/* validates the safe within the authenticated safe item.
* in order to be valid:
* 1. the privacy salt must be present
* 2. the encryption algorithm must be supported (including
* export policy)
* PR_FALSE indicates an error, PR_TRUE indicates a valid safe
*/
static PRBool
sec_pkcs12_validate_encrypted_safe(SEC_PKCS12AuthenticatedSafe *asafe)
{
PRBool valid = PR_FALSE;
SECAlgorithmID *algid;
if(asafe == NULL) {
return PR_FALSE;
}
/* if mode is password privacy, then privacySalt is assumed
* to be non-zero.
*/
if(asafe->privacySalt.len != 0) {
valid = PR_TRUE;
asafe->privacySalt.len /= 8;
} else {
PORT_SetError(SEC_ERROR_PKCS12_CORRUPT_PFX_STRUCTURE);
return PR_FALSE;
}
/* until spec changes, content will have between 2 and 8 bytes depending
* upon the algorithm used if certs are unencrypted...
* also want to support case where content is empty -- which we produce
*/
if(SEC_PKCS7IsContentEmpty(asafe->safe, 8) == PR_TRUE) {
asafe->emptySafe = PR_TRUE;
return PR_TRUE;
}
asafe->emptySafe = PR_FALSE;
/* make sure that a pbe algorithm is being used */
algid = SEC_PKCS7GetEncryptionAlgorithm(asafe->safe);
if(algid != NULL) {
if(SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
valid = SEC_PKCS12DecryptionAllowed(algid);
if(valid == PR_FALSE) {
PORT_SetError(SEC_ERROR_BAD_EXPORT_ALGORITHM);
}
} else {
PORT_SetError(SEC_ERROR_PKCS12_UNSUPPORTED_PBE_ALGORITHM);
valid = PR_FALSE;
}
} else {
valid = PR_FALSE;
PORT_SetError(SEC_ERROR_PKCS12_UNSUPPORTED_PBE_ALGORITHM);
}
return valid;
}
/*
* SecCmsEncryptedDataDecodeBeforeData - find bulk key & set up decryption
*/
OSStatus
SecCmsEncryptedDataDecodeBeforeData(SecCmsEncryptedDataRef encd)
{
SecSymmetricKeyRef bulkkey = NULL;
SecCmsContentInfoRef cinfo;
SECAlgorithmID *bulkalg;
OSStatus rv = SECFailure;
cinfo = &(encd->contentInfo);
bulkalg = SecCmsContentInfoGetContentEncAlg(cinfo);
if (encd->cmsg->decrypt_key_cb == NULL) /* no callback? no key../ */
goto loser;
bulkkey = (*encd->cmsg->decrypt_key_cb)(encd->cmsg->decrypt_key_cb_arg, bulkalg);
if (bulkkey == NULL)
/* no success finding a bulk key */
goto loser;
SecCmsContentInfoSetBulkKey(cinfo, bulkkey);
cinfo->ciphcx = SecCmsCipherContextStartDecrypt(bulkkey, bulkalg);
if (cinfo->ciphcx == NULL)
goto loser; /* error has been set by SecCmsCipherContextStartDecrypt */
#if 1
// @@@ Not done yet
#else
/*
* HACK ALERT!!
* For PKCS5 Encryption Algorithms, the bulkkey is actually a different
* structure. Therefore, we need to set the bulkkey to the actual key
* prior to freeing it.
*/
if (SEC_PKCS5IsAlgorithmPBEAlg(bulkalg)) {
SEC_PKCS5KeyAndPassword *keyPwd = (SEC_PKCS5KeyAndPassword *)bulkkey;
bulkkey = keyPwd->key;
}
#endif
/* we are done with (this) bulkkey now. */
CFRelease(bulkkey);
rv = SECSuccess;
loser:
return rv;
}
/*
* NSS_CMSCipherContext_StartDecrypt - create a cipher context to do decryption
* based on the given bulk encryption key and algorithm identifier (which
* may include an iv).
