107 lines
3.1 KiB
Go
107 lines
3.1 KiB
Go
package ssh
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import (
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"fmt"
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"time"
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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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const SecretDynamicKeyType = "secret_dynamic_key_type"
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func secretSSHKey(b *backend) *framework.Secret {
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return &framework.Secret{
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Type: SecretDynamicKeyType,
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Fields: map[string]*framework.FieldSchema{
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"username": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: "Username in host",
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},
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"ip": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: "ip address of host",
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},
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},
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DefaultDuration: 1 * time.Hour,
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DefaultGracePeriod: 10 * time.Minute,
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Renew: b.secretSSHKeyRenew,
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Revoke: b.secretSSHKeyRevoke,
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}
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}
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func (b *backend) secretSSHKeyRenew(req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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lease, err := b.Lease(req.Storage)
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if err != nil {
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return nil, err
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}
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if lease == nil {
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lease = &configLease{Lease: 1 * time.Hour}
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}
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f := framework.LeaseExtend(lease.Lease, lease.LeaseMax, false)
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return f(req, d)
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}
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func (b *backend) secretSSHKeyRevoke(req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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usernameRaw, ok := req.Secret.InternalData["username"]
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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username, ok := usernameRaw.(string)
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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ipRaw, ok := req.Secret.InternalData["ip"]
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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ip, ok := ipRaw.(string)
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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hostKeyNameRaw, ok := req.Secret.InternalData["host_key_name"]
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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hostKeyName := hostKeyNameRaw.(string)
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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dynamicPublicKeyRaw, ok := req.Secret.InternalData["dynamic_public_key"]
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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dynamicPublicKey := dynamicPublicKeyRaw.(string)
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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portRaw, ok := req.Secret.InternalData["port"]
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if !ok {
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return nil, fmt.Errorf("secret is missing internal data")
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}
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port := portRaw.(string)
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// Fetch the host key using the key name
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hostKeyEntry, err := req.Storage.Get(fmt.Sprintf("keys/%s", hostKeyName))
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if err != nil {
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return nil, fmt.Errorf("key '%s' not found error:%s", hostKeyName, err)
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}
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var hostKey sshHostKey
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if err := hostKeyEntry.DecodeJSON(&hostKey); err != nil {
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return nil, fmt.Errorf("error reading the host key: %s", err)
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}
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// Transfer the dynamic public key to target machine and use it to remove the entry from authorized_keys file
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err = uploadPublicKeyScp(dynamicPublicKey, username, ip, port, hostKey.Key)
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if err != nil {
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return nil, fmt.Errorf("public key transfer failed: %s", err)
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}
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// Remove the public key from authorized_keys file in target machine
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err = uninstallPublicKeyInTarget(username, ip, port, hostKey.Key)
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if err != nil {
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return nil, fmt.Errorf("error removing public key from authorized_keys file in target")
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}
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return nil, nil
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}
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