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/*
* $Id: store_key_md5.cc,v 1.36 2007/11/15 16:47:35 wessels Exp $
*
* DEBUG: section 20 Storage Manager MD5 Cache Keys
* AUTHOR: Duane Wessels
*
* SQUID Web Proxy Cache http://www.squid-cache.org/
* ----------------------------------------------------------
*
* Squid is the result of efforts by numerous individuals from
* the Internet community; see the CONTRIBUTORS file for full
* details. Many organizations have provided support for Squid's
* development; see the SPONSORS file for full details. Squid is
* Copyrighted (C) 2001 by the Regents of the University of
* California; see the COPYRIGHT file for full details. Squid
* incorporates software developed and/or copyrighted by other
* sources; see the CREDITS file for full details.
*
* 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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
*/
#include "squid.h"
#include "HttpRequest.h"
static cache_key null_key[SQUID_MD5_DIGEST_LENGTH];
const char *
storeKeyText(const cache_key *key)
{
static char buf[SQUID_MD5_DIGEST_LENGTH * 2+1];
int i;
for (i = 0; i < SQUID_MD5_DIGEST_LENGTH; i++)
snprintf(&buf[i*2],sizeof(buf) - i*2, "%02X", *(key + i));
return buf;
}
const cache_key *
storeKeyScan(const char *buf)
{
static unsigned char digest[SQUID_MD5_DIGEST_LENGTH];
int i;
int j = 0;
char t[3];
for (i = 0; i < SQUID_MD5_DIGEST_LENGTH; i++) {
t[0] = *(buf + (j++));
t[1] = *(buf + (j++));
t[2] = '\0';
*(digest + i) = (unsigned char) strtol(t, NULL, 16);
}
return digest;
}
int
storeKeyHashCmp(const void *a, const void *b)
{
const unsigned char *A = (const unsigned char *)a;
const unsigned char *B = (const unsigned char *)b;
int i;
for (i = 0; i < SQUID_MD5_DIGEST_LENGTH; i++) {
if (A[i] < B[i])
return -1;
if (A[i] > B[i])
return 1;
}
return 0;
}
unsigned int
storeKeyHashHash(const void *key, unsigned int n)
{
/* note, n must be a power of 2! */
const unsigned char *digest = (const unsigned char *)key;
unsigned int i = digest[0]
| digest[1] << 8
| digest[2] << 16
| digest[3] << 24;
return (i & (--n));
}
const cache_key *
storeKeyPrivate(const char *url, method_t method, int id)
{
static cache_key digest[SQUID_MD5_DIGEST_LENGTH];
SquidMD5_CTX M;
assert(id > 0);
debugs(20, 3, "storeKeyPrivate: " << RequestMethodStr[method] << " " << url);
SquidMD5Init(&M);
SquidMD5Update(&M, (unsigned char *) &id, sizeof(id));
SquidMD5Update(&M, (unsigned char *) &method, sizeof(method));
SquidMD5Update(&M, (unsigned char *) url, strlen(url));
SquidMD5Final(digest, &M);
return digest;
}
const cache_key *
storeKeyPublic(const char *url, const method_t method)
{
static cache_key digest[SQUID_MD5_DIGEST_LENGTH];
unsigned char m = (unsigned char) method;
SquidMD5_CTX M;
SquidMD5Init(&M);
SquidMD5Update(&M, &m, sizeof(m));
SquidMD5Update(&M, (unsigned char *) url, strlen(url));
SquidMD5Final(digest, &M);
return digest;
}
const cache_key *
storeKeyPublicByRequest(HttpRequest * request)
{
return storeKeyPublicByRequestMethod(request, request->method);
}
const cache_key *
storeKeyPublicByRequestMethod(HttpRequest * request, const method_t method)
{
static cache_key digest[SQUID_MD5_DIGEST_LENGTH];
unsigned char m = (unsigned char) method;
const char *url = urlCanonical(request);
SquidMD5_CTX M;
SquidMD5Init(&M);
SquidMD5Update(&M, &m, sizeof(m));
SquidMD5Update(&M, (unsigned char *) url, strlen(url));
if (request->vary_headers)
SquidMD5Update(&M, (unsigned char *) request->vary_headers, strlen(request->vary_headers));
SquidMD5Final(digest, &M);
return digest;
}
cache_key *
storeKeyDup(const cache_key * key)
{
cache_key *dup = (cache_key *)memAllocate(MEM_MD5_DIGEST);
xmemcpy(dup, key, SQUID_MD5_DIGEST_LENGTH);
return dup;
}
cache_key *
storeKeyCopy(cache_key * dst, const cache_key * src)
{
xmemcpy(dst, src, SQUID_MD5_DIGEST_LENGTH);
return dst;
}
void
storeKeyFree(const cache_key * key)
{
memFree((void *) key, MEM_MD5_DIGEST);
}
int
storeKeyHashBuckets(int nbuckets)
{
int n = 0x2000;
while (n < nbuckets)
n <<= 1;
return n;
}
int
storeKeyNull(const cache_key * key)
{
if (memcmp(key, null_key, SQUID_MD5_DIGEST_LENGTH) == 0)
return 1;
else
return 0;
}
void
storeKeyInit(void)
{
memset(null_key, '\0', SQUID_MD5_DIGEST_LENGTH);
}
|