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Add crypto/sha1 module from gnulib

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This commit is contained in:
Leo Liu 2011-05-24 16:12:52 +08:00
parent 5a95c00237
commit 13c3daa4ae
8 changed files with 571 additions and 3 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2011-05-24 Leo Liu <sdl.web@gmail.com>
* m4/sha1.m4:
* m4/gl-comp.m4:
* lib/sha1.h:
* lib/sha1.c:
* lib/makefile.w32-in (GNULIBOBJS):
* lib/gnulib.mk:
* Makefile.in (GNULIB_MODULES): Add crypto/sha1 module.
2011-05-24 Glenn Morris <rgm@gnu.org>
* Makefile.in (TAGS, tags, check): Pass MFLAGS to sub-makes.

4
Makefile.in
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@ -332,8 +332,8 @@ DOS_gnulib_comp.m4 = gl-comp.m4
# $(gnulib_srcdir) (relative to $(srcdir) and should have build tools
# as per $(gnulib_srcdir)/DEPENDENCIES.
GNULIB_MODULES = \
careadlinkat crypto/md5 dtoastr filemode getloadavg getopt-gnu \
ignore-value intprops lstat mktime readlink \
careadlinkat crypto/md5 crypto/sha1 dtoastr filemode getloadavg \
getopt-gnu ignore-value intprops lstat mktime readlink \
socklen stdarg stdio strftime strtoumax symlink sys_stat
GNULIB_TOOL_FLAGS = \
--conditional-dependencies --import --no-changelog --no-vc-files \

11
lib/gnulib.mk
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@ -9,7 +9,7 @@
# the same distribution terms as the rest of that program.
#
# Generated by gnulib-tool.
# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=. --makefile-name=gnulib.mk --no-libtool --macro-prefix=gl --no-vc-files careadlinkat crypto/md5 dtoastr filemode getloadavg getopt-gnu ignore-value intprops lstat mktime readlink socklen stdarg stdio strftime strtoumax symlink sys_stat
# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=. --makefile-name=gnulib.mk --no-libtool --macro-prefix=gl --no-vc-files careadlinkat crypto/md5 crypto/sha1 dtoastr filemode getloadavg getopt-gnu ignore-value intprops lstat mktime readlink socklen stdarg stdio strftime strtoumax symlink sys_stat
MOSTLYCLEANFILES += core *.stackdump
@ -94,6 +94,15 @@ EXTRA_libgnu_a_SOURCES += md5.c
## end gnulib module crypto/md5
## begin gnulib module crypto/sha1
EXTRA_DIST += sha1.c sha1.h
EXTRA_libgnu_a_SOURCES += sha1.c
## end gnulib module crypto/sha1
## begin gnulib module dosname
if gl_GNULIB_ENABLED_dosname

10
lib/makefile.w32-in
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@ -29,6 +29,7 @@ GNULIBOBJS = $(BLD)/dtoastr.$(O) \
$(BLD)/strftime.$(O) \
$(BLD)/time_r.$(O) \
$(BLD)/md5.$(O) \
$(BLD)/sha1.$(O) \
$(BLD)/filemode.$(O)
#
@ -110,6 +111,15 @@ $(BLD)/md5.$(O) : \
$(EMACS_ROOT)/src/m/intel386.h \
$(EMACS_ROOT)/src/config.h
$(BLD)/sha1.$(O) : \
$(SRC)/sha1.c \
$(SRC)/sha1.h \
$(EMACS_ROOT)/nt/inc/stdint.h \
$(EMACS_ROOT)/nt/inc/sys/stat.h \
$(EMACS_ROOT)/src/s/ms-w32.h \
$(EMACS_ROOT)/src/m/intel386.h \
$(EMACS_ROOT)/src/config.h
$(BLD)/filemode.$(O) : \
$(SRC)/filemode.c \
$(SRC)/filemode.h \

427
lib/sha1.c Normal file
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@ -0,0 +1,427 @@
/* sha1.c - Functions to compute SHA1 message digest of files or
memory blocks according to the NIST specification FIPS-180-1.
