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- provos@cvs.openbsd.org 2002/01/13 17:27:07 

[ssh-agent.c]
     change to use queue.h macros; okay markus@
This commit is contained in:
Damien Miller 2002-01-22 23:26:13 +11:00
parent df224031ca
commit 1a534ae97f
2 changed files with 73 additions and 83 deletions
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5
ChangeLog
View File

@ -152,6 +152,9 @@
- markus@cvs.openbsd.org 2002/01/12 13:10:29
[auth-skey.c]
undo local change
- provos@cvs.openbsd.org 2002/01/13 17:27:07
[ssh-agent.c]
change to use queue.h macros; okay markus@
20020121
@ -7300,4 +7303,4 @@
- Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1
$Id: ChangeLog,v 1.1766 2002/01/22 12:25:46 djm Exp $
$Id: ChangeLog,v 1.1767 2002/01/22 12:26:13 djm Exp $

151
ssh-agent.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-agent.c,v 1.77 2001/12/29 21:56:01 stevesk Exp $ */
/* $OpenBSD: ssh-agent.c,v 1.78 2002/01/13 17:27:07 provos Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -36,7 +36,8 @@
*/
#include "includes.h"
RCSID("$OpenBSD: ssh-agent.c,v 1.77 2001/12/29 21:56:01 stevesk Exp $");
#include <sys/queue.h>
RCSID("$OpenBSD: ssh-agent.c,v 1.78 2002/01/13 17:27:07 provos Exp $");
#include <openssl/evp.h>
#include <openssl/md5.h>
@ -77,14 +78,15 @@ typedef struct {
u_int sockets_alloc = 0;
SocketEntry *sockets = NULL;
typedef struct {
typedef struct identity {
TAILQ_ENTRY(identity) next;
Key *key;
char *comment;
} Identity;
typedef struct {
int nentries;
Identity *identities;
TAILQ_HEAD(idqueue, identity) idlist;
} Idtab;
/* private key table, one per protocol version */
@ -110,7 +112,7 @@ idtab_init(void)
{
int i;
for (i = 0; i <=2; i++) {
idtable[i].identities = NULL;
TAILQ_INIT(&idtable[i].idlist);
idtable[i].nentries = 0;
}
}
@ -125,19 +127,25 @@ idtab_lookup(int version)
}
/* return matching private key for given public key */
static Key *
lookup_private_key(Key *key, int *idx, int version)
static Identity *
lookup_identity(Key *key, int version)
{
int i;
Identity *id;
Idtab *tab = idtab_lookup(version);
for (i = 0; i < tab->nentries; i++) {
if (key_equal(key, tab->identities[i].key)) {
if (idx != NULL)
*idx = i;
return tab->identities[i].key;
}
TAILQ_FOREACH(id, &tab->idlist, next) {
if (key_equal(key, id->key))
return (id);
}
return NULL;
return (NULL);
}
static void
free_identity(Identity *id)
{
key_free(id->key);
xfree(id->comment);
xfree(id);
}
/* send list of supported public keys to 'client' */
@ -146,14 +154,13 @@ process_request_identities(SocketEntry *e, int version)
{
Idtab *tab = idtab_lookup(version);
Buffer msg;
int i;
Identity *id;
buffer_init(&msg);
buffer_put_char(&msg, (version == 1) ?
SSH_AGENT_RSA_IDENTITIES_ANSWER : SSH2_AGENT_IDENTITIES_ANSWER);
buffer_put_int(&msg, tab->nentries);
for (i = 0; i < tab->nentries; i++) {
Identity *id = &tab->identities[i];
TAILQ_FOREACH(id, &tab->idlist, next) {
if (id->key->type == KEY_RSA1) {
buffer_put_int(&msg, BN_num_bits(id->key->rsa->n));
buffer_put_bignum(&msg, id->key->rsa->e);
@ -176,7 +183,8 @@ process_request_identities(SocketEntry *e, int version)
static void
process_authentication_challenge1(SocketEntry *e)
{
Key *key, *private;
Identity *id;
Key *key;
BIGNUM *challenge;
int i, len;
Buffer msg;
@ -202,8 +210,9 @@ process_authentication_challenge1(SocketEntry *e)
if (response_type != 1)
goto failure;
private = lookup_private_key(key, NULL, 1);
if (private != NULL) {
id = lookup_identity(key, 1);
if (id != NULL) {
Key *private = id->key;
/* Decrypt the challenge using the private key. */
if (rsa_private_decrypt(challenge, challenge, private->rsa) <= 0)
goto failure;
@ -244,7 +253,7 @@ static void
process_sign_request2(SocketEntry *e)
{
extern int datafellows;
Key *key, *private;
Key *key;
u_char *blob, *data, *signature = NULL;
u_int blen, dlen, slen = 0;
int flags;
@ -262,9 +271,9 @@ process_sign_request2(SocketEntry *e)
key = key_from_blob(blob, blen);
if (key != NULL) {
private = lookup_private_key(key, NULL, 2);
if (private != NULL)
ok = key_sign(private, &signature, &slen, data, dlen);
Identity *id = lookup_identity(key, 2);
if (id != NULL)
ok = key_sign(id->key, &signature, &slen, data, dlen);
}
key_free(key);
buffer_init(&msg);
@ -288,7 +297,7 @@ process_sign_request2(SocketEntry *e)
static void
process_remove_identity(SocketEntry *e, int version)
{
Key *key = NULL, *private;
Key *key = NULL;
u_char *blob;
u_int blen;
u_int bits;
@ -312,9 +321,8 @@ process_remove_identity(SocketEntry *e, int version)
break;
}
if (key != NULL) {
int idx;
private = lookup_private_key(key, &idx, version);
