text: /*
  <<<<<<< HEAD
   * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
  =======
   * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
  >>>>>>> 6e3ba20dc49ccbf12ff4c27a4d8b84dcbeb71654
   * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
   * Copyright 2005 Nokia. All rights reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include <stdio.h>
  #include <ctype.h>
  #include <openssl/objects.h>
  #include <openssl/comp.h>
  #include <openssl/engine.h>
  #include <openssl/crypto.h>
  #include <openssl/conf.h>
  #include <openssl/trace.h>
  #include "internal/nelem.h"
  #include "ssl_local.h"
  #include "internal/thread_once.h"
  #include "internal/cryptlib.h"
  
  /* NB: make sure indices in these tables match values above */
  
  typedef struct {
      uint32_t mask;
      int nid;
  } ssl_cipher_table;
  
  /* Table of NIDs for each cipher */
  static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
      {SSL_DES, NID_des_cbc},     /* SSL_ENC_DES_IDX 0 */
      {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
      {SSL_RC4, NID_rc4},         /* SSL_ENC_RC4_IDX 2 */
      {SSL_RC2, NID_rc2_cbc},     /* SSL_ENC_RC2_IDX 3 */
      {SSL_IDEA, NID_idea_cbc},   /* SSL_ENC_IDEA_IDX 4 */
      {SSL_eNULL, NID_undef},     /* SSL_ENC_NULL_IDX 5 */
      {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
      {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
      {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
      {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
      {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
      {SSL_SEED, NID_seed_cbc},   /* SSL_ENC_SEED_IDX 11 */
      {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
      {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
      {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
      {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
      {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
      {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
      {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */
      {SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */
      {SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */
      {SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */
      {SSL_MAGMA, NID_magma_ctr_acpkm}, /* SSL_ENC_MAGMA_IDX */
      {SSL_KUZNYECHIK, NID_kuznyechik_ctr_acpkm}, /* SSL_ENC_KUZNYECHIK_IDX */
  };
  
  #define SSL_COMP_NULL_IDX       0
  #define SSL_COMP_ZLIB_IDX       1
  #define SSL_COMP_NUM_IDX        2
  
  static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
  
  #ifndef OPENSSL_NO_COMP
  static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
  #endif
  
  <<<<<<< HEAD
  =======
  /*
   * Constant SSL_MAX_DIGEST equal to size of digests array should be defined
   * in the ssl_local.h
   */
  
  #define SSL_MD_NUM_IDX  SSL_MAX_DIGEST
  
  >>>>>>> 6e3ba20dc49ccbf12ff4c27a4d8b84dcbeb71654
  /* NB: make sure indices in this table matches values above */
  static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
      {SSL_MD5, NID_md5},         /* SSL_MD_MD5_IDX 0 */
      {SSL_SHA1, NID_sha1},       /* SSL_MD_SHA1_IDX 1 */
      {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
      {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
      {SSL_SHA256, NID_sha256},   /* SSL_MD_SHA256_IDX 4 */
      {SSL_SHA384, NID_sha384},   /* SSL_MD_SHA384_IDX 5 */
      {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
      {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
      {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
      {0, NID_md5_sha1},          /* SSL_MD_MD5_SHA1_IDX 9 */
      {0, NID_sha224},            /* SSL_MD_SHA224_IDX 10 */
      {0, NID_sha512},            /* SSL_MD_SHA512_IDX 11 */
      {SSL_MAGMAOMAC, NID_magma_mac}, /* sSL_MD_MAGMAOMAC_IDX */
      {SSL_KUZNYECHIKOMAC, NID_kuznyechik_mac} /* SSL_MD_KUZNYECHIKOMAC_IDX */
  };
  
  /* *INDENT-OFF* */
  static const ssl_cipher_table ssl_cipher_table_kx[] = {
      {SSL_kRSA,      NID_kx_rsa},
      {SSL_kECDHE,    NID_kx_ecdhe},
      {SSL_kDHE,      NID_kx_dhe},
      {SSL_kECDHEPSK, NID_kx_ecdhe_psk},
      {SSL_kDHEPSK,   NID_kx_dhe_psk},
      {SSL_kRSAPSK,   NID_kx_rsa_psk},
      {SSL_kPSK,      NID_kx_psk},
      {SSL_kSRP,      NID_kx_srp},
      {SSL_kGOST,     NID_kx_gost},
      {SSL_kGOST18,   NID_kx_gost18},
      {SSL_kANY,      NID_kx_any}
  };
  
  static const ssl_cipher_table ssl_cipher_table_auth[] = {
      {SSL_aRSA,    NID_auth_rsa},
      {SSL_aECDSA,  NID_auth_ecdsa},
      {SSL_aPSK,    NID_auth_psk},
      {SSL_aDSS,    NID_auth_dss},
      {SSL_aGOST01, NID_auth_gost01},
      {SSL_aGOST12, NID_auth_gost12},
      {SSL_aSRP,    NID_auth_srp},
      {SSL_aNULL,   NID_auth_null},
      {SSL_aANY,    NID_auth_any}
  };
  /* *INDENT-ON* */
  
  /* Utility function for table lookup */
  static int ssl_cipher_info_find(const ssl_cipher_table * table,
                                  size_t table_cnt, uint32_t mask)
  {
      size_t i;
      for (i = 0; i < table_cnt; i++, table++) {
          if (table->mask == mask)
              return (int)i;
      }
      return -1;
  }
  
  #define ssl_cipher_info_lookup(table, x) \
      ssl_cipher_info_find(table, OSSL_NELEM(table), x)
  
  /*
   * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
   * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
   * found
   */
  static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
      /* MD5, SHA, GOST94, MAC89 */
      EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
      /* SHA256, SHA384, GOST2012_256, MAC89-12 */
      EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
      /* GOST2012_512 */
      EVP_PKEY_HMAC,
  <<<<<<< HEAD
      /* MD5/SHA1, SHA224, SHA512, MAGMAOMAC, KUZNYECHIKOMAC */
      NID_undef, NID_undef, NID_undef, NID_undef, NID_undef
  =======
      /* MD5/SHA1, SHA224, SHA512 */
      NID_undef, NID_undef, NID_undef
  >>>>>>> 6e3ba20dc49ccbf12ff4c27a4d8b84dcbeb71654
  };
  
  #define CIPHER_ADD      1
  #define CIPHER_KILL     2
  #define CIPHER_DEL      3
  #define CIPHER_ORD      4
  #define CIPHER_SPECIAL  5
  /*
   * Bump the ciphers to the top of the list.
   * This rule isn't currently supported by the public cipherstring API.
   */
  #define CIPHER_BUMP     6
  
  typedef struct cipher_order_st {
      const SSL_CIPHER *cipher;
      int active;
      int dead;
      struct cipher_order_st *next, *prev;
  } CIPHER_ORDER;
  
  static const SSL_CIPHER cipher_aliases[] = {
      /* "ALL" doesn't include eNULL (must be specifically enabled) */
      {0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL},
      /* "COMPLEMENTOFALL" */
      {0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL},
  
      /*
       * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
       * ALL!)
       */
      {0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
  
      /*
       * key exchange aliases (some of those using only a single bit here
       * combine multiple key exchange algs according to the RFCs, e.g. kDHE
       * combines DHE_DSS and DHE_RSA)
       */
      {0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA},
  
      {0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE},
      {0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE},
      {0, SSL_TXT_DH, NULL, 0, SSL_kDHE},
  
      {0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE},
      {0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE},
      {0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE},
  
      {0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK},
      {0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK},
      {0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK},
      {0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK},
      {0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP},
      {0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST},
      {0, SSL_TXT_kGOST18, NULL, 0, SSL_kGOST18},
  