*
* XXX Once both are working, it might be nice to combine this and the
* function below (for starting up encryption) into one routine, and just
* have two simple cover functions which call it.
*/
NSSCMSCipherContext *
NSS_CMSCipherContext_StartDecrypt(PK11SymKey *key, SECAlgorithmID *algid)
{
NSSCMSCipherContext *cc;
void *ciphercx;
CK_MECHANISM_TYPE cryptoMechType;
PK11SlotInfo *slot;
SECOidTag algtag;
SECItem *param = NULL;
algtag = SECOID_GetAlgorithmTag(algid);
/* set param and mechanism */
if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
SECItem *pwitem;
pwitem = PK11_GetSymKeyUserData(key);
if (!pwitem)
return NULL;
cryptoMechType = PK11_GetPBECryptoMechanism(algid, ¶m, pwitem);
if (cryptoMechType == CKM_INVALID_MECHANISM) {
SECITEM_FreeItem(param,PR_TRUE);
return NULL;
}
} else {
cryptoMechType = PK11_AlgtagToMechanism(algtag);
if ((param = PK11_ParamFromAlgid(algid)) == NULL)
return NULL;
}
cc = (NSSCMSCipherContext *)PORT_ZAlloc(sizeof(NSSCMSCipherContext));
if (cc == NULL) {
SECITEM_FreeItem(param,PR_TRUE);
return NULL;
}
/* figure out pad and block sizes */
cc->pad_size = PK11_GetBlockSize(cryptoMechType, param);
slot = PK11_GetSlotFromKey(key);
cc->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : cc->pad_size;
PK11_FreeSlot(slot);
/* create PK11 cipher context */
ciphercx = PK11_CreateContextBySymKey(cryptoMechType, CKA_DECRYPT,
key, param);
SECITEM_FreeItem(param, PR_TRUE);
if (ciphercx == NULL) {
PORT_Free (cc);
return NULL;
}
cc->cx = ciphercx;
cc->doit = (nss_cms_cipher_function) PK11_CipherOp;
cc->destroy = (nss_cms_cipher_destroy) PK11_DestroyContext;
cc->encrypt = PR_FALSE;
cc->pending_count = 0;
return cc;
}
/*
* NSS_CMSCipherContext_StartEncrypt - create a cipher object to do encryption,
* based on the given bulk encryption key and algorithm tag. Fill in the
* algorithm identifier (which may include an iv) appropriately.
*
* XXX Once both are working, it might be nice to combine this and the
* function above (for starting up decryption) into one routine, and just
* have two simple cover functions which call it.
*/
NSSCMSCipherContext *
NSS_CMSCipherContext_StartEncrypt(PLArenaPool *poolp, PK11SymKey *key, SECAlgorithmID *algid)
{
NSSCMSCipherContext *cc;
void *ciphercx;
SECStatus rv;
CK_MECHANISM_TYPE cryptoMechType;
PK11SlotInfo *slot;
SECItem *param = NULL;
PRBool needToEncodeAlgid = PR_FALSE;
SECOidTag algtag = SECOID_GetAlgorithmTag(algid);
/* set param and mechanism */
if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
SECItem *pwitem;
pwitem = PK11_GetSymKeyUserData(key);
if (!pwitem)
return NULL;
cryptoMechType = PK11_GetPBECryptoMechanism(algid, ¶m, pwitem);
if (cryptoMechType == CKM_INVALID_MECHANISM) {
SECITEM_FreeItem(param,PR_TRUE);
return NULL;
}
} else {
cryptoMechType = PK11_AlgtagToMechanism(algtag);
if ((param = PK11_GenerateNewParam(cryptoMechType, key)) == NULL)
return NULL;
needToEncodeAlgid = PR_TRUE;
}
cc = (NSSCMSCipherContext *)PORT_ZAlloc(sizeof(NSSCMSCipherContext));
if (cc == NULL) {
goto loser;
}
/* now find pad and block sizes for our mechanism */
cc->pad_size = PK11_GetBlockSize(cryptoMechType, param);
slot = PK11_GetSlotFromKey(key);
cc->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : cc->pad_size;
PK11_FreeSlot(slot);
/* and here we go, creating a PK11 cipher context */
ciphercx = PK11_CreateContextBySymKey(cryptoMechType, CKA_ENCRYPT,
key, param);
if (ciphercx == NULL) {
PORT_Free(cc);
cc = NULL;
goto loser;
}
/*
* These are placed after the CreateContextBySymKey() because some
* mechanisms have to generate their IVs from their card (i.e. FORTEZZA).
