Import of old SSLeay release: SSLeay 0.8.1b

[thirdparty/openssl.git] / ssl / ssl_lib.c

/* ssl/ssl_lib.c */
/* Copyright (C) 1995-1997 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.]
 */

#include <stdio.h>
#include "objects.h"
#include "lhash.h"
#include "ssl_locl.h"

#ifndef NOPROTO
static unsigned long conn_hash(SSL_SESSION *a);
#else
static unsigned long conn_hash();
#endif

char *SSL_version_str="SSLeay 0.8.1b 29-Jun-1998";

void SSL_clear(s)
SSL *s;
        {
        int state;

        if (s->method == NULL) return;

        s->error=0;
        s->hit=0;

        /* This is set if we are doing dynamic renegotiation so keep
         * the old cipher.  It is sort of a SSL_clear_lite :-) */
        if (s->new_session) return;

        state=s->state; /* Keep to check if we throw away the session-id */
        s->type=0;

        s->version=s->method->version;
        s->rwstate=SSL_NOTHING;
        s->state=SSL_ST_BEFORE;
        s->rstate=SSL_ST_READ_HEADER;
        s->read_ahead=s->ctx->default_read_ahead;

/*      s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN); */

        if (s->init_buf != NULL)
                {
                BUF_MEM_free(s->init_buf);
                s->init_buf=NULL;
                }

        ssl_clear_cipher_ctx(s);

        if (ssl_clear_bad_session(s))
                {
                SSL_SESSION_free(s->session);
                s->session=NULL;
                }

        s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
        s->first_packet=0;

        s->method->ssl_clear(s);
        }

/* Used to change an SSL_CTXs default SSL method type */
int SSL_CTX_set_ssl_version(ctx,meth)
SSL_CTX *ctx;
SSL_METHOD *meth;
        {
        STACK *sk;

        ctx->method=meth;

        sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
                &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
        if ((sk == NULL) || (sk_num(sk) <= 0))
                {
                SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
                return(0);
                }
        return(1);
        }

SSL *SSL_new(ctx)
SSL_CTX *ctx;
        {
        SSL *s;

        if (ctx == NULL)
                {
                SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
                return(NULL);
                }
        if (ctx->method == NULL)
                {
                SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
                return(NULL);
                }

        s=(SSL *)Malloc(sizeof(SSL));
        if (s == NULL) goto err;
        memset(s,0,sizeof(SSL));

        if (ctx->default_cert != NULL)
                {
                CRYPTO_add(&ctx->default_cert->references,1,
                        CRYPTO_LOCK_SSL_CERT);
                s->cert=ctx->default_cert;
                }
        else
                s->cert=NULL;
        s->verify_mode=ctx->default_verify_mode;
        s->verify_callback=ctx->default_verify_callback;
        CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
        s->ctx=ctx;

        s->verify_result=X509_V_OK;

        s->method=ctx->method;

        if (!s->method->ssl_new(s))
                {
                SSL_CTX_free(ctx);
                Free(s);
                goto err;
                }

        s->quiet_shutdown=ctx->quiet_shutdown;
        SSL_clear(s);
        return(s);
err:
        SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
        return(NULL);
        }

void SSL_free(s)
SSL *s;
        {
        if (s->bbio != NULL)
                {
                /* If the buffering BIO is in place, pop it off */
                if (s->bbio == s->wbio)
                        {
                        s->wbio=BIO_pop(s->wbio);
                        }
                BIO_free(s->bbio);
                }
        if (s->rbio != NULL)
                BIO_free_all(s->rbio);
        if ((s->wbio != NULL) && (s->wbio != s->rbio))
                BIO_free_all(s->wbio);

        if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);

        /* add extra stuff */
        if (s->cipher_list != NULL) sk_free(s->cipher_list);
        if (s->cipher_list_by_id != NULL) sk_free(s->cipher_list_by_id);

        /* Make the next call work :-) */
        if (s->session != NULL)
                {
                ssl_clear_bad_session(s);
                SSL_SESSION_free(s->session);
                }

        ssl_clear_cipher_ctx(s);

        if (s->cert != NULL) ssl_cert_free(s->cert);
        /* Free up if allocated */

        if (s->ctx) SSL_CTX_free(s->ctx);

        if (s->client_CA != NULL)
                sk_pop_free(s->client_CA,X509_NAME_free);

        if (s->method != NULL) s->method->ssl_free(s);

