128 lines
3.9 KiB
Go
128 lines
3.9 KiB
Go
package mssql
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import (
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"context"
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"database/sql"
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"fmt"
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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 pathConfigConnection(b *backend) *framework.Path {
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return &framework.Path{
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Pattern: "config/connection",
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Fields: map[string]*framework.FieldSchema{
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"connection_string": &framework.FieldSchema{
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Type: framework.TypeString,
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Description: "DB connection parameters",
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},
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"max_open_connections": &framework.FieldSchema{
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Type: framework.TypeInt,
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Description: "Maximum number of open connections to database",
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},
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"verify_connection": &framework.FieldSchema{
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Type: framework.TypeBool,
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Default: true,
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Description: "If set, connection_string is verified by actually connecting to the database",
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},
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},
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Callbacks: map[logical.Operation]framework.OperationFunc{
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logical.UpdateOperation: b.pathConnectionWrite,
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logical.ReadOperation: b.pathConnectionRead,
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},
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HelpSynopsis: pathConfigConnectionHelpSyn,
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HelpDescription: pathConfigConnectionHelpDesc,
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}
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}
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// pathConnectionRead reads out the connection configuration
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func (b *backend) pathConnectionRead(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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entry, err := req.Storage.Get(ctx, "config/connection")
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if err != nil {
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return nil, fmt.Errorf("failed to read connection configuration")
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}
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if entry == nil {
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return nil, nil
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}
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var config connectionConfig
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if err := entry.DecodeJSON(&config); err != nil {
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return nil, err
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}
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return &logical.Response{
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Data: map[string]interface{}{
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"max_open_connections": config.MaxOpenConnections,
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},
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}, nil
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}
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// pathConnectionWrite stores the connection configuration
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func (b *backend) pathConnectionWrite(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) {
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connString := data.Get("connection_string").(string)
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maxOpenConns := data.Get("max_open_connections").(int)
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if maxOpenConns == 0 {
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maxOpenConns = 2
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}
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// Don't check the connection_string if verification is disabled
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verifyConnection := data.Get("verify_connection").(bool)
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if verifyConnection {
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// Verify the string
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db, err := sql.Open("mssql", connString)
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if err != nil {
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return logical.ErrorResponse(fmt.Sprintf(
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"Error validating connection info: %s", err)), nil
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}
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defer db.Close()
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if err := db.Ping(); err != nil {
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return logical.ErrorResponse(fmt.Sprintf(
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"Error validating connection info: %s", err)), nil
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}
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}
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// Store it
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entry, err := logical.StorageEntryJSON("config/connection", connectionConfig{
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ConnectionString: connString,
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MaxOpenConnections: maxOpenConns,
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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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if err := req.Storage.Put(ctx, entry); err != nil {
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return nil, err
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}
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// Reset the DB connection
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b.ResetDB(ctx)
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resp := &logical.Response{}
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resp.AddWarning("Read access to this endpoint should be controlled via ACLs as it will return the connection string as it is, including passwords, if any.")
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return resp, nil
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}
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type connectionConfig struct {
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ConnectionString string `json:"connection_string" structs:"connection_string" mapstructure:"connection_string"`
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MaxOpenConnections int `json:"max_open_connections" structs:"max_open_connections" mapstructure:"max_open_connections"`
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}
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const pathConfigConnectionHelpSyn = `
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Configure the connection string to talk to Microsoft Sql Server.
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`
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const pathConfigConnectionHelpDesc = `
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This path configures the connection string used to connect to Sql Server.
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The value of the string is a Data Source Name (DSN). An example is
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using "server=<hostname>;port=<port>;user id=<username>;password=<password>;database=<database>;app name=vault;"
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When configuring the connection string, the backend will verify its validity.
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If the database is not available when setting the connection string, set the
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"verify_connection" option to false.
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`
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