src/third_party/openssl/openssl/ssl/s2_lib.c - cobalt - Git at Google

 /* ssl/s2_lib.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.]
  */
 /* ====================================================================
  * Copyright (c) 1998-2007 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 "ssl_locl.h"
 #ifndef OPENSSL_NO_SSL2
 #include <openssl/opensslconf.h>
 #if !defined(OPENSSL_SYS_STARBOARD)
 # include <stdio.h>
 #endif  // !defined(OPENSSL_SYS_STARBOARD)
 # include <openssl/objects.h>
 # include <openssl/evp.h>
 # include <openssl/md5.h>

 const char ssl2_version_str[] = "SSLv2" OPENSSL_VERSION_PTEXT;

 # define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))

 /* list of available SSLv2 ciphers (sorted by id) */
 OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[] = {
 # if 0
 /* NULL_WITH_MD5 v3 */
     {
      1,
      SSL2_TXT_NULL_WITH_MD5,
      SSL2_CK_NULL_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_eNULL,
      SSL_MD5,
      SSL_SSLV2,
      SSL_EXPORT | SSL_EXP40 | SSL_STRONG_NONE,
      0,
      0,
      0,
      },
 # endif

 /* RC4_128_WITH_MD5 */
     {
      1,
      SSL2_TXT_RC4_128_WITH_MD5,
      SSL2_CK_RC4_128_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_RC4,
      SSL_MD5,
      SSL_SSLV2,
      SSL_NOT_EXP | SSL_MEDIUM,
      0,
      128,
      128,
      },

 /* RC4_128_EXPORT40_WITH_MD5 */
     {
      1,
      SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
      SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_RC4,
      SSL_MD5,
      SSL_SSLV2,
      SSL_EXPORT | SSL_EXP40,
      SSL2_CF_5_BYTE_ENC,
      40,
      128,
      },

 /* RC2_128_CBC_WITH_MD5 */
     {
      1,
      SSL2_TXT_RC2_128_CBC_WITH_MD5,
      SSL2_CK_RC2_128_CBC_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_RC2,
      SSL_MD5,
      SSL_SSLV2,
      SSL_NOT_EXP | SSL_MEDIUM,
      0,
      128,
      128,
      },

 /* RC2_128_CBC_EXPORT40_WITH_MD5 */
     {
      1,
      SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
      SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_RC2,
      SSL_MD5,
      SSL_SSLV2,
      SSL_EXPORT | SSL_EXP40,
      SSL2_CF_5_BYTE_ENC,
      40,
      128,
      },

 # ifndef OPENSSL_NO_IDEA
 /* IDEA_128_CBC_WITH_MD5 */
     {
      1,
      SSL2_TXT_IDEA_128_CBC_WITH_MD5,
      SSL2_CK_IDEA_128_CBC_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_IDEA,
      SSL_MD5,
      SSL_SSLV2,
      SSL_NOT_EXP | SSL_MEDIUM,
      0,
      128,
      128,
      },
 # endif

 /* DES_64_CBC_WITH_MD5 */
     {
      1,
      SSL2_TXT_DES_64_CBC_WITH_MD5,
      SSL2_CK_DES_64_CBC_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_DES,
      SSL_MD5,
      SSL_SSLV2,
      SSL_NOT_EXP | SSL_LOW,
      0,
      56,
      56,
      },

 /* DES_192_EDE3_CBC_WITH_MD5 */
     {
      1,
      SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
      SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_3DES,
      SSL_MD5,
      SSL_SSLV2,
      SSL_NOT_EXP | SSL_HIGH,
      0,
      112,
      168,
      },

 # if 0
 /* RC4_64_WITH_MD5 */
     {
      1,
      SSL2_TXT_RC4_64_WITH_MD5,
      SSL2_CK_RC4_64_WITH_MD5,
      SSL_kRSA,
      SSL_aRSA,
      SSL_RC4,
      SSL_MD5,
      SSL_SSLV2,
      SSL_NOT_EXP | SSL_LOW,
      SSL2_CF_8_BYTE_ENC,
      64,
      64,
      },
 # endif

 # if 0
 /* NULL SSLeay (testing) */
     {
      0,
      SSL2_TXT_NULL,
      SSL2_CK_NULL,
      0,
      0,
      0,
      0,
      SSL_SSLV2,
      SSL_STRONG_NONE,
      0,
      0,
      0,
      },
 # endif

 /* end of list :-) */
 };

 long ssl2_default_timeout(void)
 {
     return (300);
 }

 int ssl2_num_ciphers(void)
 {
     return (SSL2_NUM_CIPHERS);
 }

 const SSL_CIPHER *ssl2_get_cipher(unsigned int u)
 {
     if (u < SSL2_NUM_CIPHERS)
         return (&(ssl2_ciphers[SSL2_NUM_CIPHERS - 1 - u]));
     else
         return (NULL);
 }

 int ssl2_pending(const SSL *s)
 {
     return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
 }

 int ssl2_new(SSL *s)
 {
     SSL2_STATE *s2;

     if ((s2 = OPENSSL_malloc(sizeof *s2)) == NULL)
         goto err;
     OPENSSL_port_memset(s2, 0, sizeof *s2);

 # if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
 #  error "assertion failed"
 # endif

     if ((s2->rbuf =
          OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2)) == NULL)
         goto err;
     /*
      * wbuf needs one byte more because when using two-byte headers, we leave
      * the first byte unused in do_ssl_write (s2_pkt.c)
      */
     if ((s2->wbuf =
          OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 3)) == NULL)
         goto err;
     s->s2 = s2;

     ssl2_clear(s);
     return (1);
  err:
     if (s2 != NULL) {
         if (s2->wbuf != NULL)
             OPENSSL_free(s2->wbuf);
         if (s2->rbuf != NULL)
             OPENSSL_free(s2->rbuf);
         OPENSSL_free(s2);
     }
     return (0);
 }

 void ssl2_free(SSL *s)
 {
     SSL2_STATE *s2;

     if (s == NULL)
         return;

     s2 = s->s2;
     if (s2->rbuf != NULL)
         OPENSSL_free(s2->rbuf);
     if (s2->wbuf != NULL)
         OPENSSL_free(s2->wbuf);
     OPENSSL_cleanse(s2, sizeof *s2);
     OPENSSL_free(s2);
     s->s2 = NULL;
 }

 void ssl2_clear(SSL *s)
 {
     SSL2_STATE *s2;
     unsigned char *rbuf, *wbuf;

     s2 = s->s2;

     rbuf = s2->rbuf;
     wbuf = s2->wbuf;

     OPENSSL_port_memset(s2, 0, sizeof *s2);

     s2->rbuf = rbuf;
     s2->wbuf = wbuf;
     s2->clear_text = 1;
     s->packet = s2->rbuf;
     s->version = SSL2_VERSION;
     s->packet_length = 0;
 }

 long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
 {
     int ret = 0;

     switch (cmd) {
     case SSL_CTRL_GET_SESSION_REUSED:
         ret = s->hit;
         break;
     case SSL_CTRL_CHECK_PROTO_VERSION:
         return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg);
     default:
         break;
     }
     return (ret);
 }

 long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
 {
     return (0);
 }

 long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
 {
     return (0);
 }

 long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
 {
     return (0);
 }

 /*
  * This function needs to check if the ciphers required are actually
  * available
  */
 const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
 {
     SSL_CIPHER c;
     const SSL_CIPHER *cp;
     unsigned long id;

     id = 0x02000000L | ((unsigned long)p[0] << 16L) |
         ((unsigned long)p[1] << 8L) | (unsigned long)p[2];
     c.id = id;
     cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
     if ((cp == NULL) || (cp->valid == 0))
         return NULL;
     else
         return cp;
 }

 int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
 {
     long l;

     if (p != NULL) {
         l = c->id;
         if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV)
             return (0);
         p[0] = ((unsigned char)(l >> 16L)) & 0xFF;
         p[1] = ((unsigned char)(l >> 8L)) & 0xFF;
         p[2] = ((unsigned char)(l)) & 0xFF;
     }
     return (3);
 }

 int ssl2_generate_key_material(SSL *s)
 {
     unsigned int i;
     EVP_MD_CTX ctx;
     unsigned char *km;
     unsigned char c = '0';
     const EVP_MD *md5;
     int md_size;

     md5 = EVP_md5();

 # ifdef CHARSET_EBCDIC
     c = os_toascii['0'];        /* Must be an ASCII '0', not EBCDIC '0', see
                                  * SSLv2 docu */
 # endif
     EVP_MD_CTX_init(&ctx);
     km = s->s2->key_material;

     if (s->session->master_key_length < 0 ||
         s->session->master_key_length > (int)sizeof(s->session->master_key)) {
         SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
         return 0;
     }
     md_size = EVP_MD_size(md5);
     if (md_size < 0)
         return 0;
     for (i = 0; i < s->s2->key_material_length; i += md_size) {
         if (((km - s->s2->key_material) + md_size) >
             (int)sizeof(s->s2->key_material)) {
             /*
              * EVP_DigestFinal_ex() below would write beyond buffer
              */
             SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
             return 0;
         }