        Free((char *)s);
        }

void SSL_set_bio(s, rbio,wbio)
SSL *s;
BIO *rbio;
BIO *wbio;
        {
        /* If the output buffering BIO is still in place, remove it
         */
        if (s->bbio != NULL)
                {
                if (s->wbio == s->bbio)
                        {
                        s->wbio=s->wbio->next_bio;
                        s->bbio->next_bio=NULL;
                        }
                }
        if ((s->rbio != NULL) && (s->rbio != rbio))
                BIO_free_all(s->rbio);
        if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
                BIO_free_all(s->wbio);
        s->rbio=rbio;
        s->wbio=wbio;
        }

BIO *SSL_get_rbio(s)
SSL *s;
        { return(s->rbio); }

BIO *SSL_get_wbio(s)
SSL *s;
        { return(s->wbio); }

int SSL_get_fd(s)
SSL *s;
        {
        int ret= -1;
        BIO *b,*r;

        b=SSL_get_rbio(s);
        r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
        if (r != NULL)
                BIO_get_fd(r,&ret);
        return(ret);
        }

#ifndef NO_SOCK
int SSL_set_fd(s, fd)
SSL *s;
int fd;
        {
        int ret=0;
        BIO *bio=NULL;

        bio=BIO_new(BIO_s_socket());

        if (bio == NULL)
                {
                SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
                goto err;
                }
        BIO_set_fd(bio,fd,BIO_NOCLOSE);
        SSL_set_bio(s,bio,bio);
        ret=1;
err:
        return(ret);
        }

int SSL_set_wfd(s, fd)
SSL *s;
int fd;
        {
        int ret=0;
        BIO *bio=NULL;

        bio=BIO_new(BIO_s_socket());

        if (bio == NULL)
                { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
        BIO_set_fd(bio,fd,BIO_NOCLOSE);
        SSL_set_bio(s,SSL_get_rbio(s),bio);
        ret=1;
err:
        return(ret);
        }

int SSL_set_rfd(s, fd)
SSL *s;
int fd;
        {
        int ret=0;
        BIO *bio=NULL;

        bio=BIO_new(BIO_s_socket());

        if (bio == NULL)
                {
                SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
                goto err;
                }
        BIO_set_fd(bio,fd,BIO_NOCLOSE);
        SSL_set_bio(s,bio,SSL_get_wbio(s));
        ret=1;
err:
        return(ret);
        }
#endif

int SSL_get_verify_mode(s)
SSL *s;
        {
        return(s->verify_mode);
        }

int (*SSL_get_verify_callback(s))()
SSL *s;
        {
        return(s->verify_callback);
        }

int SSL_CTX_get_verify_mode(ctx)
SSL_CTX *ctx;
        {
        return(ctx->default_verify_mode);
        }

int (*SSL_CTX_get_verify_callback(ctx))()
SSL_CTX *ctx;
        {
        return(ctx->default_verify_callback);
        }

void SSL_set_verify(s, mode, callback)
SSL *s;
int mode;
int (*callback)();
        {
        s->verify_mode=mode;
        if (callback != NULL)
                s->verify_callback=callback;
        }

void SSL_set_read_ahead(s, yes)
SSL *s;
int yes;
        {
        s->read_ahead=yes;
        }

int SSL_get_read_ahead(s)
SSL *s;
        {
        return(s->read_ahead);
        }

int SSL_pending(s)
SSL *s;
        {
        return(s->method->ssl_pending(s));
        }

X509 *SSL_get_peer_certificate(s)
SSL *s;
        {
        X509 *r;
        
        if ((s == NULL) || (s->session == NULL))
                r=NULL;
        else
                r=s->session->peer;

        if (r == NULL) return(r);

        CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);

        return(r);
        }

STACK *SSL_get_peer_cert_chain(s)
SSL *s;
        {
        STACK *r;
        
        if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
                r=NULL;
        else
                r=s->session->cert->cert_chain;

        return(r);
        }

/* Now in theory, since the calling process own 't' it should be safe to
 * modify.  We need to be able to read f without being hassled */
void SSL_copy_session_id(t,f)
SSL *t,*f;
        {
        CERT *tmp;

        /* Do we need to to SSL locking? */
        SSL_set_session(t,SSL_get_session(f));

