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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/child/webcrypto/shared_crypto.h" | 5 #include "content/child/webcrypto/shared_crypto.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 #include <string> | 8 #include <string> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
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2621 EXPECT_EQ(true, unwrapped_key.extractable()); | 2621 EXPECT_EQ(true, unwrapped_key.extractable()); |
2622 EXPECT_EQ(blink::WebCryptoKeyUsageVerify, unwrapped_key.usages()); | 2622 EXPECT_EQ(blink::WebCryptoKeyUsageVerify, unwrapped_key.usages()); |
2623 | 2623 |
2624 // Export the new key's raw data and compare to the known original. | 2624 // Export the new key's raw data and compare to the known original. |
2625 blink::WebArrayBuffer raw_key; | 2625 blink::WebArrayBuffer raw_key; |
2626 EXPECT_STATUS_SUCCESS( | 2626 EXPECT_STATUS_SUCCESS( |
2627 ExportKey(blink::WebCryptoKeyFormatRaw, unwrapped_key, &raw_key)); | 2627 ExportKey(blink::WebCryptoKeyFormatRaw, unwrapped_key, &raw_key)); |
2628 EXPECT_TRUE(ArrayBufferMatches(key_data, raw_key)); | 2628 EXPECT_TRUE(ArrayBufferMatches(key_data, raw_key)); |
2629 } | 2629 } |
2630 | 2630 |
2631 TEST_F(SharedCryptoTest, MAYBE(AesKwJwkSymkeyUnwrapErrors)) { | |
2632 // Unwrap data that can be successfully decrypted, but contains an error in | |
2633 // the plaintext JWK, and ensure that a generic error is returned instead of | |
2634 // some other more specific error, to show that information about the | |
2635 // plaintext JWK inside the encrypted data is not leaked. | |
2636 // Specifically, wrapped_key_data below is an AES-KW encrypted version of the | |
2637 // plaintext JWK | |
2638 // { | |
2639 // "alg":"HS256", | |
2640 // "ext":true, | |
2641 // "k":"AAECAwQFBgcICQoLDA0ODwABAgMEBQYHCAkKCwwNDg8", | |
2642 // "key_ops":["verify"], | |
2643 // "kty":"foo" <-- Invalid kty value | |
2644 // } | |
2645 // Recall that unwrapKey = decrypt followed by import. The wrapped_key_data | |
2646 // will decrypt successfully, but the import step will fail because of the bad | |
2647 // kty value. But unlike the standalone ImportKey() method which returns | |
2648 // ErrorJwkUnrecognizedKty in this case, the error returned must be just | |
2649 // Error::Status(). | |
2650 // Note that it is sufficient to consider just one JWK import failure mode | |
2651 // here; others are validated in the ImportJwkFailures Test. | |
2652 const std::vector<uint8> wrapped_key_data = HexStringToBytes( | |
2653 "8d5ad45f5be6195a7a5944f0cf521bbae255daea140d4712985bb63ca1de1a318fbc49ff" | |
2654 "307bd91bfafd7e9ea2057a2ddabb42ba94e319465972d165e5cc42785ad5cfa36159d5cc" | |
2655 "50084133eae85a22bf8f7cb35f3c07b7c06480dec745d9ce4d4bfce45a6cbc2d39263ab7" | |
2656 "073fc346724841f872f7148d"); | |
2657 const std::vector<uint8> wrapping_key_data = | |
2658 HexStringToBytes("000102030405060708090A0B0C0D0E0F"); | |
2659 const blink::WebCryptoAlgorithm wrapping_algorithm = | |
2660 webcrypto::CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw); | |
2661 | |
2662 // Import the wrapping key. | |
2663 blink::WebCryptoKey wrapping_key = ImportSecretKeyFromRaw( | |
2664 wrapping_key_data, wrapping_algorithm, blink::WebCryptoKeyUsageUnwrapKey); | |
2665 | |
2666 // Unwrap and ensure a generic error is received. | |
2667 blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull(); | |
2668 EXPECT_STATUS(Status::Error(), | |
2669 UnwrapKey(blink::WebCryptoKeyFormatJwk, | |
2670 CryptoData(wrapped_key_data), | |
2671 wrapping_key, | |
2672 wrapping_algorithm, | |
