src/libdigidoc/openssl/ssl/ssl_locl.h

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/* ssl/ssl_locl.h */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by 
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */

#ifndef HEADER_SSL_LOCL_H
#define HEADER_SSL_LOCL_H
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <errno.h>

#include "e_os.h"

#include <openssl/buffer.h>
#ifndef OPENSSL_NO_COMP
#include <openssl/comp.h>
#endif
#include <openssl/bio.h>
#include <openssl/stack.h>
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#include <openssl/err.h>
#include <openssl/ssl.h>
#include <openssl/symhacks.h>

#ifdef OPENSSL_BUILD_SHLIBSSL
# undef OPENSSL_EXTERN
# define OPENSSL_EXTERN OPENSSL_EXPORT
#endif

#define PKCS1_CHECK

#define c2l(c,l)        (l = ((unsigned long)(*((c)++)))     , \
                         l|=(((unsigned long)(*((c)++)))<< 8), \
                         l|=(((unsigned long)(*((c)++)))<<16), \
                         l|=(((unsigned long)(*((c)++)))<<24))

/* NOTE - c is not incremented as per c2l */
#define c2ln(c,l1,l2,n) { \
                        c+=n; \
                        l1=l2=0; \
                        switch (n) { \
                        case 8: l2 =((unsigned long)(*(--(c))))<<24; \
                        case 7: l2|=((unsigned long)(*(--(c))))<<16; \
                        case 6: l2|=((unsigned long)(*(--(c))))<< 8; \
                        case 5: l2|=((unsigned long)(*(--(c))));     \
                        case 4: l1 =((unsigned long)(*(--(c))))<<24; \
                        case 3: l1|=((unsigned long)(*(--(c))))<<16; \
                        case 2: l1|=((unsigned long)(*(--(c))))<< 8; \
                        case 1: l1|=((unsigned long)(*(--(c))));     \
                                } \
                        }

#define l2c(l,c)        (*((c)++)=(unsigned char)(((l)    )&0xff), \
                         *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
                         *((c)++)=(unsigned char)(((l)>>16)&0xff), \
                         *((c)++)=(unsigned char)(((l)>>24)&0xff))

#define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24, \
                         l|=((unsigned long)(*((c)++)))<<16, \
                         l|=((unsigned long)(*((c)++)))<< 8, \
                         l|=((unsigned long)(*((c)++))))

#define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
                         *((c)++)=(unsigned char)(((l)>>16)&0xff), \
                         *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
                         *((c)++)=(unsigned char)(((l)    )&0xff))

#define l2n6(l,c)       (*((c)++)=(unsigned char)(((l)>>40)&0xff), \
                         *((c)++)=(unsigned char)(((l)>>32)&0xff), \
                         *((c)++)=(unsigned char)(((l)>>24)&0xff), \
                         *((c)++)=(unsigned char)(((l)>>16)&0xff), \
                         *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
                         *((c)++)=(unsigned char)(((l)    )&0xff))

#define n2l6(c,l)       (l =((BN_ULLONG)(*((c)++)))<<40, \
                         l|=((BN_ULLONG)(*((c)++)))<<32, \
                         l|=((BN_ULLONG)(*((c)++)))<<24, \
                         l|=((BN_ULLONG)(*((c)++)))<<16, \
                         l|=((BN_ULLONG)(*((c)++)))<< 8, \
                         l|=((BN_ULLONG)(*((c)++))))

/* NOTE - c is not incremented as per l2c */
#define l2cn(l1,l2,c,n) { \
                        c+=n; \
                        switch (n) { \
                        case 8: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
                        case 7: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
                        case 6: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
                        case 5: *(--(c))=(unsigned char)(((l2)    )&0xff); \
                        case 4: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
                        case 3: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
                        case 2: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
                        case 1: *(--(c))=(unsigned char)(((l1)    )&0xff); \
                                } \
                        }

#define n2s(c,s)        ((s=(((unsigned int)(c[0]))<< 8)| \
                            (((unsigned int)(c[1]))    )),c+=2)
#define s2n(s,c)        ((c[0]=(unsigned char)(((s)>> 8)&0xff), \
                          c[1]=(unsigned char)(((s)    )&0xff)),c+=2)

#define n2l3(c,l)       ((l =(((unsigned long)(c[0]))<<16)| \
                             (((unsigned long)(c[1]))<< 8)| \
                             (((unsigned long)(c[2]))    )),c+=3)

#define l2n3(l,c)       ((c[0]=(unsigned char)(((l)>>16)&0xff), \
                          c[1]=(unsigned char)(((l)>> 8)&0xff), \
                          c[2]=(unsigned char)(((l)    )&0xff)),c+=3)

/* LOCAL STUFF */

#define SSL_DECRYPT     0
#define SSL_ENCRYPT     1

#define TWO_BYTE_BIT    0x80
#define SEC_ESC_BIT     0x40
#define TWO_BYTE_MASK   0x7fff
#define THREE_BYTE_MASK 0x3fff

#define INC32(a)        ((a)=((a)+1)&0xffffffffL)
#define DEC32(a)        ((a)=((a)-1)&0xffffffffL)
#define MAX_MAC_SIZE    20 /* up from 16 for SSLv3 */

/*
 * Define the Bitmasks for SSL_CIPHER.algorithms.
 * This bits are used packed as dense as possible. If new methods/ciphers
 * etc will be added, the bits a likely to change, so this information
 * is for internal library use only, even though SSL_CIPHER.algorithms
 * can be publicly accessed.
 * Use the according functions for cipher management instead.
 *
 * The bit mask handling in the selection and sorting scheme in
 * ssl_create_cipher_list() has only limited capabilities, reflecting
 * that the different entities within are mutually exclusive:
 * ONLY ONE BIT PER MASK CAN BE SET AT A TIME.
 */
#define SSL_MKEY_MASK           0x000000FFL
#define SSL_kRSA                0x00000001L /* RSA key exchange */
#define SSL_kDHr                0x00000002L /* DH cert RSA CA cert */
#define SSL_kDHd                0x00000004L /* DH cert DSA CA cert */
#define SSL_kFZA                0x00000008L
#define SSL_kEDH                0x00000010L /* tmp DH key no DH cert */
#define SSL_kKRB5               0x00000020L /* Kerberos5 key exchange */
#define SSL_kECDH               0x00000040L /* ECDH w/ long-term keys */
#define SSL_kECDHE              0x00000080L /* ephemeral ECDH */
#define SSL_EDH                 (SSL_kEDH|(SSL_AUTH_MASK^SSL_aNULL))

#define SSL_AUTH_MASK           0x00007F00L
#define SSL_aRSA                0x00000100L /* Authenticate with RSA */
#define SSL_aDSS                0x00000200L /* Authenticate with DSS */
#define SSL_DSS                 SSL_aDSS
#define SSL_aFZA                0x00000400L
#define SSL_aNULL               0x00000800L /* no Authenticate, ADH */
#define SSL_aDH                 0x00001000L /* no Authenticate, ADH */
#define SSL_aKRB5               0x00002000L /* Authenticate with KRB5 */
#define SSL_aECDSA              0x00004000L /* Authenticate with ECDSA */

#define SSL_NULL                (SSL_eNULL)
#define SSL_ADH                 (SSL_kEDH|SSL_aNULL)
#define SSL_RSA                 (SSL_kRSA|SSL_aRSA)
#define SSL_DH                  (SSL_kDHr|SSL_kDHd|SSL_kEDH)
#define SSL_ECDH                (SSL_kECDH|SSL_kECDHE)
#define SSL_FZA                 (SSL_aFZA|SSL_kFZA|SSL_eFZA)
#define SSL_KRB5                (SSL_kKRB5|SSL_aKRB5)

#define SSL_ENC_MASK            0x1C3F8000L
#define SSL_DES                 0x00008000L
#define SSL_3DES                0x00010000L
#define SSL_RC4                 0x00020000L
#define SSL_RC2                 0x00040000L
#define SSL_IDEA                0x00080000L
#define SSL_eFZA                0x00100000L
#define SSL_eNULL               0x00200000L
#define SSL_AES                 0x04000000L
#define SSL_CAMELLIA            0x08000000L
#define SSL_SEED                0x10000000L

#define SSL_MAC_MASK            0x00c00000L
#define SSL_MD5                 0x00400000L
#define SSL_SHA1                0x00800000L
#define SSL_SHA                 (SSL_SHA1)

#define SSL_SSL_MASK            0x03000000L
#define SSL_SSLV2               0x01000000L
#define SSL_SSLV3               0x02000000L
#define SSL_TLSV1               SSL_SSLV3       /* for now */

/* we have used 1fffffff - 3 bits left to go. */

/*
 * Export and cipher strength information. For each cipher we have to decide
 * whether it is exportable or not. This information is likely to change
 * over time, since the export control rules are no static technical issue.
 *
 * Independent of the export flag the cipher strength is sorted into classes.
 * SSL_EXP40 was denoting the 40bit US export limit of past times, which now
 * is at 56bit (SSL_EXP56). If the exportable cipher class is going to change
 * again (eg. to 64bit) the use of "SSL_EXP*" becomes blurred even more,
 * since SSL_EXP64 could be similar to SSL_LOW.
 * For this reason SSL_MICRO and SSL_MINI macros are included to widen the
 * namespace of SSL_LOW-SSL_HIGH to lower values. As development of speed
 * and ciphers goes, another extension to SSL_SUPER and/or SSL_ULTRA would
 * be possible.
 */
#define SSL_EXP_MASK            0x00000003L
#define SSL_NOT_EXP             0x00000001L
#define SSL_EXPORT              0x00000002L