         EVP_DigestInit_ex(&ctx, md5, NULL);

         OPENSSL_assert(s->session->master_key_length >= 0
                        && s->session->master_key_length
                        <= (int)sizeof(s->session->master_key));
         EVP_DigestUpdate(&ctx, s->session->master_key,
                          s->session->master_key_length);
         EVP_DigestUpdate(&ctx, &c, 1);
         c++;
         EVP_DigestUpdate(&ctx, s->s2->challenge, s->s2->challenge_length);
         EVP_DigestUpdate(&ctx, s->s2->conn_id, s->s2->conn_id_length);
         EVP_DigestFinal_ex(&ctx, km, NULL);
         km += md_size;
     }

     EVP_MD_CTX_cleanup(&ctx);
     return 1;
 }

 void ssl2_return_error(SSL *s, int err)
 {
     if (!s->error) {
         s->error = 3;
         s->error_code = err;

         ssl2_write_error(s);
     }
 }

 void ssl2_write_error(SSL *s)
 {
     unsigned char buf[3];
     int i, error;

     buf[0] = SSL2_MT_ERROR;
     buf[1] = (s->error_code >> 8) & 0xff;
     buf[2] = (s->error_code) & 0xff;

 /*      state=s->rwstate;*/

     error = s->error;           /* number of bytes left to write */
     s->error = 0;
     OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
     i = ssl2_write(s, &(buf[3 - error]), error);

 /*      if (i == error) s->rwstate=state; */

     if (i < 0)
         s->error = error;
     else {
         s->error = error - i;

         if (s->error == 0)
             if (s->msg_callback) {
                 /* ERROR */
                 s->msg_callback(1, s->version, 0, buf, 3, s,
                                 s->msg_callback_arg);
             }
     }
 }

 int ssl2_shutdown(SSL *s)
 {
     s->shutdown = (SSL_SENT_SHUTDOWN | SSL_RECEIVED_SHUTDOWN);
     return (1);
 }
 #else                           /* !OPENSSL_NO_SSL2 */

 # if PEDANTIC
 static void *dummy = &dummy;
 # endif

 #endif
	/* ssl/s2_lib.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.]
	*/
	/* ====================================================================
	* Copyright (c) 1998-2007 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 "ssl_locl.h"
	#ifndef OPENSSL_NO_SSL2
	#include <openssl/opensslconf.h>
	#if !defined(OPENSSL_SYS_STARBOARD)
	# include <stdio.h>
	#endif // !defined(OPENSSL_SYS_STARBOARD)
	# include <openssl/objects.h>
	# include <openssl/evp.h>
	# include <openssl/md5.h>

	const char ssl2_version_str[] = "SSLv2" OPENSSL_VERSION_PTEXT;

	# define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))

	/* list of available SSLv2 ciphers (sorted by id) */
	OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[] = {
	# if 0
	/* NULL_WITH_MD5 v3 */
	{
	1,
	SSL2_TXT_NULL_WITH_MD5,
	SSL2_CK_NULL_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_eNULL,
	SSL_MD5,
	SSL_SSLV2,
	SSL_EXPORT \| SSL_EXP40 \| SSL_STRONG_NONE,
	0,
	0,
	0,
	},
	# endif

	/* RC4_128_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC4_128_WITH_MD5,
	SSL2_CK_RC4_128_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC4,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP \| SSL_MEDIUM,
	0,
	128,
	128,
	},

	/* RC4_128_EXPORT40_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
	SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC4,
	SSL_MD5,
	SSL_SSLV2,
	SSL_EXPORT \| SSL_EXP40,
	SSL2_CF_5_BYTE_ENC,
	40,
	128,
	},

	/* RC2_128_CBC_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC2_128_CBC_WITH_MD5,
	SSL2_CK_RC2_128_CBC_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC2,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP \| SSL_MEDIUM,
	0,
	128,
	128,
	},

	/* RC2_128_CBC_EXPORT40_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
	SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC2,
	SSL_MD5,
	SSL_SSLV2,
	SSL_EXPORT \| SSL_EXP40,
	SSL2_CF_5_BYTE_ENC,
	40,
	128,
	},

