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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/cert_database.h"
#include <cert.h>
#include <certdb.h>
#include <keyhi.h>
#include <pk11pub.h>
#include <secmod.h>
#include "base/logging.h"
#include "base/nss_util.h"
#include "base/scoped_ptr.h"
#include "net/base/net_errors.h"
#include "net/base/x509_certificate.h"
#include "net/third_party/mozilla_security_manager/nsNSSCertificateDB.h"
#include "net/third_party/mozilla_security_manager/nsNSSCertTrust.h"
#include "net/third_party/mozilla_security_manager/nsPKCS12Blob.h"
// PSM = Mozilla's Personal Security Manager.
namespace psm = mozilla_security_manager;
namespace net {
CertDatabase::CertDatabase() {
base::EnsureNSSInit();
psm::EnsurePKCS12Init();
}
int CertDatabase::CheckUserCert(X509Certificate* cert_obj) {
if (!cert_obj)
return ERR_CERT_INVALID;
if (cert_obj->HasExpired())
return ERR_CERT_DATE_INVALID;
// Check if the private key corresponding to the certificate exist
// We shouldn't accept any random client certificate sent by a CA.
// Note: The NSS source documentation wrongly suggests that this
// also imports the certificate if the private key exists. This
// doesn't seem to be the case.
CERTCertificate* cert = cert_obj->os_cert_handle();
PK11SlotInfo* slot = PK11_KeyForCertExists(cert, NULL, NULL);
if (!slot) {
LOG(ERROR) << "No corresponding private key in store";
return ERR_NO_PRIVATE_KEY_FOR_CERT;
}
PK11_FreeSlot(slot);
return OK;
}
int CertDatabase::AddUserCert(X509Certificate* cert_obj) {
CERTCertificate* cert = cert_obj->os_cert_handle();
PK11SlotInfo* slot = NULL;
std::string nickname;
// Create a nickname for this certificate.
// We use the scheme used by Firefox:
// --> <subject's common name>'s <issuer's common name> ID.
std::string username, ca_name;
char* temp_username = CERT_GetCommonName(&cert->subject);
char* temp_ca_name = CERT_GetCommonName(&cert->issuer);
if (temp_username) {
username = temp_username;
PORT_Free(temp_username);
}
if (temp_ca_name) {
ca_name = temp_ca_name;
PORT_Free(temp_ca_name);
}
nickname = username + "'s " + ca_name + " ID";
{
base::AutoNSSWriteLock lock;
slot = PK11_ImportCertForKey(cert,
const_cast<char*>(nickname.c_str()),
NULL);
}
if (!slot) {
LOG(ERROR) << "Couldn't import user certificate.";
return ERR_ADD_USER_CERT_FAILED;
}
PK11_FreeSlot(slot);
return OK;
}
void CertDatabase::ListCerts(CertificateList* certs) {
certs->clear();
CERTCertList* cert_list = PK11_ListCerts(PK11CertListUnique, NULL);
CERTCertListNode* node;
for (node = CERT_LIST_HEAD(cert_list);
!CERT_LIST_END(node, cert_list);
node = CERT_LIST_NEXT(node)) {
certs->push_back(X509Certificate::CreateFromHandle(
node->cert,
X509Certificate::SOURCE_LONE_CERT_IMPORT,
X509Certificate::OSCertHandles()));
}
CERT_DestroyCertList(cert_list);
}
int CertDatabase::ImportFromPKCS12(
const std::string& data, const string16& password) {
return psm::nsPKCS12Blob_Import(data.data(), data.size(), password);
}
int CertDatabase::ExportToPKCS12(
const CertificateList& certs,
const string16& password,
std::string* output) const {
return psm::nsPKCS12Blob_Export(output, certs, password);
}
X509Certificate* CertDatabase::FindRootInList(
const CertificateList& certificates) const {
DCHECK_GT(certificates.size(), 0U);
if (certificates.size() == 1)
return certificates[0].get();
X509Certificate* cert0 = certificates[0];
X509Certificate* cert1 = certificates[1];
X509Certificate* certn_2 = certificates[certificates.size() - 2];
X509Certificate* certn_1 = certificates[certificates.size() - 1];
if (CERT_CompareName(&cert1->os_cert_handle()->issuer,
&cert0->os_cert_handle()->subject) == SECEqual)
return cert0;
if (CERT_CompareName(&certn_2->os_cert_handle()->issuer,
&certn_1->os_cert_handle()->subject) == SECEqual)
return certn_1;
VLOG(1) << "certificate list is not a hierarchy";
return cert0;
}
bool CertDatabase::ImportCACerts(const CertificateList& certificates,
unsigned int trust_bits,
ImportCertFailureList* not_imported) {
X509Certificate* root = FindRootInList(certificates);
return psm::ImportCACerts(certificates, root, trust_bits, not_imported);
}
bool CertDatabase::ImportServerCert(const CertificateList& certificates,
ImportCertFailureList* not_imported) {
return psm::ImportServerCert(certificates, not_imported);
}
unsigned int CertDatabase::GetCertTrust(
const X509Certificate* cert, CertType type) const {
CERTCertTrust nsstrust;
SECStatus srv = CERT_GetCertTrust(cert->os_cert_handle(), &nsstrust);
if (srv != SECSuccess) {
LOG(ERROR) << "CERT_GetCertTrust failed with error " << PORT_GetError();
return UNTRUSTED;
}
psm::nsNSSCertTrust trust(&nsstrust);
switch (type) {
case CA_CERT:
return trust.HasTrustedCA(PR_TRUE, PR_FALSE, PR_FALSE) * TRUSTED_SSL +
trust.HasTrustedCA(PR_FALSE, PR_TRUE, PR_FALSE) * TRUSTED_EMAIL +
trust.HasTrustedCA(PR_FALSE, PR_FALSE, PR_TRUE) * TRUSTED_OBJ_SIGN;
case SERVER_CERT:
return trust.HasTrustedPeer(PR_TRUE, PR_FALSE, PR_FALSE) * TRUSTED_SSL +
trust.HasTrustedPeer(PR_FALSE, PR_TRUE, PR_FALSE) * TRUSTED_EMAIL +
trust.HasTrustedPeer(PR_FALSE, PR_FALSE, PR_TRUE) * TRUSTED_OBJ_SIGN;
default:
return UNTRUSTED;
}
}
bool CertDatabase::SetCertTrust(const X509Certificate* cert,
CertType type,
unsigned int trusted) {
return psm::SetCertTrust(cert, type, trusted);
}
bool CertDatabase::DeleteCertAndKey(const X509Certificate* cert) {
// For some reason, PK11_DeleteTokenCertAndKey only calls
// SEC_DeletePermCertificate if the private key is found. So, we check
// whether a private key exists before deciding which function to call to
// delete the cert.
SECKEYPrivateKey *privKey = PK11_FindKeyByAnyCert(cert->os_cert_handle(),
NULL);
if (privKey) {
SECKEY_DestroyPrivateKey(privKey);
if (PK11_DeleteTokenCertAndKey(cert->os_cert_handle(), NULL)) {
LOG(ERROR) << "PK11_DeleteTokenCertAndKey failed: " << PORT_GetError();
return false;
}
} else {
if (SEC_DeletePermCertificate(cert->os_cert_handle())) {
LOG(ERROR) << "SEC_DeletePermCertificate failed: " << PORT_GetError();
return false;
}
}
return true;
}
bool CertDatabase::IsReadOnly(const X509Certificate* cert) const {
PK11SlotInfo* slot = cert->os_cert_handle()->slot;
return slot && PK11_IsReadOnly(slot);
}
} // namespace net
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