Change functions to ANSI C.

[thirdparty/openssl.git] / ssl / t1_enc.c

/* ssl/t1_enc.c */
/* 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.]
 */

#include <stdio.h>
#include "comp.h"
#include "evp.h"
#include "hmac.h"
#include "ssl_locl.h"

static void tls1_P_hash(EVP_MD *md, unsigned char *sec, int sec_len,
             unsigned char *seed, int seed_len, unsigned char *out, int olen)
        {
        int chunk,n;
        unsigned int j;
        HMAC_CTX ctx;
        HMAC_CTX ctx_tmp;
        unsigned char A1[HMAC_MAX_MD_CBLOCK];
        unsigned int A1_len;
        
        chunk=EVP_MD_size(md);

        HMAC_Init(&ctx,sec,sec_len,md);
        HMAC_Update(&ctx,seed,seed_len);
        HMAC_Final(&ctx,A1,&A1_len);

        n=0;
        for (;;)
                {
                HMAC_Init(&ctx,NULL,0,NULL); /* re-init */
                HMAC_Update(&ctx,A1,A1_len);
                memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */
                HMAC_Update(&ctx,seed,seed_len);

                if (olen > chunk)
                        {
                        HMAC_Final(&ctx,out,&j);
                        out+=j;
                        olen-=j;
                        HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
                        }
                else    /* last one */
                        {
                        HMAC_Final(&ctx,A1,&A1_len);
                        memcpy(out,A1,olen);
                        break;
                        }
                }
        HMAC_cleanup(&ctx);
        HMAC_cleanup(&ctx_tmp);
        memset(A1,0,sizeof(A1));
        }

static void tls1_PRF(EVP_MD *md5, EVP_MD *sha1, unsigned char *label,
             int label_len, unsigned char *sec, int slen, unsigned char *out1,
             unsigned char *out2, int olen)
        {
        int len,i;
        unsigned char *S1,*S2;

        len=slen/2;
        S1=sec;
        S2= &(sec[len]);
        len+=(slen&1); /* add for odd, make longer */

        
        tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
        tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);

        for (i=0; i<olen; i++)
                out1[i]^=out2[i];
        }

static void tls1_generate_key_block(SSL *s, unsigned char *km,
             unsigned char *tmp, int num)
        {
        unsigned char *p;
        unsigned char buf[SSL3_RANDOM_SIZE*2+
                TLS_MD_MAX_CONST_SIZE];
        p=buf;

        memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
                TLS_MD_KEY_EXPANSION_CONST_SIZE);
        p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
        memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
        p+=SSL3_RANDOM_SIZE;
        memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
        p+=SSL3_RANDOM_SIZE;

        tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
                s->session->master_key,s->session->master_key_length,
                km,tmp,num);
        }

int tls1_change_cipher_state(SSL *s, int which)
        {
        unsigned char *p,*key_block,*mac_secret;
        unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
                SSL3_RANDOM_SIZE*2];
        unsigned char tmp1[EVP_MAX_KEY_LENGTH];
        unsigned char tmp2[EVP_MAX_KEY_LENGTH];
        unsigned char iv1[EVP_MAX_IV_LENGTH*2];
        unsigned char iv2[EVP_MAX_IV_LENGTH*2];
        unsigned char *ms,*key,*iv,*er1,*er2;
        int client_write;
        EVP_CIPHER_CTX *dd;
        const EVP_CIPHER *c;
        const SSL_COMP *comp;
        const EVP_MD *m;
        int _exp,n,i,j,k,exp_label_len,cl;

        _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
        c=s->s3->tmp.new_sym_enc;
        m=s->s3->tmp.new_hash;
        comp=s->s3->tmp.new_compression;
        key_block=s->s3->tmp.key_block;

        if (which & SSL3_CC_READ)
                {
                if ((s->enc_read_ctx == NULL) &&
                        ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
                        Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
                        goto err;
                dd= s->enc_read_ctx;
                s->read_hash=m;
                if (s->expand != NULL)
                        {
                        COMP_CTX_free(s->expand);
                        s->expand=NULL;
                        }
                if (comp != NULL)
                        {
                        s->expand=COMP_CTX_new(comp->method);
                        if (s->expand == NULL)
                                {
                                SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
                                goto err2;
                                }
                        if (s->s3->rrec.comp == NULL)
                                s->s3->rrec.comp=(unsigned char *)
                                        Malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
                        if (s->s3->rrec.comp == NULL)
                                goto err;
                        }
                memset(&(s->s3->read_sequence[0]),0,8);
                mac_secret= &(s->s3->read_mac_secret[0]);
                }
        else
                {
                if ((s->enc_write_ctx == NULL) &&
                        ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
                        Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
                        goto err;
                dd= s->enc_write_ctx;
                s->write_hash=m;
                if (s->compress != NULL)
                        {
                        COMP_CTX_free(s->compress);
                        s->compress=NULL;
                        }
                if (comp != NULL)
                        {
                        s->compress=COMP_CTX_new(comp->method);
                        if (s->compress == NULL)
                                {
                                SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
                                goto err2;
                                }
                        }
                memset(&(s->s3->write_sequence[0]),0,8);
                mac_secret= &(s->s3->write_mac_secret[0]);
                }

