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gecko-dev
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gecko-dev/security/nss/lib/smime/cmsutil.c

368 строки
10 KiB
C
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* CMS miscellaneous utility functions.
*/
#include "cmslocal.h"
#include "cert.h"
#include "keyhi.h"
#include "secasn1.h"
#include "secitem.h"
#include "secoid.h"
#include "pk11func.h"
#include "secerr.h"
#include "sechash.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)
{
PLArenaPool *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;
unsigned 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 = -1;
if (algorithmArray == NULL || algorithmArray[0] == NULL)
return i;
#ifdef ORDER_N_SQUARED
for (i = 0; algorithmArray[i] != NULL; i++) {
algid = SECOID_FindOID(&(algorithmArray[i]->algorithm));
if (algid->offset == algtag)
break; /* bingo */
}
#else
algid = SECOID_FindOIDByTag(algtag);
if (!algid)
return i;
for (i = 0; algorithmArray[i] != NULL; i++) {
if (SECITEM_ItemsAreEqual(&algorithmArray[i]->algorithm, &algid->oid))
break; /* bingo */
}
#endif
if (algorithmArray[i] == NULL)
return -1; /* not found */
return i;
}
/*
* Map a sign algorithm to a digest algorithm.
* This is used to handle incorrectly formatted packages sent to us
* from Windows 2003.
*/
SECOidTag
NSS_CMSUtil_MapSignAlgs(SECOidTag signAlg)
{
switch (signAlg) {
case SEC_OID_PKCS1_MD2_WITH_RSA_ENCRYPTION:
return SEC_OID_MD2;
break;
case SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION:
return SEC_OID_MD5;
break;
case SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION:
case SEC_OID_ANSIX962_ECDSA_SHA1_SIGNATURE:
case SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST:
return SEC_OID_SHA1;
break;
case SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION:
case SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE:
return SEC_OID_SHA256;
break;
case SEC_OID_PKCS1_SHA384_WITH_RSA_ENCRYPTION:
case SEC_OID_ANSIX962_ECDSA_SHA384_SIGNATURE:
return SEC_OID_SHA384;
break;
case SEC_OID_PKCS1_SHA512_WITH_RSA_ENCRYPTION:
case SEC_OID_ANSIX962_ECDSA_SHA512_SIGNATURE:
return SEC_OID_SHA512;
break;
default:
break;
}
/* not one of the algtags incorrectly sent to us*/
return signAlg;
}
const SECHashObject *
NSS_CMSUtil_GetHashObjByAlgID(SECAlgorithmID *algid)
{
SECOidTag oidTag = SECOID_FindOIDTag(&(algid->algorithm));
const SECHashObject *digobj = HASH_GetHashObjectByOidTag(oidTag);
return digobj;
}
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:
template = NSS_CMSType_GetTemplate(type);
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:
size = NSS_CMSType_GetContentSize(type);
break;
}
return size;
}
NSSCMSContentInfo *
NSS_CMSContent_GetContentInfo(void *msg, SECOidTag type)
{
NSSCMSContent c;
NSSCMSContentInfo *cinfo = NULL;
if (!msg)
return cinfo;
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;
if (NSS_CMSType_IsWrapper(type)) {
cinfo = &(c.genericData->contentInfo);
}
}
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, (const char *)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;
}
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