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# Copyright (C) 2009 Robert Collins <robertc@robertcollins.net>
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# Licenced under the txaws licence available at /LICENSE in the txaws source.
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"""Credentials for accessing AWS services."""
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__all__ = ['AWSCredentials']
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from txaws.util import *
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class AWSCredentials(object):
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def __init__(self, access_key=None, secret_key=None):
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"""Create an AWSCredentials object.
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:param access_key: The access key to use. If None the environment
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variable AWS_ACCESS_KEY_ID is consulted.
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:param secret_key: The secret key to use. If None the environment
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variable AWS_SECRET_ACCESS_KEY is consulted.
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self.secret_key = secret_key
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if self.secret_key is None:
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self.secret_key = os.environ.get('AWS_SECRET_ACCESS_KEY')
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if self.secret_key is None:
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raise ValueError('Could not find AWS_SECRET_ACCESS_KEY')
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self.access_key = access_key
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if self.access_key is None:
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self.access_key = os.environ.get('AWS_ACCESS_KEY_ID')
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if self.access_key is None:
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raise ValueError('Could not find AWS_ACCESS_KEY_ID')
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def sign(self, bytes):
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"""Sign some bytes."""
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return hmac_sha1(self.secret_key, bytes)
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txaws/credentials.py
