version 1.32, 2000/10/14 12:19:45 |
version 1.32.2.4, 2001/05/07 21:09:25 |
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#include "includes.h" |
#include "includes.h" |
RCSID("$OpenBSD$"); |
RCSID("$OpenBSD$"); |
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#include <openssl/rsa.h> |
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#include <openssl/md5.h> |
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#include "rsa.h" |
#include "rsa.h" |
#include "packet.h" |
#include "packet.h" |
#include "xmalloc.h" |
#include "xmalloc.h" |
#include "ssh.h" |
#include "ssh1.h" |
#include "mpaux.h" |
#include "mpaux.h" |
#include "uidswap.h" |
#include "uidswap.h" |
#include "match.h" |
#include "match.h" |
#include "servconf.h" |
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#include "auth-options.h" |
#include "auth-options.h" |
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#include "pathnames.h" |
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#include "log.h" |
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#include "servconf.h" |
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#include "auth.h" |
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#include <openssl/rsa.h> |
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#include <openssl/md5.h> |
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/* import */ |
/* import */ |
extern ServerOptions options; |
extern ServerOptions options; |
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* Session identifier that is used to bind key exchange and authentication |
* Session identifier that is used to bind key exchange and authentication |
* responses to a particular session. |
* responses to a particular session. |
*/ |
*/ |
extern unsigned char session_id[16]; |
extern u_char session_id[16]; |
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/* |
/* |
* The .ssh/authorized_keys file contains public keys, one per line, in the |
* The .ssh/authorized_keys file contains public keys, one per line, in the |
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{ |
{ |
BIGNUM *challenge, *encrypted_challenge; |
BIGNUM *challenge, *encrypted_challenge; |
BN_CTX *ctx; |
BN_CTX *ctx; |
unsigned char buf[32], mdbuf[16], response[16]; |
u_char buf[32], mdbuf[16], response[16]; |
MD5_CTX md; |
MD5_CTX md; |
unsigned int i; |
u_int i; |
int plen, len; |
int plen, len; |
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encrypted_challenge = BN_new(); |
encrypted_challenge = BN_new(); |
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int |
int |
auth_rsa(struct passwd *pw, BIGNUM *client_n) |
auth_rsa(struct passwd *pw, BIGNUM *client_n) |
{ |
{ |
char line[8192], file[1024]; |
char line[8192], file[MAXPATHLEN]; |
int authenticated; |
int authenticated; |
unsigned int bits; |
u_int bits; |
FILE *f; |
FILE *f; |
unsigned long linenum = 0; |
u_long linenum = 0; |
struct stat st; |
struct stat st; |
RSA *pk; |
RSA *pk; |
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return 0; |
return 0; |
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/* Temporarily use the user's uid. */ |
/* Temporarily use the user's uid. */ |
temporarily_use_uid(pw->pw_uid); |
temporarily_use_uid(pw); |
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/* The authorized keys. */ |
/* The authorized keys. */ |
snprintf(file, sizeof file, "%.500s/%.100s", pw->pw_dir, |
snprintf(file, sizeof file, "%.500s/%.100s", pw->pw_dir, |
SSH_USER_PERMITTED_KEYS); |
_PATH_SSH_USER_PERMITTED_KEYS); |
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/* Fail quietly if file does not exist */ |
/* Fail quietly if file does not exist */ |
if (stat(file, &st) < 0) { |
if (stat(file, &st) < 0) { |
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"bad ownership or modes for '%s'.", pw->pw_name, file); |
"bad ownership or modes for '%s'.", pw->pw_name, file); |
fail = 1; |
fail = 1; |
} else { |
} else { |
/* Check path to SSH_USER_PERMITTED_KEYS */ |
/* Check path to _PATH_SSH_USER_PERMITTED_KEYS */ |
int i; |
int i; |
static const char *check[] = { |
static const char *check[] = { |
"", SSH_USER_DIR, NULL |
"", _PATH_SSH_USER_DIR, NULL |
}; |
}; |
for (i = 0; check[i]; i++) { |
for (i = 0; check[i]; i++) { |
snprintf(line, sizeof line, "%.500s/%.100s", pw->pw_dir, check[i]); |
snprintf(line, sizeof line, "%.500s/%.100s", pw->pw_dir, check[i]); |
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} |
} |
if (fail) { |
if (fail) { |
fclose(f); |
fclose(f); |
log("%s",buf); |
log("%s", buf); |
packet_send_debug("%s",buf); |
packet_send_debug("%s", buf); |
restore_uid(); |
restore_uid(); |
return 0; |
return 0; |
} |
} |
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} |
} |
} else |
} else |
options = NULL; |
options = NULL; |
/* |
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* If our options do not allow this key to be used, |
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* do not send challenge. |
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*/ |
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if (!auth_parse_options(pw, options, linenum)) |
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continue; |
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/* Parse the key from the line. */ |
/* Parse the key from the line. */ |
if (!auth_rsa_read_key(&cp, &bits, pk->e, pk->n)) { |
if (!auth_rsa_read_key(&cp, &bits, pk->e, pk->n)) { |
debug("%.100s, line %lu: bad key syntax", |
debug("%.100s, line %lu: bad key syntax", |
SSH_USER_PERMITTED_KEYS, linenum); |
file, linenum); |
packet_send_debug("%.100s, line %lu: bad key syntax", |
packet_send_debug("%.100s, line %lu: bad key syntax", |
SSH_USER_PERMITTED_KEYS, linenum); |
file, linenum); |
continue; |
continue; |
} |
} |
/* cp now points to the comment part. */ |
/* cp now points to the comment part. */ |
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file, linenum, BN_num_bits(pk->n), bits); |
file, linenum, BN_num_bits(pk->n), bits); |
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/* We have found the desired key. */ |
/* We have found the desired key. */ |
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/* |
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* If our options do not allow this key to be used, |
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* do not send challenge. |
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*/ |
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if (!auth_parse_options(pw, options, file, linenum)) |
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continue; |
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/* Perform the challenge-response dialog for this key. */ |
/* Perform the challenge-response dialog for this key. */ |
if (!auth_rsa_challenge_dialog(pk)) { |
if (!auth_rsa_challenge_dialog(pk)) { |