111 lines
2.8 KiB
Go
111 lines
2.8 KiB
Go
package ssh
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import (
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"context"
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"fmt"
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"golang.org/x/crypto/ssh"
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"github.com/hashicorp/vault/sdk/framework"
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"github.com/hashicorp/vault/sdk/logical"
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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": {
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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": {
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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.UpdateOperation: 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(ctx context.Context, s logical.Storage, n string) (*sshHostKey, error) {
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entry, err := s.Get(ctx, "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) pathKeysDelete(ctx context.Context, 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(ctx, 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(ctx context.Context, 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(ctx, 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
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key is "ssh/keys/<name>". The name given here can be associated with any number
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of roles via the endpoint "ssh/roles/".
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`
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