55 lines
983 B
Go
55 lines
983 B
Go
package hmpki
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/x509"
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"encoding/pem"
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"os"
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"git.handmadecities.com/HMC/shhh/pkg/pki"
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"github.com/spf13/cobra"
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)
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func init() {
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generateCmd.AddCommand(generateKeyCmd)
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}
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var generateKeyCmd = &cobra.Command{
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Use: "key",
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Short: "Generate a private key and save it to a file",
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RunE: func(cmd *cobra.Command, args []string) error {
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priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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return err
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}
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der, err := x509.MarshalPKCS8PrivateKey(priv)
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if err != nil {
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return err
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}
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pemBytes := pem.EncodeToMemory(&pem.Block{
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Type: pki.PEMTypePrivateKey,
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Bytes: der,
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})
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kf, err := os.OpenFile(
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Output,
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// Write only, and fail if it alreay exists.
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os.O_WRONLY|os.O_CREATE|os.O_EXCL,
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pki.PrivateKeyFilePerms,
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)
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if err != nil {
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return err
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}
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defer kf.Close()
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if _, err = kf.Write(pemBytes); err != nil {
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return err
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}
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return nil
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},
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}
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