diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libutil/Makefile.am | 4 | ||||
| -rw-r--r-- | src/libutil/hash.cc | 6 | ||||
| -rw-r--r-- | src/libutil/hash.hh | 6 | ||||
| -rw-r--r-- | src/libutil/md32_common.h | 620 | ||||
| -rw-r--r-- | src/libutil/sha256.c | 238 | ||||
| -rw-r--r-- | src/libutil/sha256.h | 35 | ||||
| -rw-r--r-- | src/nix-hash/nix-hash.cc | 1 |
7 files changed, 905 insertions, 5 deletions
diff --git a/src/libutil/Makefile.am b/src/libutil/Makefile.am index 12459b1db..6e83b8555 100644 --- a/src/libutil/Makefile.am +++ b/src/libutil/Makefile.am @@ -1,7 +1,7 @@ noinst_LIBRARIES = libutil.a libutil_a_SOURCES = util.cc util.hh hash.cc hash.hh \ - archive.cc archive.hh md5.c md5.h sha1.c sha1.h \ - aterm.cc aterm.hh + archive.cc archive.hh aterm.cc aterm.hh \ + md5.c md5.h sha1.c sha1.h sha256.c sha256.h md32_common.h AM_CXXFLAGS = -Wall -I.. ${aterm_include} diff --git a/src/libutil/hash.cc b/src/libutil/hash.cc index 46334ad82..599d375dc 100644 --- a/src/libutil/hash.cc +++ b/src/libutil/hash.cc @@ -3,6 +3,7 @@ extern "C" { #include "md5.h" #include "sha1.h" +#include "sha256.h" } #include "hash.hh" @@ -19,6 +20,7 @@ Hash::Hash(HashType type) this->type = type; if (type == htMD5) hashSize = md5HashSize; else if (type == htSHA1) hashSize = sha1HashSize; + else if (type == htSHA256) hashSize = sha256HashSize; else throw Error("unknown hash type"); memset(hash, 0, hashSize); } @@ -96,6 +98,7 @@ struct Ctx { md5_ctx md5; sha_ctx sha1; + SHA256_CTX sha256; }; @@ -103,6 +106,7 @@ static void start(HashType ht, Ctx & ctx) { if (ht == htMD5) md5_init_ctx(&ctx.md5); else if (ht == htSHA1) sha_init(&ctx.sha1); + else if (ht == htSHA256) SHA256_Init(&ctx.sha256); } @@ -111,6 +115,7 @@ static void update(HashType ht, Ctx & ctx, { if (ht == htMD5) md5_process_bytes(bytes, len, &ctx.md5); else if (ht == htSHA1) sha_update(&ctx.sha1, bytes, len); + else if (ht == htSHA256) SHA256_Update(&ctx.sha256, bytes, len); } @@ -121,6 +126,7 @@ static void finish(HashType ht, Ctx & ctx, unsigned char * hash) sha_final(&ctx.sha1); sha_digest(&ctx.sha1, hash); } + else if (ht == htSHA256) SHA256_Final(hash, &ctx.sha256); } diff --git a/src/libutil/hash.hh b/src/libutil/hash.hh index 1d2fce645..d82cd87a2 100644 --- a/src/libutil/hash.hh +++ b/src/libutil/hash.hh @@ -8,11 +8,12 @@ using namespace std; -typedef enum { htMD5, htSHA1 } HashType; +typedef enum { htMD5, htSHA1, htSHA256 } HashType; const int md5HashSize = 16; const int sha1HashSize = 20; +const int sha256HashSize = 32; struct Hash @@ -53,8 +54,7 @@ Hash hashString(const string & s, HashType ht); Hash hashFile(const Path & path, HashType ht); /* Compute the hash of the given path. The hash is defined as - md5(dump(path)). -*/ + md5(dump(path)). */ Hash hashPath(const Path & path, HashType ht); diff --git a/src/libutil/md32_common.h b/src/libutil/md32_common.h new file mode 100644 index 000000000..0cbcfaf8a --- /dev/null +++ b/src/libutil/md32_common.h @@ -0,0 +1,620 @@ +/* crypto/md32_common.h */ +/* ==================================================================== + * Copyright (c) 1999-2002 The OpenSSL Project. All rights reserved. + * + * 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 above 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 acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +/* + * This is a generic 32 bit "collector" for message digest algorithms. + * Whenever needed it collects input character stream into chunks of + * 32 bit values and invokes a block function that performs actual hash + * calculations. + * + * Porting guide. + * + * Obligatory macros: + * + * DATA_ORDER_IS_BIG_ENDIAN or