File indexing completed on 2024-04-21 14:56:08

 /* This file is part of the KDE libraries
    Copyright (C) 2001-2003 George Staikos <staikos@kde.org>
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License version 2 as published by the Free Software Foundation.
 
    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.
 
    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 */
 
 // IF YOU ARE USING THIS CLASS, YOU ARE MAKING A MISTAKE.
 
 #ifndef __KOPENSSLPROXY_H
 #define __KOPENSSLPROXY_H
 
 #define KOSSL KOpenSSLProxy
 class KOpenSSLProxyPrivate;
 
 #include <ksslconfig.h>
 
 #if KSSL_HAVE_SSL
 #define crypt _openssl_crypt
 #include <openssl/ssl.h>
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>
 #include <openssl/pem.h>
 #include <openssl/bio.h>
 #include <openssl/rand.h>
 #include <openssl/asn1.h>
 #include <openssl/pkcs7.h>
 #include <openssl/pkcs12.h>
 #include <openssl/evp.h>
 #include <openssl/stack.h>
 #include <openssl/bn.h>
 #undef crypt
 #if OPENSSL_VERSION_NUMBER >= 0x10000000L
 #define STACK _STACK
 #define OSSL_SKVALUE_RTYPE void
 #define OSSL_MORECONST const
 #else
 #define OSSL_SKVALUE_RTYPE char
 #define OSSL_MORECONST
 #endif
 #endif
 
 /**
  * Dynamically load and wrap OpenSSL.
  *
  * @author George Staikos <staikos@kde.org>
  * @see KSSL
  * @short KDE OpenSSL Wrapper
  * @internal
  */
 class KOpenSSLProxy
 {
 public:
 
     /**
      * Return an instance of class KOpenSSLProxy *
      * You cannot delete this object.  It is a singleton class.
      */
     static KOpenSSLProxy *self();
 
     /**
      *   Return true of libcrypto was found and loaded
      */
     bool hasLibCrypto() const;
 
     /**
      *   Return true of libssl was found and loaded
      */
     bool hasLibSSL() const;
 
     /**
      *   Destroy the class and start over - don't use this unless you know
      *   what you are doing.
      */
     void destroy();
 
     // Here are the symbols that we need.
 #if KSSL_HAVE_SSL
 
     /*
      *   SSL_connect - initiate the TLS/SSL handshake with an TLS/SSL server
      */
     int SSL_connect(SSL *ssl);
 
     /*
      *   SSL_accept - initiate the TLS/SSL handshake with an TLS/SSL server
      */
     int SSL_accept(SSL *ssl);
 
     /*
      *   SSL_get_error - get the error code
      */
     int SSL_get_error(SSL *ssl, int rc);
 
     /*
      *   SSL_read - read bytes from a TLS/SSL connection.
      */
     int SSL_read(SSL *ssl, void *buf, int num);
 
     /*
      *   SSL_write - write bytes to a TLS/SSL connection.
      */
     int SSL_write(SSL *ssl, const void *buf, int num);
 
     /*
      *   SSL_new - create a new SSL structure for a connection
      */
     SSL *SSL_new(SSL_CTX *ctx);
 
     /*
      *   SSL_free - free an allocated SSL structure
      */
     void SSL_free(SSL *ssl);
 
     /*
      *   SSL_shutdown - shutdown an allocated SSL connection
      */
     int SSL_shutdown(SSL *ssl);
 
     /*
      *   SSL_CTX_new - create a new SSL_CTX object as framework for TLS/SSL enabled functions
      */
     SSL_CTX *SSL_CTX_new(SSL_METHOD *method);
 
     /*
      *   SSL_CTX_free - free an allocated SSL_CTX object
      */
     void SSL_CTX_free(SSL_CTX *ctx);
 
     /*
      *   SSL_set_fd - connect the SSL object with a file descriptor
      */
     int SSL_set_fd(SSL *ssl, int fd);
 
     /*
      *   SSL_pending - obtain number of readable bytes buffered in an SSL object
      */
     int SSL_pending(SSL *ssl);
 
     /*
      *   SSL_peek - obtain bytes buffered in an SSL object
      */
     int SSL_peek(SSL *ssl, void *buf, int num);
 
     /*
      *   SSL_CTX_set_cipher_list - choose list of available SSL_CIPHERs
      */
     int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str);
 
     /*
      *   SSL_CTX_set_verify - set peer certificate verification parameters
      */
     void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
                             int (*verify_callback)(int, X509_STORE_CTX *));
 
     /*
      *   SSL_use_certificate - load certificate
      */
     int SSL_use_certificate(SSL *ssl, X509 *x);
 
     /*
      *   SSL_get_current_cipher - get SSL_CIPHER of a connection
      */
     SSL_CIPHER *SSL_get_current_cipher(SSL *ssl);
 
     /*
      *   SSL_set_options - manipulate SSL engine options
      *   Note: These are all mapped to SSL_ctrl so call them as the comment
      *         specifies but know that they use SSL_ctrl.  They are #define
      *         so they will map to the one in this class if called as a
      *         member function of this class.
      */
     /* long SSL_set_options(SSL *ssl, long options); */
     /*   Returns 0 if not reused, 1 if session id is reused */
     /*   int SSL_session_reused(SSL *ssl); */
     long    SSL_ctrl(SSL *ssl, int cmd, long larg, char *parg);
 
     /*
      *   RAND_egd - set the path to the EGD
      */
     int RAND_egd(const char *path);
 
     /*
      *   RAND_file_name
      */
     const char *RAND_file_name(char *buf, size_t num);
 
     /*
      *   RAND_load_file
      */
     int RAND_load_file(const char *filename, long max_bytes);
 
     /*
      *   RAND_write_file
      */
     int RAND_write_file(const char *filename);
 
     /*
      *   TLSv1_client_method - return a TLSv1 client method object
      */
     SSL_METHOD *TLSv1_client_method();
 
     /*
      *   SSLv23_client_method - return a SSLv23 client method object
      */
     SSL_METHOD *SSLv23_client_method();
 
     /*
      *   SSL_get_peer_certificate - return the peer's certificate
      */
     X509 *SSL_get_peer_certificate(SSL *s);
 
     /*
      *   SSL_get_peer_cert_chain - get the peer's certificate chain
      */
     STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s);
 
     /*
      *   SSL_CIPHER_get_bits - get the number of bits in this cipher
      */
     int SSL_CIPHER_get_bits(SSL_CIPHER *c, int *alg_bits);
 
     /*
      *   SSL_CIPHER_get_version - get the version of this cipher
      */
     char *SSL_CIPHER_get_version(SSL_CIPHER *c);
 
     /*
      *   SSL_CIPHER_get_name - get the name of this cipher
      */
     const char *SSL_CIPHER_get_name(SSL_CIPHER *c);
 
     /*
      *   SSL_CIPHER_description - get the description of this cipher
      */
     char *SSL_CIPHER_description(SSL_CIPHER *, char *buf, int size);
 
     /*
      *   SSL_CTX_use_PrivateKey - set the private key for the session.
      *                          - for use with client certificates
      */
     int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey);
 
     /*
      *   SSL_CTX_use_certificate - set the client certificate for the session.
      */
     int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x);
 
     /*
      *   d2i_X509 - Convert a text representation of X509 to an X509 object
      */
     X509 *d2i_X509(X509 **a, unsigned char **pp, long length);
 
     /*
      *   i2d_X509 - Convert an X509 object into a text representation
      */
     int i2d_X509(X509 *a, unsigned char **pp);
 
     /*
      *   X509_cmp - compare two X509 objects
      */
     int X509_cmp(X509 *a, X509 *b);
 
     /*
      *   X509_dup - duplicate an X509 object
      */
     X509 *X509_dup(X509 *x509);
 
     /*
      *   X509_getm_notBefore - get validity start
      */
     ASN1_TIME *X509_getm_notBefore(const X509 *x);
 
     /*
      *   X509_getm_notAfter - get validity end
      */
     ASN1_TIME *X509_getm_notAfter(const X509 *x);
 
