version 1.72.2.5, 2002/06/02 22:56:11 |
version 1.73, 2001/05/18 14:13:29 |
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#include "includes.h" |
#include "includes.h" |
RCSID("$OpenBSD$"); |
RCSID("$OpenBSD$"); |
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#include <openssl/bn.h> |
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#include <openssl/md5.h> |
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#include <openssl/dh.h> |
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#include <openssl/hmac.h> |
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#include "ssh.h" |
#include "ssh.h" |
#include "ssh2.h" |
#include "ssh2.h" |
#include "xmalloc.h" |
#include "xmalloc.h" |
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#include "rsa.h" |
#include "buffer.h" |
#include "buffer.h" |
#include "packet.h" |
#include "packet.h" |
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#include "uidswap.h" |
#include "compat.h" |
#include "compat.h" |
#include "bufaux.h" |
#include "bufaux.h" |
#include "cipher.h" |
#include "cipher.h" |
#include "kex.h" |
#include "kex.h" |
#include "myproposal.h" |
#include "myproposal.h" |
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#include "key.h" |
#include "sshconnect.h" |
#include "sshconnect.h" |
#include "authfile.h" |
#include "authfile.h" |
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#include "cli.h" |
#include "dh.h" |
#include "dh.h" |
#include "authfd.h" |
#include "authfd.h" |
#include "log.h" |
#include "log.h" |
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Kex *xxx_kex = NULL; |
Kex *xxx_kex = NULL; |
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static int |
int |
verify_host_key_callback(Key *hostkey) |
check_host_key_callback(Key *hostkey) |
{ |
{ |
if (verify_host_key(xxx_host, xxx_hostaddr, hostkey) == -1) |
check_host_key(xxx_host, xxx_hostaddr, hostkey, |
fatal("Host key verification failed."); |
options.user_hostfile2, options.system_hostfile2); |
return 0; |
return 0; |
} |
} |
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myproposal[PROPOSAL_MAC_ALGS_STOC] = options.macs; |
myproposal[PROPOSAL_MAC_ALGS_STOC] = options.macs; |
} |
} |
if (options.hostkeyalgorithms != NULL) |
if (options.hostkeyalgorithms != NULL) |
myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = |
myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = |
options.hostkeyalgorithms; |
options.hostkeyalgorithms; |
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/* start key exchange */ |
/* start key exchange */ |
kex = kex_setup(myproposal); |
kex = kex_setup(myproposal); |
kex->client_version_string=client_version_string; |
kex->client_version_string=client_version_string; |
kex->server_version_string=server_version_string; |
kex->server_version_string=server_version_string; |
kex->verify_host_key=&verify_host_key_callback; |
kex->check_host_key=&check_host_key_callback; |
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xxx_kex = kex; |
xxx_kex = kex; |
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typedef int sign_cb_fn( |
typedef int sign_cb_fn( |
Authctxt *authctxt, Key *key, |
Authctxt *authctxt, Key *key, |
u_char **sigp, u_int *lenp, u_char *data, u_int datalen); |
u_char **sigp, int *lenp, u_char *data, int datalen); |
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struct Authctxt { |
struct Authctxt { |
const char *server_user; |
const char *server_user; |
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/* hostbased */ |
/* hostbased */ |
Key **keys; |
Key **keys; |
int nkeys; |
int nkeys; |
/* kbd-interactive */ |
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int info_req_seen; |
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}; |
}; |
struct Authmethod { |
struct Authmethod { |
char *name; /* string to compare against server's list */ |
char *name; /* string to compare against server's list */ |
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int *batch_flag; /* flag in option struct that disables method */ |
int *batch_flag; /* flag in option struct that disables method */ |
}; |
}; |
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void input_userauth_success(int, u_int32_t, void *); |