DATA_ORDER_IS_LITTLE_ENDIAN + * this macro defines byte order of input stream. + * HASH_CBLOCK + * size of a unit chunk HASH_BLOCK operates on. + * HASH_LONG + * has to be at lest 32 bit wide, if it's wider, then + * HASH_LONG_LOG2 *has to* be defined along + * HASH_CTX + * context structure that at least contains following + * members: + * typedef struct { + * ... + * HASH_LONG Nl,Nh; + * HASH_LONG data[HASH_LBLOCK]; + * unsigned int num; + * ... + * } HASH_CTX; + * HASH_UPDATE + * name of "Update" function, implemented here. + * HASH_TRANSFORM + * name of "Transform" function, implemented here. + * HASH_FINAL + * name of "Final" function, implemented here. + * HASH_BLOCK_HOST_ORDER + * name of "block" function treating *aligned* input message + * in host byte order, implemented externally. + * HASH_BLOCK_DATA_ORDER + * name of "block" function treating *unaligned* input message + * in original (data) byte order, implemented externally (it + * actually is optional if data and host are of the same + * "endianess"). + * HASH_MAKE_STRING + * macro convering context variables to an ASCII hash string. + * + * Optional macros: + * + * B_ENDIAN or L_ENDIAN + * defines host byte-order. + * HASH_LONG_LOG2 + * defaults to 2 if not states otherwise. + * HASH_LBLOCK + * assumed to be HASH_CBLOCK/4 if not stated otherwise. + * HASH_BLOCK_DATA_ORDER_ALIGNED + * alternative "block" function capable of treating + * aligned input message in original (data) order, + * implemented externally. + * + * MD5 example: + * + * #define DATA_ORDER_IS_LITTLE_ENDIAN + * + * #define HASH_LONG MD5_LONG + * #define HASH_LONG_LOG2 MD5_LONG_LOG2 + * #define HASH_CTX MD5_CTX + * #define HASH_CBLOCK MD5_CBLOCK + * #define HASH_LBLOCK MD5_LBLOCK + * #define HASH_UPDATE MD5_Update + * #define HASH_TRANSFORM MD5_Transform + * #define HASH_FINAL MD5_Final + * #define HASH_BLOCK_HOST_ORDER md5_block_host_order + * #define HASH_BLOCK_DATA_ORDER md5_block_data_order + * + * <appro@fy.chalmers.se> + */ + +#if !defined(DATA_ORDER_IS_BIG_ENDIAN) && !defined(DATA_ORDER_IS_LITTLE_ENDIAN) +#error "DATA_ORDER must be defined!" +#endif + +#ifndef HASH_CBLOCK +#error "HASH_CBLOCK must be defined!" +#endif +#ifndef HASH_LONG +#error "HASH_LONG must be defined!" +#endif +#ifndef HASH_CTX +#error "HASH_CTX must be defined!" +#endif + +#ifndef HASH_UPDATE +#error "HASH_UPDATE must be defined!" +#endif +#ifndef HASH_TRANSFORM +#error "HASH_TRANSFORM must be defined!" +#endif +#ifndef HASH_FINAL +#error "HASH_FINAL must be defined!" +#endif + +#ifndef HASH_BLOCK_HOST_ORDER +#error "HASH_BLOCK_HOST_ORDER must be defined!" +#endif + +#if 0 +/* + * Moved below as it's required only if HASH_BLOCK_DATA_ORDER_ALIGNED + * isn't defined. + */ +#ifndef HASH_BLOCK_DATA_ORDER +#error "HASH_BLOCK_DATA_ORDER must be defined!" +#endif +#endif + +#ifndef HASH_LBLOCK +#define HASH_LBLOCK (HASH_CBLOCK/4) +#endif + +#ifndef HASH_LONG_LOG2 +#define HASH_LONG_LOG2 2 +#endif + +/* + * Engage compiler specific rotate intrinsic function if available. + */ +#undef ROTATE +#ifndef PEDANTIC +# if defined(_MSC_VER) || defined(__ICC) +# define ROTATE(a,n) _lrotl(a,n) +# elif defined(__MWERKS__) +# if defined(__POWERPC__) +# define ROTATE(a,n) __rlwinm(a,n,0,31) +# elif defined(__MC68K__) + /* Motorola specific tweak. <appro@fy.chalmers.se> */ +# define ROTATE(a,n) ( n<24 ? __rol(a,n) : __ror(a,32-n) ) +# else +# define ROTATE(a,n) __rol(a,n) +# endif +# elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) + /* + * Some GNU C inline assembler templates. Note that these are + * rotates by *constant* number of bits! But that's exactly + * what we need here... + * <appro@fy.chalmers.se> + */ +# if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) +# define ROTATE(a,n) ({ register unsigned int ret; \ + asm ( \ + "roll %1,%0" \ + : "=r"(ret) \ + : "I"(n), "0"(a) \ + : "cc"); \ + ret; \ + }) +# elif defined(__powerpc) || defined(__ppc__) || defined(__powerpc64__) +# define ROTATE(a,n) ({ register unsigned int ret; \ + asm ( \ + "rlwinm %0,%1,%2,0,31" \ + : "=r"(ret) \ + : "r"(a), "I"(n)); \ + ret; \ + }) +# endif +# endif +#endif /* PEDANTIC */ + +#if HASH_LONG_LOG2==2 /* Engage only if sizeof(HASH_LONG)== 4 */ +/* A nice byte order reversal from Wei Dai <weidai@eskimo.com> */ +#ifdef ROTATE +/* 5 instructions with rotate instruction, else 9 */ +#define REVERSE_FETCH32(a,l) ( \ + l=*(const HASH_LONG *)(a), \ + ((ROTATE(l,8)&0x00FF00FF)|(ROTATE((l&0x00FF00FF),24))) \ + ) +#else +/* 6 instructions with rotate instruction, else 8 */ +#define REVERSE_FETCH32(a,l) ( \ + l=*(const HASH_LONG *)(a), \ + l=(((l>>8)&0x00FF00FF)|((l&0x00FF00FF)<<8)), \ + ROTATE(l,16) \ + ) +/* + * Originally the middle line started with l=(((l&0xFF00FF00)>>8)|... + * It's rewritten as above for two reasons: + * - RISCs aren't good at long constants and have to explicitely + * compose 'em with several (well, usually 2) instructions in a + * register before performing the actual operation and (as you + * already realized:-) having same constant should inspire the + * compiler to permanently allocate the only register for it; + * - most modern CPUs have two ALUs, but usually only one has + * circuitry for shifts:-( this minor tweak inspires compiler + * to schedule shift instructions in a better way... + * + * <appro@fy.chalmers.se> + */ +#endif +#endif + +#ifndef ROTATE +#define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n)))) +#endif + +/* + * Make some obvious choices. E.g., HASH_BLOCK_DATA_ORDER_ALIGNED + * and HASH_BLOCK_HOST_ORDER ought to be the same if input data + * and host are of the same "endianess". It's possible to mask + * this with blank #define HASH_BLOCK_DATA_ORDER though... + * + * <appro@fy.chalmers.se> + */ +#if defined(B_ENDIAN) +# if defined(DATA_ORDER_IS_BIG_ENDIAN) +# if !defined(HASH_BLOCK_DATA_ORDER_ALIGNED) && HASH_LONG_LOG2==2 +# define HASH_BLOCK_DATA_ORDER_ALIGNED HASH_BLOCK_HOST_ORDER +# endif +# endif +#elif defined(L_ENDIAN) +# if defined(DATA_ORDER_IS_LITTLE_ENDIAN) +# if !defined(HASH_BLOCK_DATA_ORDER_ALIGNED) && HASH_LONG_LOG2==2 +# define HASH_BLOCK_DATA_ORDER_ALIGNED HASH_BLOCK_HOST_ORDER +# endif +# endif +#endif + +#if !defined(HASH_BLOCK_DATA_ORDER_ALIGNED) +#ifndef HASH_BLOCK_DATA_ORDER +#error "HASH_BLOCK_DATA_ORDER must be defined!" +#endif +#endif + +#if defined(DATA_ORDER_IS_BIG_ENDIAN) + +#ifndef PEDANTIC +# if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) +# if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) + /* + * This gives ~30-40% performance improvement in SHA-256 compiled + * with gcc [on P4]. Well, first macro to be frank. We can pull + * this trick on x86* platforms only, because these CPUs can fetch + * unaligned data without raising an exception. + */ +# define HOST_c2l(c,l) ({ unsigned int r=*((const unsigned int *)(c)); \ + asm ("bswapl %0":"=r"(r):"0"(r)); \ + (c)+=4; (l)=r; }) +# define HOST_l2c(l,c) ({ unsigned int r=(l); \ + asm ("bswapl %0":"=r"(r):"0"(r)); \ + *((unsigned int *)(c))=r; (c)+=4; r; }) +# endif +# endif +#endif + +#ifndef HOST_c2l +#define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++)))<<24), \ + l|=(((unsigned long)(*((c)++)))<<16), \ + l|=(((unsigned long)(*((c)++)))<< 8), \ + l|=(((unsigned long)(*((c)++))) ), \ + l) +#endif +#define HOST_p_c2l(c,l,n) { \ + switch (n) { \ + case 0: l =((unsigned long)(*((c)++)))<<24; \ + case 1: l|=((unsigned long)(*((c)++)))<<16; \ + case 2: l|=((unsigned long)(*((c)++)))<< 8; \ + case 3: l|=((unsigned long)(*((c)++))); \ + } } +#define HOST_p_c2l_p(c,l,sc,len) { \ + switch (sc) { \ + case 0: l =((unsigned long)(*((c)++)))<<24; \ + if (--len == 0) break; \ + case 1: l|=((unsigned long)(*((c)++)))<<16; \ + if (--len == 0) break; \ + case 2: l|=((unsigned long)(*((c)++)))<< 8; \ + } } +/* NOTE the pointer is not incremented at the end of this */ +#define HOST_c2l_p(c,l,n) { \ + l=0; (c)+=n; \ + switch (n) { \ + case 3: l =((unsigned long)(*(--(c))))<< 8; \ + case 2: l|=((unsigned long)(*(--(c))))<<16; \ + case 1: l|=((unsigned long)(*(--(c))))<<24; \ + } } +#ifndef HOST_l2c +#define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \ + *((c)++)=(unsigned char)(((l)>>16)&0xff), \ + *((c)++)=(unsigned char)(((l)>> 8)&0xff), \ + *((c)++)=(unsigned char)(((l) )&0xff), \ + l) +#endif + +#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN) + +#if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) + /* See comment in DATA_ORDER_IS_BIG_ENDIAN section. */ +# define HOST_c2l(c,l) ((l)=*((const unsigned int *)(c)), (c)+=4, l) +# define HOST_l2c(l,c) (*((unsigned int *)(c))=(l), (c)+=4, l) +#endif + +#ifndef HOST_c2l +#define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++))) ), \ + l|=(((unsigned long)(*((c)++)))<< 8), \ + l|=(((unsigned long)(*((c)++)))<<16), \ + l|=(((unsigned long)(*((c)++)))<<24), \ + l) +#endif +#define HOST_p_c2l(c,l,n) { \ + switch (n) { \ + case 0: l =((unsigned long)(*((c)++))); \ + case 1: l|=((unsigned long)(*((c)++)))<< 8; \ + case 2: l|=((unsigned long)(*((c)++)))<<16; \ + case 3: l|=((unsigned long)(*((c)++)))<<24; \ + } } +#define HOST_p_c2l_p(c,l,sc,len) { \ + switch (sc) { \ + case 0: l =((unsigned long)(*((c)++))); \ + if (--len == 0) break; \ + case 1: l|=((unsigned long)(*((c)++)))<< 8; \ + if (--len == 0) break; \ + case 2: l|=((unsigned long)(*((c)++)))<<16; \ + } } +/* NOTE the pointer is not incremented at the end of this */ +#define HOST_c2l_p(c,l,n) { \ + l=0; (c)+=n; \ + switch (n) { \ + case 3: l =((unsigned long)(*(--(c))))<<16; \ + case 2: l|=((unsigned long)(*(--(c))))<< 8; \ + case 1: l|=((unsigned long)(*(--(c)))); \ + } } +#ifndef HOST_l2c +#define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ + *((c)++)=(unsigned char)(((l)>> 8)&0xff), \ + *((c)++)=(unsigned char)(((l)>>16)&0xff), \ + *((c)++)=(unsigned char)(((l)>>24)&0xff), \ + l) +#endif + +#endif + +/* + * Time for some action:-) + */ + +int HASH_UPDATE (HASH_CTX *c, const void *data_, size_t len) + { + const unsigned char *data=data_; + register HASH_LONG * p; + register HASH_LONG l; + size_t sw,sc,ew,ec; + + if (len==0) return 1; + + l=(c->Nl+(((HASH_LONG)len)<<3))&0xffffffffUL; + /* 95-05-24 eay Fixed a bug with the overflow handling, thanks to + * Wei Dai <weidai@eskimo.com> for pointing it out. */ + if (l < c->Nl) /* overflow */ + c->Nh++; + c->Nh+=(len>>29); /* might cause compiler warning on 16-bit */ + c->Nl=l; + + if (c->num != 0) + { + p=c->data; + sw=c->num>>2; + sc=c->num&0x03; + + if ((c->num+len) >= HASH_CBLOCK) + { + l=p[sw]; HOST_p_c2l(data,l,sc); p[sw++]=l; + for (; sw<HASH_LBLOCK; sw++) + { + HOST_c2l(data,l); p[sw]=l; + } + HASH_BLOCK_HOST_ORDER (c,p,1); + len-=(HASH_CBLOCK-c->num); + c->num=0; + /* drop through and do the rest */ + } + else + { + c->num+=(unsigned int)len; + if ((sc+len) < 4) /* ugly, add char's to a word */ + { + l=p[sw]; HOST_p_c2l_p(data,l,sc,len); p[sw]=l; + } + else + { + ew=(c->num>>2); + ec=(c->num&0x03); + if (sc) + l=p[sw]; + HOST_p_c2l(data,l,sc); + p[sw++]=l; + for (; sw < ew; sw++) + { + HOST_c2l(data,l); p[sw]=l; + } + if (ec) + { + HOST_c2l_p(data,l,ec); p[sw]=l; + } + } + return 1; + } + } + + sw=len/HASH_CBLOCK; + if (sw > 0) + { +#if defined(HASH_BLOCK_DATA_ORDER_ALIGNED) + /* + * Note that HASH_BLOCK_DATA_ORDER_ALIGNED gets defined + * only if sizeof(HASH_LONG)==4. + */ + if ((((size_t)data)%4) == 0) + { + /* data is properly aligned so that we can cast it: */ + HASH_BLOCK_DATA_ORDER_ALIGNED (c,(const HASH_LONG *)data,sw); + sw*=HASH_CBLOCK; + data+=sw; + len-=sw; + } + else +#if !defined(HASH_BLOCK_DATA_ORDER) + while (sw--) + { + memcpy (p=c->data,data,HASH_CBLOCK); + HASH_BLOCK_DATA_ORDER_ALIGNED(c,p,1); + data+=HASH_CBLOCK; + len-=HASH_CBLOCK; + } +#endif +#endif +#if defined(HASH_BLOCK_DATA_ORDER) + { + HASH_BLOCK_DATA_ORDER(c,data,sw); + sw*=HASH_CBLOCK; + data+=sw; + len-=sw; + } +#endif + } + + if (len!=0) + { + p = c->data; + c->num = len; + ew=len>>2; /* words to copy */ + ec=len&0x03; + for (; ew; ew--,p++) + { + HOST_c2l(data,l); *p=l; + } + HOST_c2l_p(data,l,ec); + *p=l; + } + return 1; + } + + +void HASH_TRANSFORM (HASH_CTX *c, const unsigned char *data) + { +#if defined(HASH_BLOCK_DATA_ORDER_ALIGNED) + if ((((size_t)data)%4) == 0) + /* data is properly aligned so that we can cast it: */ + HASH_BLOCK_DATA_ORDER_ALIGNED (c,(const HASH_LONG *)data,1); + else +#if !defined(HASH_BLOCK_DATA_ORDER) + { + memcpy (c->data,data,HASH_CBLOCK); + HASH_BLOCK_DATA_ORDER_ALIGNED (c,c->data,1); + } +#endif +#endif +#if defined(HASH_BLOCK_DATA_ORDER) + HASH_BLOCK_DATA_ORDER (c,data,1); +#endif + } + + +int HASH_FINAL (unsigned char *md, HASH_CTX *c) + { + register HASH_LONG *p; + register unsigned long l; + register int i,j; + static const unsigned char end[4]={0x80,0x00,0x00,0x00}; + const unsigned char *cp=end; + + /* c->num should definitly have room for at least one more byte. */ + p=c->data; + i=c->num>>2; + j=c->num&0x03; + +#if 0 + /* purify often complains about the following line as an + * Uninitialized Memory Read. While this can be true, the + * following p_c2l macro will reset l when that case is true. + * This is because j&0x03 contains the number of 'valid' bytes + * already in p[i]. If and only if j&0x03 == 0, the UMR will + * occur but this is also the only time p_c2l will do + * l= *(cp++) instead of l|= *(cp++) + * Many thanks to Alex Tang <altitude@cic.net> for pickup this + * 'potential bug' */ +#ifdef PURIFY + if (j==0) p[i]=0; /* Yeah, but that's not the way to fix it:-) */ +#endif + l=p[i]; +#else + l = (j==0) ? 0 : p[i]; +#endif + HOST_p_c2l(cp,l,j); p[i++]=l; /* i is the next 'undefined word' */ + + if (i>(HASH_LBLOCK-2)) /* save room for Nl and Nh */ + { + if (i<HASH_LBLOCK) p[i]=0; + HASH_BLOCK_HOST_ORDER (c,p,1); + i=0; + } + for (; i<(HASH_LBLOCK-2); i++) + p[i]=0; + +#if defined(DATA_ORDER_IS_BIG_ENDIAN) + p[HASH_LBLOCK-2]=c->Nh; + p[HASH_LBLOCK-1]=c->Nl; +#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN) + p[HASH_LBLOCK-2]=c->Nl; + p[HASH_LBLOCK-1]=c->Nh; +#endif + HASH_BLOCK_HOST_ORDER (c,p,1); + +#ifndef HASH_MAKE_STRING +#error "HASH_MAKE_STRING must be defined!" +#else + HASH_MAKE_STRING(c,md); +#endif + + c->num=0; + /* clear stuff, HASH_BLOCK may be leaving some stuff on the stack + * but I'm not worried :-) + OPENSSL_cleanse((void *)c,sizeof(HASH_CTX)); + */ + return 1; + } + +#ifndef MD32_REG_T +#define MD32_REG_T long +/* + * This comment was originaly written for MD5, which is why it + * discusses A-D. But it basically applies to all 32-bit digests, + * which is why it was moved to common header file. + * + * In case you wonder why A-D are declared as long and not + * as MD5_LONG. Doing so results in slight