http signatures: add signing support
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@ -32,7 +32,28 @@ def split_signature(sig):
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def build_signing_string(headers, used_headers):
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return '\n'.join(map(lambda x: ': '.join([x, headers[x]]), used_headers))
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return '\n'.join(map(lambda x: ': '.join([x.lower(), headers[x]]), used_headers))
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def sign_headers(headers, key, key_id):
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used_headers = headers.keys()
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sig = {
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'keyId': key_id,
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'algorithm': 'rsa-sha256',
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'headers': ' '.join(used_headers)
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}
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sigstring = build_signing_string(headers, used_headers)
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pkcs = PKCS1_v1_5.new(key)
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h = SHA256.new()
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h.update(sigstring.encode('ascii'))
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sigdata = pkcs.sign(h)
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sigdata = base64.b64encode(sigdata)
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sig['signature'] = sigdata.decode('ascii')
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chunks = ['{}="{}"'.format(k, v) for k, v in sig.items()]
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return ','.join(chunks)
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async def fetch_actor_key(actor):
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