|
| 1 | +package handler |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "net/http" |
| 6 | + |
| 7 | + "github.com/gin-gonic/gin" |
| 8 | + "github.com/redis/go-redis/v9" |
| 9 | + |
| 10 | + "github.com/memodb-io/Acontext/internal/infra/blob" |
| 11 | + "github.com/memodb-io/Acontext/internal/middleware" |
| 12 | + "github.com/memodb-io/Acontext/internal/modules/model" |
| 13 | + "github.com/memodb-io/Acontext/internal/modules/repo" |
| 14 | + "github.com/memodb-io/Acontext/internal/modules/serializer" |
| 15 | + "gorm.io/gorm" |
| 16 | +) |
| 17 | + |
| 18 | +// encryptProject is the shared implementation for enabling project encryption. |
| 19 | +// Both AdminHandler and ProjectHandler delegate to this function. |
| 20 | +func encryptProject(c *gin.Context, db *gorm.DB, rdb *redis.Client, s3 *blob.S3Deps, assetRefRepo repo.AssetReferenceRepo) { |
| 21 | + project, ok := c.MustGet("project").(*model.Project) |
| 22 | + if !ok { |
| 23 | + c.JSON(http.StatusBadRequest, serializer.ParamErr("", fmt.Errorf("project not found"))) |
| 24 | + return |
| 25 | + } |
| 26 | + |
| 27 | + userKEK := middleware.GetUserKEK(c) |
| 28 | + if userKEK == nil { |
| 29 | + c.JSON(http.StatusBadRequest, serializer.ParamErr("", fmt.Errorf("API key required to derive encryption key"))) |
| 30 | + return |
| 31 | + } |
| 32 | + |
| 33 | + // No early-return if EncryptionEnabled is already true — allow idempotent |
| 34 | + // retry so that partial failures (crash after flag set, before all objects |
| 35 | + // encrypted) can be recovered by re-calling this endpoint. |
| 36 | + // EncryptObject skips already-encrypted objects, and the DB UPDATE is a no-op |
| 37 | + // when the flag is already true. |
| 38 | + |
| 39 | + // Set encryption_enabled = true FIRST for crash safety. |
| 40 | + // If we crash after this but before encrypting all objects, reads will use KEK |
| 41 | + // and unencrypted objects pass through decryption gracefully. Retry re-encrypts |
| 42 | + // remaining objects (EncryptObject is idempotent). |
| 43 | + if err := db.WithContext(c.Request.Context()).Model(&model.Project{}). |
| 44 | + Where("id = ?", project.ID). |
| 45 | + Update("encryption_enabled", true).Error; err != nil { |
| 46 | + c.JSON(http.StatusInternalServerError, serializer.DBErr("failed to update project", err)) |
| 47 | + return |
| 48 | + } |
| 49 | + |
| 50 | + // Invalidate cached project so subsequent requests see encryption_enabled = true |
| 51 | + middleware.InvalidateProjectAuthCache(rdb, project.SecretKeyHMAC) |
| 52 | + |
| 53 | + // Enumerate all S3 keys for this project |
| 54 | + s3Keys, err := assetRefRepo.ListS3KeysByProject(c.Request.Context(), project.ID) |
| 55 | + if err != nil { |
| 56 | + c.JSON(http.StatusInternalServerError, serializer.DBErr("failed to list S3 keys", err)) |
| 57 | + return |
| 58 | + } |
| 59 | + |
| 60 | + // Encrypt each object (idempotent — skips already-encrypted objects) |
| 61 | + for _, key := range s3Keys { |
| 62 | + if err := s3.EncryptObject(c.Request.Context(), key, userKEK); err != nil { |
| 63 | + c.JSON(http.StatusInternalServerError, serializer.DBErr(fmt.Sprintf("failed to encrypt object %s", key), err)) |
| 64 | + return |
| 65 | + } |
| 66 | + } |
| 67 | + |
| 68 | + c.JSON(http.StatusOK, serializer.Response{Msg: "encryption enabled"}) |
| 69 | +} |
| 70 | + |
| 71 | +// decryptProject is the shared implementation for disabling project encryption. |
| 72 | +// Both AdminHandler and ProjectHandler delegate to this function. |
| 73 | +func decryptProject(c *gin.Context, db *gorm.DB, rdb *redis.Client, s3 *blob.S3Deps, assetRefRepo repo.AssetReferenceRepo) { |
| 74 | + project, ok := c.MustGet("project").(*model.Project) |
| 75 | + if !ok { |
| 76 | + c.JSON(http.StatusBadRequest, serializer.ParamErr("", fmt.Errorf("project not found"))) |
| 77 | + return |
| 78 | + } |
| 79 | + |
| 80 | + userKEK := middleware.GetUserKEK(c) |
| 81 | + if userKEK == nil { |
| 82 | + c.JSON(http.StatusBadRequest, serializer.ParamErr("", fmt.Errorf("API key required to derive encryption key"))) |
| 83 | + return |
| 84 | + } |
| 85 | + |
| 86 | + if !project.EncryptionEnabled { |
| 87 | + c.JSON(http.StatusBadRequest, serializer.ParamErr("project encryption is not enabled", nil)) |
| 88 | + return |
| 89 | + } |
| 90 | + |
| 91 | + // Enumerate all S3 keys for this project |
| 92 | + s3Keys, err := assetRefRepo.ListS3KeysByProject(c.Request.Context(), project.ID) |
| 93 | + if err != nil { |
| 94 | + c.JSON(http.StatusInternalServerError, serializer.DBErr("failed to list S3 keys", err)) |
| 95 | + return |
| 96 | + } |
| 97 | + |
| 98 | + // Decrypt each object FIRST, then clear the flag (idempotent — skips already-decrypted). |
| 99 | + // If we crash mid-decrypt, flag stays true so reads use KEK, which works on |
| 100 | + // both encrypted and already-decrypted objects. Retry re-decrypts remaining. |
| 101 | + for _, key := range s3Keys { |
| 102 | + if err := s3.DecryptObject(c.Request.Context(), key, userKEK); err != nil { |
| 103 | + c.JSON(http.StatusInternalServerError, serializer.DBErr(fmt.Sprintf("failed to decrypt object %s", key), err)) |
| 104 | + return |
| 105 | + } |
| 106 | + } |
| 107 | + |
| 108 | + // Set encryption_enabled = false AFTER all objects are decrypted |
| 109 | + if err := db.WithContext(c.Request.Context()).Model(&model.Project{}). |
| 110 | + Where("id = ?", project.ID). |
| 111 | + Update("encryption_enabled", false).Error; err != nil { |
| 112 | + c.JSON(http.StatusInternalServerError, serializer.DBErr("failed to update project", err)) |
| 113 | + return |
| 114 | + } |
| 115 | + |
| 116 | + // Invalidate cached project so subsequent requests see encryption_enabled = false |
| 117 | + middleware.InvalidateProjectAuthCache(rdb, project.SecretKeyHMAC) |
| 118 | + |
| 119 | + c.JSON(http.StatusOK, serializer.Response{Msg: "encryption disabled"}) |
| 120 | +} |
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