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 /*
  * Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved.
  * Copyright (c) 2002, Oracle and/or its affiliates. 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
  */
 
 #ifndef OPENSSL_SSL3_H
 #define OPENSSL_SSL3_H
 #pragma once
 
 #include <openssl/macros.h>
 #ifndef OPENSSL_NO_DEPRECATED_3_0
 #define HEADER_SSL3_H
 #endif
 
 #include <openssl/comp.h>
 #include <openssl/buffer.h>
 #include <openssl/evp.h>
 #include <openssl/ssl.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /*
  * Signalling cipher suite value from RFC 5746
  * (TLS_EMPTY_RENEGOTIATION_INFO_SCSV)
  */
 #define SSL3_CK_SCSV 0x030000FF
 
 /*
  * Signalling cipher suite value from draft-ietf-tls-downgrade-scsv-00
  * (TLS_FALLBACK_SCSV)
  */
 #define SSL3_CK_FALLBACK_SCSV 0x03005600
 
 #define SSL3_CK_RSA_NULL_MD5 0x03000001
 #define SSL3_CK_RSA_NULL_SHA 0x03000002
 #define SSL3_CK_RSA_RC4_40_MD5 0x03000003
 #define SSL3_CK_RSA_RC4_128_MD5 0x03000004
 #define SSL3_CK_RSA_RC4_128_SHA 0x03000005
 #define SSL3_CK_RSA_RC2_40_MD5 0x03000006
 #define SSL3_CK_RSA_IDEA_128_SHA 0x03000007
 #define SSL3_CK_RSA_DES_40_CBC_SHA 0x03000008
 #define SSL3_CK_RSA_DES_64_CBC_SHA 0x03000009
 #define SSL3_CK_RSA_DES_192_CBC3_SHA 0x0300000A
 
 #define SSL3_CK_DH_DSS_DES_40_CBC_SHA 0x0300000B
 #define SSL3_CK_DH_DSS_DES_64_CBC_SHA 0x0300000C
 #define SSL3_CK_DH_DSS_DES_192_CBC3_SHA 0x0300000D
 #define SSL3_CK_DH_RSA_DES_40_CBC_SHA 0x0300000E
 #define SSL3_CK_DH_RSA_DES_64_CBC_SHA 0x0300000F
 #define SSL3_CK_DH_RSA_DES_192_CBC3_SHA 0x03000010
 
 #define SSL3_CK_DHE_DSS_DES_40_CBC_SHA 0x03000011
 #define SSL3_CK_EDH_DSS_DES_40_CBC_SHA SSL3_CK_DHE_DSS_DES_40_CBC_SHA
 #define SSL3_CK_DHE_DSS_DES_64_CBC_SHA 0x03000012
 #define SSL3_CK_EDH_DSS_DES_64_CBC_SHA SSL3_CK_DHE_DSS_DES_64_CBC_SHA
 #define SSL3_CK_DHE_DSS_DES_192_CBC3_SHA 0x03000013
 #define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA SSL3_CK_DHE_DSS_DES_192_CBC3_SHA
 #define SSL3_CK_DHE_RSA_DES_40_CBC_SHA 0x03000014
 #define SSL3_CK_EDH_RSA_DES_40_CBC_SHA SSL3_CK_DHE_RSA_DES_40_CBC_SHA
 #define SSL3_CK_DHE_RSA_DES_64_CBC_SHA 0x03000015
 #define SSL3_CK_EDH_RSA_DES_64_CBC_SHA SSL3_CK_DHE_RSA_DES_64_CBC_SHA
 #define SSL3_CK_DHE_RSA_DES_192_CBC3_SHA 0x03000016
 #define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA SSL3_CK_DHE_RSA_DES_192_CBC3_SHA
 
 #define SSL3_CK_ADH_RC4_40_MD5 0x03000017
 #define SSL3_CK_ADH_RC4_128_MD5 0x03000018
 #define SSL3_CK_ADH_DES_40_CBC_SHA 0x03000019
 #define SSL3_CK_ADH_DES_64_CBC_SHA 0x0300001A
 #define SSL3_CK_ADH_DES_192_CBC_SHA 0x0300001B
 