      /* server authentication aliases */
      {0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA},
      {0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS},
      {0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS},
      {0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL},
      {0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA},
      {0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA},
      {0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK},
      {0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01},
      {0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12},
      {0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12},
      {0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP},
  
      /* aliases combining key exchange and server authentication */
      {0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL},
      {0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL},
      {0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
      {0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
      {0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL},
      {0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA},
      {0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL},
      {0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL},
      {0, SSL_TXT_PSK, NULL, 0, SSL_PSK},
      {0, SSL_TXT_SRP, NULL, 0, SSL_kSRP},
  
      /* symmetric encryption aliases */
      {0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES},
      {0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4},
      {0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2},
      {0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA},
      {0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED},
      {0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL},
      {0, SSL_TXT_GOST, NULL, 0, 0, 0,
       SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12 | SSL_MAGMA | SSL_KUZNYECHIK},
      {0, SSL_TXT_AES128, NULL, 0, 0, 0,
       SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
      {0, SSL_TXT_AES256, NULL, 0, 0, 0,
       SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
      {0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES},
      {0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
      {0, SSL_TXT_AES_CCM, NULL, 0, 0, 0,
       SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
      {0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
      {0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128},
      {0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256},
      {0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA},
      {0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20},
      {0, SSL_TXT_GOST2012_GOST8912_GOST8912, NULL, 0, 0, 0, SSL_eGOST2814789CNT12},
  
      {0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA},
      {0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM},
      {0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM},
      {0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM},
      {0, SSL_TXT_CBC, NULL, 0, 0, 0, SSL_CBC},
  
      /* MAC aliases */
      {0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5},
      {0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1},
      {0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1},
      {0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94},
      {0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
      {0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256},
      {0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384},
      {0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256},
  
      /* protocol version aliases */
      {0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION},
      {0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
      {0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
      {0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION},
  
      /* strength classes */
      {0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
      {0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
      {0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
      /* FIPS 140-2 approved ciphersuite */
      {0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
  
      /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
      {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0,
       SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
      {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0,
       SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
  
  };
  
  /*
   * Search for public key algorithm with given name and return its pkey_id if
   * it is available. Otherwise return 0
   */
  #ifdef OPENSSL_NO_ENGINE
  
  static int get_optional_pkey_id(const char *pkey_name)
  {
      const EVP_PKEY_ASN1_METHOD *ameth;
      int pkey_id = 0;
      ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
      if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
                                           ameth) > 0)
          return pkey_id;
      return 0;
  }
  
  #else
  
  static int get_optional_pkey_id(const char *pkey_name)
  {
      const EVP_PKEY_ASN1_METHOD *ameth;
      ENGINE *tmpeng = NULL;
      int pkey_id = 0;
      ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
      if (ameth) {
          if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
                                      ameth) <= 0)
              pkey_id = 0;
      }
      tls_engine_finish(tmpeng);
      return pkey_id;
  }
  
  #endif
  
  int ssl_load_ciphers(SSL_CTX *ctx)
  {
      size_t i;
      const ssl_cipher_table *t;
  
      ctx->disabled_enc_mask = 0;
      for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
          if (t->nid != NID_undef) {
              const EVP_CIPHER *cipher
                  = ssl_evp_cipher_fetch(ctx->libctx, t->nid, ctx->propq);
  
              ctx->ssl_cipher_methods[i] = cipher;
              if (cipher == NULL)
                  ctx->disabled_enc_mask |= t->mask;
          }
      }
      ctx->disabled_mac_mask = 0;
      for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
          const EVP_MD *md
              = ssl_evp_md_fetch(ctx->libctx, t->nid, ctx->propq);
  
          ctx->ssl_digest_methods[i] = md;
          if (md == NULL) {
              ctx->disabled_mac_mask |= t->mask;
          } else {
              int tmpsize = EVP_MD_size(md);
              if (!ossl_assert(tmpsize >= 0))
                  return 0;
              ctx->ssl_mac_secret_size[i] = tmpsize;
          }
      }
  
      ctx->disabled_mkey_mask = 0;
      ctx->disabled_auth_mask = 0;
  
  #ifdef OPENSSL_NO_DSA
      ctx->disabled_auth_mask |= SSL_aDSS;
  #endif
  #ifdef OPENSSL_NO_DH
      ctx->disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
  #endif
  #ifdef OPENSSL_NO_EC
      ctx->disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK;
      ctx->disabled_auth_mask |= SSL_aECDSA;
  #endif
  #ifdef OPENSSL_NO_PSK
      ctx->disabled_mkey_mask |= SSL_PSK;
      ctx->disabled_auth_mask |= SSL_aPSK;
  #endif
  #ifdef OPENSSL_NO_SRP
      ctx->disabled_mkey_mask |= SSL_kSRP;
  #endif
  
      /*
       * Check for presence of GOST 34.10 algorithms, and if they are not
       * present, disable appropriate auth and key exchange
       */
      ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id(SN_id_Gost28147_89_MAC);
      if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX])
          ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
      else
          ctx->disabled_mac_mask |= SSL_GOST89MAC;
  
      ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] =
          get_optional_pkey_id(SN_gost_mac_12);
      if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX])
          ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
      else
          ctx->disabled_mac_mask |= SSL_GOST89MAC12;
  
      ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX] =
          get_optional_pkey_id(SN_magma_mac);
      if (ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX])
          ctx->ssl_mac_secret_size[SSL_MD_MAGMAOMAC_IDX] = 32;
      else
          ctx->disabled_mac_mask |= SSL_MAGMAOMAC;
  
      ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX] =
          get_optional_pkey_id(SN_kuznyechik_mac);
      if (ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX])
          ctx->ssl_mac_secret_size[SSL_MD_KUZNYECHIKOMAC_IDX] = 32;
      else
          ctx->disabled_mac_mask |= SSL_KUZNYECHIKOMAC;
  
      if (!get_optional_pkey_id(SN_id_GostR3410_2001))
          ctx->disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
      if (!get_optional_pkey_id(SN_id_GostR3410_2012_256))
          ctx->disabled_auth_mask |= SSL_aGOST12;
      if (!get_optional_pkey_id(SN_id_GostR3410_2012_512))
          ctx->disabled_auth_mask |= SSL_aGOST12;
      /*
       * Disable GOST key exchange if no GOST signature algs are available *
       */
      if ((ctx->disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
          (SSL_aGOST01 | SSL_aGOST12))
          ctx->disabled_mkey_mask |= SSL_kGOST;
  
      if ((ctx->disabled_auth_mask & SSL_aGOST12) ==  SSL_aGOST12)
          ctx->disabled_mkey_mask |= SSL_kGOST18;
  
      return 1;
  }
  
  #ifndef OPENSSL_NO_COMP
  
  static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
  {
      return ((*a)->id - (*b)->id);
  }
  
  DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions)
  {
      SSL_COMP *comp = NULL;
      COMP_METHOD *method = COMP_zlib();
  
      ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
  
      if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) {
          comp = OPENSSL_malloc(sizeof(*comp));
          if (comp != NULL) {
              comp->method = method;
              comp->id = SSL_COMP_ZLIB_IDX;
              comp->name = COMP_get_name(method);
              sk_SSL_COMP_push(ssl_comp_methods, comp);
              sk_SSL_COMP_sort(ssl_comp_methods);
          }
      }
      return 1;
  }
  
  static int load_builtin_compressions(void)
  {
      return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions);
  }
  #endif
  
  int ssl_cipher_get_evp_cipher(SSL_CTX *ctx, const SSL_CIPHER *sslc,
                                const EVP_CIPHER **enc)
  {
      int i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, sslc->algorithm_enc);
  
      if (i == -1) {
          *enc = NULL;
      } else {
          if (i == SSL_ENC_NULL_IDX) {
              /*
               * We assume we don't care about this coming from an ENGINE so
               * just do a normal EVP_CIPHER_fetch instead of
               * ssl_evp_cipher_fetch()
               */
              *enc = EVP_CIPHER_fetch(ctx->libctx, "NULL", ctx->propq);
              if (*enc == NULL)
                  return 0;
          } else {
              const EVP_CIPHER *cipher = ctx->ssl_cipher_methods[i];
  
              if (cipher == NULL
                      || !ssl_evp_cipher_up_ref(cipher))
                  return 0;
              *enc = ctx->ssl_cipher_methods[i];
          }
      }
      return 1;
  }
  
  int ssl_cipher_get_evp(SSL_CTX *ctx, const SSL_SESSION *s,
                         const EVP_CIPHER **enc, const EVP_MD **md,
                         int *mac_pkey_type, size_t *mac_secret_size,
                         SSL_COMP **comp, int use_etm)
  {
      int i;
      const SSL_CIPHER *c;
  
      c = s->cipher;
      if (c == NULL)
          return 0;
      if (comp != NULL) {
          SSL_COMP ctmp;
  #ifndef OPENSSL_NO_COMP
          if (!load_builtin_compressions()) {
              /*
               * Currently don't care, since a failure only means that
               * ssl_comp_methods is NULL, which is perfectly OK
               */
          }
  #endif
          *comp = NULL;
          ctmp.id = s->compress_meth;
          if (ssl_comp_methods != NULL) {
              i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
              *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
          }
          /* If were only interested in comp then return success */
          if ((enc == NULL) && (md == NULL))
              return 1;
      }
  
      if ((enc == NULL) || (md == NULL))
          return 0;
  
      if (!ssl_cipher_get_evp_cipher(ctx, c, enc))
          return 0;
  
      i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
      if (i == -1) {
          *md = NULL;
          if (mac_pkey_type != NULL)
              *mac_pkey_type = NID_undef;
          if (mac_secret_size != NULL)
              *mac_secret_size = 0;
          if (c->algorithm_mac == SSL_AEAD)
              mac_pkey_type = NULL;
      } else {
          if (!ssl_evp_md_up_ref(ctx->ssl_digest_methods[i])) {
              ssl_evp_cipher_free(*enc);
              return 0;
          }
          *md = ctx->ssl_digest_methods[i];
          if (mac_pkey_type != NULL)
              *mac_pkey_type = ssl_mac_pkey_id[i];
          if (mac_secret_size != NULL)
              *mac_secret_size = ctx->ssl_mac_secret_size[i];
      }
  
      if ((*enc != NULL) &&
          (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
          && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
          const EVP_CIPHER *evp = NULL;
  
          if (use_etm
                  || s->ssl_version >> 8 != TLS1_VERSION_MAJOR
                  || s->ssl_version < TLS1_VERSION)
              return 1;
  
          if (c->algorithm_enc == SSL_RC4
                  && c->algorithm_mac == SSL_MD5)
              evp = ssl_evp_cipher_fetch(ctx->libctx, NID_rc4_hmac_md5,
                                         ctx->propq);
          else if (c->algorithm_enc == SSL_AES128
                      && c->algorithm_mac == SSL_SHA1)
              evp = ssl_evp_cipher_fetch(ctx->libctx,
                                         NID_aes_128_cbc_hmac_sha1,
                                         ctx->propq);
          else if (c->algorithm_enc == SSL_AES256
                      && c->algorithm_mac == SSL_SHA1)
               evp = ssl_evp_cipher_fetch(ctx->libctx,
                                          NID_aes_256_cbc_hmac_sha1,
                                          ctx->propq);
          else if (c->algorithm_enc == SSL_AES128
                      && c->algorithm_mac == SSL_SHA256)
              evp = ssl_evp_cipher_fetch(ctx->libctx,
                                         NID_aes_128_cbc_hmac_sha256,
                                         ctx->propq);
          else if (c->algorithm_enc == SSL_AES256
                      && c->algorithm_mac == SSL_SHA256)
              evp = ssl_evp_cipher_fetch(ctx->libctx,
                                         NID_aes_256_cbc_hmac_sha256,
                                         ctx->propq);
  
          if (evp != NULL) {
              ssl_evp_cipher_free(*enc);
              ssl_evp_md_free(*md);
              *enc = evp;
              *md = NULL;
          }
          return 1;
      }
  
      return 0;
  }
  
  const EVP_MD *ssl_md(SSL_CTX *ctx, int idx)
  {
      idx &= SSL_HANDSHAKE_MAC_MASK;
      if (idx < 0 || idx >= SSL_MD_NUM_IDX)
          return NULL;
      return ctx->ssl_digest_methods[idx];
  }
  
  const EVP_MD *ssl_handshake_md(SSL *s)
  {
      return ssl_md(s->ctx, ssl_get_algorithm2(s));
  }
  
  const EVP_MD *ssl_prf_md(SSL *s)
  {
      return ssl_md(s->ctx, ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
  }
  
  #define ITEM_SEP(a) \
          (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
  
  static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
                             CIPHER_ORDER **tail)
  {
      if (curr == *tail)
          return;
      if (curr == *head)
          *head = curr->next;
      if (curr->prev != NULL)
          curr->prev->next = curr->next;
      if (curr->next != NULL)
          curr->next->prev = curr->prev;
      (*tail)->next = curr;
      curr->prev = *tail;
      curr->next = NULL;
      *tail = curr;
  }
  
  static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
                             CIPHER_ORDER **tail)
  {
      if (curr == *head)
          return;
      if (curr == *tail)
          *tail = curr->prev;
      if (curr->next != NULL)
          curr->next->prev = curr->prev;
      if (curr->prev != NULL)
          curr->prev->next = curr->next;
      (*head)->prev = curr;
      curr->next = *head;
      curr->prev = NULL;
      *head = curr;
  }
  
  static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
                                         int num_of_ciphers,
                                         uint32_t disabled_mkey,
                                         uint32_t disabled_auth,
                                         uint32_t disabled_enc,
                                         uint32_t disabled_mac,
                                         CIPHER_ORDER *co_list,
                                         CIPHER_ORDER **head_p,
                                         CIPHER_ORDER **tail_p)
  {
      int i, co_list_num;
      const SSL_CIPHER *c;
  
      /*
       * We have num_of_ciphers descriptions compiled in, depending on the
       * method selected (SSLv3, TLSv1 etc).
       * These will later be sorted in a linked list with at most num
       * entries.
       */
  
      /* Get the initial list of ciphers */
      co_list_num = 0;            /* actual count of ciphers */
      for (i = 0; i < num_of_ciphers; i++) {
          c = ssl_method->get_cipher(i);
          /* drop those that use any of that is not available */
          if (c == NULL || !c->valid)
              continue;
          if ((c->algorithm_mkey & disabled_mkey) ||
              (c->algorithm_auth & disabled_auth) ||
              (c->algorithm_enc & disabled_enc) ||
              (c->algorithm_mac & disabled_mac))
              continue;
          if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
              c->min_tls == 0)
              continue;
          if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
              c->min_dtls == 0)
              continue;
  
          co_list[co_list_num].cipher = c;
          co_list[co_list_num].next = NULL;
          co_list[co_list_num].prev = NULL;
          co_list[co_list_num].active = 0;
          co_list_num++;
      }
  
      /*
       * Prepare linked list from list entries
       */
      if (co_list_num > 0) {
          co_list[0].prev = NULL;
  
          if (co_list_num > 1) {
              co_list[0].next = &co_list[1];
  
              for (i = 1; i < co_list_num - 1; i++) {
                  co_list[i].prev = &co_list[i - 1];
                  co_list[i].next = &co_list[i + 1];
              }
  
              co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
          }
  
          co_list[co_list_num - 1].next = NULL;
  
