| /* |
| chronyd/chronyc - Programs for keeping computer clocks accurate. |
| |
| ********************************************************************** |
| * Copyright (C) Miroslav Lichvar 2012 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * 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., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| * |
| ********************************************************************** |
| |
| ======================================================================= |
| |
| Routines implementing crypto hashing using NSSLOWHASH API of the NSS library. |
| |
| */ |
| |
| #include "config.h" |
| |
| #include <nss.h> |
| #include <hasht.h> |
| #include <nsslowhash.h> |
| |
| #include "hash.h" |
| #include "util.h" |
| |
| static NSSLOWInitContext *ictx; |
| |
| struct hash { |
| HASH_HashType type; |
| HSH_Algorithm algorithm; |
| NSSLOWHASHContext *context; |
| }; |
| |
| static struct hash hashes[] = { |
| { HASH_AlgMD5, HSH_MD5, NULL }, |
| { HASH_AlgSHA1, HSH_SHA1, NULL }, |
| { HASH_AlgSHA256, HSH_SHA256, NULL }, |
| { HASH_AlgSHA384, HSH_SHA384, NULL }, |
| { HASH_AlgSHA512, HSH_SHA512, NULL }, |
| { 0, 0, NULL } |
| }; |
| |
| int |
| HSH_GetHashId(HSH_Algorithm algorithm) |
| { |
| int i; |
| |
| if (algorithm == HSH_MD5_NONCRYPTO) |
| algorithm = HSH_MD5; |
| |
| for (i = 0; hashes[i].algorithm != 0; i++) { |
| if (hashes[i].algorithm == algorithm) |
| break; |
| } |
| |
| if (hashes[i].algorithm == 0) |
| return -1; /* not found */ |
| |
| if (!ictx && !(ictx = NSSLOW_Init())) |
| return -1; /* couldn't init NSS */ |
| |
| if (!hashes[i].context && |
| !(hashes[i].context = NSSLOWHASH_NewContext(ictx, hashes[i].type))) |
| return -1; /* couldn't init hash */ |
| |
| return i; |
| } |
| |
| int |
| HSH_Hash(int id, const void *in1, int in1_len, const void *in2, int in2_len, |
| unsigned char *out, int out_len) |
| { |
| unsigned char buf[MAX_HASH_LENGTH]; |
| unsigned int ret = 0; |
| |
| if (in1_len < 0 || in2_len < 0 || out_len < 0) |
| return 0; |
| |
| NSSLOWHASH_Begin(hashes[id].context); |
| NSSLOWHASH_Update(hashes[id].context, in1, in1_len); |
| if (in2) |
| NSSLOWHASH_Update(hashes[id].context, in2, in2_len); |
| NSSLOWHASH_End(hashes[id].context, buf, &ret, sizeof (buf)); |
| |
| ret = MIN(ret, out_len); |
| memcpy(out, buf, ret); |
| |
| return ret; |
| } |
| |
| void |
| HSH_Finalise(void) |
| { |
| int i; |
| |
| for (i = 0; hashes[i].algorithm != 0; i++) { |
| if (hashes[i].context) |
| NSSLOWHASH_Destroy(hashes[i].context); |
| } |
| |
| if (ictx) |
| NSSLOW_Shutdown(ictx); |
| } |