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 #ifndef CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_UTIL_H_ 6 #define CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_UTIL_H_ 7 8 #include <stdint.h> 9 #include <string> 10 11 #include "base/values.h" 12 #include "content/common/content_export.h" 13 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h" 14 #include "third_party/WebKit/public/platform/WebCryptoKey.h" 15 16 namespace content { 17 18 namespace webcrypto { 19 20 class Status; 21 22 // Composes a Web Crypto usage mask from an array of JWK key_ops values. 23 CONTENT_EXPORT Status GetWebCryptoUsagesFromJwkKeyOps( 24 const base::ListValue* jwk_key_ops_value, 25 blink::WebCryptoKeyUsageMask* jwk_key_ops_mask); 26 27 // Composes a JWK key_ops array from a Web Crypto usage mask. 28 base::ListValue* CreateJwkKeyOpsFromWebCryptoUsages( 29 blink::WebCryptoKeyUsageMask usage_mask); 30 31 // Creates a WebCryptoAlgorithm without any parameters. 32 CONTENT_EXPORT blink::WebCryptoAlgorithm CreateAlgorithm( 33 blink::WebCryptoAlgorithmId id); 34 35 // Creates an HMAC import algorithm whose inner hash algorithm is determined by 36 // the specified algorithm ID. It is an error to call this method with a hash 37 // algorithm that is not SHA*. 38 CONTENT_EXPORT blink::WebCryptoAlgorithm CreateHmacImportAlgorithm( 39 blink::WebCryptoAlgorithmId hash_id); 40 41 // Creates an import algorithm for RSA algorithms that take a hash. 42 // It is an error to call this with a hash_id that is not a SHA*. 43 CONTENT_EXPORT blink::WebCryptoAlgorithm CreateRsaHashedImportAlgorithm( 44 blink::WebCryptoAlgorithmId id, 45 blink::WebCryptoAlgorithmId hash_id); 46 47 // Returns true if the set bits in b make up a subset of the set bits in a. 48 bool ContainsKeyUsages(blink::WebCryptoKeyUsageMask a, 49 blink::WebCryptoKeyUsageMask b); 50 51 bool KeyUsageAllows(const blink::WebCryptoKey& key, 52 const blink::WebCryptoKeyUsage usage); 53 54 bool IsAlgorithmRsa(blink::WebCryptoAlgorithmId alg_id); 55 bool IsAlgorithmAsymmetric(blink::WebCryptoAlgorithmId alg_id); 56 57 Status GetAesGcmTagLengthInBits(const blink::WebCryptoAesGcmParams* params, 58 unsigned int* tag_length_bits); 59 60 Status GetAesKeyGenLengthInBits(const blink::WebCryptoAesKeyGenParams* params, 61 unsigned int* keylen_bits); 62 63 Status GetHmacKeyGenLengthInBits(const blink::WebCryptoHmacKeyGenParams* params, 64 unsigned int* keylen_bits); 65 66 Status VerifyAesKeyLengthForImport(unsigned int keylen_bytes); 67 68 Status CheckKeyCreationUsages(blink::WebCryptoKeyUsageMask all_possible_usages, 69 blink::WebCryptoKeyUsageMask actual_usages); 70 71 // Extracts the public exponent and modulus length from the Blink parameters. 72 // On success it is guaranteed that: 73 // * public_exponent is either 3 or 65537 74 // * modulus_length_bits is a multiple of 8 75 // * modulus_length is >= 256 76 // * modulus_length is <= 16K 77 Status GetRsaKeyGenParameters( 78 const blink::WebCryptoRsaHashedKeyGenParams* params, 79 unsigned int* public_exponent, 80 unsigned int* modulus_length_bits); 81 82 } // namespace webcrypto 83 84 } // namespace content 85 86 #endif // CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_UTIL_H_ 87
