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Diffstat (limited to 'security/nss/lib/smime/cmsdigest.c')
-rw-r--r--security/nss/lib/smime/cmsdigest.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/security/nss/lib/smime/cmsdigest.c b/security/nss/lib/smime/cmsdigest.c
new file mode 100644
index 000000000..e0e923a77
--- /dev/null
+++ b/security/nss/lib/smime/cmsdigest.c
@@ -0,0 +1,294 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape security libraries.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1994-2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+ * CMS digesting.
+ *
+ * $Id$
+ */
+
+#include "cmslocal.h"
+
+#include "cert.h"
+#include "key.h"
+#include "secitem.h"
+#include "secoid.h"
+#include "pk11func.h"
+#include "prtime.h"
+#include "secerr.h"
+
+/* #define CMS_FIND_LEAK_MULTIPLE 1 */
+#ifdef CMS_FIND_LEAK_MULTIPLE
+static int stop_on_err = 1;
+static int global_num_digests = 0;
+#endif
+
+struct digestPairStr {
+ const SECHashObject * digobj;
+ void * digcx;
+};
+typedef struct digestPairStr digestPair;
+
+struct NSSCMSDigestContextStr {
+ PRBool saw_contents;
+ PLArenaPool * pool;
+ int digcnt;
+ digestPair * digPairs;
+};
+
+
+/*
+ * NSS_CMSDigestContext_StartMultiple - start digest calculation using all the
+ * digest algorithms in "digestalgs" in parallel.
+ */
+NSSCMSDigestContext *
+NSS_CMSDigestContext_StartMultiple(SECAlgorithmID **digestalgs)
+{
+ PLArenaPool * pool;
+ NSSCMSDigestContext *cmsdigcx;
+ int digcnt;
+ int i;
+
+#ifdef CMS_FIND_LEAK_MULTIPLE
+ PORT_Assert(global_num_digests == 0 || !stop_on_err);
+#endif
+
+ digcnt = (digestalgs == NULL) ? 0 : NSS_CMSArray_Count((void **)digestalgs);
+ /* It's OK if digcnt is zero. We have to allow this for "certs only"
+ ** messages.
+ */
+ pool = PORT_NewArena(2048);
+ if (!pool)
+ return NULL;
+
+ cmsdigcx = PORT_ArenaNew(pool, NSSCMSDigestContext);
+ if (cmsdigcx == NULL)
+ goto loser;
+
+ cmsdigcx->saw_contents = PR_FALSE;
+ cmsdigcx->pool = pool;
+ cmsdigcx->digcnt = digcnt;
+
+ cmsdigcx->digPairs = PORT_ArenaZNewArray(pool, digestPair, digcnt);
+ if (cmsdigcx->digPairs == NULL) {
+ goto loser;
+ }
+
+ /*
+ * Create a digest object context for each algorithm.
+ */
+ for (i = 0; i < digcnt; i++) {
+ const SECHashObject *digobj;
+ void *digcx;
+
+ digobj = NSS_CMSUtil_GetHashObjByAlgID(digestalgs[i]);
+ /*
+ * Skip any algorithm we do not even recognize; obviously,
+ * this could be a problem, but if it is critical then the
+ * result will just be that the signature does not verify.
+ * We do not necessarily want to error out here, because
+ * the particular algorithm may not actually be important,
+ * but we cannot know that until later.
+ */
+ if (digobj == NULL)
+ continue;
+
+ digcx = (*digobj->create)();
+ if (digcx != NULL) {
+ (*digobj->begin) (digcx);
+ cmsdigcx->digPairs[i].digobj = digobj;
+ cmsdigcx->digPairs[i].digcx = digcx;
+#ifdef CMS_FIND_LEAK_MULTIPLE
+ global_num_digests++;
+#endif
+ }
+ }
+ return cmsdigcx;
+
+loser:
+ /* no digest objects have been created, or need to be destroyed. */
+ if (pool) {
+ PORT_FreeArena(pool, PR_FALSE);
+ }
+ return NULL;
+}
+
+/*
+ * NSS_CMSDigestContext_StartSingle - same as
+ * NSS_CMSDigestContext_StartMultiple, but only one algorithm.