void input_userauth_success(int type, int plen, void *ctxt); |
void input_userauth_failure(int, u_int32_t, void *); |
void input_userauth_failure(int type, int plen, void *ctxt); |
void input_userauth_banner(int, u_int32_t, void *); |
void input_userauth_banner(int type, int plen, void *ctxt); |
void input_userauth_error(int, u_int32_t, void *); |
void input_userauth_error(int type, int plen, void *ctxt); |
void input_userauth_info_req(int, u_int32_t, void *); |
void input_userauth_info_req(int type, int plen, void *ctxt); |
void input_userauth_pk_ok(int, u_int32_t, void *); |
void input_userauth_pk_ok(int type, int plen, void *ctxt); |
void input_userauth_passwd_changereq(int, u_int32_t, void *); |
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int userauth_none(Authctxt *); |
int userauth_none(Authctxt *authctxt); |
int userauth_pubkey(Authctxt *); |
int userauth_pubkey(Authctxt *authctxt); |
int userauth_passwd(Authctxt *); |
int userauth_passwd(Authctxt *authctxt); |
int userauth_kbdint(Authctxt *); |
int userauth_kbdint(Authctxt *authctxt); |
int userauth_hostbased(Authctxt *); |
int userauth_hostbased(Authctxt *authctxt); |
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void userauth(Authctxt *, char *); |
void userauth(Authctxt *authctxt, char *authlist); |
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static int sign_and_send_pubkey(Authctxt *, Key *, sign_cb_fn *); |
int |
static void clear_auth_state(Authctxt *); |
sign_and_send_pubkey(Authctxt *authctxt, Key *k, |
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sign_cb_fn *sign_callback); |
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void clear_auth_state(Authctxt *authctxt); |
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static Authmethod *authmethod_get(char *authlist); |
Authmethod *authmethod_get(char *authlist); |
static Authmethod *authmethod_lookup(const char *name); |
Authmethod *authmethod_lookup(const char *name); |
static char *authmethods_get(void); |
char *authmethods_get(void); |
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Authmethod authmethods[] = { |
Authmethod authmethods[] = { |
{"hostbased", |
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userauth_hostbased, |
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&options.hostbased_authentication, |
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NULL}, |
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{"publickey", |
{"publickey", |
userauth_pubkey, |
userauth_pubkey, |
&options.pubkey_authentication, |
&options.pubkey_authentication, |
NULL}, |
NULL}, |
{"keyboard-interactive", |
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userauth_kbdint, |
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&options.kbd_interactive_authentication, |
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&options.batch_mode}, |
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{"password", |
{"password", |
userauth_passwd, |
userauth_passwd, |
&options.password_authentication, |
&options.password_authentication, |
&options.batch_mode}, |
&options.batch_mode}, |
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{"keyboard-interactive", |
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userauth_kbdint, |
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&options.kbd_interactive_authentication, |
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&options.batch_mode}, |
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{"hostbased", |
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userauth_hostbased, |
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&options.hostbased_authentication, |
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NULL}, |
{"none", |
{"none", |
userauth_none, |
userauth_none, |
NULL, |
NULL, |
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{ |
{ |
Authctxt authctxt; |
Authctxt authctxt; |
int type; |
int type; |
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int plen; |
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if (options.challenge_response_authentication) |
if (options.challenge_response_authentication) |
options.kbd_interactive_authentication = 1; |
options.kbd_interactive_authentication = 1; |
