nuts-foundation/nuts-node

/*
 * Nuts node
 * Copyright (C) 2021 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 crypto

import (
    "context"
    "crypto/ecdsa"
    "errors"
)

// Decrypt decrypts the `cipherText` with key `kid`
func (client *Crypto) Decrypt(ctx context.Context, kid string, cipherText []byte) ([]byte, error) {
    key, err := client.storage.GetPrivateKey(ctx, kid)
    if err != nil {
        return nil, err
    }

    switch privateKey := key.(type) {
    case *ecdsa.PrivateKey:
        return EciesDecrypt(privateKey, cipherText)
    default:
        return nil, errors.New("unsupported decryption key")
    }
}