Copyright (C) 2000-2001, 2003-2006, 2008-2011 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by Scott G. Miller
Credits:
Robert Klep <robert@ilse.nl> -- Expansion function fix
*/
#include <config.h>
#include "sha1.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#if USE_UNLOCKED_IO
# include "unlocked-io.h"
#endif
#ifdef WORDS_BIGENDIAN
# define SWAP(n) (n)
#else
# define SWAP(n) \
(((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
#endif
#define BLOCKSIZE 32768
#if BLOCKSIZE % 64 != 0
# error "invalid BLOCKSIZE"
#endif
/* This array contains the bytes used to pad the buffer to the next
64-byte boundary. (RFC 1321, 3.1: Step 1) */
static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
/* Take a pointer to a 160 bit block of data (five 32 bit ints) and
initialize it to the start constants of the SHA1 algorithm. This
must be called before using hash in the call to sha1_hash. */
void
sha1_init_ctx (struct sha1_ctx *ctx)
{
ctx->A = 0x67452301;
ctx->B = 0xefcdab89;
ctx->C = 0x98badcfe;
ctx->D = 0x10325476;
ctx->E = 0xc3d2e1f0;
ctx->total[0] = ctx->total[1] = 0;
ctx->buflen = 0;
}
/* Copy the 4 byte value from v into the memory location pointed to by *cp,
If your architecture allows unaligned access this is equivalent to
* (uint32_t *) cp = v */
static inline void
set_uint32 (char *cp, uint32_t v)
{
memcpy (cp, &v, sizeof v);
}
/* Put result from CTX in first 20 bytes following RESBUF. The result
must be in little endian byte order. */
void *
sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf)
{
char *r = resbuf;
set_uint32 (r + 0 * sizeof ctx->A, SWAP (ctx->A));
set_uint32 (r + 1 * sizeof ctx->B, SWAP (ctx->B));
set_uint32 (r + 2 * sizeof ctx->C, SWAP (ctx->C));
set_uint32 (r + 3 * sizeof ctx->D, SWAP (ctx->D));
set_uint32 (r + 4 * sizeof ctx->E, SWAP (ctx->E));
return resbuf;
}
/* Process the remaining bytes in the internal buffer and the usual
prolog according to the standard and write the result to RESBUF. */
void *
sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf)
{
/* Take yet unprocessed bytes into account. */
uint32_t bytes = ctx->buflen;
size_t size = (bytes < 56) ? 64 / 4 : 64 * 2 / 4;
/* Now count remaining bytes. */
ctx->total[0] += bytes;
if (ctx->total[0] < bytes)
++ctx->total[1];
/* Put the 64-bit file length in *bits* at the end of the buffer. */
ctx->buffer[size - 2] = SWAP ((ctx->total[1] << 3) | (ctx->total[0] >> 29));
ctx->buffer[size - 1] = SWAP (ctx->total[0] << 3);
memcpy (&((char *) ctx->buffer)[bytes], fillbuf, (size - 2) * 4 - bytes);
/* Process last bytes. */
sha1_process_block (ctx->buffer, size * 4, ctx);
return sha1_read_ctx (ctx, resbuf);
}
/* Compute SHA1 message digest for bytes read from STREAM. The
resulting message digest number will be written into the 16 bytes
beginning at RESBLOCK. */
int
sha1_stream (FILE *stream, void *resblock)
{
struct sha1_ctx ctx;
size_t sum;
char *buffer = malloc (BLOCKSIZE + 72);
if (!buffer)
return 1;
/* Initialize the computation context. */
sha1_init_ctx (&ctx);
/* Iterate over full file contents. */
while (1)
{
/* We read the file in blocks of BLOCKSIZE bytes. One call of the
computation function processes the whole buffer so that with the
next round of the loop another block can be read. */
size_t n;
sum = 0;
/* Read block. Take care for partial reads. */
while (1)
{
n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
sum += n;
if (sum == BLOCKSIZE)
break;
if (n == 0)
{
/* Check for the error flag IFF N == 0, so that we don't
exit the loop after a partial read due to e.g., EAGAIN
or EWOULDBLOCK. */
if (ferror (stream))
{
free (buffer);
return 1;
}
goto process_partial_block;
}
/* We've read at least one byte, so ignore errors. But always
check for EOF, since feof may be true even though N > 0.
