NAME

       jose-jwk-exc - Performs a key exchange using the two input keys

SYNOPSIS

       jose jwk exc [-i JWK] -l JWK -r JWK [-o JWK]

OVERVIEW

       The  jose jwk exc command performs a key exchange using the two input keys and provides the result of the
       exchange as output. The user can specify a JWK template as input and the specified properties will appear
       in the output JWK unmodified.

       A key exchange requires two keys:

       1.  The local key, which usually contains private key material.

       2.  The remote key, which usually contains public key material.

       The algorithm for the exchange is inferred from the inputs.

       The ECDH algorithm performs a standard elliptic curve multiplication such that the public value of \p rem
       is multiplied by the private value of \p.

       The ECMR algorithm has three modes of operation.  Where  the  local  key  has  a  private  key  (the  "d"
       property), it performs exactly like ECDH. If the local key does not have a private key and the remote key
       does  have  a  private key, elliptic curve addition is performed on the two values. Otherwise, if neither
       the local key nor the remote key have a private key, the remote key is  subtracted  from  the  local  key
       using  elliptic  curve  subtraction.  When  using ECMR, be sure to validate the content of your inputs to
       avoid triggering the incorrect operation!

OPTIONS

       -i JSON, --input=JSON
              Parse JWK template from JSON

       -i FILE, --input=FILE
              Read JWK template from FILE

       -i -, --input=-
              Read JWK template from standard input

       -o FILE, --output=FILE
              Write JWK(Set) to FILE

       -o -, --output=-
              Write JWK(Set) to standard input

       -l FILE, --local=FILE
              Read local JWK from FILE

       -l -, --local=-
              Read local JWK from standard input

       -r FILE, --remote=FILE
              Read remote JWK from FILE

       -r -, --remote=-
              Read remote JWK from standard input

EXAMPLES

       Perform a key exchange:

           $ jose jwk gen -i ´{"alg":"ECDH"}´ -o local.jwk
           $ jose jwk gen -i ´{"alg":"ECDH"}´ | jose jwk pub -i- -o remote.jwk
           $ jose jwk exc -l local.jwk -r remote.jwk -o exchanged.jwk

AUTHOR

       Nathaniel McCallum <npmccallum@redhat.com>

SEE ALSO

       jose-alg(1), jose-jwk-exc(1), jose-jwk-gen(1), jose-jwk-pub(1)

                                                    June 2017                                    JOSE-JWK-EXC(1)