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packet_put_cstring("ssh-userauth"); |
packet_put_cstring("ssh-userauth"); |
packet_send(); |
packet_send(); |
packet_write_wait(); |
packet_write_wait(); |
type = packet_read(); |
type = packet_read(&plen); |
if (type != SSH2_MSG_SERVICE_ACCEPT) { |
if (type != SSH2_MSG_SERVICE_ACCEPT) { |
fatal("denied SSH2_MSG_SERVICE_ACCEPT: %d", type); |
fatal("denied SSH2_MSG_SERVICE_ACCEPT: %d", type); |
} |
} |
if (packet_remaining() > 0) { |
if (packet_remaining() > 0) { |
char *reply = packet_get_string(NULL); |
char *reply = packet_get_string(&plen); |
debug("service_accept: %s", reply); |
debug("service_accept: %s", reply); |
xfree(reply); |
xfree(reply); |
} else { |
} else { |
debug("buggy server: service_accept w/o service"); |
debug("buggy server: service_accept w/o service"); |
} |
} |
packet_check_eom(); |
packet_done(); |
debug("got SSH2_MSG_SERVICE_ACCEPT"); |
debug("got SSH2_MSG_SERVICE_ACCEPT"); |
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if (options.preferred_authentications == NULL) |
if (options.preferred_authentications == NULL) |
options.preferred_authentications = authmethods_get(); |
options.preferred_authentications = authmethods_get(); |
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/* setup authentication context */ |
/* setup authentication context */ |
memset(&authctxt, 0, sizeof(authctxt)); |
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authctxt.agent = ssh_get_authentication_connection(); |
authctxt.agent = ssh_get_authentication_connection(); |
authctxt.server_user = server_user; |
authctxt.server_user = server_user; |
authctxt.local_user = local_user; |
authctxt.local_user = local_user; |
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authctxt.authlist = NULL; |
authctxt.authlist = NULL; |
authctxt.keys = keys; |
authctxt.keys = keys; |
authctxt.nkeys = nkeys; |
authctxt.nkeys = nkeys; |
authctxt.info_req_seen = 0; |
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if (authctxt.method == NULL) |
if (authctxt.method == NULL) |
fatal("ssh_userauth2: internal error: cannot send userauth none request"); |
fatal("ssh_userauth2: internal error: cannot send userauth none request"); |
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} |
} |
} |
} |
void |
void |
input_userauth_error(int type, u_int32_t seq, void *ctxt) |
input_userauth_error(int type, int plen, void *ctxt) |
{ |
{ |
fatal("input_userauth_error: bad message during authentication: " |
fatal("input_userauth_error: bad message during authentication: " |
"type %d", type); |
"type %d", type); |
} |
} |
void |
void |
input_userauth_banner(int type, u_int32_t seq, void *ctxt) |
input_userauth_banner(int type, int plen, void *ctxt) |
{ |
{ |
char *msg, *lang; |
char *msg, *lang; |
debug3("input_userauth_banner"); |
debug3("input_userauth_banner"); |
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xfree(lang); |
xfree(lang); |
} |
} |
void |
void |
input_userauth_success(int type, u_int32_t seq, void *ctxt) |
input_userauth_success(int type, int plen, void *ctxt) |
{ |
{ |
Authctxt *authctxt = ctxt; |
Authctxt *authctxt = ctxt; |
if (authctxt == NULL) |
if (authctxt == NULL) |
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authctxt->success = 1; /* break out */ |
authctxt->success = 1; /* break out */ |
} |
} |
void |
void |
input_userauth_failure(int type, u_int32_t seq, void *ctxt) |
input_userauth_failure(int type, int plen, void *ctxt) |
{ |
{ |
Authctxt *authctxt = ctxt; |
Authctxt *authctxt = ctxt; |
char *authlist = NULL; |
char *authlist = NULL; |
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authlist = packet_get_string(NULL); |
authlist = packet_get_string(NULL); |
partial = packet_get_char(); |
partial = packet_get_char(); |
packet_check_eom(); |
packet_done(); |
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if (partial != 0) |
if (partial != 0) |
log("Authenticated with partial success."); |
log("Authenticated with partial success."); |
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userauth(authctxt, authlist); |
userauth(authctxt, authlist); |
} |
} |
void |
void |
input_userauth_pk_ok(int type, u_int32_t seq, void *ctxt) |
input_userauth_pk_ok(int type, int plen, void *ctxt) |
{ |
{ |
Authctxt *authctxt = ctxt; |
