mirror of
https://github.com/netbirdio/netbird.git
synced 2024-12-15 03:11:02 +01:00
298 lines
9.0 KiB
Go
298 lines
9.0 KiB
Go
package migration
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import (
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"context"
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"crypto/sha256"
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"database/sql"
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b64 "encoding/base64"
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"encoding/gob"
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"encoding/json"
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"errors"
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"fmt"
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"net"
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"strings"
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"unicode/utf8"
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log "github.com/sirupsen/logrus"
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"gorm.io/gorm"
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)
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// MigrateFieldFromGobToJSON migrates a column from Gob encoding to JSON encoding.
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// T is the type of the model that contains the field to be migrated.
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// S is the type of the field to be migrated.
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func MigrateFieldFromGobToJSON[T any, S any](ctx context.Context, db *gorm.DB, fieldName string) error {
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oldColumnName := fieldName
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newColumnName := fieldName + "_tmp"
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var model T
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if !db.Migrator().HasTable(&model) {
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log.WithContext(ctx).Debugf("Table for %T does not exist, no migration needed", model)
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return nil
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}
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stmt := &gorm.Statement{DB: db}
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err := stmt.Parse(model)
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if err != nil {
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return fmt.Errorf("parse model: %w", err)
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}
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tableName := stmt.Schema.Table
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var sqliteItem sql.NullString
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if err := db.Model(model).Select(oldColumnName).First(&sqliteItem).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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log.WithContext(ctx).Debugf("No records in table %s, no migration needed", tableName)
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return nil
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}
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return fmt.Errorf("fetch first record: %w", err)
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}
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item := sqliteItem.String
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var js json.RawMessage
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var syntaxError *json.SyntaxError
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err = json.Unmarshal([]byte(item), &js)
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// if the item is JSON parsable or an empty string it can not be gob encoded
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if err == nil || !errors.As(err, &syntaxError) || item == "" {
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log.WithContext(ctx).Debugf("No migration needed for %s, %s", tableName, fieldName)
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return nil
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}
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if err := db.Transaction(func(tx *gorm.DB) error {
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if err := tx.Exec(fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s TEXT", tableName, newColumnName)).Error; err != nil {
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return fmt.Errorf("add column %s: %w", newColumnName, err)
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}
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var rows []map[string]any
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if err := tx.Table(tableName).Select("id", oldColumnName).Find(&rows).Error; err != nil {
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return fmt.Errorf("find rows: %w", err)
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}
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for _, row := range rows {
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var field S
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str, ok := row[oldColumnName].(string)
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if !ok {
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return fmt.Errorf("type assertion failed")
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}
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reader := strings.NewReader(str)
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if err := gob.NewDecoder(reader).Decode(&field); err != nil {
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return fmt.Errorf("gob decode error: %w", err)
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}
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jsonValue, err := json.Marshal(field)
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if err != nil {
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return fmt.Errorf("re-encode to JSON: %w", err)
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}
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if err := tx.Table(tableName).Where("id = ?", row["id"]).Update(newColumnName, jsonValue).Error; err != nil {
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return fmt.Errorf("update row: %w", err)
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}
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}
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if err := tx.Exec(fmt.Sprintf("ALTER TABLE %s DROP COLUMN %s", tableName, oldColumnName)).Error; err != nil {
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return fmt.Errorf("drop column %s: %w", oldColumnName, err)
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}
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if err := tx.Exec(fmt.Sprintf("ALTER TABLE %s RENAME COLUMN %s TO %s", tableName, newColumnName, oldColumnName)).Error; err != nil {
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return fmt.Errorf("rename column %s to %s: %w", newColumnName, oldColumnName, err)
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}
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return nil
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}); err != nil {
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return err
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}
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log.WithContext(ctx).Infof("Migration of %s.%s from gob to json completed", tableName, fieldName)
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return nil
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}
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// MigrateNetIPFieldFromBlobToJSON migrates a Net IP column from Blob encoding to JSON encoding.
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// T is the type of the model that contains the field to be migrated.
