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Annotation of src/usr.bin/ssh/digest.h, Revision 1.8

1.8     ! djm         1: /* $OpenBSD: digest.h,v 1.7 2014/12/21 22:27:56 djm 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
1.8     ! djm        26: #define SSH_DIGEST_SHA1                1
        !            27: #define SSH_DIGEST_SHA256      2
        !            28: #define SSH_DIGEST_SHA384      3
        !            29: #define SSH_DIGEST_SHA512      4
        !            30: #define SSH_DIGEST_MAX         5
1.1       djm        31:
1.6       djm        32: struct sshbuf;
1.2       markus     33: struct ssh_digest_ctx;
1.7       djm        34:
                     35: /* Looks up a digest algorithm by name */
                     36: int ssh_digest_alg_by_name(const char *name);
                     37:
                     38: /* Returns the algorithm name for a digest identifier */
                     39: const char *ssh_digest_alg_name(int alg);
1.2       markus     40:
1.1       djm        41: /* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */
                     42: size_t ssh_digest_bytes(int alg);
                     43:
1.2       markus     44: /* Returns the block size of the digest, e.g. for implementing HMAC */
                     45: size_t ssh_digest_blocksize(struct ssh_digest_ctx *ctx);
                     46:
                     47: /* Copies internal state of digest of 'from' to 'to' */
                     48: int ssh_digest_copy_state(struct ssh_digest_ctx *from,
                     49:     struct ssh_digest_ctx *to);
                     50:
1.1       djm        51: /* One-shot API */
                     52: int ssh_digest_memory(int alg, const void *m, size_t mlen,
                     53:     u_char *d, size_t dlen)
1.4       djm        54:        __attribute__((__bounded__(__buffer__, 2, 3)))
                     55:        __attribute__((__bounded__(__buffer__, 4, 5)));
1.5       djm        56: int ssh_digest_buffer(int alg, const struct sshbuf *b, u_char *d, size_t dlen)
1.4       djm        57:        __attribute__((__bounded__(__buffer__, 3, 4)));
1.1       djm        58:
                     59: /* Update API */
                     60: struct ssh_digest_ctx *ssh_digest_start(int alg);
                     61: int ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen)
1.4       djm        62:        __attribute__((__bounded__(__buffer__, 2, 3)));
1.5       djm        63: int ssh_digest_update_buffer(struct ssh_digest_ctx *ctx,
                     64:     const struct sshbuf *b);
1.1       djm        65: int ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen)
1.4       djm        66:        __attribute__((__bounded__(__buffer__, 2, 3)));
1.1       djm        67: void ssh_digest_free(struct ssh_digest_ctx *ctx);
                     68:
                     69: #endif /* _DIGEST_H */
                     70: