// Get the last OpenSSL error and convert it to a human-readable string
func getErrString() string {
e := C.ERR_get_error()
buf := [120]byte{} // max length specified in OpenSSL doc
bufp := (*_Ctype_char)(unsafe.Pointer(&buf[0]))
C.ERR_error_string_n(e, bufp, C.size_t(len(buf)))
return string(buf[:C.strlen(bufp)])
}
func lastError() string {
buf := C.malloc(1024)
e := C.ERR_get_error() // a C.ulong
C.ERR_load_crypto_strings()
defer C.ERR_free_strings()
C.ERR_error_string_n(e, (*C.char)(buf), 1024)
defer C.free(buf)
return C.GoString((*C.char)(buf))
}
func get_error() string {
packed_error := C.ERR_get_error()
str_buf := make([]byte, C.ERR_ERROR_STRING_BUF_LEN)
C.ERR_error_string_n(packed_error, (*C.char)(unsafe.Pointer(&str_buf[0])), C.ERR_ERROR_STRING_BUF_LEN)
n := bytes.IndexByte(str_buf, 0)
if n > 0 {
return string(str_buf[:n])
} else {
return fmt.Sprintf("error:%x", packed_error)
}
}
func SSLErrorMessage() SSLError {
msg := ""
for {
errCode := C.ERR_get_error()
if errCode == 0 {
break
}
msg += getErrorString(errCode)
}
C.ERR_clear_error()
return SSLError{msg: msg}
}
// errorFromErrorQueue needs to run in the same OS thread as the operation
// that caused the possible error
func errorFromErrorQueue() error {
var errs []string
for {
err := C.ERR_get_error()
if err == 0 {
break
}
errs = append(errs, fmt.Sprintf("%s:%s:%s",
C.GoString(C.ERR_lib_error_string(err)),
C.GoString(C.ERR_func_error_string(err)),
C.GoString(C.ERR_reason_error_string(err))))
}
return errors.New(fmt.Sprintf("SSL errors: %s", strings.Join(errs, "\n")))
}