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