Implement Networking Private API VerifyAndEncryptCredentials method

chrome/common/extensions/api/networking_private/networking_private_crypto.cc

 // Copyright 2013 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/networking_private/networking_private_crypto.h"
+#include "chrome/common/extensions/api/networking_private/networking_private_crypto.h"
 
 #include <cert.h>
 #include <cryptohi.h>
 #include <keyhi.h>
 #include <keythi.h>
 #include <pk11pub.h>
 #include <sechash.h>
 #include <secport.h>
 
 #include "base/base64.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "crypto/nss_util.h"
 #include "crypto/rsa_private_key.h"
 #include "crypto/scoped_nss_types.h"
 #include "net/cert/pem_tokenizer.h"
 #include "net/cert/x509_certificate.h"
 
 const unsigned char kTrustedCAPublicKeyDER[] = {
-  0x30, 0x82, 0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xbc, 0x22, 0x80, 0xbd,
-  0x80, 0xf6, 0x3a, 0x21, 0x00, 0x3b, 0xae, 0x76, 0x5e, 0x35, 0x7f, 0x3d, 0xc3,
-  0x64, 0x5c, 0x55, 0x94, 0x86, 0x34, 0x2f, 0x05, 0x87, 0x28, 0xcd, 0xf7, 0x69,
-  0x8c, 0x17, 0xb3, 0x50, 0xa7, 0xb8, 0x82, 0xfa, 0xdf, 0xc7, 0x43, 0x2d, 0xd6,
-  0x7e, 0xab, 0xa0, 0x6f, 0xb7, 0x13, 0x72, 0x80, 0xa4, 0x47, 0x15, 0xc1, 0x20,
-  0x99, 0x50, 0xcd, 0xec, 0x14, 0x62, 0x09, 0x5b, 0xa4, 0x98, 0xcd, 0xd2, 0x41,
-  0xb6, 0x36, 0x4e, 0xff, 0xe8, 0x2e, 0x32, 0x30, 0x4a, 0x81, 0xa8, 0x42, 0xa3,
-  0x6c, 0x9b, 0x33, 0x6e, 0xca, 0xb2, 0xf5, 0x53, 0x66, 0xe0, 0x27, 0x53, 0x86,
-  0x1a, 0x85, 0x1e, 0xa7, 0x39, 0x3f, 0x4a, 0x77, 0x8e, 0xfb, 0x54, 0x66, 0x66,
-  0xfb, 0x58, 0x54, 0xc0, 0x5e, 0x39, 0xc7, 0xf5, 0x50, 0x06, 0x0b, 0xe0, 0x8a,
-  0xd4, 0xce, 0xe1, 0x6a, 0x55, 0x1f, 0x8b, 0x17, 0x00, 0xe6, 0x69, 0xa3, 0x27,
-  0xe6, 0x08, 0x25, 0x69, 0x3c, 0x12, 0x9d, 0x8d, 0x05, 0x2c, 0xd6, 0x2e, 0xa2,
-  0x31, 0xde, 0xb4, 0x52, 0x50, 0xd6, 0x20, 0x49, 0xde, 0x71, 0xa0, 0xf9, 0xad,
-  0x20, 0x40, 0x12, 0xf1, 0xdd, 0x25, 0xeb, 0xd5, 0xe6, 0xb8, 0x36, 0xf4, 0xd6,
-  0x8f, 0x7f, 0xca, 0x43, 0xdc, 0xd7, 0x10, 0x5b, 0xe6, 0x3f, 0x51, 0x8a, 0x85,
-  0xb3, 0xf3, 0xff, 0xf6, 0x03, 0x2d, 0xcb, 0x23, 0x4f, 0x9c, 0xad, 0x18, 0xe7,
