Reject empty generation strings.
[openssl.git] / apps / s_cb.c
index cd086bb93ed02251f4e64926ef94b8912d8fe89d..9ab11cf0544db7008a4b07df615f3372dc820fe1 100644 (file)
@@ -1,25 +1,25 @@
-/* apps/s_cb.c */
+/* 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:
  *     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 
+ * 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
  * 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) 1998-2006 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>
 #include "apps.h"
 #undef NON_MAIN
 #undef USE_SOCKETS
-#include "err.h"
-#include "x509.h"
-#include "ssl.h"
+#include <openssl/err.h>
+#include <openssl/rand.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(ok, ctx)
-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,256);
-       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,256);
-               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_UTCTIME_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_UTCTIME_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(ctx, cert_file, key_file)
-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);
-                       }
-
-               ssl=SSL_new(ctx);
-               x509=SSL_get_certificate(ssl);
-
-               if (x509 != NULL)
-                       EVP_PKEY_copy_parameters(X509_get_pubkey(x509),
-                               SSL_get_privatekey(ssl));
-               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);
-       }
-
-long MS_CALLBACK bio_dump_cb(bio,cmd,argp,argi,argl,ret)
-BIO *bio;
-int cmd;
-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 %08X [%08lX] (%d bytes => %ld (0x%X))\n",
-                       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 %08X [%08lX] (%d bytes => %ld (0x%X))\n",
-                       bio,argp,argi,ret,ret);
-               BIO_dump(out,argp,(int)ret);
-               }
-       return(ret);
-       }
-
-void MS_CALLBACK apps_ssl_info_callback(s,where,ret)
-SSL *s;
-int where;
-int ret;
-       {
-       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));
-                       }
-               }
-       }
+#define COOKIE_SECRET_LENGTH    16
+
+int verify_depth = 0;
+int verify_error = X509_V_OK;
+int verify_return_error = 0;
+unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
+int cookie_initialized = 0;
+
+int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
+{
+    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);
+
+    BIO_printf(bio_err, "depth=%d ", depth);
+    if (err_cert) {
+        X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
+                           0, XN_FLAG_ONELINE);
+        BIO_puts(bio_err, "\n");
+    } else
+        BIO_puts(bio_err, "<no cert>\n");
+    if (!ok) {
+        BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
+                   X509_verify_cert_error_string(err));
+        if (verify_depth >= depth) {
+            if (!verify_return_error)
+                ok = 1;
+            verify_error = X509_V_OK;
+        } else {
+            ok = 0;
+            verify_error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
+        }
+    }
+    switch (err) {
+    case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
+        BIO_puts(bio_err, "issuer= ");
+        X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
+                           0, XN_FLAG_ONELINE);
+        BIO_puts(bio_err, "\n");
+        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(err_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(err_cert));
+        BIO_printf(bio_err, "\n");
+        break;
+    case X509_V_ERR_NO_EXPLICIT_POLICY:
+        policies_print(bio_err, ctx);
+        break;
+    }
+    if (err == X509_V_OK && ok == 2)
+        policies_print(bio_err, ctx);
+
+    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] (%lu bytes => %ld (0x%lX))\n",
+                   (void *)bio, argp, (unsigned long)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] (%lu bytes => %ld (0x%lX))\n",
+                   (void *)bio, argp, (unsigned long)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;
+    case TLS1_1_VERSION:
+        str_version = "TLS 1.1 ";
+        break;
+    case TLS1_2_VERSION:
+        str_version = "TLS 1.2 ";
+        break;
+    case DTLS1_VERSION:
+        str_version = "DTLS 1.0 ";
