s_cb.c

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/* apps/s_cb.c - callback functions used by s_client, s_server, and s_time */
/* 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).
 *
 */

#include <stdio.h>
#include <stdlib.h>
#define USE_SOCKETS
#define NON_MAIN
#include "apps.h"
#undef NON_MAIN
#undef USE_SOCKETS
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/ssl.h>
#include "s_apps.h"

int verify_depth=0;
int verify_error=X509_V_OK;

int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
        {
        char buf[256];
        X509 *err_cert;
        int err,depth;

        err_cert=X509_STORE_CTX_get_current_cert(ctx);
        err=    X509_STORE_CTX_get_error(ctx);
        depth=  X509_STORE_CTX_get_error_depth(ctx);

        X509_NAME_oneline(X509_get_subject_name(err_cert),buf,sizeof buf);
        BIO_printf(bio_err,"depth=%d %s\n",depth,buf);
        if (!ok)
                {
                BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
                        X509_verify_cert_error_string(err));
                if (verify_depth >= depth)
                        {
                        ok=1;
                        verify_error=X509_V_OK;
                        }
                else
                        {
                        ok=0;
                        verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
                        }
                }
        switch (ctx->error)
                {
        case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
                X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,sizeof buf);
                BIO_printf(bio_err,"issuer= %s\n",buf);
                break;
        case X509_V_ERR_CERT_NOT_YET_VALID:
        case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
                BIO_printf(bio_err,"notBefore=");
                ASN1_TIME_print(bio_err,X509_get_notBefore(ctx->current_cert));
                BIO_printf(bio_err,"\n");
                break;
        case X509_V_ERR_CERT_HAS_EXPIRED:
        case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
                BIO_printf(bio_err,"notAfter=");
                ASN1_TIME_print(bio_err,X509_get_notAfter(ctx->current_cert));
                BIO_printf(bio_err,"\n");
                break;
                }
        BIO_printf(bio_err,"verify return:%d\n",ok);
        return(ok);
        }

int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
        {
        if (cert_file != NULL)
                {
                /*
                SSL *ssl;
                X509 *x509;
                */

                if (SSL_CTX_use_certificate_file(ctx,cert_file,
                        SSL_FILETYPE_PEM) <= 0)
                        {
                        BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
                        ERR_print_errors(bio_err);
                        return(0);
                        }
                if (key_file == NULL) key_file=cert_file;
                if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
                        SSL_FILETYPE_PEM) <= 0)
                        {
                        BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
                        ERR_print_errors(bio_err);
                        return(0);
                        }

                /*
                In theory this is no longer needed 
                ssl=SSL_new(ctx);
                x509=SSL_get_certificate(ssl);

                if (x509 != NULL) {
                        EVP_PKEY *pktmp;
                        pktmp = X509_get_pubkey(x509);
                        EVP_PKEY_copy_parameters(pktmp,
                                                SSL_get_privatekey(ssl));
                        EVP_PKEY_free(pktmp);
                }
                SSL_free(ssl);
                */

                /* If we are using DSA, we can copy the parameters from
                 * the private key */
                
                
                /* Now we know that a key and cert have been set against
                 * the SSL context */
                if (!SSL_CTX_check_private_key(ctx))
                        {
                        BIO_printf(bio_err,"Private key does not match the certificate public key\n");
                        return(0);
                        }
                }
        return(1);
        }

int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
        {
        if (cert ==  NULL)
                return 1;
        if (SSL_CTX_use_certificate(ctx,cert) <= 0)
                {
                BIO_printf(bio_err,"error setting certificate\n");
                ERR_print_errors(bio_err);
                return 0;
                }
        if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
                {
                BIO_printf(bio_err,"error setting private key\n");
                ERR_print_errors(bio_err);
                return 0;
                }

