jose-util

JOSE CLI

The jose-util command line utility allows for encryption, decryption, signing and verification of JOSE messages. Its main purpose is to facilitate dealing with JOSE messages when testing or debugging.

Installation

$ go install github.com/go-jose/go-jose/v4/jose-util@latest

Usage

The utility includes the subcommands encrypt, decrypt, sign, verify and expand. Examples for each command can be found below.

Algorithms are selected via the --alg and --enc flags, which influence the alg and enc headers in respectively. For JWE, --alg specifies the key management algorithm (e.g. RSA-OAEP) and --enc specifies the content encryption algorithm (e.g. A128GCM). For JWS, --alg specifies the signature algorithm (e.g. PS256).

Input and output files can be specified via the --in and --out flags. Either flag can be omitted, in which case jose-util uses stdin/stdout for input/output respectively. By default each command will output a compact message, but it's possible to get the JSON Serialization by supplying the --full flag.

Keys are specified via the --key flag. Supported key types are naked RSA/EC keys and X.509 certificates with embedded RSA/EC keys. Keys must be in PEM, DER or JWK formats.

Testing

cram is used for testing. This can be installed with pip or sudo apt install python-cram See the travis file for how this is used in testing. For example, go build && PATH=$PWD:$PATH cram -v jose-util.t

Testing

cram is used for testing. This can be installed with pip or sudo apt install python-cram See the travis file for how this is used in testing. For example, go build && PATH=$PWD:$PATH cram -v jose-util.t

Examples

Generate key pair

Generates a key pair, either for signing/verification or encryption/decryption. Generated keys will be written to the current directory.

# Generate keys for signing (for RSA-PSS)
jose-util generate-key --use sig --alg RS256

# Generate keys for signing (for EdDSA)
jose-util generate-key --use sig --alg EdDSA

# Generate keys for encryption (for RSA-OAEP)
jose-util generate-key --use enc --alg RSA-OAEP

# Generate keys for encryption (for ECDH-ES)
jose-util generate-key --use enc --alg ECDH-ES+A128KW

Encrypt

Takes a plaintext as input, encrypts, and prints the encrypted message.

# From stdin, to stdout
jose-util encrypt --key public-key.pem --alg RSA-OAEP --enc A128GCM

# Operating on files
jose-util encrypt --key public-key.pem --alg RSA-OAEP --enc A128GCM --in plaintext.txt --out ciphertext.txt

Decrypt

Takes an encrypted message (JWE) as input, decrypts, and prints the plaintext.

# From stdin, to stdout
jose-util decrypt --key private-key.pem

# Operating on files
jose-util decrypt --key private-key.pem --in ciphertext.txt --out plaintext.txt

Sign

Takes a payload as input, signs it, and prints the signed message with the embedded payload.

# From stdin, to stdout
jose-util sign --key private-key.pem --alg PS256

# Operating on files
jose-util sign --key private-key.pem --alg PS256 --in message.txt --out signed-message.txt

Verify

Reads a signed message (JWS), verifies it, and extracts the payload.

# From stdin, to stdout
jose-util verify --key public-key.pem

# Operating on files
jose-util verify --key public-key.pem --in signed-message.txt --out message.txt

Expand

Expands a compact message to the JWE/JWS JSON Serialization format.

jose-util expand --format JWE   # Expands a compact JWE to JWE JSON Serialization
jose-util expand --format JWS   # Expands a compact JWS to JWS JSON Serialization