secplcy.c
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上传日期:2007-01-12
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文件大小:3k
- /*
- * 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.
- */
- #include "secplcy.h"
- #include "prmem.h"
- SECCipherFind *sec_CipherFindInit(PRBool onlyAllowed,
- secCPStruct *policy,
- long *ciphers)
- {
- SECCipherFind *find = PR_NEWZAP(SECCipherFind);
- if (find)
- {
- find->policy = policy;
- find->ciphers = ciphers;
- find->onlyAllowed = onlyAllowed;
- find->index = -1;
- }
- return find;
- }
- long sec_CipherFindNext(SECCipherFind *find)
- {
- char *policy;
- long rv = -1;
- secCPStruct *policies = (secCPStruct *) find->policy;
- long *ciphers = (long *) find->ciphers;
- long numCiphers = policies->num_ciphers;
- find->index++;
- while((find->index < numCiphers) && (rv == -1))
- {
- /* Translate index to cipher. */
- rv = ciphers[find->index];
- /* If we're only looking for allowed ciphers, and if this
- cipher isn't allowed, loop around.*/
- if (find->onlyAllowed)
- {
- /* Find the appropriate policy flag. */
- policy = (&(policies->begin_ciphers)) + find->index + 1;
- /* If this cipher isn't allowed by policy, continue. */
- if (! (*policy))
- {
- rv = -1;
- find->index++;
- }
- }
- }
- return rv;
- }
- char sec_IsCipherAllowed(long cipher, secCPStruct *policies,
- long *ciphers)
- {
- char result = SEC_CIPHER_NOT_ALLOWED; /* our default answer */
- long numCiphers = policies->num_ciphers;
- char *policy;
- int i;
-
- /* Convert the cipher number into a policy flag location. */
- for (i=0, policy=(&(policies->begin_ciphers) + 1);
- i<numCiphers;
- i++, policy++)
- {
- if (cipher == ciphers[i])
- break;
- }
- if (i < numCiphers)
- {
- /* Found the cipher, get the policy value. */
- result = *policy;
- }
- return result;
- }
- void sec_CipherFindEnd(SECCipherFind *find)
- {
- PR_FREEIF(find);
- }