        /* what if we are setup as SSLv2 but want to talk SSLv3 or
         * vice-versa */
        if (t->method != f->method)
                {
                t->method->ssl_free(t); /* cleanup current */
                t->method=f->method;    /* change method */
                t->method->ssl_new(t);  /* setup new */
                }

        tmp=t->cert;
        if (f->cert != NULL)
                {
                CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
                t->cert=f->cert;
                }
        else
                t->cert=NULL;
        if (tmp != NULL) ssl_cert_free(tmp);
        }

int SSL_CTX_check_private_key(ctx)
SSL_CTX *ctx;
        {
        if (    (ctx == NULL) ||
                (ctx->default_cert == NULL) ||
                (ctx->default_cert->key->x509 == NULL))
                {
                SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
                return(0);
                }
        if      (ctx->default_cert->key->privatekey == NULL)
                {
                SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
                return(0);
                }
        return(X509_check_private_key(ctx->default_cert->key->x509, ctx->default_cert->key->privatekey));
        }

int SSL_check_private_key(ssl)
SSL *ssl;
        {
        if (ssl == NULL)
                {
                SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
                return(0);
                }
        if (ssl->cert == NULL)
                return(SSL_CTX_check_private_key(ssl->ctx));
        if (ssl->cert->key->x509 == NULL)
                {
                SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
                return(0);
                }
        if (ssl->cert->key->privatekey == NULL)
                {
                SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
                return(0);
                }
        return(X509_check_private_key(ssl->cert->key->x509,
                ssl->cert->key->privatekey));
        }

int SSL_accept(s)
SSL *s;
        {
        return(s->method->ssl_accept(s));
        }

int SSL_connect(s)
SSL *s;
        {
        return(s->method->ssl_connect(s));
        }

long SSL_get_default_timeout(s)
SSL *s;
        {
        return(s->method->get_timeout());
        }

int SSL_read(s,buf,num)
SSL *s;
char *buf;
int num;
        {
        if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
                {
                s->rwstate=SSL_NOTHING;
                return(0);
                }
        return(s->method->ssl_read(s,buf,num));
        }

int SSL_peek(s,buf,num)
SSL *s;
char *buf;
int num;
        {
        if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
                {
                return(0);
                }
        return(s->method->ssl_peek(s,buf,num));
        }

int SSL_write(s,buf,num)
SSL *s;
char *buf;
int num;
        {
        if (s->shutdown & SSL_SENT_SHUTDOWN)
                {
                s->rwstate=SSL_NOTHING;
                SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
                return(-1);
                }
        return(s->method->ssl_write(s,buf,num));
        }

int SSL_shutdown(s)
SSL *s;
        {
        if ((s != NULL) && !SSL_in_init(s))
                return(s->method->ssl_shutdown(s));
        else
                return(1);
        }

int SSL_renegotiate(s)
SSL *s;
        {
        return(s->method->ssl_renegotiate(s));
        }

long SSL_ctrl(s,cmd,larg,parg)
SSL *s;
int cmd;
long larg;
char *parg;
        {
        return(s->method->ssl_ctrl(s,cmd,larg,parg));
        }

long SSL_CTX_ctrl(ctx,cmd,larg,parg)
SSL_CTX *ctx;
int cmd;
long larg;
char *parg;
        {
        return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
        }

int ssl_cipher_id_cmp(a,b)
SSL_CIPHER *a,*b;
        {
        long l;

        l=a->id-b->id;
        if (l == 0L)
                return(0);
        else
                return((l > 0)?1:-1);
        }

int ssl_cipher_ptr_id_cmp(ap,bp)
SSL_CIPHER **ap,**bp;
        {
        long l;

        l=(*ap)->id-(*bp)->id;
        if (l == 0L)
                return(0);
        else
                return((l > 0)?1:-1);
        }

/* return a STACK of the ciphers available for the SSL and in order of
 * preference */
STACK *SSL_get_ciphers(s)
SSL *s;
        {
        if ((s != NULL) && (s->cipher_list != NULL))
                {
                return(s->cipher_list);
                }
        else if ((s != NULL) && (s->ctx != NULL) &&
                (s->ctx->cipher_list != NULL))
                {
                return(s->ctx->cipher_list);
                }
        return(NULL);
        }

