[SM-288] Rename models to follow naming convention (#3795)

libs/common/src/models/domain/enc-string.ts

@@ -0,0 +1,169 @@
+import { Jsonify } from "type-fest";
+
+import { EncryptionType } from "../../enums/encryptionType";
+import { IEncrypted } from "../../interfaces/IEncrypted";
+import { Utils } from "../../misc/utils";
+
+import { SymmetricCryptoKey } from "./symmetric-crypto-key";
+
+export class EncString implements IEncrypted {
+  encryptedString?: string;
+  encryptionType?: EncryptionType;
+  decryptedValue?: string;
+  data?: string;
+  iv?: string;
+  mac?: string;
+
+  constructor(
+    encryptedStringOrType: string | EncryptionType,
+    data?: string,
+    iv?: string,
+    mac?: string
+  ) {
+    if (data != null) {
+      this.initFromData(encryptedStringOrType as EncryptionType, data, iv, mac);
+    } else {
+      this.initFromEncryptedString(encryptedStringOrType as string);
+    }
+  }
+
+  get ivBytes(): ArrayBuffer {
+    return this.iv == null ? null : Utils.fromB64ToArray(this.iv).buffer;
+  }
+
+  get macBytes(): ArrayBuffer {
+    return this.mac == null ? null : Utils.fromB64ToArray(this.mac).buffer;
+  }
+
+  get dataBytes(): ArrayBuffer {
+    return this.data == null ? null : Utils.fromB64ToArray(this.data).buffer;
+  }
+
+  toJSON() {
+    return this.encryptedString;
+  }
+
+  static fromJSON(obj: Jsonify<EncString>): EncString {
+    if (obj == null) {
+      return null;
+    }
+
+    return new EncString(obj);
+  }
+
+  private initFromData(encType: EncryptionType, data: string, iv: string, mac: string) {
+    if (iv != null) {
+      this.encryptedString = encType + "." + iv + "|" + data;
+    } else {
+      this.encryptedString = encType + "." + data;
+    }
+
+    // mac
+    if (mac != null) {
+      this.encryptedString += "|" + mac;
+    }
+
+    this.encryptionType = encType;
+    this.data = data;
+    this.iv = iv;
+    this.mac = mac;
+  }
+
+  private initFromEncryptedString(encryptedString: string) {
+    this.encryptedString = encryptedString as string;
+    if (!this.encryptedString) {
+      return;
+    }
+
+    const { encType, encPieces } = this.parseEncryptedString(this.encryptedString);
+    this.encryptionType = encType;
+
+    switch (encType) {
+      case EncryptionType.AesCbc128_HmacSha256_B64:
+      case EncryptionType.AesCbc256_HmacSha256_B64:
+        if (encPieces.length !== 3) {
+          return;
+        }
+
+        this.iv = encPieces[0];
+        this.data = encPieces[1];
+        this.mac = encPieces[2];
+        break;
+      case EncryptionType.AesCbc256_B64:
+        if (encPieces.length !== 2) {
+          return;
+        }
+
+        this.iv = encPieces[0];
+        this.data = encPieces[1];
+        break;
+      case EncryptionType.Rsa2048_OaepSha256_B64:
+      case EncryptionType.Rsa2048_OaepSha1_B64:
+        if (encPieces.length !== 1) {
+          return;
+        }
+
+        this.data = encPieces[0];
+        break;
+      default:
+        return;
+    }
+  }
+
+  private parseEncryptedString(encryptedString: string): {
+    encType: EncryptionType;
+    encPieces: string[];
+  } {
+    const headerPieces = encryptedString.split(".");
+    let encType: EncryptionType;
+    let encPieces: string[] = null;
+
+    if (headerPieces.length === 2) {
+      try {
+        encType = parseInt(headerPieces[0], null);
+        encPieces = headerPieces[1].split("|");
+      } catch (e) {
+        return;
+      }
+    } else {
+      encPieces = encryptedString.split("|");
+      encType =
+        encPieces.length === 3
+          ? EncryptionType.AesCbc128_HmacSha256_B64
+          : EncryptionType.AesCbc256_B64;
+    }
+
+    return {
+      encType,
+      encPieces,
+    };
+  }
+
+  async decrypt(orgId: string, key: SymmetricCryptoKey = null): Promise<string> {
+    if (this.decryptedValue != null) {
+      return this.decryptedValue;
+    }
+
+    try {
+      if (key == null) {
+        key = await this.getKeyForDecryption(orgId);
+      }
+      if (key == null) {
+        throw new Error("No key to decrypt EncString with orgId " + orgId);
+      }
+
+      const encryptService = Utils.getContainerService().getEncryptService();
+      this.decryptedValue = await encryptService.decryptToUtf8(this, key);
+    } catch (e) {
+      this.decryptedValue = "[error: cannot decrypt]";
+    }
+    return this.decryptedValue;
+  }
+
+  private async getKeyForDecryption(orgId: string) {
+    const cryptoService = Utils.getContainerService().getCryptoService();
+    return orgId != null
+      ? await cryptoService.getOrgKey(orgId)
+      : await cryptoService.getKeyForUserEncryption();
+  }
+}