Extension API enterprise.platformKeys.

chrome/browser/extensions/api/enterprise_platform_keys/token_method_nss.cc

+// Copyright 2014 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 "chrome/browser/extensions/api/enterprise_platform_keys/token_method_nss.h"
+
+#include <cryptohi.h>
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/callback.h"
+#include "base/logging.h"
+#include "chrome/browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_api.h"
+#include "chrome/browser/net/nss_context.h"
+#include "crypto/rsa_private_key.h"
+#include "net/base/crypto_module.h"
+#include "net/base/net_errors.h"
+#include "net/cert/cert_database.h"
+#include "net/cert/nss_cert_database.h"
+#include "net/cert/x509_certificate.h"
+
+namespace {
+const char kErrorInternal[] = "Internal Error";
+const char kErrorKeyNotFound[] = "Key not found.";
+const char kErrorInvalidX509Cert[] =
+    "Certificate is not a valid X.509 certificate.";
+const char kErrorCertificateNotFound[] = "Certificate could not be found.";
+const char kErrorAlgorithmNotSupported[] = "Algorithm not supported.";
+}
+
+namespace extensions {
+
+namespace enterprise_platform_keys {
+
+namespace nss {
+
+namespace {
+
+namespace api_epk = api::enterprise_platform_keys;
+namespace api_epki = api::enterprise_platform_keys_internal;
+
+typedef base::Callback<void(scoped_refptr<TokenMethodExtensionFunction> func,
+                            crypto::ScopedPK11Slot slot,
+                            net::NSSCertDatabase* cert_db)> GetCertDBCallback;
+
+void DidGetCertDB(scoped_refptr<TokenMethodExtensionFunction> func,
+                  const GetCertDBCallback& callback,
+                  net::NSSCertDatabase* cert_db) {
+  if (!cert_db) {
+    LOG(ERROR) << "Couldn't get NSSCertDatabase.";
+    func->RespondWithError(kErrorInternal);
+    return;
+  }
+
+  crypto::ScopedPK11Slot slot = cert_db->GetPrivateSlot();
+  if (!slot) {
+    LOG(ERROR) << "No private slot";
+    func->RespondWithError(kErrorInternal);
+    return;
+  }
+  callback.Run(func, slot.Pass(), cert_db);
+}
+
+void GetCertDatabase(scoped_refptr<TokenMethodExtensionFunction> func,
+                     const std::string& token_id,
+                     const GetCertDBCallback& callback) {
+  GetNSSCertDatabaseForProfile(func->GetProfile(),
+                               base::Bind(&DidGetCertDB, func, callback));
+}
+
+void GenerateWithDB(scoped_ptr<api_epki::GenerateKey::Params> params,
+                    scoped_refptr<TokenMethodExtensionFunction> func,
+                    crypto::ScopedPK11Slot slot,
+                    net::NSSCertDatabase* cert_db) {
+  const int modulus_length = params->modulus_length;
+  if (modulus_length > 2048) {
+    func->RespondWithError(kErrorAlgorithmNotSupported);
+    return;
+  }
+  scoped_ptr<crypto::RSAPrivateKey> rsa_key(
+      crypto::RSAPrivateKey::CreateSensitive(slot.get(), modulus_length));
+  if (!rsa_key) {
+    LOG(ERROR) << "Couldn't create key.";
+    func->RespondWithError(kErrorInternal);
+    return;
+  }
+
+  std::vector<uint8> public_key_der;
+  if (!rsa_key->ExportPublicKey(&public_key_der)) {
+    // TODO(pneubeck): Remove rsa_key from storage.
+    LOG(ERROR) << "Couldn't export public key.";
+    func->RespondWithError(kErrorInternal);
+    return;
+  }
+  std::string public_key_der_str(public_key_der.begin(), public_key_der.end());
+
+  func->RespondWithResults(
+      api_epki::GenerateKey::Results::Create(public_key_der_str));
+}
+
+void SignWithDB(scoped_ptr<api_epki::Sign::Params> params,
+                scoped_refptr<TokenMethodExtensionFunction> func,
+                crypto::ScopedPK11Slot slot,
+                net::NSSCertDatabase* cert_db) {
+  const std::string& public_key = params->public_key;
+  const uint8* public_key_uint8 =
+      reinterpret_cast<const uint8*>(public_key.data());
+  std::vector<uint8> public_key_vector(public_key_uint8,
+                                       public_key_uint8 + public_key.size());
+
+  // TODO(pneubeck): This searches all slots. Change to look only at |slot_|.
+  scoped_ptr<crypto::RSAPrivateKey> rsa_key(
+      crypto::RSAPrivateKey::FindFromPublicKeyInfo(public_key_vector));
+  if (!rsa_key) {
+    func->RespondWithError(kErrorKeyNotFound);
+    return;
+  }
+
+  const std::string& data = params->data;
+  SECItem sign_result = {siBuffer, NULL, 0};
+  if (SEC_SignData(&sign_result,
+                   reinterpret_cast<const unsigned char*>(data.data()),
+                   data.size(),
+                   rsa_key->key(),
+                   SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION) != SECSuccess) {
+    LOG(ERROR) << "Couldn't sign.";
+    func->RespondWithError(kErrorInternal);
+    return;
+  }
+
+  std::string signature(reinterpret_cast<const char*>(sign_result.data),
+                        sign_result.len);
+  func->RespondWithResults(api_epki::Sign::Results::Create(signature));
+}
+
+void DidGetCerts(scoped_refptr<TokenMethodExtensionFunction> func,
+                 crypto::ScopedPK11Slot slot,
+                 scoped_ptr<net::CertificateList> certs) {
+  //  std::vector<std::string> client_certs;
+  scoped_ptr<base::ListValue> client_certs(new base::ListValue());
+  for (net::CertificateList::const_iterator it = certs->begin();
+       it != certs->end();
+       ++it) {
+    net::X509Certificate::OSCertHandle cert_handle = (*it)->os_cert_handle();
+    crypto::ScopedPK11Slot cert_slot(PK11_KeyForCertExists(cert_handle,
+                                                           NULL,    // keyPtr
+                                                           NULL));  // wincx
+
+    // Keep only user certificate, i.e. certs for which the private key is
+    // present, and certs where the private key is stored in the queried slot.
