text: /*
   * Copyright 2017 Facebook, Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #pragma once
  
  #include <cstdint>
  
  // This must come before the OpenSSL includes.
  #include <folly/portability/Windows.h>
  
  #include <folly/Portability.h>
  
  #include <openssl/opensslv.h>
  
  #include <openssl/asn1.h>
  #include <openssl/bio.h>
  #include <openssl/crypto.h>
  #include <openssl/dh.h>
  #include <openssl/err.h>
  #include <openssl/evp.h>
  #include <openssl/hmac.h>
  #include <openssl/rand.h>
  #include <openssl/rsa.h>
  #include <openssl/sha.h>
  #include <openssl/ssl.h>
  #include <openssl/tls1.h>
  #include <openssl/x509.h>
  #include <openssl/x509v3.h>
  
  #ifndef OPENSSL_NO_EC
  #include <openssl/ec.h>
  #include <openssl/ecdsa.h>
  #endif
  
  // BoringSSL doesn't have notion of versioning although it defines
  // OPENSSL_VERSION_NUMBER to maintain compatibility. The following variables are
  // intended to be specific to OpenSSL.
  #if !defined(OPENSSL_IS_BORINGSSL)
  #define FOLLY_OPENSSL_IS_100                \
    (OPENSSL_VERSION_NUMBER >= 0x10000003L && \
     OPENSSL_VERSION_NUMBER < 0x1000105fL)
  #define FOLLY_OPENSSL_IS_101                \
    (OPENSSL_VERSION_NUMBER >= 0x1000105fL && \
     OPENSSL_VERSION_NUMBER < 0x1000200fL)
  #define FOLLY_OPENSSL_IS_102                \
    (OPENSSL_VERSION_NUMBER >= 0x1000200fL && \
     OPENSSL_VERSION_NUMBER < 0x10100000L)
  #define FOLLY_OPENSSL_IS_110 (OPENSSL_VERSION_NUMBER >= 0x10100000L)
  #endif
  
  #if !OPENSSL_IS_BORINGSSL && !FOLLY_OPENSSL_IS_100 && !FOLLY_OPENSSL_IS_101 && \
      !FOLLY_OPENSSL_IS_102 && !FOLLY_OPENSSL_IS_110
  #warning Compiling with unsupported OpenSSL version
  #endif
  
  // BoringSSL and OpenSSL 0.9.8f later with TLS extension support SNI.
  #if OPENSSL_IS_BORINGSSL || \
      (OPENSSL_VERSION_NUMBER >= 0x00908070L && !defined(OPENSSL_NO_TLSEXT))
  #define FOLLY_OPENSSL_HAS_SNI 1
  #else
  #define FOLLY_OPENSSL_HAS_SNI 0
  #endif
  
  // BoringSSL and OpenSSL 1.0.2 later with TLS extension support ALPN.
  #if OPENSSL_IS_BORINGSSL || \
      (OPENSSL_VERSION_NUMBER >= 0x1000200fL && !defined(OPENSSL_NO_TLSEXT))
  #define FOLLY_OPENSSL_HAS_ALPN 1
  #else
  #define FOLLY_OPENSSL_HAS_ALPN 0
  #endif
  
  // This attempts to "unify" the OpenSSL libcrypto/libssl APIs between
  // OpenSSL 1.0.2, 1.1.0 (and some earlier versions) and BoringSSL. The general
  // idea is to provide namespaced wrapper methods for versions which do not
  // which already exist in BoringSSL and 1.1.0, but there are few APIs such as
  // SSL_CTX_set1_sigalgs_list and so on which exist in 1.0.2 but were removed
  // in BoringSSL
  namespace folly {
  namespace portability {
  namespace ssl {
  
  #if OPENSSL_IS_BORINGSSL
  int SSL_CTX_set1_sigalgs_list(SSL_CTX* ctx, const char* sigalgs_list);
  int TLS1_get_client_version(SSL* s);
  #endif
  
  #if FOLLY_OPENSSL_IS_100
  uint32_t SSL_CIPHER_get_id(const SSL_CIPHER*);
  int TLS1_get_client_version(const SSL*);
  #endif
  
  #if FOLLY_OPENSSL_IS_100 || FOLLY_OPENSSL_IS_101
  int X509_get_signature_nid(X509* cert);
  #endif
  
