diff options
Diffstat (limited to 'crypto/openssh/cipher.c')
-rw-r--r-- | crypto/openssh/cipher.c | 740 |
1 files changed, 0 insertions, 740 deletions
diff --git a/crypto/openssh/cipher.c b/crypto/openssh/cipher.c deleted file mode 100644 index b5d38747ed803..0000000000000 --- a/crypto/openssh/cipher.c +++ /dev/null @@ -1,740 +0,0 @@ -/* - * Author: Tatu Ylonen <ylo@cs.hut.fi> - * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland - * All rights reserved - * - * As far as I am concerned, the code I have written for this software - * can be used freely for any purpose. Any derived versions of this - * software must be clearly marked as such, and if the derived work is - * incompatible with the protocol description in the RFC file, it must be - * called by a name other than "ssh" or "Secure Shell". - * - * - * Copyright (c) 1999 Niels Provos. All rights reserved. - * Copyright (c) 1999, 2000 Markus Friedl. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "includes.h" -RCSID("$OpenBSD: cipher.c,v 1.62 2002/11/21 22:45:31 markus Exp $"); - -#include "xmalloc.h" -#include "log.h" -#include "cipher.h" - -#include <openssl/md5.h> - -#if OPENSSL_VERSION_NUMBER < 0x00906000L -#define SSH_OLD_EVP -#define EVP_CIPHER_CTX_get_app_data(e) ((e)->app_data) -#endif - -#if OPENSSL_VERSION_NUMBER < 0x00907000L -#include "rijndael.h" -static const EVP_CIPHER *evp_rijndael(void); -#endif -static const EVP_CIPHER *evp_ssh1_3des(void); -static const EVP_CIPHER *evp_ssh1_bf(void); - -struct Cipher { - char *name; - int number; /* for ssh1 only */ - u_int block_size; - u_int key_len; - const EVP_CIPHER *(*evptype)(void); -} ciphers[] = { - { "none", SSH_CIPHER_NONE, 8, 0, EVP_enc_null }, - { "des", SSH_CIPHER_DES, 8, 8, EVP_des_cbc }, - { "3des", SSH_CIPHER_3DES, 8, 16, evp_ssh1_3des }, - { "blowfish", SSH_CIPHER_BLOWFISH, 8, 32, evp_ssh1_bf }, - - { "3des-cbc", SSH_CIPHER_SSH2, 8, 24, EVP_des_ede3_cbc }, - { "blowfish-cbc", SSH_CIPHER_SSH2, 8, 16, EVP_bf_cbc }, - { "cast128-cbc", SSH_CIPHER_SSH2, 8, 16, EVP_cast5_cbc }, - { "arcfour", SSH_CIPHER_SSH2, 8, 16, EVP_rc4 }, -#if OPENSSL_VERSION_NUMBER < 0x00907000L - { "aes128-cbc", SSH_CIPHER_SSH2, 16, 16, evp_rijndael }, - { "aes192-cbc", SSH_CIPHER_SSH2, 16, 24, evp_rijndael }, - { "aes256-cbc", SSH_CIPHER_SSH2, 16, 32, evp_rijndael }, - { "rijndael-cbc@lysator.liu.se", - SSH_CIPHER_SSH2, 16, 32, evp_rijndael }, -#else - { "aes128-cbc", SSH_CIPHER_SSH2, 16, 16, EVP_aes_128_cbc }, - { "aes192-cbc", SSH_CIPHER_SSH2, 16, 24, EVP_aes_192_cbc }, - { "aes256-cbc", SSH_CIPHER_SSH2, 16, 32, EVP_aes_256_cbc }, - { "rijndael-cbc@lysator.liu.se", - SSH_CIPHER_SSH2, 16, 32, EVP_aes_256_cbc }, -#endif - - { NULL, SSH_CIPHER_ILLEGAL, 0, 0, NULL } -}; - -/*--*/ - -u_int -cipher_blocksize(Cipher *c) -{ - return (c->block_size); -} - -u_int -cipher_keylen(Cipher *c) -{ - return (c->key_len); -} - -u_int -cipher_get_number(Cipher *c) -{ - return (c->number); -} - -u_int -cipher_mask_ssh1(int client) -{ - u_int mask = 0; - mask |= 1 << SSH_CIPHER_3DES; /* Mandatory */ - mask |= 1 << SSH_CIPHER_BLOWFISH; - if (client) { - mask |= 1 << SSH_CIPHER_DES; - } - return mask; -} - -Cipher * -cipher_by_name(const char *name) -{ - Cipher *c; - for (c = ciphers; c->name != NULL; c++) - if (strcasecmp(c->name, name) == 0) - return c; - return NULL; -} - -Cipher * -cipher_by_number(int id) -{ - Cipher *c; - for (c = ciphers; c->name != NULL; c++) - if (c->number == id) - return c; - return NULL; -} - -#define CIPHER_SEP "," -int -ciphers_valid(const char *names) -{ - Cipher *c; - char *ciphers, *cp; - char *p; - - if (names == NULL || strcmp(names, "") == 0) - return 0; - ciphers = cp = xstrdup(names); - for ((p = strsep(&cp, CIPHER_SEP)); p && *p != '\0'; - (p = strsep(&cp, CIPHER_SEP))) { - c = cipher_by_name(p); - if (c == NULL || c->number != SSH_CIPHER_SSH2) { - debug("bad cipher %s [%s]", p, names); - xfree(ciphers); - return 0; - } else { - debug3("cipher ok: %s [%s]", p, names); - } - } - debug3("ciphers ok: [%s]", names); - xfree(ciphers); - return 1; -} - -/* - * Parses the name of the cipher. Returns the number of the corresponding - * cipher, or -1 on error. - */ - -int -cipher_number(const char *name) -{ - Cipher *c; - if (name == NULL) - return -1; - c = cipher_by_name(name); - return (c==NULL) ? -1 : c->number; -} - -char * -cipher_name(int id) -{ - Cipher *c = cipher_by_number(id); - return (c==NULL) ? "<unknown>" : c->name; -} - -void -cipher_init(CipherContext *cc, Cipher *cipher, - const u_char *key, u_int keylen, const u_char *iv, u_int ivlen, - int encrypt) -{ - static int dowarn = 1; -#ifdef SSH_OLD_EVP - EVP_CIPHER *type; -#else - const EVP_CIPHER *type; -#endif - int klen; - - if (cipher->number == SSH_CIPHER_DES) { - if (dowarn) { - error("Warning: use of DES is strongly discouraged " - "due to cryptographic weaknesses"); - dowarn = 0; - } - if (keylen > 8) - keylen = 8; - } - cc->plaintext = (cipher->number == SSH_CIPHER_NONE); - - if (keylen < cipher->key_len) - fatal("cipher_init: key length %d is insufficient for %s.", - keylen, cipher->name); - if (iv != NULL && ivlen < cipher->block_size) - fatal("cipher_init: iv length %d is insufficient for %s.", - ivlen, cipher->name); - cc->cipher = cipher; - - type = (*cipher->evptype)(); - - EVP_CIPHER_CTX_init(&cc->evp); -#ifdef SSH_OLD_EVP - if (type->key_len > 0 && type->key_len != keylen) { - debug("cipher_init: set keylen (%d -> %d)", - type->key_len, keylen); - type->key_len = keylen; - } - EVP_CipherInit(&cc->evp, type, (u_char *)key, (u_char *)iv, - (encrypt == CIPHER_ENCRYPT)); -#else - if (EVP_CipherInit(&cc->evp, type, NULL, (u_char *)iv, - (encrypt == CIPHER_ENCRYPT)) == 0) - fatal("cipher_init: EVP_CipherInit failed for %s", - cipher->name); - klen = EVP_CIPHER_CTX_key_length(&cc->evp); - if (klen > 0 && keylen != klen) { - debug2("cipher_init: set keylen (%d -> %d)", klen, keylen); - if (EVP_CIPHER_CTX_set_key_length(&cc->evp, keylen) == 0) - fatal("cipher_init: set keylen failed (%d -> %d)", - klen, keylen); - } - if (EVP_CipherInit(&cc->evp, NULL, (u_char *)key, NULL, -1) == 0) - fatal("cipher_init: EVP_CipherInit: set key failed for %s", - cipher->name); -#endif -} - -void -cipher_crypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len) -{ - if (len % cc->cipher->block_size) - fatal("cipher_encrypt: bad plaintext length %d", len); -#ifdef SSH_OLD_EVP - EVP_Cipher(&cc->evp, dest, (u_char *)src, len); -#else - if (EVP_Cipher(&cc->evp, dest, (u_char *)src, len) == 0) - fatal("evp_crypt: EVP_Cipher failed"); -#endif -} - -void -cipher_cleanup(CipherContext *cc) -{ -#ifdef SSH_OLD_EVP - EVP_CIPHER_CTX_cleanup(&cc->evp); -#else - if (EVP_CIPHER_CTX_cleanup(&cc->evp) == 0) - error("cipher_cleanup: EVP_CIPHER_CTX_cleanup failed"); -#endif -} - -/* - * Selects the cipher, and keys if by computing the MD5 checksum of the - * passphrase and using the resulting 16 bytes as the key. - */ - -void -cipher_set_key_string(CipherContext *cc, Cipher *cipher, - const char *passphrase, int encrypt) -{ - MD5_CTX md; - u_char digest[16]; - - MD5_Init(&md); - MD5_Update(&md, (const u_char *)passphrase, strlen(passphrase)); - MD5_Final(digest, &md); - - cipher_init(cc, cipher, digest, 16, NULL, 0, encrypt); - - memset(digest, 0, sizeof(digest)); - memset(&md, 0, sizeof(md)); -} - -/* Implementations for other non-EVP ciphers */ - -/* - * This is used by SSH1: - * - * What kind of triple DES are these 2 routines? - * - * Why is there a redundant initialization vector? - * - * If only iv3 was used, then, this would till effect have been - * outer-cbc. However, there is also a private iv1 == iv2 which - * perhaps makes differential analysis easier. On the other hand, the - * private iv1 probably makes the CRC-32 attack ineffective. This is a - * result of that there is no longer any known iv1 to use when - * choosing the X block. - */ -struct ssh1_3des_ctx -{ - EVP_CIPHER_CTX k1, k2, k3; -}; - -static int -ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, - int enc) -{ - struct ssh1_3des_ctx *c; - u_char *k1, *k2, *k3; - - 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) - return (1); - if (enc == -1) - enc = ctx->encrypt; - k1 = k2 = k3 = (u_char *) key; - k2 += 8; - if (EVP_CIPHER_CTX_key_length(ctx) >= 16+8) { - if (enc) - k3 += 16; - else - k1 += 16; - } - EVP_CIPHER_CTX_init(&c->k1); - EVP_CIPHER_CTX_init(&c->k2); - EVP_CIPHER_CTX_init(&c->k3); -#ifdef SSH_OLD_EVP - EVP_CipherInit(&c->k1, EVP_des_cbc(), k1, NULL, enc); - EVP_CipherInit(&c->k2, EVP_des_cbc(), k2, NULL, !enc); - EVP_CipherInit(&c->k3, EVP_des_cbc(), k3, NULL, enc); -#else - if (EVP_CipherInit(&c->k1, EVP_des_cbc(), k1, NULL, enc) == 0 || - EVP_CipherInit(&c->k2, EVP_des_cbc(), k2, NULL, !enc) == 0 || - EVP_CipherInit(&c->k3, EVP_des_cbc(), k3, NULL, enc) == 0) { - memset(c, 0, sizeof(*c)); - xfree(c); - EVP_CIPHER_CTX_set_app_data(ctx, NULL); - return (0); - } -#endif - return (1); -} - -static int -ssh1_3des_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, u_int len) -{ - struct ssh1_3des_ctx *c; - - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) { - error("ssh1_3des_cbc: no context"); - return (0); - } -#ifdef SSH_OLD_EVP - EVP_Cipher(&c->k1, dest, (u_char *)src, len); - EVP_Cipher(&c->k2, dest, dest, len); - EVP_Cipher(&c->k3, dest, dest, len); -#else - if (EVP_Cipher(&c->k1, dest, (u_char *)src, len) == 0 || - EVP_Cipher(&c->k2, dest, dest, len) == 0 || - EVP_Cipher(&c->k3, dest, dest, len) == 0) - return (0); -#endif - return (1); -} - -static int -ssh1_3des_cleanup(EVP_CIPHER_CTX *ctx) -{ - struct ssh1_3des_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); -} - -static const EVP_CIPHER * -evp_ssh1_3des(void) -{ - static EVP_CIPHER ssh1_3des; - - memset(&ssh1_3des, 0, sizeof(EVP_CIPHER)); - ssh1_3des.nid = NID_undef; - ssh1_3des.block_size = 8; - ssh1_3des.iv_len = 0; - ssh1_3des.key_len = 16; - ssh1_3des.init = ssh1_3des_init; - ssh1_3des.cleanup = ssh1_3des_cleanup; - ssh1_3des.do_cipher = ssh1_3des_cbc; -#ifndef SSH_OLD_EVP - ssh1_3des.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH; -#endif - return (&ssh1_3des); -} - -/* - * SSH1 uses a variation on Blowfish, all bytes must be swapped before - * and after encryption/decryption. Thus the swap_bytes stuff (yuk). - */ -static void -swap_bytes(const u_char *src, u_char *dst, int n) -{ - u_char c[4]; - - /* Process 4 bytes every lap. */ - for (n = n / 4; n > 0; n--) { - c[3] = *src++; - c[2] = *src++; - c[1] = *src++; - c[0] = *src++; - - *dst++ = c[0]; - *dst++ = c[1]; - *dst++ = c[2]; - *dst++ = c[3]; - } -} - -#ifdef SSH_OLD_EVP -static void bf_ssh1_init (EVP_CIPHER_CTX * ctx, const unsigned char *key, - const unsigned char *iv, int enc) -{ - if (iv != NULL) - memcpy (&(ctx->oiv[0]), iv, 8); - memcpy (&(ctx->iv[0]), &(ctx->oiv[0]), 8); - if (key != NULL) - BF_set_key (&(ctx->c.bf_ks), EVP_CIPHER_CTX_key_length (ctx), - key); -} -#endif -static int (*orig_bf)(EVP_CIPHER_CTX *, u_char *, const u_char *, u_int) = NULL; - -static int -bf_ssh1_cipher(EVP_CIPHER_CTX *ctx, u_char *out, const u_char *in, u_int len) -{ - int ret; - - swap_bytes(in, out, len); - ret = (*orig_bf)(ctx, out, out, len); - swap_bytes(out, out, len); - return (ret); -} - -static const EVP_CIPHER * -evp_ssh1_bf(void) -{ - static EVP_CIPHER ssh1_bf; - - memcpy(&ssh1_bf, EVP_bf_cbc(), sizeof(EVP_CIPHER)); - orig_bf = ssh1_bf.do_cipher; - ssh1_bf.nid = NID_undef; -#ifdef SSH_OLD_EVP - ssh1_bf.init = bf_ssh1_init; -#endif - ssh1_bf.do_cipher = bf_ssh1_cipher; - ssh1_bf.key_len = 32; - return (&ssh1_bf); -} - -#if OPENSSL_VERSION_NUMBER < 0x00907000L -/* RIJNDAEL */ -#define RIJNDAEL_BLOCKSIZE 16 -struct ssh_rijndael_ctx -{ - rijndael_ctx r_ctx; - u_char r_iv[RIJNDAEL_BLOCKSIZE]; -}; - -static int -ssh_rijndael_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, - int enc) -{ - struct ssh_rijndael_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) { - if (enc == -1) - enc = ctx->encrypt; - rijndael_set_key(&c->r_ctx, (u_char *)key, - 8*EVP_CIPHER_CTX_key_length(ctx), enc); - } - if (iv != NULL) - memcpy(c->r_iv, iv, RIJNDAEL_BLOCKSIZE); - return (1); -} - -static int -ssh_rijndael_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, - u_int len) -{ - struct ssh_rijndael_ctx *c; - u_char buf[RIJNDAEL_BLOCKSIZE]; - u_char *cprev, *cnow, *plain, *ivp; - int i, j, blocks = len / RIJNDAEL_BLOCKSIZE; - - if (len == 0) - return (1); - if (len % RIJNDAEL_BLOCKSIZE) - fatal("ssh_rijndael_cbc: bad len %d", len); - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) { - error("ssh_rijndael_cbc: no context"); - return (0); - } - if (ctx->encrypt) { - cnow = dest; - plain = (u_char *)src; - cprev = c->r_iv; - for (i = 0; i < blocks; i++, plain+=RIJNDAEL_BLOCKSIZE, - cnow+=RIJNDAEL_BLOCKSIZE) { - for (j = 0; j < RIJNDAEL_BLOCKSIZE; j++) - buf[j] = plain[j] ^ cprev[j]; - rijndael_encrypt(&c->r_ctx, buf, cnow); - cprev = cnow; - } - memcpy(c->r_iv, cprev, RIJNDAEL_BLOCKSIZE); - } else { - cnow = (u_char *) (src+len-RIJNDAEL_BLOCKSIZE); - plain = dest+len-RIJNDAEL_BLOCKSIZE; - - memcpy(buf, cnow, RIJNDAEL_BLOCKSIZE); - for (i = blocks; i > 0; i--, cnow-=RIJNDAEL_BLOCKSIZE, - plain-=RIJNDAEL_BLOCKSIZE) { - rijndael_decrypt(&c->r_ctx, cnow, plain); - ivp = (i == 1) ? c->r_iv : cnow-RIJNDAEL_BLOCKSIZE; - for (j = 0; j < RIJNDAEL_BLOCKSIZE; j++) - plain[j] ^= ivp[j]; - } - memcpy(c->r_iv, buf, RIJNDAEL_BLOCKSIZE); - } - return (1); -} - -static int -ssh_rijndael_cleanup(EVP_CIPHER_CTX *ctx) -{ - struct ssh_rijndael_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); -} - -static const EVP_CIPHER * -evp_rijndael(void) -{ - static EVP_CIPHER rijndal_cbc; - - memset(&rijndal_cbc, 0, sizeof(EVP_CIPHER)); - rijndal_cbc.nid = NID_undef; - rijndal_cbc.block_size = RIJNDAEL_BLOCKSIZE; - rijndal_cbc.iv_len = RIJNDAEL_BLOCKSIZE; - rijndal_cbc.key_len = 16; - rijndal_cbc.init = ssh_rijndael_init; - rijndal_cbc.cleanup = ssh_rijndael_cleanup; - rijndal_cbc.do_cipher = ssh_rijndael_cbc; -#ifndef SSH_OLD_EVP - rijndal_cbc.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | - EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CUSTOM_IV; -#endif - return (&rijndal_cbc); -} -#endif - -/* - * Exports an IV from the CipherContext required to export the key - * state back from the unprivileged child to the privileged parent - * process. - */ - -int -cipher_get_keyiv_len(CipherContext *cc) -{ - Cipher *c = cc->cipher; - int ivlen; - - if (c->number == SSH_CIPHER_3DES) - ivlen = 24; - else - ivlen = EVP_CIPHER_CTX_iv_length(&cc->evp); - return (ivlen); -} - -void -cipher_get_keyiv(CipherContext *cc, u_char *iv, u_int len) -{ - Cipher *c = cc->cipher; - u_char *civ = NULL; - int evplen; - - switch (c->number) { - case SSH_CIPHER_SSH2: - case SSH_CIPHER_DES: - case SSH_CIPHER_BLOWFISH: - evplen = EVP_CIPHER_CTX_iv_length(&cc->evp); - if (evplen == 0) - return; - if (evplen != len) - fatal("%s: wrong iv length %d != %d", __func__, - evplen, len); - -#if OPENSSL_VERSION_NUMBER < 0x00907000L - if (c->evptype == evp_rijndael) { - struct ssh_rijndael_ctx *aesc; - - aesc = EVP_CIPHER_CTX_get_app_data(&cc->evp); - if (aesc == NULL) - fatal("%s: no rijndael context", __func__); - civ = aesc->r_iv; - } else -#endif - { - civ = cc->evp.iv; - } - break; - case SSH_CIPHER_3DES: { - struct ssh1_3des_ctx *desc; - if (len != 24) - fatal("%s: bad 3des iv length: %d", __func__, len); - desc = EVP_CIPHER_CTX_get_app_data(&cc->evp); - if (desc == NULL) - fatal("%s: no 3des context", __func__); - debug3("%s: Copying 3DES IV", __func__); - memcpy(iv, desc->k1.iv, 8); - memcpy(iv + 8, desc->k2.iv, 8); - memcpy(iv + 16, desc->k3.iv, 8); - return; - } - default: - fatal("%s: bad cipher %d", __func__, c->number); - } - memcpy(iv, civ, len); -} - -void -cipher_set_keyiv(CipherContext *cc, u_char *iv) -{ - Cipher *c = cc->cipher; - u_char *div = NULL; - int evplen = 0; - - switch (c->number) { - case SSH_CIPHER_SSH2: - case SSH_CIPHER_DES: - case SSH_CIPHER_BLOWFISH: - evplen = EVP_CIPHER_CTX_iv_length(&cc->evp); - if (evplen == 0) - return; - -#if OPENSSL_VERSION_NUMBER < 0x00907000L - if (c->evptype == evp_rijndael) { - struct ssh_rijndael_ctx *aesc; - - aesc = EVP_CIPHER_CTX_get_app_data(&cc->evp); - if (aesc == NULL) - fatal("%s: no rijndael context", __func__); - div = aesc->r_iv; - } else -#endif - { - div = cc->evp.iv; - } - break; - case SSH_CIPHER_3DES: { - struct ssh1_3des_ctx *desc; - desc = EVP_CIPHER_CTX_get_app_data(&cc->evp); - if (desc == NULL) - fatal("%s: no 3des context", __func__); - debug3("%s: Installed 3DES IV", __func__); - memcpy(desc->k1.iv, iv, 8); - memcpy(desc->k2.iv, iv + 8, 8); - memcpy(desc->k3.iv, iv + 16, 8); - return; - } - default: - fatal("%s: bad cipher %d", __func__, c->number); - } - memcpy(div, iv, evplen); -} - -#if OPENSSL_VERSION_NUMBER < 0x00907000L -#define EVP_X_STATE(evp) &(evp).c -#define EVP_X_STATE_LEN(evp) sizeof((evp).c) -#else -#define EVP_X_STATE(evp) (evp).cipher_data -#define EVP_X_STATE_LEN(evp) (evp).cipher->ctx_size -#endif - -int -cipher_get_keycontext(CipherContext *cc, u_char *dat) -{ - Cipher *c = cc->cipher; - int plen = 0; - - if (c->evptype == EVP_rc4) { - plen = EVP_X_STATE_LEN(cc->evp); - if (dat == NULL) - return (plen); - memcpy(dat, EVP_X_STATE(cc->evp), plen); - } - return (plen); -} - -void -cipher_set_keycontext(CipherContext *cc, u_char *dat) -{ - Cipher *c = cc->cipher; - int plen; - - if (c->evptype == EVP_rc4) { - plen = EVP_X_STATE_LEN(cc->evp); - memcpy(EVP_X_STATE(cc->evp), dat, plen); - } -} |