91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
package ssh
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import (
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"strings"
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"github.com/hashicorp/vault/helper/salt"
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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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func Factory(conf *logical.BackendConfig) (logical.Backend, error) {
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b, err := Backend(conf)
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if err != nil {
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return nil, err
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}
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return b.Setup(conf)
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}
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func Backend(conf *logical.BackendConfig) (*framework.Backend, error) {
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salt, err := salt.NewSalt(conf.View, nil)
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if err != nil {
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return nil, err
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}
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var b backend
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b.salt = salt
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b.Backend = &framework.Backend{
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Help: strings.TrimSpace(backendHelp),
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PathsSpecial: &logical.Paths{
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Root: []string{
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"config/*",
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"keys/*",
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},
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Unauthenticated: []string{
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"verify",
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},
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},
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Paths: []*framework.Path{
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pathConfigLease(&b),
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pathKeys(&b),
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pathRoles(&b),
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pathCredsCreate(&b),
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pathLookup(&b),
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pathVerify(&b),
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},
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Secrets: []*framework.Secret{
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secretDynamicKey(&b),
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secretOTP(&b),
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},
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}
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return b.Backend, nil
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}
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type backend struct {
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*framework.Backend
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salt *salt.Salt
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}
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const backendHelp = `
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The SSH backend generates keys to eatablish SSH connection
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with remote hosts. There are two options to create the keys:
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long lived dynamic key, one time password.
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Long lived dynamic key is a rsa private key which can be used
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to login to remote host using the publickey authentication.
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There is no additional change required in the remote hosts to
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support this type of keys. But the keys generated will be valid
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as long as the lease of the key is valid. Also, logins to remote
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hosts will not be audited in vault server.
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One Time Password (OTP), on the other hand is a randomly generated
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UUID that is used to login to remote host using the keyboard-
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interactive challenge response authentication. A vault agent
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has to be installed at the remote host to support OTP. Upon
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request, vault server generates and provides the key to the
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user. During login, vault agent receives the key and verifies
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the correctness with the vault server (and hence audited). The
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server after verifying the key for the first time, deletes the
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same (and hence one-time).
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Both type of keys have a configurable lease set and are automatically
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revoked at the end of the lease.
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After mounting this backend, before generating the keys, configure
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the lease using the 'config/lease' endpoint and create roles using
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the 'roles/' endpoint.
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`
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