#define SSL_STRONG_MASK         0x000000fcL
#define SSL_STRONG_NONE         0x00000004L
#define SSL_EXP40               0x00000008L
#define SSL_MICRO               (SSL_EXP40)
#define SSL_EXP56               0x00000010L
#define SSL_MINI                (SSL_EXP56)
#define SSL_LOW                 0x00000020L
#define SSL_MEDIUM              0x00000040L
#define SSL_HIGH                0x00000080L
#define SSL_FIPS                0x00000100L

/* we have used 000001ff - 23 bits left to go */

/*
 * Macros to check the export status and cipher strength for export ciphers.
 * Even though the macros for EXPORT and EXPORT40/56 have similar names,
 * their meaning is different:
 * *_EXPORT macros check the 'exportable' status.
 * *_EXPORT40/56 macros are used to check whether a certain cipher strength
 *          is given.
 * Since the SSL_IS_EXPORT* and SSL_EXPORT* macros depend on the correct
 * algorithm structure element to be passed (algorithms, algo_strength) and no
 * typechecking can be done as they are all of type unsigned long, their
 * direct usage is discouraged.
 * Use the SSL_C_* macros instead.
 */
#define SSL_IS_EXPORT(a)        ((a)&SSL_EXPORT)
#define SSL_IS_EXPORT56(a)      ((a)&SSL_EXP56)
#define SSL_IS_EXPORT40(a)      ((a)&SSL_EXP40)
#define SSL_C_IS_EXPORT(c)      SSL_IS_EXPORT((c)->algo_strength)
#define SSL_C_IS_EXPORT56(c)    SSL_IS_EXPORT56((c)->algo_strength)
#define SSL_C_IS_EXPORT40(c)    SSL_IS_EXPORT40((c)->algo_strength)

#define SSL_EXPORT_KEYLENGTH(a,s)       (SSL_IS_EXPORT40(s) ? 5 : \
                                 ((a)&SSL_ENC_MASK) == SSL_DES ? 8 : 7)
#define SSL_EXPORT_PKEYLENGTH(a) (SSL_IS_EXPORT40(a) ? 512 : 1024)
#define SSL_C_EXPORT_KEYLENGTH(c)       SSL_EXPORT_KEYLENGTH((c)->algorithms, \
                                (c)->algo_strength)
#define SSL_C_EXPORT_PKEYLENGTH(c)      SSL_EXPORT_PKEYLENGTH((c)->algo_strength)


#define SSL_ALL                 0xffffffffL
#define SSL_ALL_CIPHERS         (SSL_MKEY_MASK|SSL_AUTH_MASK|SSL_ENC_MASK|\
                                SSL_MAC_MASK)
#define SSL_ALL_STRENGTHS       (SSL_EXP_MASK|SSL_STRONG_MASK)

/* Mostly for SSLv3 */
#define SSL_PKEY_RSA_ENC        0
#define SSL_PKEY_RSA_SIGN       1
#define SSL_PKEY_DSA_SIGN       2
#define SSL_PKEY_DH_RSA         3
#define SSL_PKEY_DH_DSA         4
#define SSL_PKEY_ECC            5
#define SSL_PKEY_NUM            6

/* SSL_kRSA <- RSA_ENC | (RSA_TMP & RSA_SIGN) |
 *          <- (EXPORT & (RSA_ENC | RSA_TMP) & RSA_SIGN)
 * SSL_kDH  <- DH_ENC & (RSA_ENC | RSA_SIGN | DSA_SIGN)
 * SSL_kEDH <- RSA_ENC | RSA_SIGN | DSA_SIGN
 * SSL_aRSA <- RSA_ENC | RSA_SIGN
 * SSL_aDSS <- DSA_SIGN
 */

/*
#define CERT_INVALID            0
#define CERT_PUBLIC_KEY         1
#define CERT_PRIVATE_KEY        2
*/

#ifndef OPENSSL_NO_EC
/* From ECC-TLS draft, used in encoding the curve type in 
 * ECParameters
 */
#define EXPLICIT_PRIME_CURVE_TYPE  1   
#define EXPLICIT_CHAR2_CURVE_TYPE  2
#define NAMED_CURVE_TYPE           3
#endif  /* OPENSSL_NO_EC */

typedef struct cert_pkey_st
        {
        X509 *x509;
        EVP_PKEY *privatekey;
        } CERT_PKEY;

typedef struct cert_st
        {
        /* Current active set */
        CERT_PKEY *key; /* ALWAYS points to an element of the pkeys array
                         * Probably it would make more sense to store
                         * an index, not a pointer. */
 
