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openssl/crypto/sha/sha_locl.h
David Woodhouse 09977dd095 RT4347: Fix GCC unused-value warnings with HOST_c2l() 
The HOST_c2l() macro assigns the value to the specified variable, but also
evaluates to the same value. Which we ignore, triggering a warning.

To fix this, just cast it to void like we did in commit 08e553644
("Fix some clang warnings.") for a bunch of other instances.

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Andy Polyakov <appro@openssl.org>
2016-03-01 12:10:18 -05:00

473 lines
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C
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdlib.h>
#include <string.h>
#include <openssl/opensslconf.h>
#include <openssl/sha.h>
#define DATA_ORDER_IS_BIG_ENDIAN
#define HASH_LONG SHA_LONG
#define HASH_CTX SHA_CTX
#define HASH_CBLOCK SHA_CBLOCK
#define HASH_MAKE_STRING(c,s) do { \
unsigned long ll; \
ll=(c)->h0; (void)HOST_l2c(ll,(s)); \
ll=(c)->h1; (void)HOST_l2c(ll,(s)); \
ll=(c)->h2; (void)HOST_l2c(ll,(s)); \
ll=(c)->h3; (void)HOST_l2c(ll,(s)); \
ll=(c)->h4; (void)HOST_l2c(ll,(s)); \
} while (0)
#define HASH_UPDATE SHA1_Update
#define HASH_TRANSFORM SHA1_Transform
#define HASH_FINAL SHA1_Final
#define HASH_INIT SHA1_Init
#define HASH_BLOCK_DATA_ORDER sha1_block_data_order
#define Xupdate(a,ix,ia,ib,ic,id) ( (a)=(ia^ib^ic^id), \
ix=(a)=ROTATE((a),1) \
)
#ifndef SHA1_ASM
static void sha1_block_data_order(SHA_CTX *c, const void *p, size_t num);
#else
void sha1_block_data_order(SHA_CTX *c, const void *p, size_t num);
#endif
#include "internal/md32_common.h"
#define INIT_DATA_h0 0x67452301UL
#define INIT_DATA_h1 0xefcdab89UL
#define INIT_DATA_h2 0x98badcfeUL
#define INIT_DATA_h3 0x10325476UL
#define INIT_DATA_h4 0xc3d2e1f0UL
int HASH_INIT(SHA_CTX *c)
{
memset(c, 0, sizeof(*c));
c->h0 = INIT_DATA_h0;
c->h1 = INIT_DATA_h1;
c->h2 = INIT_DATA_h2;
c->h3 = INIT_DATA_h3;
c->h4 = INIT_DATA_h4;
return 1;
}
#define K_00_19 0x5a827999UL
#define K_20_39 0x6ed9eba1UL
#define K_40_59 0x8f1bbcdcUL
#define K_60_79 0xca62c1d6UL
/*
* As pointed out by Wei Dai <weidai@eskimo.com>, F() below can be simplified
* to the code in F_00_19. Wei attributes these optimisations to Peter
* Gutmann's SHS code, and he attributes it to Rich Schroeppel. #define
* F(x,y,z) (((x) & (y)) | ((~(x)) & (z))) I've just become aware of another
* tweak to be made, again from Wei Dai, in F_40_59, (x&a)|(y&a) -> (x|y)&a
*/
#define F_00_19(b,c,d) ((((c) ^ (d)) & (b)) ^ (d))
#define F_20_39(b,c,d) ((b) ^ (c) ^ (d))
#define F_40_59(b,c,d) (((b) & (c)) | (((b)|(c)) & (d)))
