1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/nss/lib/util/secdig.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,181 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +#include "secdig.h"
1.8 +
1.9 +#include "secoid.h"
1.10 +#include "secasn1.h"
1.11 +#include "secerr.h"
1.12 +
1.13 +/*
1.14 + * XXX Want to have a SGN_DecodeDigestInfo, like:
1.15 + * SGNDigestInfo *SGN_DecodeDigestInfo(SECItem *didata);
1.16 + * that creates a pool and allocates from it and decodes didata into
1.17 + * the newly allocated DigestInfo structure. Then fix secvfy.c (it
1.18 + * will no longer need an arena itself) to call this and then call
1.19 + * DestroyDigestInfo when it is done, then can remove the old template
1.20 + * above and keep our new template static and "hidden".
1.21 + */
1.22 +
1.23 +/*
1.24 + * XXX It might be nice to combine the following two functions (create
1.25 + * and encode). I think that is all anybody ever wants to do anyway.
1.26 + */
1.27 +
1.28 +SECItem *
1.29 +SGN_EncodeDigestInfo(PLArenaPool *poolp, SECItem *dest, SGNDigestInfo *diginfo)
1.30 +{
1.31 + return SEC_ASN1EncodeItem (poolp, dest, diginfo, sgn_DigestInfoTemplate);
1.32 +}
1.33 +
1.34 +SGNDigestInfo *
1.35 +SGN_CreateDigestInfo(SECOidTag algorithm, const unsigned char *sig,
1.36 + unsigned len)
1.37 +{
1.38 + SGNDigestInfo *di;
1.39 + SECStatus rv;
1.40 + PLArenaPool *arena;
1.41 + SECItem *null_param;
1.42 + SECItem dummy_value;
1.43 +
1.44 + switch (algorithm) {
1.45 + case SEC_OID_MD2:
1.46 + case SEC_OID_MD5:
1.47 + case SEC_OID_SHA1:
1.48 + case SEC_OID_SHA224:
1.49 + case SEC_OID_SHA256:
1.50 + case SEC_OID_SHA384:
1.51 + case SEC_OID_SHA512:
1.52 + break;
1.53 + default:
1.54 + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
1.55 + return NULL;
1.56 + }
1.57 +
1.58 + arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
1.59 + if (arena == NULL) {
1.60 + return NULL;
1.61 + }
1.62 +
1.63 + di = (SGNDigestInfo *) PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo));
1.64 + if (di == NULL) {
1.65 + PORT_FreeArena(arena, PR_FALSE);
1.66 + return NULL;
1.67 + }
1.68 +
1.69 + di->arena = arena;
1.70 +
1.71 + /*
1.72 + * PKCS #1 specifies that the AlgorithmID must have a NULL parameter
1.73 + * (as opposed to no parameter at all).
1.74 + */
1.75 + dummy_value.data = NULL;
1.76 + dummy_value.len = 0;
1.77 + null_param = SEC_ASN1EncodeItem(NULL, NULL, &dummy_value, SEC_NullTemplate);
1.78 + if (null_param == NULL) {
1.79 + goto loser;
1.80 + }
1.81 +
1.82 + rv = SECOID_SetAlgorithmID(arena, &di->digestAlgorithm, algorithm,
1.83 + null_param);
1.84 +
1.85 + SECITEM_FreeItem(null_param, PR_TRUE);
1.86 +
1.87 + if (rv != SECSuccess) {
1.88 + goto loser;
1.89 + }
1.90 +
1.91 + di->digest.data = (unsigned char *) PORT_ArenaAlloc(arena, len);
1.92 + if (di->digest.data == NULL) {
1.93 + goto loser;
1.94 + }
1.95 +
1.96 + di->digest.len = len;
1.97 + PORT_Memcpy(di->digest.data, sig, len);
1.98 + return di;
1.99 +
1.100 + loser:
1.101 + SGN_DestroyDigestInfo(di);
1.102 + return NULL;
1.103 +}
1.104 +
1.105 +SGNDigestInfo *
1.106 +SGN_DecodeDigestInfo(SECItem *didata)
1.107 +{
1.108 + PLArenaPool *arena;
1.109 + SGNDigestInfo *di;
1.110 + SECStatus rv = SECFailure;
1.111 + SECItem diCopy = {siBuffer, NULL, 0};
1.112 +
1.113 + arena = PORT_NewArena(SEC_ASN1_DEFAULT_ARENA_SIZE);
1.114 + if(arena == NULL)
1.115 + return NULL;
1.116 +
1.117 + rv = SECITEM_CopyItem(arena, &diCopy, didata);
1.118 + if (rv != SECSuccess) {
1.119 + PORT_FreeArena(arena, PR_FALSE);
1.120 + return NULL;
1.121 + }
1.122 +
1.123 + di = (SGNDigestInfo *)PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo));
1.124 + if (di != NULL) {
1.125 + di->arena = arena;
1.126 + rv = SEC_QuickDERDecodeItem(arena, di, sgn_DigestInfoTemplate, &diCopy);
1.127 + }
1.128 +
1.129 + if ((di == NULL) || (rv != SECSuccess)) {
1.130 + PORT_FreeArena(arena, PR_FALSE);
1.131 + di = NULL;
1.132 + }
1.133 +
1.134 + return di;
1.135 +}
1.136 +
1.137 +void
1.138 +SGN_DestroyDigestInfo(SGNDigestInfo *di)
1.139 +{
1.140 + if (di && di->arena) {
1.141 + PORT_FreeArena(di->arena, PR_FALSE);
1.142 + }
1.143 +
1.144 + return;
1.145 +}
1.146 +
1.147 +SECStatus
1.148 +SGN_CopyDigestInfo(PLArenaPool *poolp, SGNDigestInfo *a, SGNDigestInfo *b)
1.149 +{
1.150 + SECStatus rv;
1.151 + void *mark;
1.152 +
1.153 + if((poolp == NULL) || (a == NULL) || (b == NULL))
1.154 + return SECFailure;
1.155 +
1.156 + mark = PORT_ArenaMark(poolp);
1.157 + a->arena = poolp;
1.158 + rv = SECOID_CopyAlgorithmID(poolp, &a->digestAlgorithm,
1.159 + &b->digestAlgorithm);
1.160 + if (rv == SECSuccess)
1.161 + rv = SECITEM_CopyItem(poolp, &a->digest, &b->digest);
1.162 +
1.163 + if (rv != SECSuccess) {
1.164 + PORT_ArenaRelease(poolp, mark);
1.165 + } else {
1.166 + PORT_ArenaUnmark(poolp, mark);
1.167 + }
1.168 +
1.169 + return rv;
1.170 +}
1.171 +
1.172 +SECComparison
1.173 +SGN_CompareDigestInfo(SGNDigestInfo *a, SGNDigestInfo *b)
1.174 +{
1.175 + SECComparison rv;
1.176 +
1.177 + /* Check signature algorithm's */
1.178 + rv = SECOID_CompareAlgorithmID(&a->digestAlgorithm, &b->digestAlgorithm);
1.179 + if (rv) return rv;
1.180 +
1.181 + /* Compare signature block length's */
1.182 + rv = SECITEM_CompareItem(&a->digest, &b->digest);
1.183 + return rv;
1.184 +}