* Don't move it from here.
* XXX is that right? the purpose of this is to get the correct algid
* containing the IVs etc. for encoding. this means we need to set this up
* BEFORE encoding the algid in the contentInfo, right?
*/
if (needToEncodeAlgid) {
rv = PK11_ParamToAlgid(algtag, param, poolp, algid);
if(rv != SECSuccess) {
PORT_Free(cc);
cc = NULL;
goto loser;
}
}
cc->cx = ciphercx;
cc->doit = (nss_cms_cipher_function)PK11_CipherOp;
cc->destroy = (nss_cms_cipher_destroy)PK11_DestroyContext;
cc->encrypt = PR_TRUE;
cc->pending_count = 0;
loser:
SECITEM_FreeItem(param, PR_TRUE);
return cc;
}
/*
* Create a cipher object to do decryption, based on the given bulk
* encryption key and algorithm identifier (which may include an iv).
*
* XXX This interface, or one similar, would be really nice available
* in general... I tried to keep the pkcs7-specific stuff (mostly
* having to do with padding) out of here.
*
* XXX Once both are working, it might be nice to combine this and the
* function below (for starting up encryption) into one routine, and just
* have two simple cover functions which call it.
*/
sec_PKCS7CipherObject *
sec_PKCS7CreateDecryptObject (PK11SymKey *key, SECAlgorithmID *algid)
{
sec_PKCS7CipherObject *result;
SECOidTag algtag;
void *ciphercx;
CK_MECHANISM_TYPE cryptoMechType;
PK11SlotInfo *slot;
SECItem *param = NULL;
result = (struct sec_pkcs7_cipher_object*)
PORT_ZAlloc (sizeof(struct sec_pkcs7_cipher_object));
if (result == NULL)
return NULL;
ciphercx = NULL;
algtag = SECOID_GetAlgorithmTag (algid);
if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
SECItem *pwitem;
pwitem = (SECItem *)PK11_GetSymKeyUserData(key);
if (!pwitem) {
PORT_Free(result);
return NULL;
}
cryptoMechType = PK11_GetPBECryptoMechanism(algid, ¶m, pwitem);
if (cryptoMechType == CKM_INVALID_MECHANISM) {
PORT_Free(result);
SECITEM_FreeItem(param,PR_TRUE);
return NULL;
}
} else {
cryptoMechType = PK11_AlgtagToMechanism(algtag);
param = PK11_ParamFromAlgid(algid);
if (param == NULL) {
PORT_Free(result);
return NULL;
}
}
result->pad_size = PK11_GetBlockSize(cryptoMechType, param);
slot = PK11_GetSlotFromKey(key);
result->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : result->pad_size;
PK11_FreeSlot(slot);
ciphercx = PK11_CreateContextBySymKey(cryptoMechType, CKA_DECRYPT,
key, param);
SECITEM_FreeItem(param,PR_TRUE);
if (ciphercx == NULL) {
PORT_Free (result);
return NULL;
}
result->cx = ciphercx;
result->doit = (sec_pkcs7_cipher_function) PK11_CipherOp;
result->destroy = (sec_pkcs7_cipher_destroy) PK11_DestroyContext;
result->encrypt = PR_FALSE;
result->pending_count = 0;
return result;
}
/*
* Create a cipher object to do encryption, based on the given bulk
* encryption key and algorithm tag. Fill in the algorithm identifier
* (which may include an iv) appropriately.