+        break;
+    case DTLS1_BAD_VER:
+        str_version = "DTLS 1.0 (bad) ";
+        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 ||
+        version == TLS1_1_VERSION ||
+        version == TLS1_2_VERSION ||
+        version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
+        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;
+                case 110:
+                    str_details2 = " unsupported_extension";
+                    break;
+                case 111:
+                    str_details2 = " certificate_unobtainable";
+                    break;
+                case 112:
+                    str_details2 = " unrecognized_name";
+                    break;
+                case 113:
+                    str_details2 = " bad_certificate_status_response";
+                    break;
+                case 114:
+                    str_details2 = " bad_certificate_hash_value";
+                    break;
+                case 115:
+                    str_details2 = " unknown_psk_identity";
+                    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 3:
+                    str_details1 = ", HelloVerifyRequest";
+                    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;
+                }
+            }
+        }
+#ifndef OPENSSL_NO_HEARTBEATS
+        if (content_type == 24) { /* Heartbeat */
+            str_details1 = ", Heartbeat";
+
+            if (len > 0) {
+                switch (((const unsigned char *)buf)[0]) {
+                case 1:
+                    str_details1 = ", HeartbeatRequest";
+                    break;
+                case 2:
+                    str_details1 = ", HeartbeatResponse";
+                    break;
+                }
+            }
+        }
+#endif
+    }
+
+    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");
+    }
+    (void)BIO_flush(bio);
+}
+
+void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
+                           unsigned char *data, int len, void *arg)
+{
+    BIO *bio = arg;
+    char *extname;
+
+    switch (type) {
+    case TLSEXT_TYPE_server_name:
+        extname = "server name";
+        break;
+
+    case TLSEXT_TYPE_max_fragment_length:
+        extname = "max fragment length";
+        break;
+
+    case TLSEXT_TYPE_client_certificate_url:
+        extname = "client certificate URL";
+        break;
+
+    case TLSEXT_TYPE_trusted_ca_keys:
+        extname = "trusted CA keys";
+        break;
+
+    case TLSEXT_TYPE_truncated_hmac:
+        extname = "truncated HMAC";
+        break;
+
+    case TLSEXT_TYPE_status_request:
+        extname = "status request";
+        break;
+
+    case TLSEXT_TYPE_user_mapping:
+        extname = "user mapping";
+        break;
+
+    case TLSEXT_TYPE_client_authz:
+        extname = "client authz";
+        break;
+
+    case TLSEXT_TYPE_server_authz:
+        extname = "server authz";
+        break;
+
+    case TLSEXT_TYPE_cert_type:
+        extname = "cert type";
+        break;
+
+    case TLSEXT_TYPE_elliptic_curves:
+        extname = "elliptic curves";
+        break;
+
+    case TLSEXT_TYPE_ec_point_formats:
+        extname = "EC point formats";
+        break;
+
+    case TLSEXT_TYPE_srp:
+        extname = "SRP";
+        break;
+
+    case TLSEXT_TYPE_signature_algorithms:
+        extname = "signature algorithms";
+        break;
+
+    case TLSEXT_TYPE_use_srtp:
+        extname = "use SRTP";
+        break;
+
+    case TLSEXT_TYPE_heartbeat:
+        extname = "heartbeat";
+        break;
+
+    case TLSEXT_TYPE_session_ticket:
+        extname = "session ticket";
+        break;
+
+    case TLSEXT_TYPE_renegotiate:
+        extname = "renegotiation info";
+        break;
+
+#ifdef TLSEXT_TYPE_opaque_prf_input
+    case TLSEXT_TYPE_opaque_prf_input:
+        extname = "opaque PRF input";
+        break;
+#endif
+#ifdef TLSEXT_TYPE_next_proto_neg
+    case TLSEXT_TYPE_next_proto_neg:
+        extname = "next protocol";
+        break;
+#endif
+
+    case TLSEXT_TYPE_padding:
+        extname = "TLS padding";
+        break;
+
+    default:
+        extname = "unknown";
+        break;
+
+    }
+
+    BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
+               client_server ? "server" : "client", extname, type, len);