/* return a STACK of the ciphers available for the SSL and in order of
 * algorithm id */
STACK *ssl_get_ciphers_by_id(s)
SSL *s;
        {
        if ((s != NULL) && (s->cipher_list_by_id != NULL))
                {
                return(s->cipher_list_by_id);
                }
        else if ((s != NULL) && (s->ctx != NULL) &&
                (s->ctx->cipher_list_by_id != NULL))
                {
                return(s->ctx->cipher_list_by_id);
                }
        return(NULL);
        }

/* The old interface to get the same thing as SSL_get_ciphers() */
char *SSL_get_cipher_list(s,n)
SSL *s;
int n;
        {
        SSL_CIPHER *c;
        STACK *sk;

        if (s == NULL) return(NULL);
        sk=SSL_get_ciphers(s);
        if ((sk == NULL) || (sk_num(sk) <= n))
                return(NULL);
        c=(SSL_CIPHER *)sk_value(sk,n);
        if (c == NULL) return(NULL);
        return(c->name);
        }

/* specify the ciphers to be used by defaut by the SSL_CTX */
int SSL_CTX_set_cipher_list(ctx,str)
SSL_CTX *ctx;
char *str;
        {
        STACK *sk;
        
        sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
                &ctx->cipher_list_by_id,str);
/* XXXX */
        return((sk == NULL)?0:1);
        }

/* specify the ciphers to be used by the SSL */
int SSL_set_cipher_list(s, str)
SSL *s;
char *str;
        {
        STACK *sk;
        
        sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
                &s->cipher_list_by_id,str);
/* XXXX */
        return((sk == NULL)?0:1);
        }

/* works well for SSLv2, not so good for SSLv3 */
char *SSL_get_shared_ciphers(s,buf,len)
SSL *s;
char *buf;
int len;
        {
        char *p,*cp;
        STACK *sk;
        SSL_CIPHER *c;
        int i;

        if ((s->session == NULL) || (s->session->ciphers == NULL) ||
                (len < 2))
                return(NULL);

        p=buf;
        sk=s->session->ciphers;
        len--;
        for (i=0; i<sk_num(sk); i++)
                {
                c=(SSL_CIPHER *)sk_value(sk,i);
                for (cp=c->name; *cp; )
                        {
                        if (--len == 0)
                                {
                                *p='\0';
                                return(buf);
                                }
                        else
                                *(p++)= *(cp++);
                        }
                *(p++)=':';
                }
        p[-1]='\0';
        return(buf);
        }

int ssl_cipher_list_to_bytes(s,sk,p)
SSL *s;
STACK *sk;
unsigned char *p;
        {
        int i,j=0;
        SSL_CIPHER *c;
        unsigned char *q;

        if (sk == NULL) return(0);
        q=p;

        for (i=0; i<sk_num(sk); i++)
                {
                c=(SSL_CIPHER *)sk_value(sk,i);
                j=ssl_put_cipher_by_char(s,c,p);
                p+=j;
                }
        return(p-q);
        }

STACK *ssl_bytes_to_cipher_list(s,p,num,skp)
SSL *s;
unsigned char *p;
int num;
STACK **skp;
        {
        SSL_CIPHER *c;
        STACK *sk;
        int i,n;

        n=ssl_put_cipher_by_char(s,NULL,NULL);
        if ((num%n) != 0)
                {
                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
                return(NULL);
                }
        if ((skp == NULL) || (*skp == NULL))
                sk=sk_new(NULL); /* change perhaps later */
        else
                {
                sk= *skp;
                sk_zero(sk);
                }

        for (i=0; i<num; i+=n)
                {
                c=ssl_get_cipher_by_char(s,p);
                p+=n;
                if (c != NULL)
                        {
                        if (!sk_push(sk,(char *)c))
                                {
                                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
                                goto err;
                                }
                        }
                }

        if (skp != NULL)
                *skp=sk;
        return(sk);
err:
        if ((skp == NULL) || (*skp == NULL))
                sk_free(sk);
        return(NULL);
        }

static unsigned long conn_hash(a)
SSL_SESSION *a;
        {
        unsigned long l;

        l=      (a->session_id[0]     )|(a->session_id[1]<< 8L)|
                (a->session_id[1]<<16L)|(a->session_id[2]<<24L);
        return(l);
        }

static int session_cmp(a, b)
SSL_SESSION *a;
SSL_SESSION *b;
        {
        int i;

        i=a->session_id_length - b->session_id_length;
        if (i == 0)
                return(memcmp(a->session_id,b->session_id,
                        a->session_id_length));
        else    return(1);
        }