     /*
      *   X509_STORE_CTX_new - create an X509 store context
      */
     X509_STORE_CTX *X509_STORE_CTX_new(void);
 
     /*
      *   X509_STORE_CTX_free - free up an X509 store context
      */
     void X509_STORE_CTX_free(X509_STORE_CTX *v);
 
     /*
      *   X509_STORE_CTX_set_chain - set the certificate chain
      */
     void X509_STORE_CTX_set_chain(X509_STORE_CTX *v, STACK_OF(X509)* x);
 
     /*
      *   X509_STORE_CTX_set_purpose - set the purpose of the certificate
      */
     void X509_STORE_CTX_set_purpose(X509_STORE_CTX *v, int purpose);
 
     /**
      *   X509_STORE_CTX_get_current_cert - get the current certificate
      */
     X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *v);
 
     /**
      *   X509_STORE_CTX_set_error - set certificate error
      */
     void X509_STORE_CTX_set_error(X509_STORE_CTX *v, int error);
 
     /**
      *   X509_STORE_CTX_get_error - get certificate error
      */
     int X509_STORE_CTX_get_error(X509_STORE_CTX *v);
 
     /*
      *   X509_verify_cert - verify the certificate
      */
     int X509_verify_cert(X509_STORE_CTX *v);
 
     /*
      *   X509_STORE_new - create an X509 store
      */
     X509_STORE *X509_STORE_new(void);
 
     /*
      *   X509_STORE_free - free up an X509 store
      */
     void X509_STORE_free(X509_STORE *v);
 
     /*
      *   X509_STORE_set_verify_cb - set verify callback
      */
     void X509_STORE_set_verify_cb(X509_STORE *v, int (*verify_cb)(int, X509_STORE_CTX *));
 
     /*
      *   X509_free - free up an X509
      */
     void X509_free(X509 *v);
 
     /*
      *   X509_NAME_oneline - return the X509 data in a string
      */
     char *X509_NAME_oneline(X509_NAME *a, char *buf, int size);
 
     /*
      *   X509_get_subject_name - return the X509_NAME for the subject field
      */
     X509_NAME *X509_get_subject_name(X509 *a);
 
     /*
      *   X509_get_issuer_name - return the X509_NAME for the issuer field
      */
     X509_NAME *X509_get_issuer_name(X509 *a);
 
     /*
      *   X509_get0_signature - return X509 signature and signature algorithm
      */
     void X509_get0_signature(const ASN1_BIT_STRING **psig, const X509_ALGOR **palg, const X509 *x);
 
     /*
      *   X509_STORE_add_lookup - add a lookup file/method to an X509 store
      */
     X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m);
 
     /*
      *   X509_LOOKUP_file - Definition of the LOOKUP_file method
      */
     X509_LOOKUP_METHOD *X509_LOOKUP_file(void);
 
     /*
      *   X509_LOOKUP_free - Free an X509_LOOKUP
      */
     void X509_LOOKUP_free(X509_LOOKUP *x);
 
     /*
      *   X509_LOOKUP_ctrl - This is not normally called directly (use macros)
      */
     int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl, char **ret);
 
     /*
      *   X509_STORE_CTX_init - initialize an X509 STORE context
      */
     void X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509, STACK_OF(X509) *chain);
 
     /*
      *   CRYPTO_free - free up an internally allocated object
      */
 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
     void CRYPTO_free(void *x);
 #else
     void CRYPTO_free(void *x, const char *file, int line);
 #endif
 
     /*
      *   BIO_new - create new BIO
      */
     BIO *BIO_new(BIO_METHOD *type);
 
     /*
      *   BIO methods - only one defined here yet
      */
     BIO_METHOD *BIO_s_mem(void);
 
     /*
      *   BIO_new_fp - nastiness called BIO - used to create BIO* from FILE*
      */
     BIO *BIO_new_fp(FILE *stream, int close_flag);
 
     /*
      *   BIO_new_mem_buf - read only BIO from memory region
      */
     BIO *BIO_new_mem_buf(void *buf, int len);
 
     /*
      *   BIO_free - nastiness called BIO - used to destroy BIO*
      */
     int BIO_free(BIO *a);
 
