash_update_func_t) PHP_CRC32CUpdate, |
127 | | (php_hash_final_func_t) PHP_CRC32BEFinal, |
128 | | (php_hash_copy_func_t) PHP_CRC32Copy, |
129 | | php_hash_serialize, |
130 | | php_hash_unserialize, |
131 | | PHP_CRC32_SPEC, |
132 | | 4, /* what to say here? */ |
133 | | 4, |
134 | | sizeof(PHP_CRC32_CTX), |
135 | | 0 |
136 | | }; |