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path_login.go
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/
path_login.go
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package github
import (
"context"
"fmt"
"net/url"
"strings"
"github.com/google/go-github/github"
"github.com/hashicorp/errwrap"
"github.com/hashicorp/vault/helper/policyutil"
"github.com/hashicorp/vault/logical"
"github.com/hashicorp/vault/logical/framework"
)
func pathLogin(b *backend) *framework.Path {
return &framework.Path{
Pattern: "login",
Fields: map[string]*framework.FieldSchema{
"token": &framework.FieldSchema{
Type: framework.TypeString,
Description: "GitHub personal API token",
},
},
Callbacks: map[logical.Operation]framework.OperationFunc{
logical.UpdateOperation: b.pathLogin,
logical.AliasLookaheadOperation: b.pathLoginAliasLookahead,
},
}
}
func (b *backend) pathLoginAliasLookahead(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
token := data.Get("token").(string)
var verifyResp *verifyCredentialsResp
if verifyResponse, resp, err := b.verifyCredentials(ctx, req, token); err != nil {
return nil, err
} else if resp != nil {
return resp, nil
} else {
verifyResp = verifyResponse
}
return &logical.Response{
Auth: &logical.Auth{
Alias: &logical.Alias{
Name: *verifyResp.User.Login,
},
},
}, nil
}
func (b *backend) pathLogin(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
token := data.Get("token").(string)
var verifyResp *verifyCredentialsResp
if verifyResponse, resp, err := b.verifyCredentials(ctx, req, token); err != nil {
return nil, err
} else if resp != nil {
return resp, nil
} else {
verifyResp = verifyResponse
}
config, err := b.Config(ctx, req.Storage)
if err != nil {
return nil, err
}
resp := &logical.Response{
Auth: &logical.Auth{
InternalData: map[string]interface{}{
"token": token,
},
Policies: verifyResp.Policies,
Metadata: map[string]string{
"username": *verifyResp.User.Login,
"org": *verifyResp.Org.Login,
},
DisplayName: *verifyResp.User.Login,
LeaseOptions: logical.LeaseOptions{
TTL: config.TTL,
MaxTTL: config.MaxTTL,
Renewable: true,
},
Alias: &logical.Alias{
Name: *verifyResp.User.Login,
},
},
}
for _, teamName := range verifyResp.TeamNames {
if teamName == "" {
continue
}
resp.Auth.GroupAliases = append(resp.Auth.GroupAliases, &logical.Alias{
Name: teamName,
})
}
return resp, nil
}
func (b *backend) pathLoginRenew(ctx context.Context, req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
if req.Auth == nil {
return nil, fmt.Errorf("request auth was nil")
}
tokenRaw, ok := req.Auth.InternalData["token"]
if !ok {
return nil, fmt.Errorf("token created in previous version of Vault cannot be validated properly at renewal time")
}
token := tokenRaw.(string)
var verifyResp *verifyCredentialsResp
if verifyResponse, resp, err := b.verifyCredentials(ctx, req, token); err != nil {
return nil, err
} else if resp != nil {
return resp, nil
} else {
verifyResp = verifyResponse
}
if !policyutil.EquivalentPolicies(verifyResp.Policies, req.Auth.TokenPolicies) {
return nil, fmt.Errorf("policies do not match")
}
config, err := b.Config(ctx, req.Storage)
if err != nil {
return nil, err
}
resp := &logical.Response{Auth: req.Auth}
resp.Auth.TTL = config.TTL
resp.Auth.MaxTTL = config.MaxTTL
// Remove old aliases
resp.Auth.GroupAliases = nil
for _, teamName := range verifyResp.TeamNames {
resp.Auth.GroupAliases = append(resp.Auth.GroupAliases, &logical.Alias{
Name: teamName,
})
}
return resp, nil
}
func (b *backend) verifyCredentials(ctx context.Context, req *logical.Request, token string) (*verifyCredentialsResp, *logical.Response, error) {
config, err := b.Config(ctx, req.Storage)
if err != nil {
return nil, nil, err
}
if config.Organization == "" {
return nil, logical.ErrorResponse(
"configure the github credential backend first"), nil
}
client, err := b.Client(token)
if err != nil {
return nil, nil, err
}
if config.BaseURL != "" {
parsedURL, err := url.Parse(config.BaseURL)
if err != nil {
return nil, nil, errwrap.Wrapf("successfully parsed base_url when set but failing to parse now: {{err}}", err)
}
client.BaseURL = parsedURL
}
// Get the user
user, _, err := client.Users.Get(ctx, "")
if err != nil {
return nil, nil, err
}
// Verify that the user is part of the organization
var org *github.Organization
orgOpt := &github.ListOptions{
PerPage: 100,
}
var allOrgs []*github.Organization
for {
orgs, resp, err := client.Organizations.List(ctx, "", orgOpt)
if err != nil {
return nil, nil, err
}
allOrgs = append(allOrgs, orgs...)
if resp.NextPage == 0 {
break
}
orgOpt.Page = resp.NextPage
}
for _, o := range allOrgs {
if strings.EqualFold(*o.Login, config.Organization) {
org = o
break
}
}
if org == nil {
return nil, logical.ErrorResponse("user is not part of required org"), nil
}
// Get the teams that this user is part of to determine the policies
var teamNames []string
teamOpt := &github.ListOptions{
PerPage: 100,
}
var allTeams []*github.Team
for {
teams, resp, err := client.Organizations.ListUserTeams(ctx, teamOpt)
if err != nil {
return nil, nil, err
}
allTeams = append(allTeams, teams...)
if resp.NextPage == 0 {
break
}
teamOpt.Page = resp.NextPage
}
for _, t := range allTeams {
// We only care about teams that are part of the organization we use
if *t.Organization.ID != *org.ID {
continue
}
// Append the names so we can get the policies
teamNames = append(teamNames, *t.Name)
if *t.Name != *t.Slug {
teamNames = append(teamNames, *t.Slug)
}
}
groupPoliciesList, err := b.TeamMap.Policies(ctx, req.Storage, teamNames...)
if err != nil {
return nil, nil, err
}
userPoliciesList, err := b.UserMap.Policies(ctx, req.Storage, []string{*user.Login}...)
if err != nil {
return nil, nil, err
}
return &verifyCredentialsResp{
User: user,
Org: org,
Policies: append(groupPoliciesList, userPoliciesList...),
TeamNames: teamNames,
}, nil, nil
}
type verifyCredentialsResp struct {
User *github.User
Org *github.Organization
Policies []string
TeamNames []string
}