Fix computing Aad per the RFC by doing base64 encoding #147
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The Authenticated Additional Data per RFC7516, section 5.2, step 14 is the BASE64URL(UTF8(JWE Protected Header)). Biscuit previously used the UTF8(JWE Protected Header) value as Aad. This meant it was unable to decrypt tokens encrypted by external parties. Signed-off-by: Patrick Uiterwijk <[email protected]>
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NOTE: This breaks any existing encrypted JWE's, but those are non-compliant (and won't be decryptable by external libraries anyway). |
lawliet89
approved these changes
Jun 16, 2020
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The Authenticated Additional Data per RFC7516, section 5.2, step 14
is the BASE64URL(UTF8(JWE Protected Header)).
Biscuit previously used the UTF8(JWE Protected Header) value as Aad.
This meant it was unable to decrypt tokens encrypted by external
parties.
Signed-off-by: Patrick Uiterwijk [email protected]