SSL_CTX *SSL_CTX_new(meth)
SSL_METHOD *meth;
        {
        SSL_CTX *ret;
        
        if (meth == NULL)
                {
                SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
                return(NULL);
                }
        ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
        if (ret == NULL)
                goto err;

        memset(ret,0,sizeof(SSL_CTX));

        ret->method=meth;

        ret->cert_store=NULL;
        ret->session_cache_mode=SSL_SESS_CACHE_SERVER;

        /* We take the system default */
        ret->session_timeout=meth->get_timeout();

        ret->new_session_cb=NULL;
        ret->remove_session_cb=NULL;
        ret->get_session_cb=NULL;

        ret->sess_connect=0;
        ret->sess_connect_good=0;
        ret->sess_accept=0;
        ret->sess_accept_good=0;
        ret->sess_miss=0;
        ret->sess_timeout=0;
        ret->sess_hit=0;
        ret->sess_cb_hit=0;

        ret->references=1;
        ret->quiet_shutdown=0;

/*      ret->cipher=NULL;*/
/*      ret->s2->challenge=NULL;
        ret->master_key=NULL;
        ret->key_arg=NULL;
        ret->s2->conn_id=NULL; */

        ret->info_callback=NULL;

        ret->app_verify_callback=NULL;
        ret->app_verify_arg=NULL;

        ret->default_read_ahead=0;
        ret->default_verify_mode=SSL_VERIFY_NONE;
        ret->default_verify_callback=NULL;
        if ((ret->default_cert=ssl_cert_new()) == NULL)
                goto err;

        ret->default_passwd_callback=NULL;
        ret->client_cert_cb=NULL;

        ret->sessions=lh_new(conn_hash,session_cmp);
        if (ret->sessions == NULL) goto err;
        ret->cert_store=X509_STORE_new();
        if (ret->cert_store == NULL) goto err;

        ssl_create_cipher_list(ret->method,
                &ret->cipher_list,&ret->cipher_list_by_id,
                SSL_DEFAULT_CIPHER_LIST);
        if ((ret->cipher_list == NULL) || (sk_num(ret->cipher_list) <= 0))
                {
                SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
                goto err2;
                }

        if ((ret->client_CA=sk_new_null()) == NULL)
                goto err;

        return(ret);
err:
        SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
err2:
        if (ret != NULL) SSL_CTX_free(ret);
        return(NULL);
        }

void SSL_CTX_free(a)
SSL_CTX *a;
        {
        int i;

        if (a == NULL) return;

        i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
        if (i > 0) return;
#ifdef REF_CHECK
        if (i < 0)
                {
                fprintf(stderr,"SSL_CTX_free, bad reference count\n");
                abort(); /* ok */
                }
#endif

        if (a->sessions != NULL)
                {
                SSL_CTX_flush_sessions(a,0);
                lh_free(a->sessions);
                }
        if (a->cert_store != NULL)
                X509_STORE_free(a->cert_store);
        if (a->cipher_list != NULL)
                sk_free(a->cipher_list);
        if (a->cipher_list_by_id != NULL)
                sk_free(a->cipher_list_by_id);
        if (a->default_cert != NULL)
                ssl_cert_free(a->default_cert);
        if (a->client_CA != NULL)
                sk_pop_free(a->client_CA,X509_NAME_free);
        Free((char *)a);
        }

void SSL_CTX_set_default_passwd_cb(ctx,cb)
SSL_CTX *ctx;
int (*cb)();
        {
        ctx->default_passwd_callback=cb;
        }

void SSL_CTX_set_cert_verify_cb(ctx,cb,arg)
SSL_CTX *ctx;
int (*cb)();
char *arg;
        {
        ctx->app_verify_callback=cb;
        ctx->app_verify_arg=arg;
        }

void SSL_CTX_set_verify(ctx,mode,cb)
SSL_CTX *ctx;
int mode;
int (*cb)();
        {
        ctx->default_verify_mode=mode;
        ctx->default_verify_callback=cb;
        /* This needs cleaning up EAY EAY EAY */
        X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
        }

void ssl_set_cert_masks(c)
CERT *c;
        {
        CERT_PKEY *cpk;
        int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
        int rsa_enc_export,dh_rsa_export,dh_dsa_export;
        int rsa_tmp_export,dh_tmp_export;
        unsigned long mask,emask;

        if ((c == NULL) || (c->valid)) return;