*
* XXX This interface, or one similar, would be really nice available
* in general... I tried to keep the pkcs7-specific stuff (mostly
* having to do with padding) out of here.
*
* XXX Once both are working, it might be nice to combine this and the
* function above (for starting up decryption) into one routine, and just
* have two simple cover functions which call it.
*/
sec_PKCS7CipherObject *
sec_PKCS7CreateEncryptObject (PRArenaPool *poolp, PK11SymKey *key,
SECOidTag algtag, SECAlgorithmID *algid)
{
sec_PKCS7CipherObject *result;
void *ciphercx;
SECStatus rv;
CK_MECHANISM_TYPE cryptoMechType;
PK11SlotInfo *slot;
SECItem *param = NULL;
PRBool needToEncodeAlgid = PR_FALSE;
result = (struct sec_pkcs7_cipher_object*)
PORT_ZAlloc (sizeof(struct sec_pkcs7_cipher_object));
if (result == NULL)
return NULL;
ciphercx = NULL;
if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
SECItem *pwitem;
pwitem = (SECItem *)PK11_GetSymKeyUserData(key);
if (!pwitem) {
PORT_Free(result);
return NULL;
}
cryptoMechType = PK11_GetPBECryptoMechanism(algid, ¶m, pwitem);
if (cryptoMechType == CKM_INVALID_MECHANISM) {
PORT_Free(result);
SECITEM_FreeItem(param,PR_TRUE);
return NULL;
}
} else {
cryptoMechType = PK11_AlgtagToMechanism(algtag);
param = PK11_GenerateNewParam(cryptoMechType, key);
if (param == NULL) {
PORT_Free(result);
return NULL;
}
needToEncodeAlgid = PR_TRUE;
}
result->pad_size = PK11_GetBlockSize(cryptoMechType,param);
slot = PK11_GetSlotFromKey(key);
result->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : result->pad_size;
PK11_FreeSlot(slot);
ciphercx = PK11_CreateContextBySymKey(cryptoMechType, CKA_ENCRYPT,
key, param);
if (ciphercx == NULL) {
PORT_Free (result);
SECITEM_FreeItem(param,PR_TRUE);
return NULL;
}
/*
* These are placed after the CreateContextBySymKey() because some
* mechanisms have to generate their IVs from their card (i.e. FORTEZZA).
* Don't move it from here.
*/
if (needToEncodeAlgid) {
rv = PK11_ParamToAlgid(algtag,param,poolp,algid);
if(rv != SECSuccess) {
PORT_Free (result);
SECITEM_FreeItem(param,PR_TRUE);
return NULL;
}
}
SECITEM_FreeItem(param,PR_TRUE);
result->cx = ciphercx;
result->doit = (sec_pkcs7_cipher_function) PK11_CipherOp;
result->destroy = (sec_pkcs7_cipher_destroy) PK11_DestroyContext;
result->encrypt = PR_TRUE;
result->pending_count = 0;
return result;
}
/*
* SecCmsCipherContextStartEncrypt - create a cipher object to do encryption,
* based on the given bulk encryption key and algorithm tag. Fill in the algorithm
* identifier (which may include an iv) appropriately.
*
* XXX Once both are working, it might be nice to combine this and the
* function above (for starting up decryption) into one routine, and just
* have two simple cover functions which call it.
