FredrikAppelros / jwk2pem

Command line utility for converting cryptographic keys from JWK to PEM format

jwk2pem

A small command line utility for converting cryptographic keys from JWK to PEM format.

Usage

Just supply the key in JWK format through stdin and you will get the same key back in PEM format through stdout:

jwk2pem <<< '
{
  "use": "sig",
  "kty": "RSA",
  "kid": "public:e00d54c9-3f94-461b-9d2c-d0f6f45fa4d6",
  "alg": "RS256",
  "n":   "uIbJbxIEzsSikj8HuDiTrbSJxPHrDoGrWOawY2hlZezknK_LTXf4wxNNG63ERtt6aBn7rikWJzvh3xa5aqVCSLnSDCrmIQ2KRmm-POWYoXKipABsiOELx8SkYXmHxVq_wke1opVRimKJTcjKcoVnnn9tLkrizTOWdqGjjhobvdTc_jEoqSMO5qJQPcmOgOrxsgSJHJnzh0u44TH6a2dGBpYpyAyYZgOoZDs2jtICYgAKJ4Jb_B9KJd34uayuGsB-DunqFED2KNreFyyB5JSu7XI2EBmYri2pmkpP70KqlkMpxSYF0VluTay_RDT_lwx-3QcdyHAvNSheHWPBcEalEG8tVLqezz133I3Fat6WAD0y5mAJD6d1j6yAdS7uDigi3Tf5IvveJRIIQi7b_hYwX5FjWVse4c0b27inpVLMXvQlYEgiy19E5bKykdKXkvdGzFNPrlL2fCHlMlDUOnEWWMnLR2_iSca3TV09YDGylk3CmU3Cw5OUVbqNWc9gcfdt4FrfF5qqEeOEYAya5pigMCKqTNwKqTTKZtEZLdfYdB1yxP1aSt2d7nIwFF6J32fNA6g8Wq01B7R_drw5BY5D5k8Sl8V5QERndGFQYl7W3J3wPuqcHlHZ-q2l5f-DH1d9fLW8zNbYtnDqpQEqN44mLjvGAk3MkwcKsjsbVkFsWF8",
  "e": "AQAB"
}'