--- /dev/null
+/*
+ * 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 Netscape are
+ * Copyright (C) 1994-2000 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License Version 2 or later (the
+ * "GPL"), in which case the provisions of the GPL are applicable
+ * instead of those above. If you wish to allow use of your
+ * version of this file only under the terms of the GPL and not to
+ * allow others to use your version of this file under the MPL,
+ * indicate your decision by deleting the provisions above and
+ * replace them with the notice and other provisions required by
+ * the GPL. If you do not delete the provisions above, a recipient
+ * may use your version of this file under either the MPL or the
+ * GPL.
+ */
+
+/*
+ * CMS message methods.
+ */
+
+#include <Security/SecCmsMessage.h>
+
+#include <Security/SecCmsContentInfo.h>
+#include <Security/SecCmsSignedData.h>
+
+#include "cmslocal.h"
+
+#include "SecAsn1Item.h"
+#include "secoid.h"
+
+#include <security_asn1/secasn1.h>
+#include <security_asn1/secerr.h>
+#include <security_asn1/secport.h>
+
+/*
+ * SecCmsMessageCreate - create a CMS message object
+ *
+ * "poolp" - arena to allocate memory from, or NULL if new arena should be created
+ */
+SecCmsMessageRef
+SecCmsMessageCreate(void)
+{
+ PLArenaPool *poolp;
+ SecCmsMessageRef cmsg;
+
+ poolp = PORT_NewArena (1024); /* XXX what is right value? */
+ if (poolp == NULL)
+ return NULL;
+
+ cmsg = (SecCmsMessageRef)PORT_ArenaZAlloc (poolp, sizeof(SecCmsMessage));
+ if (cmsg == NULL) {
+ PORT_FreeArena(poolp, PR_FALSE);
+ return NULL;
+ }
+
+ cmsg->poolp = poolp;
+ cmsg->contentInfo.cmsg = cmsg;
+ cmsg->refCount = 1;
+
+ return cmsg;
+}
+
+/*
+ * SecCmsMessageSetEncodingParams - set up a CMS message object for encoding or decoding
+ *
+ * "cmsg" - message object
+ * "pwfn", pwfn_arg" - callback function for getting token password
+ * "decrypt_key_cb", "decrypt_key_cb_arg" - callback function for getting bulk key for encryptedData
+ * "detached_digestalgs", "detached_digests" - digests from detached content
+ */
+void
+SecCmsMessageSetEncodingParams(SecCmsMessageRef cmsg,
+ PK11PasswordFunc pwfn, void *pwfn_arg,
+ SecCmsGetDecryptKeyCallback decrypt_key_cb, void *decrypt_key_cb_arg)
+{
+#if 0
+ // @@@ Deal with password stuff.
+ if (pwfn)
+ PK11_SetPasswordFunc(pwfn);
+#endif
+ cmsg->pwfn_arg = pwfn_arg;
+ cmsg->decrypt_key_cb = decrypt_key_cb;
+ cmsg->decrypt_key_cb_arg = decrypt_key_cb_arg;
+}
+
+/*
+ * SecCmsMessageDestroy - destroy a CMS message and all of its sub-pieces.
+ */
+void
+SecCmsMessageDestroy(SecCmsMessageRef cmsg)
+{
+ PORT_Assert (cmsg->refCount > 0);
+ if (cmsg->refCount <= 0) /* oops */
+ return;
+
+ cmsg->refCount--; /* thread safety? */
+ if (cmsg->refCount > 0)
+ return;
+
+ SecCmsContentInfoDestroy(&(cmsg->contentInfo));
+
+ PORT_FreeArena (cmsg->poolp, PR_FALSE); /* XXX clear it? */
+}
+
+/*
+ * SecCmsMessageCopy - return a copy of the given message.
+ *
+ * The copy may be virtual or may be real -- either way, the result needs
+ * to be passed to SecCmsMessageDestroy later (as does the original).
+ */
+SecCmsMessageRef
+SecCmsMessageCopy(SecCmsMessageRef cmsg)
+{
+ if (cmsg == NULL)
+ return NULL;
+
+ PORT_Assert (cmsg->refCount > 0);
+
+ cmsg->refCount++; /* XXX chrisk thread safety? */
+ return cmsg;
+}
+
+/*
+ * SecCmsMessageGetContentInfo - return a pointer to the top level contentInfo
+ */
+SecCmsContentInfoRef
+SecCmsMessageGetContentInfo(SecCmsMessageRef cmsg)
+{
+ return &(cmsg->contentInfo);
+}
+
+/*
+ * Return a pointer to the actual content.
+ * In the case of those types which are encrypted, this returns the *plain* content.
+ * In case of nested contentInfos, this descends and retrieves the innermost content.