*/
SecCmsCipherContext *
SecCmsCipherContextStartEncrypt(PRArenaPool *poolp, SecSymmetricKeyRef key, SECAlgorithmID *algid)
{
return SecCmsCipherContextStart(poolp, key, algid, PR_TRUE);
#if 0
SecCmsCipherContext *cc;
void *ciphercx;
CSSM_DATA *param;
OSStatus rv;
CK_MECHANISM_TYPE mechanism;
PK11SlotInfo *slot;
PRBool needToEncodeAlgid = PR_FALSE;
SECOidTag algtag = SECOID_GetAlgorithmTag(algid);
/* set param and mechanism */
if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
CK_MECHANISM pbeMech, cryptoMech;
CSSM_DATA *pbeParams;
SEC_PKCS5KeyAndPassword *keyPwd;
PORT_Memset(&pbeMech, 0, sizeof(CK_MECHANISM));
PORT_Memset(&cryptoMech, 0, sizeof(CK_MECHANISM));
/* HACK ALERT!
* in this case, key is not actually a SecSymmetricKeyRef, but a SEC_PKCS5KeyAndPassword *
*/
keyPwd = (SEC_PKCS5KeyAndPassword *)key;
key = keyPwd->key;
/* find correct PK11 mechanism and parameters to initialize pbeMech */
pbeMech.mechanism = PK11_AlgtagToMechanism(algtag);
pbeParams = PK11_ParamFromAlgid(algid);
if (!pbeParams)
return NULL;
pbeMech.pParameter = pbeParams->Data;
pbeMech.ulParameterLen = pbeParams->Length;
/* now map pbeMech to cryptoMech */
if (PK11_MapPBEMechanismToCryptoMechanism(&pbeMech, &cryptoMech, keyPwd->pwitem,
PR_FALSE) != CKR_OK) {
SECITEM_ZfreeItem(pbeParams, PR_TRUE);
return NULL;
}
SECITEM_ZfreeItem(pbeParams, PR_TRUE);
/* and use it to initialize param & mechanism */
if ((param = (CSSM_DATA *)PORT_ZAlloc(sizeof(CSSM_DATA))) == NULL)
return NULL;
param->Data = (unsigned char *)cryptoMech.pParameter;
param->Length = cryptoMech.ulParameterLen;
mechanism = cryptoMech.mechanism;
} else {
mechanism = PK11_AlgtagToMechanism(algtag);
if ((param = PK11_GenerateNewParam(mechanism, key)) == NULL)
return NULL;
needToEncodeAlgid = PR_TRUE;
}
cc = (SecCmsCipherContext *)PORT_ZAlloc(sizeof(SecCmsCipherContext));
if (cc == NULL)
return NULL;
/* now find pad and block sizes for our mechanism */
cc->pad_size = PK11_GetBlockSize(mechanism,param);
slot = PK11_GetSlotFromKey(key);
cc->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : cc->pad_size;
PK11_FreeSlot(slot);
/* and here we go, creating a PK11 cipher context */
ciphercx = PK11_CreateContextBySymKey(mechanism, CKA_ENCRYPT, key, param);
if (ciphercx == NULL) {
PORT_Free(cc);
cc = NULL;
goto loser;
}
/*
* These are placed after the CreateContextBySymKey() because some
* mechanisms have to generate their IVs from their card (i.e. FORTEZZA).
* Don't move it from here.
* XXX is that right? the purpose of this is to get the correct algid
* containing the IVs etc. for encoding. this means we need to set this up
* BEFORE encoding the algid in the contentInfo, right?
*/
if (needToEncodeAlgid) {
rv = PK11_ParamToAlgid(algtag, param, poolp, algid);
if(rv != SECSuccess) {
PORT_Free(cc);
cc = NULL;
goto loser;
}
}
cc->cx = ciphercx;
cc->doit = (nss_cms_cipher_function)PK11_CipherOp;
cc->destroy = (nss_cms_cipher_destroy)PK11_DestroyContext;
cc->encrypt = PR_TRUE;
cc->pending_count = 0;
loser:
SECITEM_FreeItem(param, PR_TRUE);
return cc;
#endif
}
/*
* SecCmsCipherContextStartDecrypt - create a cipher context to do decryption
* based on the given bulk * encryption key and algorithm identifier (which may include an iv).
