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Diffstat (limited to 'sshconnect1.c')
-rw-r--r--sshconnect1.c85
1 files changed, 40 insertions, 45 deletions
diff --git a/sshconnect1.c b/sshconnect1.c
index 2829ca5a..166e392e 100644
--- a/sshconnect1.c
+++ b/sshconnect1.c
@@ -13,7 +13,7 @@
*/
#include "includes.h"
-RCSID("$OpenBSD: sshconnect1.c,v 1.42 2001/12/19 07:18:56 deraadt Exp $");
+RCSID("$OpenBSD: sshconnect1.c,v 1.43 2001/12/27 18:22:16 markus Exp $");
#include <openssl/bn.h>
#include <openssl/evp.h>
@@ -76,8 +76,8 @@ try_agent_authentication(void)
if (!auth)
return 0;
- challenge = BN_new();
-
+ if ((challenge = BN_new()) == NULL)
+ fatal("try_agent_authentication: BN_new failed");
/* Loop through identities served by the agent. */
for (key = ssh_get_first_identity(auth, &comment, 1);
key != NULL;
@@ -241,7 +241,8 @@ try_rsa_authentication(int idx)
packet_disconnect("Protocol error during RSA authentication: %d", type);
/* Get the challenge from the packet. */
- challenge = BN_new();
+ if ((challenge = BN_new()) == NULL)
+ fatal("try_rsa_authentication: BN_new failed");
packet_get_bignum(challenge, &clen);
packet_integrity_check(plen, clen, type);
@@ -355,7 +356,8 @@ try_rhosts_rsa_authentication(const char *local_user, Key * host_key)
packet_disconnect("Protocol error during RSA authentication: %d", type);
/* Get the challenge from the packet. */
- challenge = BN_new();
+ if ((challenge = BN_new()) == NULL)
+ fatal("try_rhosts_rsa_authentication: BN_new failed");
packet_get_bignum(challenge, &clen);
packet_integrity_check(plen, clen, type);
@@ -912,9 +914,7 @@ ssh_kex(char *host, struct sockaddr *hostaddr)
{
int i;
BIGNUM *key;
- RSA *host_key;
- RSA *public_key;
- Key k;
+ Key *host_key, *server_key;
int bits, rbits;
int ssh_cipher_default = SSH_CIPHER_3DES;
u_char session_key[SSH_SESSION_KEY_LENGTH];
@@ -934,32 +934,28 @@ ssh_kex(char *host, struct sockaddr *hostaddr)
cookie[i] = packet_get_char();
/* Get the public key. */
- public_key = RSA_new();
- bits = packet_get_int();/* bits */
- public_key->e = BN_new();
- packet_get_bignum(public_key->e, &clen);
+ server_key = key_new(KEY_RSA1);
+ bits = packet_get_int();
+ packet_get_bignum(server_key->rsa->e, &clen);
sum_len += clen;
- public_key->n = BN_new();
- packet_get_bignum(public_key->n, &clen);
+ packet_get_bignum(server_key->rsa->n, &clen);
sum_len += clen;
- rbits = BN_num_bits(public_key->n);
+ rbits = BN_num_bits(server_key->rsa->n);
if (bits != rbits) {
log("Warning: Server lies about size of server public key: "
"actual size is %d bits vs. announced %d.", rbits, bits);
log("Warning: This may be due to an old implementation of ssh.");
}
/* Get the host key. */
- host_key = RSA_new();
- bits = packet_get_int();/* bits */
- host_key->e = BN_new();
- packet_get_bignum(host_key->e, &clen);
+ host_key = key_new(KEY_RSA1);
+ bits = packet_get_int();
+ packet_get_bignum(host_key->rsa->e, &clen);
sum_len += clen;
- host_key->n = BN_new();
- packet_get_bignum(host_key->n, &clen);
+ packet_get_bignum(host_key->rsa->n, &clen);
sum_len += clen;
- rbits = BN_num_bits(host_key->n);
+ rbits = BN_num_bits(host_key->rsa->n);
if (bits != rbits) {
log("Warning: Server lies about size of server host key: "
"actual size is %d bits vs. announced %d.", rbits, bits);
@@ -974,19 +970,17 @@ ssh_kex(char *host, struct sockaddr *hostaddr)
supported_authentications = packet_get_int();
debug("Received server public key (%d bits) and host key (%d bits).",
- BN_num_bits(public_key->n), BN_num_bits(host_key->n));
+ BN_num_bits(server_key->rsa->n), BN_num_bits(host_key->rsa->n));
packet_integrity_check(payload_len,
8 + 4 + sum_len + 0 + 4 + 0 + 0 + 4 + 4 + 4,
SSH_SMSG_PUBLIC_KEY);
- k.type = KEY_RSA1;
- k.rsa = host_key;
- if (verify_host_key(host, hostaddr, &k) == -1)
+ if (verify_host_key(host, hostaddr, host_key) == -1)
fatal("Host key verification failed.");
client_flags = SSH_PROTOFLAG_SCREEN_NUMBER | SSH_PROTOFLAG_HOST_IN_FWD_OPEN;
- compute_session_id(session_id, cookie, host_key->n, public_key->n);
+ compute_session_id(session_id, cookie, host_key->rsa->n, server_key->rsa->n);
/* Generate a session key. */
arc4random_stir();
@@ -1008,7 +1002,8 @@ ssh_kex(char *host, struct sockaddr *hostaddr)
* is the highest byte of the integer. The session key is xored with
* the first 16 bytes of the session id.
