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ssl_locl.h

/* 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).
 *
 */

#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>
#include <openssl/comp.h>
#include <openssl/bio.h>
#include <openssl/crypto.h>
#include <openssl/evp.h>
#include <openssl/stack.h>
#include <openssl/x509.h>
#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))

/* 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         0x0000003FL
#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_EDH               (SSL_kEDH|(SSL_AUTH_MASK^SSL_aNULL))

#define SSL_AUTH_MASK         0x00000FC0L
#define SSL_aRSA        0x00000040L /* Authenticate with RSA */
#define SSL_aDSS        0x00000080L /* Authenticate with DSS */
#define SSL_DSS         SSL_aDSS
#define SSL_aFZA        0x00000100L
#define SSL_aNULL             0x00000200L /* no Authenticate, ADH */
#define SSL_aDH         0x00000400L /* no Authenticate, ADH */
#define SSL_aKRB5               0x00000800L /* Authenticate with KRB5 */

#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_FZA               (SSL_aFZA|SSL_kFZA|SSL_eFZA)
#define SSL_KRB5                (SSL_kKRB5|SSL_aKRB5)

#define SSL_ENC_MASK          0x0087F000L
#define SSL_DES               0x00001000L
#define SSL_3DES        0x00002000L
#define SSL_RC4               0x00004000L
#define SSL_RC2               0x00008000L
#define SSL_IDEA        0x00010000L
#define SSL_eFZA        0x00020000L
#define SSL_eNULL       0x00040000L
#define SSL_AES               0x00800000L

#define SSL_MAC_MASK          0x00180000L
#define SSL_MD5               0x00080000L
#define SSL_SHA1        0x00100000L
#define SSL_SHA               (SSL_SHA1)

#define SSL_SSL_MASK          0x00600000L
#define SSL_SSLV2       0x00200000L
#define SSL_SSLV3       0x00400000L
#define SSL_TLSV1       SSL_SSLV3   /* for now */

/* we have used 007fffff - 9 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_NUM          5

/* 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
*/

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

      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

      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;

/* 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;

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

#ifdef OPENSSL_SYS_VMS
#undef SSL_COMP_get_compression_methods
#define SSL_COMP_get_compression_methods  SSL_COMP_get_compress_methods
#endif


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);

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);
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);
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(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);
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);

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, 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)());
long  ssl2_ctx_callback_ctrl(SSL_CTX *s,int cmd, void (*fp)());
int   ssl2_pending(SSL *s);

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_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);
void 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)());
long  ssl3_ctx_callback_ctrl(SSL_CTX *s,int cmd, void (*fp)());
int   ssl3_pending(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)());
SSL_METHOD *tlsv1_base_method(void );

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);

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


#endif

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