cmsutil.c
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上传日期:2007-01-12
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文件大小:11k
- /*
- * 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 miscellaneous utility functions.
- *
- * $Id: cmsutil.c,v 1.3 2000/09/29 16:38:11 mcgreer%netscape.com Exp $
- */
- #include "cmslocal.h"
- #include "cert.h"
- #include "key.h"
- #include "secasn1.h"
- #include "secitem.h"
- #include "secoid.h"
- #include "pk11func.h"
- #include "secerr.h"
- /*
- * NSS_CMSArray_SortByDER - sort array of objects by objects' DER encoding
- *
- * make sure that the order of the objects guarantees valid DER (which must be
- * in lexigraphically ascending order for a SET OF); if reordering is necessary it
- * will be done in place (in objs).
- */
- SECStatus
- NSS_CMSArray_SortByDER(void **objs, const SEC_ASN1Template *objtemplate, void **objs2)
- {
- PRArenaPool *poolp;
- int num_objs;
- SECItem **enc_objs;
- SECStatus rv = SECFailure;
- int i;
- if (objs == NULL) /* already sorted */
- return SECSuccess;
- num_objs = NSS_CMSArray_Count((void **)objs);
- if (num_objs == 0 || num_objs == 1) /* already sorted. */
- return SECSuccess;
- poolp = PORT_NewArena (1024); /* arena for temporaries */
- if (poolp == NULL)
- return SECFailure; /* no memory; nothing we can do... */
- /*
- * Allocate arrays to hold the individual encodings which we will use
- * for comparisons and the reordered attributes as they are sorted.
- */
- enc_objs = (SECItem **)PORT_ArenaZAlloc(poolp, (num_objs + 1) * sizeof(SECItem *));
- if (enc_objs == NULL)
- goto loser;
- /* DER encode each individual object. */
- for (i = 0; i < num_objs; i++) {
- enc_objs[i] = SEC_ASN1EncodeItem(poolp, NULL, objs[i], objtemplate);
- if (enc_objs[i] == NULL)
- goto loser;
- }
- enc_objs[num_objs] = NULL;
- /* now compare and sort objs by the order of enc_objs */
- NSS_CMSArray_Sort((void **)enc_objs, NSS_CMSUtil_DERCompare, objs, objs2);
- rv = SECSuccess;
- loser:
- PORT_FreeArena (poolp, PR_FALSE);
- return rv;
- }
- /*
- * NSS_CMSUtil_DERCompare - for use with NSS_CMSArray_Sort to
- * sort arrays of SECItems containing DER
- */
- int
- NSS_CMSUtil_DERCompare(void *a, void *b)
- {
- SECItem *der1 = (SECItem *)a;
- SECItem *der2 = (SECItem *)b;
- int j;
- /*
- * Find the lowest (lexigraphically) encoding. One that is
- * shorter than all the rest is known to be "less" because each
- * attribute is of the same type (a SEQUENCE) and so thus the
- * first octet of each is the same, and the second octet is
- * the length (or the length of the length with the high bit
- * set, followed by the length, which also works out to always
- * order the shorter first). Two (or more) that have the
- * same length need to be compared byte by byte until a mismatch
- * is found.
- */
- if (der1->len != der2->len)
- return (der1->len < der2->len) ? -1 : 1;
- for (j = 0; j < der1->len; j++) {
- if (der1->data[j] == der2->data[j])
- continue;
- return (der1->data[j] < der2->data[j]) ? -1 : 1;
- }
- return 0;
- }
- /*
- * NSS_CMSAlgArray_GetIndexByAlgID - find a specific algorithm in an array of
- * algorithms.
- *
- * algorithmArray - array of algorithm IDs
- * algid - algorithmid of algorithm to pick
- *
- * Returns:
- * An integer containing the index of the algorithm in the array or -1 if
- * algorithm was not found.
