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457 lines
10 KiB
C
457 lines
10 KiB
C
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape security libraries.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1994-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "cert.h"
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#include "secpkcs7.h"
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#include "base64.h"
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#include "secitem.h"
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#include "secder.h"
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#include "secasn1.h"
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#include "secoid.h"
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#include "secerr.h"
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SEC_ASN1_MKSUB(SEC_AnyTemplate)
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SECStatus
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SEC_ReadPKCS7Certs(SECItem *pkcs7Item, CERTImportCertificateFunc f, void *arg)
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{
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SEC_PKCS7ContentInfo *contentInfo = NULL;
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SECStatus rv;
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SECItem **certs;
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int count;
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contentInfo = SEC_PKCS7DecodeItem(pkcs7Item, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL);
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if ( contentInfo == NULL ) {
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goto loser;
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}
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if ( SEC_PKCS7ContentType (contentInfo) != SEC_OID_PKCS7_SIGNED_DATA ) {
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goto loser;
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}
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certs = contentInfo->content.signedData->rawCerts;
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if ( certs ) {
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count = 0;
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while ( *certs ) {
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count++;
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certs++;
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}
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rv = (* f)(arg, contentInfo->content.signedData->rawCerts, count);
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}
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rv = SECSuccess;
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goto done;
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loser:
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rv = SECFailure;
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done:
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if ( contentInfo ) {
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SEC_PKCS7DestroyContentInfo(contentInfo);
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}
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return(rv);
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}
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const SEC_ASN1Template SEC_CertSequenceTemplate[] = {
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{ SEC_ASN1_SEQUENCE_OF | SEC_ASN1_XTRN, 0, SEC_ASN1_SUB(SEC_AnyTemplate) }
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};
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SECStatus
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SEC_ReadCertSequence(SECItem *certsItem, CERTImportCertificateFunc f, void *arg)
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{
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SECStatus rv;
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SECItem **certs;
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int count;
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SECItem **rawCerts = NULL;
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PRArenaPool *arena;
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SEC_PKCS7ContentInfo *contentInfo = NULL;
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arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
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if (arena == NULL) {
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return SECFailure;
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}
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contentInfo = SEC_PKCS7DecodeItem(certsItem, NULL, NULL, NULL, NULL, NULL,
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NULL, NULL);
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if ( contentInfo == NULL ) {
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goto loser;
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}
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if ( SEC_PKCS7ContentType (contentInfo) != SEC_OID_NS_TYPE_CERT_SEQUENCE ) {
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goto loser;
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}
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rv = SEC_QuickDERDecodeItem(arena, &rawCerts, SEC_CertSequenceTemplate,
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contentInfo->content.data);
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if (rv != SECSuccess) {
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goto loser;
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}
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certs = rawCerts;
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if ( certs ) {
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count = 0;
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while ( *certs ) {
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count++;
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certs++;
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}
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rv = (* f)(arg, rawCerts, count);
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}
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rv = SECSuccess;
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goto done;
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loser:
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rv = SECFailure;
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done:
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if ( contentInfo ) {
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SEC_PKCS7DestroyContentInfo(contentInfo);
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}
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if ( arena ) {
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PORT_FreeArena(arena, PR_FALSE);
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}
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return(rv);
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}
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CERTCertificate *
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CERT_ConvertAndDecodeCertificate(char *certstr)
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{
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CERTCertificate *cert;
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SECStatus rv;
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SECItem der;
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rv = ATOB_ConvertAsciiToItem(&der, certstr);
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if (rv != SECSuccess)
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return NULL;
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cert = CERT_NewTempCertificate(CERT_GetDefaultCertDB(),
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&der, NULL, PR_FALSE, PR_TRUE);
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PORT_Free(der.data);
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return cert;
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}
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static const char NS_CERT_HEADER[] = "-----BEGIN CERTIFICATE-----";
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static const char NS_CERT_TRAILER[] = "-----END CERTIFICATE-----";
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#define NS_CERT_HEADER_LEN ((sizeof NS_CERT_HEADER) - 1)
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#define NS_CERT_TRAILER_LEN ((sizeof NS_CERT_TRAILER) - 1)