          *head_p = &co_list[0];
          *tail_p = &co_list[co_list_num - 1];
      }
  }
  
  static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
                                         int num_of_group_aliases,
                                         uint32_t disabled_mkey,
                                         uint32_t disabled_auth,
                                         uint32_t disabled_enc,
                                         uint32_t disabled_mac,
                                         CIPHER_ORDER *head)
  {
      CIPHER_ORDER *ciph_curr;
      const SSL_CIPHER **ca_curr;
      int i;
      uint32_t mask_mkey = ~disabled_mkey;
      uint32_t mask_auth = ~disabled_auth;
      uint32_t mask_enc = ~disabled_enc;
      uint32_t mask_mac = ~disabled_mac;
  
      /*
       * First, add the real ciphers as already collected
       */
      ciph_curr = head;
      ca_curr = ca_list;
      while (ciph_curr != NULL) {
          *ca_curr = ciph_curr->cipher;
          ca_curr++;
          ciph_curr = ciph_curr->next;
      }
  
      /*
       * Now we add the available ones from the cipher_aliases[] table.
       * They represent either one or more algorithms, some of which
       * in any affected category must be supported (set in enabled_mask),
       * or represent a cipher strength value (will be added in any case because algorithms=0).
       */
      for (i = 0; i < num_of_group_aliases; i++) {
          uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
          uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
          uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
          uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
  
          if (algorithm_mkey)
              if ((algorithm_mkey & mask_mkey) == 0)
                  continue;
  
          if (algorithm_auth)
              if ((algorithm_auth & mask_auth) == 0)
                  continue;
  
          if (algorithm_enc)
              if ((algorithm_enc & mask_enc) == 0)
                  continue;
  
          if (algorithm_mac)
              if ((algorithm_mac & mask_mac) == 0)
                  continue;
  
          *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
          ca_curr++;
      }
  
      *ca_curr = NULL;            /* end of list */
  }
  
  static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
                                    uint32_t alg_auth, uint32_t alg_enc,
                                    uint32_t alg_mac, int min_tls,
                                    uint32_t algo_strength, int rule,
                                    int32_t strength_bits, CIPHER_ORDER **head_p,
                                    CIPHER_ORDER **tail_p)
  {
      CIPHER_ORDER *head, *tail, *curr, *next, *last;
      const SSL_CIPHER *cp;
      int reverse = 0;
  
      OSSL_TRACE_BEGIN(TLS_CIPHER){
          BIO_printf(trc_out,
                     "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
                     rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls,
                     algo_strength, strength_bits);
      }
  
      if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
          reverse = 1;            /* needed to maintain sorting between currently
                                   * deleted ciphers */
  
      head = *head_p;
      tail = *tail_p;
  
      if (reverse) {
          next = tail;
          last = head;
      } else {
          next = head;
          last = tail;
      }
  
      curr = NULL;
      for (;;) {
          if (curr == last)
              break;
  
          curr = next;
  
          if (curr == NULL)
              break;
  
          next = reverse ? curr->prev : curr->next;
  
          cp = curr->cipher;
  
          /*
           * Selection criteria is either the value of strength_bits
           * or the algorithms used.
           */
          if (strength_bits >= 0) {
              if (strength_bits != cp->strength_bits)
                  continue;
          } else {
              if (trc_out != NULL) {
                  BIO_printf(trc_out,
                             "\nName: %s:"
                             "\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
                             cp->name, cp->algorithm_mkey, cp->algorithm_auth,
                             cp->algorithm_enc, cp->algorithm_mac, cp->min_tls,
                             cp->algo_strength);
              }
              if (cipher_id != 0 && (cipher_id != cp->id))
                  continue;
              if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
                  continue;
              if (alg_auth && !(alg_auth & cp->algorithm_auth))
                  continue;
              if (alg_enc && !(alg_enc & cp->algorithm_enc))
                  continue;
              if (alg_mac && !(alg_mac & cp->algorithm_mac))
                  continue;
              if (min_tls && (min_tls != cp->min_tls))
                  continue;
              if ((algo_strength & SSL_STRONG_MASK)
                  && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
                  continue;
              if ((algo_strength & SSL_DEFAULT_MASK)
                  && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
                  continue;
          }
  
          if (trc_out != NULL)
              BIO_printf(trc_out, "Action = %d\n", rule);
  
          /* add the cipher if it has not been added yet. */
          if (rule == CIPHER_ADD) {
              /* reverse == 0 */
              if (!curr->active) {
                  ll_append_tail(&head, curr, &tail);
                  curr->active = 1;
              }
          }
          /* Move the added cipher to this location */
          else if (rule == CIPHER_ORD) {
              /* reverse == 0 */
              if (curr->active) {
                  ll_append_tail(&head, curr, &tail);
              }
          } else if (rule == CIPHER_DEL) {
              /* reverse == 1 */
              if (curr->active) {
                  /*
                   * most recently deleted ciphersuites get best positions for
                   * any future CIPHER_ADD (note that the CIPHER_DEL loop works
                   * in reverse to maintain the order)
                   */
                  ll_append_head(&head, curr, &tail);
                  curr->active = 0;
              }
          } else if (rule == CIPHER_BUMP) {
              if (curr->active)
                  ll_append_head(&head, curr, &tail);
          } else if (rule == CIPHER_KILL) {
              /* reverse == 0 */
              if (head == curr)
                  head = curr->next;
              else
                  curr->prev->next = curr->next;
              if (tail == curr)
                  tail = curr->prev;
              curr->active = 0;
              if (curr->next != NULL)
                  curr->next->prev = curr->prev;
              if (curr->prev != NULL)
                  curr->prev->next = curr->next;
              curr->next = NULL;
              curr->prev = NULL;
          }
      }
  
      *head_p = head;
      *tail_p = tail;
  
      OSSL_TRACE_END(TLS_CIPHER);
  }
  
  static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
                                      CIPHER_ORDER **tail_p)
  {
      int32_t max_strength_bits;
      int i, *number_uses;
      CIPHER_ORDER *curr;
  
      /*
       * This routine sorts the ciphers with descending strength. The sorting
       * must keep the pre-sorted sequence, so we apply the normal sorting
       * routine as '+' movement to the end of the list.
       */
      max_strength_bits = 0;
      curr = *head_p;
      while (curr != NULL) {
          if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
              max_strength_bits = curr->cipher->strength_bits;
          curr = curr->next;
      }
  
      number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
      if (number_uses == NULL) {
          ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
          return 0;
      }
  
      /*
       * Now find the strength_bits values actually used
       */
      curr = *head_p;
      while (curr != NULL) {
          if (curr->active)
              number_uses[curr->cipher->strength_bits]++;
          curr = curr->next;
      }
      /*
       * Go through the list of used strength_bits values in descending
       * order.
       */
      for (i = max_strength_bits; i >= 0; i--)
          if (number_uses[i] > 0)
              ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
                                    tail_p);
  