	# ifndef OPENSSL_NO_IDEA
	/* IDEA_128_CBC_WITH_MD5 */
	{
	1,
	SSL2_TXT_IDEA_128_CBC_WITH_MD5,
	SSL2_CK_IDEA_128_CBC_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_IDEA,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP \| SSL_MEDIUM,
	0,
	128,
	128,
	},
	# endif

	/* DES_64_CBC_WITH_MD5 */
	{
	1,
	SSL2_TXT_DES_64_CBC_WITH_MD5,
	SSL2_CK_DES_64_CBC_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_DES,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP \| SSL_LOW,
	0,
	56,
	56,
	},

	/* DES_192_EDE3_CBC_WITH_MD5 */
	{
	1,
	SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
	SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_3DES,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP \| SSL_HIGH,
	0,
	112,
	168,
	},

	# if 0
	/* RC4_64_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC4_64_WITH_MD5,
	SSL2_CK_RC4_64_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC4,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP \| SSL_LOW,
	SSL2_CF_8_BYTE_ENC,
	64,
	64,
	},
	# endif

	# if 0
	/* NULL SSLeay (testing) */
	{
	0,
	SSL2_TXT_NULL,
	SSL2_CK_NULL,
	0,
	0,
	0,
	0,
	SSL_SSLV2,
	SSL_STRONG_NONE,
	0,
	0,
	0,
	},
	# endif

	/* end of list :-) */
	};

	long ssl2_default_timeout(void)
	{
	return (300);
	}

	int ssl2_num_ciphers(void)
	{
	return (SSL2_NUM_CIPHERS);
	}

	const SSL_CIPHER *ssl2_get_cipher(unsigned int u)
	{
	if (u < SSL2_NUM_CIPHERS)
	return (&(ssl2_ciphers[SSL2_NUM_CIPHERS - 1 - u]));
	else
	return (NULL);
	}

	int ssl2_pending(const SSL *s)
	{
	return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
	}

	int ssl2_new(SSL *s)
	{
	SSL2_STATE *s2;

	if ((s2 = OPENSSL_malloc(sizeof *s2)) == NULL)
	goto err;
	OPENSSL_port_memset(s2, 0, sizeof *s2);

	# if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
	# error "assertion failed"
	# endif

	if ((s2->rbuf =
	OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2)) == NULL)
	goto err;
	/*
	* wbuf needs one byte more because when using two-byte headers, we leave
	* the first byte unused in do_ssl_write (s2_pkt.c)
	*/
	if ((s2->wbuf =
	OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 3)) == NULL)
	goto err;
	s->s2 = s2;

	ssl2_clear(s);
	return (1);
	err:
	if (s2 != NULL) {
	if (s2->wbuf != NULL)
	OPENSSL_free(s2->wbuf);
	if (s2->rbuf != NULL)
	OPENSSL_free(s2->rbuf);
	OPENSSL_free(s2);
	}
	return (0);
	}

	void ssl2_free(SSL *s)
	{
	SSL2_STATE *s2;

	if (s == NULL)
	return;

	s2 = s->s2;
	if (s2->rbuf != NULL)
	OPENSSL_free(s2->rbuf);
	if (s2->wbuf != NULL)
	OPENSSL_free(s2->wbuf);
	OPENSSL_cleanse(s2, sizeof *s2);
	OPENSSL_free(s2);
	s->s2 = NULL;
	}

	void ssl2_clear(SSL *s)
	{
	SSL2_STATE *s2;
	unsigned char rbuf, wbuf;

	s2 = s->s2;

	rbuf = s2->rbuf;
	wbuf = s2->wbuf;

	OPENSSL_port_memset(s2, 0, sizeof *s2);

	s2->rbuf = rbuf;
	s2->wbuf = wbuf;
	s2->clear_text = 1;
	s->packet = s2->rbuf;
	s->version = SSL2_VERSION;
	s->packet_length = 0;
	}

	long ssl2_ctrl(SSL s, int cmd, long larg, void parg)
	{
	int ret = 0;

	switch (cmd) {
	case SSL_CTRL_GET_SESSION_REUSED:
	ret = s->hit;
	break;
	case SSL_CTRL_CHECK_PROTO_VERSION:
	return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg);
	default:
	break;
	}
	return (ret);
	}

	long ssl2_callback_ctrl(SSL s, int cmd, void (fp) (void))
	{
	return (0);
	}

	long ssl2_ctx_ctrl(SSL_CTX ctx, int cmd, long larg, void parg)
	{
	return (0);
	}

	long ssl2_ctx_callback_ctrl(SSL_CTX ctx, int cmd, void (fp) (void))
	{
	return (0);
	}

