*/
#include "includes.h"
-RCSID("$OpenBSD: authfd.c,v 1.50 2002/06/05 19:57:12 markus Exp $");
+RCSID("$OpenBSD: authfd.c,v 1.65 2005/05/24 17:32:43 avsm Exp $");
#include <openssl/evp.h>
#include "log.h"
#include "atomicio.h"
+static int agent_present = 0;
+
/* helper */
int decode_reply(int type);
/* macro to check for "agent failure" message */
#define agent_failed(x) \
((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \
- (x == SSH2_AGENT_FAILURE))
+ (x == SSH2_AGENT_FAILURE))
+
+int
+ssh_agent_present(void)
+{
+ int authfd;
+
+ if (agent_present)
+ return 1;
+ if ((authfd = ssh_get_authentication_socket()) == -1)
+ return 0;
+ else {
+ ssh_close_authentication_socket(authfd);
+ return 1;
+ }
+}
/* Returns the number of the authentication fd, or -1 if there is none. */
close(sock);
return -1;
}
+ agent_present = 1;
return sock;
}
static int
ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply)
{
- int l, len;
+ int l;
+ u_int len;
char buf[1024];
/* Get the length of the message, and format it in the buffer. */
PUT_32BIT(buf, len);
/* Send the length and then the packet to the agent. */
- if (atomicio(write, auth->fd, buf, 4) != 4 ||
- atomicio(write, auth->fd, buffer_ptr(request),
+ if (atomicio(vwrite, auth->fd, buf, 4) != 4 ||
+ atomicio(vwrite, auth->fd, buffer_ptr(request),
buffer_len(request)) != buffer_len(request)) {
error("Error writing to authentication socket.");
return 0;
* Wait for response from the agent. First read the length of the
* response packet.
*/
- len = 4;
- while (len > 0) {
- l = read(auth->fd, buf + 4 - len, len);
- if (l == -1 && (errno == EAGAIN || errno == EINTR))
- continue;
- if (l <= 0) {
- error("Error reading response length from authentication socket.");
- return 0;
- }
- len -= l;
+ if (atomicio(read, auth->fd, buf, 4) != 4) {
+ error("Error reading response length from authentication socket.");
+ return 0;
}
/* Extract the length, and check it for sanity. */
len = GET_32BIT(buf);
if (len > 256 * 1024)
- fatal("Authentication response too long: %d", len);
+ fatal("Authentication response too long: %u", len);
/* Read the rest of the response in to the buffer. */
buffer_clear(reply);
l = len;
if (l > sizeof(buf))
l = sizeof(buf);
- l = read(auth->fd, buf, l);
- if (l == -1 && (errno == EAGAIN || errno == EINTR))
- continue;
- if (l <= 0) {
+ if (atomicio(read, auth->fd, buf, l) != l) {
error("Error reading response from authentication socket.");
return 0;
}
- buffer_append(reply, (char *) buf, l);
+ buffer_append(reply, buf, l);
len -= l;
}
return 1;
/* Get the number of entries in the response and check it for sanity. */
auth->howmany = buffer_get_int(&auth->identities);
- if (auth->howmany > 1024)
+ if ((u_int)auth->howmany > 1024)
fatal("Too many identities in authentication reply: %d",
auth->howmany);
buffer_get_bignum(&auth->identities, key->rsa->n);
*comment = buffer_get_string(&auth->identities, NULL);
if (bits != BN_num_bits(key->rsa->n))
- log("Warning: identity keysize mismatch: actual %d, announced %u",
+ logit("Warning: identity keysize mismatch: actual %d, announced %u",
BN_num_bits(key->rsa->n), bits);
break;
case 2:
if (key->type != KEY_RSA1)
return 0;
if (response_type == 0) {
- log("Compatibility with ssh protocol version 1.0 no longer supported.");
+ logit("Compatibility with ssh protocol version 1.0 no longer supported.");
return 0;
}
buffer_init(&buffer);
type = buffer_get_char(&buffer);
if (agent_failed(type)) {
- log("Agent admitted failure to authenticate using the key.");
+ logit("Agent admitted failure to authenticate using the key.");
} else if (type != SSH_AGENT_RSA_RESPONSE) {
fatal("Bad authentication response: %d", type);
} else {
}
type = buffer_get_char(&msg);
if (agent_failed(type)) {
- log("Agent admitted failure to sign using the key.");
+ logit("Agent admitted failure to sign using the key.");
} else if (type != SSH2_AGENT_SIGN_RESPONSE) {
fatal("Bad authentication response: %d", type);
} else {
static void
ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment)
{
- buffer_clear(b);
- buffer_put_char(b, SSH_AGENTC_ADD_RSA_IDENTITY);
buffer_put_int(b, BN_num_bits(key->n));
buffer_put_bignum(b, key->n);
buffer_put_bignum(b, key->e);
static void
ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment)
{
- buffer_clear(b);
- buffer_put_char(b, SSH2_AGENTC_ADD_IDENTITY);
buffer_put_cstring(b, key_ssh_name(key));
switch (key->type) {
case KEY_RSA:
*/
int
-ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
+ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
+ const char *comment, u_int life, u_int confirm)
{
Buffer msg;
- int type;
+ int type, constrained = (life || confirm);
buffer_init(&msg);
switch (key->type) {
case KEY_RSA1:
+ type = constrained ?
+ SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
+ SSH_AGENTC_ADD_RSA_IDENTITY;
+ buffer_put_char(&msg, type);
ssh_encode_identity_rsa1(&msg, key->rsa, comment);
break;
case KEY_RSA:
case KEY_DSA:
+ type = constrained ?
+ SSH2_AGENTC_ADD_ID_CONSTRAINED :
+ SSH2_AGENTC_ADD_IDENTITY;
+ buffer_put_char(&msg, type);
ssh_encode_identity_ssh2(&msg, key, comment);
break;
default:
return 0;
break;
}
+ if (constrained) {
+ if (life != 0) {
+ buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
+ buffer_put_int(&msg, life);
+ }
+ if (confirm != 0)
+ buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
+ }
if (ssh_request_reply(auth, &msg, &msg) == 0) {
buffer_free(&msg);
return 0;
return decode_reply(type);
}
+int
+ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment)
+{
+ return ssh_add_identity_constrained(auth, key, comment, 0, 0);
+}
+
/*
* Removes an identity from the authentication server. This call is not
* meant to be used by normal applications.
}
int
-ssh_update_card(AuthenticationConnection *auth, int add, const char *reader_id, const char *pin)
+ssh_update_card(AuthenticationConnection *auth, int add,
+ const char *reader_id, const char *pin, u_int life, u_int confirm)
{
Buffer msg;
- int type;
+ int type, constrained = (life || confirm);
+
+ if (add) {
+ type = constrained ?
+ SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED :
+ SSH_AGENTC_ADD_SMARTCARD_KEY;
+ } else
+ type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
buffer_init(&msg);
- buffer_put_char(&msg, add ? SSH_AGENTC_ADD_SMARTCARD_KEY :
- SSH_AGENTC_REMOVE_SMARTCARD_KEY);
+ buffer_put_char(&msg, type);
buffer_put_cstring(&msg, reader_id);
buffer_put_cstring(&msg, pin);
+
+ if (constrained) {
+ if (life != 0) {
+ buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
+ buffer_put_int(&msg, life);
+ }
+ if (confirm != 0)
+ buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
+ }
+
if (ssh_request_reply(auth, &msg, &msg) == 0) {
buffer_free(&msg);
return 0;
case SSH_AGENT_FAILURE:
case SSH_COM_AGENT2_FAILURE:
case SSH2_AGENT_FAILURE:
- log("SSH_AGENT_FAILURE");
+ logit("SSH_AGENT_FAILURE");
return 0;
case SSH_AGENT_SUCCESS:
return 1;
andersk / openssh.git / blobdiff