mirror of https://git.matrix.org/git/olm.git
57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
from ._base import lib, c_void_p, c_size_t, c_char_p, \
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create_string_buffer, ERR, OlmError
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lib.olm_utility_size.argtypes = []
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lib.olm_utility_size.restype = c_size_t
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lib.olm_utility.argtypes = [c_void_p]
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lib.olm_utility.restype = c_void_p
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lib.olm_utility_last_error.argtypes = [c_void_p]
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lib.olm_utility_last_error.restype = c_char_p
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def utility_errcheck(res, func, args):
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if res == ERR:
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raise OlmError("%s: %s" % (
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func.__name__, lib.olm_utility_last_error(args[0])
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))
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return res
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def utility_function(func, *types):
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func.argtypes = (c_void_p,) + types
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func.restypes = c_size_t
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func.errcheck = utility_errcheck
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utility_function(
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lib.olm_ed25519_verify,
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c_void_p, c_size_t, # key, key_length
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c_void_p, c_size_t, # message, message_length
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c_void_p, c_size_t, # signature, signature_length
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)
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class Utility(object):
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def __init__(self):
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self.buf = create_string_buffer(lib.olm_utility_size())
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self.ptr = lib.olm_utility(self.buf)
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_utility = None
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def ed25519_verify(key, message, signature):
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""" Verify an ed25519 signature. Raises an OlmError if verification fails.
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Args:
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key(bytes): The ed25519 public key used for signing.
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message(bytes): The signed message.
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signature(bytes): The message signature.
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"""
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global _utility
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if not _utility:
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_utility = Utility()
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lib.olm_ed25519_verify(_utility.ptr,
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key, len(key),
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message, len(message),
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signature, len(signature))
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