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Merge pull request #310 from h2o/kazuho/fusion
"fusion" AES-GCM engine
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| /* | ||
| * Copyright (c) 2020 Fastly, Kazuho Oku | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to | ||
| * deal in the Software without restriction, including without limitation the | ||
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | ||
| * sell copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | ||
| * IN THE SOFTWARE. | ||
| */ | ||
| #ifndef picotls_fusion_h | ||
| #define picotls_fusion_h | ||
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
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| #include <stddef.h> | ||
| #include <emmintrin.h> | ||
| #include "../picotls.h" | ||
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| #define PTLS_FUSION_AES128_ROUNDS 10 | ||
| #define PTLS_FUSION_AES256_ROUNDS 14 | ||
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| typedef struct ptls_fusion_aesecb_context { | ||
| __m128i keys[PTLS_FUSION_AES256_ROUNDS + 1]; | ||
| unsigned rounds; | ||
| } ptls_fusion_aesecb_context_t; | ||
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| typedef struct ptls_fusion_aesgcm_context ptls_fusion_aesgcm_context_t; | ||
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| void ptls_fusion_aesecb_init(ptls_fusion_aesecb_context_t *ctx, int is_enc, const void *key, size_t key_size); | ||
| void ptls_fusion_aesecb_dispose(ptls_fusion_aesecb_context_t *ctx); | ||
| void ptls_fusion_aesecb_encrypt(ptls_fusion_aesecb_context_t *ctx, void *dst, const void *src); | ||
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| /** | ||
| * Creates an AES-GCM context. | ||
| * @param key the AES key (128 bits) | ||
| * @param capacity maximum size of AEAD record (i.e. AAD + encrypted payload) | ||
| */ | ||
| ptls_fusion_aesgcm_context_t *ptls_fusion_aesgcm_new(const void *key, size_t key_size, size_t capacity); | ||
| /** | ||
| * Updates the capacity. | ||
| */ | ||
| ptls_fusion_aesgcm_context_t *ptls_fusion_aesgcm_set_capacity(ptls_fusion_aesgcm_context_t *ctx, size_t capacity); | ||
| /** | ||
| * Destroys an AES-GCM context. | ||
| */ | ||
| void ptls_fusion_aesgcm_free(ptls_fusion_aesgcm_context_t *ctx); | ||
| /** | ||
| * Encrypts an AEAD block, and in parallel, optionally encrypts one block using AES-ECB. | ||
| * @param ctx context | ||
| * @param output output buffer | ||
| * @param input payload to be encrypted | ||
| * @param inlen size of the payload to be encrypted | ||
| * @param counter | ||
| * @param aad AAD | ||
| * @param aadlen size of AAD | ||
| * @param supp (optional) supplementary encryption context | ||
| */ | ||
| void ptls_fusion_aesgcm_encrypt(ptls_fusion_aesgcm_context_t *ctx, void *output, const void *input, size_t inlen, __m128i ctr, | ||
| const void *aad, size_t aadlen, ptls_aead_supplementary_encryption_t *supp); | ||
| /** | ||
| * Decrypts an AEAD block, an in parallel, optionally encrypts one block using AES-ECB. Returns if decryption was successful. | ||
| * @param iv initialization vector of 12 bytes | ||
| * @param output output buffer | ||
| * @param input payload to be decrypted | ||
| * @param inlen size of the payload to be decrypted | ||
| * @param aad AAD | ||
| * @param aadlen size of AAD | ||
| * @param tag the AEAD tag being received from peer | ||
| */ | ||
| int ptls_fusion_aesgcm_decrypt(ptls_fusion_aesgcm_context_t *ctx, void *output, const void *input, size_t inlen, __m128i ctr, | ||
| const void *aad, size_t aadlen, const void *tag); | ||
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| extern ptls_cipher_algorithm_t ptls_fusion_aes128ctr, ptls_fusion_aes256ctr; | ||
| extern ptls_aead_algorithm_t ptls_fusion_aes128gcm, ptls_fusion_aes256gcm; | ||
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| /** | ||
| * Returns a boolean indicating if fusion can be used. | ||
| */ | ||
| int ptls_fusion_is_supported_by_cpu(void); | ||
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| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
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| #endif |
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