292 lines
9.3 KiB
Go
292 lines
9.3 KiB
Go
package cassandra
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import (
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"context"
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"crypto/tls"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/mitchellh/mapstructure"
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"github.com/gocql/gocql"
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"github.com/hashicorp/errwrap"
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"github.com/hashicorp/vault/sdk/database/dbplugin"
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"github.com/hashicorp/vault/sdk/database/helper/connutil"
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"github.com/hashicorp/vault/sdk/database/helper/dbutil"
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"github.com/hashicorp/vault/sdk/helper/certutil"
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"github.com/hashicorp/vault/sdk/helper/parseutil"
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"github.com/hashicorp/vault/sdk/helper/tlsutil"
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)
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// cassandraConnectionProducer implements ConnectionProducer and provides an
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// interface for cassandra databases to make connections.
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type cassandraConnectionProducer struct {
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Hosts string `json:"hosts" structs:"hosts" mapstructure:"hosts"`
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Port int `json:"port" structs:"port" mapstructure:"port"`
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Username string `json:"username" structs:"username" mapstructure:"username"`
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Password string `json:"password" structs:"password" mapstructure:"password"`
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TLS bool `json:"tls" structs:"tls" mapstructure:"tls"`
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InsecureTLS bool `json:"insecure_tls" structs:"insecure_tls" mapstructure:"insecure_tls"`
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ProtocolVersion int `json:"protocol_version" structs:"protocol_version" mapstructure:"protocol_version"`
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ConnectTimeoutRaw interface{} `json:"connect_timeout" structs:"connect_timeout" mapstructure:"connect_timeout"`
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SocketKeepAliveRaw interface{} `json:"socket_keep_alive" structs:"socket_keep_alive" mapstructure:"socket_keep_alive"`
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TLSMinVersion string `json:"tls_min_version" structs:"tls_min_version" mapstructure:"tls_min_version"`
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Consistency string `json:"consistency" structs:"consistency" mapstructure:"consistency"`
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LocalDatacenter string `json:"local_datacenter" structs:"local_datacenter" mapstructure:"local_datacenter"`
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PemBundle string `json:"pem_bundle" structs:"pem_bundle" mapstructure:"pem_bundle"`
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PemJSON string `json:"pem_json" structs:"pem_json" mapstructure:"pem_json"`
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connectTimeout time.Duration
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socketKeepAlive time.Duration
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certificate string
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privateKey string
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issuingCA string
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rawConfig map[string]interface{}
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Initialized bool
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Type string
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session *gocql.Session
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sync.Mutex
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}
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func (c *cassandraConnectionProducer) Initialize(ctx context.Context, conf map[string]interface{}, verifyConnection bool) error {
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_, err := c.Init(ctx, conf, verifyConnection)
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return err
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}
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func (c *cassandraConnectionProducer) Init(ctx context.Context, conf map[string]interface{}, verifyConnection bool) (map[string]interface{}, error) {
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c.Lock()
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defer c.Unlock()
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c.rawConfig = conf
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err := mapstructure.WeakDecode(conf, c)
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if err != nil {
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return nil, err
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}
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if c.ConnectTimeoutRaw == nil {
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c.ConnectTimeoutRaw = "0s"
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}
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c.connectTimeout, err = parseutil.ParseDurationSecond(c.ConnectTimeoutRaw)
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if err != nil {
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return nil, errwrap.Wrapf("invalid connect_timeout: {{err}}", err)
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}
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if c.SocketKeepAliveRaw == nil {
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c.SocketKeepAliveRaw = "0s"
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}
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c.socketKeepAlive, err = parseutil.ParseDurationSecond(c.SocketKeepAliveRaw)
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if err != nil {
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return nil, errwrap.Wrapf("invalid socket_keep_alive: {{err}}", err)
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}
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switch {
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case len(c.Hosts) == 0:
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return nil, fmt.Errorf("hosts cannot be empty")
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case len(c.Username) == 0:
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return nil, fmt.Errorf("username cannot be empty")
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case len(c.Password) == 0:
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return nil, fmt.Errorf("password cannot be empty")
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}
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var certBundle *certutil.CertBundle
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var parsedCertBundle *certutil.ParsedCertBundle
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switch {
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case len(c.PemJSON) != 0:
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parsedCertBundle, err = certutil.ParsePKIJSON([]byte(c.PemJSON))
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if err != nil {
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return nil, errwrap.Wrapf("could not parse given JSON; it must be in the format of the output of the PKI backend certificate issuing command: {{err}}", err)
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}
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certBundle, err = parsedCertBundle.ToCertBundle()
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if err != nil {
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return nil, errwrap.Wrapf("Error marshaling PEM information: {{err}}", err)
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}
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c.certificate = certBundle.Certificate
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c.privateKey = certBundle.PrivateKey
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c.issuingCA = certBundle.IssuingCA
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c.TLS = true
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case len(c.PemBundle) != 0:
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parsedCertBundle, err = certutil.ParsePEMBundle(c.PemBundle)
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if err != nil {
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return nil, errwrap.Wrapf("Error parsing the given PEM information: {{err}}", err)
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}
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certBundle, err = parsedCertBundle.ToCertBundle()
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if err != nil {
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return nil, errwrap.Wrapf("Error marshaling PEM information: {{err}}", err)
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}
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c.certificate = certBundle.Certificate
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c.privateKey = certBundle.PrivateKey
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c.issuingCA = certBundle.IssuingCA
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c.TLS = true
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}
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// Set initialized to true at this point since all fields are set,
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// and the connection can be established at a later time.
