CODEWITHSUNDEEP
rsajwkjwejose4j
Sushi
Sushi

Reputation: 676

How to use RSA as kty jwk parameter (using jose4j)

I am using jose4j to encrypt a String with JWE, following this documentation https://bitbucket.org/b_c/jose4j/wiki/JWE%20Examples

In the example, they used {\"kty\":\"oct\",\"k\":\"Fdh9u8rINxfivbrianbbVT1u232VQBZYKx1HGAGPt2I\"}

It works well, but how to use RSA as kty ? Should I generate myself a key and put it in the "k" parameter ?

Upvotes: 1

Views: 1469

Answers (2)

Sushi
Sushi

Reputation: 676

Additions to Hans answer, I've looked to the Jose4j Github, and there were many tests that helped me to understand how RSA works on this lib.

Found my answer here : https://github.com/pvliesdonk/jose4j/blob/master/src/test/java/org/jose4j/jwe/RsaOaepKeyManagementAlgorithmTest.java

Upvotes: 0

Hans Z.
Hans Z.

Reputation: 53958

no, a JWK representation of an RSA key has different parameters e.g.:

{
  "kty":"RSA",
  "n": "0vx7agoebGcQSuuPiLJXZptN9nndrQmbXEps2aiAFbWhM78LhWx
     4cbbfAAtVT86zwu1RK7aPFFxuhDR1L6tSoc_BJECPebWKRXjBZCiFV4n3oknjhMs
     tn64tZ_2W-5JsGY4Hc5n9yBXArwl93lqt7_RN5w6Cf0h4QyQ5v-65YGjQR0_FDW2
     QvzqY368QQMicAtaSqzs8KJZgnYb9c7d0zgdAZHzu6qMQvRL5hajrn1n91CbOpbI
     SD08qNLyrdkt-bFTWhAI4vMQFh6WeZu0fM4lFd2NcRwr3XPksINHaQ-G_xBniIqb
     w0Ls1jF44-csFCur-kEgU8awapJzKnqDKgw",
   "e":"AQAB",
   "alg":"RS256",
   "kid":"2011-04-29"
}

See RFC7517 : https://www.rfc-editor.org/rfc/rfc7517

Upvotes: 1

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