39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
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/* $OpenBSD: hmac.h,v 1.9 2014/06/24 01:13:21 djm Exp $ */
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/*
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* Copyright (c) 2014 Markus Friedl. All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _HMAC_H
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#define _HMAC_H
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/* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */
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size_t ssh_hmac_bytes(int alg);
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struct sshbuf;
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struct ssh_hmac_ctx;
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struct ssh_hmac_ctx *ssh_hmac_start(int alg);
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/* Sets the state of the HMAC or resets the state if key == NULL */
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int ssh_hmac_init(struct ssh_hmac_ctx *ctx, const void *key, size_t klen)
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__attribute__((__bounded__(__buffer__, 2, 3)));
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int ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen)
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__attribute__((__bounded__(__buffer__, 2, 3)));
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int ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const struct sshbuf *b);
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int ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen)
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__attribute__((__bounded__(__buffer__, 2, 3)));
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void ssh_hmac_free(struct ssh_hmac_ctx *ctx);
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#endif /* _HMAC_H */
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