        EVP_CIPHER_CTX_init(dd);

        p=s->s3->tmp.key_block;
        i=EVP_MD_size(m);
        cl=EVP_CIPHER_key_length(c);
        j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
                  cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
        /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
        k=EVP_CIPHER_iv_length(c);
        er1= &(s->s3->client_random[0]);
        er2= &(s->s3->server_random[0]);
        if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
                (which == SSL3_CHANGE_CIPHER_SERVER_READ))
                {
                ms=  &(p[ 0]); n=i+i;
                key= &(p[ n]); n+=j+j;
                iv=  &(p[ n]); n+=k+k;
                exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
                exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
                client_write=1;
                }
        else
                {
                n=i;
                ms=  &(p[ n]); n+=i+j;
                key= &(p[ n]); n+=j+k;
                iv=  &(p[ n]); n+=k;
                exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
                exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
                client_write=0;
                }

        if (n > s->s3->tmp.key_block_length)
                {
                SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR);
                goto err2;
                }

        memcpy(mac_secret,ms,i);
#ifdef TLS_DEBUG
printf("which = %04X\nmac key=",which);
{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
#endif
        if (_exp)
                {
                /* In here I set both the read and write key/iv to the
                 * same value since only the correct one will be used :-).
                 */
                p=buf;
                memcpy(p,exp_label,exp_label_len);
                p+=exp_label_len;
                memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
                p+=SSL3_RANDOM_SIZE;
                memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
                p+=SSL3_RANDOM_SIZE;
                tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
                         tmp1,tmp2,EVP_CIPHER_key_length(c));
                key=tmp1;

                if (k > 0)
                        {
                        p=buf;
                        memcpy(p,TLS_MD_IV_BLOCK_CONST,
                                TLS_MD_IV_BLOCK_CONST_SIZE);
                        p+=TLS_MD_IV_BLOCK_CONST_SIZE;
                        memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
                        p+=SSL3_RANDOM_SIZE;
                        memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
                        p+=SSL3_RANDOM_SIZE;
                        tls1_PRF(s->ctx->md5,s->ctx->sha1,
                                buf,(int)(p-buf),"",0,iv1,iv2,k*2);
                        if (client_write)
                                iv=iv1;
                        else
                                iv= &(iv1[k]);
                        }
                }

        s->session->key_arg_length=0;

        EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
#ifdef TLS_DEBUG
printf("which = %04X\nkey=",which);
{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
printf("\niv=");
{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
printf("\n");
#endif

        memset(tmp1,0,sizeof(tmp1));
        memset(tmp2,0,sizeof(tmp1));
        memset(iv1,0,sizeof(iv1));
        memset(iv2,0,sizeof(iv2));
        return(1);
err:
        SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
err2:
        return(0);
        }

int tls1_setup_key_block(SSL *s)
        {
        unsigned char *p1,*p2;
        const EVP_CIPHER *c;
        const EVP_MD *hash;
        int num;
        SSL_COMP *comp;

        if (s->s3->tmp.key_block_length != 0)
                return(1);

        if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
                {
                SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
                return(0);
                }

        s->s3->tmp.new_sym_enc=c;
        s->s3->tmp.new_hash=hash;

        num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
        num*=2;

        ssl3_cleanup_key_block(s);

        if ((p1=(unsigned char *)Malloc(num)) == NULL)
                goto err;
        if ((p2=(unsigned char *)Malloc(num)) == NULL)
                goto err;

        s->s3->tmp.key_block_length=num;
        s->s3->tmp.key_block=p1;


#ifdef TLS_DEBUG
printf("client random\n");
{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
printf("server random\n");
{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
printf("pre-master\n");
{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
#endif
        tls1_generate_key_block(s,p1,p2,num);
        memset(p2,0,num);
        Free(p2);
#ifdef TLS_DEBUG
printf("\nkey block\n");
{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
#endif

        return(1);
err:
        SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
        return(0);
        }

int tls1_enc(SSL *s, int send)
        {
        SSL3_RECORD *rec;
        EVP_CIPHER_CTX *ds;
        unsigned long l;
        int bs,i,ii,j,k,n=0;
        const EVP_CIPHER *enc;

        if (send)
                {
                if (s->write_hash != NULL)
                        n=EVP_MD_size(s->write_hash);
                ds=s->enc_write_ctx;
                rec= &(s->s3->wrec);
                if (s->enc_write_ctx == NULL)
                        enc=NULL;
                else
                        enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
                }
        else
                {
                if (s->read_hash != NULL)
                        n=EVP_MD_size(s->read_hash);
                ds=s->enc_read_ctx;
                rec= &(s->s3->rrec);
                if (s->enc_read_ctx == NULL)
                        enc=NULL;
                else
                        enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
                }

        if ((s->session == NULL) || (ds == NULL) ||
                (enc == NULL))
                {
                memcpy(rec->data,rec->input,rec->length);
                rec->input=rec->data;
                }
        else
                {
                l=rec->length;
                bs=EVP_CIPHER_block_size(ds->cipher);

                if ((bs != 1) && send)
                        {
                        i=bs-((int)l%bs);