      OPENSSL_free(number_uses);
      return 1;
  }
  
  static int ssl_cipher_process_rulestr(const char *rule_str,
                                        CIPHER_ORDER **head_p,
                                        CIPHER_ORDER **tail_p,
                                        const SSL_CIPHER **ca_list, CERT *c)
  {
      uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
      int min_tls;
      const char *l, *buf;
      int j, multi, found, rule, retval, ok, buflen;
      uint32_t cipher_id = 0;
      char ch;
  
      retval = 1;
      l = rule_str;
      for ( ; ; ) {
          ch = *l;
  
          if (ch == '\0')
              break;              /* done */
          if (ch == '-') {
              rule = CIPHER_DEL;
              l++;
          } else if (ch == '+') {
              rule = CIPHER_ORD;
              l++;
          } else if (ch == '!') {
              rule = CIPHER_KILL;
              l++;
          } else if (ch == '@') {
              rule = CIPHER_SPECIAL;
              l++;
          } else {
              rule = CIPHER_ADD;
          }
  
          if (ITEM_SEP(ch)) {
              l++;
              continue;
          }
  
          alg_mkey = 0;
          alg_auth = 0;
          alg_enc = 0;
          alg_mac = 0;
          min_tls = 0;
          algo_strength = 0;
  
          for (;;) {
              ch = *l;
              buf = l;
              buflen = 0;
  #ifndef CHARSET_EBCDIC
              while (((ch >= 'A') && (ch <= 'Z')) ||
                     ((ch >= '0') && (ch <= '9')) ||
                     ((ch >= 'a') && (ch <= 'z')) ||
                     (ch == '-') || (ch == '.') || (ch == '='))
  #else
              while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '.')
                     || (ch == '='))
  #endif
              {
                  ch = *(++l);
                  buflen++;
              }
  
              if (buflen == 0) {
                  /*
                   * We hit something we cannot deal with,
                   * it is no command or separator nor
                   * alphanumeric, so we call this an error.
                   */
                  ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
                  retval = found = 0;
                  l++;
                  break;
              }
  
              if (rule == CIPHER_SPECIAL) {
                  found = 0;      /* unused -- avoid compiler warning */
                  break;          /* special treatment */
              }
  
              /* check for multi-part specification */
              if (ch == '+') {
                  multi = 1;
                  l++;
              } else {
                  multi = 0;
              }
  
              /*
               * Now search for the cipher alias in the ca_list. Be careful
               * with the strncmp, because the "buflen" limitation
               * will make the rule "ADH:SOME" and the cipher
               * "ADH-MY-CIPHER" look like a match for buflen=3.
               * So additionally check whether the cipher name found
               * has the correct length. We can save a strlen() call:
               * just checking for the '\0' at the right place is
               * sufficient, we have to strncmp() anyway. (We cannot
               * use strcmp(), because buf is not '\0' terminated.)
               */
              j = found = 0;
              cipher_id = 0;
              while (ca_list[j]) {
                  if (strncmp(buf, ca_list[j]->name, buflen) == 0
                      && (ca_list[j]->name[buflen] == '\0')) {
                      found = 1;
                      break;
                  } else
                      j++;
              }
  
              if (!found)
                  break;          /* ignore this entry */
  
              if (ca_list[j]->algorithm_mkey) {
                  if (alg_mkey) {
                      alg_mkey &= ca_list[j]->algorithm_mkey;
                      if (!alg_mkey) {
                          found = 0;
                          break;
                      }
                  } else {
                      alg_mkey = ca_list[j]->algorithm_mkey;
                  }
              }
  
              if (ca_list[j]->algorithm_auth) {
                  if (alg_auth) {
                      alg_auth &= ca_list[j]->algorithm_auth;
                      if (!alg_auth) {
                          found = 0;
                          break;
                      }
                  } else {
                      alg_auth = ca_list[j]->algorithm_auth;
                  }
              }
  
              if (ca_list[j]->algorithm_enc) {
                  if (alg_enc) {
                      alg_enc &= ca_list[j]->algorithm_enc;
                      if (!alg_enc) {
                          found = 0;
                          break;
                      }
                  } else {
                      alg_enc = ca_list[j]->algorithm_enc;
                  }
              }
  
              if (ca_list[j]->algorithm_mac) {
                  if (alg_mac) {
                      alg_mac &= ca_list[j]->algorithm_mac;
                      if (!alg_mac) {
                          found = 0;
                          break;
                      }
                  } else {
                      alg_mac = ca_list[j]->algorithm_mac;
                  }
              }
  
              if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
                  if (algo_strength & SSL_STRONG_MASK) {
                      algo_strength &=
                          (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
                          ~SSL_STRONG_MASK;
                      if (!(algo_strength & SSL_STRONG_MASK)) {
                          found = 0;
                          break;
                      }
                  } else {
                      algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
                  }
              }
  
              if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
                  if (algo_strength & SSL_DEFAULT_MASK) {
                      algo_strength &=
                          (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
                          ~SSL_DEFAULT_MASK;
                      if (!(algo_strength & SSL_DEFAULT_MASK)) {
                          found = 0;
                          break;
                      }
                  } else {
                      algo_strength |=
                          ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
                  }
              }
  
              if (ca_list[j]->valid) {
                  /*
                   * explicit ciphersuite found; its protocol version does not
                   * become part of the search pattern!
                   */
  
                  cipher_id = ca_list[j]->id;
              } else {
                  /*
                   * not an explicit ciphersuite; only in this case, the
                   * protocol version is considered part of the search pattern
                   */
  
                  if (ca_list[j]->min_tls) {
                      if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
                          found = 0;
                          break;
                      } else {
                          min_tls = ca_list[j]->min_tls;
                      }
                  }
              }
  
              if (!multi)
                  break;
          }
  
          /*
           * Ok, we have the rule, now apply it
           */
          if (rule == CIPHER_SPECIAL) { /* special command */
              ok = 0;
              if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0) {
                  ok = ssl_cipher_strength_sort(head_p, tail_p);
              } else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
                  int level = buf[9] - '0';
                  if (level < 0 || level > 5) {
                      ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
                  } else {
                      c->sec_level = level;
                      ok = 1;
                  }
              } else {
                  ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
              }
              if (ok == 0)
                  retval = 0;
              /*
               * We do not support any "multi" options
               * together with "@", so throw away the
               * rest of the command, if any left, until
               * end or ':' is found.
               */
              while ((*l != '\0') && !ITEM_SEP(*l))
                  l++;
          } else if (found) {
              ssl_cipher_apply_rule(cipher_id,
                                    alg_mkey, alg_auth, alg_enc, alg_mac,
                                    min_tls, algo_strength, rule, -1, head_p,
                                    tail_p);
          } else {
              while ((*l != '\0') && !ITEM_SEP(*l))
                  l++;
          }
          if (*l == '\0')
              break;              /* done */
      }
  
      return retval;
  }
  
  #ifndef OPENSSL_NO_EC
  static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
                                      const char **prule_str)
  {
      unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
      if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
          suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
      } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
          suiteb_comb2 = 1;
          suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
      } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
          suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
      } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
          suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
      }
  
      if (suiteb_flags) {
          c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
          c->cert_flags |= suiteb_flags;
      } else {
          suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
      }
  
      if (!suiteb_flags)
          return 1;
      /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
  
      if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
          ERR_raise(ERR_LIB_SSL, SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
          return 0;
      }
  # ifndef OPENSSL_NO_EC
      switch (suiteb_flags) {
      case SSL_CERT_FLAG_SUITEB_128_LOS:
          if (suiteb_comb2)
              *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
          else
              *prule_str =
                  "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
          break;
      case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
          *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
          break;
      case SSL_CERT_FLAG_SUITEB_192_LOS:
          *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
          break;
      }
      return 1;
  # else
      ERR_raise(ERR_LIB_SSL, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
      return 0;
  # endif
  }
  #endif
  
  static int ciphersuite_cb(const char *elem, int len, void *arg)
  {
      STACK_OF(SSL_CIPHER) *ciphersuites = (STACK_OF(SSL_CIPHER) *)arg;
      const SSL_CIPHER *cipher;
      /* Arbitrary sized temp buffer for the cipher name. Should be big enough */
      char name[80];
  
      if (len > (int)(sizeof(name) - 1))
          /* Anyway return 1 so we can parse rest of the list */
          return 1;
  
      memcpy(name, elem, len);
      name[len] = '\0';
  
      cipher = ssl3_get_cipher_by_std_name(name);
      if (cipher == NULL)
          /* Ciphersuite not found but return 1 to parse rest of the list */
          return 1;
  
      if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) {
          ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
          return 0;
      }
  
      return 1;
  }
  
  static __owur int set_ciphersuites(STACK_OF(SSL_CIPHER) **currciphers, const char *str)
  {
      STACK_OF(SSL_CIPHER) *newciphers = sk_SSL_CIPHER_new_null();
  
      if (newciphers == NULL)
          return 0;
  
