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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/webcrypto_util.h" | 5 #include "components/webcrypto/webcrypto_util.h" |
| 6 | 6 |
| 7 #include "base/logging.h" | 7 #include "base/logging.h" |
| 8 #include "base/numerics/safe_math.h" | 8 #include "base/numerics/safe_math.h" |
| 9 #include "content/child/webcrypto/status.h" | 9 #include "components/webcrypto/status.h" |
| 10 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h" | 10 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h" |
| 11 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h" | 11 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h" |
| 12 #include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h" | 12 #include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h" |
| 13 | 13 |
| 14 namespace content { | |
| 15 | |
| 16 namespace webcrypto { | 14 namespace webcrypto { |
| 17 | 15 |
| 18 namespace { | 16 namespace { |
| 19 | 17 |
| 20 // Converts a (big-endian) WebCrypto BigInteger, with or without leading zeros, | 18 // Converts a (big-endian) WebCrypto BigInteger, with or without leading zeros, |
| 21 // to unsigned int. | 19 // to unsigned int. |
| 22 bool BigIntegerToUint(const uint8_t* data, | 20 bool BigIntegerToUint(const uint8_t* data, |
| 23 unsigned int data_size, | 21 unsigned int data_size, |
| 24 unsigned int* result) { | 22 unsigned int* result) { |
| 25 if (data_size == 0) | 23 if (data_size == 0) |
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| 235 blink::WebCryptoKeyUsageMask usages) { | 233 blink::WebCryptoKeyUsageMask usages) { |
| 236 switch (format) { | 234 switch (format) { |
| 237 case blink::WebCryptoKeyFormatSpki: | 235 case blink::WebCryptoKeyFormatSpki: |
| 238 return CheckKeyCreationUsages(all_public_key_usages, usages, true); | 236 return CheckKeyCreationUsages(all_public_key_usages, usages, true); |
| 239 case blink::WebCryptoKeyFormatPkcs8: | 237 case blink::WebCryptoKeyFormatPkcs8: |
| 240 return CheckKeyCreationUsages(all_private_key_usages, usages, false); | 238 return CheckKeyCreationUsages(all_private_key_usages, usages, false); |
| 241 case blink::WebCryptoKeyFormatJwk: { | 239 case blink::WebCryptoKeyFormatJwk: { |
| 242 // The JWK could represent either a public key or private key. The usages | 240 // The JWK could represent either a public key or private key. The usages |
| 243 // must make sense for one of the two. The usages will be checked again by | 241 // must make sense for one of the two. The usages will be checked again by |
| 244 // ImportKeyJwk() once the key type has been determined. | 242 // ImportKeyJwk() once the key type has been determined. |
| 245 if (CheckKeyCreationUsages( | 243 if (CheckKeyCreationUsages(all_public_key_usages, usages, true) |
| 246 all_public_key_usages, usages, true).IsError() && | 244 .IsError() && |
| 247 CheckKeyCreationUsages( | 245 CheckKeyCreationUsages(all_private_key_usages, usages, false) |
| 248 all_private_key_usages, usages, false).IsError()) { | 246 .IsError()) { |
| 249 return Status::ErrorCreateKeyBadUsages(); | 247 return Status::ErrorCreateKeyBadUsages(); |
| 250 } | 248 } |
| 251 return Status::Success(); | 249 return Status::Success(); |
| 252 } | 250 } |
| 253 default: | 251 default: |
| 254 return Status::ErrorUnsupportedImportKeyFormat(); | 252 return Status::ErrorUnsupportedImportKeyFormat(); |
| 255 } | 253 } |
| 256 } | 254 } |
| 257 | 255 |
| 258 void TruncateToBitLength(size_t length_bits, std::vector<uint8_t>* bytes) { | 256 void TruncateToBitLength(size_t length_bits, std::vector<uint8_t>* bytes) { |
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| 321 *public_usages = combined_usages & all_public_usages; | 319 *public_usages = combined_usages & all_public_usages; |
| 322 *private_usages = combined_usages & all_private_usages; | 320 *private_usages = combined_usages & all_private_usages; |
| 323 | 321 |
| 324 if (*private_usages == 0) | 322 if (*private_usages == 0) |
| 325 return Status::ErrorCreateKeyEmptyUsages(); | 323 return Status::ErrorCreateKeyEmptyUsages(); |
| 326 | 324 |
| 327 return Status::Success(); | 325 return Status::Success(); |
| 328 } | 326 } |
| 329 | 327 |
| 330 } // namespace webcrypto | 328 } // namespace webcrypto |
| 331 | |
| 332 } // namespace content | |
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