 /* a bundle of RFC standard cipher names, generated from ssl3_ciphers[] */
 #define SSL3_RFC_RSA_NULL_MD5 "TLS_RSA_WITH_NULL_MD5"
 #define SSL3_RFC_RSA_NULL_SHA "TLS_RSA_WITH_NULL_SHA"
 #define SSL3_RFC_RSA_DES_192_CBC3_SHA "TLS_RSA_WITH_3DES_EDE_CBC_SHA"
 #define SSL3_RFC_DHE_DSS_DES_192_CBC3_SHA "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA"
 #define SSL3_RFC_DHE_RSA_DES_192_CBC3_SHA "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA"
 #define SSL3_RFC_ADH_DES_192_CBC_SHA "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA"
 #define SSL3_RFC_RSA_IDEA_128_SHA "TLS_RSA_WITH_IDEA_CBC_SHA"
 #define SSL3_RFC_RSA_RC4_128_MD5 "TLS_RSA_WITH_RC4_128_MD5"
 #define SSL3_RFC_RSA_RC4_128_SHA "TLS_RSA_WITH_RC4_128_SHA"
 #define SSL3_RFC_ADH_RC4_128_MD5 "TLS_DH_anon_WITH_RC4_128_MD5"
 
 #define SSL3_TXT_RSA_NULL_MD5 "NULL-MD5"
 #define SSL3_TXT_RSA_NULL_SHA "NULL-SHA"
 #define SSL3_TXT_RSA_RC4_40_MD5 "EXP-RC4-MD5"
 #define SSL3_TXT_RSA_RC4_128_MD5 "RC4-MD5"
 #define SSL3_TXT_RSA_RC4_128_SHA "RC4-SHA"
 #define SSL3_TXT_RSA_RC2_40_MD5 "EXP-RC2-CBC-MD5"
 #define SSL3_TXT_RSA_IDEA_128_SHA "IDEA-CBC-SHA"
 #define SSL3_TXT_RSA_DES_40_CBC_SHA "EXP-DES-CBC-SHA"
 #define SSL3_TXT_RSA_DES_64_CBC_SHA "DES-CBC-SHA"
 #define SSL3_TXT_RSA_DES_192_CBC3_SHA "DES-CBC3-SHA"
 
 #define SSL3_TXT_DH_DSS_DES_40_CBC_SHA "EXP-DH-DSS-DES-CBC-SHA"
 #define SSL3_TXT_DH_DSS_DES_64_CBC_SHA "DH-DSS-DES-CBC-SHA"
 #define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA "DH-DSS-DES-CBC3-SHA"
 #define SSL3_TXT_DH_RSA_DES_40_CBC_SHA "EXP-DH-RSA-DES-CBC-SHA"
 #define SSL3_TXT_DH_RSA_DES_64_CBC_SHA "DH-RSA-DES-CBC-SHA"
 #define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA "DH-RSA-DES-CBC3-SHA"
 
 #define SSL3_TXT_DHE_DSS_DES_40_CBC_SHA "EXP-DHE-DSS-DES-CBC-SHA"
 #define SSL3_TXT_DHE_DSS_DES_64_CBC_SHA "DHE-DSS-DES-CBC-SHA"
 #define SSL3_TXT_DHE_DSS_DES_192_CBC3_SHA "DHE-DSS-DES-CBC3-SHA"
 #define SSL3_TXT_DHE_RSA_DES_40_CBC_SHA "EXP-DHE-RSA-DES-CBC-SHA"
 #define SSL3_TXT_DHE_RSA_DES_64_CBC_SHA "DHE-RSA-DES-CBC-SHA"
 #define SSL3_TXT_DHE_RSA_DES_192_CBC3_SHA "DHE-RSA-DES-CBC3-SHA"
 
