feat: sdk migration in progress

internal/utils/keys.go

@@ -0,0 +1,107 @@
+package utils
+
+import (
+	"encoding/base64"
+	"errors"
+	"fmt"
+
+	"github.com/glueops/autoglue/internal/models"
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+func getMasterKey(db *gorm.DB) ([]byte, error) {
+	var mk models.MasterKey
+	if err := db.Where("is_active = ?", true).Order("created_at DESC").First(&mk).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, ErrNoActiveMasterKey
+		}
+		return nil, fmt.Errorf("querying master key: %w", err)
+	}
+
+	keyBytes, err := base64.StdEncoding.DecodeString(mk.Key)
+	if err != nil {
+		return nil, fmt.Errorf("decoding master key: %w", err)
+	}
+	if len(keyBytes) != 32 {
+		return nil, fmt.Errorf("%w: got %d, want 32", ErrInvalidMasterKeyLen, len(keyBytes))
+	}
+	return keyBytes, nil
+}
+
+func getOrCreateTenantKey(orgID string, db *gorm.DB) ([]byte, error) {
+	var orgKey models.OrganizationKey
+	err := db.Where("organization_id = ?", orgID).First(&orgKey).Error
+	if err == nil {
+		encKeyB64 := orgKey.EncryptedKey
+		ivB64 := orgKey.IV
+		tagB64 := orgKey.Tag
+
+		encryptedKey, err := DecodeB64(encKeyB64)
+		if err != nil {
+			return nil, fmt.Errorf("decode enc key: %w", err)
+		}
+
+		iv, err := DecodeB64(ivB64)
+		if err != nil {
+			return nil, fmt.Errorf("decode iv: %w", err)
+		}
+
+		tag, err := DecodeB64(tagB64)
+		if err != nil {
+			return nil, fmt.Errorf("decode tag: %w", err)
+		}
+
+		masterKey, err := getMasterKey(db)
+		if err != nil {
+			return nil, err
+		}
+
+		return decryptAESGCM(encryptedKey, masterKey, iv, tag)
+	}
+
+	if !errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil, err
+	}
+
+	// Create new tenant key and wrap with the current master key
+	orgUUID, err := uuid.Parse(orgID)
+	if err != nil {
+		return nil, fmt.Errorf("%w: %v", ErrInvalidOrgID, err)
+	}
+
+	tenantKey, err := randomBytes(32)
+	if err != nil {
+		return nil, fmt.Errorf("tenant key gen: %w", err)
+	}
+
+	masterKey, err := getMasterKey(db)
+	if err != nil {
+		return nil, err
+	}
+
+	encrypted, iv, tag, err := encryptAESGCM(tenantKey, masterKey)
+	if err != nil {
+		return nil, fmt.Errorf("wrap tenant key: %w", err)
+	}
+
+	var mk models.MasterKey
+	if err := db.Where("is_active = ?", true).Order("created_at DESC").First(&mk).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, ErrNoActiveMasterKey
+		}
+		return nil, fmt.Errorf("querying master key: %w", err)
+	}
+
+	orgKey = models.OrganizationKey{
+		OrganizationID: orgUUID,
+		MasterKeyID:    mk.ID,
+		EncryptedKey:   EncodeB64(encrypted),
+		IV:             EncodeB64(iv),
+		Tag:            EncodeB64(tag),
+	}
+	if err := db.Create(&orgKey).Error; err != nil {
+		return nil, fmt.Errorf("persist org key: %w", err)
+	}
+	return tenantKey, nil
+}