39 lines
1,018 B
Go
39 lines
1,018 B
Go
package sshutil
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"code.google.com/p/go.crypto/ssh"
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)
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const (
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RSA_BITS = 2048 // Default number of bits in an RSA key
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RSA_BITS_MIN = 768 // Minimum number of bits in an RSA key
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)
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// helper function to generate an RSA Private Key.
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func GeneratePrivateKey() (*rsa.PrivateKey, error) {
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return rsa.GenerateKey(rand.Reader, RSA_BITS)
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}
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// helper function that marshalls an RSA Public Key to an SSH
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// .authorized_keys format
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func MarshalPublicKey(pubkey *rsa.PublicKey) string {
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pk, err := ssh.NewPublicKey(pubkey)
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if err != nil {
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return ""
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}
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return string(ssh.MarshalAuthorizedKey(pk))
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}
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// helper function that marshalls an RSA Private Key to
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// a PEM encoded file.
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func MarshalPrivateKey(privkey *rsa.PrivateKey) string {
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privateKeyMarshaled := x509.MarshalPKCS1PrivateKey(privkey)
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privateKeyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Headers: nil, Bytes: privateKeyMarshaled})
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return string(privateKeyPEM)
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}
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