  #if FOLLY_OPENSSL_IS_100 || FOLLY_OPENSSL_IS_101 || FOLLY_OPENSSL_IS_102
  int SSL_CTX_up_ref(SSL_CTX* session);
  int SSL_SESSION_up_ref(SSL_SESSION* session);
  int X509_up_ref(X509* x);
  int EVP_PKEY_up_ref(EVP_PKEY* evp);
  void RSA_get0_key(
      const RSA* r,
      const BIGNUM** n,
      const BIGNUM** e,
      const BIGNUM** d);
  RSA* EVP_PKEY_get0_RSA(EVP_PKEY* pkey);
  DSA* EVP_PKEY_get0_DSA(EVP_PKEY* pkey);
  DH* EVP_PKEY_get0_DH(EVP_PKEY* pkey);
  EC_KEY* EVP_PKEY_get0_EC_KEY(EVP_PKEY* pkey);
  #endif
  
  #if !FOLLY_OPENSSL_IS_110
  void BIO_meth_free(BIO_METHOD* biom);
  int BIO_meth_set_read(BIO_METHOD* biom, int (*read)(BIO*, char*, int));
  int BIO_meth_set_write(BIO_METHOD* biom, int (*write)(BIO*, const char*, int));
  
  const char* SSL_SESSION_get0_hostname(const SSL_SESSION* s);
  unsigned char* ASN1_STRING_get0_data(const ASN1_STRING* x);
  
  EVP_MD_CTX* EVP_MD_CTX_new();
  void EVP_MD_CTX_free(EVP_MD_CTX* ctx);
  
  HMAC_CTX* HMAC_CTX_new();
  void HMAC_CTX_free(HMAC_CTX* ctx);
  
  unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION* s);
  int SSL_SESSION_has_ticket(const SSL_SESSION* s);
  int DH_set0_pqg(DH* dh, BIGNUM* p, BIGNUM* q, BIGNUM* g);
  void DH_get0_pqg(
      const DH* dh,
      const BIGNUM** p,
      const BIGNUM** q,
      const BIGNUM** g);
  void DH_get0_key(const DH* dh, const BIGNUM** pub_key, const BIGNUM** priv_key);
  
  void DSA_get0_pqg(
      const DSA* dsa,
      const BIGNUM** p,
      const BIGNUM** q,
      const BIGNUM** g);
  void DSA_get0_key(
      const DSA* dsa,
      const BIGNUM** pub_key,
      const BIGNUM** priv_key);
  
  X509* X509_STORE_CTX_get0_cert(X509_STORE_CTX* ctx);
  STACK_OF(X509) * X509_STORE_CTX_get0_chain(X509_STORE_CTX* ctx);
  STACK_OF(X509) * X509_STORE_CTX_get0_untrusted(X509_STORE_CTX* ctx);
  bool RSA_set0_key(RSA* r, BIGNUM* n, BIGNUM* e, BIGNUM* d);
  void RSA_get0_factors(const RSA* r, const BIGNUM** p, const BIGNUM** q);
  void RSA_get0_crt_params(
      const RSA* r,
      const BIGNUM** dmp1,
      const BIGNUM** dmq1,
      const BIGNUM** iqmp);
  int ECDSA_SIG_set0(ECDSA_SIG* sig, BIGNUM* r, BIGNUM* s);
  void ECDSA_SIG_get0(const ECDSA_SIG* sig, const BIGNUM** pr, const BIGNUM** ps);
  
  using OPENSSL_INIT_SETTINGS = void;
  int OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS* settings);
  void OPENSSL_cleanup();
  
  const ASN1_INTEGER* X509_REVOKED_get0_serialNumber(const X509_REVOKED* r);
  const ASN1_TIME* X509_REVOKED_get0_revocationDate(const X509_REVOKED* r);
  
  #endif
  
  #if FOLLY_OPENSSL_IS_110
  // Note: this was a type and has been fixed upstream, so the next 1.1.0
  // minor version upgrade will need to remove this
  #define OPENSSL_lh_new OPENSSL_LH_new
  
  // OpenSSL v1.1.0 removed support for SSLv2, and also removed the define that
  // indicates it isn't supported.
  #define OPENSSL_NO_SSL2
  #endif
  }
  }
  }
  
  FOLLY_PUSH_WARNING
  #if __CLANG_PREREQ(3, 0)
  FOLLY_GCC_DISABLE_WARNING("-Wheader-hygiene")
  #endif
  /* using override */ using namespace folly::portability::ssl;
  FOLLY_POP_WARNING
  