-  0x93, 0x05, 0x8c, 0xac, 0x52, 0x9a, 0xf7, 0x4c, 0xe9, 0x99, 0x7a, 0xbe, 0x6e,
-  0x7e, 0x4d, 0x0a, 0xe3, 0xc6, 0x1c, 0xa9, 0x93, 0xfa, 0x3a, 0xa5, 0x91, 0x5d,
-  0x1c, 0xbd, 0x66, 0xeb, 0xcc, 0x60, 0xdc, 0x86, 0x74, 0xca, 0xcf, 0xf8, 0x92,
-  0x1c, 0x98, 0x7d, 0x57, 0xfa, 0x61, 0x47, 0x9e, 0xab, 0x80, 0xb7, 0xe4, 0x48,
-  0x80, 0x2a, 0x92, 0xc5, 0x1b, 0x02, 0x03, 0x01, 0x00, 0x01 };
+    0x30, 0x82, 0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xbc, 0x22, 0x80,
+    0xbd, 0x80, 0xf6, 0x3a, 0x21, 0x00, 0x3b, 0xae, 0x76, 0x5e, 0x35, 0x7f,
+    0x3d, 0xc3, 0x64, 0x5c, 0x55, 0x94, 0x86, 0x34, 0x2f, 0x05, 0x87, 0x28,
+    0xcd, 0xf7, 0x69, 0x8c, 0x17, 0xb3, 0x50, 0xa7, 0xb8, 0x82, 0xfa, 0xdf,
+    0xc7, 0x43, 0x2d, 0xd6, 0x7e, 0xab, 0xa0, 0x6f, 0xb7, 0x13, 0x72, 0x80,
+    0xa4, 0x47, 0x15, 0xc1, 0x20, 0x99, 0x50, 0xcd, 0xec, 0x14, 0x62, 0x09,
+    0x5b, 0xa4, 0x98, 0xcd, 0xd2, 0x41, 0xb6, 0x36, 0x4e, 0xff, 0xe8, 0x2e,
+    0x32, 0x30, 0x4a, 0x81, 0xa8, 0x42, 0xa3, 0x6c, 0x9b, 0x33, 0x6e, 0xca,
+    0xb2, 0xf5, 0x53, 0x66, 0xe0, 0x27, 0x53, 0x86, 0x1a, 0x85, 0x1e, 0xa7,
+    0x39, 0x3f, 0x4a, 0x77, 0x8e, 0xfb, 0x54, 0x66, 0x66, 0xfb, 0x58, 0x54,
+    0xc0, 0x5e, 0x39, 0xc7, 0xf5, 0x50, 0x06, 0x0b, 0xe0, 0x8a, 0xd4, 0xce,
+    0xe1, 0x6a, 0x55, 0x1f, 0x8b, 0x17, 0x00, 0xe6, 0x69, 0xa3, 0x27, 0xe6,
+    0x08, 0x25, 0x69, 0x3c, 0x12, 0x9d, 0x8d, 0x05, 0x2c, 0xd6, 0x2e, 0xa2,
+    0x31, 0xde, 0xb4, 0x52, 0x50, 0xd6, 0x20, 0x49, 0xde, 0x71, 0xa0, 0xf9,
+    0xad, 0x20, 0x40, 0x12, 0xf1, 0xdd, 0x25, 0xeb, 0xd5, 0xe6, 0xb8, 0x36,
+    0xf4, 0xd6, 0x8f, 0x7f, 0xca, 0x43, 0xdc, 0xd7, 0x10, 0x5b, 0xe6, 0x3f,
+    0x51, 0x8a, 0x85, 0xb3, 0xf3, 0xff, 0xf6, 0x03, 0x2d, 0xcb, 0x23, 0x4f,
+    0x9c, 0xad, 0x18, 0xe7, 0x93, 0x05, 0x8c, 0xac, 0x52, 0x9a, 0xf7, 0x4c,
+    0xe9, 0x99, 0x7a, 0xbe, 0x6e, 0x7e, 0x4d, 0x0a, 0xe3, 0xc6, 0x1c, 0xa9,
+    0x93, 0xfa, 0x3a, 0xa5, 0x91, 0x5d, 0x1c, 0xbd, 0x66, 0xeb, 0xcc, 0x60,
+    0xdc, 0x86, 0x74, 0xca, 0xcf, 0xf8, 0x92, 0x1c, 0x98, 0x7d, 0x57, 0xfa,
+    0x61, 0x47, 0x9e, 0xab, 0x80, 0xb7, 0xe4, 0x48, 0x80, 0x2a, 0x92, 0xc5,
+    0x1b, 0x02, 0x03, 0x01, 0x00, 0x01};
 
