feat(keychain): add rust keychain plugin vault implementation

This is partially a new feature, partially an example to
demonstrate how one can develop a plugin written in
in rust that then will be callable by other (non-rust) plugins
that are hosted inside a Cactus node's API server(s).

99% of the rust code here was generated by the command below:

docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli generate \
    --input-spec https://raw.githubusercontent.com/petermetz/cactus/feat/cmd-api-server/out-of-process-plugin-Instances-for-language-Independence-170/packages/cactus-plugin-keychain-vault/src/main/json/openapi.json \
    --generator-name rust-server \
    -o /local/gen/rust-server

The only thing that was then added to the generated rust code
is the logic that uses the vault client create to do the
get/set operations in vault and parses the environment
variables for the vault token, host.
Still a to-do for the above to have a proper has/delete method
in the rust code which was not implemented due to time constraints.

Also added a Typescript implementation of the vault keychain plugin
just so that we can have a full end to end test coverage of all the
variants of configurations where the plugin is local vs. remote.

Signed-off-by: Peter Somogyvari <peter.somogyvari@accenture.com>

packages/cactus-cmd-api-server/package.json

@@ -89,6 +89,8 @@
     "uuid": "7.0.2"
   },
   "devDependencies": {
+    "@hyperledger/cactus-plugin-keychain-vault": "0.3.0",
+    "@hyperledger/cactus-test-tooling": "0.3.0",
     "@types/compression": "1.7.0",
     "@types/convict": "5.2.1",
     "@types/cors": "2.8.6",

packages/cactus-cmd-api-server/src/test/typescript/integration/remote-plugin-imports.test.ts

@@ -0,0 +1,94 @@
+import test, { Test } from "tape-promise/tape";
+import { v4 as uuidv4 } from "uuid";
+
+import { LogLevelDesc } from "@hyperledger/cactus-common";
+
+import { ApiServer, ConfigService } from "../../../main/typescript/public-api";
+
+import {
+  CactusKeychainVaultServer,
+  Containers,
+  K_DEFAULT_VAULT_DEV_ROOT_TOKEN,
+  K_DEFAULT_VAULT_HTTP_PORT,
+  VaultTestServer,
+} from "@hyperledger/cactus-test-tooling";
+
+import { DefaultApi } from "@hyperledger/cactus-plugin-keychain-vault";
+import { PluginImportType } from "@hyperledger/cactus-core-api";
+
+test("NodeJS API server + Rust plugin work together", async (t: Test) => {
+  const vaultTestContainer = new VaultTestServer({});
+  await vaultTestContainer.start();
+
+  const ci = await Containers.getById(vaultTestContainer.containerId);
+  const vaultIpAddr = await Containers.getContainerInternalIp(ci);
+  t.comment(`Container VaultTestServer has IPv4: ${vaultIpAddr}`);
+
+  test.onFinish(async () => {
+    await vaultTestContainer.stop();
+    await vaultTestContainer.destroy();
+  });
+
+  const hostPortVault = await vaultTestContainer.getHostPortHttp();
+  t.comment(`Container VaultTestServer (Port=${hostPortVault}) started OK`);
+  const vaultHost = `http://${vaultIpAddr}:${K_DEFAULT_VAULT_HTTP_PORT}`;
+
+  const pluginContainer = new CactusKeychainVaultServer({
+    envVars: [
+      `VAULT_HOST=${vaultHost}`,
+      `VAULT_TOKEN=${K_DEFAULT_VAULT_DEV_ROOT_TOKEN}`,
+      "HOST=0.0.0.0:8080",
+    ],
+  });
+  await pluginContainer.start();
+
+  test.onFinish(async () => {
+    await pluginContainer.stop();
+    await pluginContainer.destroy();
+  });
+
+  const hostPort = await pluginContainer.getHostPortHttp();
+  t.comment(`CactusKeychainVaultServer (Port=${hostPort}) started OK`);
+
+  const configuration = { basePath: `http://localhost:${hostPort}` };
+  const apiClient = new DefaultApi(configuration);
+
+  const configService = new ConfigService();
+  const apiServerOptions = configService.newExampleConfig();
+  apiServerOptions.configFile = "";
+  apiServerOptions.apiCorsDomainCsv = "*";
+  apiServerOptions.apiPort = 0;
+  apiServerOptions.cockpitPort = 0;
+  apiServerOptions.apiTlsEnabled = false;
+  apiServerOptions.plugins = [
+    {
+      packageName: "@hyperledger/cactus-plugin-keychain-vault",
+      type: PluginImportType.REMOTE,
+      options: {
+        keychainId: "_keychainId_",
+        instanceId: "_instanceId_",
+        remoteConfig: configuration,
+      },
+    },
+  ];
+  const config = configService.newExampleConfigConvict(apiServerOptions);
+
+  const apiServer = new ApiServer({
+    config: config.getProperties(),
+  });
+
+  await t.doesNotReject(apiServer.start(), "Started API server OK");
+  test.onFinish(() => apiServer.shutdown());
+
+  const key = uuidv4();
+  const expected = uuidv4();
+
+  await apiClient.setKeychainEntry({ key, value: expected });
+  const {
+    data: { value: actual },
+  } = await apiClient.getKeychainEntry({ key });
+
+  t.equal(actual, expected, "Keychain stored value matches input OK");
+
+  t.end();
+});