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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include <openssl/evp.h> | |
| 6 | |
| 7 #include "base/stl_util.h" | |
| 8 #include "components/webcrypto/crypto_data.h" | |
| 9 #include "components/webcrypto/openssl/key_openssl.h" | |
| 10 #include "components/webcrypto/openssl/rsa_hashed_algorithm_openssl.h" | |
| 11 #include "components/webcrypto/openssl/util_openssl.h" | |
| 12 #include "components/webcrypto/status.h" | |
| 13 #include "crypto/openssl_util.h" | |
| 14 #include "crypto/scoped_openssl_types.h" | |
| 15 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h" | |
| 16 #include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h" | |
| 17 | |
| 18 namespace webcrypto { | |
| 19 | |
| 20 namespace { | |
| 21 | |
| 22 typedef int (*InitFunc)(EVP_PKEY_CTX* ctx); | |
| 23 typedef int (*EncryptDecryptFunc)(EVP_PKEY_CTX* ctx, | |
| 24 unsigned char* out, | |
| 25 size_t* outlen, | |
| 26 const unsigned char* in, | |
| 27 size_t inlen); | |
| 28 | |
| 29 // Helper for doing either RSA-OAEP encryption or decryption. | |
| 30 // | |
| 31 // To encrypt call with: | |
| 32 // init_func=EVP_PKEY_encrypt_init, encrypt_decrypt_func=EVP_PKEY_encrypt | |
| 33 // | |
| 34 // To decrypt call with: | |
| 35 // init_func=EVP_PKEY_decrypt_init, encrypt_decrypt_func=EVP_PKEY_decrypt | |
| 36 Status CommonEncryptDecrypt(InitFunc init_func, | |
| 37 EncryptDecryptFunc encrypt_decrypt_func, | |
| 38 const blink::WebCryptoAlgorithm& algorithm, | |
| 39 const blink::WebCryptoKey& key, | |
| 40 const CryptoData& data, | |
| 41 std::vector<uint8_t>* buffer) { | |
| 42 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 43 | |
| 44 EVP_PKEY* pkey = AsymKeyOpenSsl::Cast(key)->key(); | |
| 45 const EVP_MD* digest = | |
| 46 GetDigest(key.algorithm().rsaHashedParams()->hash().id()); | |
| 47 if (!digest) | |
| 48 return Status::ErrorUnsupported(); | |
| 49 | |
| 50 crypto::ScopedEVP_PKEY_CTX ctx(EVP_PKEY_CTX_new(pkey, NULL)); | |
| 51 | |
| 52 if (!init_func(ctx.get()) || | |
| 53 1 != EVP_PKEY_CTX_set_rsa_padding(ctx.get(), RSA_PKCS1_OAEP_PADDING) || | |
| 54 1 != EVP_PKEY_CTX_set_rsa_oaep_md(ctx.get(), digest) || | |
| 55 1 != EVP_PKEY_CTX_set_rsa_mgf1_md(ctx.get(), digest)) { | |
| 56 return Status::OperationError(); | |
| 57 } | |
| 58 | |
| 59 const blink::WebVector<uint8_t>& label = | |
| 60 algorithm.rsaOaepParams()->optionalLabel(); | |
| 61 | |
| 62 if (label.size()) { | |
| 63 // Make a copy of the label, since the ctx takes ownership of it when | |
| 64 // calling set0_rsa_oaep_label(). | |
| 65 crypto::ScopedOpenSSLBytes label_copy; | |
| 66 label_copy.reset(static_cast<uint8_t*>(OPENSSL_malloc(label.size()))); | |
| 67 memcpy(label_copy.get(), label.data(), label.size()); | |
| 68 | |
| 69 if (1 != EVP_PKEY_CTX_set0_rsa_oaep_label(ctx.get(), label_copy.release(), | |
| 70 label.size())) { | |
| 71 return Status::OperationError(); | |
| 72 } | |
| 73 } | |
| 74 | |
| 75 // Determine the maximum length of the output. | |
| 76 size_t outlen = 0; | |
| 77 if (!encrypt_decrypt_func(ctx.get(), NULL, &outlen, data.bytes(), | |
| 78 data.byte_length())) { | |
| 79 return Status::OperationError(); | |
| 80 } | |
| 81 buffer->resize(outlen); | |
| 82 | |
| 83 // Do the actual encryption/decryption. | |
| 84 if (!encrypt_decrypt_func(ctx.get(), vector_as_array(buffer), &outlen, | |
| 85 data.bytes(), data.byte_length())) { | |
| 86 return Status::OperationError(); | |
| 87 } | |
| 88 buffer->resize(outlen); | |
| 89 | |
| 90 return Status::Success(); | |
| 91 } | |
| 92 | |
| 93 class RsaOaepImplementation : public RsaHashedAlgorithm { | |
| 94 public: | |
| 95 RsaOaepImplementation() | |
| 96 : RsaHashedAlgorithm( | |
| 97 blink::WebCryptoKeyUsageEncrypt | blink::WebCryptoKeyUsageWrapKey, | |
| 98 blink::WebCryptoKeyUsageDecrypt | | |
| 99 blink::WebCryptoKeyUsageUnwrapKey) {} | |
| 100 | |
| 101 const char* GetJwkAlgorithm( | |
| 102 const blink::WebCryptoAlgorithmId hash) const override { | |
| 103 switch (hash) { | |
| 104 case blink::WebCryptoAlgorithmIdSha1: | |
| 105 return "RSA-OAEP"; | |
| 106 case blink::WebCryptoAlgorithmIdSha256: | |
| 107 return "RSA-OAEP-256"; | |
| 108 case blink::WebCryptoAlgorithmIdSha384: | |
| 109 return "RSA-OAEP-384"; | |
| 110 case blink::WebCryptoAlgorithmIdSha512: | |
| 111 return "RSA-OAEP-512"; | |
| 112 default: | |
| 113 return NULL; | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 Status Encrypt(const blink::WebCryptoAlgorithm& algorithm, | |
| 118 const blink::WebCryptoKey& key, | |
| 119 const CryptoData& data, | |
| 120 std::vector<uint8_t>* buffer) const override { | |
| 121 if (key.type() != blink::WebCryptoKeyTypePublic) | |
| 122 return Status::ErrorUnexpectedKeyType(); | |
| 123 | |
| 124 return CommonEncryptDecrypt(EVP_PKEY_encrypt_init, EVP_PKEY_encrypt, | |
| 125 algorithm, key, data, buffer); | |
| 126 } | |
| 127 | |
| 128 Status Decrypt(const blink::WebCryptoAlgorithm& algorithm, | |
| 129 const blink::WebCryptoKey& key, | |
| 130 const CryptoData& data, | |
| 131 std::vector<uint8_t>* buffer) const override { | |
| 132 if (key.type() != blink::WebCryptoKeyTypePrivate) | |
| 133 return Status::ErrorUnexpectedKeyType(); | |
| 134 | |
| 135 return CommonEncryptDecrypt(EVP_PKEY_decrypt_init, EVP_PKEY_decrypt, | |
| 136 algorithm, key, data, buffer); | |
| 137 } | |
| 138 }; | |
| 139 | |
| 140 } // namespace | |
| 141 | |
| 142 AlgorithmImplementation* CreatePlatformRsaOaepImplementation() { | |
| 143 return new RsaOaepImplementation; | |
| 144 } | |
| 145 | |
| 146 } // namespace webcrypto | |
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Chromium Code Reviews
Issue 1304063015:
[refactor] Rename the webcrypto/openssl and webcrypto/test directories. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@jwk_refactor