      /* Parse the list. We explicitly allow an empty list */
      if (*str != '\0'
              && (CONF_parse_list(str, ':', 1, ciphersuite_cb, newciphers) <= 0
                  || sk_SSL_CIPHER_num(newciphers) == 0)) {
          ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH);
          sk_SSL_CIPHER_free(newciphers);
          return 0;
      }
      sk_SSL_CIPHER_free(*currciphers);
      *currciphers = newciphers;
  
      return 1;
  }
  
  static int update_cipher_list_by_id(STACK_OF(SSL_CIPHER) **cipher_list_by_id,
                                      STACK_OF(SSL_CIPHER) *cipherstack)
  {
      STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
  
      if (tmp_cipher_list == NULL) {
          return 0;
      }
  
      sk_SSL_CIPHER_free(*cipher_list_by_id);
      *cipher_list_by_id = tmp_cipher_list;
  
      (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
      sk_SSL_CIPHER_sort(*cipher_list_by_id);
  
      return 1;
  }
  
  static int update_cipher_list(STACK_OF(SSL_CIPHER) **cipher_list,
                                STACK_OF(SSL_CIPHER) **cipher_list_by_id,
                                STACK_OF(SSL_CIPHER) *tls13_ciphersuites)
  {
      int i;
      STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(*cipher_list);
  
      if (tmp_cipher_list == NULL)
          return 0;
  
      /*
       * Delete any existing TLSv1.3 ciphersuites. These are always first in the
       * list.
       */
      while (sk_SSL_CIPHER_num(tmp_cipher_list) > 0
             && sk_SSL_CIPHER_value(tmp_cipher_list, 0)->min_tls
                == TLS1_3_VERSION)
          (void)sk_SSL_CIPHER_delete(tmp_cipher_list, 0);
  
      /* Insert the new TLSv1.3 ciphersuites */
      for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++)
          sk_SSL_CIPHER_insert(tmp_cipher_list,
                               sk_SSL_CIPHER_value(tls13_ciphersuites, i), i);
  
      if (!update_cipher_list_by_id(cipher_list_by_id, tmp_cipher_list))
          return 0;
  
      sk_SSL_CIPHER_free(*cipher_list);
      *cipher_list = tmp_cipher_list;
  
      return 1;
  }
  
  int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str)
  {
      int ret = set_ciphersuites(&(ctx->tls13_ciphersuites), str);
  
      if (ret && ctx->cipher_list != NULL)
          return update_cipher_list(&ctx->cipher_list, &ctx->cipher_list_by_id,
                                    ctx->tls13_ciphersuites);
  
      return ret;
  }
  
  int SSL_set_ciphersuites(SSL *s, const char *str)
  {
      STACK_OF(SSL_CIPHER) *cipher_list;
      int ret = set_ciphersuites(&(s->tls13_ciphersuites), str);
  
      if (s->cipher_list == NULL) {
          if ((cipher_list = SSL_get_ciphers(s)) != NULL)
              s->cipher_list = sk_SSL_CIPHER_dup(cipher_list);
      }
      if (ret && s->cipher_list != NULL)
          return update_cipher_list(&s->cipher_list, &s->cipher_list_by_id,
                                    s->tls13_ciphersuites);
  
      return ret;
  }
  
  STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(SSL_CTX *ctx,
                                               STACK_OF(SSL_CIPHER) *tls13_ciphersuites,
                                               STACK_OF(SSL_CIPHER) **cipher_list,
                                               STACK_OF(SSL_CIPHER) **cipher_list_by_id,
                                               const char *rule_str,
                                               CERT *c)
  {
      int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i;
      uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
      STACK_OF(SSL_CIPHER) *cipherstack;
      const char *rule_p;
      CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
      const SSL_CIPHER **ca_list = NULL;
      const SSL_METHOD *ssl_method = ctx->method;
  
      /*
       * Return with error if nothing to do.
       */
      if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
          return NULL;
  #ifndef OPENSSL_NO_EC
      if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
          return NULL;
  #endif
  
      /*
       * To reduce the work to do we only want to process the compiled
       * in algorithms, so we first get the mask of disabled ciphers.
       */
  
      disabled_mkey = ctx->disabled_mkey_mask;
      disabled_auth = ctx->disabled_auth_mask;
      disabled_enc = ctx->disabled_enc_mask;
      disabled_mac = ctx->disabled_mac_mask;
  
      /*
       * Now we have to collect the available ciphers from the compiled
       * in ciphers. We cannot get more than the number compiled in, so
       * it is used for allocation.
       */
      num_of_ciphers = ssl_method->num_ciphers();
  
      co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
      if (co_list == NULL) {
          ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
          return NULL;          /* Failure */
      }
  
      ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
                                 disabled_mkey, disabled_auth, disabled_enc,
                                 disabled_mac, co_list, &head, &tail);
  
      /* Now arrange all ciphers by preference. */
  
      /*
       * Everything else being equal, prefer ephemeral ECDH over other key
       * exchange mechanisms.
       * For consistency, prefer ECDSA over RSA (though this only matters if the
       * server has both certificates, and is using the DEFAULT, or a client
       * preference).
       */
      ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
                            -1, &head, &tail);
      ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
                            &tail);
      ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
                            &tail);
  
      /* Within each strength group, we prefer GCM over CHACHA... */
      ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
                            &head, &tail);
      ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
                            &head, &tail);
  
      /*
       * ...and generally, our preferred cipher is AES.
       * Note that AEADs will be bumped to take preference after sorting by
       * strength.
       */
      ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
                            -1, &head, &tail);
  
      /* Temporarily enable everything else for sorting */
      ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
  
      /* Low priority for MD5 */
      ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
                            &tail);
  
      /*
       * Move anonymous ciphers to the end.  Usually, these will remain
       * disabled. (For applications that allow them, they aren't too bad, but
       * we prefer authenticated ciphers.)
       */
      ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
                            &tail);
  
      ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
                            &tail);
      ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
                            &tail);
  
      /* RC4 is sort-of broken -- move to the end */
      ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
                            &tail);
  
      /*
       * Now sort by symmetric encryption strength.  The above ordering remains
       * in force within each class
       */
      if (!ssl_cipher_strength_sort(&head, &tail)) {
          OPENSSL_free(co_list);
          return NULL;
      }
  
      /*
       * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs.
       * TODO(openssl-team): is there an easier way to accomplish all this?
       */
      ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1,
                            &head, &tail);
  
      /*
       * Irrespective of strength, enforce the following order:
       * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest.
       * Within each group, ciphers remain sorted by strength and previous
       * preference, i.e.,
       * 1) ECDHE > DHE
       * 2) GCM > CHACHA
       * 3) AES > rest
       * 4) TLS 1.2 > legacy
       *
       * Because we now bump ciphers to the top of the list, we proceed in
       * reverse order of preference.
       */
      ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1,
                            &head, &tail);
      ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0,
                            CIPHER_BUMP, -1, &head, &tail);
      ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0,
                            CIPHER_BUMP, -1, &head, &tail);
  
      /* Now disable everything (maintaining the ordering!) */
      ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
  
      /*
       * We also need cipher aliases for selecting based on the rule_str.
       * There might be two types of entries in the rule_str: 1) names
       * of ciphers themselves 2) aliases for groups of ciphers.
       * For 1) we need the available ciphers and for 2) the cipher
       * groups of cipher_aliases added together in one list (otherwise
       * we would be happy with just the cipher_aliases table).
       */
      num_of_group_aliases = OSSL_NELEM(cipher_aliases);
      num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
      ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
      if (ca_list == NULL) {
          OPENSSL_free(co_list);
          ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
          return NULL;          /* Failure */
      }
      ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
                                 disabled_mkey, disabled_auth, disabled_enc,
                                 disabled_mac, head);
  
