feat(credentials) Add google service account support

apps/sim/app/api/auth/oauth/credentials/route.ts

@@ -7,7 +7,10 @@ import { z } from 'zod'
 import { checkSessionOrInternalAuth } from '@/lib/auth/hybrid'
 import { generateRequestId } from '@/lib/core/utils/request'
 import { syncWorkspaceOAuthCredentialsForUser } from '@/lib/credentials/oauth'
-import { getCanonicalScopesForProvider } from '@/lib/oauth/utils'
+import {
+  getCanonicalScopesForProvider,
+  getServiceAccountProviderForProviderId,
+} from '@/lib/oauth/utils'
 import { authorizeWorkflowByWorkspacePermission } from '@/lib/workflows/utils'
 import { checkWorkspaceAccess } from '@/lib/workspaces/permissions/utils'
 
@@ -149,6 +152,7 @@ export async function GET(request: NextRequest) {
           displayName: credential.displayName,
           providerId: credential.providerId,
           accountId: credential.accountId,
+          updatedAt: credential.updatedAt,
           accountProviderId: account.providerId,
           accountScope: account.scope,
           accountUpdatedAt: account.updatedAt,
@@ -159,6 +163,45 @@ export async function GET(request: NextRequest) {
         .limit(1)
 
       if (platformCredential) {
+        if (platformCredential.type === 'service_account') {
+          if (workflowId) {
+            if (!effectiveWorkspaceId || platformCredential.workspaceId !== effectiveWorkspaceId) {
+              return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+            }
+          } else {
+            const [membership] = await db
+              .select({ id: credentialMember.id })
+              .from(credentialMember)
+              .where(
+                and(
+                  eq(credentialMember.credentialId, platformCredential.id),
+                  eq(credentialMember.userId, requesterUserId),
+                  eq(credentialMember.status, 'active')
+                )
+              )
+              .limit(1)
+
+            if (!membership) {
+              return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+            }
+          }
+
+          return NextResponse.json(
+            {
+              credentials: [
+                toCredentialResponse(
+                  platformCredential.id,
+                  platformCredential.displayName,
+                  platformCredential.providerId || 'google-service-account',
+                  platformCredential.updatedAt,
+                  null
+                ),
+              ],
+            },
+            { status: 200 }
+          )
+        }
+
         if (platformCredential.type !== 'oauth' || !platformCredential.accountId) {
           return NextResponse.json({ credentials: [] }, { status: 200 })
         }
@@ -238,14 +281,51 @@ export async function GET(request: NextRequest) {
           )
         )
 
-      return NextResponse.json(
-        {
-          credentials: credentialsData.map((row) =>
-            toCredentialResponse(row.id, row.displayName, row.providerId, row.updatedAt, row.scope)
-          ),
-        },
-        { status: 200 }
+      const results = credentialsData.map((row) =>
+        toCredentialResponse(row.id, row.displayName, row.providerId, row.updatedAt, row.scope)
       )
+
+      const saProviderId = getServiceAccountProviderForProviderId(providerParam)
+
+      if (saProviderId) {
+        const serviceAccountCreds = await db
+          .select({
+            id: credential.id,
+            displayName: credential.displayName,
+            providerId: credential.providerId,
+            updatedAt: credential.updatedAt,
+          })
+          .from(credential)
+          .innerJoin(
+            credentialMember,
+            and(
+              eq(credentialMember.credentialId, credential.id),
+              eq(credentialMember.userId, requesterUserId),
+              eq(credentialMember.status, 'active')
+            )
+          )
+          .where(
+            and(
+              eq(credential.workspaceId, effectiveWorkspaceId),
+              eq(credential.type, 'service_account'),
+              eq(credential.providerId, saProviderId)
+            )
+          )
+
+        for (const sa of serviceAccountCreds) {
+          results.push(
+            toCredentialResponse(
+              sa.id,
+              sa.displayName,
+              sa.providerId || saProviderId,
+              sa.updatedAt,
+              null
+            )
+          )
+        }
+      }
+
+      return NextResponse.json({ credentials: results }, { status: 200 })
     }
 
     return NextResponse.json({ credentials: [] }, { status: 200 })

