]> WPIA git - cassiopeia.git/blobdiff - lib/openssl/ssl/ssl3.h
add: execute openssl fetcher to fetch openssl 1.0.1j
[cassiopeia.git] / lib / openssl / ssl / ssl3.h
diff --git a/lib/openssl/ssl/ssl3.h b/lib/openssl/ssl/ssl3.h
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--- /dev/null
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+/* ssl/ssl3.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.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2002 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).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ * ECC cipher suite support in OpenSSL originally developed by 
+ * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
+ */
+
+#ifndef HEADER_SSL3_H 
+#define HEADER_SSL3_H 
+
+#ifndef OPENSSL_NO_COMP
+#include <openssl/comp.h>
+#endif
+#include <openssl/buffer.h>
+#include <openssl/evp.h>
+#include <openssl/ssl.h>
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+/* Signalling cipher suite value from RFC 5746
+ * (TLS_EMPTY_RENEGOTIATION_INFO_SCSV) */
+#define SSL3_CK_SCSV                           0x030000FF
+
+/* Signalling cipher suite value from draft-ietf-tls-downgrade-scsv-00
+ * (TLS_FALLBACK_SCSV) */
+#define SSL3_CK_FALLBACK_SCSV                  0x03005600
+
+#define SSL3_CK_RSA_NULL_MD5                   0x03000001
+#define SSL3_CK_RSA_NULL_SHA                   0x03000002
+#define SSL3_CK_RSA_RC4_40_MD5                         0x03000003
+#define SSL3_CK_RSA_RC4_128_MD5                        0x03000004
+#define SSL3_CK_RSA_RC4_128_SHA                        0x03000005
+#define SSL3_CK_RSA_RC2_40_MD5                 0x03000006
+#define SSL3_CK_RSA_IDEA_128_SHA               0x03000007
+#define SSL3_CK_RSA_DES_40_CBC_SHA             0x03000008
+#define SSL3_CK_RSA_DES_64_CBC_SHA             0x03000009
+#define SSL3_CK_RSA_DES_192_CBC3_SHA           0x0300000A
+
+#define SSL3_CK_DH_DSS_DES_40_CBC_SHA          0x0300000B
+#define SSL3_CK_DH_DSS_DES_64_CBC_SHA          0x0300000C
+#define SSL3_CK_DH_DSS_DES_192_CBC3_SHA        0x0300000D
+#define SSL3_CK_DH_RSA_DES_40_CBC_SHA          0x0300000E
+#define SSL3_CK_DH_RSA_DES_64_CBC_SHA          0x0300000F
+#define SSL3_CK_DH_RSA_DES_192_CBC3_SHA        0x03000010
+
+#define SSL3_CK_EDH_DSS_DES_40_CBC_SHA         0x03000011
+#define SSL3_CK_EDH_DSS_DES_64_CBC_SHA         0x03000012
+#define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA       0x03000013
+#define SSL3_CK_EDH_RSA_DES_40_CBC_SHA         0x03000014
+#define SSL3_CK_EDH_RSA_DES_64_CBC_SHA         0x03000015
+#define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA       0x03000016
+
+#define SSL3_CK_ADH_RC4_40_MD5                 0x03000017
+#define SSL3_CK_ADH_RC4_128_MD5                        0x03000018
+#define SSL3_CK_ADH_DES_40_CBC_SHA             0x03000019
+#define SSL3_CK_ADH_DES_64_CBC_SHA             0x0300001A
+#define SSL3_CK_ADH_DES_192_CBC_SHA            0x0300001B
+
+#if 0
+       #define SSL3_CK_FZA_DMS_NULL_SHA                0x0300001C
+       #define SSL3_CK_FZA_DMS_FZA_SHA                 0x0300001D
+       #if 0 /* Because it clashes with KRB5, is never used any more, and is safe
+                to remove according to David Hopwood <david.hopwood@zetnet.co.uk>
+                of the ietf-tls list */
+       #define SSL3_CK_FZA_DMS_RC4_SHA                 0x0300001E
+       #endif
+#endif
+
+/*    VRS Additional Kerberos5 entries
+ */
+#define SSL3_CK_KRB5_DES_64_CBC_SHA            0x0300001E
+#define SSL3_CK_KRB5_DES_192_CBC3_SHA          0x0300001F
+#define SSL3_CK_KRB5_RC4_128_SHA               0x03000020
+#define SSL3_CK_KRB5_IDEA_128_CBC_SHA          0x03000021
+#define SSL3_CK_KRB5_DES_64_CBC_MD5            0x03000022
+#define SSL3_CK_KRB5_DES_192_CBC3_MD5          0x03000023
+#define SSL3_CK_KRB5_RC4_128_MD5               0x03000024
+#define SSL3_CK_KRB5_IDEA_128_CBC_MD5          0x03000025
+
+#define SSL3_CK_KRB5_DES_40_CBC_SHA            0x03000026
+#define SSL3_CK_KRB5_RC2_40_CBC_SHA            0x03000027
+#define SSL3_CK_KRB5_RC4_40_SHA                        0x03000028
+#define SSL3_CK_KRB5_DES_40_CBC_MD5            0x03000029
+#define SSL3_CK_KRB5_RC2_40_CBC_MD5            0x0300002A
+#define SSL3_CK_KRB5_RC4_40_MD5                        0x0300002B
+
+#define SSL3_TXT_RSA_NULL_MD5                  "NULL-MD5"
+#define SSL3_TXT_RSA_NULL_SHA                  "NULL-SHA"
+#define SSL3_TXT_RSA_RC4_40_MD5                "EXP-RC4-MD5"
+#define SSL3_TXT_RSA_RC4_128_MD5               "RC4-MD5"
+#define SSL3_TXT_RSA_RC4_128_SHA               "RC4-SHA"
+#define SSL3_TXT_RSA_RC2_40_MD5                        "EXP-RC2-CBC-MD5"
+#define SSL3_TXT_RSA_IDEA_128_SHA              "IDEA-CBC-SHA"
+#define SSL3_TXT_RSA_DES_40_CBC_SHA            "EXP-DES-CBC-SHA"
+#define SSL3_TXT_RSA_DES_64_CBC_SHA            "DES-CBC-SHA"
+#define SSL3_TXT_RSA_DES_192_CBC3_SHA          "DES-CBC3-SHA"
+
+#define SSL3_TXT_DH_DSS_DES_40_CBC_SHA         "EXP-DH-DSS-DES-CBC-SHA"
+#define SSL3_TXT_DH_DSS_DES_64_CBC_SHA         "DH-DSS-DES-CBC-SHA"
+#define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA       "DH-DSS-DES-CBC3-SHA"
+#define SSL3_TXT_DH_RSA_DES_40_CBC_SHA         "EXP-DH-RSA-DES-CBC-SHA"
+#define SSL3_TXT_DH_RSA_DES_64_CBC_SHA         "DH-RSA-DES-CBC-SHA"
+#define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA       "DH-RSA-DES-CBC3-SHA"
+
+#define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA                "EXP-EDH-DSS-DES-CBC-SHA"
+#define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA                "EDH-DSS-DES-CBC-SHA"
+#define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA      "EDH-DSS-DES-CBC3-SHA"
+#define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA                "EXP-EDH-RSA-DES-CBC-SHA"
+#define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA                "EDH-RSA-DES-CBC-SHA"
+#define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA      "EDH-RSA-DES-CBC3-SHA"
+
+#define SSL3_TXT_ADH_RC4_40_MD5                        "EXP-ADH-RC4-MD5"
+#define SSL3_TXT_ADH_RC4_128_MD5               "ADH-RC4-MD5"
+#define SSL3_TXT_ADH_DES_40_CBC_SHA            "EXP-ADH-DES-CBC-SHA"
+#define SSL3_TXT_ADH_DES_64_CBC_SHA            "ADH-DES-CBC-SHA"
+#define SSL3_TXT_ADH_DES_192_CBC_SHA           "ADH-DES-CBC3-SHA"
+
+#if 0
+       #define SSL3_TXT_FZA_DMS_NULL_SHA               "FZA-NULL-SHA"
+       #define SSL3_TXT_FZA_DMS_FZA_SHA                "FZA-FZA-CBC-SHA"
+       #define SSL3_TXT_FZA_DMS_RC4_SHA                "FZA-RC4-SHA"
+#endif
+
+#define SSL3_TXT_KRB5_DES_64_CBC_SHA           "KRB5-DES-CBC-SHA"
+#define SSL3_TXT_KRB5_DES_192_CBC3_SHA         "KRB5-DES-CBC3-SHA"
+#define SSL3_TXT_KRB5_RC4_128_SHA              "KRB5-RC4-SHA"
+#define SSL3_TXT_KRB5_IDEA_128_CBC_SHA         "KRB5-IDEA-CBC-SHA"
+#define SSL3_TXT_KRB5_DES_64_CBC_MD5           "KRB5-DES-CBC-MD5"
+#define SSL3_TXT_KRB5_DES_192_CBC3_MD5         "KRB5-DES-CBC3-MD5"
+#define SSL3_TXT_KRB5_RC4_128_MD5              "KRB5-RC4-MD5"
+#define SSL3_TXT_KRB5_IDEA_128_CBC_MD5                 "KRB5-IDEA-CBC-MD5"
+
+#define SSL3_TXT_KRB5_DES_40_CBC_SHA           "EXP-KRB5-DES-CBC-SHA"
+#define SSL3_TXT_KRB5_RC2_40_CBC_SHA           "EXP-KRB5-RC2-CBC-SHA"
+#define SSL3_TXT_KRB5_RC4_40_SHA               "EXP-KRB5-RC4-SHA"
+#define SSL3_TXT_KRB5_DES_40_CBC_MD5           "EXP-KRB5-DES-CBC-MD5"
+#define SSL3_TXT_KRB5_RC2_40_CBC_MD5           "EXP-KRB5-RC2-CBC-MD5"
+#define SSL3_TXT_KRB5_RC4_40_MD5               "EXP-KRB5-RC4-MD5"
+
+#define SSL3_SSL_SESSION_ID_LENGTH             32
+#define SSL3_MAX_SSL_SESSION_ID_LENGTH         32
+
+#define SSL3_MASTER_SECRET_SIZE                        48
+#define SSL3_RANDOM_SIZE                       32
+#define SSL3_SESSION_ID_SIZE                   32
+#define SSL3_RT_HEADER_LENGTH                  5
+
+#ifndef SSL3_ALIGN_PAYLOAD
+ /* Some will argue that this increases memory footprint, but it's
+  * not actually true. Point is that malloc has to return at least
+  * 64-bit aligned pointers, meaning that allocating 5 bytes wastes
+  * 3 bytes in either case. Suggested pre-gaping simply moves these
+  * wasted bytes from the end of allocated region to its front,
+  * but makes data payload aligned, which improves performance:-) */
+# define SSL3_ALIGN_PAYLOAD                    8
+#else
+# if (SSL3_ALIGN_PAYLOAD&(SSL3_ALIGN_PAYLOAD-1))!=0
+#  error "insane SSL3_ALIGN_PAYLOAD"
+#  undef SSL3_ALIGN_PAYLOAD
+# endif
+#endif
+
+/* This is the maximum MAC (digest) size used by the SSL library.
+ * Currently maximum of 20 is used by SHA1, but we reserve for
+ * future extension for 512-bit hashes.
+ */
+
+#define SSL3_RT_MAX_MD_SIZE                    64
+
+/* Maximum block size used in all ciphersuites. Currently 16 for AES.
+ */
+
+#define        SSL_RT_MAX_CIPHER_BLOCK_SIZE            16
+
+#define SSL3_RT_MAX_EXTRA                      (16384)
+
+/* Maximum plaintext length: defined by SSL/TLS standards */
+#define SSL3_RT_MAX_PLAIN_LENGTH               16384
+/* Maximum compression overhead: defined by SSL/TLS standards */
+#define SSL3_RT_MAX_COMPRESSED_OVERHEAD                1024
+
+/* The standards give a maximum encryption overhead of 1024 bytes.
+ * In practice the value is lower than this. The overhead is the maximum
+ * number of padding bytes (256) plus the mac size.
+ */
+#define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE)
+
+/* OpenSSL currently only uses a padding length of at most one block so
+ * the send overhead is smaller.
+ */
+
+#define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
+                       (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)
+
+/* If compression isn't used don't include the compression overhead */
+
+#ifdef OPENSSL_NO_COMP
+#define SSL3_RT_MAX_COMPRESSED_LENGTH          SSL3_RT_MAX_PLAIN_LENGTH
+#else
+#define SSL3_RT_MAX_COMPRESSED_LENGTH  \
+               (SSL3_RT_MAX_PLAIN_LENGTH+SSL3_RT_MAX_COMPRESSED_OVERHEAD)
+#endif
+#define SSL3_RT_MAX_ENCRYPTED_LENGTH   \
+               (SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
+#define SSL3_RT_MAX_PACKET_SIZE                \
+               (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
+
+#define SSL3_MD_CLIENT_FINISHED_CONST  "\x43\x4C\x4E\x54"
+#define SSL3_MD_SERVER_FINISHED_CONST  "\x53\x52\x56\x52"
+
+#define SSL3_VERSION                   0x0300
+#define SSL3_VERSION_MAJOR             0x03
+#define SSL3_VERSION_MINOR             0x00
+
+#define SSL3_RT_CHANGE_CIPHER_SPEC     20
+#define SSL3_RT_ALERT                  21
+#define SSL3_RT_HANDSHAKE              22
+#define SSL3_RT_APPLICATION_DATA       23
+#define TLS1_RT_HEARTBEAT              24
+
+#define SSL3_AL_WARNING                        1
+#define SSL3_AL_FATAL                  2
+
+#define SSL3_AD_CLOSE_NOTIFY            0
+#define SSL3_AD_UNEXPECTED_MESSAGE     10      /* fatal */
+#define SSL3_AD_BAD_RECORD_MAC         20      /* fatal */
+#define SSL3_AD_DECOMPRESSION_FAILURE  30      /* fatal */
+#define SSL3_AD_HANDSHAKE_FAILURE      40      /* fatal */
+#define SSL3_AD_NO_CERTIFICATE         41
+#define SSL3_AD_BAD_CERTIFICATE                42
+#define SSL3_AD_UNSUPPORTED_CERTIFICATE        43
+#define SSL3_AD_CERTIFICATE_REVOKED    44
+#define SSL3_AD_CERTIFICATE_EXPIRED    45
+#define SSL3_AD_CERTIFICATE_UNKNOWN    46
+#define SSL3_AD_ILLEGAL_PARAMETER      47      /* fatal */
+
+#define TLS1_HB_REQUEST                1
+#define TLS1_HB_RESPONSE       2
+       
+#ifndef OPENSSL_NO_SSL_INTERN
+
+typedef struct ssl3_record_st
+       {
+/*r */ int type;               /* type of record */
+/*rw*/ unsigned int length;    /* How many bytes available */
+/*r */ unsigned int off;       /* read/write offset into 'buf' */
+/*rw*/ unsigned char *data;    /* pointer to the record data */
+/*rw*/ unsigned char *input;   /* where the decode bytes are */
+/*r */ unsigned char *comp;    /* only used with decompression - malloc()ed */
+/*r */  unsigned long epoch;    /* epoch number, needed by DTLS1 */
+/*r */  unsigned char seq_num[8]; /* sequence number, needed by DTLS1 */
+       } SSL3_RECORD;
+
+typedef struct ssl3_buffer_st
+       {
+       unsigned char *buf;     /* at least SSL3_RT_MAX_PACKET_SIZE bytes,
+                                * see ssl3_setup_buffers() */
+       size_t len;             /* buffer size */
+       int offset;             /* where to 'copy from' */
+       int left;               /* how many bytes left */
+       } SSL3_BUFFER;
+
+#endif
+
+#define SSL3_CT_RSA_SIGN                       1
+#define SSL3_CT_DSS_SIGN                       2
+#define SSL3_CT_RSA_FIXED_DH                   3
+#define SSL3_CT_DSS_FIXED_DH                   4
+#define SSL3_CT_RSA_EPHEMERAL_DH               5
+#define SSL3_CT_DSS_EPHEMERAL_DH               6
+#define SSL3_CT_FORTEZZA_DMS                   20
+/* SSL3_CT_NUMBER is used to size arrays and it must be large
+ * enough to contain all of the cert types defined either for
+ * SSLv3 and TLSv1.
+ */
+#define SSL3_CT_NUMBER                 9
+
+
+#define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS      0x0001
+#define SSL3_FLAGS_DELAY_CLIENT_FINISHED       0x0002
+#define SSL3_FLAGS_POP_BUFFER                  0x0004
+#define TLS1_FLAGS_TLS_PADDING_BUG             0x0008
+#define TLS1_FLAGS_SKIP_CERT_VERIFY            0x0010
+#define TLS1_FLAGS_KEEP_HANDSHAKE              0x0020
+#define SSL3_FLAGS_CCS_OK                      0x0080
+/* SSL3_FLAGS_SGC_RESTART_DONE is set when we
+ * restart a handshake because of MS SGC and so prevents us
+ * from restarting the handshake in a loop. It's reset on a
+ * renegotiation, so effectively limits the client to one restart
+ * per negotiation. This limits the possibility of a DDoS
+ * attack where the client handshakes in a loop using SGC to
+ * restart. Servers which permit renegotiation can still be
+ * effected, but we can't prevent that.
+ */
+#define SSL3_FLAGS_SGC_RESTART_DONE            0x0040
+
+#ifndef OPENSSL_NO_SSL_INTERN
+
+typedef struct ssl3_state_st
+       {
+       long flags;
+       int delay_buf_pop_ret;
+
+       unsigned char read_sequence[8];
+       int read_mac_secret_size;
+       unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
+       unsigned char write_sequence[8];
+       int write_mac_secret_size;
+       unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
+
+       unsigned char server_random[SSL3_RANDOM_SIZE];
+       unsigned char client_random[SSL3_RANDOM_SIZE];
+
+       /* flags for countermeasure against known-IV weakness */
+       int need_empty_fragments;
+       int empty_fragment_done;
+
+       /* The value of 'extra' when the buffers were initialized */
+       int init_extra;
+
+       SSL3_BUFFER rbuf;       /* read IO goes into here */
+       SSL3_BUFFER wbuf;       /* write IO goes into here */
+
+       SSL3_RECORD rrec;       /* each decoded record goes in here */
+       SSL3_RECORD wrec;       /* goes out from here */
+
+       /* storage for Alert/Handshake protocol data received but not
+        * yet processed by ssl3_read_bytes: */
+       unsigned char alert_fragment[2];
+       unsigned int alert_fragment_len;
+       unsigned char handshake_fragment[4];
+       unsigned int handshake_fragment_len;
+
+       /* partial write - check the numbers match */
+       unsigned int wnum;      /* number of bytes sent so far */
+       int wpend_tot;          /* number bytes written */
+       int wpend_type;
+       int wpend_ret;          /* number of bytes submitted */
+       const unsigned char *wpend_buf;
+
+       /* used during startup, digest all incoming/outgoing packets */
+       BIO *handshake_buffer;
+       /* When set of handshake digests is determined, buffer is hashed
+        * and freed and MD_CTX-es for all required digests are stored in
+        * this array */
+       EVP_MD_CTX **handshake_dgst;
+       /* this is set whenerver we see a change_cipher_spec message
+        * come in when we are not looking for one */
+       int change_cipher_spec;
+
+       int warn_alert;
+       int fatal_alert;
+       /* we allow one fatal and one warning alert to be outstanding,
+        * send close alert via the warning alert */
+       int alert_dispatch;
+       unsigned char send_alert[2];
+
+       /* This flag is set when we should renegotiate ASAP, basically when
+        * there is no more data in the read or write buffers */
+       int renegotiate;
+       int total_renegotiations;
+       int num_renegotiations;
+
+       int in_read_app_data;
+
+       /* Opaque PRF input as used for the current handshake.