 /*
  * This next block of six "EDH" labels is for backward compatibility with
  * older versions of OpenSSL.  New code should use the six "DHE" labels above
  * instead:
  */
 #define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA "EXP-EDH-DSS-DES-CBC-SHA"
 #define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA "EDH-DSS-DES-CBC-SHA"
 #define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA "EDH-DSS-DES-CBC3-SHA"
 #define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA "EXP-EDH-RSA-DES-CBC-SHA"
 #define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA "EDH-RSA-DES-CBC-SHA"
 #define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA "EDH-RSA-DES-CBC3-SHA"
 
 #define SSL3_TXT_ADH_RC4_40_MD5 "EXP-ADH-RC4-MD5"
 #define SSL3_TXT_ADH_RC4_128_MD5 "ADH-RC4-MD5"
 #define SSL3_TXT_ADH_DES_40_CBC_SHA "EXP-ADH-DES-CBC-SHA"
 #define SSL3_TXT_ADH_DES_64_CBC_SHA "ADH-DES-CBC-SHA"
 #define SSL3_TXT_ADH_DES_192_CBC_SHA "ADH-DES-CBC3-SHA"
 
 #define SSL3_SSL_SESSION_ID_LENGTH 32
 #define SSL3_MAX_SSL_SESSION_ID_LENGTH 32
 
 #define SSL3_MASTER_SECRET_SIZE 48
 #define SSL3_RANDOM_SIZE 32
 #define SSL3_SESSION_ID_SIZE 32
 #define SSL3_RT_HEADER_LENGTH 5
 
 #define SSL3_HM_HEADER_LENGTH 4
 
 #ifndef SSL3_ALIGN_PAYLOAD
 /*
  * Some will argue that this increases memory footprint, but it's not
  * actually true. Point is that malloc has to return at least 64-bit aligned
  * pointers, meaning that allocating 5 bytes wastes 3 bytes in either case.
  * Suggested pre-gaping simply moves these wasted bytes from the end of
  * allocated region to its front, but makes data payload aligned, which
  * improves performance:-)
  */
 #define SSL3_ALIGN_PAYLOAD 8
 #else
 #if (SSL3_ALIGN_PAYLOAD & (SSL3_ALIGN_PAYLOAD - 1)) != 0
 #error "insane SSL3_ALIGN_PAYLOAD"
 #undef SSL3_ALIGN_PAYLOAD
 #endif
 #endif
 
 /*
  * This is the maximum MAC (digest) size used by the SSL library. Currently
  * maximum of 20 is used by SHA1, but we reserve for future extension for
  * 512-bit hashes.
  */
 
 #define SSL3_RT_MAX_MD_SIZE 64
 
 /*
  * Maximum block size used in all ciphersuites. Currently 16 for AES.
  */
 
 #define SSL_RT_MAX_CIPHER_BLOCK_SIZE 16
 
 #define SSL3_RT_MAX_EXTRA (16384)
 
 /* Maximum plaintext length: defined by SSL/TLS standards */
 #define SSL3_RT_MAX_PLAIN_LENGTH 16384
 /* Maximum compression overhead: defined by SSL/TLS standards */
 #define SSL3_RT_MAX_COMPRESSED_OVERHEAD 1024
 
 /*
  * The standards give a maximum encryption overhead of 1024 bytes. In
  * practice the value is lower than this. The overhead is the maximum number
  * of padding bytes (256) plus the mac size.
  */
 #define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE)
 #define SSL3_RT_MAX_TLS13_ENCRYPTED_OVERHEAD 256
 
 /*
  * OpenSSL currently only uses a padding length of at most one block so the
  * send overhead is smaller.
  */
 
 #define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
     (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)
 
 /* If compression isn't used don't include the compression overhead */
 
 #ifdef OPENSSL_NO_COMP
 #define SSL3_RT_MAX_COMPRESSED_LENGTH SSL3_RT_MAX_PLAIN_LENGTH
 #else
 #define SSL3_RT_MAX_COMPRESSED_LENGTH \
     (SSL3_RT_MAX_PLAIN_LENGTH + SSL3_RT_MAX_COMPRESSED_OVERHEAD)
 #endif
 #define SSL3_RT_MAX_ENCRYPTED_LENGTH \
     (SSL3_RT_MAX_ENCRYPTED_OVERHEAD + SSL3_RT_MAX_COMPRESSED_LENGTH)
 #define SSL3_RT_MAX_TLS13_ENCRYPTED_LENGTH \
     (SSL3_RT_MAX_PLAIN_LENGTH + SSL3_RT_MAX_TLS13_ENCRYPTED_OVERHEAD)
 #define SSL3_RT_MAX_PACKET_SIZE \
     (SSL3_RT_MAX_ENCRYPTED_LENGTH + SSL3_RT_HEADER_LENGTH)
 
