2 files changed, 168 insertions, 0 deletions
diff --git a/lib/saml/idp-metadata.ts b/lib/saml/idp-metadata.ts
new file mode 100644
index 00000000..a33ecad6
--- /dev/null
+++ b/lib/saml/idp-metadata.ts
@@ -0,0 +1,86 @@
+// SAML Identity Provider (IdP) 메타데이터 유틸리티
+
+export interface IDPMetadata {
+  entityId: string
+  ssoUrl: string
+  sloUrl?: string
+  certificate: string
+  nameIdFormat: string
+  organization: string
+  wantAuthnRequestsSigned: boolean
+}
+
+// IdP 메타데이터 가져오기 (환경변수 기반)
+export function getIDPMetadata(): IDPMetadata {
+  console.log('🔍 Loading IdP metadata from environment variables...')
+  
+  // 필수 환경변수 검증
+  const entityId = process.env.SAML_IDP_ENTITY_ID
+  const ssoUrl = process.env.SAML_IDP_SSO_URL
+  const certificate = process.env.SAML_IDP_CERT
+  
+  if (!entityId || !ssoUrl || !certificate) {
+    throw new Error('Required SAML IdP environment variables are missing: SAML_IDP_ENTITY_ID, SAML_IDP_SSO_URL, SAML_IDP_CERT')
+  }
+
+  const metadata: IDPMetadata = {
+    entityId,
+    ssoUrl,
+    sloUrl: process.env.SAML_IDP_SLO_URL,
+    certificate,
+    nameIdFormat: process.env.SAML_IDP_NAME_ID_FORMAT || 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
+    organization: process.env.SAML_IDP_ORGANIZATION || 'Unknown Organization',
+    wantAuthnRequestsSigned: process.env.SAML_IDP_WANT_AUTHN_REQUESTS_SIGNED === 'true'
+  }
+
+  console.log('✅ IdP metadata loaded from environment variables:', {
+    entityId,
+    ssoUrl,
+    sloUrl: metadata.sloUrl,
+    organization: metadata.organization,
+    wantAuthnRequestsSigned: metadata.wantAuthnRequestsSigned
+  })
+
+  return metadata
+}
+
+// 인증서 형식 정규화 (PEM 형식으로 변환)
+export function normalizeCertificate(cert: string): string {
+  // 이미 PEM 형식인 경우 그대로 반환
+  if (cert.includes('-----BEGIN CERTIFICATE-----')) {
+    return cert
+  }
+  
+  // Base64 인증서를 PEM 형식으로 변환 (64자마다 줄바꿈)
+  const cleanCert = cert.replace(/\s+/g, '')
+  const formattedCert = cleanCert.match(/.{1,64}/g)?.join('\n') || cleanCert
+  return `-----BEGIN CERTIFICATE-----\n${formattedCert}\n-----END CERTIFICATE-----`
+}
+
+// 특정 용도의 인증서 가져오기
+export function getCertificateByUse(metadata: IDPMetadata, use: 'signing' | 'encryption'): string {
+  const cert = metadata.certificates.find(c => c.use === use)
+  return cert ? normalizeCertificate(cert.certificate) : ''
+}
+
+// 모든 인증서를 PEM 형식으로 변환
+export function getAllCertificatesAsPEM(metadata: IDPMetadata): { use: string; pem: string }[] {
+  return metadata.certificates.map(cert => ({
+    use: cert.use,
+    pem: normalizeCertificate(cert.certificate)
+  }))
+}
+
+// 레거시 호환성을 위한 함수 - 첫 번째 인증서를 문자열로 반환
+export function getFirstCertificateAsString(metadata: IDPMetadata): string {
+  return metadata.certificates[0]?.certificate || ''
+}
+
+// SP 메타데이터 생성을 위한 헬퍼
+export function getSPEntityId(): string {
+  return process.env.SAML_SP_ENTITY_ID || `${process.env.NEXTAUTH_URL}/saml/metadata`
+}
+
+export function getSPCallbackUrl(): string {
+  return `${process.env.NEXTAUTH_URL}/api/saml/callback`
+} 
+\ No newline at end of file
diff --git a/lib/saml/sp-metadata.ts b/lib/saml/sp-metadata.ts
new file mode 100644
index 00000000..7f25f602
--- /dev/null
+++ b/lib/saml/sp-metadata.ts
@@ -0,0 +1,82 @@
+// SAML Service Provider (SP) 메타데이터 유틸리티
+
+export interface SPAssertionConsumerService {
+  binding: string
+  location: string
+  index: number
+  isDefault?: boolean
+}
+
+export interface SPMetadata {
+  entityId: string
+  // SPSSODescriptor 속성들
+  protocolSupportEnumeration: string[]
+  authnRequestsSigned: boolean
+  wantAssertionsSigned: boolean
+  // 서비스 엔드포인트들
+  assertionConsumerServices: SPAssertionConsumerService[]
+  // 편의를 위한 기본값들
+  defaultACS: SPAssertionConsumerService
+  callbackUrl: string
+}
+
+// SP 메타데이터 가져오기 (환경변수 기반)
+export function getSPMetadata(): SPMetadata {
+  console.log('🔍 Loading SP metadata from environment variables...')
+  
+  // 필수 환경변수 검증
+  const entityId = process.env.SAML_SP_ENTITY_ID
+  const callbackUrl = process.env.SAML_SP_CALLBACK_URL || `${process.env.NEXTAUTH_URL}/api/saml/callback`
+  
+  if (!entityId) {
+    throw new Error('Required SAML environment variable is missing: SAML_SP_ENTITY_ID')
+  }
+
+  if (!callbackUrl) {
+    throw new Error('SAML_SP_CALLBACK_URL or NEXTAUTH_URL environment variable is required')
+  }
+
+  // AssertionConsumerService 구성
+  const assertionConsumerServices: SPAssertionConsumerService[] = [
+    // 기본 HTTP-POST 바인딩
+    {
+      binding: process.env.SAML_SP_ACS_BINDING_PRIMARY || 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST',
+      location: callbackUrl,
+      index: 0,
+      isDefault: true
+    }
+  ]
+
+  // 보조 HTTP-Redirect 바인딩 (선택사항)
+  const secondaryBinding = process.env.SAML_SP_ACS_BINDING_SECONDARY
+  if (secondaryBinding) {
+    assertionConsumerServices.push({
+      binding: secondaryBinding,
+      location: callbackUrl,
+      index: 1,
+      isDefault: false
+    })
+  }
+
+  const metadata: SPMetadata = {
+    entityId,
+    protocolSupportEnumeration: [
+      process.env.SAML_SP_PROTOCOL_SUPPORT || 'urn:oasis:names:tc:SAML:2.0:protocol'
+    ],
+    authnRequestsSigned: process.env.SAML_SP_AUTHN_REQUESTS_SIGNED === 'true',
+    wantAssertionsSigned: process.env.SAML_SP_WANT_ASSERTIONS_SIGNED === 'true',
+    assertionConsumerServices,
+    defaultACS: assertionConsumerServices[0],
+    callbackUrl
+  }
+
+  console.log('✅ SP metadata loaded from environment variables:', {
+    entityId,
+    callbackUrl,
+    authnRequestsSigned: metadata.authnRequestsSigned,
+    wantAssertionsSigned: metadata.wantAssertionsSigned,
+    acsCount: assertionConsumerServices.length
+  })
+
+  return metadata
+} 
+\ No newline at end of file