41 lines
873 B
Text
41 lines
873 B
Text
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#!/usr/bin/env python3
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import base64
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import json
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import sys
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def decode_base64url(data):
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# Not the same as "bin/base64 -d":
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# + -> -
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# / -> _
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# = -> ''
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pad = len(data) % 4
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if pad > 0:
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data += '=' * (4 - pad)
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return base64.urlsafe_b64decode(data)
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def decode_jwt(token):
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token = token.rstrip('\n')
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header, payload, signature = token.split('.')
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decoded_header = json.loads(decode_base64url(header))
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decoded_payload = json.loads(decode_base64url(payload))
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# the signature is binary, so we don't decode it
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return decoded_header, decoded_payload, signature
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def main():
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header, payload, signature = decode_jwt(sys.stdin.read())
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out = {
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'header': header,
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'payload': payload,
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'signature': signature,
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}
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print(json.dumps(out, indent=4))
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if __name__ == '__main__':
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main()
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