 namespace {
 
 // Parses |pem_data| for a PEM block of |pem_type|.
 // Returns true if a |pem_type| block is found, storing the decoded result in
 // |der_output|.
 bool GetDERFromPEM(const std::string& pem_data,
                    const std::string& pem_type,
                    std::string* der_output) {
   std::vector<std::string> headers;
@@ skipping 20 matching lines @@
     const std::string& connected_mac) {
   crypto::EnsureNSSInit();
 
   std::string cert_data;
   if (!GetDERFromPEM(certificate, "CERTIFICATE", &cert_data)) {
     LOG(ERROR) << "Failed to parse certificate.";
     return false;
   }
   SECItem der_cert;
   der_cert.type = siDERCertBuffer;
-  der_cert.data = reinterpret_cast<unsigned char*>(
-      const_cast<char*>(cert_data.c_str()));
+  der_cert.data =
+      reinterpret_cast<unsigned char*>(const_cast<char*>(cert_data.c_str()));

[palmer, 2014/03/03 22:17:42]

These casts look a bit abusive, at least the const_cast.

Isn't string::data a better choice than string::c_str for this? (Of course,
really, GetDERFromPEM should fill a byte array/vector, not a string.)

[mef, 2014/03/04 21:57:03]

Done.

   der_cert.len = cert_data.length();
 
   // Parse into a certificate structure.
   typedef scoped_ptr<
       CERTCertificate,
       crypto::NSSDestroyer<CERTCertificate, CERT_DestroyCertificate> >
-          ScopedCERTCertificate;
+      ScopedCERTCertificate;
   ScopedCERTCertificate cert(CERT_NewTempCertificate(
       CERT_GetDefaultCertDB(), &der_cert, NULL, PR_FALSE, PR_TRUE));
   if (!cert.get()) {
     LOG(ERROR) << "Failed to parse certificate.";
     return false;
   }
 
   // Check that the certificate is signed by trusted CA.
   SECItem trusted_ca_key_der_item;
   trusted_ca_key_der_item.type = siDERCertBuffer;
-  trusted_ca_key_der_item.data = const_cast<unsigned char*>(
-      kTrustedCAPublicKeyDER),
+  trusted_ca_key_der_item.data =
+      const_cast<unsigned char*>(kTrustedCAPublicKeyDER),
   trusted_ca_key_der_item.len = sizeof(kTrustedCAPublicKeyDER);
   crypto::ScopedSECKEYPublicKey ca_public_key(
       SECKEY_ImportDERPublicKey(&trusted_ca_key_der_item, CKK_RSA));
   SECStatus verified = CERT_VerifySignedDataWithPublicKey(
       &cert->signatureWrap, ca_public_key.get(), NULL);
   if (verified != SECSuccess) {
     LOG(ERROR) << "Certificate is not issued by the trusted CA.";
     return false;
   }
 
@@ skipping 16 matching lines @@
 
   // Make sure that the certificate matches the unsigned data presented.
   // Verify that the |signature| matches |data|.
   crypto::ScopedSECKEYPublicKey public_key(CERT_ExtractPublicKey(cert.get()));
   if (!public_key.get()) {
     LOG(ERROR) << "Unable to extract public key from certificate.";
     return false;
   }
   SECItem signature_item;
   signature_item.type = siBuffer;
-  signature_item.data = reinterpret_cast<unsigned char*>(
-      const_cast<char*>(signature.c_str()));
+  signature_item.data =
+      reinterpret_cast<unsigned char*>(const_cast<char*>(signature.c_str()));
   signature_item.len = static_cast<unsigned int>(signature.size());
-  verified = VFY_VerifyDataDirect(reinterpret_cast<unsigned char*>(
-      const_cast<char*>(data.c_str())), data.size(),
-      public_key.get(), &signature_item, SEC_OID_PKCS1_RSA_ENCRYPTION,
-      SEC_OID_SHA1, NULL, NULL);
+  verified = VFY_VerifyDataDirect(
+      reinterpret_cast<unsigned char*>(const_cast<char*>(data.c_str())),
+      data.size(),
+      public_key.get(),
+      &signature_item,
+      SEC_OID_PKCS1_RSA_ENCRYPTION,
+      SEC_OID_SHA1,
+      NULL,
+      NULL);
   if (verified != SECSuccess) {
     LOG(ERROR) << "Signed blobs did not match.";
     return false;
   }
   return true;
 }
 
 bool NetworkingPrivateCrypto::EncryptByteString(const std::string& pub_key_der,
                                                 const std::string& data,
                                                 std::string* encrypted_output) {
   crypto::EnsureNSSInit();
 
   SECItem pub_key_der_item;
   pub_key_der_item.type = siDERCertBuffer;
-  pub_key_der_item.data = reinterpret_cast<unsigned char*>(
-      const_cast<char*>(pub_key_der.c_str()));
+  pub_key_der_item.data =
+      reinterpret_cast<unsigned char*>(const_cast<char*>(pub_key_der.c_str()));

[palmer, 2014/03/03 22:17:42]

Same concerns as above.

[mef, 2014/03/04 21:57:03]

Done.

   pub_key_der_item.len = pub_key_der.size();
 
-  crypto::ScopedSECKEYPublicKey public_key(SECKEY_ImportDERPublicKey(
-      &pub_key_der_item, CKK_RSA));
+  crypto::ScopedSECKEYPublicKey public_key(
+      SECKEY_ImportDERPublicKey(&pub_key_der_item, CKK_RSA));
   if (!public_key.get()) {
     LOG(ERROR) << "Failed to parse public key.";
     return false;
   }
 
   size_t encrypted_length = SECKEY_PublicKeyStrength(public_key.get());
   // RSAES is defined as operating on messages up to a length of k - 11, where
   // k is the octet length of the RSA modulus.
   if (encrypted_length < data.size() + 11) {
     LOG(ERROR) << "Too much data to encrypt.";
@@ skipping 48 matching lines @@
                                 const_cast<char*>(encrypted_data.data())),
                             encrypted_data.length());
   if (decrypted != SECSuccess) {
     LOG(ERROR) << "Error during decryption.";
     return false;
   }
   decrypted_output->assign(reinterpret_cast<char*>(rsa_output.get()),
                            output_length);
   return true;
 }
-