*
* XXX Once both are working, it might be nice to combine this and the
* function below (for starting up encryption) into one routine, and just
* have two simple cover functions which call it.
*/
SecCmsCipherContext *
SecCmsCipherContextStartDecrypt(SecSymmetricKeyRef key, SECAlgorithmID *algid)
{
return SecCmsCipherContextStart(NULL, key, algid, PR_FALSE);
#if 0
SecCmsCipherContext *cc;
void *ciphercx;
CK_MECHANISM_TYPE mechanism;
CSSM_DATA *param;
PK11SlotInfo *slot;
SECOidTag algtag;
algtag = SECOID_GetAlgorithmTag(algid);
/* set param and mechanism */
if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
CK_MECHANISM pbeMech, cryptoMech;
CSSM_DATA *pbeParams;
SEC_PKCS5KeyAndPassword *keyPwd;
PORT_Memset(&pbeMech, 0, sizeof(CK_MECHANISM));
PORT_Memset(&cryptoMech, 0, sizeof(CK_MECHANISM));
/* HACK ALERT!
* in this case, key is not actually a SecSymmetricKeyRef, but a SEC_PKCS5KeyAndPassword *
*/
keyPwd = (SEC_PKCS5KeyAndPassword *)key;
key = keyPwd->key;
/* find correct PK11 mechanism and parameters to initialize pbeMech */
pbeMech.mechanism = PK11_AlgtagToMechanism(algtag);
pbeParams = PK11_ParamFromAlgid(algid);
if (!pbeParams)
return NULL;
pbeMech.pParameter = pbeParams->Data;
pbeMech.ulParameterLen = pbeParams->Length;
/* now map pbeMech to cryptoMech */
if (PK11_MapPBEMechanismToCryptoMechanism(&pbeMech, &cryptoMech, keyPwd->pwitem,
PR_FALSE) != CKR_OK) {
SECITEM_ZfreeItem(pbeParams, PR_TRUE);
return NULL;
}
SECITEM_ZfreeItem(pbeParams, PR_TRUE);
/* and use it to initialize param & mechanism */
if ((param = (CSSM_DATA *)PORT_ZAlloc(sizeof(CSSM_DATA))) == NULL)
return NULL;
param->Data = (unsigned char *)cryptoMech.pParameter;
param->Length = cryptoMech.ulParameterLen;
mechanism = cryptoMech.mechanism;
} else {
mechanism = PK11_AlgtagToMechanism(algtag);
if ((param = PK11_ParamFromAlgid(algid)) == NULL)
return NULL;
}
cc = (SecCmsCipherContext *)PORT_ZAlloc(sizeof(SecCmsCipherContext));
if (cc == NULL) {
SECITEM_FreeItem(param,PR_TRUE);
return NULL;
}
/* figure out pad and block sizes */
cc->pad_size = PK11_GetBlockSize(mechanism, param);
slot = PK11_GetSlotFromKey(key);
cc->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : cc->pad_size;
PK11_FreeSlot(slot);
/* create PK11 cipher context */
ciphercx = PK11_CreateContextBySymKey(mechanism, CKA_DECRYPT, key, param);
SECITEM_FreeItem(param, PR_TRUE);
if (ciphercx == NULL) {
PORT_Free (cc);
return NULL;
}
cc->cx = ciphercx;
cc->doit = (nss_cms_cipher_function) PK11_CipherOp;
cc->destroy = (nss_cms_cipher_destroy) PK11_DestroyContext;
cc->encrypt = PR_FALSE;
cc->pending_count = 0;
return cc;
#endif
}
/*
* SecCmsEnvelopedDataDecodeBeforeData - find our recipientinfo,
* derive bulk key & set up our contentinfo
*/
OSStatus
SecCmsEnvelopedDataDecodeBeforeData(SecCmsEnvelopedData *envd)
{
SecCmsRecipientInfo *ri;
SecSymmetricKeyRef bulkkey = NULL;
SECOidTag bulkalgtag;
SECAlgorithmID *bulkalg;
OSStatus rv = SECFailure;
SecCmsContentInfo *cinfo;
SecCmsRecipient **recipient_list = NULL;
SecCmsRecipient *recipient;
int rlIndex;
if (SecCmsArrayCount((void **)envd->recipientInfos) == 0) {
PORT_SetError(SEC_ERROR_BAD_DATA);
#if 0
PORT_SetErrorString("No recipient data in envelope.");
#endif
goto loser;
}
/* look if one of OUR cert's issuerSN is on the list of recipients, and if so, */
/* get the cert and private key for it right away */
recipient_list = nss_cms_recipient_list_create(envd->recipientInfos);
if (recipient_list == NULL)
goto loser;
/* what about multiple recipientInfos that match?