        /* The following masks are for the key and auth
         * algorithms that are supported by the certs below */
        int valid;
        unsigned long mask;
        unsigned long export_mask;
#ifndef OPENSSL_NO_RSA
        RSA *rsa_tmp;
        RSA *(*rsa_tmp_cb)(SSL *ssl,int is_export,int keysize);
#endif
#ifndef OPENSSL_NO_DH
        DH *dh_tmp;
        DH *(*dh_tmp_cb)(SSL *ssl,int is_export,int keysize);
#endif
#ifndef OPENSSL_NO_ECDH
        EC_KEY *ecdh_tmp;
        /* Callback for generating ephemeral ECDH keys */
        EC_KEY *(*ecdh_tmp_cb)(SSL *ssl,int is_export,int keysize);
#endif

        CERT_PKEY pkeys[SSL_PKEY_NUM];

        int references; /* >1 only if SSL_copy_session_id is used */
        } CERT;


typedef struct sess_cert_st
        {
        STACK_OF(X509) *cert_chain; /* as received from peer (not for SSL2) */

        /* The 'peer_...' members are used only by clients. */
        int peer_cert_type;

        CERT_PKEY *peer_key; /* points to an element of peer_pkeys (never NULL!) */
        CERT_PKEY peer_pkeys[SSL_PKEY_NUM];
        /* Obviously we don't have the private keys of these,
         * so maybe we shouldn't even use the CERT_PKEY type here. */

#ifndef OPENSSL_NO_RSA
        RSA *peer_rsa_tmp; /* not used for SSL 2 */
#endif
#ifndef OPENSSL_NO_DH
        DH *peer_dh_tmp; /* not used for SSL 2 */
#endif
#ifndef OPENSSL_NO_ECDH
        EC_KEY *peer_ecdh_tmp;
#endif

        int references; /* actually always 1 at the moment */
        } SESS_CERT;


/*#define MAC_DEBUG     */

/*#define ERR_DEBUG     */
/*#define ABORT_DEBUG   */
/*#define PKT_DEBUG 1   */
/*#define DES_DEBUG     */
/*#define DES_OFB_DEBUG */
/*#define SSL_DEBUG     */
/*#define RSA_DEBUG     */ 
/*#define IDEA_DEBUG    */ 

#define FP_ICC  (int (*)(const void *,const void *))
#define ssl_put_cipher_by_char(ssl,ciph,ptr) \
                ((ssl)->method->put_cipher_by_char((ciph),(ptr)))
#define ssl_get_cipher_by_char(ssl,ptr) \
                ((ssl)->method->get_cipher_by_char(ptr))

/* This is for the SSLv3/TLSv1.0 differences in crypto/hash stuff
 * It is a bit of a mess of functions, but hell, think of it as
 * an opaque structure :-) */
typedef struct ssl3_enc_method
        {
        int (*enc)(SSL *, int);
        int (*mac)(SSL *, unsigned char *, int);
        int (*setup_key_block)(SSL *);
        int (*generate_master_secret)(SSL *, unsigned char *, unsigned char *, int);
        int (*change_cipher_state)(SSL *, int);
        int (*final_finish_mac)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char *, int, unsigned char *);
        int finish_mac_length;
        int (*cert_verify_mac)(SSL *, EVP_MD_CTX *, unsigned char *);
        const char *client_finished_label;
        int client_finished_label_len;
        const char *server_finished_label;
        int server_finished_label_len;
        int (*alert_value)(int);
        } SSL3_ENC_METHOD;

#ifndef OPENSSL_NO_COMP
/* Used for holding the relevant compression methods loaded into SSL_CTX */
typedef struct ssl3_comp_st
        {
        int comp_id;    /* The identifier byte for this compression type */
        char *name;     /* Text name used for the compression type */
        COMP_METHOD *method; /* The method :-) */
        } SSL3_COMP;
#endif

extern SSL3_ENC_METHOD ssl3_undef_enc_method;
OPENSSL_EXTERN SSL_CIPHER ssl2_ciphers[];
OPENSSL_EXTERN SSL_CIPHER ssl3_ciphers[];


SSL_METHOD *ssl_bad_method(int ver);
SSL_METHOD *sslv2_base_method(void);
SSL_METHOD *sslv23_base_method(void);
SSL_METHOD *sslv3_base_method(void);

extern SSL3_ENC_METHOD TLSv1_enc_data;
extern SSL3_ENC_METHOD SSLv3_enc_data;
extern SSL3_ENC_METHOD DTLSv1_enc_data;

#define IMPLEMENT_tls1_meth_func(func_name, s_accept, s_connect, s_get_meth) \
SSL_METHOD *func_name(void)  \
        { \
        static SSL_METHOD func_name##_data= { \
                TLS1_VERSION, \
                tls1_new, \
                tls1_clear, \
                tls1_free, \
                s_accept, \
                s_connect, \
                ssl3_read, \
                ssl3_peek, \
                ssl3_write, \
                ssl3_shutdown, \
                ssl3_renegotiate, \
                ssl3_renegotiate_check, \
                ssl3_get_message, \
                ssl3_read_bytes, \
                ssl3_write_bytes, \
                ssl3_dispatch_alert, \
                ssl3_ctrl, \
                ssl3_ctx_ctrl, \
                ssl3_get_cipher_by_char, \
                ssl3_put_cipher_by_char, \
                ssl3_pending, \
                ssl3_num_ciphers, \
                ssl3_get_cipher, \
                s_get_meth, \
                tls1_default_timeout, \
                &TLSv1_enc_data, \
                ssl_undefined_void_function, \
                ssl3_callback_ctrl, \
                ssl3_ctx_callback_ctrl, \
        }; \
        return &func_name##_data; \
        }

