/**
* @brief Standard Telnet login check that uses DES to encrypt the passphrase.
*
* Takes a @a passphrase, encrypts it and compares it to the encrypted
* passphrase in the @c TELNETD_PASSWD environment variable. No password is
* required if @c TELNETD_PASSWD is unset. The argument @a user is ignored.
*/
bool rtems_telnetd_login_check(
const char *user,
const char *passphrase
)
{
char *pw = getenv( "TELNETD_PASSWD");
char cryptbuf [21];
char salt [3];
if (pw == NULL || strlen( pw) == 0) {
#ifdef TELNETD_DEFAULT_PASSWD
pw = TELNETD_DEFAULT_PASSWD;
#else
return true;
#endif
}
strncpy( salt, pw, 2);
salt [2] = '\0';
return strcmp(
__des_crypt_r( passphrase, salt, cryptbuf, sizeof( cryptbuf)),
pw
) == 0;
}
char *__crypt_rn(__const char *key, __const char *setting,
void *data, int size)
{
if (setting[0] == '$' && setting[1] == '2')
return _crypt_blowfish_rn(key, setting, (char *)data, size);
if (setting[0] == '$' && setting[1] == '1')
return __md5_crypt_r(key, setting, (char *)data, size);
if (setting[0] == '$' || setting[0] == '_') {
__set_errno(EINVAL);
return NULL;
}
if (size >= sizeof(struct crypt_data))
return __des_crypt_r(key, setting, (struct crypt_data *)data);
__set_errno(ERANGE);
return NULL;
}
char *__crypt_ra(__const char *key, __const char *setting,
void **data, int *size)
{
if (setting[0] == '$' && setting[1] == '2') {
if (_crypt_data_alloc(data, size, CRYPT_OUTPUT_SIZE))
return NULL;
return _crypt_blowfish_rn(key, setting, (char *)*data, *size);
}
if (setting[0] == '$' && setting[1] == '1') {
if (_crypt_data_alloc(data, size, CRYPT_OUTPUT_SIZE))
return NULL;
return __md5_crypt_r(key, setting, (char *)*data, *size);
}
if (setting[0] == '$' || setting[0] == '_') {
__set_errno(EINVAL);
return NULL;
}
if (_crypt_data_alloc(data, size, sizeof(struct crypt_data)))
return NULL;
return __des_crypt_r(key, setting, (struct crypt_data *)*data);
}
