NS_IMETHODIMP nsCMSMessage::GetSignerCommonName(char ** aName)
{
nsNSSShutDownPreventionLock locker;
if (isAlreadyShutDown())
return NS_ERROR_NOT_AVAILABLE;
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::GetSignerCommonName\n"));
NS_ENSURE_ARG(aName);
NSSCMSSignerInfo *si = GetTopLevelSignerInfo();
if (!si)
return NS_ERROR_FAILURE;
*aName = NSS_CMSSignerInfo_GetSignerCommonName(si);
return NS_OK;
}
static CamelCipherValidity *
sm_verify_cmsg(CamelCipherContext *context, NSSCMSMessage *cmsg, CamelStream *extstream, CamelException *ex)
{
struct _CamelSMIMEContextPrivate *p = ((CamelSMIMEContext *)context)->priv;
NSSCMSSignedData *sigd = NULL;
NSSCMSEnvelopedData *envd;
NSSCMSEncryptedData *encd;
SECAlgorithmID **digestalgs;
NSSCMSDigestContext *digcx;
int count, i, nsigners, j;
SECItem **digests;
PLArenaPool *poolp = NULL;
CamelStreamMem *mem;
NSSCMSVerificationStatus status;
CamelCipherValidity *valid;
GString *description;
description = g_string_new("");
valid = camel_cipher_validity_new();
camel_cipher_validity_set_valid(valid, TRUE);
status = NSSCMSVS_Unverified;
/* NB: this probably needs to go into a decoding routine that can be used for processing
enveloped data too */
count = NSS_CMSMessage_ContentLevelCount(cmsg);
for (i = 0; i < count; i++) {
NSSCMSContentInfo *cinfo = NSS_CMSMessage_ContentLevel(cmsg, i);
SECOidTag typetag = NSS_CMSContentInfo_GetContentTypeTag(cinfo);
switch (typetag) {
case SEC_OID_PKCS7_SIGNED_DATA:
sigd = (NSSCMSSignedData *)NSS_CMSContentInfo_GetContent(cinfo);
if (sigd == NULL) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, _("No signed data in signature"));
goto fail;
}
/* need to build digests of the content */
if (!NSS_CMSSignedData_HasDigests(sigd)) {
if (extstream == NULL) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, _("Digests missing from enveloped data"));
goto fail;
}
if ((poolp = PORT_NewArena(1024)) == NULL) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, g_strerror (ENOMEM));
goto fail;
}
digestalgs = NSS_CMSSignedData_GetDigestAlgs(sigd);
digcx = NSS_CMSDigestContext_StartMultiple(digestalgs);
if (digcx == NULL) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, _("Cannot calculate digests"));
goto fail;
}
mem = (CamelStreamMem *)camel_stream_mem_new();
camel_stream_write_to_stream(extstream, (CamelStream *)mem);
NSS_CMSDigestContext_Update(digcx, mem->buffer->data, mem->buffer->len);
camel_object_unref(mem);
if (NSS_CMSDigestContext_FinishMultiple(digcx, poolp, &digests) != SECSuccess) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, _("Cannot calculate digests"));
goto fail;
}
if (NSS_CMSSignedData_SetDigests(sigd, digestalgs, digests) != SECSuccess) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, _("Cannot set message digests"));
goto fail;
}
PORT_FreeArena(poolp, PR_FALSE);
poolp = NULL;
}
/* import all certificates present */
if (NSS_CMSSignedData_ImportCerts(sigd, p->certdb, certUsageEmailSigner, PR_TRUE) != SECSuccess) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, _("Certificate import failed"));
goto fail;
}
if (NSS_CMSSignedData_ImportCerts(sigd, p->certdb, certUsageEmailRecipient, PR_TRUE) != SECSuccess) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, _("Certificate import failed"));
goto fail;
}
/* check for certs-only message */
nsigners = NSS_CMSSignedData_SignerInfoCount(sigd);
if (nsigners == 0) {
/* already imported certs above, not sure what usage we should use here or if this isn't handled above */
if (NSS_CMSSignedData_VerifyCertsOnly(sigd, p->certdb, certUsageEmailSigner) != SECSuccess) {
g_string_printf(description, _("Certificate is the only message, cannot verify certificates"));
} else {
status = NSSCMSVS_GoodSignature;
g_string_printf(description, _("Certificate is the only message, certificates imported and verified"));
}
} else {
if (!NSS_CMSSignedData_HasDigests(sigd)) {
camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM, _("Cannot find signature digests"));
goto fail;
}
for (j = 0; j < nsigners; j++) {
NSSCMSSignerInfo *si;
char *cn, *em;
si = NSS_CMSSignedData_GetSignerInfo(sigd, j);
NSS_CMSSignedData_VerifySignerInfo(sigd, j, p->certdb, certUsageEmailSigner);
status = NSS_CMSSignerInfo_GetVerificationStatus(si);
cn = NSS_CMSSignerInfo_GetSignerCommonName(si);
em = NSS_CMSSignerInfo_GetSignerEmailAddress(si);
g_string_append_printf(description, _("Signer: %s <%s>: %s\n"),
cn?cn:"<unknown>", em?em:"<unknown>",
sm_status_description(status));
camel_cipher_validity_add_certinfo(valid, CAMEL_CIPHER_VALIDITY_SIGN, cn, em);
if (cn)
PORT_Free(cn);
if (em)
PORT_Free(em);
if (status != NSSCMSVS_GoodSignature)
camel_cipher_validity_set_valid(valid, FALSE);
}
}
break;
case SEC_OID_PKCS7_ENVELOPED_DATA:
envd = (NSSCMSEnvelopedData *)NSS_CMSContentInfo_GetContent(cinfo);
break;
case SEC_OID_PKCS7_ENCRYPTED_DATA:
encd = (NSSCMSEncryptedData *)NSS_CMSContentInfo_GetContent(cinfo);
break;
case SEC_OID_PKCS7_DATA:
break;
default:
break;
}
}
camel_cipher_validity_set_valid(valid, status == NSSCMSVS_GoodSignature);
camel_cipher_validity_set_description(valid, description->str);
g_string_free(description, TRUE);
return valid;
fail:
camel_cipher_validity_free(valid);
g_string_free(description, TRUE);
return NULL;
}
