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//usr/include/openssl/ssl3.h

/*
 * 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