def point_to_share_string(point, charset):
""" Convert a point (a tuple of two integers) into a share string - that is,
a representation of the point that uses the charset provided.
"""
# point should be in the format (1, 4938573982723...)
if '-' in charset:
raise ValueError('The character "-" cannot be in the supplied charset.')
if not isinstance(point, tuple) and len(point) == 2 and \
isinstance(point[0], (int, long)) and isinstance(point[1], (int, long)):
raise ValueError('Point format is invalid. Must be a pair of integers.')
x,y = point
x_string = int_to_charset(x, charset)
y_string = int_to_charset(y, charset)
share_string = x_string + '-' + y_string
return share_string
def recover_secret(cls, shares):
points = []
for share in shares:
points.append(share_string_to_point(share, cls.share_charset))
secret_int = points_to_secret_int(points)
secret_string = int_to_charset(secret_int, cls.secret_charset)
return secret_string
def recover_secret(cls, shares):
points = []
for share in shares:
points.append(share_string_to_point(share, cls.share_charset))
secret_int = points_to_secret_int(points)
secret_string = int_to_charset(secret_int, cls.secret_charset)
return secret_string
def point_to_share_string(point, charset):
""" Convert a point (a tuple of two integers) into a share string - that is,
a representation of the point that uses the charset provided.
"""
# point should be in the format (1, 4938573982723...)
if '-' in charset:
raise ValueError(
'The character "-" cannot be in the supplied charset.')
if not isinstance(point, tuple) and len(point) == 2 and \
isinstance(point[0], (int, long)) and isinstance(point[1], (int, long)):
raise ValueError(
'Point format is invalid. Must be a pair of integers.')
x, y = point
x_string = int_to_charset(x, charset)
y_string = int_to_charset(y, charset)
share_string = x_string + '-' + y_string
return share_string