#define IMPLEMENT_ssl3_meth_func(func_name, s_accept, s_connect, s_get_meth) \
SSL_METHOD *func_name(void)  \
        { \
        static SSL_METHOD func_name##_data= { \
                SSL3_VERSION, \
                ssl3_new, \
                ssl3_clear, \
                ssl3_free, \
                s_accept, \
                s_connect, \
                ssl3_read, \
                ssl3_peek, \
                ssl3_write, \
                ssl3_shutdown, \
                ssl3_renegotiate, \
                ssl3_renegotiate_check, \
                ssl3_get_message, \
                ssl3_read_bytes, \
                ssl3_write_bytes, \
                ssl3_dispatch_alert, \
                ssl3_ctrl, \
                ssl3_ctx_ctrl, \
                ssl3_get_cipher_by_char, \
                ssl3_put_cipher_by_char, \
                ssl3_pending, \
                ssl3_num_ciphers, \
                ssl3_get_cipher, \
                s_get_meth, \
                ssl3_default_timeout, \
                &SSLv3_enc_data, \
                ssl_undefined_void_function, \
                ssl3_callback_ctrl, \
                ssl3_ctx_callback_ctrl, \
        }; \
        return &func_name##_data; \
        }

#define IMPLEMENT_ssl23_meth_func(func_name, s_accept, s_connect, s_get_meth) \
SSL_METHOD *func_name(void)  \
        { \
        static SSL_METHOD func_name##_data= { \
        TLS1_VERSION, \
        tls1_new, \
        tls1_clear, \
        tls1_free, \
        s_accept, \
        s_connect, \
        ssl23_read, \
        ssl23_peek, \
        ssl23_write, \
        ssl_undefined_function, \
        ssl_undefined_function, \
        ssl_ok, \
        ssl3_get_message, \
        ssl3_read_bytes, \
        ssl3_write_bytes, \
        ssl3_dispatch_alert, \
        ssl3_ctrl, \
        ssl3_ctx_ctrl, \
        ssl23_get_cipher_by_char, \
        ssl23_put_cipher_by_char, \
        ssl_undefined_const_function, \
        ssl23_num_ciphers, \
        ssl23_get_cipher, \
        s_get_meth, \
        ssl23_default_timeout, \
        &ssl3_undef_enc_method, \
        ssl_undefined_void_function, \
        ssl3_callback_ctrl, \
        ssl3_ctx_callback_ctrl, \
        }; \
        return &func_name##_data; \
        }

#define IMPLEMENT_ssl2_meth_func(func_name, s_accept, s_connect, s_get_meth) \
SSL_METHOD *func_name(void)  \
        { \
        static SSL_METHOD func_name##_data= { \
                SSL2_VERSION, \
                ssl2_new,       /* local */ \
                ssl2_clear,     /* local */ \
                ssl2_free,      /* local */ \
                s_accept, \
                s_connect, \
                ssl2_read, \
                ssl2_peek, \
                ssl2_write, \
                ssl2_shutdown, \
                ssl_ok, /* NULL - renegotiate */ \
                ssl_ok, /* NULL - check renegotiate */ \
                NULL, /* NULL - ssl_get_message */ \
                NULL, /* NULL - ssl_get_record */ \
                NULL, /* NULL - ssl_write_bytes */ \
                NULL, /* NULL - dispatch_alert */ \
                ssl2_ctrl,      /* local */ \
                ssl2_ctx_ctrl,  /* local */ \
                ssl2_get_cipher_by_char, \
                ssl2_put_cipher_by_char, \
                ssl2_pending, \
                ssl2_num_ciphers, \
                ssl2_get_cipher, \
                s_get_meth, \
                ssl2_default_timeout, \
                &ssl3_undef_enc_method, \
                ssl_undefined_void_function, \
                ssl2_callback_ctrl,     /* local */ \
                ssl2_ctx_callback_ctrl, /* local */ \
        }; \
        return &func_name##_data; \
        }

