refactor(core): Reorganize n8n-core and enforce file-name casing (no-changelog) (#12667)

packages/core/src/credentials.ts

@@ -0,0 +1,53 @@
+import { Container } from '@n8n/di';
+import type { ICredentialDataDecryptedObject, ICredentialsEncrypted } from 'n8n-workflow';
+import { ApplicationError, ICredentials, jsonParse } from 'n8n-workflow';
+
+import { Cipher } from '@/encryption/cipher';
+
+export class Credentials<
+	T extends object = ICredentialDataDecryptedObject,
+> extends ICredentials<T> {
+	private readonly cipher = Container.get(Cipher);
+
+	/**
+	 * Sets new credential object
+	 */
+	setData(data: T): void {
+		this.data = this.cipher.encrypt(data);
+	}
+
+	/**
+	 * Returns the decrypted credential object
+	 */
+	getData(): T {
+		if (this.data === undefined) {
+			throw new ApplicationError('No data is set so nothing can be returned.');
+		}
+
+		try {
+			const decryptedData = this.cipher.decrypt(this.data);
+
+			return jsonParse(decryptedData);
+		} catch (e) {
+			throw new ApplicationError(
+				'Credentials could not be decrypted. The likely reason is that a different "encryptionKey" was used to encrypt the data.',
+			);
+		}
+	}
+
+	/**
+	 * Returns the encrypted credentials to be saved
+	 */
+	getDataToSave(): ICredentialsEncrypted {
+		if (this.data === undefined) {
+			throw new ApplicationError('No credentials were set to save.');
+		}
+
+		return {
+			id: this.id,
+			name: this.name,
+			type: this.type,
+			data: this.data,
+		};
+	}
+}