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message_guid.c
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/* message_guid.c -- GUID manipulation
*
* Copyright (c) 1994-2008 Carnegie Mellon University. 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. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any legal
* details, please contact
* Carnegie Mellon University
* Center for Technology Transfer and Enterprise Creation
* 4615 Forbes Avenue
* Suite 302
* Pittsburgh, PA 15213
* (412) 268-7393, fax: (412) 268-7395
* innovation@andrew.cmu.edu
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* $Id: message_guid.c,v 1.9 2010/01/06 17:01:37 murch Exp $
*/
#include <config.h>
#include <string.h>
#include <ctype.h>
#include "assert.h"
#include "global.h"
#include "message_guid.h"
#include "util.h"
#ifdef HAVE_SSL
#include <openssl/sha.h>
#define our_sha1 SHA1
#else
/*
* sha1.c
*
* Originally witten by Steve Reid <steve@edmweb.com>
*
* Modified by Aaron D. Gifford <agifford@infowest.com>
*
* NO COPYRIGHT - THIS IS 100% IN THE PUBLIC DOMAIN
*
* The original unmodified version is available at:
* ftp://ftp.funet.fi/pub/crypt/hash/sha/sha1.c
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS ``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(S) 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.
*/
/* to limit changes to the code below, set up the right types here */
typedef uint32_t sha1_quadbyte; /* 4 byte type */
typedef uint8_t sha1_byte; /* single byte type */
#define SHA1_BLOCK_LENGTH 64
#define SHA1_DIGEST_LENGTH 20
/* The SHA1 structure: */
typedef struct _SHA_CTX {
sha1_quadbyte state[5];
sha1_quadbyte count[2];
sha1_byte buffer[SHA1_BLOCK_LENGTH];
} SHA_CTX;
/* Downloaded from http://www.aarongifford.com/computers/hmac_sha1.tar.gz
* by Bron Gondwana <brong@fastmail.fm> on 2011-09-20
*/
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
/* blk0() and blk() perform the initial expand. */
/* I got the idea of expanding during the round function from SSLeay */
#ifdef LITTLE_ENDIAN
#define blk0(i) (block->l[i] = (rol(block->l[i],24)&(sha1_quadbyte)0xFF00FF00) \
|(rol(block->l[i],8)&(sha1_quadbyte)0x00FF00FF))
#else
#define blk0(i) block->l[i]
#endif
#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
^block->l[(i+2)&15]^block->l[i&15],1))
/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
typedef union _BYTE64QUAD16 {
sha1_byte c[64];
sha1_quadbyte l[16];
} BYTE64QUAD16;
/* Hash a single 512-bit block. This is the core of the algorithm. */
static void SHA1_Transform(sha1_quadbyte state[5], const sha1_byte buffer[64]) {
sha1_quadbyte a, b, c, d, e;
BYTE64QUAD16 *block;
BYTE64QUAD16 copy;
/* take a copy of the data */
memcpy(&copy, buffer, 64);
block = &copy;
/* Copy context->state[] to working vars */
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
/* 4 rounds of 20 operations each. Loop unrolled. */
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
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);
/* Add the working vars back into context.state[] */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
/* Wipe variables */
a = b = c = d = e = 0;
}
/* SHA1_Init - Initialize new context */
static void SHA1_Init(SHA_CTX* context) {
/* SHA1 initialization constants */
context->state[0] = 0x67452301;
context->state[1] = 0xEFCDAB89;
context->state[2] = 0x98BADCFE;
context->state[3] = 0x10325476;
context->state[4] = 0xC3D2E1F0;
context->count[0] = context->count[1] = 0;
}
/* Run your data through this. */
static void SHA1_Update(SHA_CTX *context, const sha1_byte *data, unsigned int len) {
unsigned int i, j;
j = (context->count[0] >> 3) & 63;
if ((context->count[0] += len << 3) < (len << 3)) context->count[1]++;
context->count[1] += (len >> 29);
if ((j + len) > 63) {
memcpy(&context->buffer[j], data, (i = 64-j));
SHA1_Transform(context->state, context->buffer);
for ( ; i + 63 < len; i += 64) {
SHA1_Transform(context->state, &data[i]);
}
j = 0;
}
else i = 0;
memcpy(&context->buffer[j], &data[i], len - i);
}
/* Add padding and return the message digest. */
static void SHA1_Final(sha1_byte digest[SHA1_DIGEST_LENGTH], SHA_CTX *context) {
sha1_quadbyte i, j;
sha1_byte finalcount[8];
for (i = 0; i < 8; i++) {
finalcount[i] = (sha1_byte)((context->count[(i >= 4 ? 0 : 1)]
>> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */
}
SHA1_Update(context, (sha1_byte *)"\200", 1);
while ((context->count[0] & 504) != 448) {
SHA1_Update(context, (sha1_byte *)"\0", 1);
}
/* Should cause a SHA1_Transform() */
SHA1_Update(context, finalcount, 8);
for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
digest[i] = (sha1_byte)
((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
}
/* Wipe variables */
i = j = 0;
memset(context->buffer, 0, SHA1_BLOCK_LENGTH);
memset(context->state, 0, SHA1_DIGEST_LENGTH);
memset(context->count, 0, 8);
memset(&finalcount, 0, 8);
}
static void our_sha1(const unsigned char *buf, unsigned long len,
sha1_byte dest[SHA1_DIGEST_LENGTH])
{
SHA_CTX ctx;
memset(&ctx, 0, sizeof(SHA_CTX));
SHA1_Init(&ctx);
SHA1_Update(&ctx, buf, len);
SHA1_Final(dest, &ctx);
}
#endif
/* Four possible forms of Message GUID:
*
* Private:
* Used for internal manipulation. Not visible to clients.