#define IMPLEMENT_dtls1_meth_func(func_name, s_accept, s_connect, s_get_meth) \
SSL_METHOD *func_name(void)  \
        { \
        static SSL_METHOD func_name##_data= { \
                DTLS1_VERSION, \
                dtls1_new, \
                dtls1_clear, \
                dtls1_free, \
                s_accept, \
                s_connect, \
                ssl3_read, \
                ssl3_peek, \
                ssl3_write, \
                ssl3_shutdown, \
                ssl3_renegotiate, \
                ssl3_renegotiate_check, \
                dtls1_get_message, \
                dtls1_read_bytes, \
                dtls1_write_app_data_bytes, \
                dtls1_dispatch_alert, \
                dtls1_ctrl, \
                ssl3_ctx_ctrl, \
                ssl3_get_cipher_by_char, \
                ssl3_put_cipher_by_char, \
                ssl3_pending, \
                ssl3_num_ciphers, \
                dtls1_get_cipher, \
                s_get_meth, \
                dtls1_default_timeout, \
                &DTLSv1_enc_data, \
                ssl_undefined_void_function, \
                ssl3_callback_ctrl, \
                ssl3_ctx_callback_ctrl, \
        }; \
        return &func_name##_data; \
        }

void ssl_clear_cipher_ctx(SSL *s);
int ssl_clear_bad_session(SSL *s);
CERT *ssl_cert_new(void);
CERT *ssl_cert_dup(CERT *cert);
int ssl_cert_inst(CERT **o);
void ssl_cert_free(CERT *c);
SESS_CERT *ssl_sess_cert_new(void);
void ssl_sess_cert_free(SESS_CERT *sc);
int ssl_set_peer_cert_type(SESS_CERT *c, int type);
int ssl_get_new_session(SSL *s, int session);
int ssl_get_prev_session(SSL *s, unsigned char *session,int len, const unsigned char *limit);
int ssl_cipher_id_cmp(const SSL_CIPHER *a,const SSL_CIPHER *b);
int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
                        const SSL_CIPHER * const *bp);
STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
                                               STACK_OF(SSL_CIPHER) **skp);
int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
                             int (*put_cb)(const SSL_CIPHER *, unsigned char *));
STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *meth,
                                             STACK_OF(SSL_CIPHER) **pref,
                                             STACK_OF(SSL_CIPHER) **sorted,
                                             const char *rule_str);
void ssl_update_cache(SSL *s, int mode);
int ssl_cipher_get_evp(const SSL_SESSION *s,const EVP_CIPHER **enc,
                       const EVP_MD **md,SSL_COMP **comp);
int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk);
int ssl_undefined_function(SSL *s);
int ssl_undefined_void_function(void);
int ssl_undefined_const_function(const SSL *s);
X509 *ssl_get_server_send_cert(SSL *);
EVP_PKEY *ssl_get_sign_pkey(SSL *,SSL_CIPHER *);
int ssl_cert_type(X509 *x,EVP_PKEY *pkey);
void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher);
STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s);
int ssl_verify_alarm_type(long type);
void ssl_load_ciphers(void);

int ssl2_enc_init(SSL *s, int client);
int ssl2_generate_key_material(SSL *s);
void ssl2_enc(SSL *s,int send_data);
void ssl2_mac(SSL *s,unsigned char *mac,int send_data);
SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p);
int ssl2_put_cipher_by_char(const SSL_CIPHER *c,unsigned char *p);
int ssl2_part_read(SSL *s, unsigned long f, int i);
int ssl2_do_write(SSL *s);
int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data);
void ssl2_return_error(SSL *s,int reason);
void ssl2_write_error(SSL *s);
int ssl2_num_ciphers(void);
SSL_CIPHER *ssl2_get_cipher(unsigned int u);
int     ssl2_new(SSL *s);
void    ssl2_free(SSL *s);
int     ssl2_accept(SSL *s);
int     ssl2_connect(SSL *s);
int     ssl2_read(SSL *s, void *buf, int len);
int     ssl2_peek(SSL *s, void *buf, int len);
int     ssl2_write(SSL *s, const void *buf, int len);
int     ssl2_shutdown(SSL *s);
void    ssl2_clear(SSL *s);
long    ssl2_ctrl(SSL *s,int cmd, long larg, void *parg);
long    ssl2_ctx_ctrl(SSL_CTX *s,int cmd, long larg, void *parg);
long    ssl2_callback_ctrl(SSL *s,int cmd, void (*fp)(void));
long    ssl2_ctx_callback_ctrl(SSL_CTX *s,int cmd, void (*fp)(void));
int     ssl2_pending(const SSL *s);
long    ssl2_default_timeout(void );