2673 blink::WebCryptoAlgorithm::createNull(), | |
2674 true, | |
2675 blink::WebCryptoKeyUsageVerify, | |
2676 &unwrapped_key)); | |
2677 | |
2678 // FIXME(padolph): The check above can fail if the AES-KW decryption step | |
2679 // failed, which masks the test result desired here. For now we have to just | |
2680 // trust the result because I say so. | |
2681 // Once RSA-ES unwrapping is implemented, port this test to use that wrapping | |
2682 // algorithm instead of AES-KW. Unlike AES-KW, RSA-ES supports both the | |
2683 // decrypt and unwrapKey usages, so we can validate successful decryption of | |
2684 // wrapped_key_data prior to seeing the unwrapKey (import) failure. | |
2685 } | |
2686 | |
2687 // TODO(eroman): | 2631 // TODO(eroman): |
2688 // * Test decryption when the tag length exceeds input size | 2632 // * Test decryption when the tag length exceeds input size |
2689 // * Test decryption with empty input | 2633 // * Test decryption with empty input |
2690 // * Test decryption with tag length of 0. | 2634 // * Test decryption with tag length of 0. |
2691 TEST_F(SharedCryptoTest, MAYBE(AesGcmSampleSets)) { | 2635 TEST_F(SharedCryptoTest, MAYBE(AesGcmSampleSets)) { |
2692 // Some Linux test runners may not have a new enough version of NSS. | 2636 // Some Linux test runners may not have a new enough version of NSS. |
2693 if (!SupportsAesGcm()) { | 2637 if (!SupportsAesGcm()) { |
2694 LOG(WARNING) << "AES GCM not supported, skipping tests"; | 2638 LOG(WARNING) << "AES GCM not supported, skipping tests"; |
2695 return; | 2639 return; |
2696 } | 2640 } |
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2971 UnwrapKey(blink::WebCryptoKeyFormatRaw, | 2915 UnwrapKey(blink::WebCryptoKeyFormatRaw, |
2972 CryptoData(big_data), | 2916 CryptoData(big_data), |
2973 private_key, | 2917 private_key, |
2974 wrapping_algorithm, | 2918 wrapping_algorithm, |
2975 key_algorithm, | 2919 key_algorithm, |
2976 true, | 2920 true, |
2977 blink::WebCryptoKeyUsageSign, | 2921 blink::WebCryptoKeyUsageSign, |
2978 &unwrapped_key)); | 2922 &unwrapped_key)); |
2979 } | 2923 } |
2980 | 2924 |
2925 TEST_F(SharedCryptoTest, MAYBE(RsaEsJwkSymkeyUnwrapKnownAnswer)) { | |
2926 // The following data lists a known 128-bit AES-CBC key, then a JWK | |
2927 // representation of this key that was encrypted ("wrapped") using | |
2928 // RSAES-PKCS1-v1_5 and kPublicKeySpkiDerHex as the wrapping key. | |
2929 // For reference, the intermediate clear JWK is | |
2930 // {"alg":"A128CBC","ext":true,"k":<b64url>,"key_ops":["encrypt"],"kty":"oct"} | |
2931 const std::vector<uint8> key_data = | |
2932 HexStringToBytes("8f56a26e7e8b77dca15ed54339724bf5"); | |
2933 const std::vector<uint8> wrapped_key_data = HexStringToBytes( | |
2934 "9debcabd9c731d6a779622dbef38635419c409b3077af67b3cf0601b2da7054f2ec26156" | |
2935 "06bb764e4986f45dd09ce660432a7abbac48b5249924f12dea52275b6d67d8b8a2f63525" | |
2936 "fbbf67d61244c1afa9e30857b87b7a48cdc0b3196dc1477738cbf9e42ea65d5e0edc3b05" | |
2937 "afafadc7d7400e26a51270d251040d51ce46cecc"); | |
2938 const blink::WebCryptoAlgorithm wrapping_algorithm = | |
2939 webcrypto::CreateAlgorithm(blink::WebCryptoAlgorithmIdRsaEsPkcs1v1_5); | |
2940 | |
2941 // Import the private wrapping key. | |
2942 blink::WebCryptoKey private_wrapping_key = blink::WebCryptoKey::createNull(); | |
2943 ASSERT_STATUS_SUCCESS(ImportKey( | |
2944 blink::WebCryptoKeyFormatPkcs8, | |
2945 CryptoData(HexStringToBytes(kPrivateKeyPkcs8DerHex)), | |
2946 wrapping_algorithm, | |
2947 false, | |
2948 blink::WebCryptoKeyUsageDecrypt | blink::WebCryptoKeyUsageUnwrapKey, | |
2949 &private_wrapping_key)); | |
