feat: NextAuth credentials + JWT 8h + rate limiting

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

jest.config.ts

@@ -7,6 +7,9 @@ const config: Config = {
   coverageProvider: 'v8',
   testEnvironment: 'node',
   setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1',
+  },
 }
 
 export default createJestConfig(config)

src/__tests__/lib/auth.test.ts

@@ -0,0 +1,68 @@
+import { authOptions } from '@/lib/auth'
+
+// Mock Prisma
+jest.mock('@/lib/prisma', () => ({
+  prisma: {
+    user: {
+      findUnique: jest.fn(),
+    },
+  },
+}))
+
+// Mock rate-limit
+jest.mock('@/lib/rate-limit', () => ({
+  checkRateLimit: jest.fn(() => true),
+  recordFailedAttempt: jest.fn(),
+  clearAttempts: jest.fn(),
+}))
+
+import { prisma } from '@/lib/prisma'
+import { checkRateLimit, recordFailedAttempt, clearAttempts } from '@/lib/rate-limit'
+
+const mockFindUnique = prisma.user.findUnique as jest.Mock
+
+describe('NextAuth authorize', () => {
+  const authorize = (authOptions.providers[0] as any).options.authorize
+
+  beforeEach(() => jest.clearAllMocks())
+
+  it('retourne null si credentials manquants', async () => {
+    const result = await authorize({ email: '', password: '' }, {})
+    expect(result).toBeNull()
+  })
+
+  it('retourne null si utilisateur introuvable', async () => {
+    mockFindUnique.mockResolvedValue(null)
+    const result = await authorize(
+      { email: 'a@b.com', password: 'wrong' },
+      { headers: {} }
+    )
+    expect(result).toBeNull()
+    expect(recordFailedAttempt).toHaveBeenCalled()
+  })
+
+  it('retourne l\'utilisateur si mot de passe correct', async () => {
+    const { hash } = await import('bcryptjs')
+    const hashedPwd = await hash('correct', 12)
+    mockFindUnique.mockResolvedValue({
+      id: 'user1',
+      email: 'a@b.com',
+      name: 'Alice',
+      role: 'gestionnaire',
+      password: hashedPwd,
+    })
+    const result = await authorize(
+      { email: 'a@b.com', password: 'correct' },
+      { headers: {} }
+    )
+    expect(result).toEqual({ id: 'user1', email: 'a@b.com', name: 'Alice', role: 'gestionnaire' })
+    expect(clearAttempts).toHaveBeenCalled()
+  })
+
+  it('lève RATE_LIMITED si bloqué', async () => {
+    ;(checkRateLimit as jest.Mock).mockReturnValue(false)
+    await expect(
+      authorize({ email: 'a@b.com', password: 'x' }, { headers: {} })
+    ).rejects.toThrow('RATE_LIMITED')
+  })
+})

src/app/api/auth/[...nextauth]/route.ts

@@ -0,0 +1,5 @@
+import NextAuth from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+const handler = NextAuth(authOptions)
+export { handler as GET, handler as POST }

src/lib/auth.ts

@@ -0,0 +1,63 @@
+import type { NextAuthOptions } from 'next-auth'
+import CredentialsProvider from 'next-auth/providers/credentials'
+import { compare } from 'bcryptjs'
+import { prisma } from './prisma'
+import { checkRateLimit, recordFailedAttempt, clearAttempts } from './rate-limit'
+
+export const authOptions: NextAuthOptions = {
+  session: {
+    strategy: 'jwt',
+    maxAge: 8 * 60 * 60, // 8 heures
+  },
+  pages: {
+    signIn: '/login',
+  },
+  callbacks: {
+    async jwt({ token, user }) {
+      if (user) {
+        token.role = (user as any).role
+        token.id = user.id
+      }
+      return token
+    },
+    async session({ session, token }) {
+      if (session.user) {
+        (session.user as any).role = token.role
+        ;(session.user as any).id = token.id
+      }
+      return session
+    },
+  },
+  providers: [
+    CredentialsProvider({
+      name: 'Credentials',
+      credentials: {
+        email: { label: 'Email', type: 'email' },
+        password: { label: 'Mot de passe', type: 'password' },
+      },
+      async authorize(credentials, req) {
+        if (!credentials?.email || !credentials?.password) return null
+
+        const ip =
+          (req as any)?.headers?.['x-forwarded-for']?.split(',')[0]?.trim() ?? 'unknown'
+        const key = `${ip}:${credentials.email}`
+
+        if (!checkRateLimit(key)) {
+          throw new Error('RATE_LIMITED')
+        }
+
+        const user = await prisma.user.findUnique({
+          where: { email: credentials.email },
+        })
+
+        if (!user || !(await compare(credentials.password, user.password))) {
+          recordFailedAttempt(key)
+          return null
+        }
+
+        clearAttempts(key)
+        return { id: user.id, email: user.email, name: user.name, role: user.role }
+      },
+    }),
+  ],
+}

src/types/next-auth.d.ts

@@ -0,0 +1,17 @@
+import type { DefaultSession, DefaultJWT } from 'next-auth'
+
+declare module 'next-auth' {
+  interface Session {
+    user: DefaultSession['user'] & {
+      id: string
+      role: string
+    }
+  }
+}
+
+declare module 'next-auth/jwt' {
+  interface JWT extends DefaultJWT {
+    id: string
+    role: string
+  }
+}