Added crypto/sha1 needed by routing/kademlia
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3 changed files with 286 additions and 1 deletions
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@ -2,7 +2,7 @@ CC = gcc
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CFLAGS = -O0 -I../include -g3
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LFLAGS =
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DEPS =
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OBJS = rsa.o sha256.o sha512.o
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OBJS = rsa.o sha256.o sha512.o sha1.o
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%.o: %.c $(DEPS)
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$(CC) -c -o $@ $< $(CFLAGS)
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266
crypto/sha1.c
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266
crypto/sha1.c
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@ -0,0 +1,266 @@
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/*
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SHA-1 in C
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By Steve Reid <sreid@sea-to-sky.net>
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100% Public Domain
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-----------------
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Modified 7/98
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By James H. Brown <jbrown@burgoyne.com>
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Still 100% Public Domain
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Corrected a problem which generated improper hash values on 16 bit machines
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Routine SHA1Update changed from
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void SHA1Update(SHA1_CTX* context, unsigned char* data, unsigned int
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len)
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to
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void SHA1Update(SHA1_CTX* context, unsigned char* data, unsigned
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long len)
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The 'len' parameter was declared an int which works fine on 32 bit machines.
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However, on 16 bit machines an int is too small for the shifts being done
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against
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it. This caused the hash function to generate incorrect values if len was
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greater than 8191 (8K - 1) due to the 'len << 3' on line 3 of SHA1Update().
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Since the file IO in main() reads 16K at a time, any file 8K or larger would
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be guaranteed to generate the wrong hash (e.g. Test Vector #3, a million
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"a"s).
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I also changed the declaration of variables i & j in SHA1Update to
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unsigned long from unsigned int for the same reason.
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These changes should make no difference to any 32 bit implementations since
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an
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int and a long are the same size in those environments.
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--
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I also corrected a few compiler warnings generated by Borland C.
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1. Added #include <process.h> for exit() prototype
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2. Removed unused variable 'j' in SHA1Final
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3. Changed exit(0) to return(0) at end of main.
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ALL changes I made can be located by searching for comments containing 'JHB'
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-----------------
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Modified 8/98
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By Steve Reid <sreid@sea-to-sky.net>
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Still 100% public domain
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1- Removed #include <process.h> and used return() instead of exit()
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2- Fixed overwriting of finalcount in SHA1Final() (discovered by Chris Hall)
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3- Changed email address from steve@edmweb.com to sreid@sea-to-sky.net
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-----------------
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Modified 4/01
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By Saul Kravitz <Saul.Kravitz@celera.com>
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Still 100% PD
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Modified to run on Compaq Alpha hardware.
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-----------------
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Modified 07/2002
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By Ralph Giles <giles@artofcode.com>
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Still 100% public domain
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modified for use with stdint types, autoconf
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code cleanup, removed attribution comments
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switched SHA1Final() argument order for consistency
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use SHA1_ prefix for public api
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move public api to sha1.h
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-----------------
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Modified 06/13
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By Moritz Warning <moritzwarning@web.de>
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Still 100% public domain
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- add compile time endianess detection that works for OpenWrt.
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- remove #include "os_types.h" - is not on my system
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*/
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/*
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Test Vectors (from FIPS PUB 180-1)
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"abc"
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A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
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"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
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84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
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A million repetitions of "a"
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34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
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*/
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/* #define SHA1HANDSOFF */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <libp2p/routing/sha1.h>
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void SHA1_Transform(uint32_t state[5], const uint8_t buffer[64]);
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#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
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/* blk0() and blk() perform the initial expand. */
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/* I got the idea of expanding during the round function from SSLeay */
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#if (defined(__BYTE_ORDER__)&&(__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))
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#define blk0(i) block->l[i]
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#elif (defined(__BYTE_ORDER__)&&(__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
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#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
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|(rol(block->l[i],8)&0x00FF00FF))
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#else
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#error "Cannot determine endianess."