     /*
      *   BIO_ctrl - BIO control method
      */
     long BIO_ctrl(BIO *bp, int cmd, long larg, void *parg);
 
     /*
      *   BIO_write - equivalent to ::write for BIO
      */
     int BIO_write(BIO *b, const void *data, int len);
 
     /*
      *   PEM_write_bio_X509 - write a PEM encoded cert to a BIO*
      */
     int PEM_write_bio_X509(BIO *bp, X509 *x);
 
     /*
      *   ASN1_item_i2d_fp - used for netscape output
      */
     int ASN1_item_i2d_fp(FILE *out, unsigned char *x);
 
     /*
      *   ASN1_d2i_fp - read an X509 from a DER encoded file (buf can be NULL)
      */
     X509 *X509_d2i_fp(FILE *out, X509 **buf);
 
     /*
      *   X509_print - print the text form of an X509
      */
     int X509_print(FILE *fp, X509 *x);
 
     /*
      *   Read a PKCS#12 cert from fp
      */
     PKCS12 *d2i_PKCS12_fp(FILE *fp, PKCS12 **p12);
 
     /*
      *   Change the password on a PKCS#12 cert
      */
     int PKCS12_newpass(PKCS12 *p12, char *oldpass, char *newpass);
 
     /*
      *   Write a PKCS#12 to mem
      */
     int i2d_PKCS12(PKCS12 *p12, unsigned char **p);
 
     /*
      *   Write a PKCS#12 to FILE*
      */
     int i2d_PKCS12_fp(FILE *fp, PKCS12 *p12);
 
     /*
      *   Create a new PKCS#12 object
      */
     PKCS12 *PKCS12_new(void);
 
     /*
      *   Destroy that PKCS#12 that you created!
      */
     void PKCS12_free(PKCS12 *a);
 
     /*
      *   Parse the PKCS#12
      */
     int PKCS12_parse(PKCS12 *p12, const char *pass, EVP_PKEY **pkey,
                      X509 **cert, STACK_OF(X509) **ca);
 
     /*
      *   Free the Private Key
      */
     void EVP_PKEY_free(EVP_PKEY *x);
 
     /*
      *   Pop off the stack
      */
     char *OPENSSL_sk_pop(STACK *s);
 
     /*
      *   Free the stack
      */
     void OPENSSL_sk_free(STACK *s);
 
 #if OPENSSL_VERSION_NUMBER >= 0x10000000L
     void OPENSSL_sk_free(void *s)
     {
         return OPENSSL_sk_free(reinterpret_cast<STACK *>(s));
     }
 #endif
 
     /*
      *  Number of elements in the stack
      */
     int OPENSSL_sk_num(STACK *s);
 
     /*
      *  Value of element n in the stack
      */
     char *OPENSSL_sk_value(STACK *s, int n);
 
 #if OPENSSL_VERSION_NUMBER >= 0x10000000L
     char *OPENSSL_sk_value(void *s, int n)
     {
         return OPENSSL_sk_value(reinterpret_cast<STACK *>(s), n);
     }
 #endif
 
     /*
      *  Create a new stack
      */
     STACK *OPENSSL_sk_new(int (*cmp)());
 
     /*
      *  Add an element to the stack
      */
     int OPENSSL_sk_push(STACK *s, char *d);
 
 #if OPENSSL_VERSION_NUMBER >= 0x10000000L
     int OPENSSL_sk_push(void *s, void *d)
     {
         return OPENSSL_sk_push(reinterpret_cast<STACK *>(s), reinterpret_cast<char *>(d));
     }
 #endif
 
     /*
      *  Duplicate the stack
      */
     STACK *OPENSSL_sk_dup(STACK *s);
 
     /*
      *  Convert an ASN1_INTEGER to its text form
      */
     char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *meth, ASN1_INTEGER *aint);
 
     /*
      *  Get the certificate's serial number
      */
     ASN1_INTEGER *X509_get_serialNumber(X509 *x);
 
     /*
      *  Get the certificate's public key
      */
     EVP_PKEY *X509_get_pubkey(X509 *x);
 
