20 lines
421 B
C
20 lines
421 B
C
#ifndef CHACHA20_H
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# define CHACHA20_H 1
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# include <stdint.h>
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# define CHACHA20_KEY_BYTES 32
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# define CHACHA20_NONCE_BYTES 12
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# define CHACHA20_BLOCK_BYTES 64
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typedef struct
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{
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uint32_t state[4][4];
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uint32_t ctr;
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} ChaCha20Ctx;
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void chacha20_init(ChaCha20Ctx *ctx, const uint8_t *key, uint32_t ctr,
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const uint8_t *nonce);
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void chacha20_block(ChaCha20Ctx *ctx, uint8_t *out);
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#endif /* !CHACHA20_H */
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