*
* Public:
* Opaque handle to GUID that Cyrus can pass around.
*
* OR
*
* Byte sequence of known length (MESSAGE_GUID_SIZE) which can
* be stored on disk.
*
* Textual:
* Textual represenatation for Message GUID for passing over the wire
* Currently BASE64 string + '\0'.
*
*/
/* ====================================================================== */
/* Public interface */
/* message_guid_generate() ***********************************************
*
* Generate GUID from message
*
************************************************************************/
EXPORTED void message_guid_generate(struct message_guid *guid,
const char *msg_base, unsigned long msg_len)
{
guid->status = GUID_NULL;
memset(guid->value, 0, MESSAGE_GUID_SIZE);
guid->status = GUID_NONNULL;
our_sha1((const unsigned char *) msg_base, msg_len, guid->value);
}
/* message_guid_copy() ***************************************************
*
* Copy GUID
*
************************************************************************/
EXPORTED void message_guid_copy(struct message_guid *dst, const struct message_guid *src)
{
memcpy(dst, src, sizeof(struct message_guid));
}
/* message_guid_equal() **************************************************
*
* Compare a pair of GUIDs: Returns 1 => match.
*
************************************************************************/
EXPORTED int message_guid_equal(struct message_guid *g1,
struct message_guid *g2)
{
return (memcmp(g1->value, g2->value, MESSAGE_GUID_SIZE) == 0);
}
EXPORTED int message_guid_cmp(struct message_guid *g1,
struct message_guid *g2)
{
return memcmp(g1->value, g2->value, MESSAGE_GUID_SIZE);
}
/* message_guid_hash() ***************************************************
*
* Convert GUID into hash value for hash table lookup
* Returns: positive int in range [0, hash_size-1]
*
************************************************************************/
EXPORTED unsigned long message_guid_hash(const struct message_guid *guid, int hash_size)
{
int i;
unsigned long result = 0;
const unsigned char *s = &guid->value[0];
assert(hash_size > 1);
if (hash_size > 1024) {
/* Pair up chars to get 16 bit values */
for (i = 0; i < MESSAGE_GUID_SIZE; i += 2)
result += (s[i] << 8) + s[i+1];
}
else
for (i = 0; i < MESSAGE_GUID_SIZE; i++)
result += s[i];
return (result % hash_size);
}
/* message_guid_set_null() ***********************************************
*
* Create NULL GUID
*
************************************************************************/
EXPORTED void message_guid_set_null(struct message_guid *guid)
{
guid->status = GUID_NULL;
memset(guid->value, 0, MESSAGE_GUID_SIZE);
}
/* message_guid_isnull() ************************************************
*
* Returns: 1 if GUID is NULL value
*
************************************************************************/
EXPORTED int message_guid_isnull(struct message_guid *guid)
{
if (guid->status == GUID_UNKNOWN) {
unsigned char *p = guid->value;
int i;
for (i = 0; (i < MESSAGE_GUID_SIZE) && !*p++; i++);
guid->status = (i == MESSAGE_GUID_SIZE) ? GUID_NULL : GUID_NONNULL;
}
return(guid->status == GUID_NULL);
}
/* message_guid_export() *************************************************
*
* Export Message GUID as byte sequence (MESSAGE_GUID_SIZE)
* (Wrapper for memcpy() with current implementation)
*
************************************************************************/
EXPORTED void message_guid_export(const struct message_guid *guid, unsigned char *buf)
{
memcpy(buf, guid->value, MESSAGE_GUID_SIZE);
}
/* message_guid_import() *************************************************
*
* Import Message GUID from byte sequence (MESSAGE_GUID_SIZE)
* (Wrapper for memcpy() with current implementation)
*
************************************************************************/
EXPORTED void message_guid_import(struct message_guid *guid,
const unsigned char *buf)
{
assert(guid);
guid->status = GUID_UNKNOWN;
memcpy(guid->value, buf, MESSAGE_GUID_SIZE);
}
/* Routines for manipulating text value (ASCII hex encoding) */
/* message_guid_encode() *************************************************
*
* Returns ptr to '\0' terminated static char * which can be strdup()ed
* NULL => error. Should be impossible as entire range covered
*
************************************************************************/
EXPORTED char *message_guid_encode(const struct message_guid *guid)
{
static char text[2*MESSAGE_GUID_SIZE+1];
int r = bin_to_hex(&guid->value, MESSAGE_GUID_SIZE, text, BH_LOWER);
assert(r == 2*MESSAGE_GUID_SIZE);
return text;
}
/* message_guid_decode() *************************************************
*
* Sets Message GUID from text form. Returns 1 if valid
* Returns: boolean success
*
************************************************************************/
EXPORTED int message_guid_decode(struct message_guid *guid, const char *text)
{
int r = hex_to_bin(text, 0, &guid->value);
guid->status = (r > 0 ? GUID_NONNULL : GUID_NULL);
return (r == MESSAGE_GUID_SIZE);
}

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