     /*
      *  Convert the public key to a decimal form
      */
     int i2d_PublicKey(EVP_PKEY *a, unsigned char **pp);
 
     /*
      *  Check the private key of a PKCS bundle against the X509
      */
     int X509_check_private_key(X509 *x, EVP_PKEY *p);
 
     /*
      *  Convert a BIGNUM to a hex string
      */
     char *BN_bn2hex(const BIGNUM *a);
 
     /*
      *  Compute the digest of an X.509
      */
     int X509_digest(const X509 *x, const EVP_MD *t, unsigned char *md, unsigned int *len);
 
     /*
      *  EVP_md5
      */
     EVP_MD *EVP_md5();
 
     /*
      *  ASN1_INTEGER free
      */
     void ASN1_INTEGER_free(ASN1_INTEGER *x);
 
     /*
      *  ASN1_STRING_data
      */
     unsigned char *ASN1_STRING_data(ASN1_STRING *x);
 
     /*
      *  ASN1_STRING_length
      */
     int ASN1_STRING_length(ASN1_STRING *x);
 
     /*
      *
      */
     int OBJ_obj2nid(ASN1_OBJECT *o);
 
     /*
      *
      */
     const char *OBJ_nid2ln(int n);
 
     /*
      * get the number of extensions
      */
     int X509_get_ext_count(X509 *x);
 
     /*
      *
      */
     int X509_get_ext_by_NID(X509 *x, int nid, int lastpos);
 
     /*
      *
      */
     int X509_get_ext_by_OBJ(X509 *x, ASN1_OBJECT *obj, int lastpos);
 
     /*
      *
      */
     X509_EXTENSION *X509_get_ext(X509 *x, int loc);
 
     /*
      *
      */
     X509_EXTENSION *X509_delete_ext(X509 *x, int loc);
 
     /*
      *
      */
     int X509_add_ext(X509 *x, X509_EXTENSION *ex, int loc);
 
     /*
      *
      */
     void *X509_get_ext_d2i(X509 *x, int nid, int *crit, int *idx);
 
     /*
      *
      */
     char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, ASN1_OCTET_STRING *ia5);
 
     /*
      *
      */
     int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n);
 
     /*
      *
      */
     PKCS7 *PKCS7_new(void);
 
     /*
      *
      */
     void PKCS7_free(PKCS7 *a);
 
     /*
      *
      */
     void PKCS7_content_free(PKCS7 *a);
 
     /*
      *
      */
     int i2d_PKCS7(PKCS7 *a, unsigned char **pp);
 
     /*
      *
      */
     PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length);
 
     /*
      *
      */
     int i2d_PKCS7_fp(FILE *fp, PKCS7 *p7);
 
     /*
      *
      */
     PKCS7 *d2i_PKCS7_fp(FILE *fp, PKCS7 **p7);
 
     /*
      *
      */
     int i2d_PKCS7_bio(BIO *bp, PKCS7 *p7);
 
     /*
      *
      */
     PKCS7 *d2i_PKCS7_bio(BIO *bp, PKCS7 **p7);
 
     /*
      *
      */
     PKCS7 *PKCS7_dup(PKCS7 *p7);
 
     /*
      *  Create a PKCS7 signature / signed message
      */
     PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
                       BIO *data, int flags);
 
     /*
      *  Verify a PKCS7 signature.
      */
     int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
                      BIO *indata, BIO *out, int flags);
 
     /*
      *  Get signers of a verified PKCS7 signature
      */
     STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags);
 
     /*
      *  PKCS7 encrypt message
      */
     PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, EVP_CIPHER *cipher,
                          int flags);
 
     /*
      *  decrypt PKCS7 message
      */
     int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags);
 
     /*
      * Load a CA list file.
      */
     STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);
 
     /*
      * Load a file of PEM encoded objects.
      */
     STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
                                             pem_password_cb *cb, void *u);
 
     /*
      * Get the number of purposes available
      */
     int X509_PURPOSE_get_count();
 
     /*
      * Get the ID of a purpose
      */
     int X509_PURPOSE_get_id(X509_PURPOSE *);
 