+    if (cert_slot != slot)
+      continue;
+
+    std::string der_encoding;
+    net::X509Certificate::GetDEREncoded(cert_handle, &der_encoding);
+    //    client_certs.push_back(der_encoding);
+    client_certs->Append(base::BinaryValue::CreateWithCopiedBuffer(
+        der_encoding.data(), der_encoding.size()));
+  }
+  scoped_ptr<base::ListValue> results(new base::ListValue());
+  results->Append(client_certs.release());
+  func->RespondWithResults(results.Pass());
+  //  results_ = api_eci::GetClientCertificates::Results::Create(client_certs);
+}
+
+void GetCertsWithDB(scoped_ptr<api_epk::GetCertificates::Params> params,
+                    scoped_refptr<TokenMethodExtensionFunction> func,
+                    crypto::ScopedPK11Slot slot,
+                    net::NSSCertDatabase* cert_db) {
+  PK11SlotInfo* slot_ptr = slot.get();
+  cert_db->ListCertsInSlot(base::Bind(&DidGetCerts, func, base::Passed(&slot)),
+                           slot_ptr);
+}
+
+void ImportWithDB(scoped_ptr<api_epk::ImportCertificate::Params> params,
+                  scoped_refptr<TokenMethodExtensionFunction> func,
+                  crypto::ScopedPK11Slot slot,
+                  net::NSSCertDatabase* cert_db) {
+  const std::string& certificate = params->certificate;
+  scoped_refptr<net::X509Certificate> cert_x509 =
+      net::X509Certificate::CreateFromBytes(certificate.data(),
+                                            certificate.size());
+  if (!cert_x509) {
+    func->RespondWithError(kErrorInvalidX509Cert);
+    return;
+  }
+
+  net::CertDatabase* db = net::CertDatabase::GetInstance();
+
+  const net::Error cert_status = db->CheckUserCert(cert_x509);
+  if (cert_status == net::ERR_NO_PRIVATE_KEY_FOR_CERT) {
+    func->RespondWithError(kErrorKeyNotFound);
+    return;
+  } else if (cert_status != net::OK) {
+    func->RespondWithError(net::ErrorToString(cert_status));
+    return;
+  }
+
+  const net::Error import_status = db->AddUserCert(cert_x509.get());
+  if (import_status != net::OK) {
+    LOG(ERROR) << "Could not import certificate.";
+    func->RespondWithError(net::ErrorToString(import_status));
+    return;
+  }
+
+  func->RespondWithoutResult();
+}
+
+void RemoveWithDB(scoped_ptr<api_epk::RemoveCertificate::Params> params,
+                  scoped_refptr<TokenMethodExtensionFunction> func,
+                  crypto::ScopedPK11Slot slot,
+                  net::NSSCertDatabase* cert_db) {
+  const std::string& certificate = params->certificate;
+  scoped_refptr<net::X509Certificate> cert_x509 =
+      net::X509Certificate::CreateFromBytes(certificate.data(),
+                                            certificate.size());
+  if (!cert_x509) {
+    func->RespondWithError(kErrorInvalidX509Cert);
+    return;
+  }
+
+  bool certificate_found = cert_x509->os_cert_handle()->isperm;
+  bool success = cert_db->DeleteCertAndKey(cert_x509);
+
+  // CertificateNotFound error has precedence over an internal error.
+  if (!certificate_found) {
+    func->RespondWithError(kErrorCertificateNotFound);
+    return;
+  }
+  if (!success) {
+    func->RespondWithError(kErrorInternal);
+    return;
+  }
+
+  func->RespondWithoutResult();
+}
+
+}  // namespace
+
+void Generate(scoped_refptr<TokenMethodExtensionFunction> func,
+              scoped_ptr<api_epki::GenerateKey::Params> params) {
+  GetCertDatabase(func,
+                  params->token_id,
+                  base::Bind(GenerateWithDB, base::Passed(&params)));
+}
+
+void Sign(scoped_refptr<TokenMethodExtensionFunction> func,
+          scoped_ptr<api_epki::Sign::Params> params) {
+  GetCertDatabase(
+      func, params->token_id, base::Bind(SignWithDB, base::Passed(&params)));
+}
+
+void GetCerts(scoped_refptr<TokenMethodExtensionFunction> func,
+              scoped_ptr<api_epk::GetCertificates::Params> params) {
+  GetCertDatabase(func,
+                  params->token_id,
+                  base::Bind(GetCertsWithDB, base::Passed(&params)));
+}
+
+void Import(scoped_refptr<TokenMethodExtensionFunction> func,
+            scoped_ptr<api_epk::ImportCertificate::Params> params) {
+  GetCertDatabase(
+      func, params->token_id, base::Bind(ImportWithDB, base::Passed(&params)));
+}
+
+void Remove(scoped_refptr<TokenMethodExtensionFunction> func,
+            scoped_ptr<api_epk::RemoveCertificate::Params> params) {
+  GetCertDatabase(
+      func, params->token_id, base::Bind(RemoveWithDB, base::Passed(&params)));
+}
+
+}  // namespace nss
+
+}  // namespace enterprise_platform_keys
+
+}  // namespace extensions