feat:E-Sign 서명 인증을 MNG 자체 API로 전환

기존: 브라우저 → 외부 API 서버(api.codebridge-x.com) 호출
변경: 브라우저 → MNG 자체 엔드포인트(/esign/sign/{token}/api/*) 호출

- EsignPublicController에 getContract/sendOtp/verifyOtp API 추가
- auth.blade.php에서 외부 API 호출을 MNG 자체 API로 변경
- EsignOtpMail Mailable + 이메일 템플릿 추가
- CSRF 예외에 esign/sign/*/api/* 추가
- 로컬/서버 환경 모두에서 동작

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

app/Http/Controllers/ESign/EsignPublicController.php

@@ -3,11 +3,18 @@
 namespace App\Http\Controllers\ESign;
 
 use App\Http\Controllers\Controller;
+use App\Models\ESign\EsignAuditLog;
+use App\Models\ESign\EsignContract;
+use App\Models\ESign\EsignSigner;
+use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use Illuminate\Support\Str;
 use Illuminate\View\View;
 
 class EsignPublicController extends Controller
 {
+    // ─── 화면 라우트 ───
+
     public function auth(string $token): View
     {
         return view('esign.sign.auth', ['token' => $token]);
@@ -22,4 +29,167 @@ public function done(string $token): View
     {
         return view('esign.sign.done', ['token' => $token]);
     }
+
+    // ─── 서명 API (토큰 기반, 비인증) ───
+
+    /**
+     * 토큰으로 계약/서명자 정보 조회
+     */
+    public function getContract(string $token): JsonResponse
+    {
+        $signer = EsignSigner::withoutGlobalScopes()
+            ->where('access_token', $token)
+            ->first();
+
+        if (! $signer) {
+            return response()->json(['success' => false, 'message' => '유효하지 않은 서명 링크입니다.'], 404);
+        }
+
+        if ($signer->token_expires_at && $signer->token_expires_at->isPast()) {
+            return response()->json(['success' => false, 'message' => '서명 링크가 만료되었습니다.'], 400);
+        }
+
+        $contract = EsignContract::withoutGlobalScopes()
+            ->with(['signers:id,contract_id,name,role,status,signed_at'])
+            ->find($signer->contract_id);
+
+        if (! $contract) {
+            return response()->json(['success' => false, 'message' => '계약을 찾을 수 없습니다.'], 404);
+        }
+
+        EsignAuditLog::create([
+            'tenant_id' => $contract->tenant_id,
+            'contract_id' => $contract->id,
+            'signer_id' => $signer->id,
+            'action' => 'viewed',
+            'ip_address' => request()->ip(),
+            'user_agent' => request()->userAgent(),
+            'created_at' => now(),
+        ]);
+
+        return response()->json([
+            'success' => true,
+            'data' => [
+                'contract' => $contract,
+                'signer' => [
+                    'id' => $signer->id,
+                    'name' => $signer->name,
+                    'email' => $signer->email,
+                    'role' => $signer->role,
+                    'status' => $signer->status,
+                ],
+            ],
+        ]);
+    }
+
+    /**
+     * OTP 발송
+     */
+    public function sendOtp(string $token): JsonResponse
+    {
+        $signer = $this->findSigner($token);
+        if (! $signer) {
+            return response()->json(['success' => false, 'message' => '유효하지 않은 서명 링크입니다.'], 404);
+        }
+
+        $contract = EsignContract::withoutGlobalScopes()->find($signer->contract_id);
+        if (! $contract || ! in_array($contract->status, ['pending', 'partially_signed'])) {