                
                /* Now we know that a key and cert have been set against
                 * the SSL context */
        if (!SSL_CTX_check_private_key(ctx))
                {
                BIO_printf(bio_err,"Private key does not match the certificate public key\n");
                return 0;
                }
        return 1;
        }

long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
        int argi, long argl, long ret)
        {
        BIO *out;

        out=(BIO *)BIO_get_callback_arg(bio);
        if (out == NULL) return(ret);

        if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
                {
                BIO_printf(out,"read from %p [%p] (%d bytes => %ld (0x%lX))\n",
                        (void *)bio,argp,argi,ret,ret);
                BIO_dump(out,argp,(int)ret);
                return(ret);
                }
        else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
                {
                BIO_printf(out,"write to %p [%p] (%d bytes => %ld (0x%lX))\n",
                        (void *)bio,argp,argi,ret,ret);
                BIO_dump(out,argp,(int)ret);
                }
        return(ret);
        }

void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
        {
        const char *str;
        int w;

        w=where& ~SSL_ST_MASK;

        if (w & SSL_ST_CONNECT) str="SSL_connect";
        else if (w & SSL_ST_ACCEPT) str="SSL_accept";
        else str="undefined";

        if (where & SSL_CB_LOOP)
                {
                BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
                }
        else if (where & SSL_CB_ALERT)
                {
                str=(where & SSL_CB_READ)?"read":"write";
                BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
                        str,
                        SSL_alert_type_string_long(ret),
                        SSL_alert_desc_string_long(ret));
                }
        else if (where & SSL_CB_EXIT)
                {
                if (ret == 0)
                        BIO_printf(bio_err,"%s:failed in %s\n",
                                str,SSL_state_string_long(s));
                else if (ret < 0)
                        {
                        BIO_printf(bio_err,"%s:error in %s\n",
                                str,SSL_state_string_long(s));
                        }
                }
        }


void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
        {
        BIO *bio = arg;
        const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
        
        str_write_p = write_p ? ">>>" : "<<<";

        switch (version)
                {
        case SSL2_VERSION:
                str_version = "SSL 2.0";
                break;
        case SSL3_VERSION:
                str_version = "SSL 3.0 ";
                break;
        case TLS1_VERSION:
                str_version = "TLS 1.0 ";
                break;
        default:
                str_version = "???";
                }

        if (version == SSL2_VERSION)
                {
                str_details1 = "???";

                if (len > 0)
                        {
                        switch (((const unsigned char*)buf)[0])
                                {
                                case 0:
                                        str_details1 = ", ERROR:";
                                        str_details2 = " ???";
                                        if (len >= 3)
                                                {
                                                unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
                                                
                                                switch (err)
                                                        {
                                                case 0x0001:
                                                        str_details2 = " NO-CIPHER-ERROR";
                                                        break;
                                                case 0x0002:
                                                        str_details2 = " NO-CERTIFICATE-ERROR";
                                                        break;
                                                case 0x0004:
                                                        str_details2 = " BAD-CERTIFICATE-ERROR";
                                                        break;
                                                case 0x0006:
                                                        str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
                                                        break;
                                                        }
                                                }

                                        break;
                                case 1:
                                        str_details1 = ", CLIENT-HELLO";
                                        break;
                                case 2:
                                        str_details1 = ", CLIENT-MASTER-KEY";
                                        break;
                                case 3:
                                        str_details1 = ", CLIENT-FINISHED";
                                        break;
                                case 4:
                                        str_details1 = ", SERVER-HELLO";
                                        break;
                                case 5:
                                        str_details1 = ", SERVER-VERIFY";
                                        break;
                                case 6:
                                        str_details1 = ", SERVER-FINISHED";
                                        break;
                                case 7:
                                        str_details1 = ", REQUEST-CERTIFICATE";
                                        break;
                                case 8:
                                        str_details1 = ", CLIENT-CERTIFICATE";
                                        break;
                                }
                        }
                }

        if (version == SSL3_VERSION || version == TLS1_VERSION)
                {
                switch (content_type)
                        {
                case 20:
                        str_content_type = "ChangeCipherSpec";
                        break;
                case 21:
                        str_content_type = "Alert";
                        break;
                case 22:
                        str_content_type = "Handshake";
                        break;
                        }

                if (content_type == 21) /* Alert */
                        {
                        str_details1 = ", ???";
                        