                        /* Add weird padding of upto 256 bytes */

                        /* we need to add 'i' padding bytes of value j */
                        j=i-1;
                        if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
                                {
                                if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
                                        j++;
                                }
                        for (k=(int)l; k<(int)(l+i); k++)
                                rec->input[k]=j;
                        l+=i;
                        rec->length+=i;
                        }

                EVP_Cipher(ds,rec->data,rec->input,l);

                if ((bs != 1) && !send)
                        {
                        ii=i=rec->data[l-1];
                        i++;
                        if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
                                {
                                /* First packet is even in size, so check */
                                if ((memcmp(s->s3->read_sequence,
                                        "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
                                        s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
                                if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
                                        i--;
                                }
                        if (i > (int)rec->length)
                                {
                                SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
                                ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
                                return(0);
                                }
                        for (j=(int)(l-i); j<(int)l; j++)
                                {
                                if (rec->data[j] != ii)
                                        {
                                        SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED);
                                        ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
                                        return(0);
                                        }
                                }
                        rec->length-=i;
                        }
                }
        return(1);
        }

int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
        {
        unsigned int ret;
        EVP_MD_CTX ctx;

        EVP_MD_CTX_copy(&ctx,in_ctx);
        EVP_DigestFinal(&ctx,out,&ret);
        return((int)ret);
        }

int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
             unsigned char *str, int slen, unsigned char *out)
        {
        unsigned int i;
        EVP_MD_CTX ctx;
        unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
        unsigned char *q,buf2[12];

        q=buf;
        memcpy(q,str,slen);
        q+=slen;

        EVP_MD_CTX_copy(&ctx,in1_ctx);
        EVP_DigestFinal(&ctx,q,&i);
        q+=i;
        EVP_MD_CTX_copy(&ctx,in2_ctx);
        EVP_DigestFinal(&ctx,q,&i);
        q+=i;

        tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
                s->session->master_key,s->session->master_key_length,
                out,buf2,12);
        memset(&ctx,0,sizeof(EVP_MD_CTX));

        return((int)12);
        }

int tls1_mac(SSL *ssl, unsigned char *md, int send)
        {
        SSL3_RECORD *rec;
        unsigned char *mac_sec,*seq;
        const EVP_MD *hash;
        unsigned int md_size;
        int i;
        HMAC_CTX hmac;
        unsigned char buf[5]; 

        if (send)
                {
                rec= &(ssl->s3->wrec);
                mac_sec= &(ssl->s3->write_mac_secret[0]);
                seq= &(ssl->s3->write_sequence[0]);
                hash=ssl->write_hash;
                }
        else
                {
                rec= &(ssl->s3->rrec);
                mac_sec= &(ssl->s3->read_mac_secret[0]);
                seq= &(ssl->s3->read_sequence[0]);
                hash=ssl->read_hash;
                }

        md_size=EVP_MD_size(hash);

        buf[0]=rec->type;
        buf[1]=TLS1_VERSION_MAJOR;
        buf[2]=TLS1_VERSION_MINOR;
        buf[3]=rec->length>>8;
        buf[4]=rec->length&0xff;

        /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
        HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash);
        HMAC_Update(&hmac,seq,8);
        HMAC_Update(&hmac,buf,5);
        HMAC_Update(&hmac,rec->input,rec->length);
        HMAC_Final(&hmac,md,&md_size);

#ifdef TLS_DEBUG
printf("sec=");
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
printf("seq=");
{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
printf("buf=");
{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
printf("rec=");
{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
#endif

        for (i=7; i>=0; i--)
                if (++seq[i]) break; 

#ifdef TLS_DEBUG
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
#endif
        return(md_size);
        }

int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
             int len)
        {
        unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
        unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];

        /* Setup the stuff to munge */
        memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
                TLS_MD_MASTER_SECRET_CONST_SIZE);
        memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
                s->s3->client_random,SSL3_RANDOM_SIZE);
        memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
                s->s3->server_random,SSL3_RANDOM_SIZE);
        tls1_PRF(s->ctx->md5,s->ctx->sha1,
                buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
                s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE);
        return(SSL3_MASTER_SECRET_SIZE);
        }

int tls1_alert_code(int code)
        {
        switch (code)
                {
        case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
        case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
        case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
        case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
        case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
        case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
        case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
        case SSL_AD_NO_CERTIFICATE:     return(-1);
        case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
        case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
        case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
        case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
        case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
        case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
        case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
        case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
        case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
        case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
        case SSL_AD_EXPORT_RESTRICION:  return(TLS1_AD_EXPORT_RESTRICION);
        case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
        case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
        case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
        case SSL_AD_USER_CANCLED:       return(TLS1_AD_USER_CANCLED);
        case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
        default:                        return(-1);
                }
        }