      /*
       * If the rule_string begins with DEFAULT, apply the default rule
       * before using the (possibly available) additional rules.
       */
      ok = 1;
      rule_p = rule_str;
      if (strncmp(rule_str, "DEFAULT", 7) == 0) {
          ok = ssl_cipher_process_rulestr(OSSL_default_cipher_list(),
                                          &head, &tail, ca_list, c);
          rule_p += 7;
          if (*rule_p == ':')
              rule_p++;
      }
  
      if (ok && (rule_p[0] != '\0'))
          ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
  
      OPENSSL_free(ca_list);      /* Not needed anymore */
  
      if (!ok) {                  /* Rule processing failure */
          OPENSSL_free(co_list);
          return NULL;
      }
  
      /*
       * Allocate new "cipherstack" for the result, return with error
       * if we cannot get one.
       */
      if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
          OPENSSL_free(co_list);
          return NULL;
      }
  
      /* Add TLSv1.3 ciphers first - we always prefer those if possible */
      for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) {
          const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
  
          /* Don't include any TLSv1.3 ciphers that are disabled */
          if ((sslc->algorithm_enc & disabled_enc) != 0
                  || (ssl_cipher_table_mac[sslc->algorithm2
                                           & SSL_HANDSHAKE_MAC_MASK].mask
                      & ctx->disabled_mac_mask) != 0)
              continue;
  
          if (!sk_SSL_CIPHER_push(cipherstack, sslc)) {
              sk_SSL_CIPHER_free(cipherstack);
              return NULL;
          }
      }
  
      OSSL_TRACE_BEGIN(TLS_CIPHER) {
          BIO_printf(trc_out, "cipher selection:\n");
      }
      /*
       * The cipher selection for the list is done. The ciphers are added
       * to the resulting precedence to the STACK_OF(SSL_CIPHER).
       */
      for (curr = head; curr != NULL; curr = curr->next) {
          if (curr->active) {
              if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
                  OPENSSL_free(co_list);
                  sk_SSL_CIPHER_free(cipherstack);
                  OSSL_TRACE_CANCEL(TLS_CIPHER);
                  return NULL;
              }
              if (trc_out != NULL)
                  BIO_printf(trc_out, "<%s>\n", curr->cipher->name);
          }
      }
      OPENSSL_free(co_list);      /* Not needed any longer */
      OSSL_TRACE_END(TLS_CIPHER);
  
      if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) {
          sk_SSL_CIPHER_free(cipherstack);
          return NULL;
      }
      sk_SSL_CIPHER_free(*cipher_list);
      *cipher_list = cipherstack;
  
      return cipherstack;
  }
  
  char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
  {
      const char *ver;
      const char *kx, *au, *enc, *mac;
      uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
      static const char *format = "%-30s %-7s Kx=%-8s Au=%-5s Enc=%-9s Mac=%-4s\n";
  
      if (buf == NULL) {
          len = 128;
          if ((buf = OPENSSL_malloc(len)) == NULL) {
              ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
              return NULL;
          }
      } else if (len < 128) {
          return NULL;
      }
  
      alg_mkey = cipher->algorithm_mkey;
      alg_auth = cipher->algorithm_auth;
      alg_enc = cipher->algorithm_enc;
      alg_mac = cipher->algorithm_mac;
  
      ver = ssl_protocol_to_string(cipher->min_tls);
  
      switch (alg_mkey) {
      case SSL_kRSA:
          kx = "RSA";
          break;
      case SSL_kDHE:
          kx = "DH";
          break;
      case SSL_kECDHE:
          kx = "ECDH";
          break;
      case SSL_kPSK:
          kx = "PSK";
          break;
      case SSL_kRSAPSK:
          kx = "RSAPSK";
          break;
      case SSL_kECDHEPSK:
          kx = "ECDHEPSK";
          break;
      case SSL_kDHEPSK:
          kx = "DHEPSK";
          break;
      case SSL_kSRP:
          kx = "SRP";
          break;
      case SSL_kGOST:
          kx = "GOST";
          break;
      case SSL_kGOST18:
          kx = "GOST18";
          break;
      case SSL_kANY:
          kx = "any";
          break;
      default:
          kx = "unknown";
      }
  
      switch (alg_auth) {
      case SSL_aRSA:
          au = "RSA";
          break;
      case SSL_aDSS:
          au = "DSS";
          break;
      case SSL_aNULL:
          au = "None";
          break;
      case SSL_aECDSA:
          au = "ECDSA";
          break;
      case SSL_aPSK:
          au = "PSK";
          break;
      case SSL_aSRP:
          au = "SRP";
          break;
      case SSL_aGOST01:
          au = "GOST01";
          break;
      /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
      case (SSL_aGOST12 | SSL_aGOST01):
          au = "GOST12";
          break;
      case SSL_aANY:
          au = "any";
          break;
      default:
          au = "unknown";
          break;
      }
  
      switch (alg_enc) {
      case SSL_DES:
          enc = "DES(56)";
          break;
      case SSL_3DES:
          enc = "3DES(168)";
          break;
      case SSL_RC4:
          enc = "RC4(128)";
          break;
      case SSL_RC2:
          enc = "RC2(128)";
          break;
      case SSL_IDEA:
          enc = "IDEA(128)";
          break;
      case SSL_eNULL:
          enc = "None";
          break;
      case SSL_AES128:
          enc = "AES(128)";
          break;
      case SSL_AES256:
          enc = "AES(256)";
          break;
      case SSL_AES128GCM:
          enc = "AESGCM(128)";
          break;
      case SSL_AES256GCM:
          enc = "AESGCM(256)";
          break;
      case SSL_AES128CCM:
          enc = "AESCCM(128)";
          break;
      case SSL_AES256CCM:
          enc = "AESCCM(256)";
          break;
      case SSL_AES128CCM8:
          enc = "AESCCM8(128)";
          break;
      case SSL_AES256CCM8:
          enc = "AESCCM8(256)";
          break;
      case SSL_CAMELLIA128:
          enc = "Camellia(128)";
          break;
      case SSL_CAMELLIA256:
          enc = "Camellia(256)";
          break;
      case SSL_ARIA128GCM:
          enc = "ARIAGCM(128)";
          break;
      case SSL_ARIA256GCM:
          enc = "ARIAGCM(256)";
          break;
      case SSL_SEED:
          enc = "SEED(128)";
          break;
      case SSL_eGOST2814789CNT:
      case SSL_eGOST2814789CNT12:
          enc = "GOST89(256)";
          break;
      case SSL_MAGMA:
          enc = "MAGMA";
          break;
      case SSL_KUZNYECHIK:
          enc = "KUZNYECHIK";
          break;
      case SSL_CHACHA20POLY1305:
          enc = "CHACHA20/POLY1305(256)";
          break;
      default:
          enc = "unknown";
          break;
      }
  
      switch (alg_mac) {
      case SSL_MD5:
          mac = "MD5";
          break;
      case SSL_SHA1:
          mac = "SHA1";
          break;
      case SSL_SHA256:
          mac = "SHA256";
          break;
      case SSL_SHA384:
          mac = "SHA384";
          break;
      case SSL_AEAD:
          mac = "AEAD";
          break;
      case SSL_GOST89MAC:
      case SSL_GOST89MAC12:
          mac = "GOST89";
          break;
      case SSL_GOST94:
          mac = "GOST94";
          break;
      case SSL_GOST12_256:
      case SSL_GOST12_512:
          mac = "GOST2012";
          break;
      default:
          mac = "unknown";
          break;
      }
  
      BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
  
      return buf;
  }
  
  const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
  {
      if (c == NULL)
          return "(NONE)";
  