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func MigrateNetIPFieldFromBlobToJSON[T any](ctx context.Context, db *gorm.DB, fieldName string, indexName string) error {
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oldColumnName := fieldName
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newColumnName := fieldName + "_tmp"
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var model T
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if !db.Migrator().HasTable(&model) {
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log.Printf("Table for %T does not exist, no migration needed", model)
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return nil
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}
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stmt := &gorm.Statement{DB: db}
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err := stmt.Parse(&model)
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if err != nil {
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return fmt.Errorf("parse model: %w", err)
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}
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tableName := stmt.Schema.Table
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var item sql.NullString
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if err := db.Model(&model).Select(oldColumnName).First(&item).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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log.Printf("No records in table %s, no migration needed", tableName)
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return nil
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}
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return fmt.Errorf("fetch first record: %w", err)
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}
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if item.Valid {
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var js json.RawMessage
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var syntaxError *json.SyntaxError
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err = json.Unmarshal([]byte(item.String), &js)
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if err == nil || !errors.As(err, &syntaxError) {
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log.WithContext(ctx).Debugf("No migration needed for %s, %s", tableName, fieldName)
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return nil
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}
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}
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if err := db.Transaction(func(tx *gorm.DB) error {
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if err := tx.Exec(fmt.Sprintf("ALTER TABLE %s ADD COLUMN %s TEXT", tableName, newColumnName)).Error; err != nil {
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return fmt.Errorf("add column %s: %w", newColumnName, err)
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}
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var rows []map[string]any
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if err := tx.Table(tableName).Select("id", oldColumnName).Find(&rows).Error; err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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log.Printf("No records in table %s, no migration needed", tableName)
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return nil
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}
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return fmt.Errorf("find rows: %w", err)
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}
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for _, row := range rows {
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var blobValue string
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if columnValue := row[oldColumnName]; columnValue != nil {
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value, ok := columnValue.(string)
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if !ok {
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return fmt.Errorf("type assertion failed")
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}
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blobValue = value
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}
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columnIpValue := net.IP(blobValue)
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if net.ParseIP(columnIpValue.String()) == nil {
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log.WithContext(ctx).Debugf("failed to parse %s as ip, fallback to ipv6 loopback", oldColumnName)
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columnIpValue = net.IPv6loopback
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}
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jsonValue, err := json.Marshal(columnIpValue)
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if err != nil {
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return fmt.Errorf("re-encode to JSON: %w", err)
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}
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if err := tx.Table(tableName).Where("id = ?", row["id"]).Update(newColumnName, jsonValue).Error; err != nil {
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return fmt.Errorf("update row: %w", err)
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}
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}
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if indexName != "" {
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if err := tx.Migrator().DropIndex(&model, indexName); err != nil {
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return fmt.Errorf("drop index %s: %w", indexName, err)
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}
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}
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if err := tx.Exec(fmt.Sprintf("ALTER TABLE %s DROP COLUMN %s", tableName, oldColumnName)).Error; err != nil {
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return fmt.Errorf("drop column %s: %w", oldColumnName, err)
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}
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if err := tx.Exec(fmt.Sprintf("ALTER TABLE %s RENAME COLUMN %s TO %s", tableName, newColumnName, oldColumnName)).Error; err != nil {
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return fmt.Errorf("rename column %s to %s: %w", newColumnName, oldColumnName, err)
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}
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return nil
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}); err != nil {
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return err
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}
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log.Printf("Migration of %s.%s from blob to json completed", tableName, fieldName)
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return nil
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}
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func MigrateSetupKeyToHashedSetupKey[T any](ctx context.Context, db *gorm.DB) error {
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oldColumnName := "key"
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newColumnName := "key_secret"
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var model T
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if !db.Migrator().HasTable(&model) {
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log.WithContext(ctx).Debugf("Table for %T does not exist, no migration needed", model)
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return nil
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}
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stmt := &gorm.Statement{DB: db}
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err := stmt.Parse(&model)
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if err != nil {
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return fmt.Errorf("parse model: %w", err)
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}
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tableName := stmt.Schema.Table
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if err := db.Transaction(func(tx *gorm.DB) error {
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if !tx.Migrator().HasColumn(&model, newColumnName) {
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log.WithContext(ctx).Infof("Column %s does not exist in table %s, adding it", newColumnName, tableName)
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if err := tx.Migrator().AddColumn(&model, newColumnName); err != nil {
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return fmt.Errorf("add column %s: %w", newColumnName, err)
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}
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}
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var rows []map[string]any
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if err := tx.Table(tableName).
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Select("id", oldColumnName, newColumnName).
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Where(newColumnName + " IS NULL OR " + newColumnName + " = ''").
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Where("SUBSTR(" + oldColumnName + ", 9, 1) = '-'").
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Find(&rows).Error; err != nil {
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return fmt.Errorf("find rows with empty secret key and matching pattern: %w", err)
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}
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if len(rows) == 0 {
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log.WithContext(ctx).Infof("No plain setup keys found in table %s, no migration needed", tableName)
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return nil
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}
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for _, row := range rows {
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var plainKey string
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if columnValue := row[oldColumnName]; columnValue != nil {
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value, ok := columnValue.(string)
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if !ok {
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return fmt.Errorf("type assertion failed")
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}
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plainKey = value
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}
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secretKey := hiddenKey(plainKey, 4)
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hashedKey := sha256.Sum256([]byte(plainKey))
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encodedHashedKey := b64.StdEncoding.EncodeToString(hashedKey[:])
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if err := tx.Table(tableName).Where("id = ?", row["id"]).Update(newColumnName, secretKey).Error; err != nil {
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return fmt.Errorf("update row with secret key: %w", err)
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}
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if err := tx.Table(tableName).Where("id = ?", row["id"]).Update(oldColumnName, encodedHashedKey).Error; err != nil {
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return fmt.Errorf("update row with hashed key: %w", err)
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}
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}
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if err := tx.Exec(fmt.Sprintf("ALTER TABLE %s DROP COLUMN %s", "peers", "setup_key")).Error; err != nil {
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log.WithContext(ctx).Errorf("Failed to drop column %s: %v", "setup_key", err)
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}
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return nil
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}); err != nil {
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return err
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}
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log.Printf("Migration of plain setup key to hashed setup key completed")
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return nil
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}
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// hiddenKey returns the Key value hidden with "*" and a 5 character prefix.
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// E.g., "831F6*******************************"
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func hiddenKey(key string, length int) string {
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prefix := key[0:5]
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if length > utf8.RuneCountInString(key) {
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length = utf8.RuneCountInString(key) - len(prefix)
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}
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return prefix + strings.Repeat("*", length)
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}
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