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c.Initialized = true
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if verifyConnection {
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if _, err := c.Connection(ctx); err != nil {
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return nil, errwrap.Wrapf("error verifying connection: {{err}}", err)
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}
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}
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return conf, nil
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}
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func (c *cassandraConnectionProducer) Connection(ctx context.Context) (interface{}, error) {
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if !c.Initialized {
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return nil, connutil.ErrNotInitialized
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}
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// If we already have a DB, return it
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if c.session != nil && !c.session.Closed() {
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return c.session, nil
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}
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session, err := c.createSession(ctx)
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if err != nil {
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return nil, err
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}
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// Store the session in backend for reuse
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c.session = session
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return session, nil
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}
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func (c *cassandraConnectionProducer) Close() error {
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// Grab the write lock
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c.Lock()
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defer c.Unlock()
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if c.session != nil {
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c.session.Close()
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}
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c.session = nil
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return nil
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}
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func (c *cassandraConnectionProducer) createSession(ctx context.Context) (*gocql.Session, error) {
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hosts := strings.Split(c.Hosts, ",")
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clusterConfig := gocql.NewCluster(hosts...)
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clusterConfig.Authenticator = gocql.PasswordAuthenticator{
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Username: c.Username,
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Password: c.Password,
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}
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if c.Port != 0 {
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clusterConfig.Port = c.Port
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}
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clusterConfig.ProtoVersion = c.ProtocolVersion
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if clusterConfig.ProtoVersion == 0 {
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clusterConfig.ProtoVersion = 2
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}
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clusterConfig.Timeout = c.connectTimeout
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clusterConfig.SocketKeepalive = c.socketKeepAlive
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if c.TLS {
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var tlsConfig *tls.Config
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if len(c.certificate) > 0 || len(c.issuingCA) > 0 {
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if len(c.certificate) > 0 && len(c.privateKey) == 0 {
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return nil, fmt.Errorf("found certificate for TLS authentication but no private key")
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}
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certBundle := &certutil.CertBundle{}
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if len(c.certificate) > 0 {
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certBundle.Certificate = c.certificate
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certBundle.PrivateKey = c.privateKey
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}
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if len(c.issuingCA) > 0 {
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certBundle.IssuingCA = c.issuingCA
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}
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parsedCertBundle, err := certBundle.ToParsedCertBundle()
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if err != nil {
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return nil, errwrap.Wrapf("failed to parse certificate bundle: {{err}}", err)
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}
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tlsConfig, err = parsedCertBundle.GetTLSConfig(certutil.TLSClient)
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if err != nil || tlsConfig == nil {
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return nil, errwrap.Wrapf(fmt.Sprintf("failed to get TLS configuration: tlsConfig:%#v err:{{err}}", tlsConfig), err)
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}
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tlsConfig.InsecureSkipVerify = c.InsecureTLS
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if c.TLSMinVersion != "" {
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var ok bool
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tlsConfig.MinVersion, ok = tlsutil.TLSLookup[c.TLSMinVersion]
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if !ok {
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return nil, fmt.Errorf("invalid 'tls_min_version' in config")
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}
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} else {
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// MinVersion was not being set earlier. Reset it to
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// zero to gracefully handle upgrades.
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tlsConfig.MinVersion = 0
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}
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}
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clusterConfig.SslOpts = &gocql.SslOptions{
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Config: tlsConfig,
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}
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}
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if c.LocalDatacenter != "" {
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clusterConfig.PoolConfig.HostSelectionPolicy = gocql.DCAwareRoundRobinPolicy(c.LocalDatacenter)
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}
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session, err := clusterConfig.CreateSession()
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if err != nil {
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return nil, errwrap.Wrapf("error creating session: {{err}}", err)
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}
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// Set consistency
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if c.Consistency != "" {
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consistencyValue, err := gocql.ParseConsistencyWrapper(c.Consistency)
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if err != nil {
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return nil, err
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}
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session.SetConsistency(consistencyValue)
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}
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// Verify the info
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err = session.Query(`LIST ALL`).WithContext(ctx).Exec()
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if err != nil && len(c.Username) != 0 && strings.Contains(err.Error(), "not authorized") {
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rowNum := session.Query(dbutil.QueryHelper(`LIST CREATE ON ALL ROLES OF '{{username}}';`, map[string]string{
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"username": c.Username,
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})).Iter().NumRows()
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if rowNum < 1 {
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return nil, errwrap.Wrapf("error validating connection info: No role create permissions found, previous error: {{err}}", err)
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}
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} else if err != nil {
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return nil, errwrap.Wrapf("error validating connection info: {{err}}", err)
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}
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return session, nil
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}
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func (c *cassandraConnectionProducer) secretValues() map[string]interface{} {
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return map[string]interface{}{
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c.Password: "[password]",
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c.PemBundle: "[pem_bundle]",
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c.PemJSON: "[pem_json]",
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}
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}
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// SetCredentials uses provided information to set/create a user in the
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// database. Unlike CreateUser, this method requires a username be provided and
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// uses the name given, instead of generating a name. This is used for creating
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// and setting the password of static accounts, as well as rolling back
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// passwords in the database in the event an updated database fails to save in
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// Vault's storage.
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func (c *cassandraConnectionProducer) SetCredentials(ctx context.Context, statements dbplugin.Statements, staticUser dbplugin.StaticUserConfig) (username, password string, err error) {
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return "", "", dbutil.Unimplemented()
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}
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