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56 lines
1.9 KiB
56 lines
1.9 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _NANOHUB_AES_H_
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#define _NANOHUB_AES_H_
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#include <stdint.h>
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struct AesContext {
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uint32_t K[64];
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};
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struct AesSetupTempWorksSpace { //unsed temporarily for aesInitForDecr() only, not used after, need not be live
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struct AesContext tmpCtx;
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};
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#define AES_KEY_WORDS 8
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#define AES_BLOCK_WORDS 4
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#define AES_BLOCK_SIZE 16 // in bytes
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//basic AES block ops
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void aesInitForEncr(struct AesContext *ctx, const uint32_t *k);
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void aesInitForDecr(struct AesContext *ctx, struct AesSetupTempWorksSpace *tmpSpace, const uint32_t *k);
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void aesEncr(struct AesContext *ctx, const uint32_t *src, uint32_t *dst); //encrypts AES_BLOCK_WORDS words
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void aesDecr(struct AesContext *ctx, const uint32_t *src, uint32_t *dst); //deencrypts AES_BLOCK_WORDS words
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//AES-CBC
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struct AesCbcContext {
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struct AesContext aes;
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uint32_t iv[AES_BLOCK_WORDS];
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};
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void aesCbcInitForEncr(struct AesCbcContext *ctx, const uint32_t *k, const uint32_t *iv);
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void aesCbcInitForDecr(struct AesCbcContext *ctx, const uint32_t *k, const uint32_t *iv);
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void aesCbcEncr(struct AesCbcContext *ctx, const uint32_t *src, uint32_t *dst); //encrypts AES_BLOCK_WORDS words
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void aesCbcDecr(struct AesCbcContext *ctx, const uint32_t *src, uint32_t *dst); //encrypts AES_BLOCK_WORDS words
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#endif // _NANOHUB_AES_H_
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