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37 lines
994 B
C
37 lines
994 B
C
/* $OpenBSD: chacha.h,v 1.5 2021/04/03 05:54:14 djm Exp $ */
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/*
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chacha-merged.c version 20080118
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D. J. Bernstein
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Public domain.
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*/
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#ifndef CHACHA_H
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#define CHACHA_H
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#include <sys/types.h>
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#include <stdlib.h>
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struct chacha_ctx {
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u_int input[16];
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};
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#define CHACHA_MINKEYLEN 16
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#define CHACHA_NONCELEN 8
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#define CHACHA_CTRLEN 8
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#define CHACHA_STATELEN (CHACHA_NONCELEN+CHACHA_CTRLEN)
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#define CHACHA_BLOCKLEN 64
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void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits)
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__attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
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void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr)
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__attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
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__attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
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void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
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u_char *c, u_int bytes)
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__attribute__((__bounded__(__buffer__, 2, 4)))
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__attribute__((__bounded__(__buffer__, 3, 4)));
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#endif /* CHACHA_H */
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