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static const char CERTIFICATE_TYPE_STRING[] = "certificate";
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#define CERTIFICATE_TYPE_LEN (sizeof(CERTIFICATE_TYPE_STRING)-1)
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/*
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* read an old style ascii or binary certificate chain
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*/
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SECStatus
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CERT_DecodeCertPackage(char *certbuf,
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int certlen,
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CERTImportCertificateFunc f,
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void *arg)
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{
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unsigned char *cp;
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unsigned char *bincert = NULL;
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char * ascCert = NULL;
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SECStatus rv;
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if ( certbuf == NULL ) {
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return(SECFailure);
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}
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cp = (unsigned char *)certbuf;
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/* is a DER encoded certificate of some type? */
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if ( ( *cp & 0x1f ) == SEC_ASN1_SEQUENCE ) {
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SECItem certitem;
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SECItem *pcertitem = &certitem;
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int seqLen, seqLenLen;
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cp++;
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if ( *cp & 0x80) {
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/* Multibyte length */
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seqLenLen = cp[0] & 0x7f;
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switch (seqLenLen) {
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case 4:
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seqLen = ((unsigned long)cp[1]<<24) |
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((unsigned long)cp[2]<<16) | (cp[3]<<8) | cp[4];
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break;
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case 3:
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seqLen = ((unsigned long)cp[1]<<16) | (cp[2]<<8) | cp[3];
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break;
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case 2:
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seqLen = (cp[1]<<8) | cp[2];
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break;
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case 1:
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seqLen = cp[1];
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break;
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default:
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/* indefinite length */
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seqLen = 0;
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}
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cp += ( seqLenLen + 1 );
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} else {
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seqLenLen = 0;
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seqLen = *cp;
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cp++;
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}
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/* check entire length if definite length */
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if ( seqLen || seqLenLen ) {
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if ( certlen != ( seqLen + seqLenLen + 2 ) ) {
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if (certlen > ( seqLen + seqLenLen + 2 ))
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PORT_SetError(SEC_ERROR_EXTRA_INPUT);
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else
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PORT_SetError(SEC_ERROR_INPUT_LEN);
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goto notder;
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}
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}
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/* check the type string */
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/* netscape wrapped DER cert */
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if ( ( cp[0] == SEC_ASN1_OCTET_STRING ) &&
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( cp[1] == CERTIFICATE_TYPE_LEN ) &&
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( PORT_Strcmp((char *)&cp[2], CERTIFICATE_TYPE_STRING) ) ) {
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cp += ( CERTIFICATE_TYPE_LEN + 2 );
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/* it had better be a certificate by now!! */
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certitem.data = cp;
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certitem.len = certlen - ( cp - (unsigned char *)certbuf );
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rv = (* f)(arg, &pcertitem, 1);
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return(rv);
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} else if ( cp[0] == SEC_ASN1_OBJECT_ID ) {
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SECOidData *oiddata;
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SECItem oiditem;
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/* XXX - assume DER encoding of OID len!! */
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oiditem.len = cp[1];
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oiditem.data = (unsigned char *)&cp[2];
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oiddata = SECOID_FindOID(&oiditem);
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if ( oiddata == NULL ) {
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return(SECFailure);
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}
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certitem.data = (unsigned char*)certbuf;
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certitem.len = certlen;
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switch ( oiddata->offset ) {
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case SEC_OID_PKCS7_SIGNED_DATA:
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return(SEC_ReadPKCS7Certs(&certitem, f, arg));
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break;
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case SEC_OID_NS_TYPE_CERT_SEQUENCE:
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return(SEC_ReadCertSequence(&certitem, f, arg));
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break;
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default:
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break;
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}
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} else {
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/* it had better be a certificate by now!! */
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certitem.data = (unsigned char*)certbuf;
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certitem.len = certlen;
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rv = (* f)(arg, &pcertitem, 1);
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return(rv);
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}
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}
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/* now look for a netscape base64 ascii encoded cert */
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notder:
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{
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unsigned char *certbegin = NULL;
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unsigned char *certend = NULL;
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char *pc;
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int cl;
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/* Convert the ASCII data into a nul-terminated string */
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ascCert = (char *)PORT_Alloc(certlen + 1);
