Damien Miller | a63128d | 2006-03-15 12:08:28 +1100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2005 Damien Miller <djm@openbsd.org> |
| 3 | * |
| 4 | * Permission to use, copy, modify, and distribute this software for any |
| 5 | * purpose with or without fee is hereby granted, provided that the above |
| 6 | * copyright notice and this permission notice appear in all copies. |
| 7 | * |
| 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 15 | */ |
| 16 | |
| 17 | /* EVP wrapper for SHA256 */ |
| 18 | |
| 19 | #include "includes.h" |
| 20 | #include <openssl/evp.h> |
| 21 | #include <sha2.h> |
| 22 | |
| 23 | RCSID("$OpenBSD: md-sha256.c,v 1.1 2006/03/07 09:07:40 djm Exp $"); |
| 24 | |
| 25 | const EVP_MD *evp_ssh_sha256(void); |
| 26 | |
| 27 | static int |
| 28 | ssh_sha256_init(EVP_MD_CTX *ctxt) |
| 29 | { |
| 30 | SHA256_Init(ctxt->md_data); |
| 31 | return (1); |
| 32 | } |
| 33 | |
| 34 | static int |
| 35 | ssh_sha256_update(EVP_MD_CTX *ctxt, const void *data, unsigned long len) |
| 36 | { |
| 37 | SHA256_Update(ctxt->md_data, data, len); |
| 38 | return (1); |
| 39 | } |
| 40 | |
| 41 | static int |
| 42 | ssh_sha256_final(EVP_MD_CTX *ctxt, unsigned char *digest) |
| 43 | { |
| 44 | SHA256_Final(digest, ctxt->md_data); |
| 45 | return (1); |
| 46 | } |
| 47 | |
| 48 | static int |
| 49 | ssh_sha256_cleanup(EVP_MD_CTX *ctxt) |
| 50 | { |
| 51 | memset(ctxt->md_data, 0, sizeof(SHA256_CTX)); |
| 52 | return (1); |
| 53 | } |
| 54 | |
| 55 | const EVP_MD * |
| 56 | evp_ssh_sha256(void) |
| 57 | { |
| 58 | static EVP_MD ssh_sha256; |
| 59 | |
| 60 | memset(&ssh_sha256, 0, sizeof(ssh_sha256)); |
| 61 | ssh_sha256.type = NID_undef; |
| 62 | ssh_sha256.md_size = SHA256_DIGEST_LENGTH; |
| 63 | ssh_sha256.init = ssh_sha256_init; |
| 64 | ssh_sha256.update = ssh_sha256_update; |
| 65 | ssh_sha256.final = ssh_sha256_final; |
| 66 | ssh_sha256.cleanup = ssh_sha256_cleanup; |
| 67 | ssh_sha256.block_size = SHA256_BLOCK_LENGTH; |
| 68 | ssh_sha256.ctx_size = sizeof(SHA256_CTX); |
| 69 | |
| 70 | return (&ssh_sha256); |
| 71 | } |