apps/sim/app/api/auth/oauth/token/route.ts

@@ -4,7 +4,13 @@ import { z } from 'zod'
 import { authorizeCredentialUse } from '@/lib/auth/credential-access'
 import { AuthType, checkSessionOrInternalAuth } from '@/lib/auth/hybrid'
 import { generateRequestId } from '@/lib/core/utils/request'
-import { getCredential, getOAuthToken, refreshTokenIfNeeded } from '@/app/api/auth/oauth/utils'
+import {
+  getCredential,
+  getOAuthToken,
+  getServiceAccountToken,
+  refreshTokenIfNeeded,
+  resolveOAuthAccountId,
+} from '@/app/api/auth/oauth/utils'
 
 export const dynamic = 'force-dynamic'
 
@@ -18,6 +24,8 @@ const tokenRequestSchema = z
     credentialAccountUserId: z.string().min(1).optional(),
     providerId: z.string().min(1).optional(),
     workflowId: z.string().min(1).nullish(),
+    scopes: z.array(z.string()).optional(),
+    impersonateEmail: z.string().email().optional(),
   })
   .refine(
     (data) => data.credentialId || (data.credentialAccountUserId && data.providerId),
@@ -63,7 +71,14 @@ export async function POST(request: NextRequest) {
       )
     }
 
-    const { credentialId, credentialAccountUserId, providerId, workflowId } = parseResult.data
+    const {
+      credentialId,
+      credentialAccountUserId,
+      providerId,
+      workflowId,
+      scopes,
+      impersonateEmail,
+    } = parseResult.data
 
     if (credentialAccountUserId && providerId) {
       logger.info(`[${requestId}] Fetching token by credentialAccountUserId + providerId`, {
@@ -112,6 +127,32 @@ export async function POST(request: NextRequest) {
 
     const callerUserId = new URL(request.url).searchParams.get('userId') || undefined
 
+    const resolved = await resolveOAuthAccountId(credentialId)
+    if (resolved?.credentialType === 'service_account' && resolved.credentialId) {
+      const authz = await authorizeCredentialUse(request, {
+        credentialId,
+        workflowId: workflowId ?? undefined,
+        requireWorkflowIdForInternal: false,
+        callerUserId,
+      })
+      if (!authz.ok) {
+        return NextResponse.json({ error: authz.error || 'Unauthorized' }, { status: 403 })
+      }
+
+      try {
+        const defaultScopes = ['https://www.googleapis.com/auth/cloud-platform']
+        const accessToken = await getServiceAccountToken(
+          resolved.credentialId,
+          scopes && scopes.length > 0 ? scopes : defaultScopes,
+          impersonateEmail
+        )
+        return NextResponse.json({ accessToken }, { status: 200 })
+      } catch (error) {
+        logger.error(`[${requestId}] Service account token error:`, error)
+        return NextResponse.json({ error: 'Failed to get service account token' }, { status: 401 })
+      }
+    }
+
     const authz = await authorizeCredentialUse(request, {
       credentialId,
       workflowId: workflowId ?? undefined,

apps/sim/app/api/auth/oauth/utils.ts

@@ -1,7 +1,9 @@
+import { createSign } from 'crypto'
 import { db } from '@sim/db'
 import { account, credential, credentialSetMember } from '@sim/db/schema'
 import { createLogger } from '@sim/logger'
 import { and, desc, eq, inArray } from 'drizzle-orm'
+import { decryptSecret } from '@/lib/core/security/encryption'
 import { refreshOAuthToken } from '@/lib/oauth'
 import {
   getMicrosoftRefreshTokenExpiry,
@@ -25,16 +27,26 @@ interface AccountInsertData {
   accessTokenExpiresAt?: Date
 }
 
