nuts-foundation/nuts-node

/*
 * Copyright (C) 2024 Nuts community
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

package jwx

import (
    "errors"

    "github.com/lestrrat-go/jwx/v2/jwa"
)

// ErrUnsupportedSigningKey is returned when an unsupported private key is used to sign. Currently only ecdsa and rsa keys are supported
var ErrUnsupportedSigningKey = errors.New("signing key algorithm not supported")

var SupportedAlgorithms = []jwa.SignatureAlgorithm{jwa.ES256, jwa.EdDSA, jwa.ES384, jwa.ES512, jwa.PS256, jwa.PS384, jwa.PS512}

const DefaultRsaEncryptionAlgorithm = jwa.RSA_OAEP_256
const DefaultEcEncryptionAlgorithm = jwa.ECDH_ES_A256KW
const DefaultContentEncryptionAlgorithm = jwa.A256GCM

func IsAlgorithmSupported(alg jwa.SignatureAlgorithm) bool {
    for _, curr := range SupportedAlgorithms {
        if curr == alg {
            return true
        }
    }
    return false
}

func AddSupportedAlgorithm(alg jwa.SignatureAlgorithm) bool {
    SupportedAlgorithms = append(SupportedAlgorithms, alg)
    return true
}

// SupportedAlgorithmsAsStrings returns the supported algorithms as a slice of strings
func SupportedAlgorithmsAsStrings() []string {
    var result []string
    for _, alg := range SupportedAlgorithms {
        result = append(result, string(alg))
    }
    return result
}