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php-src/ext/standard/sha1.c
Peter Kokot 92ac598aab Remove local variables 
This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly used by Vim and Emacs editors
yet with recent changes the once working definitions don't work
anymore in Vim without custom plugins or additional configuration.
Neither are these settings synced across the PHP code base.

A simpler and better approach is EditorConfig and fixing code
using some code style fixing tools in the future instead.

This patch also removes the so called modelines for Vim. Modelines
allow Vim editor specifically to set some editor configuration such as
syntax highlighting, indentation style and tab width to be set in the
first line or the last 5 lines per file basis. Since the php test
files have syntax highlighting already set in most editors properly and
EditorConfig takes care of the indentation settings, this patch removes
these as well for the Vim 6.0 and newer versions.

With the removal of local variables for certain editors such as
Emacs and Vim, the footer is also probably not needed anymore when
creating extensions using ext_skel.php script.

Additionally, Vim modelines for setting php syntax and some editor
settings has been removed from some *.phpt files.  All these are
mostly not relevant for phpt files neither work properly in the
middle of the file.
2019-02-03 21:03:00 +01:00

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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| 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: |
| http://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. |
+----------------------------------------------------------------------+
| Author: Stefan Esser <sesser@php.net> |
+----------------------------------------------------------------------+
*/
#include "php.h"
/* This code is heavily based on the PHP md5 implementation */
#include "sha1.h"
#include "md5.h"
PHPAPI void make_sha1_digest(char *sha1str, unsigned char *digest)
{
make_digest_ex(sha1str, digest, 20);
}
/* {{{ proto string sha1(string str [, bool raw_output])
Calculate the sha1 hash of a string */
PHP_FUNCTION(sha1)
{
zend_string *arg;
zend_bool raw_output = 0;
PHP_SHA1_CTX context;
unsigned char digest[20];
ZEND_PARSE_PARAMETERS_START(1, 2)
Z_PARAM_STR(arg)
Z_PARAM_OPTIONAL
Z_PARAM_BOOL(raw_output)
ZEND_PARSE_PARAMETERS_END();
PHP_SHA1Init(&context);
PHP_SHA1Update(&context, (unsigned char *) ZSTR_VAL(arg), ZSTR_LEN(arg));
PHP_SHA1Final(digest, &context);
if (raw_output) {
RETURN_STRINGL((char *) digest, 20);
} else {
RETVAL_NEW_STR(zend_string_alloc(40, 0));
make_digest_ex(Z_STRVAL_P(return_value), digest, 20);
}
}
/* }}} */
/* {{{ proto string sha1_file(string filename [, bool raw_output])
Calculate the sha1 hash of given filename */
PHP_FUNCTION(sha1_file)
{
char *arg;
size_t arg_len;
zend_bool raw_output = 0;
unsigned char buf[1024];
unsigned char digest[20];
PHP_SHA1_CTX context;
size_t n;
php_stream *stream;
ZEND_PARSE_PARAMETERS_START(1, 2)
Z_PARAM_PATH(arg, arg_len)
Z_PARAM_OPTIONAL
Z_PARAM_BOOL(raw_output)
ZEND_PARSE_PARAMETERS_END();
stream = php_stream_open_wrapper(arg, "rb", REPORT_ERRORS, NULL);
if (!stream) {
RETURN_FALSE;
}
PHP_SHA1Init(&context);
while ((n = php_stream_read(stream, (char *) buf, sizeof(buf))) > 0) {
PHP_SHA1Update(&context, buf, n);
}
PHP_SHA1Final(digest, &context);
php_stream_close(stream);
if (raw_output) {
RETURN_STRINGL((char *) digest, 20);
} else {
RETVAL_NEW_STR(zend_string_alloc(40, 0));
make_digest_ex(Z_STRVAL_P(return_value), digest, 20);
}
}
