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Diffstat (limited to '')
| -rw-r--r-- | digest.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/digest.h b/digest.h new file mode 100644 index 0000000..274574d --- /dev/null +++ b/digest.h @@ -0,0 +1,70 @@ +/* $OpenBSD: digest.h,v 1.8 2017/05/08 22:57:38 djm Exp $ */ +/* + * Copyright (c) 2013 Damien Miller <djm@mindrot.org> + * + * 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 _DIGEST_H +#define _DIGEST_H + +/* Maximum digest output length */ +#define SSH_DIGEST_MAX_LENGTH 64 + +/* Digest algorithms */ +#define SSH_DIGEST_MD5 0 +#define SSH_DIGEST_SHA1 1 +#define SSH_DIGEST_SHA256 2 +#define SSH_DIGEST_SHA384 3 +#define SSH_DIGEST_SHA512 4 +#define SSH_DIGEST_MAX 5 + +struct sshbuf; +struct ssh_digest_ctx; + +/* Looks up a digest algorithm by name */ +int ssh_digest_alg_by_name(const char *name); + +/* Returns the algorithm name for a digest identifier */ +const char *ssh_digest_alg_name(int alg); + +/* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */ +size_t ssh_digest_bytes(int alg); + +/* Returns the block size of the digest, e.g. for implementing HMAC */ +size_t ssh_digest_blocksize(struct ssh_digest_ctx *ctx); + +/* Copies internal state of digest of 'from' to 'to' */ +int ssh_digest_copy_state(struct ssh_digest_ctx *from, + struct ssh_digest_ctx *to); + +/* One-shot API */ +int ssh_digest_memory(int alg, const void *m, size_t mlen, + u_char *d, size_t dlen) + __attribute__((__bounded__(__buffer__, 2, 3))) + __attribute__((__bounded__(__buffer__, 4, 5))); +int ssh_digest_buffer(int alg, const struct sshbuf *b, u_char *d, size_t dlen) + __attribute__((__bounded__(__buffer__, 3, 4))); + +/* Update API */ +struct ssh_digest_ctx *ssh_digest_start(int alg); +int ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen) + __attribute__((__bounded__(__buffer__, 2, 3))); +int ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, + const struct sshbuf *b); +int ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen) + __attribute__((__bounded__(__buffer__, 2, 3))); +void ssh_digest_free(struct ssh_digest_ctx *ctx); + +#endif /* _DIGEST_H */ + |