SSL_CIPHER *ssl3_get_cipher_by_char(const unsigned char *p);
int ssl3_put_cipher_by_char(const SSL_CIPHER *c,unsigned char *p);
void ssl3_init_finished_mac(SSL *s);
int ssl3_send_server_certificate(SSL *s);
int ssl3_send_newsession_ticket(SSL *s);
int ssl3_send_cert_status(SSL *s);
int ssl3_get_finished(SSL *s,int state_a,int state_b);
int ssl3_setup_key_block(SSL *s);
int ssl3_send_change_cipher_spec(SSL *s,int state_a,int state_b);
int ssl3_change_cipher_state(SSL *s,int which);
void ssl3_cleanup_key_block(SSL *s);
int ssl3_do_write(SSL *s,int type);
int ssl3_send_alert(SSL *s,int level, int desc);
int ssl3_generate_master_secret(SSL *s, unsigned char *out,
        unsigned char *p, int len);
int ssl3_get_req_cert_type(SSL *s,unsigned char *p);
long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok);
int ssl3_send_finished(SSL *s, int a, int b, const char *sender,int slen);
int ssl3_num_ciphers(void);
SSL_CIPHER *ssl3_get_cipher(unsigned int u);
int ssl3_renegotiate(SSL *ssl); 
int ssl3_renegotiate_check(SSL *ssl); 
int ssl3_dispatch_alert(SSL *s);
int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
int ssl3_write_bytes(SSL *s, int type, const void *buf, int len);
int ssl3_final_finish_mac(SSL *s, EVP_MD_CTX *ctx1, EVP_MD_CTX *ctx2,
        const char *sender, int slen,unsigned char *p);
int ssl3_cert_verify_mac(SSL *s, EVP_MD_CTX *in, unsigned char *p);
void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len);
int ssl3_enc(SSL *s, int send_data);
int ssl3_mac(SSL *ssl, unsigned char *md, int send_data);
unsigned long ssl3_output_cert_chain(SSL *s, X509 *x);
SSL_CIPHER *ssl3_choose_cipher(SSL *ssl,STACK_OF(SSL_CIPHER) *clnt,
                               STACK_OF(SSL_CIPHER) *srvr);
int     ssl3_setup_buffers(SSL *s);
int     ssl3_new(SSL *s);
void    ssl3_free(SSL *s);
int     ssl3_accept(SSL *s);
int     ssl3_connect(SSL *s);
int     ssl3_read(SSL *s, void *buf, int len);
int     ssl3_peek(SSL *s, void *buf, int len);
int     ssl3_write(SSL *s, const void *buf, int len);
int     ssl3_shutdown(SSL *s);
void    ssl3_clear(SSL *s);
long    ssl3_ctrl(SSL *s,int cmd, long larg, void *parg);
long    ssl3_ctx_ctrl(SSL_CTX *s,int cmd, long larg, void *parg);
long    ssl3_callback_ctrl(SSL *s,int cmd, void (*fp)(void));
long    ssl3_ctx_callback_ctrl(SSL_CTX *s,int cmd, void (*fp)(void));
int     ssl3_pending(const SSL *s);

void ssl3_record_sequence_update(unsigned char *seq);
int ssl3_do_change_cipher_spec(SSL *ssl);
long ssl3_default_timeout(void );

int ssl23_num_ciphers(void );
SSL_CIPHER *ssl23_get_cipher(unsigned int u);
int ssl23_read(SSL *s, void *buf, int len);
int ssl23_peek(SSL *s, void *buf, int len);
int ssl23_write(SSL *s, const void *buf, int len);
int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p);
SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p);
long ssl23_default_timeout(void );

long tls1_default_timeout(void);
int dtls1_do_write(SSL *s,int type);
int ssl3_read_n(SSL *s, int n, int max, int extend);
int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
int ssl3_do_compress(SSL *ssl);
int ssl3_do_uncompress(SSL *ssl);
int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
        unsigned int len);
unsigned char *dtls1_set_message_header(SSL *s, 
        unsigned char *p, unsigned char mt,     unsigned long len, 
        unsigned long frag_off, unsigned long frag_len);

int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf, int len);
int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);

int dtls1_send_change_cipher_spec(SSL *s, int a, int b);
int dtls1_send_finished(SSL *s, int a, int b, const char *sender, int slen);
unsigned long dtls1_output_cert_chain(SSL *s, X509 *x);
int dtls1_read_failed(SSL *s, int code);
int dtls1_buffer_message(SSL *s, int ccs);
int dtls1_retransmit_message(SSL *s, unsigned short seq, 
        unsigned long frag_off, int *found);
int dtls1_get_queue_priority(unsigned short seq, int is_ccs);
int dtls1_retransmit_buffered_messages(SSL *s);
void dtls1_clear_record_buffer(SSL *s);
void dtls1_get_message_header(unsigned char *data, struct hm_header_st *msg_hdr);
void dtls1_get_ccs_header(unsigned char *data, struct ccs_header_st *ccs_hdr);
void dtls1_reset_seq_numbers(SSL *s, int rw);
long dtls1_default_timeout(void);
struct timeval* dtls1_get_timeout(SSL *s, struct timeval* timeleft);
int dtls1_handle_timeout(SSL *s);
SSL_CIPHER *dtls1_get_cipher(unsigned int u);
void dtls1_start_timer(SSL *s);
void dtls1_stop_timer(SSL *s);
int dtls1_is_timer_expired(SSL *s);
void dtls1_double_timeout(SSL *s);
int dtls1_send_newsession_ticket(SSL *s);


