func computeAwsKeyFingerprint(publicKey *fi.ResourceHolder) (string, error) {
publicKeyString, err := publicKey.AsString()
if err != nil {
return "", fmt.Errorf("error reading SSH public key: %v", err)
}
tokens := strings.Split(publicKeyString, " ")
if len(tokens) < 2 {
return "", fmt.Errorf("error parsing SSH public key: %s", publicKeyString)
}
sshPublicKeyBytes, err := base64.StdEncoding.DecodeString(tokens[1])
if len(tokens) < 2 {
return "", fmt.Errorf("error decoding SSH public key: %s", publicKeyString)
}
sshPublicKey, err := ssh.ParsePublicKey(sshPublicKeyBytes)
if err != nil {
return "", fmt.Errorf("error parsing SSH public key: %v", err)
}
der, err := toDER(sshPublicKey)
if err != nil {
return "", fmt.Errorf("error computing fingerprint for SSH public key: %v", err)
}
h := md5.Sum(der)
sshKeyFingerprint := fmt.Sprintf("%x", h)
var colonSeparated bytes.Buffer
for i := 0; i < len(sshKeyFingerprint); i++ {
if (i%2) == 0 && i != 0 {
colonSeparated.WriteByte(':')
}
colonSeparated.WriteByte(sshKeyFingerprint[i])
}
return colonSeparated.String(), nil
}
func (l *Loader) populateResource(rh *fi.ResourceHolder, resource fi.Resource, args []string) error {
if resource == nil {
return nil
}
if len(args) != 0 {
templateResource, ok := resource.(fi.TemplateResource)
if !ok {
return fmt.Errorf("cannot have arguments with resources of type %T", resource)
}
resource = templateResource.Curry(args)
}
rh.Resource = resource
return nil
}