+            return response()->json(['success' => false, 'message' => '서명할 수 없는 상태입니다.'], 400);
+        }
+
+        $otpCode = str_pad(random_int(0, 999999), 6, '0', STR_PAD_LEFT);
+
+        $signer->update([
+            'otp_code' => $otpCode,
+            'otp_expires_at' => now()->addMinutes(5),
+            'otp_attempts' => 0,
+        ]);
+
+        // OTP 이메일 발송
+        \Illuminate\Support\Facades\Mail::to($signer->email)->send(
+            new \App\Mail\EsignOtpMail($signer->name, $otpCode)
+        );
+
+        EsignAuditLog::create([
+            'tenant_id' => $contract->tenant_id,
+            'contract_id' => $contract->id,
+            'signer_id' => $signer->id,
+            'action' => 'otp_sent',
+            'ip_address' => request()->ip(),
+            'user_agent' => request()->userAgent(),
+            'metadata' => ['email' => $signer->email],
+            'created_at' => now(),
+        ]);
+
+        return response()->json(['success' => true, 'message' => '인증 코드가 발송되었습니다.']);
+    }
+
+    /**
+     * OTP 검증
+     */
+    public function verifyOtp(Request $request, string $token): JsonResponse
+    {
+        $signer = $this->findSigner($token);
+        if (! $signer) {
+            return response()->json(['success' => false, 'message' => '유효하지 않은 서명 링크입니다.'], 404);
+        }
+
+        if ($signer->otp_attempts >= 5) {
+            return response()->json(['success' => false, 'message' => '인증 시도 횟수를 초과했습니다.'], 400);
+        }
+
+        if (! $signer->otp_code || ! $signer->otp_expires_at) {
+            return response()->json(['success' => false, 'message' => '인증 코드가 발송되지 않았습니다.'], 400);
+        }
+
+        if ($signer->otp_expires_at->isPast()) {
+            return response()->json(['success' => false, 'message' => '인증 코드가 만료되었습니다.'], 400);
+        }
+
+        $signer->increment('otp_attempts');
+
+        $otpCode = $request->input('otp_code');
+        if ($signer->otp_code !== $otpCode) {
+            return response()->json(['success' => false, 'message' => '인증 코드가 올바르지 않습니다.'], 400);
+        }
+
+        $contract = EsignContract::withoutGlobalScopes()->find($signer->contract_id);
+
+        $signer->update([
+            'auth_verified_at' => now(),
+            'otp_code' => null,
+            'otp_expires_at' => null,
+            'status' => 'authenticated',
+        ]);
+
+        EsignAuditLog::create([
+            'tenant_id' => $contract->tenant_id,
+            'contract_id' => $contract->id,
+            'signer_id' => $signer->id,
+            'action' => 'authenticated',
+            'ip_address' => request()->ip(),
+            'user_agent' => request()->userAgent(),
+            'created_at' => now(),
+        ]);
+
+        return response()->json([
+            'success' => true,
+            'data' => ['sign_session_token' => Str::random(64)],
+        ]);
+    }
+
+    // ─── Private ───
+
+    private function findSigner(string $token): ?EsignSigner
+    {
+        $signer = EsignSigner::withoutGlobalScopes()
+            ->where('access_token', $token)
+            ->first();
+
+        if ($signer && $signer->token_expires_at && $signer->token_expires_at->isPast()) {
+            return null;
+        }
+
+        return $signer;
+    }
 }

