127 lines
3.2 KiB
Go
127 lines
3.2 KiB
Go
package ssh
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import (
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"fmt"
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"golang.org/x/crypto/ssh"
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"github.com/hashicorp/vault/logical"
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"github.com/hashicorp/vault/logical/framework"
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)
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type sshHostKey struct {
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Key string `json:"key"`
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}
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func pathKeys(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: "keys/" + framework.GenericNameRegex("key_name"),
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Fields: map[string]*framework.FieldSchema{
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"key_name": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: "[Required] Name of the key",
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},
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"key": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: "[Required] SSH private key with super user privileges in host",
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},
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},
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathKeysRead,
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logical.WriteOperation: b.pathKeysWrite,
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logical.DeleteOperation: b.pathKeysDelete,
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},
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HelpSynopsis: pathKeysSyn,
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HelpDescription: pathKeysDesc,
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}
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}
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func (b *backend) getKey(s logical.Storage, n string) (*sshHostKey, error) {
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entry, err := s.Get("keys/" + n)
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if err != nil {
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return nil, err
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}
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if entry == nil {
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return nil, nil
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}
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var result sshHostKey
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if err := entry.DecodeJSON(&result); err != nil {
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return nil, err
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}
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return &result, nil
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}
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func (b *backend) pathKeysRead(req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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key, err := b.getKey(req.Storage, d.Get("key_name").(string))
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if err != nil {
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return nil, err
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}
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if key == nil {
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return nil, nil
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}
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return &logical.Response{
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Data: map[string]interface{}{
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"key": key.Key,
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},
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}, nil
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}
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func (b *backend) pathKeysDelete(req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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keyName := d.Get("key_name").(string)
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keyPath := fmt.Sprintf("keys/%s", keyName)
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err := req.Storage.Delete(keyPath)
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if err != nil {
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return nil, err
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}
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return nil, nil
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}
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func (b *backend) pathKeysWrite(req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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keyName := d.Get("key_name").(string)
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if keyName == "" {
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return logical.ErrorResponse("Missing key_name"), nil
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}
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keyString := d.Get("key").(string)
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// Check if the key provided is infact a private key
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signer, err := ssh.ParsePrivateKey([]byte(keyString))
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if err != nil || signer == nil {
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return logical.ErrorResponse("Invalid key"), nil
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}
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if keyString == "" {
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return logical.ErrorResponse("Missing key"), nil
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}
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keyPath := fmt.Sprintf("keys/%s", keyName)
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// Store the key
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entry, err := logical.StorageEntryJSON(keyPath, map[string]interface{}{
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"key": keyString,
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})
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if err != nil {
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return nil, err
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}
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if err := req.Storage.Put(entry); err != nil {
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return nil, err
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}
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return nil, nil
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}
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const pathKeysSyn = `
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Register a shared private key with Vault.
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`
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const pathKeysDesc = `
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Vault uses this key to install and uninstall dynamic keys in remote hosts. This
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key should have sudoer privileges in remote hosts. This enables installing keys
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for unprivileged usernames.
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If this backend is mounted as "ssh", then the endpoint for registering shared key
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is "ssh/keys/webrack", if "webrack" is the user coined name for the key. The name
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given here can be associated with any number of roles via the endpoint "ssh/roles/".
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`
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