2950 | |
2951 // Unwrap the key. | |
2952 blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull(); | |
2953 EXPECT_STATUS_SUCCESS( | |
2954 UnwrapKey(blink::WebCryptoKeyFormatJwk, | |
2955 CryptoData(wrapped_key_data), | |
2956 private_wrapping_key, | |
2957 wrapping_algorithm, | |
2958 CreateAesCbcAlgorithm(std::vector<uint8>(0, 16)), | |
2959 true, | |
2960 blink::WebCryptoKeyUsageEncrypt, | |
2961 &unwrapped_key)); | |
2962 EXPECT_FALSE(unwrapped_key.isNull()); | |
2963 EXPECT_TRUE(unwrapped_key.handle()); | |
2964 EXPECT_EQ(blink::WebCryptoKeyTypeSecret, unwrapped_key.type()); | |
2965 EXPECT_EQ(blink::WebCryptoAlgorithmIdAesCbc, unwrapped_key.algorithm().id()); | |
2966 EXPECT_EQ(true, unwrapped_key.extractable()); | |
2967 EXPECT_EQ(blink::WebCryptoKeyUsageEncrypt, unwrapped_key.usages()); | |
2968 | |
2969 // Export the unwrapped key and compare to the original. | |
2970 blink::WebArrayBuffer raw_key; | |
2971 EXPECT_STATUS_SUCCESS( | |
2972 ExportKey(blink::WebCryptoKeyFormatRaw, unwrapped_key, &raw_key)); | |
2973 EXPECT_TRUE(ArrayBufferMatches(key_data, raw_key)); | |
2974 } | |
2975 | |
2976 TEST_F(SharedCryptoTest, MAYBE(RsaEsJwkSymkeyWrapUnwrapRoundTrip)) { | |
2977 // Generate the symkey to be wrapped (256-bit AES-CBC key). | |
2978 const blink::WebCryptoAlgorithm algorithm = CreateAesCbcKeyGenAlgorithm(256); | |
eroman
2014/03/19 04:04:00
Call this gen_algorithm instead. And then at the c
padolph
2014/03/19 18:29:59
Done.
| |
2979 blink::WebCryptoKey key_to_wrap = blink::WebCryptoKey::createNull(); | |
2980 ASSERT_STATUS_SUCCESS(GenerateSecretKey( | |
2981 algorithm, true, blink::WebCryptoKeyUsageEncrypt, &key_to_wrap)); | |
2982 | |
2983 // Import the wrapping key pair. | |
2984 const blink::WebCryptoAlgorithm wrapping_algorithm = | |
2985 CreateAlgorithm(blink::WebCryptoAlgorithmIdRsaEsPkcs1v1_5); | |
2986 blink::WebCryptoKey public_wrapping_key = blink::WebCryptoKey::createNull(); | |
2987 blink::WebCryptoKey private_wrapping_key = blink::WebCryptoKey::createNull(); | |
2988 ImportRsaKeyPair( | |
2989 HexStringToBytes(kPublicKeySpkiDerHex), | |
2990 HexStringToBytes(kPrivateKeyPkcs8DerHex), | |
2991 wrapping_algorithm, | |
2992 false, | |
2993 blink::WebCryptoKeyUsageWrapKey | blink::WebCryptoKeyUsageUnwrapKey, | |
2994 &public_wrapping_key, | |
2995 &private_wrapping_key); | |
2996 | |
2997 // Wrap the symkey in JWK format, using the public wrapping key. | |
2998 blink::WebArrayBuffer wrapped_data; | |
2999 ASSERT_STATUS_SUCCESS(WrapKey(blink::WebCryptoKeyFormatJwk, | |
3000 public_wrapping_key, | |
3001 key_to_wrap, | |
3002 wrapping_algorithm, | |
3003 &wrapped_data)); | |
3004 | |
3005 // Unwrap the key using the private wrapping key. | |
3006 blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull(); | |
3007 ASSERT_STATUS_SUCCESS(UnwrapKey(blink::WebCryptoKeyFormatJwk, | |
3008 CryptoData(wrapped_data), | |
3009 private_wrapping_key, | |
3010 wrapping_algorithm, | |
3011 algorithm, | |
3012 true, | |
3013 blink::WebCryptoKeyUsageEncrypt, | |
3014 &unwrapped_key)); | |
3015 | |
3016 // Export the original symkey and the unwrapped key and compare. | |
3017 blink::WebArrayBuffer raw_key1, raw_key2; | |
3018 EXPECT_STATUS_SUCCESS( | |
3019 ExportKey(blink::WebCryptoKeyFormatRaw, key_to_wrap, &raw_key1)); | |
3020 EXPECT_STATUS_SUCCESS( | |
3021 ExportKey(blink::WebCryptoKeyFormatRaw, unwrapped_key, &raw_key2)); | |
3022 EXPECT_TRUE(ArrayBuffersEqual(raw_key1, raw_key2)); | |
3023 } | |
3024 | |
3025 TEST_F(SharedCryptoTest, MAYBE(RsaEsJwkSymkeyWrapUnwrapErrors)) { | |
3026 // Unwrap JWK-formatted data that can be successfully decrypted, but contains | |
