feat(vault-jwt): allow specifying the vault jwt token directly

vault-jwt/README.md

@@ -10,16 +10,17 @@ tags: [helper, integration, vault, jwt, oidc]
 
 # Hashicorp Vault Integration (JWT)
 
-This module lets you authenticate with [Hashicorp Vault](https://www.vaultproject.io/) in your Coder workspaces by reusing the [OIDC](https://coder.com/docs/admin/users/oidc-auth) access token from Coder's OIDC authentication method. This requires configuring the Vault [JWT/OIDC](https://developer.hashicorp.com/vault/docs/auth/jwt#configuration) auth method.
+This module lets you authenticate with [Hashicorp Vault](https://www.vaultproject.io/) in your Coder workspaces by reusing the [OIDC](https://coder.com/docs/admin/users/oidc-auth) access token from Coder's OIDC authentication method or another source of jwt token. This requires configuring the Vault [JWT/OIDC](https://developer.hashicorp.com/vault/docs/auth/jwt#configuration) auth method.
 
 ```tf
 module "vault" {
-  count          = data.coder_workspace.me.start_count
-  source         = "registry.coder.com/modules/vault-jwt/coder"
-  version        = "1.0.21"
-  agent_id       = coder_agent.example.id
-  vault_addr     = "https://vault.example.com"
-  vault_jwt_role = "coder" # The Vault role to use for authentication
+  count           = data.coder_workspace.me.start_count
+  source          = "registry.coder.com/modules/vault-jwt/coder"
+  version         = "1.0.21"
+  agent_id        = coder_agent.example.id
+  vault_addr      = "https://vault.example.com"
+  vault_jwt_role  = "coder"                # The Vault role to use for authentication
+  vault_jwt_token = "eyJhbGciOiJIUzI1N..." # optional, if not present, defaults to user's oidc authentication token
 }
 ```
 
@@ -79,3 +80,105 @@ module "vault" {
   vault_cli_version = "1.17.5"
 }
 ```
+
+### use a custom jwt token
+
+```tf
+
+terraform {
+  required_providers {
+    jwt = {
+      source  = "geektheripper/jwt"
+      version = "1.1.4"
+    }
+    time = {
+      source  = "hashicorp/time"
+      version = "0.11.1"
+    }
+  }
+}
+
+
+resource "jwt_signed_token" "vault" {
+  count     = data.coder_workspace.me.start_count
+  algorithm = "RS256"
+  # `openssl genrsa -out key.pem 4096` and `openssl rsa -in key.pem -pubout > pub.pem` to generate keys
+  key = file("key.pem")
+  claims_json = jsonencode({
+    iss = "https://code.example.com"
+    sub = "${data.coder_workspace.me.id}"
+    aud = "https://vault.example.com"
+    iat = provider::time::rfc3339_parse(plantimestamp()).unix
+    # exp = timeadd(timestamp(), 3600)
+    agent            = coder_agent.main.id
+    provisioner      = data.coder_provisioner.main.id
+    provisioner_arch = data.coder_provisioner.main.arch
+    provisioner_os   = data.coder_provisioner.main.os
+
+    workspace        = data.coder_workspace.me.id
+    workspace_url    = data.coder_workspace.me.access_url
+    workspace_port   = data.coder_workspace.me.access_port
+    workspace_name   = data.coder_workspace.me.name
+    template         = data.coder_workspace.me.template_id
+    template_name    = data.coder_workspace.me.template_name
+    template_version = data.coder_workspace.me.template_version
+    owner            = data.coder_workspace_owner.me.id
+    owner_name       = data.coder_workspace_owner.me.name
+    owner_email      = data.coder_workspace_owner.me.email
+    owner_login_type = data.coder_workspace_owner.me.login_type
+    owner_groups     = data.coder_workspace_owner.me.groups
+  })
+}
+
+module "vault" {
+  count           = data.coder_workspace.me.start_count
+  source          = "registry.coder.com/modules/vault-jwt/coder"
+  version         = "1.0.20"
+  agent_id        = coder_agent.example.id
+  vault_addr      = "https://vault.example.com"
+  vault_jwt_role  = "coder" # The Vault role to use for authentication
+  vault_jwt_token = jwt_signed_token.vault[0].token
+}
+```
+
+#### example vault jwt role
+
+```
+vault write auth/<JWT_MOUNT>/role/workspace -<<EOF
+{
+  "user_claim": "sub",
+  "bound_audiences": "https://vault.example.com",
+  "role_type": "jwt",
+  "ttl": "1h",
+  "claim_mappings": {
+    "owner": "owner",
+    "owner_email": "owner_email",
+    "owner_login_type": "owner_login_type",
+    "owner_name": "owner_name",
+    "provisioner": "provisioner",
+    "provisioner_arch": "provisioner_arch",
+    "provisioner_os": "provisioner_os",
+    "sub": "sub",
+    "template": "template",
+    "template_name": "template_name",
+    "template_version": "template_version",
+    "workspace": "workspace",
+    "workspace_name": "workspace_name",
+    "workspace_id": "workspace_id"
+}
+}
+EOF
+```
+
+#### example workspace access vault policy
+
+```hcl
+path "kv/data/app/coder/{{identity.entity.aliases.<MOUNT_ACCESSOR>.metadata.owner_name}}/{{identity.entity.aliases.<MOUNT_ACCESSOR>.metadata.workspace_name}}" {
+  capabilities = ["create", "read", "update", "delete", "list", "subscribe"]
+  subscribe_event_types = ["*"]
+}
+path "kv/metadata/app/coder/{{identity.entity.aliases.<MOUNT_ACCESSOR>.metadata.owner_name}}/{{identity.entity.aliases.<MOUNT_ACCESSOR>.metadata.workspace_name}}" {
+  capabilities = ["create", "read", "update", "delete", "list", "subscribe"]
+  subscribe_event_types = ["*"]
+}
+```

vault-jwt/main.tf

@@ -20,6 +20,13 @@ variable "vault_addr" {
   description = "The address of the Vault server."
 }
 
+variable "vault_jwt_token" {
+  type        = string
+  description = "The JWT token used for authentication with Vault."
+  default     = null
+  sensitive   = true
+}
+
 variable "vault_jwt_auth_path" {
   type        = string
   description = "The path to the Vault JWT auth method."
@@ -46,7 +53,7 @@ resource "coder_script" "vault" {
   display_name = "Vault (GitHub)"
   icon         = "/icon/vault.svg"
   script = templatefile("${path.module}/run.sh", {
-    CODER_OIDC_ACCESS_TOKEN : data.coder_workspace_owner.me.oidc_access_token,
+    CODER_OIDC_ACCESS_TOKEN : var.vault_jwt_token != null ? var.vault_jwt_token : data.coder_workspace_owner.me.oidc_access_token,
     VAULT_JWT_AUTH_PATH : var.vault_jwt_auth_path,
     VAULT_JWT_ROLE : var.vault_jwt_role,
     VAULT_CLI_VERSION : var.vault_cli_version,