     /*
      * Check the existence of purpose id "id" in x.  for CA, set ca = 1, else 0
      */
     int X509_check_purpose(X509 *x, int id, int ca);
 
     /*
      * Get the purpose with index #idx
      */
     X509_PURPOSE *X509_PURPOSE_get0(int idx);
 
     /*
      * Create a new Private KEY
      */
     EVP_PKEY *EVP_PKEY_new();
 
     /*
      * Assign a private key
      */
     int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key);
 
     /*
      * Get key type
      */
     int EVP_PKEY_base_id(EVP_PKEY *pkey);
 
     RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey);
     void RSA_get0_key(RSA *rsa, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d);
     DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey);
     void DSA_get0_pqg(DSA *dsa, const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
     void DSA_get0_key(DSA *dsa, const BIGNUM **pub_key, const BIGNUM **priv_key);
 
     /*
      * Generate a RSA key
      */
     RSA *RSA_generate_key(int bits, unsigned long e, void
                           (*callback)(int, int, void *), void *cb_arg);
 
     /*
      * Create/destroy a certificate request
      */
     X509_REQ *X509_REQ_new();
     void X509_REQ_free(X509_REQ *a);
 
     /*
      * Set the public key in the REQ object
      */
     int X509_REQ_set_pubkey(X509_REQ *x, EVP_PKEY *pkey);
 
     /* for testing */
     int i2d_X509_REQ_fp(FILE *fp, X509_REQ *x);
 
     /* SMime support */
     STACK *X509_get1_email(X509 *x);
     void X509_email_free(STACK *sk);
 
     /* Ciphers needed for SMime */
     EVP_CIPHER *EVP_des_ede3_cbc();
     EVP_CIPHER *EVP_des_cbc();
     EVP_CIPHER *EVP_rc2_cbc();
     EVP_CIPHER *EVP_rc2_64_cbc();
     EVP_CIPHER *EVP_rc2_40_cbc();
 
     /* clear the current error  - use this often*/
     void ERR_clear_error();
 
     /* retrieve the latest error */
     unsigned long ERR_get_error();
 
     /* Print the errors to this stream */
     void ERR_print_errors_fp(FILE *fp);
 
     /* Get a pointer to the SSL session id (reference counted) */
     SSL_SESSION *SSL_get1_session(SSL *ssl);
 
     /* Frees a pointer to the SSL session id (reference decremented if needed) */
     void SSL_SESSION_free(SSL_SESSION *session);
 
     /* Set the SSL session to reuse. */
     int SSL_set_session(SSL *ssl, SSL_SESSION *session);
 
     /* Decode ASN.1 to SSL_SESSION */
     SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp, long length);
     /* Encode SSL_SESSION to ASN.1 */
     int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp);
 
     /* Write privatekey to FILE stream */
     int i2d_PrivateKey_fp(FILE *, EVP_PKEY *);
 
     /* Write PKCS#8privatekey to FILE stream */
     int i2d_PKCS8PrivateKey_fp(FILE *, EVP_PKEY *, const EVP_CIPHER *, char *, int, pem_password_cb *, void *);
 
     /* Free RSA structure */
     void RSA_free(RSA *);
 
     /* Get a blowfish CBC pointer */
     EVP_CIPHER *EVP_bf_cbc();
 
     /* Sign a CSR */
     int X509_REQ_sign(X509_REQ *, EVP_PKEY *, const EVP_MD *);
 
     /* add a name entry */
     int X509_NAME_add_entry_by_txt(X509_NAME *, char *, int, unsigned char *, int, int, int);
 
     /* Create a name */
     X509_NAME *X509_NAME_new();
 
     /* Set the subject */
     int X509_REQ_set_subject_name(X509_REQ *, X509_NAME *);
 
     /* get list of available SSL_CIPHER's sorted by preference */
     STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *ssl);
 
 #endif
 
 private:
     friend class KOpenSSLProxyPrivate;
     KOpenSSLProxy();
     ~KOpenSSLProxy();
     KOpenSSLProxyPrivate *const d;
 };
 
 #endif