/
jwk.go
47 lines (42 loc) · 964 Bytes
/
jwk.go
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package auth
import (
"bytes"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/x509"
pemlib "encoding/pem"
"fmt"
"gopkg.in/square/go-jose.v1"
)
func LoadECPrivateKey(pem []byte) (*ecdsa.PrivateKey, error) {
//k, err := jose.LoadPrivateKey(pem)
block, _ := pemlib.Decode(pem)
if block == nil {
return nil, fmt.Errorf("No pem block")
}
return x509.ParseECPrivateKey(block.Bytes)
}
func GenES256Key() (pem []byte, err error) {
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return
}
der, err := x509.MarshalECPrivateKey(key)
if err != nil {
return
}
buf := bytes.NewBuffer(nil)
err = pemlib.Encode(buf, &pemlib.Block{Type: "EC PRIVATE KEY", Bytes: der})
pem = buf.Bytes()
return
}
func MarshalJwkJSON(kid, alg string, key interface{}) ([]byte, error) {
jwk := jose.JsonWebKey{
Key: key,
KeyID: kid,
Algorithm: string(jose.ES256),
Use: "sig",
}
return jwk.MarshalJSON()
}