if (private != NULL) {
Identity *id = lookup_identity(key, version);
if (id != NULL) {
/*
* We have this key. Free the old key. Since we
* don\'t want to leave empty slots in the middle of
@ -323,19 +331,12 @@ process_remove_identity(SocketEntry *e, int version)
* of the array.
*/
Idtab *tab = idtab_lookup(version);
key_free(tab->identities[idx].key);
xfree(tab->identities[idx].comment);
if (tab->nentries < 1)
fatal("process_remove_identity: "
"internal error: tab->nentries %d",
tab->nentries);
if (idx != tab->nentries - 1) {
int i;
for (i = idx; i < tab->nentries - 1; i++)
tab->identities[i] = tab->identities[i+1];
}
tab->identities[tab->nentries - 1].key = NULL;
tab->identities[tab->nentries - 1].comment = NULL;
TAILQ_REMOVE(&tab->idlist, id, next);
free_identity(id);
tab->nentries--;
success = 1;
}
@ -349,13 +350,14 @@ process_remove_identity(SocketEntry *e, int version)
static void
process_remove_all_identities(SocketEntry *e, int version)
{
u_int i;
Idtab *tab = idtab_lookup(version);
Identity *id;
/* Loop over all identities and clear the keys. */
for (i = 0; i < tab->nentries; i++) {
key_free(tab->identities[i].key);
xfree(tab->identities[i].comment);
for (id = TAILQ_FIRST(&tab->idlist); id;
id = TAILQ_FIRST(&tab->idlist)) {
TAILQ_REMOVE(&tab->idlist, id, next);
free_identity(id);
}
/* Mark that there are no identities. */
@ -429,14 +431,11 @@ process_add_identity(SocketEntry *e, int version)
goto send;
}
success = 1;
if (lookup_private_key(k, NULL, version) == NULL) {
if (tab->nentries == 0)
tab->identities = xmalloc(sizeof(Identity));
else
tab->identities = xrealloc(tab->identities,
(tab->nentries + 1) * sizeof(Identity));
tab->identities[tab->nentries].key = k;
tab->identities[tab->nentries].comment = comment;
if (lookup_identity(k, version) == NULL) {
Identity *id = xmalloc(sizeof(Identity));
id->key = k;
id->comment = comment;
TAILQ_INSERT_TAIL(&tab->idlist, id, next);
/* Increment the number of identities. */
tab->nentries++;
} else {
@ -471,36 +470,28 @@ process_add_smartcard_key (SocketEntry *e)
tab = idtab_lookup(1);
k->type = KEY_RSA1;
if (lookup_private_key(k, NULL, 1) == NULL) {
if (tab->nentries == 0)
tab->identities = xmalloc(sizeof(Identity));
else
tab->identities = xrealloc(tab->identities,
(tab->nentries + 1) * sizeof(Identity));
if (lookup_identity(k, 1) == NULL) {
Identity *id = xmalloc(sizeof(Identity));
n = key_new(KEY_RSA1);
BN_copy(n->rsa->n, k->rsa->n);
BN_copy(n->rsa->e, k->rsa->e);
RSA_set_method(n->rsa, sc_get_engine());
tab->identities[tab->nentries].key = n;
tab->identities[tab->nentries].comment =
xstrdup("rsa1 smartcard");
id->key = n;
id->comment = xstrdup("rsa1 smartcard");
TAILQ_INSERT_TAIL(&tab->idlist, id, next);
tab->nentries++;
}
k->type = KEY_RSA;
tab = idtab_lookup(2);
if (lookup_private_key(k, NULL, 2) == NULL) {
if (tab->nentries == 0)
tab->identities = xmalloc(sizeof(Identity));
else
tab->identities = xrealloc(tab->identities,
(tab->nentries + 1) * sizeof(Identity));
if (lookup_identity(k, 2) == NULL) {
Identity *id = xmalloc(sizeof(Identity));
n = key_new(KEY_RSA);
BN_copy(n->rsa->n, k->rsa->n);
BN_copy(n->rsa->e, k->rsa->e);
RSA_set_method(n->rsa, sc_get_engine());
tab->identities[tab->nentries].key = n;
tab->identities[tab->nentries].comment =
xstrdup("rsa smartcard");
id->key = n;
id->comment = xstrdup("rsa smartcard");
TAILQ_INSERT_TAIL(&tab->idlist, id, next);
tab->nentries++;
}
key_free(k);
@ -513,8 +504,7 @@ send:
static void
process_remove_smartcard_key(SocketEntry *e)
{
Key *k = NULL, *private;
int idx;
Key *k = NULL;
int success = 0;
char *sc_reader_id = NULL;
@ -525,25 +515,22 @@ process_remove_smartcard_key(SocketEntry *e)
if (k == NULL) {
error("sc_get_pubkey failed");
} else {
Identity *id;
k->type = KEY_RSA1;
private = lookup_private_key(k, &idx, 1);
if (private != NULL) {
id = lookup_identity(k, 1);
if (id != NULL) {
Idtab *tab = idtab_lookup(1);
key_free(tab->identities[idx].key);
xfree(tab->identities[idx].comment);
if (idx != tab->nentries)
tab->identities[idx] = tab->identities[tab->nentries];
TAILQ_REMOVE(&tab->idlist, id, next);
free_identity(id);
tab->nentries--;
success = 1;
}
k->type = KEY_RSA;
private = lookup_private_key(k, &idx, 2);
if (private != NULL) {
id = lookup_identity(k, 2);
if (id != NULL) {
Idtab *tab = idtab_lookup(2);
key_free(tab->identities[idx].key);
xfree(tab->identities[idx].comment);
if (idx != tab->nentries)
tab->identities[idx] = tab->identities[tab->nentries];
TAILQ_REMOVE(&tab->idlist, id, next);
free_identity(id);
tab->nentries--;
success = 1;
}