/*
* NSS_CMSContentInfo_Destroy - destroy a CMS contentInfo and all of its sub-pieces.
*/
void
NSS_CMSContentInfo_Destroy(NSSCMSContentInfo *cinfo)
{
SECOidTag kind;
if (cinfo == NULL) {
return;
}
kind = NSS_CMSContentInfo_GetContentTypeTag(cinfo);
switch (kind) {
case SEC_OID_PKCS7_ENVELOPED_DATA:
NSS_CMSEnvelopedData_Destroy(cinfo->content.envelopedData);
break;
case SEC_OID_PKCS7_SIGNED_DATA:
NSS_CMSSignedData_Destroy(cinfo->content.signedData);
break;
case SEC_OID_PKCS7_ENCRYPTED_DATA:
NSS_CMSEncryptedData_Destroy(cinfo->content.encryptedData);
break;
case SEC_OID_PKCS7_DIGESTED_DATA:
NSS_CMSDigestedData_Destroy(cinfo->content.digestedData);
break;
default:
NSS_CMSGenericWrapperData_Destroy(kind, cinfo->content.genericData);
/* XXX Anything else that needs to be "manually" freed/destroyed? */
break;
}
if (cinfo->privateInfo) {
nss_cmsContentInfo_private_destroy(cinfo->privateInfo);
cinfo->privateInfo = NULL;
}
if (cinfo->bulkkey) {
PK11_FreeSymKey(cinfo->bulkkey);
}
}
UtlBoolean SmimeBody::nssSmimeEncrypt(int numResipientCerts,
const char* derPublicKeyCerts[],
int derPublicKeyCertLengths[],
const char* dataToEncrypt,
int dataToEncryptLength,
UtlBoolean encryptedDataInBase64Format,
UtlString& encryptedData)
{
UtlBoolean encryptionSucceeded = FALSE;
encryptedData.remove(0);
#ifdef ENABLE_NSS_SMIME
// nickname can be NULL as we are not putting this in a database
char *nickname = NULL;
// copyDER = true so we copy the DER format cert passed in so memory
// is internally alloc'd and freed
PRBool copyDER = true;
// Create an envelope or container for the encrypted data
SECOidTag algorithm = SEC_OID_DES_EDE3_CBC; // or SEC_OID_AES_128_CBC
// Should be able to get the key size from the cert somehow
int keysize = 1024;
NSSCMSMessage* cmsMessage = NSS_CMSMessage_Create(NULL);
NSSCMSEnvelopedData* myEnvelope =
NSS_CMSEnvelopedData_Create(cmsMessage, algorithm, keysize);
// Do the following for each recipient if there is more than one.
// For each recipient:
for(int certIndex = 0; certIndex < numResipientCerts; certIndex++)
{
// Convert the DER to a NSS CERT
SECItem derFormatCertItem;
SECItem* derFormatCertItemPtr = &derFormatCertItem;
derFormatCertItem.data = (unsigned char*) derPublicKeyCerts[certIndex];
derFormatCertItem.len = derPublicKeyCertLengths[certIndex];
CERTCertificate* myCertFromDer = NULL;
myCertFromDer = __CERT_DecodeDERCertificate(&derFormatCertItem,
copyDER,
nickname);
// Add just the recipient Subject key Id, if it exists to the envelope
// This is the minimal information needed to identify which recipient
// the the symetric/session key is encrypted for
NSSCMSRecipientInfo* recipientInfo = NULL;
// Add the full set of recipient information including
// the Cert. issuer location and org. info.
recipientInfo =
NSS_CMSRecipientInfo_Create(cmsMessage, myCertFromDer);
if(recipientInfo)
{
if(NSS_CMSEnvelopedData_AddRecipient(myEnvelope , recipientInfo) !=
SECSuccess)
{
NSS_CMSEnvelopedData_Destroy(myEnvelope);
myEnvelope = NULL;
NSS_CMSRecipientInfo_Destroy(recipientInfo);
}
}
// No recipientInfo
else
{
NSS_CMSEnvelopedData_Destroy(myEnvelope);
myEnvelope = NULL;
}
} //end for each recipient
// Get the content out of the envelop
NSSCMSContentInfo* envelopContentInfo =
NSS_CMSEnvelopedData_GetContentInfo(myEnvelope);
//TODO: why are we copying or setting the content pointer from the envelope into the msg????????
if (NSS_CMSContentInfo_SetContent_Data(cmsMessage,
envelopContentInfo,
NULL,
PR_FALSE) !=
SECSuccess)
{
// release cmsg and other stuff
NSS_CMSEnvelopedData_Destroy(myEnvelope);
myEnvelope = NULL;
}
//TODO: why are we copying or setting the content pointer from the message and
// putting it back into the msg????????
NSSCMSContentInfo* messageContentInfo =
NSS_CMSMessage_GetContentInfo(cmsMessage);
if(NSS_CMSContentInfo_SetContent_EnvelopedData(cmsMessage,
messageContentInfo,
myEnvelope) !=
SECSuccess)
{
// release cmsg and other stuff
NSS_CMSEnvelopedData_Destroy(myEnvelope);
myEnvelope = NULL;
}
if(cmsMessage)
{
// Create an encoder and context to do the encryption.
// The encodedItem will stort the encoded result
//SECItem encodedItem;
//encodedItem.data = NULL;
//encodedItem.len = 0;
//SECITEM_AllocItem(NULL, &encodedItem, 0);
printf("start encoder\n");
NSSCMSEncoderContext* encoderContext =
NSS_CMSEncoder_Start(cmsMessage, nssOutToUtlString, &encryptedData, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL);
// Add encrypted content
printf("update encoder\n");
NSS_CMSEncoder_Update(encoderContext, dataToEncrypt, dataToEncryptLength);
// Finished encrypting
printf("finish encoder\n");
NSS_CMSEncoder_Finish(encoderContext);
myEnvelope = NULL;
if(encryptedData.length() > 0)
{
encryptionSucceeded = TRUE;
}
// Clean up the message memory, the envelop gets cleaned up
// with the message
NSS_CMSMessage_Destroy(cmsMessage);
cmsMessage = NULL;
}
#else
Os::Logger::instance().log(FAC_SIP, PRI_ERR, "SmimeBody::nssSmimeEncrypt invoked with ENABLE_NSS_SMIME not defined");
#endif
return(encryptionSucceeded);
}
