Added CreateOriginBound method to x509_certificate.h.

net/base/x509_certificate_nss.cc

Index: net/base/x509_certificate_nss.cc
diff --git a/net/base/x509_certificate_nss.cc b/net/base/x509_certificate_nss.cc
index 7224020cb44e528318c204f10f3d6e70ff0dced2..3b23f936c06fce1f735835a08fa4087a7b6ae0f2 100644
--- a/net/base/x509_certificate_nss.cc
+++ b/net/base/x509_certificate_nss.cc
@@ -18,6 +18,7 @@
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/singleton.h"
 #include "base/pickle.h"
 #include "base/time.h"
 #include "crypto/nss_util.h"
@@ -31,6 +32,50 @@ namespace net {
 
 namespace {
 
+class ObCertOIDWrapper {
+ public:
+  static ObCertOIDWrapper* GetInstance() {
+    // Instantiated as a leaky singleton to allow the singleton to be
+    // constructed on a worker thead that is not joined when a process
+    // shuts down.
+    return Singleton<ObCertOIDWrapper,
+                     LeakySingletonTraits<ObCertOIDWrapper> >::get();
+  }
+
+  SECOidTag ob_cert_oid_tag() const {
+    return ob_cert_oid_tag_;
+  }
+
+ private:
+  friend struct DefaultSingletonTraits<ObCertOIDWrapper>;
+
+  ObCertOIDWrapper();
+
+  SECOidTag ob_cert_oid_tag_;
+
+  DISALLOW_COPY_AND_ASSIGN(ObCertOIDWrapper);
+};
+
+ObCertOIDWrapper::ObCertOIDWrapper(): ob_cert_oid_tag_(SEC_OID_UNKNOWN) {
+  // 1.3.6.1.4.1.11129.2.1.6
+  // (iso.org.dod.internet.private.enterprises.google.googleSecurity.
+  //  certificateExtensions.originBoundCertificate)
+  static const uint8 kObCertOID[] = {
+    0x2b, 0x06, 0x01, 0x04, 0x01, 0xd6, 0x79, 0x02, 0x01, 0x06
+  };
+  SECOidData oid_data;
+  memset(&oid_data, 0, sizeof(oid_data));
+  oid_data.oid.data = const_cast<uint8*>(kObCertOID);
+  oid_data.oid.len = sizeof(kObCertOID);
+  oid_data.offset = SEC_OID_UNKNOWN;
+  oid_data.desc = "Origin Bound Certificate";
+  oid_data.mechanism = CKM_INVALID_MECHANISM;
+  oid_data.supportedExtension = SUPPORTED_CERT_EXTENSION;
+  ob_cert_oid_tag_ = SECOID_AddEntry(&oid_data);
+  if (ob_cert_oid_tag_ == SEC_OID_UNKNOWN)
+    LOG(ERROR) << "OB_CERT OID tag creation failed";
+}
+
 class ScopedCERTCertificatePolicies {
  public:
   explicit ScopedCERTCertificatePolicies(CERTCertificatePolicies* policies)
@@ -623,14 +668,16 @@ void X509Certificate::Initialize() {
     serial_number_ = serial_number_.substr(1, serial_number_.size() - 1);
 }
 
-// static
-X509Certificate* X509Certificate::CreateSelfSigned(
+// Creates a Certificate object that may be passed to the SignCertificate
+// method to generate an X509 certificate.
+// Returns NULL if an error is encountered in the certificate creation
+// process.
+// Caller responsible for freeing returned certificate object.
+static CERTCertificate* CreateCertificate(
     crypto::RSAPrivateKey* key,
     const std::string& subject,
     uint32 serial_number,
     base::TimeDelta valid_duration) {
-  DCHECK(key);
-
   // Create info about public key.
   CERTSubjectPublicKeyInfo* spki =
       SECKEY_CreateSubjectPublicKeyInfo(key->public_key());
@@ -668,12 +715,24 @@ X509Certificate* X509Certificate::CreateSelfSigned(
   CERT_DestroyValidity(validity);
   CERT_DestroyCertificateRequest(cert_request);
 
-  if (!cert)
-    return NULL;
-
-  // Sign the cert here. The logic of this method references SignCert() in NSS
-  // utility certutil: http://mxr.mozilla.org/security/ident?i=SignCert.
+  return cert;
+}
 