 #define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54"
 #define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52"
 
 /* SSL3_VERSION is defined in prov_ssl.h */
 #define SSL3_VERSION_MAJOR 0x03
 #define SSL3_VERSION_MINOR 0x00
 
 #define SSL3_RT_CHANGE_CIPHER_SPEC 20
 #define SSL3_RT_ALERT 21
 #define SSL3_RT_HANDSHAKE 22
 #define SSL3_RT_APPLICATION_DATA 23
 
 /* Pseudo content types to indicate additional parameters */
 #define TLS1_RT_CRYPTO 0x1000
 #define TLS1_RT_CRYPTO_PREMASTER (TLS1_RT_CRYPTO | 0x1)
 #define TLS1_RT_CRYPTO_CLIENT_RANDOM (TLS1_RT_CRYPTO | 0x2)
 #define TLS1_RT_CRYPTO_SERVER_RANDOM (TLS1_RT_CRYPTO | 0x3)
 #define TLS1_RT_CRYPTO_MASTER (TLS1_RT_CRYPTO | 0x4)
 
 #define TLS1_RT_CRYPTO_READ 0x0000
 #define TLS1_RT_CRYPTO_WRITE 0x0100
 #define TLS1_RT_CRYPTO_MAC (TLS1_RT_CRYPTO | 0x5)
 #define TLS1_RT_CRYPTO_KEY (TLS1_RT_CRYPTO | 0x6)
 #define TLS1_RT_CRYPTO_IV (TLS1_RT_CRYPTO | 0x7)
 #define TLS1_RT_CRYPTO_FIXED_IV (TLS1_RT_CRYPTO | 0x8)
 
 /* Pseudo content types for SSL/TLS header info */
 #define SSL3_RT_HEADER 0x100
 #define SSL3_RT_INNER_CONTENT_TYPE 0x101
 
 /* Pseudo content types for QUIC */
 #define SSL3_RT_QUIC_DATAGRAM 0x200
 #define SSL3_RT_QUIC_PACKET 0x201
 #define SSL3_RT_QUIC_FRAME_FULL 0x202
 #define SSL3_RT_QUIC_FRAME_HEADER 0x203
 #define SSL3_RT_QUIC_FRAME_PADDING 0x204
 
 #define SSL3_AL_WARNING 1
 #define SSL3_AL_FATAL 2
 
 #define SSL3_AD_CLOSE_NOTIFY 0
 #define SSL3_AD_UNEXPECTED_MESSAGE 10 /* fatal */
 #define SSL3_AD_BAD_RECORD_MAC 20 /* fatal */
 #define SSL3_AD_DECOMPRESSION_FAILURE 30 /* fatal */
 #define SSL3_AD_HANDSHAKE_FAILURE 40 /* fatal */
 #define SSL3_AD_NO_CERTIFICATE 41
 #define SSL3_AD_BAD_CERTIFICATE 42
 #define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
 #define SSL3_AD_CERTIFICATE_REVOKED 44
 #define SSL3_AD_CERTIFICATE_EXPIRED 45
 #define SSL3_AD_CERTIFICATE_UNKNOWN 46
 #define SSL3_AD_ILLEGAL_PARAMETER 47 /* fatal */
 
 #define TLS1_HB_REQUEST 1
 #define TLS1_HB_RESPONSE 2
 
 #define SSL3_CT_RSA_SIGN 1
 #define SSL3_CT_DSS_SIGN 2
 #define SSL3_CT_RSA_FIXED_DH 3
 #define SSL3_CT_DSS_FIXED_DH 4
 #define SSL3_CT_RSA_EPHEMERAL_DH 5
 #define SSL3_CT_DSS_EPHEMERAL_DH 6
 #define SSL3_CT_FORTEZZA_DMS 20
 /*
  * SSL3_CT_NUMBER is used to size arrays and it must be large enough to
  * contain all of the cert types defined for *either* SSLv3 and TLSv1.
  */
 #define SSL3_CT_NUMBER 12
 