- */
- int
- NSS_CMSAlgArray_GetIndexByAlgID(SECAlgorithmID **algorithmArray, SECAlgorithmID *algid)
- {
- int i;
- if (algorithmArray == NULL || algorithmArray[0] == NULL)
- return -1;
- for (i = 0; algorithmArray[i] != NULL; i++) {
- if (SECOID_CompareAlgorithmID(algorithmArray[i], algid) == SECEqual)
- break; /* bingo */
- }
- if (algorithmArray[i] == NULL)
- return -1; /* not found */
- return i;
- }
- /*
- * NSS_CMSAlgArray_GetIndexByAlgTag - find a specific algorithm in an array of
- * algorithms.
- *
- * algorithmArray - array of algorithm IDs
- * algtag - algorithm tag of algorithm to pick
- *
- * Returns:
- * An integer containing the index of the algorithm in the array or -1 if
- * algorithm was not found.
- */
- int
- NSS_CMSAlgArray_GetIndexByAlgTag(SECAlgorithmID **algorithmArray, SECOidTag algtag)
- {
- SECOidData *algid;
- int i;
- if (algorithmArray == NULL || algorithmArray[0] == NULL)
- return -1;
- for (i = 0; algorithmArray[i] != NULL; i++) {
- algid = SECOID_FindOID(&(algorithmArray[i]->algorithm));
- if (algid->offset == algtag)
- break; /* bingo */
- }
- if (algorithmArray[i] == NULL)
- return -1; /* not found */
- return i;
- }
- SECHashObject *
- NSS_CMSUtil_GetHashObjByAlgID(SECAlgorithmID *algid)
- {
- SECOidData *oiddata;
- SECHashObject *digobj;
- /* here are the algorithms we know */
- oiddata = SECOID_FindOID(&(algid->algorithm));
- if (oiddata == NULL) {
- digobj = NULL;
- } else {
- switch (oiddata->offset) {
- case SEC_OID_MD2:
- digobj = &SECHashObjects[HASH_AlgMD2];
- break;
- case SEC_OID_MD5:
- digobj = &SECHashObjects[HASH_AlgMD5];
- break;
- case SEC_OID_SHA1:
- digobj = &SECHashObjects[HASH_AlgSHA1];
- break;
- default:
- digobj = NULL;
- break;
- }
- }
- return digobj;
- }
- /*
- * XXX I would *really* like to not have to do this, but the current
- * signing interface gives me little choice.
- */
- SECOidTag
- NSS_CMSUtil_MakeSignatureAlgorithm(SECOidTag hashalg, SECOidTag encalg)
- {
- switch (encalg) {
- case SEC_OID_PKCS1_RSA_ENCRYPTION:
- switch (hashalg) {
- case SEC_OID_MD2:
- return SEC_OID_PKCS1_MD2_WITH_RSA_ENCRYPTION;
- case SEC_OID_MD5:
- return SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION;
- case SEC_OID_SHA1:
- return SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION;
- default:
- return SEC_OID_UNKNOWN;
- }
- case SEC_OID_ANSIX9_DSA_SIGNATURE:
- case SEC_OID_MISSI_KEA_DSS:
- case SEC_OID_MISSI_DSS:
- switch (hashalg) {
- case SEC_OID_SHA1:
- return SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST;
- default:
- return SEC_OID_UNKNOWN;
- }
- default:
- break;
- }
- return encalg; /* maybe it is already the right algid */
- }
- const SEC_ASN1Template *
- NSS_CMSUtil_GetTemplateByTypeTag(SECOidTag type)
- {
- const SEC_ASN1Template *template;
- extern const SEC_ASN1Template NSSCMSSignedDataTemplate[];
- extern const SEC_ASN1Template NSSCMSEnvelopedDataTemplate[];
- extern const SEC_ASN1Template NSSCMSEncryptedDataTemplate[];
- extern const SEC_ASN1Template NSSCMSDigestedDataTemplate[];