#define F_60_79(b,c,d) F_20_39(b,c,d)
#ifndef OPENSSL_SMALL_FOOTPRINT
# define BODY_00_15(i,a,b,c,d,e,f,xi) \
(f)=xi+(e)+K_00_19+ROTATE((a),5)+F_00_19((b),(c),(d)); \
(b)=ROTATE((b),30);
# define BODY_16_19(i,a,b,c,d,e,f,xi,xa,xb,xc,xd) \
Xupdate(f,xi,xa,xb,xc,xd); \
(f)+=(e)+K_00_19+ROTATE((a),5)+F_00_19((b),(c),(d)); \
(b)=ROTATE((b),30);
# define BODY_20_31(i,a,b,c,d,e,f,xi,xa,xb,xc,xd) \
Xupdate(f,xi,xa,xb,xc,xd); \
(f)+=(e)+K_20_39+ROTATE((a),5)+F_20_39((b),(c),(d)); \
(b)=ROTATE((b),30);
# define BODY_32_39(i,a,b,c,d,e,f,xa,xb,xc,xd) \
Xupdate(f,xa,xa,xb,xc,xd); \
(f)+=(e)+K_20_39+ROTATE((a),5)+F_20_39((b),(c),(d)); \
(b)=ROTATE((b),30);
# define BODY_40_59(i,a,b,c,d,e,f,xa,xb,xc,xd) \
Xupdate(f,xa,xa,xb,xc,xd); \
(f)+=(e)+K_40_59+ROTATE((a),5)+F_40_59((b),(c),(d)); \
(b)=ROTATE((b),30);
# define BODY_60_79(i,a,b,c,d,e,f,xa,xb,xc,xd) \
Xupdate(f,xa,xa,xb,xc,xd); \
(f)=xa+(e)+K_60_79+ROTATE((a),5)+F_60_79((b),(c),(d)); \
(b)=ROTATE((b),30);
# ifdef X
# undef X
# endif
# ifndef MD32_XARRAY
/*
* Originally X was an array. As it's automatic it's natural
* to expect RISC compiler to accommodate at least part of it in
* the register bank, isn't it? Unfortunately not all compilers
* "find" this expectation reasonable:-( On order to make such
* compilers generate better code I replace X[] with a bunch of
* X0, X1, etc. See the function body below...
* <appro@fy.chalmers.se>
*/
# define X(i) XX##i
# else
/*
* However! Some compilers (most notably HP C) get overwhelmed by
* that many local variables so that we have to have the way to
* fall down to the original behavior.
*/
# define X(i) XX[i]
# endif
# if !defined(SHA1_ASM)
static void HASH_BLOCK_DATA_ORDER(SHA_CTX *c, const void *p, size_t num)
{
const unsigned char *data = p;
register unsigned MD32_REG_T A, B, C, D, E, T, l;
# ifndef MD32_XARRAY
unsigned MD32_REG_T XX0, XX1, XX2, XX3, XX4, XX5, XX6, XX7,
XX8, XX9, XX10, XX11, XX12, XX13, XX14, XX15;
# else
SHA_LONG XX[16];
# endif
A = c->h0;
B = c->h1;
C = c->h2;
D = c->h3;
E = c->h4;
for (;;) {
const union {
long one;
char little;
} is_endian = {
1
};
if (!is_endian.little && sizeof(SHA_LONG) == 4
&& ((size_t)p % 4) == 0) {
const SHA_LONG *W = (const SHA_LONG *)data;
X(0) = W[0];
X(1) = W[1];
BODY_00_15(0, A, B, C, D, E, T, X(0));
X(2) = W[2];
BODY_00_15(1, T, A, B, C, D, E, X(1));
X(3) = W[3];
BODY_00_15(2, E, T, A, B, C, D, X(2));
X(4) = W[4];
BODY_00_15(3, D, E, T, A, B, C, X(3));
X(5) = W[5];
BODY_00_15(4, C, D, E, T, A, B, X(4));
X(6) = W[6];
BODY_00_15(5, B, C, D, E, T, A, X(5));
X(7) = W[7];
BODY_00_15(6, A, B, C, D, E, T, X(6));
