91 lines
2.8 KiB
Go
91 lines
2.8 KiB
Go
package ssh
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
|
|
"github.com/hashicorp/vault/logical"
|
|
"github.com/hashicorp/vault/logical/framework"
|
|
)
|
|
|
|
func pathLookup(b *backend) *framework.Path {
|
|
return &framework.Path{
|
|
Pattern: "lookup",
|
|
Fields: map[string]*framework.FieldSchema{
|
|
"ip": &framework.FieldSchema{
|
|
Type: framework.TypeString,
|
|
Description: "[Required] IP address of remote host",
|
|
},
|
|
},
|
|
Callbacks: map[logical.Operation]framework.OperationFunc{
|
|
logical.UpdateOperation: b.pathLookupWrite,
|
|
},
|
|
HelpSynopsis: pathLookupSyn,
|
|
HelpDescription: pathLookupDesc,
|
|
}
|
|
}
|
|
|
|
func (b *backend) pathLookupWrite(req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
|
|
ipAddr := d.Get("ip").(string)
|
|
if ipAddr == "" {
|
|
return logical.ErrorResponse("Missing ip"), nil
|
|
}
|
|
ip := net.ParseIP(ipAddr)
|
|
if ip == nil {
|
|
return logical.ErrorResponse(fmt.Sprintf("Invalid IP '%s'", ip.String())), nil
|
|
}
|
|
|
|
// Get all the roles created in the backend.
|
|
keys, err := req.Storage.List("roles/")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Look for roles which has CIDR blocks that encompasses the given IP
|
|
// and create a list out of it.
|
|
var matchingRoles []string
|
|
for _, role := range keys {
|
|
if contains, _ := roleContainsIP(req.Storage, role, ip.String()); contains {
|
|
matchingRoles = append(matchingRoles, role)
|
|
}
|
|
}
|
|
|
|
// Add roles that are allowed to accept any IP address.
|
|
zeroAddressEntry, err := b.getZeroAddressRoles(req.Storage)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if zeroAddressEntry != nil {
|
|
matchingRoles = append(matchingRoles, zeroAddressEntry.Roles...)
|
|
}
|
|
|
|
// This list may potentially reveal more information than it is supposed to.
|
|
// The roles for which the client is not authorized to will also be displayed.
|
|
// However, if the client tries to use the role for which the client is not
|
|
// authenticated, it will fail. It is not a problem. In a way this can be
|
|
// viewed as a feature. The client can ask for permissions to be given for
|
|
// a specific role if things are not working!
|
|
//
|
|
// Ideally, the role names should be filtered and only the roles which
|
|
// the client is authorized to see, should be returned.
|
|
return &logical.Response{
|
|
Data: map[string]interface{}{
|
|
"roles": matchingRoles,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
const pathLookupSyn = `
|
|
List all the roles associated with the given IP address.
|
|
`
|
|
|
|
const pathLookupDesc = `
|
|
The IP address for which the key is requested, is searched in the CIDR blocks
|
|
registered with vault using the 'roles' endpoint. Keys can be generated only by
|
|
specifying the 'role' name. The roles that can be used to generate the key for
|
|
a particular IP, are listed via this endpoint. For example, if this backend is
|
|
mounted at "ssh", then "ssh/lookup" lists the roles associated with keys can be
|
|
generated for a target IP, if the CIDR block encompassing the IP is registered
|
|
with vault.
|
|
`
|