104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Miroslav Lichvar 2012
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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**********************************************************************
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=======================================================================
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Routines implementing crypto hashing using NSSLOWHASH API of the NSS library.
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*/
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#include "config.h"
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#include <nss.h>
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#include <hasht.h>
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#include <nsslowhash.h>
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#include "hash.h"
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static NSSLOWInitContext *ictx;
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struct hash {
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HASH_HashType type;
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const char *name;
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NSSLOWHASHContext *context;
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};
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static struct hash hashes[] = {
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{ HASH_AlgMD5, "MD5", NULL },
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{ HASH_AlgSHA1, "SHA1", NULL },
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{ HASH_AlgSHA256, "SHA256", NULL },
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{ HASH_AlgSHA384, "SHA384", NULL },
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{ HASH_AlgSHA512, "SHA512", NULL },
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{ 0, NULL, NULL }
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};
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int
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HSH_GetHashId(const char *name)
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{
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int i;
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for (i = 0; hashes[i].name; i++) {
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if (!strcmp(name, hashes[i].name))
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break;
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}
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if (!hashes[i].name)
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return -1; /* not found */
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if (!ictx && !(ictx = NSSLOW_Init()))
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return -1; /* couldn't init NSS */
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if (!hashes[i].context &&
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!(hashes[i].context = NSSLOWHASH_NewContext(ictx, hashes[i].type)))
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return -1; /* couldn't init hash */
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return i;
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}
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unsigned int
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HSH_Hash(int id, const unsigned char *in1, unsigned int in1_len,
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const unsigned char *in2, unsigned int in2_len,
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unsigned char *out, unsigned int out_len)
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{
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unsigned int ret;
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NSSLOWHASH_Begin(hashes[id].context);
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NSSLOWHASH_Update(hashes[id].context, in1, in1_len);
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if (in2)
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NSSLOWHASH_Update(hashes[id].context, in2, in2_len);
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NSSLOWHASH_End(hashes[id].context, out, &ret, out_len);
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return ret;
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}
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void
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HSH_Finalise(void)
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{
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int i;
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for (i = 0; hashes[i].name; i++) {
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if (hashes[i].context)
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NSSLOWHASH_Destroy(hashes[i].context);
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}
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if (ictx)
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NSSLOW_Shutdown(ictx);
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}
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