250 lines
7.5 KiB
Go
250 lines
7.5 KiB
Go
package database
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import (
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"context"
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"fmt"
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"time"
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"github.com/hashicorp/go-secure-stdlib/strutil"
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v5 "github.com/hashicorp/vault/sdk/database/dbplugin/v5"
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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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func pathCredsCreate(b *databaseBackend) []*framework.Path {
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return []*framework.Path{
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{
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Pattern: "creds/" + framework.GenericNameRegex("name"),
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Fields: map[string]*framework.FieldSchema{
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"name": {
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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.pathCredsCreateRead(),
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},
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HelpSynopsis: pathCredsCreateReadHelpSyn,
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HelpDescription: pathCredsCreateReadHelpDesc,
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},
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{
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Pattern: "static-creds/" + framework.GenericNameRegex("name"),
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Fields: map[string]*framework.FieldSchema{
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"name": {
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Type: framework.TypeString,
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Description: "Name of the static 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.pathStaticCredsRead(),
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},
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HelpSynopsis: pathStaticCredsReadHelpSyn,
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HelpDescription: pathStaticCredsReadHelpDesc,
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},
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}
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}
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func (b *databaseBackend) pathCredsCreateRead() framework.OperationFunc {
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return func(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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name := data.Get("name").(string)
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// Get the role
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role, err := b.Role(ctx, 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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dbConfig, err := b.DatabaseConfig(ctx, req.Storage, role.DBName)
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if err != nil {
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return nil, err
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}
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// If role name isn't in the database's allowed roles, send back a
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// permission denied.
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if !strutil.StrListContains(dbConfig.AllowedRoles, "*") && !strutil.StrListContainsGlob(dbConfig.AllowedRoles, name) {
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return nil, fmt.Errorf("%q is not an allowed role", name)
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}
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// If the plugin doesn't support the credential type, return an error
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if !dbConfig.SupportsCredentialType(role.CredentialType) {
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return logical.ErrorResponse("unsupported credential_type: %q",
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role.CredentialType.String()), nil
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}
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// Get the Database object
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dbi, err := b.GetConnection(ctx, req.Storage, role.DBName)
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if err != nil {
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return nil, err
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}
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dbi.RLock()
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defer dbi.RUnlock()
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ttl, _, err := framework.CalculateTTL(b.System(), 0, role.DefaultTTL, 0, role.MaxTTL, 0, time.Time{})
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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().Add(ttl)
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// Adding a small buffer since the TTL will be calculated again after this call
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// to ensure the database credential does not expire before the lease
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expiration = expiration.Add(5 * time.Second)
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newUserReq := v5.NewUserRequest{
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UsernameConfig: v5.UsernameMetadata{
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DisplayName: req.DisplayName,
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RoleName: name,
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},
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Statements: v5.Statements{
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Commands: role.Statements.Creation,
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},
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RollbackStatements: v5.Statements{
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Commands: role.Statements.Rollback,
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},
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Expiration: expiration,
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}
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respData := make(map[string]interface{})
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// Generate the credential based on the role's credential type
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switch role.CredentialType {
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case v5.CredentialTypePassword:
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generator, err := newPasswordGenerator(role.CredentialConfig)
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if err != nil {
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return nil, fmt.Errorf("failed to construct credential generator: %s", err)
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}
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// Fall back to database config-level password policy if not set on role
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if generator.PasswordPolicy == "" {
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generator.PasswordPolicy = dbConfig.PasswordPolicy
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}
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// Generate the password
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password, err := generator.generate(ctx, b, dbi.database)
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if err != nil {
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b.CloseIfShutdown(dbi, err)
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return nil, fmt.Errorf("failed to generate password: %s", err)
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}
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// Set input credential
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newUserReq.CredentialType = v5.CredentialTypePassword
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newUserReq.Password = password
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case v5.CredentialTypeRSAPrivateKey:
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generator, err := newRSAKeyGenerator(role.CredentialConfig)
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if err != nil {
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return nil, fmt.Errorf("failed to construct credential generator: %s", err)
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}
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// Generate the RSA key pair
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public, private, err := generator.generate(b.GetRandomReader())
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if err != nil {
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return nil, fmt.Errorf("failed to generate RSA key pair: %s", err)
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}
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// Set input credential
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newUserReq.CredentialType = v5.CredentialTypeRSAPrivateKey
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newUserReq.PublicKey = public
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// Set output credential
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respData["rsa_private_key"] = string(private)
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}
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// Overwriting the password in the event this is a legacy database
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// plugin and the provided password is ignored
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newUserResp, password, err := dbi.database.NewUser(ctx, newUserReq)
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if err != nil {
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b.CloseIfShutdown(dbi, err)
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return nil, err
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}
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respData["username"] = newUserResp.Username
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// Database plugins using the v4 interface generate and return the password.
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// Set the password response to what is returned by the NewUser request.
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if role.CredentialType == v5.CredentialTypePassword {
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respData["password"] = password
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}
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internal := map[string]interface{}{
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"username": newUserResp.Username,
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"role": name,
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"db_name": role.DBName,
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"revocation_statements": role.Statements.Revocation,
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}
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resp := b.Secret(SecretCredsType).Response(respData, internal)
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resp.Secret.TTL = role.DefaultTTL
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resp.Secret.MaxTTL = role.MaxTTL
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return resp, nil
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}
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}
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func (b *databaseBackend) pathStaticCredsRead() framework.OperationFunc {
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return func(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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name := data.Get("name").(string)
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role, err := b.StaticRole(ctx, 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("unknown role: %s", name), nil
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}
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dbConfig, err := b.DatabaseConfig(ctx, req.Storage, role.DBName)
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if err != nil {
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return nil, err
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}
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// If role name isn't in the database's allowed roles, send back a
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// permission denied.
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if !strutil.StrListContains(dbConfig.AllowedRoles, "*") && !strutil.StrListContainsGlob(dbConfig.AllowedRoles, name) {
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return nil, fmt.Errorf("%q is not an allowed role", name)
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}
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respData := map[string]interface{}{
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"username": role.StaticAccount.Username,
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"ttl": role.StaticAccount.CredentialTTL().Seconds(),
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"rotation_period": role.StaticAccount.RotationPeriod.Seconds(),
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"last_vault_rotation": role.StaticAccount.LastVaultRotation,
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}
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switch role.CredentialType {
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case v5.CredentialTypePassword:
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respData["password"] = role.StaticAccount.Password
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case v5.CredentialTypeRSAPrivateKey:
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respData["rsa_private_key"] = string(role.StaticAccount.PrivateKey)
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}
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return &logical.Response{
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Data: respData,
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}, nil
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}
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}
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const pathCredsCreateReadHelpSyn = `
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Request database credentials for a certain role.
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`
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const pathCredsCreateReadHelpDesc = `
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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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const pathStaticCredsReadHelpSyn = `
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Request database credentials for a certain static role. These credentials are
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rotated periodically.
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`
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const pathStaticCredsReadHelpDesc = `
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This path reads database credentials for a certain static role. The database
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credentials are rotated periodically according to their configuration, and will
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return the same password until they are rotated.
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`
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