Authctxt *authctxt = ctxt; |
Key *key = NULL; |
Key *key = NULL; |
Buffer b; |
Buffer b; |
int pktype, sent = 0; |
int alen, blen, sent = 0; |
u_int alen, blen; |
char *pkalg, *pkblob, *fp; |
char *pkalg, *fp; |
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u_char *pkblob; |
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if (authctxt == NULL) |
if (authctxt == NULL) |
fatal("input_userauth_pk_ok: no authentication context"); |
fatal("input_userauth_pk_ok: no authentication context"); |
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pkalg = packet_get_string(&alen); |
pkalg = packet_get_string(&alen); |
pkblob = packet_get_string(&blen); |
pkblob = packet_get_string(&blen); |
} |
} |
packet_check_eom(); |
packet_done(); |
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debug("input_userauth_pk_ok: pkalg %s blen %d lastkey %p hint %d", |
debug("input_userauth_pk_ok: pkalg %s blen %d lastkey %p hint %d", |
pkalg, blen, authctxt->last_key, authctxt->last_key_hint); |
pkalg, blen, authctxt->last_key, authctxt->last_key_hint); |
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debug("no last key or no sign cb"); |
debug("no last key or no sign cb"); |
break; |
break; |
} |
} |
if ((pktype = key_type_from_name(pkalg)) == KEY_UNSPEC) { |
if (key_type_from_name(pkalg) == KEY_UNSPEC) { |
debug("unknown pkalg %s", pkalg); |
debug("unknown pkalg %s", pkalg); |
break; |
break; |
} |
} |
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debug("no key from blob. pkalg %s", pkalg); |
debug("no key from blob. pkalg %s", pkalg); |
break; |
break; |
} |
} |
if (key->type != pktype) { |
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error("input_userauth_pk_ok: type mismatch " |
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"for decoded key (received %d, expected %d)", |
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key->type, pktype); |
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break; |
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} |
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fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX); |
fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX); |
debug2("input_userauth_pk_ok: fp %s", fp); |
debug2("input_userauth_pk_ok: fp %s", fp); |
xfree(fp); |
xfree(fp); |
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} |
} |
sent = sign_and_send_pubkey(authctxt, key, |
sent = sign_and_send_pubkey(authctxt, key, |
authctxt->last_key_sign); |
authctxt->last_key_sign); |
} while (0); |
} while(0); |
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if (key != NULL) |
if (key != NULL) |
key_free(key); |
key_free(key); |
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userauth_passwd(Authctxt *authctxt) |
userauth_passwd(Authctxt *authctxt) |
{ |
{ |
static int attempt = 0; |
static int attempt = 0; |
char prompt[150]; |
char prompt[80]; |
char *password; |
char *password; |
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if (attempt++ >= options.number_of_password_prompts) |
if (attempt++ >= options.number_of_password_prompts) |
return 0; |
return 0; |
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if (attempt != 1) |
if(attempt != 1) |
error("Permission denied, please try again."); |
error("Permission denied, please try again."); |
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snprintf(prompt, sizeof(prompt), "%.30s@%.128s's password: ", |
snprintf(prompt, sizeof(prompt), "%.30s@%.128s's password: ", |
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packet_put_cstring(password); |
packet_put_cstring(password); |
memset(password, 0, strlen(password)); |
memset(password, 0, strlen(password)); |
xfree(password); |
xfree(password); |
packet_add_padding(64); |
packet_inject_ignore(64); |
packet_send(); |
packet_send(); |
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dispatch_set(SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ, |
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&input_userauth_passwd_changereq); |
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return 1; |
return 1; |
} |
} |
/* |
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* parse PASSWD_CHANGEREQ, prompt user and send SSH2_MSG_USERAUTH_REQUEST |