 #if defined(TLS_CT_NUMBER)
 #if TLS_CT_NUMBER != SSL3_CT_NUMBER
 #error "SSL/TLS CT_NUMBER values do not match"
 #endif
 #endif
 
 /* No longer used as of OpenSSL 1.1.1 */
 #define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS 0x0001
 
 /* Removed from OpenSSL 1.1.0 */
 #define TLS1_FLAGS_TLS_PADDING_BUG 0x0
 
 #define TLS1_FLAGS_SKIP_CERT_VERIFY 0x0010
 
 /* Set if we encrypt then mac instead of usual mac then encrypt */
 #define TLS1_FLAGS_ENCRYPT_THEN_MAC_READ 0x0100
 #define TLS1_FLAGS_ENCRYPT_THEN_MAC TLS1_FLAGS_ENCRYPT_THEN_MAC_READ
 
 /* Set if extended master secret extension received from peer */
 #define TLS1_FLAGS_RECEIVED_EXTMS 0x0200
 
 #define TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE 0x0400
 
 #define TLS1_FLAGS_STATELESS 0x0800
 
 /* Set if extended master secret extension required on renegotiation */
 #define TLS1_FLAGS_REQUIRED_EXTMS 0x1000
 
 /* 0x2000 is reserved for TLS1_FLAGS_QUIC (internal) */
 /* 0x4000 is reserved for TLS1_FLAGS_QUIC_INTERNAL (internal) */
 
 #define SSL3_MT_HELLO_REQUEST 0
 #define SSL3_MT_CLIENT_HELLO 1
 #define SSL3_MT_SERVER_HELLO 2
 #define SSL3_MT_NEWSESSION_TICKET 4
 #define SSL3_MT_END_OF_EARLY_DATA 5
 #define SSL3_MT_ENCRYPTED_EXTENSIONS 8
 #define SSL3_MT_CERTIFICATE 11
 #define SSL3_MT_SERVER_KEY_EXCHANGE 12
 #define SSL3_MT_CERTIFICATE_REQUEST 13
 #define SSL3_MT_SERVER_DONE 14
 #define SSL3_MT_CERTIFICATE_VERIFY 15
 #define SSL3_MT_CLIENT_KEY_EXCHANGE 16
 #define SSL3_MT_FINISHED 20
 #define SSL3_MT_CERTIFICATE_URL 21
 #define SSL3_MT_CERTIFICATE_STATUS 22
 #define SSL3_MT_SUPPLEMENTAL_DATA 23
 #define SSL3_MT_KEY_UPDATE 24
 #define SSL3_MT_COMPRESSED_CERTIFICATE 25
 #ifndef OPENSSL_NO_NEXTPROTONEG
 #define SSL3_MT_NEXT_PROTO 67
 #endif
 #define SSL3_MT_MESSAGE_HASH 254
 #define DTLS1_MT_HELLO_VERIFY_REQUEST 3
 
 /* Dummy message type for handling CCS like a normal handshake message */
 #define SSL3_MT_CHANGE_CIPHER_SPEC 0x0101
 
 #define SSL3_MT_CCS 1
 
 /* These are used when changing over to a new cipher */
 #define SSL3_CC_READ 0x001
 #define SSL3_CC_WRITE 0x002
 #define SSL3_CC_CLIENT 0x010
 #define SSL3_CC_SERVER 0x020
 #define SSL3_CC_EARLY 0x040
 #define SSL3_CC_HANDSHAKE 0x080
 #define SSL3_CC_APPLICATION 0x100
 #define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT | SSL3_CC_WRITE)
 #define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER | SSL3_CC_READ)
 #define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT | SSL3_CC_READ)
 #define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER | SSL3_CC_WRITE)
 
 #ifdef __cplusplus
 }
 #endif
 #endif

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