137 lines
3.4 KiB
Go
137 lines
3.4 KiB
Go
package mysql
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import (
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"context"
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"fmt"
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"strings"
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"github.com/hashicorp/go-secure-stdlib/strutil"
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"github.com/hashicorp/vault/sdk/framework"
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"github.com/hashicorp/vault/sdk/logical"
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)
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const SecretCredsType = "creds"
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// defaultRevocationSQL is a default SQL statement for revoking a user. Revoking
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// permissions for the user is done before the drop, because MySQL explicitly
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// documents that open user connections will not be closed. By revoking all
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// grants, at least we ensure that the open connection is useless. Dropping the
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// user will only affect the next connection.
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const defaultRevocationSQL = `
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REVOKE ALL PRIVILEGES, GRANT OPTION FROM '{{name}}'@'%';
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DROP USER '{{name}}'@'%'
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`
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func secretCreds(b *backend) *framework.Secret {
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return &framework.Secret{
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Type: SecretCredsType,
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Fields: map[string]*framework.FieldSchema{
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"username": {
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Type: framework.TypeString,
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Description: "Username",
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},
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"password": {
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Type: framework.TypeString,
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Description: "Password",
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},
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},
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Renew: b.secretCredsRenew,
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Revoke: b.secretCredsRevoke,
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}
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}
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func (b *backend) secretCredsRenew(ctx context.Context, req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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// Get the lease information
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lease, err := b.Lease(ctx, req.Storage)
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if err != nil {
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return nil, err
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}
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if lease == nil {
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lease = &configLease{}
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}
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resp := &logical.Response{Secret: req.Secret}
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resp.Secret.TTL = lease.Lease
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resp.Secret.MaxTTL = lease.LeaseMax
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return resp, nil
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}
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func (b *backend) secretCredsRevoke(ctx context.Context, req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
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var resp *logical.Response
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// Get the username from the internal data
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usernameRaw, ok := req.Secret.InternalData["username"]
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if !ok {
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return nil, fmt.Errorf("secret is missing username internal data")
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}
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username, ok := usernameRaw.(string)
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if !ok {
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return nil, fmt.Errorf("usernameRaw is not a string")
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}
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// Get our connection
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db, err := b.DB(ctx, req.Storage)
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if err != nil {
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return nil, err
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}
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roleName := ""
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roleNameRaw, ok := req.Secret.InternalData["role"]
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if ok {
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roleName = roleNameRaw.(string)
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}
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var role *roleEntry
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if roleName != "" {
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role, err = b.Role(ctx, req.Storage, roleName)
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if err != nil {
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return nil, err
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}
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}
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// Use a default SQL statement for revocation if one cannot be fetched from the role
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revocationSQL := defaultRevocationSQL
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if role != nil && role.RevocationSQL != "" {
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revocationSQL = role.RevocationSQL
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} else {
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if resp == nil {
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resp = &logical.Response{}
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}
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resp.AddWarning(fmt.Sprintf("Role %q cannot be found. Using default SQL for revoking user.", roleName))
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}
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// Start a 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 tx.Rollback()
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for _, query := range strutil.ParseArbitraryStringSlice(revocationSQL, ";") {
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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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// This is not a prepared statement because not all commands are supported
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// 1295: This command is not supported in the prepared statement protocol yet
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// Reference https://mariadb.com/kb/en/mariadb/prepare-statement/
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query = strings.ReplaceAll(query, "{{name}}", username)
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_, err = tx.Exec(query)
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if 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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if err := tx.Commit(); err != nil {
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return nil, err
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}
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return resp, nil
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}
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