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*/ |
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void |
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input_userauth_passwd_changereq(int type, uint32_t seqnr, void *ctxt) |
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{ |
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Authctxt *authctxt = ctxt; |
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char *info, *lang, *password = NULL, *retype = NULL; |
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char prompt[150]; |
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debug2("input_userauth_passwd_changereq"); |
void |
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if (authctxt == NULL) |
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fatal("input_userauth_passwd_changereq: " |
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"no authentication context"); |
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info = packet_get_string(NULL); |
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lang = packet_get_string(NULL); |
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if (strlen(info) > 0) |
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log("%s", info); |
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xfree(info); |
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xfree(lang); |
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packet_start(SSH2_MSG_USERAUTH_REQUEST); |
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packet_put_cstring(authctxt->server_user); |
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packet_put_cstring(authctxt->service); |
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packet_put_cstring(authctxt->method->name); |
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packet_put_char(1); /* additional info */ |
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snprintf(prompt, sizeof(prompt), |
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"Enter %.30s@%.128s's old password: ", |
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authctxt->server_user, authctxt->host); |
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password = read_passphrase(prompt, 0); |
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packet_put_cstring(password); |
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memset(password, 0, strlen(password)); |
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xfree(password); |
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password = NULL; |
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while (password == NULL) { |
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snprintf(prompt, sizeof(prompt), |
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"Enter %.30s@%.128s's new password: ", |
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authctxt->server_user, authctxt->host); |
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password = read_passphrase(prompt, RP_ALLOW_EOF); |
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if (password == NULL) { |
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/* bail out */ |
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return; |
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} |
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snprintf(prompt, sizeof(prompt), |
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"Retype %.30s@%.128s's new password: ", |
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authctxt->server_user, authctxt->host); |
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retype = read_passphrase(prompt, 0); |
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if (strcmp(password, retype) != 0) { |
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memset(password, 0, strlen(password)); |
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xfree(password); |
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log("Mismatch; try again, EOF to quit."); |
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password = NULL; |
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} |
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memset(retype, 0, strlen(retype)); |