+    BIO_dump(bio, (char *)data, len);
+    (void)BIO_flush(bio);
+}
+
+int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie,
+                                         unsigned int *cookie_len)
+{
+    unsigned char *buffer, result[EVP_MAX_MD_SIZE];
+    unsigned int length, resultlength;
+    union {
+        struct sockaddr sa;
+        struct sockaddr_in s4;
+#if OPENSSL_USE_IPV6
+        struct sockaddr_in6 s6;
+#endif
+    } peer;
+
+    /* Initialize a random secret */
+    if (!cookie_initialized) {
+        if (RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH) <= 0) {
+            BIO_printf(bio_err, "error setting random cookie secret\n");
+            return 0;
+        }
+        cookie_initialized = 1;
+    }
+
+    /* Read peer information */
+    (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
+
+    /* Create buffer with peer's address and port */
+    length = 0;
+    switch (peer.sa.sa_family) {
+    case AF_INET:
+        length += sizeof(struct in_addr);
+        length += sizeof(peer.s4.sin_port);
+        break;
+#if OPENSSL_USE_IPV6
+    case AF_INET6:
+        length += sizeof(struct in6_addr);
+        length += sizeof(peer.s6.sin6_port);
+        break;
+#endif
+    default:
+        OPENSSL_assert(0);
+        break;
+    }
+    buffer = OPENSSL_malloc(length);
+
+    if (buffer == NULL) {
+        BIO_printf(bio_err, "out of memory\n");
+        return 0;
+    }
+
+    switch (peer.sa.sa_family) {
+    case AF_INET:
+        memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
+        memcpy(buffer + sizeof(peer.s4.sin_port),
+               &peer.s4.sin_addr, sizeof(struct in_addr));
+        break;
+#if OPENSSL_USE_IPV6
+    case AF_INET6:
+        memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
+        memcpy(buffer + sizeof(peer.s6.sin6_port),
+               &peer.s6.sin6_addr, sizeof(struct in6_addr));
+        break;
+#endif
+    default:
+        OPENSSL_assert(0);
+        break;
+    }
+
+    /* Calculate HMAC of buffer using the secret */
+    HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
+         buffer, length, result, &resultlength);
+    OPENSSL_free(buffer);
+
+    memcpy(cookie, result, resultlength);
+    *cookie_len = resultlength;
+
+    return 1;
+}
+
+int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie,
+                                       unsigned int cookie_len)
+{
+    unsigned char *buffer, result[EVP_MAX_MD_SIZE];
+    unsigned int length, resultlength;
+    union {
+        struct sockaddr sa;
+        struct sockaddr_in s4;
+#if OPENSSL_USE_IPV6
+        struct sockaddr_in6 s6;
+#endif
+    } peer;
+
+    /* If secret isn't initialized yet, the cookie can't be valid */
+    if (!cookie_initialized)
+        return 0;
+
+    /* Read peer information */
+    (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
+
+    /* Create buffer with peer's address and port */
+    length = 0;
+    switch (peer.sa.sa_family) {
+    case AF_INET:
+        length += sizeof(struct in_addr);
+        length += sizeof(peer.s4.sin_port);
+        break;
+#if OPENSSL_USE_IPV6
+    case AF_INET6:
+        length += sizeof(struct in6_addr);
+        length += sizeof(peer.s6.sin6_port);
+        break;
+#endif
+    default:
+        OPENSSL_assert(0);
+        break;
+    }
+    buffer = OPENSSL_malloc(length);
+
+    if (buffer == NULL) {
+        BIO_printf(bio_err, "out of memory\n");
+        return 0;
+    }
+
+    switch (peer.sa.sa_family) {
+    case AF_INET:
+        memcpy(buffer, &peer.s4.sin_port, sizeof(peer.s4.sin_port));
+        memcpy(buffer + sizeof(peer.s4.sin_port),
+               &peer.s4.sin_addr, sizeof(struct in_addr));
+        break;
+#if OPENSSL_USE_IPV6
+    case AF_INET6:
+        memcpy(buffer, &peer.s6.sin6_port, sizeof(peer.s6.sin6_port));
+        memcpy(buffer + sizeof(peer.s6.sin6_port),
+               &peer.s6.sin6_addr, sizeof(struct in6_addr));
+        break;
+#endif
+    default:
+        OPENSSL_assert(0);
+        break;
+    }
+
+    /* Calculate HMAC of buffer using the secret */
+    HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
+         buffer, length, result, &resultlength);
+    OPENSSL_free(buffer);
+
+    if (cookie_len == resultlength
+        && memcmp(result, cookie, resultlength) == 0)
+        return 1;
 
+    return 0;
+}