performance + * boost on LP64 architectures. The catch is we don't + * really care if 32 MSBs of a 64-bit register get polluted + * with eventual overflows as we *save* only 32 LSBs in + * *either* case. Now declaring 'em long excuses the compiler + * from keeping 32 MSBs zeroed resulting in 13% performance + * improvement under SPARC Solaris7/64 and 5% under AlphaLinux. + * Well, to be honest it should say that this *prevents* + * performance degradation. + * <appro@fy.chalmers.se> + * Apparently there're LP64 compilers that generate better + * code if A-D are declared int. Most notably GCC-x86_64 + * generates better code. + * <appro@fy.chalmers.se> + */ +#endif diff --git a/src/libutil/sha256.c b/src/libutil/sha256.c new file mode 100644 index 000000000..63ed0ba43 --- /dev/null +++ b/src/libutil/sha256.c @@ -0,0 +1,238 @@ +/* crypto/sha/sha256.c */ +/* ==================================================================== + * Copyright (c) 2004 The OpenSSL Project. All rights reserved + * according to the OpenSSL license [found in ./md32_common.h]. + * ==================================================================== + */ + +#include <stdlib.h> +#include <string.h> + +#include "sha256.h" + +int SHA224_Init (SHA256_CTX *c) + { + c->h[0]=0xc1059ed8UL; c->h[1]=0x367cd507UL; + c->h[2]=0x3070dd17UL; c->h[3]=0xf70e5939UL; + c->h[4]=0xffc00b31UL; c->h[5]=0x68581511UL; + c->h[6]=0x64f98fa7UL; c->h[7]=0xbefa4fa4UL; + c->Nl=0; c->Nh=0; + c->num=0; c->md_len=SHA224_DIGEST_LENGTH; + return 1; + } + +int SHA256_Init (SHA256_CTX *c) + { + c->h[0]=0x6a09e667UL; c->h[1]=0xbb67ae85UL; + c->h[2]=0x3c6ef372UL; c->h[3]=0xa54ff53aUL; + c->h[4]=0x510e527fUL; c->h[5]=0x9b05688cUL; + c->h[6]=0x1f83d9abUL; c->h[7]=0x5be0cd19UL; + c->Nl=0; c->Nh=0; + c->num=0; c->md_len=SHA256_DIGEST_LENGTH; + return 1; + } + +unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md) + { + SHA256_CTX c; + static unsigned char m[SHA224_DIGEST_LENGTH]; + + if (md == NULL) md=m; + SHA224_Init(&c); + SHA256_Update(&c,d,n); + SHA256_Final(md,&c); + return(md); + } + +unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md) + { + SHA256_CTX c; + static unsigned char m[SHA256_DIGEST_LENGTH]; + + if (md == NULL) md=m; + SHA256_Init(&c); + SHA256_Update(&c,d,n); + SHA256_Final(md,&c); + return(md); + } + +int SHA224_Update(SHA256_CTX *c, const void *data, size_t len) +{ return SHA256_Update (c,data,len); } +int SHA224_Final (unsigned char *md, SHA256_CTX *c) +{ return SHA256_Final (md,c); } + +#define DATA_ORDER_IS_BIG_ENDIAN + +#define HASH_LONG uint32_t +#define HASH_LONG_LOG2 2 +#define HASH_CTX SHA256_CTX +#define HASH_CBLOCK SHA_CBLOCK +#define HASH_LBLOCK SHA_LBLOCK +/* + * Note that FIPS180-2 discusses "Truncation of the Hash Function Output." + * default: case below covers for it. It's not clear however if it's + * permitted to truncate to amount of bytes not divisible by 4. I bet not, + * but if it is, then default: case shall be extended. For reference. + * Idea behind separate cases for pre-defined lenghts is to let the + * compiler decide if it's appropriate to unroll small loops. + */ +#define HASH_MAKE_STRING(c,s) do { \ + unsigned long ll; \ + unsigned int n; \ + switch ((c)->md_len) \ + { case SHA224_DIGEST_LENGTH: \ + for (n=0;n<SHA224_DIGEST_LENGTH/4;n++) \ + { ll=(c)->h[n]; HOST_l2c(ll,(s)); } \ + break; \ + case SHA256_DIGEST_LENGTH: \ + for (n=0;n<SHA256_DIGEST_LENGTH/4;n++) \ + { ll=(c)->h[n]; HOST_l2c(ll,(s)); } \ + break; \ + default: \ + if ((c)->md_len > SHA256_DIGEST_LENGTH) \ + return 0; \ + for (n=0;n<(c)->md_len/4;n++) \ + { ll=(c)->h[n]; HOST_l2c(ll,(s)); } \ + break; \ + } \ + } while (0) + +#define HASH_UPDATE