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xfree(retype); |
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} |
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packet_put_cstring(password); |
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memset(password, 0, strlen(password)); |
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xfree(password); |
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packet_add_padding(64); |
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packet_send(); |
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dispatch_set(SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ, |
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&input_userauth_passwd_changereq); |
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} |
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static void |
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clear_auth_state(Authctxt *authctxt) |
clear_auth_state(Authctxt *authctxt) |
{ |
{ |
/* XXX clear authentication state */ |
/* XXX clear authentication state */ |
dispatch_set(SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ, NULL); |
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if (authctxt->last_key != NULL && authctxt->last_key_hint == -1) { |
if (authctxt->last_key != NULL && authctxt->last_key_hint == -1) { |
debug3("clear_auth_state: key_free %p", authctxt->last_key); |
debug3("clear_auth_state: key_free %p", authctxt->last_key); |
key_free(authctxt->last_key); |
key_free(authctxt->last_key); |
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authctxt->last_key_sign = NULL; |
authctxt->last_key_sign = NULL; |
} |
} |
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static int |
int |
sign_and_send_pubkey(Authctxt *authctxt, Key *k, sign_cb_fn *sign_callback) |
sign_and_send_pubkey(Authctxt *authctxt, Key *k, sign_cb_fn *sign_callback) |
{ |
{ |
Buffer b; |
Buffer b; |
u_char *blob, *signature; |
u_char *blob, *signature; |
u_int bloblen, slen; |
int bloblen, slen; |
int skip = 0; |
int skip = 0; |
int ret = -1; |
int ret = -1; |
int have_sig = 1; |
int have_sig = 1; |
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return 1; |
return 1; |
} |
} |
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static int |
int |
send_pubkey_test(Authctxt *authctxt, Key *k, sign_cb_fn *sign_callback, |
send_pubkey_test(Authctxt *authctxt, Key *k, sign_cb_fn *sign_callback, |
int hint) |
int hint) |
{ |
{ |
u_char *blob; |
u_char *blob; |
u_int bloblen, have_sig = 0; |
int bloblen, have_sig = 0; |
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debug3("send_pubkey_test"); |
debug3("send_pubkey_test"); |
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return 1; |
return 1; |
} |
} |
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static Key * |
Key * |
load_identity_file(char *filename) |
load_identity_file(char *filename) |
{ |
{ |
Key *private; |
Key *private; |
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if (options.batch_mode) |
if (options.batch_mode) |
return NULL; |
return NULL; |
snprintf(prompt, sizeof prompt, |
snprintf(prompt, sizeof prompt, |
"Enter passphrase for key '%.100s': ", filename); |
"Enter passphrase for key '%.100s': ", filename); |
for (i = 0; i < options.number_of_password_prompts; i++) { |
for (i = 0; i < options.number_of_password_prompts; i++) { |
passphrase = read_passphrase(prompt, 0); |
passphrase = read_passphrase(prompt, 0); |
if (strcmp(passphrase, "") != 0) { |
if (strcmp(passphrase, "") != 0) { |
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return private; |
return private; |
} |
} |
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static int |
int |
identity_sign_cb(Authctxt *authctxt, Key *key, u_char **sigp, u_int *lenp, |
identity_sign_cb(Authctxt *authctxt, Key *key, u_char **sigp, int *lenp, |
u_char *data, u_int datalen) |
u_char *data, int datalen) |
{ |
{ |
Key *private; |
Key *private; |
int idx, ret; |
int idx, ret; |
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idx = authctxt->last_key_hint; |
idx = authctxt->last_key_hint; |
if (idx < 0) |
if (idx < 0) |
return -1; |
return -1; |
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/* private key is stored in external hardware */ |