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if (!ascCert) {
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rv = SECFailure;
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goto loser;
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}
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PORT_Memcpy(ascCert, certbuf, certlen);
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ascCert[certlen] = '\0';
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pc = PORT_Strchr(ascCert, '\n'); /* find an EOL */
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if (!pc) { /* maybe this is a MAC file */
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pc = ascCert;
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while (*pc && NULL != (pc = PORT_Strchr(pc, '\r'))) {
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*pc++ = '\n';
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}
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}
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cp = (unsigned char *)ascCert;
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cl = certlen;
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/* find the beginning marker */
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while ( cl > NS_CERT_HEADER_LEN ) {
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int found = 0;
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if ( !PORT_Strncasecmp((char *)cp, NS_CERT_HEADER,
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NS_CERT_HEADER_LEN) ) {
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cl -= NS_CERT_HEADER_LEN;
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cp += NS_CERT_HEADER_LEN;
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found = 1;
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}
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/* skip to next eol */
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while ( cl && ( *cp != '\n' )) {
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cp++;
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cl--;
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}
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/* skip all blank lines */
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while ( cl && ( *cp == '\n' || *cp == '\r' )) {
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cp++;
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cl--;
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}
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if (cl && found) {
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certbegin = cp;
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break;
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}
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}
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if ( certbegin ) {
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/* find the ending marker */
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while ( cl >= NS_CERT_TRAILER_LEN ) {
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if ( !PORT_Strncasecmp((char *)cp, NS_CERT_TRAILER,
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NS_CERT_TRAILER_LEN) ) {
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certend = (unsigned char *)cp;
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break;
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}
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/* skip to next eol */
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while ( cl && ( *cp != '\n' )) {
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cp++;
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cl--;
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}
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/* skip all blank lines */
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while ( cl && ( *cp == '\n' || *cp == '\r' )) {
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cp++;
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cl--;
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}
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}
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}
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if ( certbegin && certend ) {
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unsigned int binLen;
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*certend = 0;
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/* convert to binary */
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bincert = ATOB_AsciiToData(certbegin, &binLen);
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if (!bincert) {
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rv = SECFailure;
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goto loser;
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}
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/* now recurse to decode the binary */
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rv = CERT_DecodeCertPackage((char *)bincert, binLen, f, arg);
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} else {
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PORT_SetError(SEC_ERROR_BAD_DER);
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rv = SECFailure;
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}
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}
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loser:
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if ( bincert ) {
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PORT_Free(bincert);
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}
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if ( ascCert ) {
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PORT_Free(ascCert);
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}
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return(rv);
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}
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typedef struct {
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PRArenaPool *arena;
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SECItem cert;
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} collect_args;
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static SECStatus
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collect_certs(void *arg, SECItem **certs, int numcerts)
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{
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SECStatus rv;
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collect_args *collectArgs;
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collectArgs = (collect_args *)arg;
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rv = SECITEM_CopyItem(collectArgs->arena, &collectArgs->cert, *certs);
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return(rv);
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}
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/*
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* read an old style ascii or binary certificate
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*/
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CERTCertificate *
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CERT_DecodeCertFromPackage(char *certbuf, int certlen)
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{
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collect_args collectArgs;
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SECStatus rv;
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CERTCertificate *cert = NULL;
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collectArgs.arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
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rv = CERT_DecodeCertPackage(certbuf, certlen, collect_certs,
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(void *)&collectArgs);
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if ( rv == SECSuccess ) {
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cert = CERT_NewTempCertificate(CERT_GetDefaultCertDB(),
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&collectArgs.cert, NULL,
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PR_FALSE, PR_TRUE);
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}
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PORT_FreeArena(collectArgs.arena, PR_FALSE);
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return(cert);
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}
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