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Annotation of src/usr.bin/ssh/digest.h, Revision 1.3

1.3     ! djm         1: /* $OpenBSD: digest.h,v 1.2 2014/01/27 18:58:14 markus Exp $ */
1.1       djm         2: /*
                      3:  * Copyright (c) 2013 Damien Miller <djm@mindrot.org>
                      4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     16:  */
                     17:
                     18: #ifndef _DIGEST_H
                     19: #define _DIGEST_H
                     20:
                     21: /* Maximum digest output length */
                     22: #define SSH_DIGEST_MAX_LENGTH  64
                     23:
                     24: /* Digest algorithms */
                     25: #define SSH_DIGEST_MD5         0
                     26: #define SSH_DIGEST_RIPEMD160   1
                     27: #define SSH_DIGEST_SHA1                2
                     28: #define SSH_DIGEST_SHA256      3
                     29: #define SSH_DIGEST_SHA384      4
                     30: #define SSH_DIGEST_SHA512      5
                     31: #define SSH_DIGEST_MAX         6
                     32:
1.2       markus     33: struct ssh_digest_ctx;
                     34:
1.1       djm        35: /* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */
                     36: size_t ssh_digest_bytes(int alg);
                     37:
1.2       markus     38: /* Returns the block size of the digest, e.g. for implementing HMAC */
                     39: size_t ssh_digest_blocksize(struct ssh_digest_ctx *ctx);
                     40:
                     41: /* Copies internal state of digest of 'from' to 'to' */
                     42: int ssh_digest_copy_state(struct ssh_digest_ctx *from,
                     43:     struct ssh_digest_ctx *to);
                     44:
1.1       djm        45: /* One-shot API */
                     46: int ssh_digest_memory(int alg, const void *m, size_t mlen,
                     47:     u_char *d, size_t dlen)
1.3     ! djm        48:        __bounded((__buffer__, 2, 3))
        !            49:        __bounded((__buffer__, 4, 5));
1.1       djm        50: int ssh_digest_buffer(int alg, const Buffer *b, u_char *d, size_t dlen)
1.3     ! djm        51:        __bounded((__buffer__, 3, 4));
1.1       djm        52:
                     53: /* Update API */
                     54: struct ssh_digest_ctx *ssh_digest_start(int alg);
                     55: int ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen)
1.3     ! djm        56:        __bounded((__buffer__, 2, 3));
1.1       djm        57: int ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, const Buffer *b);
                     58: int ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen)
1.3     ! djm        59:        __bounded((__buffer__, 2, 3));
1.1       djm        60: void ssh_digest_free(struct ssh_digest_ctx *ctx);
                     61:
                     62: #endif /* _DIGEST_H */
                     63: