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/* ssl/ssl2.h */
/* 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.]
 */

#ifndef HEADER_SSL2_H
# define HEADER_SSL2_H

#ifdef  __cplusplus
extern "C" {
#endif

/* Protocol Version Codes */
# define SSL2_VERSION            0x0002
# define SSL2_VERSION_MAJOR      0x00
# define SSL2_VERSION_MINOR      0x02
/* #define SSL2_CLIENT_VERSION  0x0002 */
/* #define SSL2_SERVER_VERSION  0x0002 */

/* Protocol Message Codes */
# define SSL2_MT_ERROR                   0
# define SSL2_MT_CLIENT_HELLO            1
# define SSL2_MT_CLIENT_MASTER_KEY       2
# define SSL2_MT_CLIENT_FINISHED         3
# define SSL2_MT_SERVER_HELLO            4
# define SSL2_MT_SERVER_VERIFY           5
# define SSL2_MT_SERVER_FINISHED         6
# define SSL2_MT_REQUEST_CERTIFICATE     7
# define SSL2_MT_CLIENT_CERTIFICATE      8

/* Error Message Codes */
# define SSL2_PE_UNDEFINED_ERROR         0x0000
# define SSL2_PE_NO_CIPHER               0x0001
# define SSL2_PE_NO_CERTIFICATE          0x0002
# define SSL2_PE_BAD_CERTIFICATE         0x0004
# define SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE 0x0006

/* Cipher Kind Values */
# define SSL2_CK_NULL_WITH_MD5                   0x02000000/* v3 */
# define SSL2_CK_RC4_128_WITH_MD5                0x02010080
# define SSL2_CK_RC4_128_EXPORT40_WITH_MD5       0x02020080
# define SSL2_CK_RC2_128_CBC_WITH_MD5            0x02030080
# define SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5   0x02040080
# define SSL2_CK_IDEA_128_CBC_WITH_MD5           0x02050080
# define SSL2_CK_DES_64_CBC_WITH_MD5             0x02060040
# define SSL2_CK_DES_64_CBC_WITH_SHA             0x02060140/* v3 */
# define SSL2_CK_DES_192_EDE3_CBC_WITH_MD5       0x020700c0
# define SSL2_CK_DES_192_EDE3_CBC_WITH_SHA       0x020701c0/* v3 */
# define SSL2_CK_RC4_64_WITH_MD5                 0x02080080/* MS hack */

# define SSL2_CK_DES_64_CFB64_WITH_MD5_1         0x02ff0800/* SSLeay */
# define SSL2_CK_NULL                            0x02ff0810/* SSLeay */

# define SSL2_TXT_DES_64_CFB64_WITH_MD5_1        "DES-CFB-M1"
# define SSL2_TXT_NULL_WITH_MD5                  "NULL-MD5"
# define SSL2_TXT_RC4_128_WITH_MD5               "RC4-MD5"
# define SSL2_TXT_RC4_128_EXPORT40_WITH_MD5      "EXP-RC4-MD5"
# define SSL2_TXT_RC2_128_CBC_WITH_MD5           "RC2-CBC-MD5"
# define SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5  "EXP-RC2-CBC-MD5"
# define SSL2_TXT_IDEA_128_CBC_WITH_MD5          "IDEA-CBC-MD5"
# define SSL2_TXT_DES_64_CBC_WITH_MD5            "DES-CBC-MD5"
# define SSL2_TXT_DES_64_CBC_WITH_SHA            "DES-CBC-SHA"
# define SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5      "DES-CBC3-MD5"
# define SSL2_TXT_DES_192_EDE3_CBC_WITH_SHA      "DES-CBC3-SHA"
# define SSL2_TXT_RC4_64_WITH_MD5                "RC4-64-MD5"

# define SSL2_TXT_NULL                           "NULL"

/* Flags for the SSL_CIPHER.algorithm2 field */
# define SSL2_CF_5_BYTE_ENC                      0x01
# define SSL2_CF_8_BYTE_ENC                      0x02

/* Certificate Type Codes */
# define SSL2_CT_X509_CERTIFICATE                0x01

/* Authentication Type Code */
# define SSL2_AT_MD5_WITH_RSA_ENCRYPTION         0x01

# define SSL2_MAX_SSL_SESSION_ID_LENGTH          32

/* Upper/Lower Bounds */
# define SSL2_MAX_MASTER_KEY_LENGTH_IN_BITS      256
# ifdef OPENSSL_SYS_MPE
#  define SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER    29998u
# else
#  define SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER    32767u
                                                       /* 2^15-1 */
# endif
# define SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER    16383/* 2^14-1 */

# define SSL2_CHALLENGE_LENGTH   16
/*
 * #define SSL2_CHALLENGE_LENGTH 32
 */
# define SSL2_MIN_CHALLENGE_LENGTH       16
# define SSL2_MAX_CHALLENGE_LENGTH       32
# define SSL2_CONNECTION_ID_LENGTH       16
# define SSL2_MAX_CONNECTION_ID_LENGTH   16
# define SSL2_SSL_SESSION_ID_LENGTH      16
# define SSL2_MAX_CERT_CHALLENGE_LENGTH  32
# define SSL2_MIN_CERT_CHALLENGE_LENGTH  16
# define SSL2_MAX_KEY_MATERIAL_LENGTH    24

# ifndef HEADER_SSL_LOCL_H
#  define  CERT           char
# endif

# ifndef OPENSSL_NO_SSL_INTERN

typedef struct ssl2_state_st {
    int three_byte_header;
    int clear_text;             /* clear text */
    int escape;                 /* not used in SSLv2 */
    int ssl2_rollback;          /* used if SSLv23 rolled back to SSLv2 */
    /*
     * non-blocking io info, used to make sure the same args were passwd
     */
    unsigned int wnum;          /* number of bytes sent so far */
    int wpend_tot;
    const unsigned char *wpend_buf;
    int wpend_off;              /* offset to data to write */
    int wpend_len;              /* number of bytes passwd to write */
    int wpend_ret;              /* number of bytes to return to caller */
    /* buffer raw data */
    int rbuf_left;
    int rbuf_offs;
    unsigned char *rbuf;
    unsigned char *wbuf;
    unsigned char *write_ptr;   /* used to point to the start due to 2/3 byte
                                 * header. */
    unsigned int padding;
    unsigned int rlength;       /* passed to ssl2_enc */
    int ract_data_length;       /* Set when things are encrypted. */
    unsigned int wlength;       /* passed to ssl2_enc */
    int wact_data_length;       /* Set when things are decrypted. */
    unsigned char *ract_data;
    unsigned char *wact_data;
    unsigned char *mac_data;
    unsigned char *read_key;
    unsigned char *write_key;
    /* Stuff specifically to do with this SSL session */
    unsigned int challenge_length;
    unsigned char challenge[SSL2_MAX_CHALLENGE_LENGTH];
    unsigned int conn_id_length;
    unsigned char conn_id[SSL2_MAX_CONNECTION_ID_LENGTH];
    unsigned int key_material_length;
    unsigned char key_material[SSL2_MAX_KEY_MATERIAL_LENGTH * 2];
    unsigned long read_sequence;
    unsigned long write_sequence;
    struct {
        unsigned int conn_id_length;
        unsigned int cert_type;
        unsigned int cert_length;
        unsigned int csl;
        unsigned int clear;
        unsigned int enc;
        unsigned char ccl[SSL2_MAX_CERT_CHALLENGE_LENGTH];
        unsigned int cipher_spec_length;
        unsigned int session_id_length;
        unsigned int clen;
        unsigned int rlen;
    } tmp;
} SSL2_STATE;

# endif

/* SSLv2 */
/* client */
# define SSL2_ST_SEND_CLIENT_HELLO_A             (0x10|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_HELLO_B             (0x11|SSL_ST_CONNECT)
# define SSL2_ST_GET_SERVER_HELLO_A              (0x20|SSL_ST_CONNECT)
# define SSL2_ST_GET_SERVER_HELLO_B              (0x21|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_MASTER_KEY_A        (0x30|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_MASTER_KEY_B        (0x31|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_FINISHED_A          (0x40|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_FINISHED_B          (0x41|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_CERTIFICATE_A       (0x50|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_CERTIFICATE_B       (0x51|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_CERTIFICATE_C       (0x52|SSL_ST_CONNECT)
# define SSL2_ST_SEND_CLIENT_CERTIFICATE_D       (0x53|SSL_ST_CONNECT)
# define SSL2_ST_GET_SERVER_VERIFY_A             (0x60|SSL_ST_CONNECT)
# define SSL2_ST_GET_SERVER_VERIFY_B             (0x61|SSL_ST_CONNECT)
# define SSL2_ST_GET_SERVER_FINISHED_A           (0x70|SSL_ST_CONNECT)
# define SSL2_ST_GET_SERVER_FINISHED_B           (0x71|SSL_ST_CONNECT)
# define SSL2_ST_CLIENT_START_ENCRYPTION         (0x80|SSL_ST_CONNECT)
# define SSL2_ST_X509_GET_CLIENT_CERTIFICATE     (0x90|SSL_ST_CONNECT)
/* server */
# define SSL2_ST_GET_CLIENT_HELLO_A              (0x10|SSL_ST_ACCEPT)
# define SSL2_ST_GET_CLIENT_HELLO_B              (0x11|SSL_ST_ACCEPT)
# define SSL2_ST_GET_CLIENT_HELLO_C              (0x12|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_SERVER_HELLO_A             (0x20|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_SERVER_HELLO_B             (0x21|SSL_ST_ACCEPT)
# define SSL2_ST_GET_CLIENT_MASTER_KEY_A         (0x30|SSL_ST_ACCEPT)
# define SSL2_ST_GET_CLIENT_MASTER_KEY_B         (0x31|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_SERVER_VERIFY_A            (0x40|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_SERVER_VERIFY_B            (0x41|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_SERVER_VERIFY_C            (0x42|SSL_ST_ACCEPT)
# define SSL2_ST_GET_CLIENT_FINISHED_A           (0x50|SSL_ST_ACCEPT)
# define SSL2_ST_GET_CLIENT_FINISHED_B           (0x51|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_SERVER_FINISHED_A          (0x60|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_SERVER_FINISHED_B          (0x61|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_REQUEST_CERTIFICATE_A      (0x70|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_REQUEST_CERTIFICATE_B      (0x71|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_REQUEST_CERTIFICATE_C      (0x72|SSL_ST_ACCEPT)
# define SSL2_ST_SEND_REQUEST_CERTIFICATE_D      (0x73|SSL_ST_ACCEPT)
# define SSL2_ST_SERVER_START_ENCRYPTION         (0x80|SSL_ST_ACCEPT)
# define SSL2_ST_X509_GET_SERVER_CERTIFICATE     (0x90|SSL_ST_ACCEPT)

#ifdef  __cplusplus
}
#endif
#endif