X(8) = W[8];
BODY_00_15(7, T, A, B, C, D, E, X(7));
X(9) = W[9];
BODY_00_15(8, E, T, A, B, C, D, X(8));
X(10) = W[10];
BODY_00_15(9, D, E, T, A, B, C, X(9));
X(11) = W[11];
BODY_00_15(10, C, D, E, T, A, B, X(10));
X(12) = W[12];
BODY_00_15(11, B, C, D, E, T, A, X(11));
X(13) = W[13];
BODY_00_15(12, A, B, C, D, E, T, X(12));
X(14) = W[14];
BODY_00_15(13, T, A, B, C, D, E, X(13));
X(15) = W[15];
BODY_00_15(14, E, T, A, B, C, D, X(14));
BODY_00_15(15, D, E, T, A, B, C, X(15));
data += SHA_CBLOCK;
} else {
(void)HOST_c2l(data, l);
X(0) = l;
(void)HOST_c2l(data, l);
X(1) = l;
BODY_00_15(0, A, B, C, D, E, T, X(0));
(void)HOST_c2l(data, l);
X(2) = l;
BODY_00_15(1, T, A, B, C, D, E, X(1));
(void)HOST_c2l(data, l);
X(3) = l;
BODY_00_15(2, E, T, A, B, C, D, X(2));
(void)HOST_c2l(data, l);
X(4) = l;
BODY_00_15(3, D, E, T, A, B, C, X(3));
(void)HOST_c2l(data, l);
X(5) = l;
BODY_00_15(4, C, D, E, T, A, B, X(4));
(void)HOST_c2l(data, l);
X(6) = l;
BODY_00_15(5, B, C, D, E, T, A, X(5));
(void)HOST_c2l(data, l);
X(7) = l;
BODY_00_15(6, A, B, C, D, E, T, X(6));
(void)HOST_c2l(data, l);
X(8) = l;
BODY_00_15(7, T, A, B, C, D, E, X(7));
(void)HOST_c2l(data, l);
X(9) = l;
BODY_00_15(8, E, T, A, B, C, D, X(8));
(void)HOST_c2l(data, l);
X(10) = l;
BODY_00_15(9, D, E, T, A, B, C, X(9));
(void)HOST_c2l(data, l);
X(11) = l;
BODY_00_15(10, C, D, E, T, A, B, X(10));
(void)HOST_c2l(data, l);
X(12) = l;
BODY_00_15(11, B, C, D, E, T, A, X(11));
(void)HOST_c2l(data, l);
X(13) = l;
BODY_00_15(12, A, B, C, D, E, T, X(12));
(void)HOST_c2l(data, l);
X(14) = l;
BODY_00_15(13, T, A, B, C, D, E, X(13));
(void)HOST_c2l(data, l);
X(15) = l;
BODY_00_15(14, E, T, A, B, C, D, X(14));
BODY_00_15(15, D, E, T, A, B, C, X(15));
}
BODY_16_19(16, C, D, E, T, A, B, X(0), X(0), X(2), X(8), X(13));
BODY_16_19(17, B, C, D, E, T, A, X(1), X(1), X(3), X(9), X(14));
BODY_16_19(18, A, B, C, D, E, T, X(2), X(2), X(4), X(10), X(15));
BODY_16_19(19, T, A, B, C, D, E, X(3), X(3), X(5), X(11), X(0));
BODY_20_31(20, E, T, A, B, C, D, X(4), X(4), X(6), X(12), X(1));
BODY_20_31(21, D, E, T, A, B, C, X(5), X(5), X(7), X(13), X(2));
BODY_20_31(22, C, D, E, T, A, B, X(6), X(6), X(8), X(14), X(3));
BODY_20_31(23, B, C, D, E, T, A, X(7), X(7), X(9), X(15), X(4));
BODY_20_31(24, A, B, C, D, E, T, X(8), X(8), X(10), X(0), X(5));
BODY_20_31(25, T, A, B, C, D, E, X(9), X(9), X(11), X(1), X(6));
BODY_20_31(26, E, T, A, B, C, D, X(10), X(10), X(12), X(2), X(7));
BODY_20_31(27, D, E, T, A, B, C, X(11), X(11), X(13), X(3), X(8));
BODY_20_31(28, C, D, E, T, A, B, X(12), X(12), X(14), X(4), X(9));