+export interface ResolvedCredential {
+  accountId: string
+  workspaceId?: string
+  usedCredentialTable: boolean
+  credentialType?: string
+  credentialId?: string
+}
+
 /**
  * Resolves a credential ID to its underlying account ID.
  * If `credentialId` matches a `credential` row, returns its `accountId` and `workspaceId`.
+ * For service_account credentials, returns credentialId and type instead of accountId.
  * Otherwise assumes `credentialId` is already a raw `account.id` (legacy).
  */
 export async function resolveOAuthAccountId(
   credentialId: string
-): Promise<{ accountId: string; workspaceId?: string; usedCredentialTable: boolean } | null> {
+): Promise<ResolvedCredential | null> {
   const [credentialRow] = await db
     .select({
+      id: credential.id,
       type: credential.type,
       accountId: credential.accountId,
       workspaceId: credential.workspaceId,
@@ -44,6 +56,16 @@ export async function resolveOAuthAccountId(
     .limit(1)
 
   if (credentialRow) {
+    if (credentialRow.type === 'service_account') {
+      return {
+        accountId: '',
+        credentialId: credentialRow.id,
+        credentialType: 'service_account',
+        workspaceId: credentialRow.workspaceId,
+        usedCredentialTable: true,
+      }
+    }
+
     if (credentialRow.type !== 'oauth' || !credentialRow.accountId) {
       return null
     }
@@ -57,6 +79,96 @@ export async function resolveOAuthAccountId(
   return { accountId: credentialId, usedCredentialTable: false }
 }
 
+/**
+ * Generates a short-lived access token for a Google service account credential
+ * using the two-legged OAuth JWT flow (RFC 7523).
+ */
+const SA_EXCLUDED_SCOPES = new Set([
+  'https://www.googleapis.com/auth/userinfo.email',
+  'https://www.googleapis.com/auth/userinfo.profile',
+])
+
+export async function getServiceAccountToken(
+  credentialId: string,
+  scopes: string[],
+  impersonateEmail?: string
+): Promise<string> {
+  const [credentialRow] = await db
+    .select({
+      encryptedServiceAccountKey: credential.encryptedServiceAccountKey,
+    })
+    .from(credential)
+    .where(eq(credential.id, credentialId))
+    .limit(1)
+
+  if (!credentialRow?.encryptedServiceAccountKey) {
+    throw new Error('Service account key not found')
+  }
+
+  const { decrypted } = await decryptSecret(credentialRow.encryptedServiceAccountKey)
+  const keyData = JSON.parse(decrypted) as {
+    client_email: string
+    private_key: string
+    token_uri?: string
+  }
+
+  const filteredScopes = scopes.filter((s) => !SA_EXCLUDED_SCOPES.has(s))
+
+  const now = Math.floor(Date.now() / 1000)
+  const tokenUri = keyData.token_uri || 'https://oauth2.googleapis.com/token'
+
+  const header = { alg: 'RS256', typ: 'JWT' }
+  const payload: Record<string, unknown> = {
+    iss: keyData.client_email,
+    scope: filteredScopes.join(' '),
+    aud: tokenUri,
+    iat: now,
+    exp: now + 3600,
+  }
+
+  if (impersonateEmail) {
+    payload.sub = impersonateEmail
+  }
+
+  logger.info('Service account JWT payload', {
+    iss: keyData.client_email,
+    sub: impersonateEmail || '(none)',
+    scopes: filteredScopes.join(' '),
+    aud: tokenUri,
+  })
+
+  const toBase64Url = (obj: unknown) => Buffer.from(JSON.stringify(obj)).toString('base64url')
+
+  const signingInput = `${toBase64Url(header)}.${toBase64Url(payload)}`
+
+  const signer = createSign('RSA-SHA256')
+  signer.update(signingInput)
+  const signature = signer.sign(keyData.private_key, 'base64url')
+
+  const jwt = `${signingInput}.${signature}`
+
+  const response = await fetch(tokenUri, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+    body: new URLSearchParams({
+      grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',
+      assertion: jwt,
+    }),
+  })
+
+  if (!response.ok) {
+    const errorBody = await response.text()
+    logger.error('Service account token exchange failed', {
+      status: response.status,
+      body: errorBody,
+    })
+    throw new Error(`Token exchange failed: ${response.status}`)
+  }
+
+  const tokenData = (await response.json()) as { access_token: string }
+  return tokenData.access_token
+}
+
 /**
  * Safely inserts an account record, handling duplicate constraint violations gracefully.
  * If a duplicate is detected (unique constraint violation), logs a warning and returns success.