/
utils.go
51 lines (43 loc) · 1.13 KB
/
utils.go
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package main
import (
"crypto"
"crypto/rand"
"crypto/sha256"
"crypto/x509"
"encoding/pem"
"fmt"
"strings"
"github.com/blang/semver"
)
func sign(parsePrivKey func([]byte) (crypto.Signer, error), privatePEM string, source []byte) ([]byte, error) {
block, _ := pem.Decode([]byte(privatePEM))
if block == nil {
return nil, fmt.Errorf("Failed to parse private key PEM")
}
priv, err := parsePrivKey(block.Bytes)
if err != nil {
return nil, fmt.Errorf("Failed to parse private key DER: %v", err)
}
checksum := sha256.Sum256(source)
sig, err := priv.Sign(rand.Reader, checksum[:], crypto.SHA256)
if err != nil {
return nil, fmt.Errorf("Failed to sign: %v", sig)
}
return sig, nil
}
func signec(privatePEM string, source []byte) ([]byte, error) {
parseFn := func(p []byte) (crypto.Signer, error) { return x509.ParseECPrivateKey(p) }
return sign(parseFn, privatePEM, source)
}
func semverParse(v string) (semver.Version, error) {
s := strings.Split(v, ".")
if len(s) < 3 {
v = fmt.Sprintf("%s.0", v)
return semverParse(v)
}
semVer, err := semver.Parse(v)
if err != nil {
return semver.Version{}, err
}
return semVer, nil
}