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- /*
- * The MIT License (MIT)
- *
- * Copyright (c) 2015 Andrew Moon, Vsevolod Stakhov
- *
- * 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 CHACHA_H_
- #define CHACHA_H_
-
-
- #define CHACHA_BLOCKBYTES 64
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- typedef struct chacha_state_internal_t {
- unsigned char s[48];
- size_t rounds;
- size_t leftover;
- unsigned char buffer[CHACHA_BLOCKBYTES];
- } chacha_state_internal;
-
- typedef struct chacha_state_t {
- unsigned char opaque[128];
- } chacha_state;
-
- typedef struct chacha_key_t {
- unsigned char b[32];
- } chacha_key;
-
- typedef struct chacha_iv_t {
- unsigned char b[8];
- } chacha_iv;
-
- typedef struct chacha_iv24_t {
- unsigned char b[24];
- } chacha_iv24;
-
- void hchacha(const unsigned char key[32], const unsigned char iv[16],
- unsigned char out[32], size_t rounds);
-
- void chacha_init(chacha_state *S, const chacha_key *key, const chacha_iv *iv,
- size_t rounds);
-
- void xchacha_init(chacha_state *S, const chacha_key *key,
- const chacha_iv24 *iv, size_t rounds);
-
- size_t chacha_update(chacha_state *S, const unsigned char *in,
- unsigned char *out, size_t inlen);
-
- size_t chacha_final(chacha_state *S, unsigned char *out);
-
- void chacha(const chacha_key *key, const chacha_iv *iv,
- const unsigned char *in, unsigned char *out, size_t inlen,
- size_t rounds);
-
- void xchacha(const chacha_key *key, const chacha_iv24 *iv,
- const unsigned char *in, unsigned char *out, size_t inlen,
- size_t rounds);
-
- const char *chacha_load(void);
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* CHACHA_H_ */
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