158 lines
3.9 KiB
Go
158 lines
3.9 KiB
Go
package postgresql
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import (
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"fmt"
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"strings"
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"time"
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"github.com/hashicorp/go-uuid"
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"github.com/hashicorp/vault/helper/strutil"
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"github.com/hashicorp/vault/logical"
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"github.com/hashicorp/vault/logical/framework"
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_ "github.com/lib/pq"
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)
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func pathRoleCreate(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: "creds/" + framework.GenericNameRegex("name"),
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Fields: map[string]*framework.FieldSchema{
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"name": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: "Name of the role.",
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},
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},
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.ReadOperation: b.pathRoleCreateRead,
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},
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HelpSynopsis: pathRoleCreateReadHelpSyn,
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HelpDescription: pathRoleCreateReadHelpDesc,
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}
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}
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func (b *backend) pathRoleCreateRead(
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req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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b.logger.Trace("postgres/pathRoleCreateRead: enter")
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defer b.logger.Trace("postgres/pathRoleCreateRead: exit")
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name := data.Get("name").(string)
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// Get the role
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b.logger.Trace("postgres/pathRoleCreateRead: getting role")
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role, err := b.Role(req.Storage, name)
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if err != nil {
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return nil, err
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}
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if role == nil {
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return logical.ErrorResponse(fmt.Sprintf("unknown role: %s", name)), nil
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}
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// Determine if we have a lease
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b.logger.Trace("postgres/pathRoleCreateRead: getting lease")
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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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// Unlike some other backends we need a lease here (can't leave as 0 and
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// let core fill it in) because Postgres also expires users as a safety
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// measure, so cannot be zero
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if lease == nil {
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lease = &configLease{
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Lease: b.System().DefaultLeaseTTL(),
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}
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}
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// Generate the username, password and expiration. PG limits user to 63 characters
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displayName := req.DisplayName
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if len(displayName) > 26 {
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displayName = displayName[:26]
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}
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userUUID, err := uuid.GenerateUUID()
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if err != nil {
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return nil, err
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}
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username := fmt.Sprintf("%s-%s", displayName, userUUID)
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if len(username) > 63 {
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username = username[:63]
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}
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password, err := uuid.GenerateUUID()
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if err != nil {
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return nil, err
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}
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expiration := time.Now().
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Add(lease.Lease).
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Format("2006-01-02 15:04:05-0700")
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// Get our handle
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b.logger.Trace("postgres/pathRoleCreateRead: getting database handle")
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db, err := b.DB(req.Storage)
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if err != nil {
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return nil, err
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}
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// Start a transaction
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b.logger.Trace("postgres/pathRoleCreateRead: starting transaction")
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tx, err := db.Begin()
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if err != nil {
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return nil, err
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}
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defer func() {
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b.logger.Trace("postgres/pathRoleCreateRead: rolling back transaction")
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tx.Rollback()
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}()
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// Execute each query
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for _, query := range strutil.ParseArbitraryStringSlice(role.SQL, ";") {
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query = strings.TrimSpace(query)
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if len(query) == 0 {
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continue
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}
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b.logger.Trace("postgres/pathRoleCreateRead: preparing statement")
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stmt, err := tx.Prepare(Query(query, map[string]string{
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"name": username,
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"password": password,
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"expiration": expiration,
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}))
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if err != nil {
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return nil, err
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}
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defer stmt.Close()
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b.logger.Trace("postgres/pathRoleCreateRead: executing statement")
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if _, err := stmt.Exec(); err != nil {
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return nil, err
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}
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}
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// Commit the transaction
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b.logger.Trace("postgres/pathRoleCreateRead: committing transaction")
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if err := tx.Commit(); err != nil {
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return nil, err
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}
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// Return the secret
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b.logger.Trace("postgres/pathRoleCreateRead: generating secret")
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resp := b.Secret(SecretCredsType).Response(map[string]interface{}{
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"username": username,
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"password": password,
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}, map[string]interface{}{
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"username": username,
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"role": name,
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})
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resp.Secret.TTL = lease.Lease
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return resp, nil
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}
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const pathRoleCreateReadHelpSyn = `
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Request database credentials for a certain role.
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`
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const pathRoleCreateReadHelpDesc = `
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This path reads database credentials for a certain role. The
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database credentials will be generated on demand and will be automatically
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revoked when the lease is up.
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`
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