BODY_20_31(29, B, C, D, E, T, A, X(13), X(13), X(15), X(5), X(10));
BODY_20_31(30, A, B, C, D, E, T, X(14), X(14), X(0), X(6), X(11));
BODY_20_31(31, T, A, B, C, D, E, X(15), X(15), X(1), X(7), X(12));
BODY_32_39(32, E, T, A, B, C, D, X(0), X(2), X(8), X(13));
BODY_32_39(33, D, E, T, A, B, C, X(1), X(3), X(9), X(14));
BODY_32_39(34, C, D, E, T, A, B, X(2), X(4), X(10), X(15));
BODY_32_39(35, B, C, D, E, T, A, X(3), X(5), X(11), X(0));
BODY_32_39(36, A, B, C, D, E, T, X(4), X(6), X(12), X(1));
BODY_32_39(37, T, A, B, C, D, E, X(5), X(7), X(13), X(2));
BODY_32_39(38, E, T, A, B, C, D, X(6), X(8), X(14), X(3));
BODY_32_39(39, D, E, T, A, B, C, X(7), X(9), X(15), X(4));
BODY_40_59(40, C, D, E, T, A, B, X(8), X(10), X(0), X(5));
BODY_40_59(41, B, C, D, E, T, A, X(9), X(11), X(1), X(6));
BODY_40_59(42, A, B, C, D, E, T, X(10), X(12), X(2), X(7));
BODY_40_59(43, T, A, B, C, D, E, X(11), X(13), X(3), X(8));
BODY_40_59(44, E, T, A, B, C, D, X(12), X(14), X(4), X(9));
BODY_40_59(45, D, E, T, A, B, C, X(13), X(15), X(5), X(10));
BODY_40_59(46, C, D, E, T, A, B, X(14), X(0), X(6), X(11));
BODY_40_59(47, B, C, D, E, T, A, X(15), X(1), X(7), X(12));
BODY_40_59(48, A, B, C, D, E, T, X(0), X(2), X(8), X(13));
BODY_40_59(49, T, A, B, C, D, E, X(1), X(3), X(9), X(14));
BODY_40_59(50, E, T, A, B, C, D, X(2), X(4), X(10), X(15));
BODY_40_59(51, D, E, T, A, B, C, X(3), X(5), X(11), X(0));
BODY_40_59(52, C, D, E, T, A, B, X(4), X(6), X(12), X(1));
BODY_40_59(53, B, C, D, E, T, A, X(5), X(7), X(13), X(2));
BODY_40_59(54, A, B, C, D, E, T, X(6), X(8), X(14), X(3));
BODY_40_59(55, T, A, B, C, D, E, X(7), X(9), X(15), X(4));
BODY_40_59(56, E, T, A, B, C, D, X(8), X(10), X(0), X(5));
BODY_40_59(57, D, E, T, A, B, C, X(9), X(11), X(1), X(6));
BODY_40_59(58, C, D, E, T, A, B, X(10), X(12), X(2), X(7));
BODY_40_59(59, B, C, D, E, T, A, X(11), X(13), X(3), X(8));
BODY_60_79(60, A, B, C, D, E, T, X(12), X(14), X(4), X(9));
BODY_60_79(61, T, A, B, C, D, E, X(13), X(15), X(5), X(10));
BODY_60_79(62, E, T, A, B, C, D, X(14), X(0), X(6), X(11));
BODY_60_79(63, D, E, T, A, B, C, X(15), X(1), X(7), X(12));
BODY_60_79(64, C, D, E, T, A, B, X(0), X(2), X(8), X(13));
BODY_60_79(65, B, C, D, E, T, A, X(1), X(3), X(9), X(14));
BODY_60_79(66, A, B, C, D, E, T, X(2), X(4), X(10), X(15));
BODY_60_79(67, T, A, B, C, D, E, X(3), X(5), X(11), X(0));
BODY_60_79(68, E, T, A, B, C, D, X(4), X(6), X(12), X(1));
BODY_60_79(69, D, E, T, A, B, C, X(5), X(7), X(13), X(2));
BODY_60_79(70, C, D, E, T, A, B, X(6), X(8), X(14), X(3));
BODY_60_79(71, B, C, D, E, T, A, X(7), X(9), X(15), X(4));
BODY_60_79(72, A, B, C, D, E, T, X(8), X(10), X(0), X(5));
