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