                        if (len == 2)
                                {
                                switch (((const unsigned char*)buf)[0])
                                        {
                                case 1:
                                        str_details1 = ", warning";
                                        break;
                                case 2:
                                        str_details1 = ", fatal";
                                        break;
                                        }

                                str_details2 = " ???";
                                switch (((const unsigned char*)buf)[1])
                                        {
                                case 0:
                                        str_details2 = " close_notify";
                                        break;
                                case 10:
                                        str_details2 = " unexpected_message";
                                        break;
                                case 20:
                                        str_details2 = " bad_record_mac";
                                        break;
                                case 21:
                                        str_details2 = " decryption_failed";
                                        break;
                                case 22:
                                        str_details2 = " record_overflow";
                                        break;
                                case 30:
                                        str_details2 = " decompression_failure";
                                        break;
                                case 40:
                                        str_details2 = " handshake_failure";
                                        break;
                                case 42:
                                        str_details2 = " bad_certificate";
                                        break;
                                case 43:
                                        str_details2 = " unsupported_certificate";
                                        break;
                                case 44:
                                        str_details2 = " certificate_revoked";
                                        break;
                                case 45:
                                        str_details2 = " certificate_expired";
                                        break;
                                case 46:
                                        str_details2 = " certificate_unknown";
                                        break;
                                case 47:
                                        str_details2 = " illegal_parameter";
                                        break;
                                case 48:
                                        str_details2 = " unknown_ca";
                                        break;
                                case 49:
                                        str_details2 = " access_denied";
                                        break;
                                case 50:
                                        str_details2 = " decode_error";
                                        break;
                                case 51:
                                        str_details2 = " decrypt_error";
                                        break;
                                case 60:
                                        str_details2 = " export_restriction";
                                        break;
                                case 70:
                                        str_details2 = " protocol_version";
                                        break;
                                case 71:
                                        str_details2 = " insufficient_security";
                                        break;
                                case 80:
                                        str_details2 = " internal_error";
                                        break;
                                case 90:
                                        str_details2 = " user_canceled";
                                        break;
                                case 100:
                                        str_details2 = " no_renegotiation";
                                        break;
                                        }
                                }
                        }
                
                if (content_type == 22) /* Handshake */
                        {
                        str_details1 = "???";

                        if (len > 0)
                                {
                                switch (((const unsigned char*)buf)[0])
                                        {
                                case 0:
                                        str_details1 = ", HelloRequest";
                                        break;
                                case 1:
                                        str_details1 = ", ClientHello";
                                        break;
                                case 2:
                                        str_details1 = ", ServerHello";
                                        break;
                                case 11:
                                        str_details1 = ", Certificate";
                                        break;
                                case 12:
                                        str_details1 = ", ServerKeyExchange";
                                        break;
                                case 13:
                                        str_details1 = ", CertificateRequest";
                                        break;
                                case 14:
                                        str_details1 = ", ServerHelloDone";
                                        break;
                                case 15:
                                        str_details1 = ", CertificateVerify";
                                        break;
                                case 16:
                                        str_details1 = ", ClientKeyExchange";
                                        break;
                                case 20:
                                        str_details1 = ", Finished";
                                        break;
                                        }
                                }
                        }
                }

        BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2);

        if (len > 0)
                {
                size_t num, i;
                
                BIO_printf(bio, "   ");
                num = len;
#if 0
                if (num > 16)
                        num = 16;
#endif
                for (i = 0; i < num; i++)
                        {
                        if (i % 16 == 0 && i > 0)
                                BIO_printf(bio, "\n   ");
                        BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
                        }
                if (i < len)
                        BIO_printf(bio, " ...");
                BIO_printf(bio, "\n");
                }
        BIO_flush(bio);
        }

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