+ */
+NSSCMSDigestContext *
+NSS_CMSDigestContext_StartSingle(SECAlgorithmID *digestalg)
+{
+ SECAlgorithmID *digestalgs[] = { NULL, NULL }; /* fake array */
+
+ digestalgs[0] = digestalg;
+ return NSS_CMSDigestContext_StartMultiple(digestalgs);
+}
+
+/*
+ * NSS_CMSDigestContext_Update - feed more data into the digest machine
+ */
+void
+NSS_CMSDigestContext_Update(NSSCMSDigestContext *cmsdigcx,
+ const unsigned char *data, int len)
+{
+ int i;
+ digestPair *pair = cmsdigcx->digPairs;
+
+ cmsdigcx->saw_contents = PR_TRUE;
+
+ for (i = 0; i < cmsdigcx->digcnt; i++, pair++) {
+ if (pair->digcx) {
+ (*pair->digobj->update)(pair->digcx, data, len);
+ }
+ }
+}
+
+/*
+ * NSS_CMSDigestContext_Cancel - cancel digesting operation
+ */
+void
+NSS_CMSDigestContext_Cancel(NSSCMSDigestContext *cmsdigcx)
+{
+ int i;
+ digestPair *pair = cmsdigcx->digPairs;
+
+ for (i = 0; i < cmsdigcx->digcnt; i++, pair++) {
+ if (pair->digcx) {
+ (*pair->digobj->destroy)(pair->digcx, PR_TRUE);
+#ifdef CMS_FIND_LEAK_MULTIPLE
+ --global_num_digests;
+#endif
+ }
+ }
+#ifdef CMS_FIND_LEAK_MULTIPLE
+ PORT_Assert(global_num_digests == 0 || !stop_on_err);
+#endif
+ PORT_FreeArena(cmsdigcx->pool, PR_FALSE);
+}
+
+/*
+ * NSS_CMSDigestContext_FinishMultiple - finish the digests and put them
+ * into an array of SECItems (allocated on poolp)
+ */
+SECStatus
+NSS_CMSDigestContext_FinishMultiple(NSSCMSDigestContext *cmsdigcx,
+ PLArenaPool *poolp,
+ SECItem ***digestsp)
+{
+ SECItem ** digests = NULL;
+ digestPair *pair;
+ void * mark;
+ int i;
+ SECStatus rv;
+
+ /* no contents? do not finish digests */
+ if (digestsp == NULL || !cmsdigcx->saw_contents) {
+ rv = SECSuccess;
+ goto cleanup;
+ }
+
+ mark = PORT_ArenaMark (poolp);
+
+ /* allocate digest array & SECItems on arena */
+ digests = PORT_ArenaNewArray( poolp, SECItem *, cmsdigcx->digcnt + 1);
+
+ rv = ((digests == NULL) ? SECFailure : SECSuccess);
+ pair = cmsdigcx->digPairs;
+ for (i = 0; rv == SECSuccess && i < cmsdigcx->digcnt; i++, pair++) {
+ SECItem digest;
+ unsigned char hash[HASH_LENGTH_MAX];
+
+ if (!pair->digcx) {
+ digests[i] = NULL;
+ continue;
+ }
+
+ digest.type = siBuffer;
+ digest.data = hash;
+ digest.len = pair->digobj->length;
+ (* pair->digobj->end)(pair->digcx, hash, &digest.len, digest.len);
+ digests[i] = SECITEM_ArenaDupItem(poolp, &digest);
+ if (!digests[i]) {
+ rv = SECFailure;
+ }
+ }
+ digests[i] = NULL;
+ if (rv == SECSuccess) {
+ PORT_ArenaUnmark(poolp, mark);
+ } else
+ PORT_ArenaRelease(poolp, mark);
+
+cleanup:
+ NSS_CMSDigestContext_Cancel(cmsdigcx);
+ /* Don't change the caller's digests pointer if we have no digests.
+ ** NSS_CMSSignedData_Encode_AfterData depends on this behavior.
+ */
+ if (rv == SECSuccess && digestsp && digests) {
+ *digestsp = digests;
+ }
+ return rv;
+}
+
+/*
+ * NSS_CMSDigestContext_FinishSingle - same as
+ * NSS_CMSDigestContext_FinishMultiple, but for one digest.
+ */
+SECStatus
+NSS_CMSDigestContext_FinishSingle(NSSCMSDigestContext *cmsdigcx,
+ PLArenaPool *poolp,
+ SECItem *digest)
+{
+ SECStatus rv = SECFailure;
+ SECItem **dp;
+ PLArenaPool *arena = NULL;
+
+ if ((arena = PORT_NewArena(1024)) == NULL)
+ goto loser;
+
+ /* get the digests into arena, then copy the first digest into poolp */
+ rv = NSS_CMSDigestContext_FinishMultiple(cmsdigcx, arena, &dp);
+ if (rv == SECSuccess) {
+ /* now copy it into poolp */
+ rv = SECITEM_CopyItem(poolp, digest, dp[0]);
+ }
+loser:
+ if (arena)
+ PORT_FreeArena(arena, PR_FALSE);
+
+ return rv;
+}
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