#ifndef NO_RSA
        rsa_tmp=((c->rsa_tmp != NULL) || (c->rsa_tmp_cb != NULL))?1:0;
        rsa_tmp_export=((c->rsa_tmp_cb != NULL) ||
                (rsa_tmp && (RSA_size(c->rsa_tmp)*8 <= 512)))?1:0;
#else
        rsa_tmp=rsa_tmp_export=0;
#endif
#ifndef NO_DH
        dh_tmp=((c->dh_tmp != NULL) || (c->dh_tmp_cb != NULL))?1:0;
        dh_tmp_export=((c->dh_tmp_cb != NULL) ||
                (dh_tmp && (DH_size(c->dh_tmp)*8 <= 512)))?1:0;
#else
        dh_tmp=dh_tmp_export=0;
#endif

        cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
        rsa_enc= ((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
        rsa_enc_export=(rsa_enc && (EVP_PKEY_size(cpk->privatekey)*8 <= 512))?1:0;
        cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
        rsa_sign=((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
        cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
        dsa_sign=((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
        cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
        dh_rsa=  ((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
        dh_rsa_export=(dh_rsa && (EVP_PKEY_size(cpk->privatekey)*8 <= 512))?1:0;
        cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
/* FIX THIS EAY EAY EAY */
        dh_dsa=  ((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
        dh_dsa_export=(dh_dsa && (EVP_PKEY_size(cpk->privatekey)*8 <= 512))?1:0;

        mask=0;
        emask=0;

#ifdef CIPHER_DEBUG
        printf("rt=%d dht=%d re=%d rs=%d ds=%d dhr=%d dhd=%d\n",
                rsa_tmp,dh_tmp,
                rsa_enc,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
#endif

        if (rsa_enc || (rsa_tmp && rsa_sign))
                mask|=SSL_kRSA;
        if (rsa_enc_export || (rsa_tmp_export && rsa_sign))
                emask|=SSL_kRSA;

#if 0
        /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
        if (    (dh_tmp || dh_rsa || dh_dsa) && 
                (rsa_enc || rsa_sign || dsa_sign))
                mask|=SSL_kEDH;
        if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
                (rsa_enc || rsa_sign || dsa_sign))
                emask|=SSL_kEDH;
#endif

        if (dh_tmp_export) 
                emask|=SSL_kEDH;

        if (dh_tmp)
                mask|=SSL_kEDH;

        if (dh_rsa) mask|=SSL_kDHr;
        if (dh_rsa_export) emask|=SSL_kDHr;

        if (dh_dsa) mask|=SSL_kDHd;
        if (dh_dsa_export) emask|=SSL_kDHd;

        if (rsa_enc || rsa_sign)
                {
                mask|=SSL_aRSA;
                emask|=SSL_aRSA;
                }

        if (dsa_sign)
                {
                mask|=SSL_aDSS;
                emask|=SSL_aDSS;
                }

#ifdef SSL_ALLOW_ADH
        mask|=SSL_aNULL;
        emask|=SSL_aNULL;
#endif

        c->mask=mask;
        c->export_mask=emask;
        c->valid=1;
        }

/* THIS NEEDS CLEANING UP */
X509 *ssl_get_server_send_cert(s)
SSL *s;
        {
        unsigned long alg,mask,kalg;
        CERT *c;
        int i,export;

        c=s->cert;
        ssl_set_cert_masks(c);
        alg=s->s3->tmp.new_cipher->algorithms;
        export=(alg & SSL_EXPORT)?1:0;
        mask=(export)?c->export_mask:c->mask;
        kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);

        if      (kalg & SSL_kDHr)
                i=SSL_PKEY_DH_RSA;
        else if (kalg & SSL_kDHd)
                i=SSL_PKEY_DH_DSA;
        else if (kalg & SSL_aDSS)
                i=SSL_PKEY_DSA_SIGN;
        else if (kalg & SSL_aRSA)
                {
                if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
                        i=SSL_PKEY_RSA_SIGN;
                else
                        i=SSL_PKEY_RSA_ENC;
                }
        else /* if (kalg & SSL_aNULL) */
                {
                SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
                return(NULL);
                }
        if (c->pkeys[i].x509 == NULL) return(NULL);
        return(c->pkeys[i].x509);
        }

