/**
* Decrypt a text that is coded as a base64 string
*
* @param string $text
* @param string $key
* @return string
*/
PHP_METHOD(Phalcon_Crypt, decryptBase64){
zval **text, **key = NULL, **safe = NULL, *decrypt_text;
char *decoded;
int decoded_len;
phalcon_fetch_params_ex(1, 2, &text, &key, &safe);
PHALCON_ENSURE_IS_STRING(text);
if (!key) {
key = &PHALCON_GLOBAL(z_null);
}
if (safe && zend_is_true(*safe)) {
char *tmp = estrndup(Z_STRVAL_PP(text), Z_STRLEN_PP(text));
php_strtr(tmp, Z_STRLEN_PP(text), "-_", "+/", 2);
decoded = (char*)php_base64_decode((unsigned char*)tmp, Z_STRLEN_PP(text), &decoded_len);
efree(tmp);
}
else {
decoded = (char*)php_base64_decode((unsigned char*)(Z_STRVAL_PP(text)), Z_STRLEN_PP(text), &decoded_len);
}
if (!decoded) {
RETURN_FALSE;
}
PHALCON_MM_GROW();
PHALCON_ALLOC_GHOST_ZVAL(decrypt_text);
ZVAL_STRINGL(decrypt_text, decoded, decoded_len, 0);
PHALCON_RETURN_CALL_METHOD(this_ptr, "decrypt", decrypt_text, *key);
RETURN_MM();
}
PHPAPI static int php_discuz_auth_decode(char *buf, const char *str, size_t str_len, const char *key, size_t keylen){
char keya[33], keyb[33], keyc[DISCUZ_AUTH_CKEYLEN+1], cryptkey[65]={0};
unsigned char *base64result;
int retlen;
time_t expiry;
char md5salt[16], md5buf[33], *authcodebuf;
smart_str strbuf = {0};
memcpy(keyc, str, DISCUZ_AUTH_CKEYLEN);
php_discuz_auth_initkey(keya, keyb, cryptkey, keyc, key, keylen);
base64result = php_base64_decode((unsigned char*)(str + DISCUZ_AUTH_CKEYLEN), str_len-DISCUZ_AUTH_CKEYLEN, &retlen);
authcodebuf = (unsigned char *)safe_emalloc(retlen, sizeof(char), 1);
php_discuz_authcode((unsigned char *)authcodebuf, base64result, retlen, cryptkey);
//expiry
bzero(md5buf, sizeof(md5buf));
memcpy(md5buf, authcodebuf, 10);
expiry = atoi(md5buf);
//md5
memcpy(md5salt, authcodebuf + 10, 16);
//if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {
smart_str_appendl(&strbuf, authcodebuf + 26, retlen - 26);
smart_str_appendl(&strbuf, keyb, 32);
php_md5(md5buf, strbuf.c, strbuf.len);
smart_str_free(&strbuf);
if((expiry == 0 || expiry - time(NULL) > 0) && memcmp(md5salt, md5buf, 16) == 0){
memcpy(buf, authcodebuf + 26, retlen-26);
efree(authcodebuf);
return retlen-26;
}
efree(authcodebuf);
return 0;
}