- switch (type) {
- case SEC_OID_PKCS7_SIGNED_DATA:
- template = NSSCMSSignedDataTemplate;
- break;
- case SEC_OID_PKCS7_ENVELOPED_DATA:
- template = NSSCMSEnvelopedDataTemplate;
- break;
- case SEC_OID_PKCS7_ENCRYPTED_DATA:
- template = NSSCMSEncryptedDataTemplate;
- break;
- case SEC_OID_PKCS7_DIGESTED_DATA:
- template = NSSCMSDigestedDataTemplate;
- break;
- default:
- case SEC_OID_PKCS7_DATA:
- template = NULL;
- break;
- }
- return template;
- }
- size_t
- NSS_CMSUtil_GetSizeByTypeTag(SECOidTag type)
- {
- size_t size;
- switch (type) {
- case SEC_OID_PKCS7_SIGNED_DATA:
- size = sizeof(NSSCMSSignedData);
- break;
- case SEC_OID_PKCS7_ENVELOPED_DATA:
- size = sizeof(NSSCMSEnvelopedData);
- break;
- case SEC_OID_PKCS7_ENCRYPTED_DATA:
- size = sizeof(NSSCMSEncryptedData);
- break;
- case SEC_OID_PKCS7_DIGESTED_DATA:
- size = sizeof(NSSCMSDigestedData);
- break;
- default:
- case SEC_OID_PKCS7_DATA:
- size = 0;
- break;
- }
- return size;
- }
- NSSCMSContentInfo *
- NSS_CMSContent_GetContentInfo(void *msg, SECOidTag type)
- {
- NSSCMSContent c;
- NSSCMSContentInfo *cinfo;
- PORT_Assert(msg != NULL);
- c.pointer = msg;
- switch (type) {
- case SEC_OID_PKCS7_SIGNED_DATA:
- cinfo = &(c.signedData->contentInfo);
- break;
- case SEC_OID_PKCS7_ENVELOPED_DATA:
- cinfo = &(c.envelopedData->contentInfo);
- break;
- case SEC_OID_PKCS7_ENCRYPTED_DATA:
- cinfo = &(c.encryptedData->contentInfo);
- break;
- case SEC_OID_PKCS7_DIGESTED_DATA:
- cinfo = &(c.digestedData->contentInfo);
- break;
- default:
- cinfo = NULL;
- }
- return cinfo;
- }
- const char *
- NSS_CMSUtil_VerificationStatusToString(NSSCMSVerificationStatus vs)
- {
- switch (vs) {
- case NSSCMSVS_Unverified: return "Unverified";
- case NSSCMSVS_GoodSignature: return "GoodSignature";
- case NSSCMSVS_BadSignature: return "BadSignature";
- case NSSCMSVS_DigestMismatch: return "DigestMismatch";
- case NSSCMSVS_SigningCertNotFound: return "SigningCertNotFound";
- case NSSCMSVS_SigningCertNotTrusted: return "SigningCertNotTrusted";
- case NSSCMSVS_SignatureAlgorithmUnknown: return "SignatureAlgorithmUnknown";
- case NSSCMSVS_SignatureAlgorithmUnsupported: return "SignatureAlgorithmUnsupported";
- case NSSCMSVS_MalformedSignature: return "MalformedSignature";
- case NSSCMSVS_ProcessingError: return "ProcessingError";
- default: return "Unknown";
- }
- }
- SECStatus
- NSS_CMSDEREncode(NSSCMSMessage *cmsg, SECItem *input, SECItem *derOut,
- PLArenaPool *arena)
- {
- NSSCMSEncoderContext *ecx;
- SECStatus rv = SECSuccess;
- if (!cmsg || !derOut || !arena) {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
- ecx = NSS_CMSEncoder_Start(cmsg, 0, 0, derOut, arena, 0, 0, 0, 0, 0, 0);
- if (!ecx) {
- PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
- return SECFailure;
- }
- if (input) {
- rv = NSS_CMSEncoder_Update(ecx, input->data, input->len);
- if (rv) {
- PORT_SetError(SEC_ERROR_BAD_DATA);
- }
- }
- rv |= NSS_CMSEncoder_Finish(ecx);
- if (rv) {
- PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
- }
- return rv;
- }