Otherwise, we could end up calling fread after EOF. */
if (feof (stream))
goto process_partial_block;
}
/* Process buffer with BLOCKSIZE bytes. Note that
BLOCKSIZE % 64 == 0
*/
sha1_process_block (buffer, BLOCKSIZE, &ctx);
}
process_partial_block:;
/* Process any remaining bytes. */
if (sum > 0)
sha1_process_bytes (buffer, sum, &ctx);
/* Construct result in desired memory. */
sha1_finish_ctx (&ctx, resblock);
free (buffer);
return 0;
}
/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The
result is always in little endian byte order, so that a byte-wise
output yields to the wanted ASCII representation of the message
digest. */
void *
sha1_buffer (const char *buffer, size_t len, void *resblock)
{
struct sha1_ctx ctx;
/* Initialize the computation context. */
sha1_init_ctx (&ctx);
/* Process whole buffer but last len % 64 bytes. */
sha1_process_bytes (buffer, len, &ctx);
/* Put result in desired memory area. */
return sha1_finish_ctx (&ctx, resblock);
}
void
sha1_process_bytes (const void *buffer, size_t len, struct sha1_ctx *ctx)
{
/* When we already have some bits in our internal buffer concatenate
both inputs first. */
if (ctx->buflen != 0)
{
size_t left_over = ctx->buflen;
size_t add = 128 - left_over > len ? len : 128 - left_over;
memcpy (&((char *) ctx->buffer)[left_over], buffer, add);
ctx->buflen += add;
if (ctx->buflen > 64)
{
sha1_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
ctx->buflen &= 63;
/* The regions in the following copy operation cannot overlap. */
memcpy (ctx->buffer,
&((char *) ctx->buffer)[(left_over + add) & ~63],
ctx->buflen);
}
buffer = (const char *) buffer + add;
len -= add;
}
/* Process available complete blocks. */
if (len >= 64)
{
#if !_STRING_ARCH_unaligned
# define alignof(type) offsetof (struct { char c; type x; }, x)
# define UNALIGNED_P(p) (((size_t) p) % alignof (uint32_t) != 0)
if (UNALIGNED_P (buffer))
while (len > 64)
{
sha1_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
buffer = (const char *) buffer + 64;
len -= 64;
}
else
#endif
{
sha1_process_block (buffer, len & ~63, ctx);
buffer = (const char *) buffer + (len & ~63);
len &= 63;
}
}
/* Move remaining bytes in internal buffer. */
if (len > 0)
{
size_t left_over = ctx->buflen;
memcpy (&((char *) ctx->buffer)[left_over], buffer, len);
left_over += len;
if (left_over >= 64)
{
sha1_process_block (ctx->buffer, 64, ctx);
left_over -= 64;
memcpy (ctx->buffer, &ctx->buffer[16], left_over);
}
ctx->buflen = left_over;
}
}
/* --- Code below is the primary difference between md5.c and sha1.c --- */
/* SHA1 round constants */
#define K1 0x5a827999
#define K2 0x6ed9eba1
#define K3 0x8f1bbcdc
#define K4 0xca62c1d6
/* Round functions. Note that F2 is the same as F4. */
#define F1(B,C,D) ( D ^ ( B & ( C ^ D ) ) )
#define F2(B,C,D) (B ^ C ^ D)
#define F3(B,C,D) ( ( B & C ) | ( D & ( B | C ) ) )
#define F4(B,C,D) (B ^ C ^ D)
/* Process LEN bytes of BUFFER, accumulating context into CTX.
It is assumed that LEN % 64 == 0.
Most of this code comes from GnuPG's cipher/sha1.c. */
void
sha1_process_block (const void *buffer, size_t len, struct sha1_ctx *ctx)
{
const uint32_t *words = buffer;
size_t nwords = len / sizeof (uint32_t);
const uint32_t *endp = words + nwords;
uint32_t x[16];
uint32_t a = ctx->A;
uint32_t b = ctx->B;
uint32_t c = ctx->C;
uint32_t d = ctx->D;
uint32_t e = ctx->E;
/* First increment the byte count. RFC 1321 specifies the possible
length of the file up to 2^64 bits. Here we only compute the
number of bytes. Do a double word increment. */