      /*
       * Backwards-compatibility crutch.  In almost all contexts we report TLS
       * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
       */
      if (c->min_tls == TLS1_VERSION)
          return "TLSv1.0";
      return ssl_protocol_to_string(c->min_tls);
  }
  
  /* return the actual cipher being used */
  const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
  {
      if (c != NULL)
          return c->name;
      return "(NONE)";
  }
  
  /* return the actual cipher being used in RFC standard name */
  const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c)
  {
      if (c != NULL)
          return c->stdname;
      return "(NONE)";
  }
  
  /* return the OpenSSL name based on given RFC standard name */
  const char *OPENSSL_cipher_name(const char *stdname)
  {
      const SSL_CIPHER *c;
  
      if (stdname == NULL)
          return "(NONE)";
      c = ssl3_get_cipher_by_std_name(stdname);
      return SSL_CIPHER_get_name(c);
  }
  
  /* number of bits for symmetric cipher */
  int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
  {
      int ret = 0;
  
      if (c != NULL) {
          if (alg_bits != NULL)
              *alg_bits = (int)c->alg_bits;
          ret = (int)c->strength_bits;
      }
      return ret;
  }
  
  uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
  {
      return c->id;
  }
  
  uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c)
  {
      return c->id & 0xFFFF;
  }
  
  SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
  {
      SSL_COMP *ctmp;
      int i, nn;
  
      if ((n == 0) || (sk == NULL))
          return NULL;
      nn = sk_SSL_COMP_num(sk);
      for (i = 0; i < nn; i++) {
          ctmp = sk_SSL_COMP_value(sk, i);
          if (ctmp->id == n)
              return ctmp;
      }
      return NULL;
  }
  
  #ifdef OPENSSL_NO_COMP
  STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
  {
      return NULL;
  }
  
  STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
                                                        *meths)
  {
      return meths;
  }
  
  int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
  {
      return 1;
  }
  
  #else
  STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
  {
      load_builtin_compressions();
      return ssl_comp_methods;
  }
  
  STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
                                                        *meths)
  {
      STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
      ssl_comp_methods = meths;
      return old_meths;
  }
  
  static void cmeth_free(SSL_COMP *cm)
  {
      OPENSSL_free(cm);
  }
  
  void ssl_comp_free_compression_methods_int(void)
  {
      STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
      ssl_comp_methods = NULL;
      sk_SSL_COMP_pop_free(old_meths, cmeth_free);
  }
  
  int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
  {
      SSL_COMP *comp;
  
      if (cm == NULL || COMP_get_type(cm) == NID_undef)
          return 1;
  
      /*-
       * According to draft-ietf-tls-compression-04.txt, the
       * compression number ranges should be the following:
       *
       *   0 to  63:  methods defined by the IETF
       *  64 to 192:  external party methods assigned by IANA
       * 193 to 255:  reserved for private use
       */
      if (id < 193 || id > 255) {
          ERR_raise(ERR_LIB_SSL, SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
          return 1;
      }
  
      comp = OPENSSL_malloc(sizeof(*comp));
      if (comp == NULL) {
          ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
          return 1;
      }
  
      comp->id = id;
      comp->method = cm;
      load_builtin_compressions();
      if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
          OPENSSL_free(comp);
          ERR_raise(ERR_LIB_SSL, SSL_R_DUPLICATE_COMPRESSION_ID);
          return 1;
      }
      if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
          OPENSSL_free(comp);
          ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
          return 1;
      }
      return 0;
  }
  #endif
  
  const char *SSL_COMP_get_name(const COMP_METHOD *comp)
  {
  #ifndef OPENSSL_NO_COMP
      return comp ? COMP_get_name(comp) : NULL;
  #else
      return NULL;
  #endif
  }
  
  const char *SSL_COMP_get0_name(const SSL_COMP *comp)
  {
  #ifndef OPENSSL_NO_COMP
      return comp->name;
  #else
      return NULL;
  #endif
  }
  
  int SSL_COMP_get_id(const SSL_COMP *comp)
  {
  #ifndef OPENSSL_NO_COMP
      return comp->id;
  #else
      return -1;
  #endif
  }
  
  const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr,
                                           int all)
  {
      const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr);
  
      if (c == NULL || (!all && c->valid == 0))
          return NULL;
      return c;
  }
  
  const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
  {
      return ssl->method->get_cipher_by_char(ptr);
  }
  
  int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
  {
      int i;
      if (c == NULL)
          return NID_undef;
      i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
      if (i == -1)
          return NID_undef;
      return ssl_cipher_table_cipher[i].nid;
  }
  
  int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
  {
      int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
  
      if (i == -1)
          return NID_undef;
      return ssl_cipher_table_mac[i].nid;
  }
  
  int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
  {
      int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
  
      if (i == -1)
          return NID_undef;
      return ssl_cipher_table_kx[i].nid;
  }
  
  int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
  {
      int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
  
      if (i == -1)
          return NID_undef;
      return ssl_cipher_table_auth[i].nid;
  }
  
  const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c)
  {
      int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK;
  
      if (idx < 0 || idx >= SSL_MD_NUM_IDX)
          return NULL;
      return EVP_get_digestbynid(ssl_cipher_table_mac[idx].nid);
  }
  
  int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
  {
      return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;
  }
  
  int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead,
                              size_t *int_overhead, size_t *blocksize,
                              size_t *ext_overhead)
  {
      size_t mac = 0, in = 0, blk = 0, out = 0;
  
      /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead
       * because there are no handy #defines for those. */
      if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) {
          out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
      } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) {
          out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16;
      } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) {
          out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8;
      } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) {
          out = 16;
      } else if (c->algorithm_mac & SSL_AEAD) {
          /* We're supposed to have handled all the AEAD modes above */
          return 0;
      } else {
          /* Non-AEAD modes. Calculate MAC/cipher overhead separately */
          int digest_nid = SSL_CIPHER_get_digest_nid(c);
          const EVP_MD *e_md = EVP_get_digestbynid(digest_nid);
  
          if (e_md == NULL)
              return 0;
  
          mac = EVP_MD_size(e_md);
          if (c->algorithm_enc != SSL_eNULL) {
              int cipher_nid = SSL_CIPHER_get_cipher_nid(c);
              const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid);
  
              /* If it wasn't AEAD or SSL_eNULL, we expect it to be a
                 known CBC cipher. */
              if (e_ciph == NULL ||
                  EVP_CIPHER_mode(e_ciph) != EVP_CIPH_CBC_MODE)
                  return 0;
  
              in = 1; /* padding length byte */
              out = EVP_CIPHER_iv_length(e_ciph);
              blk = EVP_CIPHER_block_size(e_ciph);
          }
      }
  
      *mac_overhead = mac;
      *int_overhead = in;
      *blocksize = blk;
      *ext_overhead = out;
  
      return 1;
  }
  
  int ssl_cert_is_disabled(SSL_CTX *ctx, size_t idx)
  {
      const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx);
  
      if (cl == NULL || (cl->amask & ctx->disabled_auth_mask) != 0)
          return 1;
      return 0;
  }
  
  /*
   * Default list of TLSv1.2 (and earlier) ciphers
   * SSL_DEFAULT_CIPHER_LIST deprecated in 3.0.0
   * Update both macro and function simultaneously
   */
  const char *OSSL_default_cipher_list(void)
  {
      return "ALL:!COMPLEMENTOFDEFAULT:!eNULL";
  }
  
  /*
   * Default list of TLSv1.3 (and later) ciphers
   * TLS_DEFAULT_CIPHERSUITES deprecated in 3.0.0
   * Update both macro and function simultaneously
   */
  const char *OSSL_default_ciphersuites(void)
  {
      return "TLS_AES_256_GCM_SHA384:"
  #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
             "TLS_CHACHA20_POLY1305_SHA256:"
  #endif
             "TLS_AES_128_GCM_SHA256";
  }
  