EVP_PKEY *ssl_get_sign_pkey(s,cipher)
SSL *s;
SSL_CIPHER *cipher;
        {
        unsigned long alg;
        CERT *c;

        alg=cipher->algorithms;
        c=s->cert;

        if ((alg & SSL_aDSS) &&
                (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
                return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
        else if (alg & SSL_aRSA)
                {
                if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
                        return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
                else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
                        return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
                else
                        return(NULL);
                }
        else /* if (alg & SSL_aNULL) */
                {
                SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
                return(NULL);
                }
        }

void ssl_update_cache(s,mode)
SSL *s;
int mode;
        {
        if ((s->ctx->session_cache_mode & mode)
                && (!s->hit)
                && SSL_CTX_add_session(s->ctx,s->session)
                && (s->ctx->new_session_cb != NULL))
                {
                CRYPTO_add(&s->session->references,1,
                        CRYPTO_LOCK_SSL_SESSION);
                if (!s->ctx->new_session_cb(s,s->session))
                        SSL_SESSION_free(s->session);
                }

        /* auto flush every 255 connections */
        if ((!(s->ctx->session_cache_mode &
                SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
                ((s->ctx->sess_connect_good & 0xff) == 0))
                SSL_CTX_flush_sessions(s->ctx,time(NULL));
        }

SSL_METHOD *SSL_get_ssl_method(s)
SSL *s;
        {
        return(s->method);
        }

int SSL_set_ssl_method(s,meth)
SSL *s;
SSL_METHOD *meth;
        {
        int conn= -1;
        int ret=1;

        if (s->method != meth)
                {
                if (s->handshake_func != NULL)
                        conn=(s->handshake_func == s->method->ssl_connect);

                if (s->method->version == meth->version)
                        s->method=meth;
                else
                        {
                        s->method->ssl_free(s);
                        s->method=meth;
                        ret=s->method->ssl_new(s);
                        }

                if (conn == 1)
                        s->handshake_func=meth->ssl_connect;
                else if (conn == 0)
                        s->handshake_func=meth->ssl_accept;
                }
        return(ret);
        }

int SSL_get_error(s,i)
SSL *s;
int i;
        {
        int reason;
        BIO *bio;

        if (i > 0) return(SSL_ERROR_NONE);

        if (ERR_peek_error() != 0)
                return(SSL_ERROR_SSL);

        if ((i < 0) && SSL_want_read(s))
                {
                bio=SSL_get_rbio(s);
                if (BIO_should_read(bio))
                        return(SSL_ERROR_WANT_READ);
                else if (BIO_should_write(bio))
                        return(SSL_ERROR_WANT_WRITE);
                else if (BIO_should_io_special(bio))
                        {
                        reason=BIO_get_retry_reason(bio);
                        if (reason == BIO_RR_CONNECT)
                                return(SSL_ERROR_WANT_CONNECT);
                        else
                                return(SSL_ERROR_SYSCALL); /* unknown */
                        }
                }

        if ((i < 0) && SSL_want_write(s))
                {
                bio=SSL_get_wbio(s);
                if (BIO_should_write(bio))
                        return(SSL_ERROR_WANT_WRITE);
                else if (BIO_should_read(bio))
                        return(SSL_ERROR_WANT_READ);
                else if (BIO_should_io_special(bio))
                        {
                        reason=BIO_get_retry_reason(bio);
                        if (reason == BIO_RR_CONNECT)
                                return(SSL_ERROR_WANT_CONNECT);
                        else
                                return(SSL_ERROR_SYSCALL);
                        }
                }
        if ((i < 0) && SSL_want_x509_lookup(s))
                {
                return(SSL_ERROR_WANT_X509_LOOKUP);
                }

        if (i == 0)
                {
                if (s->version == 2)
                        {
                        /* assume it is the socket being closed */
                        return(SSL_ERROR_ZERO_RETURN);
                        }
                else
                        {
                        if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
                                (s->s3->warn_alert == SSL3_AD_CLOSE_NOTIFY))
                                return(SSL_ERROR_ZERO_RETURN);
                        }
                }
        return(SSL_ERROR_SYSCALL);
        }

int SSL_do_handshake(s)
SSL *s;
        {
        if (s->handshake_func == NULL)
                {
                SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_INTERNAL_ERROR);
                return(-1);
                }
        if (SSL_in_init(s) || SSL_in_before(s))
                return(s->handshake_func(s));
        else
                return(1);
        }