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if (options.identity_keys[idx]->flags & KEY_FLAG_EXT) |
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return key_sign(options.identity_keys[idx], sigp, lenp, data, datalen); |
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private = load_identity_file(options.identity_files[idx]); |
private = load_identity_file(options.identity_files[idx]); |
if (private == NULL) |
if (private == NULL) |
return -1; |
return -1; |
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return ret; |
return ret; |
} |
} |
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static int |
int agent_sign_cb(Authctxt *authctxt, Key *key, u_char **sigp, int *lenp, |
agent_sign_cb(Authctxt *authctxt, Key *key, u_char **sigp, u_int *lenp, |
u_char *data, int datalen) |
u_char *data, u_int datalen) |
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{ |
{ |
return ssh_agent_sign(authctxt->agent, key, sigp, lenp, data, datalen); |
return ssh_agent_sign(authctxt->agent, key, sigp, lenp, data, datalen); |
} |
} |
|
|
static int |
int key_sign_cb(Authctxt *authctxt, Key *key, u_char **sigp, int *lenp, |
key_sign_cb(Authctxt *authctxt, Key *key, u_char **sigp, u_int *lenp, |
u_char *data, int datalen) |
u_char *data, u_int datalen) |
|
{ |
{ |
return key_sign(key, sigp, lenp, data, datalen); |
return key_sign(key, sigp, lenp, data, datalen); |
} |
} |
|
|
static int |
int |
userauth_pubkey_agent(Authctxt *authctxt) |
userauth_pubkey_agent(Authctxt *authctxt) |
{ |
{ |
static int called = 0; |
static int called = 0; |
|
|
if (authctxt->agent != NULL) { |
if (authctxt->agent != NULL) { |
do { |
do { |
sent = userauth_pubkey_agent(authctxt); |
sent = userauth_pubkey_agent(authctxt); |
} while (!sent && authctxt->agent->howmany > 0); |
} while(!sent && authctxt->agent->howmany > 0); |
} |
} |
while (!sent && idx < options.num_identity_files) { |
while (!sent && idx < options.num_identity_files) { |
key = options.identity_keys[idx]; |
key = options.identity_keys[idx]; |
|
|
|
|
if (attempt++ >= options.number_of_password_prompts) |
if (attempt++ >= options.number_of_password_prompts) |
return 0; |
return 0; |
/* disable if no SSH2_MSG_USERAUTH_INFO_REQUEST has been seen */ |
|
if (attempt > 1 && !authctxt->info_req_seen) { |
|
debug3("userauth_kbdint: disable: no info_req_seen"); |
|
dispatch_set(SSH2_MSG_USERAUTH_INFO_REQUEST, NULL); |
|
return 0; |
|
} |
|
|
|
debug2("userauth_kbdint"); |
debug2("userauth_kbdint"); |
packet_start(SSH2_MSG_USERAUTH_REQUEST); |
packet_start(SSH2_MSG_USERAUTH_REQUEST); |
|
|
* parse INFO_REQUEST, prompt user and send INFO_RESPONSE |
* parse INFO_REQUEST, prompt user and send INFO_RESPONSE |
*/ |
*/ |
void |
void |
input_userauth_info_req(int type, u_int32_t seq, void *ctxt) |
input_userauth_info_req(int type, int plen, void *ctxt) |
{ |
{ |
Authctxt *authctxt = ctxt; |
Authctxt *authctxt = ctxt; |
char *name, *inst, *lang, *prompt, *response; |
char *name, *inst, *lang, *prompt, *response; |
|
|
if (authctxt == NULL) |
if (authctxt == NULL) |
fatal("input_userauth_info_req: no authentication context"); |
fatal("input_userauth_info_req: no authentication context"); |
|
|
authctxt->info_req_seen = 1; |
|
|
|
name = packet_get_string(NULL); |
name = packet_get_string(NULL); |
inst = packet_get_string(NULL); |
inst = packet_get_string(NULL); |
lang = packet_get_string(NULL); |
lang = packet_get_string(NULL); |
if (strlen(name) > 0) |
if (strlen(name) > 0) |
log("%s", name); |
cli_mesg(name); |
if (strlen(inst) > 0) |
if (strlen(inst) > 0) |
log("%s", inst); |
cli_mesg(inst); |
xfree(name); |
xfree(name); |
xfree(inst); |
xfree(inst); |
xfree(lang); |
xfree(lang); |
|
|
prompt = packet_get_string(NULL); |
prompt = packet_get_string(NULL); |
echo = packet_get_char(); |
echo = packet_get_char(); |
|
|
response = read_passphrase(prompt, echo ? RP_ECHO : 0); |
response = cli_prompt(prompt, echo); |
|
|
packet_put_cstring(response); |
packet_put_cstring(response); |
memset(response, 0, strlen(response)); |
memset(response, 0, strlen(response)); |
xfree(response); |
xfree(response); |
xfree(prompt); |
xfree(prompt); |
} |
} |
packet_check_eom(); /* done with parsing incoming message. */ |
packet_done(); /* done with parsing incoming message. */ |