ctx->total[0] += len;
if (ctx->total[0] < len)
++ctx->total[1];
#define rol(x, n) (((x) << (n)) | ((uint32_t) (x) >> (32 - (n))))
#define M(I) ( tm = x[I&0x0f] ^ x[(I-14)&0x0f] \
^ x[(I-8)&0x0f] ^ x[(I-3)&0x0f] \
, (x[I&0x0f] = rol(tm, 1)) )
#define R(A,B,C,D,E,F,K,M) do { E += rol( A, 5 ) \
+ F( B, C, D ) \
+ K \
+ M; \
B = rol( B, 30 ); \
} while(0)
while (words < endp)
{
uint32_t tm;
int t;
for (t = 0; t < 16; t++)
{
x[t] = SWAP (*words);
words++;
}
R( a, b, c, d, e, F1, K1, x[ 0] );
R( e, a, b, c, d, F1, K1, x[ 1] );
R( d, e, a, b, c, F1, K1, x[ 2] );
R( c, d, e, a, b, F1, K1, x[ 3] );
R( b, c, d, e, a, F1, K1, x[ 4] );
R( a, b, c, d, e, F1, K1, x[ 5] );
R( e, a, b, c, d, F1, K1, x[ 6] );
R( d, e, a, b, c, F1, K1, x[ 7] );
R( c, d, e, a, b, F1, K1, x[ 8] );
R( b, c, d, e, a, F1, K1, x[ 9] );
R( a, b, c, d, e, F1, K1, x[10] );
R( e, a, b, c, d, F1, K1, x[11] );
R( d, e, a, b, c, F1, K1, x[12] );
R( c, d, e, a, b, F1, K1, x[13] );
R( b, c, d, e, a, F1, K1, x[14] );
R( a, b, c, d, e, F1, K1, x[15] );
R( e, a, b, c, d, F1, K1, M(16) );
R( d, e, a, b, c, F1, K1, M(17) );
R( c, d, e, a, b, F1, K1, M(18) );
R( b, c, d, e, a, F1, K1, M(19) );
R( a, b, c, d, e, F2, K2, M(20) );
R( e, a, b, c, d, F2, K2, M(21) );
R( d, e, a, b, c, F2, K2, M(22) );
R( c, d, e, a, b, F2, K2, M(23) );
R( b, c, d, e, a, F2, K2, M(24) );
R( a, b, c, d, e, F2, K2, M(25) );
R( e, a, b, c, d, F2, K2, M(26) );
R( d, e, a, b, c, F2, K2, M(27) );
R( c, d, e, a, b, F2, K2, M(28) );
R( b, c, d, e, a, F2, K2, M(29) );
R( a, b, c, d, e, F2, K2, M(30) );
R( e, a, b, c, d, F2, K2, M(31) );
R( d, e, a, b, c, F2, K2, M(32) );
R( c, d, e, a, b, F2, K2, M(33) );
R( b, c, d, e, a, F2, K2, M(34) );
R( a, b, c, d, e, F2, K2, M(35) );
R( e, a, b, c, d, F2, K2, M(36) );
R( d, e, a, b, c, F2, K2, M(37) );
R( c, d, e, a, b, F2, K2, M(38) );
R( b, c, d, e, a, F2, K2, M(39) );
R( a, b, c, d, e, F3, K3, M(40) );
R( e, a, b, c, d, F3, K3, M(41) );
R( d, e, a, b, c, F3, K3, M(42) );
R( c, d, e, a, b, F3, K3, M(43) );
R( b, c, d, e, a, F3, K3, M(44) );
R( a, b, c, d, e, F3, K3, M(45) );
R( e, a, b, c, d, F3, K3, M(46) );
R( d, e, a, b, c, F3, K3, M(47) );
R( c, d, e, a, b, F3, K3, M(48) );
R( b, c, d, e, a, F3, K3, M(49) );
R( a, b, c, d, e, F3, K3, M(50) );
R( e, a, b, c, d, F3, K3, M(51) );
R( d, e, a, b, c, F3, K3, M(52) );
R( c, d, e, a, b, F3, K3, M(53) );
R( b, c, d, e, a, F3, K3, M(54) );
R( a, b, c, d, e, F3, K3, M(55) );
R( e, a, b, c, d, F3, K3, M(56) );
R( d, e, a, b, c, F3, K3, M(57) );
R( c, d, e, a, b, F3, K3, M(58) );
R( b, c, d, e, a, F3, K3, M(59) );
R( a, b, c, d, e, F4, K4, M(60) );
R( e, a, b, c, d, F4, K4, M(61) );
R( d, e, a, b, c, F4, K4, M(62) );
R( c, d, e, a, b, F4, K4, M(63) );
R( b, c, d, e, a, F4, K4, M(64) );
R( a, b, c, d, e, F4, K4, M(65) );
R( e, a, b, c, d, F4, K4, M(66) );
R( d, e, a, b, c, F4, K4, M(67) );
R( c, d, e, a, b, F4, K4, M(68) );
R( b, c, d, e, a, F4, K4, M(69) );
R( a, b, c, d, e, F4, K4, M(70) );
R( e, a, b, c, d, F4, K4, M(71) );
R( d, e, a, b, c, F4, K4, M(72) );
R( c, d, e, a, b, F4, K4, M(73) );
R( b, c, d, e, a, F4, K4, M(74) );
R( a, b, c, d, e, F4, K4, M(75) );
R( e, a, b, c, d, F4, K4, M(76) );
R( d, e, a, b, c, F4, K4, M(77) );
R( c, d, e, a, b, F4, K4, M(78) );
R( b, c, d, e, a, F4, K4, M(79) );
a = ctx->A += a;
b = ctx->B += b;
c = ctx->C += c;
d = ctx->D += d;
e = ctx->E += e;
}
}

92
lib/sha1.h Normal file
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@ -0,0 +1,92 @@
/* Declarations of functions and data types used for SHA1 sum
library functions.