BODY_60_79(73, T, A, B, C, D, E, X(9), X(11), X(1), X(6));
BODY_60_79(74, E, T, A, B, C, D, X(10), X(12), X(2), X(7));
BODY_60_79(75, D, E, T, A, B, C, X(11), X(13), X(3), X(8));
BODY_60_79(76, C, D, E, T, A, B, X(12), X(14), X(4), X(9));
BODY_60_79(77, B, C, D, E, T, A, X(13), X(15), X(5), X(10));
BODY_60_79(78, A, B, C, D, E, T, X(14), X(0), X(6), X(11));
BODY_60_79(79, T, A, B, C, D, E, X(15), X(1), X(7), X(12));
c->h0 = (c->h0 + E) & 0xffffffffL;
c->h1 = (c->h1 + T) & 0xffffffffL;
c->h2 = (c->h2 + A) & 0xffffffffL;
c->h3 = (c->h3 + B) & 0xffffffffL;
c->h4 = (c->h4 + C) & 0xffffffffL;
if (--num == 0)
break;
A = c->h0;
B = c->h1;
C = c->h2;
D = c->h3;
E = c->h4;
}
}
# endif
#else /* OPENSSL_SMALL_FOOTPRINT */
# define BODY_00_15(xi) do { \
T=E+K_00_19+F_00_19(B,C,D); \
E=D, D=C, C=ROTATE(B,30), B=A; \
A=ROTATE(A,5)+T+xi; } while(0)
# define BODY_16_19(xa,xb,xc,xd) do { \
Xupdate(T,xa,xa,xb,xc,xd); \
T+=E+K_00_19+F_00_19(B,C,D); \
E=D, D=C, C=ROTATE(B,30), B=A; \
A=ROTATE(A,5)+T; } while(0)
# define BODY_20_39(xa,xb,xc,xd) do { \
Xupdate(T,xa,xa,xb,xc,xd); \
T+=E+K_20_39+F_20_39(B,C,D); \
E=D, D=C, C=ROTATE(B,30), B=A; \
A=ROTATE(A,5)+T; } while(0)
# define BODY_40_59(xa,xb,xc,xd) do { \
Xupdate(T,xa,xa,xb,xc,xd); \
T+=E+K_40_59+F_40_59(B,C,D); \
E=D, D=C, C=ROTATE(B,30), B=A; \
A=ROTATE(A,5)+T; } while(0)
# define BODY_60_79(xa,xb,xc,xd) do { \
Xupdate(T,xa,xa,xb,xc,xd); \
T=E+K_60_79+F_60_79(B,C,D); \
E=D, D=C, C=ROTATE(B,30), B=A; \
A=ROTATE(A,5)+T+xa; } while(0)
# if !defined(SHA1_ASM)
static void HASH_BLOCK_DATA_ORDER(SHA_CTX *c, const void *p, size_t num)
{
const unsigned char *data = p;
register unsigned MD32_REG_T A, B, C, D, E, T, l;
int i;
SHA_LONG X[16];
A = c->h0;
B = c->h1;
C = c->h2;
D = c->h3;
E = c->h4;
for (;;) {
for (i = 0; i < 16; i++) {
(void)HOST_c2l(data, l);
X[i] = l;
BODY_00_15(X[i]);
}
for (i = 0; i < 4; i++) {
BODY_16_19(X[i], X[i + 2], X[i + 8], X[(i + 13) & 15]);
}
for (; i < 24; i++) {
BODY_20_39(X[i & 15], X[(i + 2) & 15], X[(i + 8) & 15],
X[(i + 13) & 15]);
}
for (i = 0; i < 20; i++) {
BODY_40_59(X[(i + 8) & 15], X[(i + 10) & 15], X[i & 15],
X[(i + 5) & 15]);
}
for (i = 4; i < 24; i++) {
BODY_60_79(X[(i + 8) & 15], X[(i + 10) & 15], X[i & 15],
X[(i + 5) & 15]);
}
c->h0 = (c->h0 + A) & 0xffffffffL;
c->h1 = (c->h1 + B) & 0xffffffffL;
c->h2 = (c->h2 + C) & 0xffffffffL;
c->h3 = (c->h3 + D) & 0xffffffffL;
c->h4 = (c->h4 + E) & 0xffffffffL;
if (--num == 0)
break;
A = c->h0;
B = c->h1;
C = c->h2;
D = c->h3;
E = c->h4;
}
}
# endif
#endif
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