/* For the next 2 functions, SSL_clear() sets shutdown and so
 * one of these calls will reset it */
void SSL_set_accept_state(s)
SSL *s;
        {
        s->shutdown=0;
        s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
        s->handshake_func=s->method->ssl_accept;
        /* clear the current cipher */
        ssl_clear_cipher_ctx(s);
        }

void SSL_set_connect_state(s)
SSL *s;
        {
        s->shutdown=0;
        s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
        s->handshake_func=s->method->ssl_connect;
        /* clear the current cipher */
        ssl_clear_cipher_ctx(s);
        }

int ssl_undefined_function(s)
SSL *s;
        {
        SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
        return(0);
        }

SSL_METHOD *ssl_bad_method(ver)
int ver;
        {
        SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
        return(NULL);
        }

char *SSL_get_version(s)
SSL *s;
        {
        if (s->version == 3)
                return("SSLv3");
        else if (s->version == 2)
                return("SSLv2");
        else
                return("unknown");
        }

SSL *SSL_dup(s)
SSL *s;
        {
        STACK *sk;
        X509_NAME *xn;
        SSL *ret;
        int i;
                 
        if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL) return(NULL);
                          
        /* This copies version, session-id, SSL_METHOD and 'cert' */
        SSL_copy_session_id(ret,s);

        SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
        SSL_set_verify(ret,SSL_get_verify_mode(s),
                SSL_get_verify_callback(s));

        SSL_set_info_callback(ret,SSL_get_info_callback(s));
        
        ret->debug=s->debug;

        /* copy app data, a little dangerous perhaps */
        SSL_set_app_data(ret,SSL_get_app_data(s));

        /* setup rbio, and wbio */
        if (s->rbio != NULL)
                {
                if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
                        goto err;
                }
        if (s->wbio != NULL)
                {
                if (s->wbio != s->rbio)
                        {
                        if (!BIO_dup_state(s->wbio,(char *)&ret->rbio))
                                goto err;
                        }
                else
                        ret->wbio=ret->rbio;
                }

        /* dup the cipher_list and cipher_list_by_id stacks */
        if (s->cipher_list != NULL)
                {
                if ((ret->cipher_list=sk_dup(s->cipher_list)) == NULL)
                        goto err;
                }
        if (s->cipher_list_by_id != NULL)
                if ((ret->cipher_list_by_id=sk_dup(s->cipher_list_by_id))
                        == NULL)
                        goto err;

        /* Dup the client_CA list */
        if (s->client_CA != NULL)
                {
                if ((sk=sk_dup(s->client_CA)) == NULL) goto err;
                ret->client_CA=sk;
                for (i=0; i<sk_num(sk); i++)
                        {
                        xn=(X509_NAME *)sk_value(sk,i);
                        if ((sk_value(sk,i)=(char *)X509_NAME_dup(xn)) == NULL)
                                {
                                X509_NAME_free(xn);
                                goto err;
                                }
                        }
                }

        ret->shutdown=s->shutdown;
        ret->state=s->state;
        ret->handshake_func=s->handshake_func;

        if (0)
                {
err:
                if (ret != NULL) SSL_free(ret);
                ret=NULL;
                }
        return(ret);
        }

void ssl_clear_cipher_ctx(s)
SSL *s;
        {
        if (s->enc_read_ctx != NULL)
                {
                EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
                Free(s->enc_read_ctx);
                s->enc_read_ctx=NULL;
                }
        if (s->enc_write_ctx != NULL)
                {
                EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
                Free(s->enc_write_ctx);
                s->enc_write_ctx=NULL;
                }
        }

X509 *SSL_get_certificate(s)
SSL *s;
        {
        if (s->cert != NULL)
                return(s->cert->key->x509);
        else
                return(NULL);
        }

EVP_PKEY *SSL_get_privatekey(s)
SSL *s;
        {
        if (s->cert != NULL)
                return(s->cert->key->privatekey);
        else
                return(NULL);
        }

SSL_CIPHER *SSL_get_current_cipher(s)
SSL *s;
        {
        if ((s->session != NULL) && (s->session->cipher != NULL))
                return(s->session->cipher);
        return(NULL);
        }