Copyright (C) 2000-2001, 2003, 2005-2006, 2008-2011 Free Software
Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef SHA1_H
# define SHA1_H 1
# include <stdio.h>
# include <stdint.h>
# ifdef __cplusplus
extern "C" {
# endif
#define SHA1_DIGEST_SIZE 20
/* Structure to save state of computation between the single steps. */
struct sha1_ctx
{
uint32_t A;
uint32_t B;
uint32_t C;
uint32_t D;
uint32_t E;
uint32_t total[2];
uint32_t buflen;
uint32_t buffer[32];
};
/* Initialize structure containing state of computation. */
extern void sha1_init_ctx (struct sha1_ctx *ctx);
/* Starting with the result of former calls of this function (or the
initialization function update the context for the next LEN bytes
starting at BUFFER.
It is necessary that LEN is a multiple of 64!!! */
extern void sha1_process_block (const void *buffer, size_t len,
struct sha1_ctx *ctx);
/* Starting with the result of former calls of this function (or the
initialization function update the context for the next LEN bytes
starting at BUFFER.
It is NOT required that LEN is a multiple of 64. */
extern void sha1_process_bytes (const void *buffer, size_t len,
struct sha1_ctx *ctx);
/* Process the remaining bytes in the buffer and put result from CTX
in first 20 bytes following RESBUF. The result is always in little
endian byte order, so that a byte-wise output yields to the wanted
ASCII representation of the message digest. */
extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf);
/* Put result from CTX in first 20 bytes following RESBUF. The result is
always in little endian byte order, so that a byte-wise output yields
to the wanted ASCII representation of the message digest. */
extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf);
/* Compute SHA1 message digest for bytes read from STREAM. The
resulting message digest number will be written into the 20 bytes
beginning at RESBLOCK. */
extern int sha1_stream (FILE *stream, void *resblock);
/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The
result is always in little endian byte order, so that a byte-wise
output yields to the wanted ASCII representation of the message
digest. */
extern void *sha1_buffer (const char *buffer, size_t len, void *resblock);
# ifdef __cplusplus
}
# endif
#endif

5
m4/gl-comp.m4
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@ -31,6 +31,7 @@ AC_DEFUN([gl_EARLY],
# Code from module c++defs:
# Code from module careadlinkat:
# Code from module crypto/md5:
# Code from module crypto/sha1:
# Code from module dosname:
# Code from module dtoastr:
# Code from module extensions:
@ -92,6 +93,7 @@ AC_DEFUN([gl_INIT],
gl_source_base='lib'
AC_CHECK_FUNCS_ONCE([readlinkat])
gl_MD5
gl_SHA1
AC_REQUIRE([gl_C99_STRTOLD])
gl_FILEMODE
gl_GETLOADAVG([$gl_source_base])
@ -364,6 +366,8 @@ AC_DEFUN([gl_FILE_LIST], [
lib/mktime-internal.h
lib/mktime.c
lib/readlink.c
lib/sha1.c
lib/sha1.h
lib/stat.c
lib/stdarg.in.h
lib/stdbool.in.h
@ -399,6 +403,7 @@ AC_DEFUN([gl_FILE_LIST], [
m4/mktime.m4
m4/multiarch.m4
m4/readlink.m4
m4/sha1.m4
m4/socklen.m4
m4/ssize_t.m4
m4/st_dm_mode.m4

15
m4/sha1.m4 Normal file
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@ -0,0 +1,15 @@
# sha1.m4 serial 9
dnl Copyright (C) 2002-2006, 2008-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_SHA1],
[
AC_LIBOBJ([sha1])
dnl Prerequisites of lib/sha1.c.
AC_REQUIRE([gl_BIGENDIAN])
AC_REQUIRE([AC_C_INLINE])
:
])