97 lines
2.6 KiB
Go
97 lines
2.6 KiB
Go
package ssh
|
|
|
|
import (
|
|
"github.com/hashicorp/vault/api"
|
|
"github.com/hashicorp/vault/logical"
|
|
"github.com/hashicorp/vault/logical/framework"
|
|
)
|
|
|
|
func pathVerify(b *backend) *framework.Path {
|
|
return &framework.Path{
|
|
Pattern: "verify",
|
|
Fields: map[string]*framework.FieldSchema{
|
|
"otp": &framework.FieldSchema{
|
|
Type: framework.TypeString,
|
|
Description: "[Required] One-Time-Key that needs to be validated",
|
|
},
|
|
},
|
|
Callbacks: map[logical.Operation]framework.OperationFunc{
|
|
logical.UpdateOperation: b.pathVerifyWrite,
|
|
},
|
|
HelpSynopsis: pathVerifyHelpSyn,
|
|
HelpDescription: pathVerifyHelpDesc,
|
|
}
|
|
}
|
|
|
|
func (b *backend) getOTP(s logical.Storage, n string) (*sshOTP, error) {
|
|
entry, err := s.Get("otp/" + n)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if entry == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
var result sshOTP
|
|
if err := entry.DecodeJSON(&result); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &result, nil
|
|
}
|
|
|
|
func (b *backend) pathVerifyWrite(req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
|
|
otp := d.Get("otp").(string)
|
|
|
|
// If OTP is not a UUID and a string matching VerifyEchoRequest, then the
|
|
// response will be VerifyEchoResponse. This is used by agent to check if
|
|
// connection to Vault server is proper.
|
|
if otp == api.VerifyEchoRequest {
|
|
return &logical.Response{
|
|
Data: map[string]interface{}{
|
|
"message": api.VerifyEchoResponse,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
// Create the salt of OTP because entry would have been create with the
|
|
// salt and not directly of the OTP. Salt will yield the same value which
|
|
// because the seed is the same, the backend salt.
|
|
otpSalted := b.salt.SaltID(otp)
|
|
|
|
// Return nil if there is no entry found for the OTP
|
|
otpEntry, err := b.getOTP(req.Storage, otpSalted)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if otpEntry == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
// Delete the OTP if found. This is what makes the key an OTP.
|
|
err = req.Storage.Delete("otp/" + otpSalted)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Return username and IP only if there were no problems uptill this point.
|
|
return &logical.Response{
|
|
Data: map[string]interface{}{
|
|
"username": otpEntry.Username,
|
|
"ip": otpEntry.IP,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
const pathVerifyHelpSyn = `
|
|
Validate the OTP provided by Vault SSH Agent.
|
|
`
|
|
|
|
const pathVerifyHelpDesc = `
|
|
This path will be used by Vault SSH Agent runnin in the remote hosts. The OTP
|
|
provided by the client is sent to Vault for validation by the agent. If Vault
|
|
finds an entry for the OTP, it responds with the username and IP it is associated
|
|
with. Agent uses this information to authenticate the client. Vault deletes the
|
|
OTP after validating it once.
|
|
`
|