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#endif
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#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
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^block->l[(i+2)&15]^block->l[i&15],1))
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/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
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#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
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#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
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#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
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#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
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#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
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#ifdef VERBOSE /* SAK */
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void SHAPrintContext(SHA1_CTX *context, char *msg){
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printf("%s (%d,%d) %x %x %x %x %x\n",
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msg,
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context->count[0], context->count[1],
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context->state[0],
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context->state[1],
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context->state[2],
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context->state[3],
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context->state[4]);
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}
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#endif /* VERBOSE */
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/* Hash a single 512-bit block. This is the core of the algorithm. */
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void SHA1_Transform(uint32_t state[5], const uint8_t buffer[64])
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{
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uint32_t a, b, c, d, e;
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typedef union {
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uint8_t c[64];
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uint32_t l[16];
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} CHAR64LONG16;
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CHAR64LONG16* block;
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#ifdef SHA1HANDSOFF
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static uint8_t workspace[64];
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block = (CHAR64LONG16*)workspace;
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memcpy(block, buffer, 64);
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#else
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block = (CHAR64LONG16*)buffer;
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#endif
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/* Copy context->state[] to working vars */
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a = state[0];
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b = state[1];
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c = state[2];
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d = state[3];
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e = state[4];
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/* 4 rounds of 20 operations each. Loop unrolled. */
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R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
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R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
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R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
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R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
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R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
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R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
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R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
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R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
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R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
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R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
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R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
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R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
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R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
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R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
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R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
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R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
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R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
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R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
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R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
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R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
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/* Add the working vars back into context.state[] */
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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state[4] += e;
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/* Wipe variables */
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a = b = c = d = e = 0;
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}
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/* SHA1Init - Initialize new context */
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void SHA1_Init(SHA1_CTX* context)
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{
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/* SHA1 initialization constants */
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context->state[0] = 0x67452301;
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context->state[1] = 0xEFCDAB89;
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context->state[2] = 0x98BADCFE;
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context->state[3] = 0x10325476;
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context->state[4] = 0xC3D2E1F0;
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context->count[0] = context->count[1] = 0;
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}
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/* Run your data through this. */
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void SHA1_Update(SHA1_CTX* context, const uint8_t* data, const size_t len)
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{
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size_t i, j;
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#ifdef VERBOSE
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SHAPrintContext(context, "before");
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#endif
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j = (context->count[0] >> 3) & 63;
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if ((context->count[0] += len << 3) < (len << 3)) context->count[1]++;
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context->count[1] += (len >> 29);
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if ((j + len) > 63) {
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memcpy(&context->buffer[j], data, (i = 64-j));
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SHA1_Transform(context->state, context->buffer);
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for ( ; i + 63 < len; i += 64) {
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SHA1_Transform(context->state, data + i);
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}
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j = 0;
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}
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else i = 0;
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memcpy(&context->buffer[j], &data[i], len - i);
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#ifdef VERBOSE
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SHAPrintContext(context, "after ");
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#endif
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}
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/* Add padding and return the message digest. */
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void SHA1_Final(SHA1_CTX* context, uint8_t digest[SHA1_DIGEST_SIZE])
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{
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uint32_t i;
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uint8_t finalcount[8];
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for (i = 0; i < 8; i++) {
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finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
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>> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */
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}
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SHA1_Update(context, (uint8_t *)"\200", 1);
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while ((context->count[0] & 504) != 448) {
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SHA1_Update(context, (uint8_t *)"\0", 1);
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}
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SHA1_Update(context, finalcount, 8); /* Should cause a SHA1_Transform() */
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for (i = 0; i < SHA1_DIGEST_SIZE; i++) {
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digest[i] = (uint8_t)
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((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
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}
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/* Wipe variables */
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i = 0;
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memset(context->buffer, 0, 64);
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memset(context->state, 0, 20);
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memset(context->count, 0, 8);
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memset(finalcount, 0, 8); /* SWR */
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#ifdef SHA1HANDSOFF /* make SHA1Transform overwrite its own static vars */
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SHA1_Transform(context->state, context->buffer);
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#endif
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}
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19
include/libp2p/crypto/sha1.h
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19
include/libp2p/crypto/sha1.h
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@ -0,0 +1,19 @@
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#ifndef _SHA1_H
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#define _SHA1_H
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#include <inttypes.h>
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#include <string.h>
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typedef struct {
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uint32_t state[5];
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uint32_t count[2];
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uint8_t buffer[64];
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} SHA1_CTX;
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#define SHA1_DIGEST_SIZE 20
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void SHA1_Init(SHA1_CTX* context);
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void SHA1_Update(SHA1_CTX* context, const uint8_t* data, const size_t len);
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void SHA1_Final(SHA1_CTX* context, uint8_t digest[SHA1_DIGEST_SIZE]);
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#endif /* _SHA1_H */
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