+// Signs a certificate object, with |key| generating a new X509Certificate
+// and destroying the passed certificate object (even when NULL is returned).
+// The logic of this method references SignCert() in NSS utility certutil:
+// http://mxr.mozilla.org/security/ident?i=SignCert.
+// Returns NULL if an error is encountered in the certificate signing
+// process.
+// Caller responsible for freeing returned X509Certificate object.
+//
+// TODO: change this function to return
+// a success/failure status, and not create an X509Certificate
+// object, and not destroy |cert| on failure.  Let the caller
+// create the X509Certificate object and destroy |cert|.
+static X509Certificate* SignCertificate(
+    CERTCertificate* cert,
+    crypto::RSAPrivateKey* key) {
   // |arena| is used to encode the cert.
   PRArenaPool* arena = cert->arena;
   SECOidTag algo_id = SEC_GetSignatureAlgorithmOidTag(key->key()->keyType,
@@ -722,11 +781,92 @@ X509Certificate* X509Certificate::CreateSelfSigned(
   // Save the signed result to the cert.
   cert->derCert = *result;
 
-  X509Certificate* x509_cert = CreateFromHandle(cert, OSCertHandles());
+  X509Certificate* x509_cert =
+      X509Certificate::CreateFromHandle(cert, X509Certificate::OSCertHandles());
   CERT_DestroyCertificate(cert);
   return x509_cert;
 }
 
+// static
+X509Certificate* X509Certificate::CreateSelfSigned(
+    crypto::RSAPrivateKey* key,
+    const std::string& subject,
+    uint32 serial_number,
+    base::TimeDelta valid_duration) {
+  DCHECK(key);
+
+  CERTCertificate* cert = CreateCertificate(key,
+                                            subject,
+                                            serial_number,
+                                            valid_duration);
+
+  if (!cert)
+    return NULL;
+
+  X509Certificate* x509_cert = SignCertificate(cert, key);
+
+  return x509_cert;
+}
+
+// static
+X509Certificate* X509Certificate::CreateOriginBound(
+    crypto::RSAPrivateKey* key,
+    const std::string& origin,
+    uint32 serial_number,
+    base::TimeDelta valid_duration) {
+  DCHECK(key);
+
+  CERTCertificate* cert = CreateCertificate(key,
+                                            "CN=anonymous.invalid",
+                                            serial_number,
+                                            valid_duration);
+
+  if (!cert)
+    return NULL;
+
+  // Create opaque handle used to add extensions later.
+  void* cert_handle;
+  if ((cert_handle = CERT_StartCertExtensions(cert)) == NULL) {
+    LOG(ERROR) << "Unable to get opaque handle for adding extensions";
+    return NULL;
+  }
+
+  // Create SECItem for IA5String encoding.
+  SECItem origin_string_item = {
+    siAsciiString,
+    (unsigned char*)origin.data(),
+    origin.size()
+  };
+
+  // IA5Encode and arena allocate SECItem
+  SECItem* asn1_origin_string = SEC_ASN1EncodeItem(
+      cert->arena, NULL, &origin_string_item,
+      SEC_ASN1_GET(SEC_IA5StringTemplate));
+  if (asn1_origin_string == NULL) {
+    LOG(ERROR) << "Unable to get ASN1 encoding for origin in ob_cert extension";
+    return NULL;
+  }
+
+  // Add the extension to the opaque handle
+  if (CERT_AddExtension(cert_handle,
+                        ObCertOIDWrapper::GetInstance()->ob_cert_oid_tag(),
+                        asn1_origin_string,
+                        PR_TRUE, PR_TRUE) != SECSuccess){
+    LOG(ERROR) << "Unable to add origin bound cert extension to opaque handle";
+    return NULL;
+  }
+
+  // Copy extension into x509 cert
+  if (CERT_FinishExtensions(cert_handle) != SECSuccess){
+    LOG(ERROR) << "Unable to copy extension to X509 cert";
+    return NULL;
+  }
+
+  X509Certificate* x509_cert = SignCertificate(cert, key);
+
+  return x509_cert;
+}
+
 void X509Certificate::GetSubjectAltName(
     std::vector<std::string>* dns_names,
     std::vector<std::string>* ip_addrs) const {