/* * Copyright (C) 2022 Sony Interactive Entertainment Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "CryptoAlgorithmAES_CFB.h" #if ENABLE(WEB_CRYPTO) #include "CryptoAlgorithmAesCbcCfbParams.h" #include "CryptoKeyAES.h" #include "OpenSSLUtilities.h" namespace WebCore { static std::optional> cfb8(const Vector& key, const Vector& iv, const Vector& input, bool encrypt) { if (iv.size() != AES_BLOCK_SIZE) return std::nullopt; AESKey aesKey; if (!aesKey.setKey(key, AES_ENCRYPT)) return std::nullopt; // Instead of memmoving the input vector every time, we have a AES_BLOCK_SIZE * 2 length buffer // and shift the input position (shiftRegister + shift) as well as the feedback position // (shiftRegister + shift + AES_BLOCK_SIZE) until the feedback position reaches // the end of the buffer. uint8_t shiftRegister[AES_BLOCK_SIZE * 2]; memcpy(shiftRegister, iv.data(), AES_BLOCK_SIZE); size_t shift = 0; Vector output(input.size()); uint8_t encryptedBlock[AES_BLOCK_SIZE]; for (size_t i = 0; i < output.size(); i++) { AES_encrypt(shiftRegister + shift, encryptedBlock, aesKey.key()); // In the CFB8 mode the first byte (most significant 8 bits) of the encrypted block // is used as a key stream. The output stream is generated by XORing the input and the key stream. output[i] = input[i] ^ encryptedBlock[0]; // Feed back the 8 bit cipher to the shift register. The cipher stream is // "output" in the encryption mode and "input" in the decryption mode. shiftRegister[AES_BLOCK_SIZE + (shift++)] = encrypt ? output[i] : input[i]; if (shift == AES_BLOCK_SIZE) { memcpy(shiftRegister, shiftRegister + AES_BLOCK_SIZE, AES_BLOCK_SIZE); shift = 0; } } memset(encryptedBlock, 0, sizeof encryptedBlock); return output; } static std::optional> cryptEncrypt(const Vector& key, const Vector& iv, Vector&& plainText) { return cfb8(key, iv, plainText, true); } static std::optional> cryptDecrypt(const Vector& key, const Vector& iv, const Vector& cipherText) { return cfb8(key, iv, cipherText, false); } ExceptionOr> CryptoAlgorithmAES_CFB::platformEncrypt(const CryptoAlgorithmAesCbcCfbParams& parameters, const CryptoKeyAES& key, const Vector& plainText) { auto output = cryptEncrypt(key.key(), parameters.ivVector(), Vector(plainText)); if (!output) return Exception { OperationError }; return WTFMove(*output); } ExceptionOr> CryptoAlgorithmAES_CFB::platformDecrypt(const CryptoAlgorithmAesCbcCfbParams& parameters, const CryptoKeyAES& key, const Vector& cipherText) { auto output = cryptDecrypt(key.key(), parameters.ivVector(), cipherText); if (!output) return Exception { OperationError }; return WTFMove(*output); } } // namespace WebCore #endif // ENABLE(WEB_CRYPTO) Unnamed repository; edit this file 'description' to name the repository.
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2022-01-12[ci] collect statsGravatar FredKSchott 1-0/+1
2022-01-11[ci] yarn formatGravatar matthewp 1-4/+2
2022-01-11Fix: static-build with .md pages (#2363)Gravatar Matthew Phillips 6-3/+66
2022-01-11Restore accessibility check on docs site (#2362)Gravatar Jonathan Neal 2-14/+281
2022-01-11chore: remove www (#2361)Gravatar Nate Moore 87-3240/+11
2022-01-11Fix build output in static build mode (#2358)Gravatar Matthew Phillips 3-1/+16
2022-01-11Fix renderer-solid (fix #2336) (#2359)Gravatar toSayNothing 2-1/+6
2022-01-11[ci] collect statsGravatar FredKSchott 1-0/+1
2022-01-10Use smooth scrolling with reduced motion has no preference (#2355)Gravatar Jonathan Neal 1-3/+7
2022-01-10move changeset to run after build, no test required (#2341)Gravatar Fred K. Schott 1-2/+2
2022-01-10Note that Astro also supports `<Fragment>` syntax (#2354)Gravatar Zade Viggers 1-16/+18
2022-01-10smooth scroll behavior property added (#2256)Gravatar Divyamrit 1-1/+3
2022-01-10Add Astro Blog RSS feed (#2301)Gravatar Rafael Bardini 2-3/+20
2022-01-10Update Cloudflare Pages guide (#2345)Gravatar Jacob Rask 1-2/+2
2022-01-10[ci] update lockfile (#2351)Gravatar Fred K. Schott 1-116/+116
2022-01-10Update instructions for the monorepo (#2274)Gravatar Caleb Jasik 1-5/+12
2022-01-10Fix Astro Preview Pathing Issues (#2338)Gravatar Jonathan Neal 5-144/+150
2022-01-10[ci] collect statsGravatar FredKSchott 1-0/+1
2022-01-09[ci] collect statsGravatar FredKSchott 1-0/+1
2022-01-08[ci] update lockfile (#2344)Gravatar Fred K. Schott 1-33/+33
2022-01-08Fix sitemap.xml page urls (#2335)Gravatar Jonathan Neal 4-4/+8
2022-01-08[ci] collect statsGravatar FredKSchott 1-0/+1
2022-01-07Create .git-blame-ignore-revs (#2254)Gravatar Jonathan Neal 2-0/+8
2022-01-07Fix issue with plugins running twice in dev and build (#2323)Gravatar Jonathan Neal 2-2/+5
2022-01-07[ci] yarn formatGravatar matthewp 1-8/+8
2022-01-07[ci] release (#2339)astro@0.22.9Gravatar github-actions[bot] 28-39/+40
2022-01-07[ci] yarn formatGravatar matthewp 3-7/+8
2022-01-07Handle loading the Code package in the static build (#2337)Gravatar Matthew Phillips 8-4/+87
2022-01-07[ci] update lockfile (#2334)Gravatar Fred K. Schott 1-154/+154
2022-01-07[ci] yarn formatGravatar matthewp 1-8/+8
2022-01-07[ci] release (#2333)astro@0.22.8Gravatar github-actions[bot] 28-39/+40
2022-01-07[ci] collect statsGravatar FredKSchott 1-0/+1
2022-01-06[ci] yarn formatGravatar matthewp 4-54/+54
2022-01-06[ci] update lockfile (#2327)Gravatar Fred K. Schott 1-58/+64
2022-01-06Fix subpath support regressions (#2330)Gravatar Matthew Phillips 12-22/+566
2022-01-06[ci] yarn formatGravatar natemoo-re 1-2/+2
2022-01-06Added "IntelliSense for TypeScript" (#2326)astro@0.22.7Gravatar Morritz 1-0/+17
2022-01-06[ci] collect statsGravatar FredKSchott 1-0/+1
2022-01-06[ci] yarn formatGravatar FredKSchott 1-8/+8
2022-01-05[ci] release (#2320)Gravatar github-actions[bot] 31-54/+46
2022-01-05chore: update compiler (#2324)Gravatar Nate Moore 3-5/+10