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/*-
* Copyright 2019 Square Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"flag"
"fmt"
"github.com/go-jose/go-jose/v4"
"github.com/go-jose/go-jose/v4/jose-util/generator"
)
var allKeyAlgorithms = []jose.KeyAlgorithm{
jose.ED25519,
jose.RSA1_5,
jose.RSA_OAEP,
jose.RSA_OAEP_256,
jose.A128KW,
jose.A192KW,
jose.A256KW,
jose.DIRECT,
jose.ECDH_ES,
jose.ECDH_ES_A128KW,
jose.ECDH_ES_A192KW,
jose.ECDH_ES_A256KW,
jose.A128GCMKW,
jose.A192GCMKW,
jose.A256GCMKW,
jose.PBES2_HS256_A128KW,
jose.PBES2_HS384_A192KW,
jose.PBES2_HS512_A256KW,
}
var allSignatureAlgorithms = []jose.SignatureAlgorithm{
jose.EdDSA,
jose.HS256,
jose.HS384,
jose.HS512,
jose.RS256,
jose.RS384,
jose.RS512,
jose.ES256,
jose.ES384,
jose.ES512,
jose.PS256,
jose.PS384,
jose.PS512,
}
var allContentEncryption = []jose.ContentEncryption{
jose.A128CBC_HS256,
jose.A192CBC_HS384,
jose.A256CBC_HS512,
jose.A128GCM,
jose.A192GCM,
jose.A256GCM,
}
func encrypt(args []string) error {
fs := flag.NewFlagSet("encrypt", flag.ExitOnError)
encryptAlgFlag := fs.String("alg", "", "Key management algorithm (e.g. RSA-OAEP)")
encryptEncFlag := fs.String("enc", "", "Content encryption algorithm (e.g. A128GCM)")
encryptFullFlag := fs.Bool("full", false, "Use JSON Serialization format (instead of compact)")
registerCommon(fs)
err := fs.Parse(args)
bytes, err := keyBytes()
if err != nil {
return err
}
pub, err := generator.LoadPublicKey(bytes)
if err != nil {
return fmt.Errorf("unable to read public key: %w", err)
}
alg := jose.KeyAlgorithm(*encryptAlgFlag)
enc := jose.ContentEncryption(*encryptEncFlag)
crypter, err := jose.NewEncrypter(enc, jose.Recipient{Algorithm: alg, Key: pub}, nil)
if err != nil {
return fmt.Errorf("unable to instantiate encrypter: %w", err)
}
input, err := readInput(*inFile)
if err != nil {
return err
}
obj, err := crypter.Encrypt(input)
if err != nil {
return fmt.Errorf("unable to encrypt: %w", err)
}
var msg string
if *encryptFullFlag {
msg = obj.FullSerialize()
} else {
msg, err = obj.CompactSerialize()
if err != nil {
return fmt.Errorf("unable to serialzie message: %w", err)
}
}
return writeOutput(*outFile, []byte(msg))
}
func decrypt(args []string) error {
fs := flag.NewFlagSet("decrypt", flag.ExitOnError)
registerCommon(fs)
fs.Parse(args)
bytes, err := keyBytes()
if err != nil {
return err
}
priv, err := generator.LoadPrivateKey(bytes)
if err != nil {
return fmt.Errorf("unable to read private key %s: %w", priv, err)
}
input, err := readInput(*inFile)
if err != nil {
return err
}
obj, err := jose.ParseEncrypted(string(input), allKeyAlgorithms, allContentEncryption)
if err != nil {
return fmt.Errorf("unable to parse message: %w", err)
}
plaintext, err := obj.Decrypt(priv)
if err != nil {
return fmt.Errorf("unable to decrypt message: %w", err)
}
return writeOutput(*outFile, plaintext)
}
func sign(args []string) error {
fs := flag.NewFlagSet("encrypt", flag.ExitOnError)
signAlgFlag := fs.String("alg", "", "Key management algorithm (e.g. RSA-OAEP)")
signFullFlag := fs.Bool("full", false, "Use JSON Serialization format (instead of compact)")
registerCommon(fs)
fs.Parse(args)
bytes, err := keyBytes()
if err != nil {
return err
}
signingKey, err := generator.LoadPrivateKey(bytes)
if err != nil {
return fmt.Errorf("unable to read private key: %w", err)
}
alg := jose.SignatureAlgorithm(*signAlgFlag)
signer, err := jose.NewSigner(jose.SigningKey{Algorithm: alg, Key: signingKey}, nil)
if err != nil {
return fmt.Errorf("unable to make signer: %w", err)
}
input, err := readInput(*inFile)
if err != nil {
return err
}
obj, err := signer.Sign(input)
if err != nil {
return fmt.Errorf("unable to sign: %w", err)
}
var msg string
if *signFullFlag {
msg = obj.FullSerialize()
} else {
msg, err = obj.CompactSerialize()
if err != nil {
return fmt.Errorf("unable to serialize message: %w", err)
}
}
return writeOutput(*outFile, []byte(msg))
}
func verify(args []string) error {
fs := flag.NewFlagSet("verify", flag.ExitOnError)
registerCommon(fs)
fs.Parse(args)
bytes, err := keyBytes()
if err != nil {
return err
}
verificationKey, err := generator.LoadPublicKey(bytes)
if err != nil {
return fmt.Errorf("unable to read public key: %w", err)
}
input, err := readInput(*inFile)
if err != nil {
return err
}
obj, err := jose.ParseSigned(string(input), allSignatureAlgorithms)
if err != nil {
return fmt.Errorf("unable to parse message: %w", err)
}
plaintext, err := obj.Verify(verificationKey)
if err != nil {
return fmt.Errorf("invalid signature: %w", err)
}
return writeOutput(*outFile, plaintext)
}
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