3027 // an error in the plaintext JWK so it cannot be subsequently imported, and | |
3028 // ensure that a generic error is returned instead of some other more specific | |
3029 // error. This shows that information about the plaintext JWK inside the | |
3030 // encrypted data is not leaked. | |
3031 // Note that it is sufficient to consider just one JWK import failure mode | |
3032 // here; others are validated in the ImportJwkFailures Test. The specific | |
3033 // error in the cleartext data below is kty = "foo", which is an invalid kty | |
3034 // value. | |
3035 const std::string cleartext = | |
3036 "{\"alg\":\"A128CBC\",\"ext\":true,\"k\":" | |
3037 "\"j1aibn6Ld9yhXtVDOXJL9Q\",\"key_ops\":[\"encrypt\"],\"kty\":\"foo\"}"; | |
3038 // ciphertext is the cleartext above encrypted with kPublicKeySpkiDerHex, and | |
3039 // can be decrypted with kPrivateKeyPkcs8DerHex | |
3040 const std::vector<uint8> ciphertext = HexStringToBytes( | |
3041 "93bc7bb2ca8502fcf3224e19b12ba455ac32d01695611022c76d3dbdd797c044de047d44" | |
3042 "6c5ed5de5b8f79147ffe1df8da9c894b58881b238d39bd24cecd5c1a98a7c0b07354aee6" | |
3043 "24791b2d549b7ecf1219c49513a1bcbb0fac5c6b59d350b564c44dc3678dadf84b4ea3d1" | |
3044 "32e576e88f8d4a2d27c173e033a97bbda7e47bb9"); | |
3045 | |
3046 // Import the private decryption key. | |
3047 const blink::WebCryptoAlgorithm algorithm = | |
3048 CreateAlgorithm(blink::WebCryptoAlgorithmIdRsaEsPkcs1v1_5); | |
3049 blink::WebCryptoKey private_decryption_key = | |
3050 blink::WebCryptoKey::createNull(); | |
3051 ASSERT_STATUS_SUCCESS( | |
3052 ImportKey(blink::WebCryptoKeyFormatPkcs8, | |
3053 CryptoData(HexStringToBytes(kPrivateKeyPkcs8DerHex)), | |
3054 algorithm, | |
3055 false, | |
3056 blink::WebCryptoKeyUsageDecrypt, | |
3057 &private_decryption_key)); | |
3058 | |
3059 // Decrypt the ciphertext and validate the result, to prove that decryption is | |
3060 // successful. | |
3061 blink::WebArrayBuffer decrypted_data; | |
3062 ASSERT_STATUS_SUCCESS(Decrypt(algorithm, | |
3063 private_decryption_key, | |
3064 CryptoData(ciphertext), | |
3065 &decrypted_data)); | |
3066 const std::string decrypted(static_cast<const char*>(decrypted_data.data()), | |
3067 decrypted_data.byteLength()); | |
3068 EXPECT_EQ(cleartext, decrypted); | |
3069 | |
3070 // Import the private wrapping key. Note this is the same underlying keying | |
3071 // material used for private_decryption_key above. The only difference is that | |
3072 // it has unwrap rather than decrypt usage. | |
3073 blink::WebCryptoKey private_wrapping_key = blink::WebCryptoKey::createNull(); | |
3074 ASSERT_STATUS_SUCCESS( | |
3075 ImportKey(blink::WebCryptoKeyFormatPkcs8, | |
3076 CryptoData(HexStringToBytes(kPrivateKeyPkcs8DerHex)), | |
3077 algorithm, | |
3078 false, | |
3079 blink::WebCryptoKeyUsageUnwrapKey, | |
3080 &private_wrapping_key)); | |
3081 | |
3082 // Treat the ciphertext as a wrapped key and try to unwrap it. Ensure a | |
3083 // generic error is received. | |
3084 blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull(); | |
3085 EXPECT_STATUS(Status::Error(), | |
3086 UnwrapKey(blink::WebCryptoKeyFormatJwk, | |
3087 CryptoData(ciphertext), | |
3088 private_wrapping_key, | |
3089 algorithm, | |
3090 CreateAesCbcAlgorithm(std::vector<uint8>(0, 16)), | |
3091 true, | |
3092 blink::WebCryptoKeyUsageEncrypt, | |
3093 &unwrapped_key)); | |
3094 } | |
3095 | |
2981 } // namespace webcrypto | 3096 } // namespace webcrypto |
2982 | 3097 |
2983 } // namespace content | 3098 } // namespace content |
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