diff options
Diffstat (limited to 'hmac.h')
| -rw-r--r-- | hmac.h | 38 |
1 files changed, 38 insertions, 0 deletions
@@ -0,0 +1,38 @@ +/* $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 */ |