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 a leading 0.
  48 static const unsigned char kSpkiEcWithLeadingZero[] = {
  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, 0x8e, 0xd5, 0x49, 0x51, 0xad, 0x7d, 0xd3,
  54     0x3a, 0x59, 0x86, 0xd1, 0x2c, 0xba, 0x05, 0xd3,
  55     0xa6, 0x3c, 0x5d, 0x6d, 0x28, 0xde, 0x8f, 0xdd,
  56     0xa5, 0x3d, 0x30, 0x18, 0x05, 0x86, 0x76, 0x9c,
  57     0x7c, 0xa7, 0xba, 0x58, 0xea, 0x1a, 0x84, 0x19,
  58     0x29, 0x0a, 0x15, 0x30, 0x7d, 0x6b, 0x00, 0x41,
  59     0x64, 0x56, 0x84, 0x19, 0x54, 0x3e, 0x26, 0x13,
  60     0xc9, 0x1e, 0x31, 0x89, 0xe2, 0x62, 0xcb, 0x3f
  61 };
  62
  63 TEST(JwkSerializerTest, ConvertSpkiFromDerToJwkEc) {
  64   base::StringPiece spki;
  65   base::DictionaryValue public_key_jwk;
  66
  67   EXPECT_FALSE(JwkSerializer::ConvertSpkiFromDerToJwk(spki, &public_key_jwk));
  68   EXPECT_TRUE(public_key_jwk.empty());
  69
  70   // Test the result of a "normal" point on this curve.
  71   spki.set(reinterpret_cast<const char*>(kSpkiEc), sizeof(kSpkiEc));
  72   EXPECT_TRUE(JwkSerializer::ConvertSpkiFromDerToJwk(spki, &public_key_jwk));
  73
  74   std::string string_value;
  75   EXPECT_TRUE(public_key_jwk.GetString("kty", &string_value));
  76   EXPECT_STREQ("EC", string_value.c_str());
  77   EXPECT_TRUE(public_key_jwk.GetString("crv", &string_value));
  78   EXPECT_STREQ("P-256", string_value.c_str());
  79
  80   EXPECT_TRUE(public_key_jwk.GetString("x", &string_value));
  81   std::string decoded_coordinate;
  82   EXPECT_TRUE(base::Base64Decode(string_value, &decoded_coordinate));
  83   EXPECT_EQ(kEcCoordinateSize, decoded_coordinate.size());
  84   EXPECT_EQ(0,
  85             memcmp(decoded_coordinate.data(),
  86                    kSpkiEc + sizeof(kP256SpkiPrefix),
  87                    kEcCoordinateSize));
  88
  89   EXPECT_TRUE(public_key_jwk.GetString("y", &string_value));
  90   EXPECT_TRUE(base::Base64Decode(string_value, &decoded_coordinate));
  91   EXPECT_EQ(kEcCoordinateSize, decoded_coordinate.size());
  92   EXPECT_EQ(0,
  93             memcmp(decoded_coordinate.data(),
  94                   kSpkiEc + sizeof(kP256SpkiPrefix) + kEcCoordinateSize,
  95                   kEcCoordinateSize));
  96
  97   // Test the result of a corner case: leading 0s in the x, y coordinates are
  98   // not trimmed, but the point is fixed-length encoded.
  99   spki.set(reinterpret_cast<const char*>(kSpkiEcWithLeadingZero),
 100            sizeof(kSpkiEcWithLeadingZero));
 101   EXPECT_TRUE(JwkSerializer::ConvertSpkiFromDerToJwk(spki, &public_key_jwk));
 102
 103   EXPECT_TRUE(public_key_jwk.GetString("kty", &string_value));
 104   EXPECT_STREQ("EC", string_value.c_str());
 105   EXPECT_TRUE(public_key_jwk.GetString("crv", &string_value));
 106   EXPECT_STREQ("P-256", string_value.c_str());
 107
 108   EXPECT_TRUE(public_key_jwk.GetString("x", &string_value));
 109   EXPECT_TRUE(base::Base64Decode(string_value, &decoded_coordinate));
 110   EXPECT_EQ(kEcCoordinateSize, decoded_coordinate.size());
 111   EXPECT_EQ(0,
 112             memcmp(decoded_coordinate.data(),
 113                    kSpkiEcWithLeadingZero + sizeof(kP256SpkiPrefix),
 114                    kEcCoordinateSize));
 115
 116   EXPECT_TRUE(public_key_jwk.GetString("y", &string_value));
 117   EXPECT_TRUE(base::Base64Decode(string_value, &decoded_coordinate));
 118   EXPECT_EQ(kEcCoordinateSize, decoded_coordinate.size());
 119   EXPECT_EQ(0, memcmp(
 120       decoded_coordinate.data(),
 121       kSpkiEcWithLeadingZero + sizeof(kP256SpkiPrefix) + kEcCoordinateSize,
 122       kEcCoordinateSize));
 123 }
 124
 125 }  // namespace net