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crypto.go
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crypto.go
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// Copyright 2022 VaultOperator Authors
//
// 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 util
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
)
func GenerateRSA(bits int32) ([]byte, error) {
pk, err := rsa.GenerateKey(rand.Reader, int(bits))
if err != nil {
return nil, err
}
x509Enc := x509.MarshalPKCS1PrivateKey(pk)
pemEnc := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509Enc})
return pemEnc, nil
}
func GenerateECDSA(c int32) ([]byte, error) {
var curve elliptic.Curve
switch c {
case 224:
curve = elliptic.P224()
case 256:
curve = elliptic.P256()
case 384:
curve = elliptic.P384()
case 521:
curve = elliptic.P521()
default:
return nil, errors.New("unknown curve")
}
pk, err := ecdsa.GenerateKey(curve, rand.Reader)
if err != nil {
return nil, err
}
x509Enc, err := x509.MarshalECPrivateKey(pk)
if err != nil {
return nil, err
}
pemEnc := pem.EncodeToMemory(&pem.Block{Type: "EC PRIVATE KEY", Bytes: x509Enc})
return pemEnc, nil
}