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author | des <des@FreeBSD.org> | 2008-07-22 19:01:18 +0000 |
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committer | des <des@FreeBSD.org> | 2008-07-22 19:01:18 +0000 |
commit | f1596419c2717cb81dd4b676d5e0cf1a3e30e98c (patch) | |
tree | 9827eb822991aa369cf5d220fce40c3d2011c19f /crypto/openssh/cipher-ctr.c | |
parent | 666aa9cc1660793c97ef29a6cb66dfbb894dde8f (diff) | |
download | FreeBSD-src-f1596419c2717cb81dd4b676d5e0cf1a3e30e98c.zip FreeBSD-src-f1596419c2717cb81dd4b676d5e0cf1a3e30e98c.tar.gz |
Properly flatten openssh/dist.
Diffstat (limited to 'crypto/openssh/cipher-ctr.c')
-rw-r--r-- | crypto/openssh/cipher-ctr.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/crypto/openssh/cipher-ctr.c b/crypto/openssh/cipher-ctr.c deleted file mode 100644 index b24f3a4..0000000 --- a/crypto/openssh/cipher-ctr.c +++ /dev/null @@ -1,152 +0,0 @@ -/* $OpenBSD: cipher-ctr.c,v 1.10 2006/08/03 03:34:42 deraadt Exp $ */ -/* - * Copyright (c) 2003 Markus Friedl <markus@openbsd.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. - */ -#include "includes.h" - -#include <sys/types.h> - -#include <stdarg.h> -#include <string.h> - -#include <openssl/evp.h> - -#include "xmalloc.h" -#include "log.h" - -/* compatibility with old or broken OpenSSL versions */ -#include "openbsd-compat/openssl-compat.h" - -#ifdef USE_BUILTIN_RIJNDAEL -#include "rijndael.h" -#define AES_KEY rijndael_ctx -#define AES_BLOCK_SIZE 16 -#define AES_encrypt(a, b, c) rijndael_encrypt(c, a, b) -#define AES_set_encrypt_key(a, b, c) rijndael_set_key(c, (char *)a, b, 1) -#else -#include <openssl/aes.h> -#endif - -const EVP_CIPHER *evp_aes_128_ctr(void); -void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, u_int); - -struct ssh_aes_ctr_ctx -{ - AES_KEY aes_ctx; - u_char aes_counter[AES_BLOCK_SIZE]; -}; - -/* - * increment counter 'ctr', - * the counter is of size 'len' bytes and stored in network-byte-order. - * (LSB at ctr[len-1], MSB at ctr[0]) - */ -static void -ssh_ctr_inc(u_char *ctr, u_int len) -{ - int i; - - for (i = len - 1; i >= 0; i--) - if (++ctr[i]) /* continue on overflow */ - return; -} - -static int -ssh_aes_ctr(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, - u_int len) -{ - struct ssh_aes_ctr_ctx *c; - u_int n = 0; - u_char buf[AES_BLOCK_SIZE]; - - if (len == 0) - return (1); - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) - return (0); - - while ((len--) > 0) { - if (n == 0) { - AES_encrypt(c->aes_counter, buf, &c->aes_ctx); - ssh_ctr_inc(c->aes_counter, AES_BLOCK_SIZE); - } - *(dest++) = *(src++) ^ buf[n]; - n = (n + 1) % AES_BLOCK_SIZE; - } - return (1); -} - -static int -ssh_aes_ctr_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, - int enc) -{ - struct ssh_aes_ctr_ctx *c; - - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) { - c = xmalloc(sizeof(*c)); - EVP_CIPHER_CTX_set_app_data(ctx, c); - } - if (key != NULL) - AES_set_encrypt_key(key, EVP_CIPHER_CTX_key_length(ctx) * 8, - &c->aes_ctx); - if (iv != NULL) - memcpy(c->aes_counter, iv, AES_BLOCK_SIZE); - return (1); -} - -static int -ssh_aes_ctr_cleanup(EVP_CIPHER_CTX *ctx) -{ - struct ssh_aes_ctr_ctx *c; - - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) != NULL) { - memset(c, 0, sizeof(*c)); - xfree(c); - EVP_CIPHER_CTX_set_app_data(ctx, NULL); - } - return (1); -} - -void -ssh_aes_ctr_iv(EVP_CIPHER_CTX *evp, int doset, u_char * iv, u_int len) -{ - struct ssh_aes_ctr_ctx *c; - - if ((c = EVP_CIPHER_CTX_get_app_data(evp)) == NULL) - fatal("ssh_aes_ctr_iv: no context"); - if (doset) - memcpy(c->aes_counter, iv, len); - else - memcpy(iv, c->aes_counter, len); -} - -const EVP_CIPHER * -evp_aes_128_ctr(void) -{ - static EVP_CIPHER aes_ctr; - - memset(&aes_ctr, 0, sizeof(EVP_CIPHER)); - aes_ctr.nid = NID_undef; - aes_ctr.block_size = AES_BLOCK_SIZE; - aes_ctr.iv_len = AES_BLOCK_SIZE; - aes_ctr.key_len = 16; - aes_ctr.init = ssh_aes_ctr_init; - aes_ctr.cleanup = ssh_aes_ctr_cleanup; - aes_ctr.do_cipher = ssh_aes_ctr; -#ifndef SSH_OLD_EVP - aes_ctr.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | - EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CUSTOM_IV; -#endif - return (&aes_ctr); -} |