|
|
packet_add_padding(64); |
packet_inject_ignore(64); |
packet_send(); |
packet_send(); |
} |
} |
|
|
|
|
u_int blen, slen; |
u_int blen, slen; |
int ok, i, len, found = 0; |
int ok, i, len, found = 0; |
|
|
|
p = get_local_name(packet_get_connection_in()); |
|
if (p == NULL) { |
|
error("userauth_hostbased: cannot get local ipaddr/name"); |
|
return 0; |
|
} |
|
len = strlen(p) + 2; |
|
chost = xmalloc(len); |
|
strlcpy(chost, p, len); |
|
strlcat(chost, ".", len); |
|
debug2("userauth_hostbased: chost %s", chost); |
/* check for a useful key */ |
/* check for a useful key */ |
for (i = 0; i < authctxt->nkeys; i++) { |
for (i = 0; i < authctxt->nkeys; i++) { |
private = authctxt->keys[i]; |
private = authctxt->keys[i]; |
|
|
} |
} |
} |
} |
if (!found) { |
if (!found) { |
debug("userauth_hostbased: no more client hostkeys"); |
xfree(chost); |
return 0; |
return 0; |
} |
} |
if (key_to_blob(private, &blob, &blen) == 0) { |
if (key_to_blob(private, &blob, &blen) == 0) { |
key_free(private); |
key_free(private); |
|
xfree(chost); |
return 0; |
return 0; |
} |
} |
/* figure out a name for the client host */ |
|
p = get_local_name(packet_get_connection_in()); |
|
if (p == NULL) { |
|
error("userauth_hostbased: cannot get local ipaddr/name"); |
|
key_free(private); |
|
return 0; |
|
} |
|
len = strlen(p) + 2; |
|
chost = xmalloc(len); |
|
strlcpy(chost, p, len); |
|
strlcat(chost, ".", len); |
|
debug2("userauth_hostbased: chost %s", chost); |
|
|
|
service = datafellows & SSH_BUG_HBSERVICE ? "ssh-userauth" : |
service = datafellows & SSH_BUG_HBSERVICE ? "ssh-userauth" : |
authctxt->service; |
authctxt->service; |
pkalg = xstrdup(key_ssh_name(private)); |
pkalg = xstrdup(key_ssh_name(private)); |
|
|
#ifdef DEBUG_PK |
#ifdef DEBUG_PK |
buffer_dump(&b); |
buffer_dump(&b); |
#endif |
#endif |
|
debug2("xxx: chost %s", chost); |
ok = key_sign(private, &signature, &slen, buffer_ptr(&b), buffer_len(&b)); |
ok = key_sign(private, &signature, &slen, buffer_ptr(&b), buffer_len(&b)); |
key_free(private); |
key_free(private); |
buffer_free(&b); |
buffer_free(&b); |
|
|
* given auth method name, if configurable options permit this method fill |
* given auth method name, if configurable options permit this method fill |
* in auth_ident field and return true, otherwise return false. |
* in auth_ident field and return true, otherwise return false. |
*/ |
*/ |
static int |
int |
authmethod_is_enabled(Authmethod *method) |
authmethod_is_enabled(Authmethod *method) |
{ |
{ |
if (method == NULL) |
if (method == NULL) |
|
|
return 1; |
return 1; |
} |
} |
|
|
static Authmethod * |
Authmethod * |
authmethod_lookup(const char *name) |
authmethod_lookup(const char *name) |
{ |
{ |
Authmethod *method = NULL; |
Authmethod *method = NULL; |
|
|
* next method we should try. If the server initially sends a nil list, |
* next method we should try. If the server initially sends a nil list, |
* use a built-in default list. |
* use a built-in default list. |
*/ |
*/ |
static Authmethod * |
Authmethod * |
authmethod_get(char *authlist) |
authmethod_get(char *authlist) |
{ |
{ |
|
|
char *name = NULL; |
char *name = NULL; |
u_int next; |
int next; |
|
|
/* Use a suitable default if we're passed a nil list. */ |
/* Use a suitable default if we're passed a nil list. */ |
if (authlist == NULL || strlen(authlist) == 0) |
if (authlist == NULL || strlen(authlist) == 0) |
|
|
} |
} |
} |
} |
|
|
static char * |
|
|
#define DELIM "," |
|
char * |
authmethods_get(void) |
authmethods_get(void) |
{ |
{ |
Authmethod *method = NULL; |
Authmethod *method = NULL; |
Buffer b; |
char buf[1024]; |
char *list; |
|
|
|
buffer_init(&b); |
buf[0] = '\0'; |
for (method = authmethods; method->name != NULL; method++) { |
for (method = authmethods; method->name != NULL; method++) { |
if (authmethod_is_enabled(method)) { |
if (authmethod_is_enabled(method)) { |
if (buffer_len(&b) > 0) |
if (buf[0] != '\0') |
buffer_append(&b, ",", 1); |
strlcat(buf, DELIM, sizeof buf); |
buffer_append(&b, method->name, strlen(method->name)); |
strlcat(buf, method->name, sizeof buf); |
} |
} |
} |
} |
buffer_append(&b, "\0", 1); |
return xstrdup(buf); |
list = xstrdup(buffer_ptr(&b)); |
|
buffer_free(&b); |
|
return list; |
|
} |
} |