/* }}} */
static void SHA1Transform(uint32_t[5], const unsigned char[64]);
static void SHA1Encode(unsigned char *, uint32_t *, unsigned int);
static void SHA1Decode(uint32_t *, const unsigned char *, unsigned int);
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
};
/* F, G, H and I are basic SHA1 functions.
*/
#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
#define G(x, y, z) ((x) ^ (y) ^ (z))
#define H(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
#define I(x, y, z) ((x) ^ (y) ^ (z))
/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
/* W[i]
*/
#define W(i) ( tmp=x[(i-3)&15]^x[(i-8)&15]^x[(i-14)&15]^x[i&15], \
(x[i&15]=ROTATE_LEFT(tmp, 1)) )
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
*/
#define FF(a, b, c, d, e, w) { \
(e) += F ((b), (c), (d)) + (w) + (uint32_t)(0x5A827999); \
(e) += ROTATE_LEFT ((a), 5); \
(b) = ROTATE_LEFT((b), 30); \
}
#define GG(a, b, c, d, e, w) { \
(e) += G ((b), (c), (d)) + (w) + (uint32_t)(0x6ED9EBA1); \
(e) += ROTATE_LEFT ((a), 5); \
(b) = ROTATE_LEFT((b), 30); \
}
#define HH(a, b, c, d, e, w) { \
(e) += H ((b), (c), (d)) + (w) + (uint32_t)(0x8F1BBCDC); \
(e) += ROTATE_LEFT ((a), 5); \
(b) = ROTATE_LEFT((b), 30); \
}
#define II(a, b, c, d, e, w) { \
(e) += I ((b), (c), (d)) + (w) + (uint32_t)(0xCA62C1D6); \
(e) += ROTATE_LEFT ((a), 5); \
(b) = ROTATE_LEFT((b), 30); \
}
/* {{{ PHP_SHA1Init
* SHA1 initialization. Begins an SHA1 operation, writing a new context.
*/
PHPAPI void PHP_SHA1Init(PHP_SHA1_CTX * context)
{
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;
context->state[4] = 0xc3d2e1f0;
}
/* }}} */
/* {{{ PHP_SHA1Update
SHA1 block update operation. Continues an SHA1 message-digest
operation, processing another message block, and updating the
context.
*/
PHPAPI void PHP_SHA1Update(PHP_SHA1_CTX * context, const unsigned char *input,
size_t inputLen)
{
unsigned int i, index, partLen;
/* 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);
SHA1Transform(context->state, context->buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
SHA1Transform(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_SHA1Final
SHA1 finalization. Ends an SHA1 message-digest operation, writing the
the message digest and zeroizing the context.
*/
PHPAPI void PHP_SHA1Final(unsigned char digest[20], PHP_SHA1_CTX * context)
{
unsigned char bits[8];
unsigned int index, padLen;
/* Save number of bits */
bits[7] = context->count[0] & 0xFF;
bits[6] = (context->count[0] >> 8) & 0xFF;
bits[5] = (context->count[0] >> 16) & 0xFF;
bits[4] = (context->count[0] >> 24) & 0xFF;
bits[3] = context->count[1] & 0xFF;
bits[2] = (context->count[1] >> 8) & 0xFF;
bits[1] = (context->count[1] >> 16) & 0xFF;
bits[0] = (context->count[1] >> 24) & 0xFF;
/* Pad out to 56 mod 64.
*/
index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
PHP_SHA1Update(context, PADDING, padLen);
/* Append length (before padding) */
PHP_SHA1Update(context, bits, 8);
/* Store state in digest */
SHA1Encode(digest, context->state, 20);
/* Zeroize sensitive information.
*/
memset((unsigned char*) context, 0, sizeof(*context));
}
/* }}} */
/* {{{ SHA1Transform
* SHA1 basic transformation. Transforms state based on block.
*/
static void SHA1Transform(state, block)
uint32_t state[5];
const unsigned char block[64];
{
uint32_t a = state[0], b = state[1], c = state[2];
uint32_t d = state[3], e = state[4], x[16], tmp;
SHA1Decode(x, block, 64);
/* Round 1 */
FF(a, b, c, d, e, x[0]); /* 1 */
FF(e, a, b, c, d, x[1]); /* 2 */
FF(d, e, a, b, c, x[2]); /* 3 */
FF(c, d, e, a, b, x[3]); /* 4 */
FF(b, c, d, e, a, x[4]); /* 5 */
