feat: added support for sap hana dynamic secrets

backend/src/ee/services/dynamic-secret/providers/sap-hana.ts

@@ -0,0 +1,183 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable @typescript-eslint/no-unsafe-member-access */
+/* eslint-disable @typescript-eslint/no-unsafe-call */
+/* eslint-disable @typescript-eslint/no-unsafe-return */
+/* eslint-disable @typescript-eslint/no-unsafe-assignment */
+
+import handlebars from "handlebars";
+import hdb from "hdb";
+import { customAlphabet } from "nanoid";
+import { z } from "zod";
+
+import { getConfig } from "@app/lib/config/env";
+import { BadRequestError } from "@app/lib/errors";
+import { alphaNumericNanoId } from "@app/lib/nanoid";
+
+import { DynamicSecretSapHanaSchema, TDynamicProviderFns } from "./models";
+
+const generatePassword = (size = 48) => {
+  const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+  return customAlphabet(charset, 48)(size);
+};
+
+const generateUsername = () => {
+  return alphaNumericNanoId(32);
+};
+
+export const SapHanaProvider = (): TDynamicProviderFns => {
+  const validateProviderInputs = async (inputs: unknown) => {
+    const appCfg = getConfig();
+    const providerInputs = await DynamicSecretSapHanaSchema.parseAsync(inputs);
+
+    if (
+      appCfg.isCloud &&
+      // localhost
+      // internal ips
+      (providerInputs.host === "host.docker.internal" ||
+        providerInputs.host.match(/^10\.\d+\.\d+\.\d+/) ||
+        providerInputs.host.match(/^192\.168\.\d+\.\d+/))
+    )
+      throw new BadRequestError({ message: "Invalid db host" });
+
+    if (providerInputs.host === "localhost" || providerInputs.host === "127.0.0.1") {
+      throw new BadRequestError({ message: "Invalid db host" });
+    }
+
+    return providerInputs;
+  };
+
+  const getClient = async (providerInputs: z.infer<typeof DynamicSecretSapHanaSchema>) => {
+    const client = hdb.createClient({
+      host: providerInputs.host,
+      port: providerInputs.port,
+      user: providerInputs.username,
+      password: providerInputs.password
+    });
+
+    await new Promise((resolve, reject) => {
+      client.connect((err: any) => {
+        if (err) {
+          return reject(err);
+        }
+
+        if (client.readyState) {
+          return resolve(true);
+        }
+
+        reject(new Error("SAP HANA client not ready"));
+      });
+    });
+
+    return client;
+  };
+
+  const validateConnection = async (inputs: unknown) => {
+    const providerInputs = await validateProviderInputs(inputs);
+    const client = await getClient(providerInputs);
+
+    const testResult: boolean = await new Promise((resolve, reject) => {
+      client.exec("SELECT 1 FROM DUMMY;", (err: any) => {
+        if (err) {
+          reject();
+        }
+
+        resolve(true);
+      });
+    });
+
+    return testResult;
+  };
+
+  const create = async (inputs: unknown, expireAt: number) => {
+    const providerInputs = await validateProviderInputs(inputs);
+
+    const username = generateUsername();
+    const password = generatePassword();
+    const expiration = new Date(expireAt).toISOString();
+
+    const client = await getClient(providerInputs);
+    const creationStatement = handlebars.compile(providerInputs.creationStatement, { noEscape: true })({
+      username,
+      password,
+      expiration
+    });
+
+    const queries = creationStatement.toString().split(";").filter(Boolean);
+    for await (const query of queries) {
+      await new Promise((resolve, reject) => {
+        client.exec(query, (err: any) => {
+          if (err) {
+            reject(
+              new BadRequestError({
+                message: err.message
+              })
+            );
+          }
+          resolve(true);
+        });
+      });
+    }
+
+    return { entityId: username, data: { DB_USERNAME: username, DB_PASSWORD: password } };
+  };
+
+  const revoke = async (inputs: unknown, username: string) => {
+    const providerInputs = await validateProviderInputs(inputs);
+    const client = await getClient(providerInputs);
+    const revokeStatement = handlebars.compile(providerInputs.revocationStatement)({ username });
+    const queries = revokeStatement.toString().split(";").filter(Boolean);
+    for await (const query of queries) {
+      await new Promise((resolve, reject) => {
+        client.exec(query, (err: any) => {
+          if (err) {
+            reject(
+              new BadRequestError({
+                message: err.message
+              })
+            );
+          }
+          resolve(true);
+        });
+      });
+    }
+
+    return { entityId: username };
+  };
+
+  const renew = async (inputs: unknown, username: string, expireAt: number) => {
+    const providerInputs = await validateProviderInputs(inputs);
+    const client = await getClient(providerInputs);
+    try {
+      const expiration = new Date(expireAt).toISOString();
+
+      const renewStatement = handlebars.compile(providerInputs.renewStatement)({ username, expiration });
+      const queries = renewStatement.toString().split(";").filter(Boolean);
+      for await (const query of queries) {
+        await new Promise((resolve, reject) => {
+          client.exec(query, (err: any) => {
+            if (err) {
+              reject(
+                new BadRequestError({
+                  message: err.message
+                })
+              );
+            }
+            resolve(true);
+          });
+        });
+      }
+    } finally {
+      client.disconnect();
+    }
+
+    return { entityId: username };
+  };
+
+  return {
+    validateProviderInputs,
+    validateConnection,
+    create,
+    revoke,
+    renew
+  };
+};