2 Exception which extracts libcrypto error information
4 from ctypes import c_ulong, c_char_p, create_string_buffer
5 from ctypescrypto import libcrypto, strings_loaded, pyver
7 __all__ = ['LibCryptoError', 'clear_err_stack']
10 def _get_error_str(err_code,buf):
11 return libcrypto.ERR_error_string(err_code,buf)
13 def _get_error_str(err_code,buf):
14 return libcrypto.ERR_error_string(err_code,buf).decode('utf-8')
15 class LibCryptoError(Exception):
17 Exception for libcrypto errors. Adds all the info, which can be
18 extracted from internal (per-thread) libcrypto error stack to the message,
19 passed to the constructor.
21 def __init__(self, msg):
23 if not strings_loaded:
24 libcrypto.ERR_load_crypto_strings()
26 err_code = libcrypto.ERR_get_error()
28 buf = create_string_buffer(128)
30 mesg += "\n\t" + _get_error_str(err_code, buf)
31 err_code = libcrypto.ERR_get_error()
32 super(LibCryptoError, self).__init__(mesg)
34 def clear_err_stack():
36 Clears internal libcrypto err stack. Call it if you've checked
37 return code and processed exceptional situation, so subsequent
38 raising of the LibCryptoError wouldn't list already handled errors
40 libcrypto.ERR_clear_error()
42 libcrypto.ERR_get_error.restype = c_ulong
43 libcrypto.ERR_error_string.restype = c_char_p
44 libcrypto.ERR_error_string.argtypes = (c_ulong, c_char_p)