FF(a, b, c, d, e, x[5]); /* 6 */
FF(e, a, b, c, d, x[6]); /* 7 */
FF(d, e, a, b, c, x[7]); /* 8 */
FF(c, d, e, a, b, x[8]); /* 9 */
FF(b, c, d, e, a, x[9]); /* 10 */
FF(a, b, c, d, e, x[10]); /* 11 */
FF(e, a, b, c, d, x[11]); /* 12 */
FF(d, e, a, b, c, x[12]); /* 13 */
FF(c, d, e, a, b, x[13]); /* 14 */
FF(b, c, d, e, a, x[14]); /* 15 */
FF(a, b, c, d, e, x[15]); /* 16 */
FF(e, a, b, c, d, W(16)); /* 17 */
FF(d, e, a, b, c, W(17)); /* 18 */
FF(c, d, e, a, b, W(18)); /* 19 */
FF(b, c, d, e, a, W(19)); /* 20 */
/* Round 2 */
GG(a, b, c, d, e, W(20)); /* 21 */
GG(e, a, b, c, d, W(21)); /* 22 */
GG(d, e, a, b, c, W(22)); /* 23 */
GG(c, d, e, a, b, W(23)); /* 24 */
GG(b, c, d, e, a, W(24)); /* 25 */
GG(a, b, c, d, e, W(25)); /* 26 */
GG(e, a, b, c, d, W(26)); /* 27 */
GG(d, e, a, b, c, W(27)); /* 28 */
GG(c, d, e, a, b, W(28)); /* 29 */
GG(b, c, d, e, a, W(29)); /* 30 */
GG(a, b, c, d, e, W(30)); /* 31 */
GG(e, a, b, c, d, W(31)); /* 32 */
GG(d, e, a, b, c, W(32)); /* 33 */
GG(c, d, e, a, b, W(33)); /* 34 */
GG(b, c, d, e, a, W(34)); /* 35 */
GG(a, b, c, d, e, W(35)); /* 36 */
GG(e, a, b, c, d, W(36)); /* 37 */
GG(d, e, a, b, c, W(37)); /* 38 */
GG(c, d, e, a, b, W(38)); /* 39 */
GG(b, c, d, e, a, W(39)); /* 40 */
/* Round 3 */
HH(a, b, c, d, e, W(40)); /* 41 */
HH(e, a, b, c, d, W(41)); /* 42 */
HH(d, e, a, b, c, W(42)); /* 43 */
HH(c, d, e, a, b, W(43)); /* 44 */
HH(b, c, d, e, a, W(44)); /* 45 */
HH(a, b, c, d, e, W(45)); /* 46 */
HH(e, a, b, c, d, W(46)); /* 47 */
HH(d, e, a, b, c, W(47)); /* 48 */
HH(c, d, e, a, b, W(48)); /* 49 */
HH(b, c, d, e, a, W(49)); /* 50 */
HH(a, b, c, d, e, W(50)); /* 51 */
HH(e, a, b, c, d, W(51)); /* 52 */
HH(d, e, a, b, c, W(52)); /* 53 */
HH(c, d, e, a, b, W(53)); /* 54 */
HH(b, c, d, e, a, W(54)); /* 55 */
HH(a, b, c, d, e, W(55)); /* 56 */
HH(e, a, b, c, d, W(56)); /* 57 */
HH(d, e, a, b, c, W(57)); /* 58 */
HH(c, d, e, a, b, W(58)); /* 59 */
HH(b, c, d, e, a, W(59)); /* 60 */
/* Round 4 */
II(a, b, c, d, e, W(60)); /* 61 */
II(e, a, b, c, d, W(61)); /* 62 */
II(d, e, a, b, c, W(62)); /* 63 */
II(c, d, e, a, b, W(63)); /* 64 */
II(b, c, d, e, a, W(64)); /* 65 */
II(a, b, c, d, e, W(65)); /* 66 */
II(e, a, b, c, d, W(66)); /* 67 */
II(d, e, a, b, c, W(67)); /* 68 */
II(c, d, e, a, b, W(68)); /* 69 */
II(b, c, d, e, a, W(69)); /* 70 */
II(a, b, c, d, e, W(70)); /* 71 */
II(e, a, b, c, d, W(71)); /* 72 */
II(d, e, a, b, c, W(72)); /* 73 */
II(c, d, e, a, b, W(73)); /* 74 */
II(b, c, d, e, a, W(74)); /* 75 */
II(a, b, c, d, e, W(75)); /* 76 */
II(e, a, b, c, d, W(76)); /* 77 */
II(d, e, a, b, c, W(77)); /* 78 */
II(c, d, e, a, b, W(78)); /* 79 */
II(b, c, d, e, a, W(79)); /* 80 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
/* Zeroize sensitive information. */
memset((unsigned char*) x, 0, sizeof(x));
}
/* }}} */
/* {{{ SHA1Encode
Encodes input (uint32_t) into output (unsigned char). Assumes len is
a multiple of 4.
*/
static void SHA1Encode(output, input, len)
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] >> 24) & 0xff);
output[j + 1] = (unsigned char) ((input[i] >> 16) & 0xff);
output[j + 2] = (unsigned char) ((input[i] >> 8) & 0xff);
output[j + 3] = (unsigned char) (input[i] & 0xff);
}
}
/* }}} */
/* {{{ SHA1Decode
Decodes input (unsigned char) into output (uint32_t). Assumes len is
a multiple of 4.
*/
static void SHA1Decode(output, input, len)
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 + 3]) | (((uint32_t) input[j + 2]) << 8) |
(((uint32_t) input[j + 1]) << 16) | (((uint32_t) input[j]) << 24);
}
/* }}} */
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