/* some client-only functions */
int ssl3_client_hello(SSL *s);
int ssl3_get_server_hello(SSL *s);
int ssl3_get_certificate_request(SSL *s);
int ssl3_get_new_session_ticket(SSL *s);
int ssl3_get_cert_status(SSL *s);
int ssl3_get_server_done(SSL *s);
int ssl3_send_client_verify(SSL *s);
int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
int ssl3_send_client_certificate(SSL *s);
int ssl3_send_client_key_exchange(SSL *s);
int ssl3_get_key_exchange(SSL *s);
int ssl3_get_server_certificate(SSL *s);
int ssl3_check_cert_and_algorithm(SSL *s);
#ifndef OPENSSL_NO_TLSEXT
int ssl3_check_finished(SSL *s);
#endif

int dtls1_client_hello(SSL *s);
int dtls1_send_client_certificate(SSL *s);
int dtls1_send_client_key_exchange(SSL *s);
int dtls1_send_client_verify(SSL *s);

/* some server-only functions */
int ssl3_get_client_hello(SSL *s);
int ssl3_send_server_hello(SSL *s);
int ssl3_send_hello_request(SSL *s);
int ssl3_send_server_key_exchange(SSL *s);
int ssl3_send_certificate_request(SSL *s);
int ssl3_send_server_done(SSL *s);
int ssl3_check_client_hello(SSL *s);
int ssl3_get_client_certificate(SSL *s);
int ssl3_get_client_key_exchange(SSL *s);
int ssl3_get_cert_verify(SSL *s);

int dtls1_send_hello_request(SSL *s);
int dtls1_send_server_hello(SSL *s);
int dtls1_send_server_certificate(SSL *s);
int dtls1_send_server_key_exchange(SSL *s);
int dtls1_send_certificate_request(SSL *s);
int dtls1_send_server_done(SSL *s);



int ssl23_accept(SSL *s);
int ssl23_connect(SSL *s);
int ssl23_read_bytes(SSL *s, int n);
int ssl23_write_bytes(SSL *s);

int tls1_new(SSL *s);
void tls1_free(SSL *s);
void tls1_clear(SSL *s);
long tls1_ctrl(SSL *s,int cmd, long larg, void *parg);
long tls1_callback_ctrl(SSL *s,int cmd, void (*fp)(void));
SSL_METHOD *tlsv1_base_method(void );

int dtls1_new(SSL *s);
int     dtls1_accept(SSL *s);
int     dtls1_connect(SSL *s);
void dtls1_free(SSL *s);
void dtls1_clear(SSL *s);
long dtls1_ctrl(SSL *s,int cmd, long larg, void *parg);
SSL_METHOD *dtlsv1_base_method(void );

long dtls1_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok);
int dtls1_get_record(SSL *s);
int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
        unsigned int len, int create_empty_fragement);
int dtls1_dispatch_alert(SSL *s);
int dtls1_enc(SSL *s, int snd);

int ssl_init_wbio_buffer(SSL *s, int push);
void ssl_free_wbio_buffer(SSL *s);

int tls1_change_cipher_state(SSL *s, int which);
int tls1_setup_key_block(SSL *s);
int tls1_enc(SSL *s, int snd);
int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
        const char *str, int slen, unsigned char *p);
int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in, unsigned char *p);
int tls1_mac(SSL *ssl, unsigned char *md, int snd);
int tls1_generate_master_secret(SSL *s, unsigned char *out,
        unsigned char *p, int len);
int tls1_alert_code(int code);
int ssl3_alert_code(int code);
int ssl_ok(SSL *s);

int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);

SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n);

#ifndef OPENSSL_NO_TLSEXT
unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit); 
unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit); 
int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **data, unsigned char *d, int n, int *al);
int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **data, unsigned char *d, int n, int *al);
int ssl_prepare_clienthello_tlsext(SSL *s);
int ssl_prepare_serverhello_tlsext(SSL *s);
int ssl_check_clienthello_tlsext(SSL *s);
int ssl_check_serverhello_tlsext(SSL *s);

#ifdef OPENSSL_NO_SHA256
#define tlsext_tick_md  EVP_sha1
#else
#define tlsext_tick_md  EVP_sha256
#endif
int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
                                const unsigned char *limit, SSL_SESSION **ret);
EVP_MD_CTX* ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) ;
void ssl_clear_hash_ctx(EVP_MD_CTX **hash);

int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
                                        int maxlen);
int ssl_parse_serverhello_renegotiate_ext(SSL *s, unsigned char *d, int len,
                                          int *al);
int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
                                        int maxlen);
int ssl_parse_clienthello_renegotiate_ext(SSL *s, unsigned char *d, int len,
                                          int *al);
#endif

#endif