* especially if, for some reason, we could not produce a bulk key with the first match?!
* we could loop & feed partial recipient_list to PK11_FindCertAndKeyByRecipientList...
* maybe later... */
rlIndex = nss_cms_FindCertAndKeyByRecipientList(recipient_list, envd->cmsg->pwfn_arg);
/* if that fails, then we're not an intended recipient and cannot decrypt */
if (rlIndex < 0) {
PORT_SetError(SEC_ERROR_NOT_A_RECIPIENT);
#if 0
PORT_SetErrorString("Cannot decrypt data because proper key cannot be found.");
#endif
goto loser;
}
recipient = recipient_list[rlIndex];
if (!recipient->cert || !recipient->privkey) {
/* XXX should set an error code ?!? */
goto loser;
}
/* get a pointer to "our" recipientinfo */
ri = envd->recipientInfos[recipient->riIndex];
cinfo = &(envd->contentInfo);
bulkalgtag = SecCmsContentInfoGetContentEncAlgTag(cinfo);
bulkkey = SecCmsRecipientInfoUnwrapBulkKey(ri,recipient->subIndex,
recipient->cert,
recipient->privkey,
bulkalgtag);
if (bulkkey == NULL) {
/* no success finding a bulk key */
goto loser;
}
SecCmsContentInfoSetBulkKey(cinfo, bulkkey);
// @@@ See 3401088 for details. We need to CFRelease cinfo->bulkkey before recipient->privkey gets CFReleased. It's created with SecKeyCreate which is not safe currently. If the private key's SecKeyRef from which we extracted the CSP gets CFRelease before the builkkey does we crash. We should really fix SecKeyCreate which is a huge hack currently. To work around this we add recipient->privkey to the cinfo so it gets when cinfo is destroyed.
CFRetain(recipient->privkey);
cinfo->privkey = recipient->privkey;
bulkalg = SecCmsContentInfoGetContentEncAlg(cinfo);
cinfo->ciphcx = SecCmsCipherContextStartDecrypt(bulkkey, bulkalg);
if (cinfo->ciphcx == NULL)
goto loser; /* error has been set by SecCmsCipherContextStartDecrypt */
#if 1
// @@@ Fix me
#else
/*
* HACK ALERT!!
* For PKCS5 Encryption Algorithms, the bulkkey is actually a different
* structure. Therefore, we need to set the bulkkey to the actual key
* prior to freeing it.
*/
if (SEC_PKCS5IsAlgorithmPBEAlg(bulkalg)) {
SEC_PKCS5KeyAndPassword *keyPwd = (SEC_PKCS5KeyAndPassword *)bulkkey;
bulkkey = keyPwd->key;
}
#endif
rv = SECSuccess;
loser:
if (bulkkey)
CFRelease(bulkkey);
if (recipient_list != NULL)
nss_cms_recipient_list_destroy(recipient_list);
return rv;
}