*/
- key = BN_new();
+ if ((key = BN_new()) == NULL)
+ fatal("respond_to_rsa_challenge: BN_new failed");
BN_set_word(key, 0);
for (i = 0; i < SSH_SESSION_KEY_LENGTH; i++) {
BN_lshift(key, key, 8);
@@ -1022,35 +1017,35 @@ ssh_kex(char *host, struct sockaddr *hostaddr)
* Encrypt the integer using the public key and host key of the
* server (key with smaller modulus first).
*/
- if (BN_cmp(public_key->n, host_key->n) < 0) {
+ if (BN_cmp(server_key->rsa->n, host_key->rsa->n) < 0) {
/* Public key has smaller modulus. */
- if (BN_num_bits(host_key->n) <
- BN_num_bits(public_key->n) + SSH_KEY_BITS_RESERVED) {
- fatal("respond_to_rsa_challenge: host_key %d < public_key %d + "
+ if (BN_num_bits(host_key->rsa->n) <
+ BN_num_bits(server_key->rsa->n) + SSH_KEY_BITS_RESERVED) {
+ fatal("respond_to_rsa_challenge: host_key %d < server_key %d + "
"SSH_KEY_BITS_RESERVED %d",
- BN_num_bits(host_key->n),
- BN_num_bits(public_key->n),
+ BN_num_bits(host_key->rsa->n),
+ BN_num_bits(server_key->rsa->n),
SSH_KEY_BITS_RESERVED);
}
- rsa_public_encrypt(key, key, public_key);
- rsa_public_encrypt(key, key, host_key);
+ rsa_public_encrypt(key, key, server_key->rsa);
+ rsa_public_encrypt(key, key, host_key->rsa);
} else {
/* Host key has smaller modulus (or they are equal). */
- if (BN_num_bits(public_key->n) <
- BN_num_bits(host_key->n) + SSH_KEY_BITS_RESERVED) {
- fatal("respond_to_rsa_challenge: public_key %d < host_key %d + "
+ if (BN_num_bits(server_key->rsa->n) <
+ BN_num_bits(host_key->rsa->n) + SSH_KEY_BITS_RESERVED) {
+ fatal("respond_to_rsa_challenge: server_key %d < host_key %d + "
"SSH_KEY_BITS_RESERVED %d",
- BN_num_bits(public_key->n),
- BN_num_bits(host_key->n),
+ BN_num_bits(server_key->rsa->n),
+ BN_num_bits(host_key->rsa->n),
SSH_KEY_BITS_RESERVED);
}
- rsa_public_encrypt(key, key, host_key);
- rsa_public_encrypt(key, key, public_key);
+ rsa_public_encrypt(key, key, host_key->rsa);
+ rsa_public_encrypt(key, key, server_key->rsa);
}
/* Destroy the public keys since we no longer need them. */
- RSA_free(public_key);
- RSA_free(host_key);
+ key_free(server_key);
+ key_free(host_key);
if (options.cipher == SSH_CIPHER_NOT_SET) {
if (cipher_mask_ssh1(1) & supported_ciphers & (1 << ssh_cipher_default))