net/cert/jwk_serializer_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/cert/jwk_serializer.h"
   6
   7 #include "base/base64.h"
   8 #include "base/values.h"
   9 #include "testing/gtest/include/gtest/gtest.h"
  10
  11 namespace net {
  12
  13 // This is the ASN.1 prefix for a P-256 public key. Specifically it's:
  14 // SEQUENCE
  15 //   SEQUENCE
  16 //     OID id-ecPublicKey
  17 //     OID prime256v1
  18 //   BIT STRING, length 66, 0 trailing bits: 0x04
  19 //
  20 // The 0x04 in the BIT STRING is the prefix for an uncompressed, X9.62
  21 // public key. Following that are the two field elements as 32-byte,
  22 // big-endian numbers, as required by the Channel ID.
  23 static const unsigned char kP256SpkiPrefix[] = {
  24     0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86,
  25     0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a,
  26     0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03,
  27     0x42, 0x00, 0x04
  28 };
  29 static const unsigned int kEcCoordinateSize = 32U;
  30
  31 // This is a valid P-256 public key.
  32 static const unsigned char kSpkiEc[] = {
  33     0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86,
  34     0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a,
  35     0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03,
  36     0x42, 0x00, 0x04,
  37     0x29, 0x5d, 0x6e, 0xfe, 0x33, 0x77, 0x26, 0xea,
  38     0x5b, 0xa4, 0xe6, 0x1b, 0x34, 0x6e, 0x7b, 0xa0,
  39     0xa3, 0x8f, 0x33, 0x49, 0xa0, 0x9c, 0xae, 0x98,
  40     0xbd, 0x46, 0x0d, 0xf6, 0xd4, 0x5a, 0xdc, 0x8a,
  41     0x1f, 0x8a, 0xb2, 0x20, 0x51, 0xb7, 0xd2, 0x87,
  42     0x0d, 0x53, 0x7e, 0x5d, 0x94, 0xa3, 0xe0, 0x34,
  43     0x16, 0xa1, 0xcc, 0x10, 0x48, 0xcd, 0x70, 0x9c,
  44     0x05, 0xd3, 0xd2, 0xca, 0xdf, 0x44, 0x2f, 0xf4
  45 };
  46
  47 // This is a P-256 public key with 0 X and Y values.
  48 static const unsigned char kSpkiEcWithZeroXY[] = {
  49     0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86,
  50     0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a,
  51     0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03,
  52     0x42, 0x00, 0x04,
  53     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  54     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  55     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  56     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  57     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  58     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  59     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  60     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  61 };
  62
  63 #if !defined(USE_OPENSSL)
  64
  65 TEST(JwkSerializerNSSTest, ConvertSpkiFromDerToJwkEc) {
  66   base::StringPiece spki;
  67   base::DictionaryValue public_key_jwk;
  68
  69   EXPECT_FALSE(JwkSerializer::ConvertSpkiFromDerToJwk(spki, &public_key_jwk));
  70   EXPECT_TRUE(public_key_jwk.empty());
  71
  72   // Test the result of a "normal" point on this curve.
  73   spki.set(reinterpret_cast<const char*>(kSpkiEc), sizeof(kSpkiEc));
  74   EXPECT_TRUE(JwkSerializer::ConvertSpkiFromDerToJwk(spki, &public_key_jwk));
  75
  76   std::string string_value;
  77   EXPECT_TRUE(public_key_jwk.GetString("alg", &string_value));
  78   EXPECT_STREQ("EC", string_value.c_str());
  79   EXPECT_TRUE(public_key_jwk.GetString("crv", &string_value));
  80   EXPECT_STREQ("P-256", string_value.c_str());
  81
  82   EXPECT_TRUE(public_key_jwk.GetString("x", &string_value));
  83   std::string decoded_coordinate;
  84   EXPECT_TRUE(base::Base64Decode(string_value, &decoded_coordinate));
  85   EXPECT_EQ(kEcCoordinateSize, decoded_coordinate.size());
  86   EXPECT_EQ(0,
  87             memcmp(decoded_coordinate.data(),
  88                    kSpkiEc + sizeof(kP256SpkiPrefix),
  89                    kEcCoordinateSize));
  90
  91   EXPECT_TRUE(public_key_jwk.GetString("y", &string_value));
  92   EXPECT_TRUE(base::Base64Decode(string_value, &decoded_coordinate));
  93   EXPECT_EQ(kEcCoordinateSize, decoded_coordinate.size());
  94   EXPECT_EQ(0,
  95             memcmp(decoded_coordinate.data(),
  96                   kSpkiEc + sizeof(kP256SpkiPrefix) + kEcCoordinateSize,
  97                   kEcCoordinateSize));
  98
  99   // Test the result of a corner case: leading 0s in the x, y coordinates are
 100   // not trimmed, but the point is fixed-length encoded.
 101   spki.set(reinterpret_cast<const char*>(kSpkiEcWithZeroXY),
 102            sizeof(kSpkiEcWithZeroXY));
 103   EXPECT_TRUE(JwkSerializer::ConvertSpkiFromDerToJwk(spki, &public_key_jwk));
 104
 105   EXPECT_TRUE(public_key_jwk.GetString("alg", &string_value));
 106   EXPECT_STREQ("EC", string_value.c_str());
 107   EXPECT_TRUE(public_key_jwk.GetString("crv", &string_value));
 108   EXPECT_STREQ("P-256", string_value.c_str());
 109
 110   EXPECT_TRUE(public_key_jwk.GetString("x", &string_value));
 111   EXPECT_TRUE(base::Base64Decode(string_value, &decoded_coordinate));
 112   EXPECT_EQ(kEcCoordinateSize, decoded_coordinate.size());
 113   EXPECT_EQ(0,
 114             memcmp(decoded_coordinate.data(),
 115                    kSpkiEcWithZeroXY + sizeof(kP256SpkiPrefix),
 116                    kEcCoordinateSize));
 117
 118   EXPECT_TRUE(public_key_jwk.GetString("y", &string_value));
 119   EXPECT_TRUE(base::Base64Decode(string_value, &decoded_coordinate));
 120   EXPECT_EQ(kEcCoordinateSize, decoded_coordinate.size());
 121   EXPECT_EQ(0,
 122       memcmp(decoded_coordinate.data(),
 123              kSpkiEcWithZeroXY + sizeof(kP256SpkiPrefix) + kEcCoordinateSize,
 124              kEcCoordinateSize));
 125 }
 126
 127 #else
 128
 129 // For OpenSSL, JwkSerializer::ConvertSpkiFromDerToJwk() is not yet implemented
 130 // and should return false.  This unit test ensures that a stub implementation
 131 // is present.
 132 TEST(JwkSerializerOpenSSLTest, ConvertSpkiFromDerToJwkNotImplemented) {
 133   base::StringPiece spki;
 134   base::DictionaryValue public_key_jwk;
 135
 136   // The empty SPKI is trivially non-convertible...
 137   EXPECT_FALSE(JwkSerializer::ConvertSpkiFromDerToJwk(spki, &public_key_jwk));
 138   EXPECT_TRUE(public_key_jwk.empty());
 139   // but even a valid SPKI is non-convertible via the stub OpenSSL
 140   // implementation.
 141   spki.set(reinterpret_cast<const char*>(kSpkiEc), sizeof(kSpkiEc));
 142   EXPECT_FALSE(JwkSerializer::ConvertSpkiFromDerToJwk(spki, &public_key_jwk));
 143   EXPECT_TRUE(public_key_jwk.empty());
 144 }
 145
 146 #endif  // !defined(USE_OPENSSL)
 147
 148 }  // namespace net