	/*
	* This function needs to check if the ciphers required are actually
	* available
	*/
	const SSL_CIPHER ssl2_get_cipher_by_char(const unsigned char p)
	{
	SSL_CIPHER c;
	const SSL_CIPHER *cp;
	unsigned long id;

	id = 0x02000000L \| ((unsigned long)p[0] << 16L) \|
	((unsigned long)p[1] << 8L) \| (unsigned long)p[2];
	c.id = id;
	cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
	if ((cp == NULL) \|\| (cp->valid == 0))
	return NULL;
	else
	return cp;
	}

	int ssl2_put_cipher_by_char(const SSL_CIPHER c, unsigned char p)
	{
	long l;

	if (p != NULL) {
	l = c->id;
	if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV)
	return (0);
	p[0] = ((unsigned char)(l >> 16L)) & 0xFF;
	p[1] = ((unsigned char)(l >> 8L)) & 0xFF;
	p[2] = ((unsigned char)(l)) & 0xFF;
	}
	return (3);
	}

	int ssl2_generate_key_material(SSL *s)
	{
	unsigned int i;
	EVP_MD_CTX ctx;
	unsigned char *km;
	unsigned char c = '0';
	const EVP_MD *md5;
	int md_size;

	md5 = EVP_md5();

	# ifdef CHARSET_EBCDIC
	c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0', see
	* SSLv2 docu */
	# endif
	EVP_MD_CTX_init(&ctx);
	km = s->s2->key_material;

	if (s->session->master_key_length < 0 \|\|
	s->session->master_key_length > (int)sizeof(s->session->master_key)) {
	SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
	return 0;
	}
	md_size = EVP_MD_size(md5);
	if (md_size < 0)
	return 0;
	for (i = 0; i < s->s2->key_material_length; i += md_size) {
	if (((km - s->s2->key_material) + md_size) >
	(int)sizeof(s->s2->key_material)) {
	/*
	* EVP_DigestFinal_ex() below would write beyond buffer
	*/
	SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
	return 0;
	}

	EVP_DigestInit_ex(&ctx, md5, NULL);

	OPENSSL_assert(s->session->master_key_length >= 0
	&& s->session->master_key_length
	<= (int)sizeof(s->session->master_key));
	EVP_DigestUpdate(&ctx, s->session->master_key,
	s->session->master_key_length);
	EVP_DigestUpdate(&ctx, &c, 1);
	c++;
	EVP_DigestUpdate(&ctx, s->s2->challenge, s->s2->challenge_length);
	EVP_DigestUpdate(&ctx, s->s2->conn_id, s->s2->conn_id_length);
	EVP_DigestFinal_ex(&ctx, km, NULL);
	km += md_size;
	}

	EVP_MD_CTX_cleanup(&ctx);
	return 1;
	}

	void ssl2_return_error(SSL *s, int err)
	{
	if (!s->error) {
	s->error = 3;
	s->error_code = err;

	ssl2_write_error(s);
	}
	}

	void ssl2_write_error(SSL *s)
	{
	unsigned char buf[3];
	int i, error;

	buf[0] = SSL2_MT_ERROR;
	buf[1] = (s->error_code >> 8) & 0xff;
	buf[2] = (s->error_code) & 0xff;

	/* state=s->rwstate;*/

	error = s->error; /* number of bytes left to write */
	s->error = 0;
	OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
	i = ssl2_write(s, &(buf[3 - error]), error);

	/* if (i == error) s->rwstate=state; */

	if (i < 0)
	s->error = error;
	else {
	s->error = error - i;

	if (s->error == 0)
	if (s->msg_callback) {
	/* ERROR */
	s->msg_callback(1, s->version, 0, buf, 3, s,
	s->msg_callback_arg);
	}
	}
	}

	int ssl2_shutdown(SSL *s)
	{
	s->shutdown = (SSL_SENT_SHUTDOWN \| SSL_RECEIVED_SHUTDOWN);
	return (1);
	}
	#else /* !OPENSSL_NO_SSL2 */

	# if PEDANTIC
	static void *dummy = &dummy;
	# endif

	#endif