SHA256_Update +#define HASH_TRANSFORM SHA256_Transform +#define HASH_FINAL SHA256_Final +#define HASH_BLOCK_HOST_ORDER sha256_block_host_order +#define HASH_BLOCK_DATA_ORDER sha256_block_data_order +void sha256_block_host_order (SHA256_CTX *ctx, const void *in, size_t num); +void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num); + +#include "md32_common.h" + +static const uint32_t K256[64] = { + 0x428a2f98UL,0x71374491UL,0xb5c0fbcfUL,0xe9b5dba5UL, + 0x3956c25bUL,0x59f111f1UL,0x923f82a4UL,0xab1c5ed5UL, + 0xd807aa98UL,0x12835b01UL,0x243185beUL,0x550c7dc3UL, + 0x72be5d74UL,0x80deb1feUL,0x9bdc06a7UL,0xc19bf174UL, + 0xe49b69c1UL,0xefbe4786UL,0x0fc19dc6UL,0x240ca1ccUL, + 0x2de92c6fUL,0x4a7484aaUL,0x5cb0a9dcUL,0x76f988daUL, + 0x983e5152UL,0xa831c66dUL,0xb00327c8UL,0xbf597fc7UL, + 0xc6e00bf3UL,0xd5a79147UL,0x06ca6351UL,0x14292967UL, + 0x27b70a85UL,0x2e1b2138UL,0x4d2c6dfcUL,0x53380d13UL, + 0x650a7354UL,0x766a0abbUL,0x81c2c92eUL,0x92722c85UL, + 0xa2bfe8a1UL,0xa81a664bUL,0xc24b8b70UL,0xc76c51a3UL, + 0xd192e819UL,0xd6990624UL,0xf40e3585UL,0x106aa070UL, + 0x19a4c116UL,0x1e376c08UL,0x2748774cUL,0x34b0bcb5UL, + 0x391c0cb3UL,0x4ed8aa4aUL,0x5b9cca4fUL,0x682e6ff3UL, + 0x748f82eeUL,0x78a5636fUL,0x84c87814UL,0x8cc70208UL, + 0x90befffaUL,0xa4506cebUL,0xbef9a3f7UL,0xc67178f2UL }; + +/* + * FIPS specification refers to right rotations, while our ROTATE macro + * is left one. This is why you might notice that rotation coefficients + * differ from those observed in FIPS document by 32-N... + */ +#define Sigma0(x) (ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10)) +#define Sigma1(x) (ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7)) +#define sigma0(x) (ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3)) +#define sigma1(x) (ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10)) + +#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) +#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) + +#define ROUND_00_15(i,a,b,c,d,e,f,g,h) do { \ + T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i]; \ + h = Sigma0(a) + Maj(a,b,c); \ + d += T1; h += T1; } while (0) + +#define ROUND_16_63(i,a,b,c,d,e,f,g,h,X) do { \ + s0 = X[(i+1)&0x0f]; s0 = sigma0(s0); \ + s1 = X[(i+14)&0x0f]; s1 = sigma1(s1); \ + T1 = X[(i)&0x0f] += s0 + s1 + X[(i+9)&0x0f]; \ + ROUND_00_15(i,a,b,c,d,e,f,g,h); } while (0) + +static void sha256_block (SHA256_CTX *ctx, const void *in, size_t num, int host) + { + uint32_t a,b,c,d,e,f,g,h,s0,s1,T1; + uint32_t X[16]; + int i; + const unsigned char *data=in; + + while (num--) { + + a = ctx->h[0]; b = ctx->h[1]; c = ctx->h[2]; d = ctx->h[3]; + e = ctx->h[4]; f = ctx->h[5]; g = ctx->h[6]; h = ctx->h[7]; + + if (host) + { + const uint32_t *W=(const uint32_t *)data; + + T1 = X[0] = W[0]; ROUND_00_15(0,a,b,c,d,e,f,g,h); + T1 = X[1] = W[1]; ROUND_00_15(1,h,a,b,c,d,e,f,g); + T1 = X[2] = W[2]; ROUND_00_15(2,g,h,a,b,c,d,e,f); + T1 = X[3] = W[3]; ROUND_00_15(3,f,g,h,a,b,c,d,e); + T1 = X[4] = W[4]; ROUND_00_15(4,e,f,g,h,a,b,c,d); + T1 = X[5] = W[5]; ROUND_00_15(5,d,e,f,g,h,a,b,c); + T1 = X[6] = W[6]; ROUND_00_15(6,c,d,e,f,g,h,a,b); + T1 = X[7] = W[7]; ROUND_00_15(7,b,c,d,e,f,g,h,a); + T1 = X[8] = W[8]; ROUND_00_15(8,a,b,c,d,e,f,g,h); + T1 = X[9] = W[9]; ROUND_00_15(9,h,a,b,c,d,e,f,g); + T1 = X[10] = W[10]; ROUND_00_15(10,g,h,a,b,c,d,e,f); + T1 = X[11] = W[11]; ROUND_00_15(11,f,g,h,a,b,c,d,e); + T1 = X[12] = W[12]; ROUND_00_15(12,e,f,g,h,a,b,c,d); + T1 = X[13] = W[13]; ROUND_00_15(13,d,e,f,g,h,a,b,c); + T1 = X[14] = W[14]; ROUND_00_15(14,c,d,e,f,g,h,a,b); + T1 = X[15] = W[15]; ROUND_00_15(15,b,c,d,e,f,g,h,a); + + data += SHA256_CBLOCK; + } + else + { + uint32_t l; + + HOST_c2l(data,l); T1 = X[0] = l; ROUND_00_15(0,a,b,c,d,e,f,g,h); + HOST_c2l(data,l); T1 = X[1] = l; ROUND_00_15(1,h,a,b,c,d,e,f,g); + HOST_c2l(data,l); T1 = X[2] = l; ROUND_00_15(2,g,h,a,b,c,d,e,f); + HOST_c2l(data,l); T1 = X[3] = l; ROUND_00_15(3,f,g,h,a,b,c,d,e); + HOST_c2l(data,l); T1 = X[4] = l; ROUND_00_15(4,e,f,g,h,a,b,c,d); + HOST_c2l(data,l); T1 = X[5] = l; ROUND_00_15(5,d,e,f,g,h,a,b,c); + HOST_c2l(data,l); T1 = X[6] = l; ROUND_00_15(6,c,d,e,f,g,h,a,b); + HOST_c2l(data,l); T1 = X[7] = l; ROUND_00_15(7,b,c,d,e,f,g,h,a); + HOST_c2l(data,l); T1 = X[8] = l; ROUND_00_15(8,a,b,c,d,e,f,g,h); + HOST_c2l(data,l); T1 = X[9] = l; ROUND_00_15(9,h,a,b,c,d,e,f,g); + HOST_c2l(data,l); T1 = X[10] = l; ROUND_00_15(10,g,h,a,b,c,d,e,f); + HOST_c2l(data,l); T1 = X[11] = l; ROUND_00_15(11,f,g,h,a,b,c,d,e); + HOST_c2l(data,l); T1 = X[12] = l; ROUND_00_15(12,e,f,g,h,a,b,c,d); + HOST_c2l(data,l); T1 = X[13] = l; ROUND_00_15(13,d,e,f,g,h,a,b,c); + HOST_c2l(data,l); T1 = X[14] = l; ROUND_00_15(14,c,d,e,f,g,h,a,b); + HOST_c2l(data,l); T1 = X[15] = l; ROUND_00_15(15,b,c,d,e,f,g,h,a); + } + + for (i=16;i<64;i+=8) + { + ROUND_16_63(i+0,a,b,c,d,e,f,g,h,X); + ROUND_16_63(i+1,h,a,b,c,d,e,f,g,X); + ROUND_16_63(i+2,g,h,a,b,c,d,e,f,X); + ROUND_16_63(i+3,f,g,h,a,b,c,d,e,X); + ROUND_16_63(i+4,e,f,g,h,a,b,c,d,X); + ROUND_16_63(i+5,d,e,f,g,h,a,b,c,X); + ROUND_16_63(i+6,c,d,e,f,g,h,a,b,X); + ROUND_16_63(i+7,b,c,d,e,f,g,h,a,X); + } + + ctx->h[0] += a; ctx->h[1] += b; ctx->h[2] += c; ctx->h[3] += d; + ctx->h[4] += e; ctx->h[5] += f; ctx->h[6] += g; ctx->h[7] += h; + + } + } + +/* + * Idea is to trade couple of cycles for some space. On IA-32 we save + * about 4K in "big footprint" case. In "small footprint" case any gain + * is appreciated:-) + */ +void HASH_BLOCK_HOST_ORDER (SHA256_CTX *ctx, const void *in, size_t num) +{ sha256_block (ctx,in,num,1); } + +void HASH_BLOCK_DATA_ORDER (SHA256_CTX *ctx, const void *in, size_t num) +{ sha256_block (ctx,in,num,0); } + + diff --git a/src/libutil/sha256.h b/src/libutil/sha256.h new file mode 100644 index 000000000..39b301342 --- /dev/null +++ b/src/libutil/sha256.h @@ -0,0 +1,35 @@ +#ifndef _SHA256_H +#define _SHA256_H 1 + +#include <stdint.h> + +#define SHA_LBLOCK 16 +#define SHA_CBLOCK (SHA_LBLOCK*4) /* SHA treats input data as a + * contiguous array of 32 bit + * wide big-endian values. */ + +#define SHA256_CBLOCK (SHA_LBLOCK*4) /* SHA-256 treats input data as a + * contiguous array of 32 bit + * wide big-endian values. */ +#define SHA224_DIGEST_LENGTH 28 +#define SHA256_DIGEST_LENGTH 32 + +typedef struct SHA256state_st + { + uint32_t h[8]; + uint32_t Nl,Nh; + uint32_t data[SHA_LBLOCK]; + unsigned int num,md_len; + } SHA256_CTX; + +int SHA224_Init(SHA256_CTX *c); +int SHA224_Update(SHA256_CTX *c, const void *data, size_t len); +int SHA224_Final(unsigned char *md, SHA256_CTX *c); +unsigned char *SHA224(const unsigned char *d, size_t n,unsigned char *md); +int SHA256_Init(SHA256_CTX *c); +int SHA256_Update(SHA256_CTX *c, const void *data, size_t len); +int SHA256_Final(unsigned char *md, SHA256_CTX *c); +unsigned char *SHA256(const unsigned char *d, size_t n,unsigned char *md); +void SHA256_Transform(SHA256_CTX *c, const unsigned char *data); + +#endif diff --git a/src/nix-hash/nix-hash.cc b/src/nix-hash/nix-hash.cc index 6a044972a..360e07960 100644 --- a/src/nix-hash/nix-hash.cc +++ b/src/nix-hash/nix-hash.cc @@ -25,6 +25,7 @@ void run(Strings args) if (i == args.end()) throw UsageError("`--type' requires an argument"); if (*i == "md5") ht = htMD5; else if (*i == "sha1") ht = htSHA1; + else if (*i == "sha256") ht = htSHA256; else throw UsageError(format("unknown hash type `%1%'") % *i); } else |