app/Mail/EsignOtpMail.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Mail;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class EsignOtpMail extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public function __construct(
+        public string $signerName,
+        public string $otpCode,
+    ) {}
+
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: '[SAM] 전자계약 인증 코드',
+        );
+    }
+
+    public function content(): Content
+    {
+        return new Content(
+            html: 'emails.esign.otp',
+            with: [
+                'signerName' => $this->signerName,
+                'otpCode' => $this->otpCode,
+            ],
+        );
+    }
+}

bootstrap/app.php

@@ -26,6 +26,7 @@
             'menu-sync/*',
             'common-code-sync/*',
             'category-sync/*',
+            'esign/sign/*/api/*',
         ]);
 
         // web 미들웨어 그룹에 자동 재인증 추가

resources/views/emails/esign/otp.blade.php

@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html lang="ko">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>인증 코드</title>
+</head>
+<body style="margin: 0; padding: 0; background-color: #f5f5f5; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;">
+    <table width="100%" cellpadding="0" cellspacing="0" style="padding: 40px 20px;">
+        <tr>
+            <td align="center">
+                <table width="600" cellpadding="0" cellspacing="0" style="background-color: #ffffff; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.1);">
+                    <tr>
+                        <td style="background-color: #2563eb; padding: 32px 40px; text-align: center;">
+                            <h1 style="margin: 0; color: #ffffff; font-size: 24px; font-weight: 600;">인증 코드</h1>
+                        </td>
+                    </tr>
+                    <tr>
+                        <td style="padding: 40px;">
+                            <p style="margin: 0 0 16px; font-size: 16px; color: #333;">안녕하세요, <strong>{{ $signerName }}</strong>님.</p>
+                            <p style="margin: 0 0 24px; font-size: 15px; color: #555; line-height: 1.6;">
+                                전자계약 서명을 위한 인증 코드입니다.<br>
+                                아래 코드를 입력해 주세요.
+                            </p>
+                            <table width="100%" cellpadding="0" cellspacing="0">
+                                <tr>
+                                    <td align="center" style="padding: 16px 0;">
+                                        <div style="display: inline-block; background-color: #f8fafc; border: 2px solid #e5e7eb; border-radius: 8px; padding: 20px 40px;">
+                                            <span style="font-size: 36px; font-weight: 700; letter-spacing: 12px; color: #2563eb;">{{ $otpCode }}</span>
+                                        </div>
+                                    </td>
+                                </tr>
+                            </table>
+                            <p style="margin: 24px 0 0; font-size: 13px; color: #999; line-height: 1.6;">
+                                이 코드는 5분간 유효합니다. 본인이 요청하지 않았다면 이 메일을 무시해 주세요.
+                            </p>
+                        </td>
+                    </tr>
+                    <tr>
+                        <td style="background-color: #f8fafc; padding: 24px 40px; text-align: center; border-top: 1px solid #e5e7eb;">
+                            <p style="margin: 0; font-size: 12px; color: #999;">
+                                본 메일은 SAM 전자계약 시스템에서 자동 발송되었습니다.
+                            </p>
+                        </td>
+                    </tr>
+                </table>
+            </td>
+        </tr>
+    </table>
+</body>
+</html>

resources/views/esign/sign/auth.blade.php

@@ -19,8 +19,6 @@
 const { useState, useEffect, useCallback } = React;
 
 const TOKEN = document.getElementById('esign-auth-root')?.dataset.token;
-const API = window.SAM_CONFIG?.apiBaseUrl || '{{ config("services.api.base_url", "") }}';
-const API_KEY = '{{ config("services.api.key", "") }}';
 
 const App = () => {
     const [contract, setContract] = useState(null);
@@ -33,8 +31,8 @@
 
     const fetchContract = useCallback(async () => {
         try {
-            const res = await fetch(`${API}/api/v1/esign/sign/${TOKEN}`, {
-                headers: { 'Accept': 'application/json', 'X-API-Key': API_KEY },
+            const res = await fetch(`/esign/sign/${TOKEN}/api/contract`, {
+                headers: { 'Accept': 'application/json' },
             });
             const json = await res.json();
             if (json.success) {
@@ -55,9 +53,9 @@
         setOtpSending(true);
         setError('');
         try {
-            const res = await fetch(`${API}/api/v1/esign/sign/${TOKEN}/otp/send`, {
+            const res = await fetch(`/esign/sign/${TOKEN}/api/otp/send`, {
                 method: 'POST',
-                headers: { 'Accept': 'application/json', 'Content-Type': 'application/json', 'X-API-Key': API_KEY },
+                headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' },
             });
             const json = await res.json();
             if (json.success) {
@@ -74,9 +72,9 @@
         setVerifying(true);
         setError('');
         try {
-            const res = await fetch(`${API}/api/v1/esign/sign/${TOKEN}/otp/verify`, {
+            const res = await fetch(`/esign/sign/${TOKEN}/api/otp/verify`, {
                 method: 'POST',
-                headers: { 'Accept': 'application/json', 'Content-Type': 'application/json', 'X-API-Key': API_KEY },
+                headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' },
                 body: JSON.stringify({ otp_code: otp }),
             });
             const json = await res.json();

routes/web.php

@@ -1422,7 +1422,13 @@
 |--------------------------------------------------------------------------
 */
 Route::prefix('esign/sign')->group(function () {
+    // 화면 라우트
     Route::get('/{token}', [EsignPublicController::class, 'auth'])->name('esign.sign.auth');
     Route::get('/{token}/sign', [EsignPublicController::class, 'sign'])->name('esign.sign.do');
     Route::get('/{token}/done', [EsignPublicController::class, 'done'])->name('esign.sign.done');
+
+    // 서명 API (토큰 기반, 비인증)
+    Route::get('/{token}/api/contract', [EsignPublicController::class, 'getContract'])->name('esign.sign.api.contract');
+    Route::post('/{token}/api/otp/send', [EsignPublicController::class, 'sendOtp'])->name('esign.sign.api.otp.send');
+    Route::post('/{token}/api/otp/verify', [EsignPublicController::class, 'verifyOtp'])->name('esign.sign.api.otp.verify');
 });