+ */
+const SecAsn1Item *
+SecCmsMessageGetContent(SecCmsMessageRef cmsg)
+{
+ /* this is a shortcut */
+ SecCmsContentInfoRef cinfo = SecCmsMessageGetContentInfo(cmsg);
+ const SecAsn1Item *pItem = SecCmsContentInfoGetInnerContent(cinfo);
+ return pItem;
+}
+
+/*
+ * SecCmsMessageContentLevelCount - count number of levels of CMS content objects in this message
+ *
+ * CMS data content objects do not count.
+ */
+int
+SecCmsMessageContentLevelCount(SecCmsMessageRef cmsg)
+{
+ int count = 0;
+ SecCmsContentInfoRef cinfo;
+
+ /* walk down the chain of contentinfos */
+ for (cinfo = &(cmsg->contentInfo); cinfo != NULL; ) {
+ count++;
+ cinfo = SecCmsContentInfoGetChildContentInfo(cinfo);
+ }
+ return count;
+}
+
+/*
+ * SecCmsMessageContentLevel - find content level #n
+ *
+ * CMS data content objects do not count.
+ */
+SecCmsContentInfoRef
+SecCmsMessageContentLevel(SecCmsMessageRef cmsg, int n)
+{
+ int count = 0;
+ SecCmsContentInfoRef cinfo;
+
+ /* walk down the chain of contentinfos */
+ for (cinfo = &(cmsg->contentInfo); cinfo != NULL && count < n; cinfo = SecCmsContentInfoGetChildContentInfo(cinfo)) {
+ count++;
+ }
+
+ return cinfo;
+}
+
+/*
+ * SecCmsMessageContainsCertsOrCrls - see if message contains certs along the way
+ */
+Boolean
+SecCmsMessageContainsCertsOrCrls(SecCmsMessageRef cmsg)
+{
+ SecCmsContentInfoRef cinfo;
+
+ /* descend into CMS message */
+ for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = SecCmsContentInfoGetChildContentInfo(cinfo)) {
+ if (SecCmsContentInfoGetContentTypeTag(cinfo) != SEC_OID_PKCS7_SIGNED_DATA)
+ continue; /* next level */
+
+ if (SecCmsSignedDataContainsCertsOrCrls(cinfo->content.signedData))
+ return PR_TRUE;
+ }
+ return PR_FALSE;
+}
+
+/*
+ * SecCmsMessageIsEncrypted - see if message contains a encrypted submessage
+ */
+Boolean
+SecCmsMessageIsEncrypted(SecCmsMessageRef cmsg)
+{
+ SecCmsContentInfoRef cinfo;
+
+ /* walk down the chain of contentinfos */
+ for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = SecCmsContentInfoGetChildContentInfo(cinfo))
+ {
+ switch (SecCmsContentInfoGetContentTypeTag(cinfo)) {
+ case SEC_OID_PKCS7_ENVELOPED_DATA:
+ case SEC_OID_PKCS7_ENCRYPTED_DATA:
+ return PR_TRUE;
+ default:
+ break;
+ }
+ }
+ return PR_FALSE;
+}
+
+/*
+ * SecCmsMessageIsSigned - see if message contains a signed submessage
+ *
+ * If the CMS message has a SignedData with a signature (not just a SignedData)
+ * return true; false otherwise. This can/should be called before calling
+ * VerifySignature, which will always indicate failure if no signature is
+ * present, but that does not mean there even was a signature!
+ * Note that the content itself can be empty (detached content was sent
+ * another way); it is the presence of the signature that matters.
+ */
+Boolean
+SecCmsMessageIsSigned(SecCmsMessageRef cmsg)
+{
+ SecCmsContentInfoRef cinfo;
+
+ /* walk down the chain of contentinfos */
+ for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = SecCmsContentInfoGetChildContentInfo(cinfo))
+ {
+ switch (SecCmsContentInfoGetContentTypeTag(cinfo)) {
+ case SEC_OID_PKCS7_SIGNED_DATA:
+ if (!SecCmsArrayIsEmpty((void **)cinfo->content.signedData->signerInfos))
+ return PR_TRUE;
+ break;
+ default:
+ break;
+ }
+ }
+ return PR_FALSE;
+}
+
+/*
+ * SecCmsMessageIsContentEmpty - see if content is empty
+ *
+ * returns PR_TRUE is innermost content length is < minLen
+ * XXX need the encrypted content length (why?)
+ */
+Boolean
+SecCmsMessageIsContentEmpty(SecCmsMessageRef cmsg, unsigned int minLen)
+{
+ SecAsn1Item * item = NULL;
+
+ if (cmsg == NULL)
+ return PR_TRUE;
+
+ item = SecCmsContentInfoGetContent(SecCmsMessageGetContentInfo(cmsg));
+
+ if (!item) {
+ return PR_TRUE;
+ } else if(item->Length <= minLen) {
+ return PR_TRUE;
+ }
+
+ return PR_FALSE;
+}
projects / apple / security.git / blobdiff