+        * These fields are used only if TLSEXT_TYPE_opaque_prf_input is defined
+        * (otherwise, they are merely present to improve binary compatibility) */
+       void *client_opaque_prf_input;
+       size_t client_opaque_prf_input_len;
+       void *server_opaque_prf_input;
+       size_t server_opaque_prf_input_len;
+
+       struct  {
+               /* actually only needs to be 16+20 */
+               unsigned char cert_verify_md[EVP_MAX_MD_SIZE*2];
+
+               /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
+               unsigned char finish_md[EVP_MAX_MD_SIZE*2];
+               int finish_md_len;
+               unsigned char peer_finish_md[EVP_MAX_MD_SIZE*2];
+               int peer_finish_md_len;
+
+               unsigned long message_size;
+               int message_type;
+
+               /* used to hold the new cipher we are going to use */
+               const SSL_CIPHER *new_cipher;
+#ifndef OPENSSL_NO_DH
+               DH *dh;
+#endif
+
+#ifndef OPENSSL_NO_ECDH
+               EC_KEY *ecdh; /* holds short lived ECDH key */
+#endif
+
+               /* used when SSL_ST_FLUSH_DATA is entered */
+               int next_state;                 
+
+               int reuse_message;
+
+               /* used for certificate requests */
+               int cert_req;
+               int ctype_num;
+               char ctype[SSL3_CT_NUMBER];
+               STACK_OF(X509_NAME) *ca_names;
+
+               int use_rsa_tmp;
+
+               int key_block_length;
+               unsigned char *key_block;
+
+               const EVP_CIPHER *new_sym_enc;
+               const EVP_MD *new_hash;
+               int new_mac_pkey_type;
+               int new_mac_secret_size;
+#ifndef OPENSSL_NO_COMP
+               const SSL_COMP *new_compression;
+#else
+               char *new_compression;
+#endif
+               int cert_request;
+               } tmp;
+
+        /* Connection binding to prevent renegotiation attacks */
+        unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
+        unsigned char previous_client_finished_len;
+        unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
+        unsigned char previous_server_finished_len;
+        int send_connection_binding; /* TODOEKR */
+
+#ifndef OPENSSL_NO_NEXTPROTONEG
+       /* Set if we saw the Next Protocol Negotiation extension from our peer. */
+       int next_proto_neg_seen;
+#endif
+
+#ifndef OPENSSL_NO_TLSEXT
+#ifndef OPENSSL_NO_EC
+       /* This is set to true if we believe that this is a version of Safari
+        * running on OS X 10.6 or newer. We wish to know this because Safari
+        * on 10.8 .. 10.8.3 has broken ECDHE-ECDSA support. */
+       char is_probably_safari;
+#endif /* !OPENSSL_NO_EC */
+#endif /* !OPENSSL_NO_TLSEXT */
+       } SSL3_STATE;
+
+#endif
+
+/* SSLv3 */
+/*client */
+/* extra state */
+#define SSL3_ST_CW_FLUSH               (0x100|SSL_ST_CONNECT)
+#ifndef OPENSSL_NO_SCTP
+#define DTLS1_SCTP_ST_CW_WRITE_SOCK                    (0x310|SSL_ST_CONNECT)
+#define DTLS1_SCTP_ST_CR_READ_SOCK                     (0x320|SSL_ST_CONNECT)
+#endif 
+/* write to server */
+#define SSL3_ST_CW_CLNT_HELLO_A                (0x110|SSL_ST_CONNECT)
+#define SSL3_ST_CW_CLNT_HELLO_B                (0x111|SSL_ST_CONNECT)
+/* read from server */
+#define SSL3_ST_CR_SRVR_HELLO_A                (0x120|SSL_ST_CONNECT)
+#define SSL3_ST_CR_SRVR_HELLO_B                (0x121|SSL_ST_CONNECT)
+#define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT)
+#define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT)
+#define SSL3_ST_CR_CERT_A              (0x130|SSL_ST_CONNECT)
+#define SSL3_ST_CR_CERT_B              (0x131|SSL_ST_CONNECT)
+#define SSL3_ST_CR_KEY_EXCH_A          (0x140|SSL_ST_CONNECT)
+#define SSL3_ST_CR_KEY_EXCH_B          (0x141|SSL_ST_CONNECT)
+#define SSL3_ST_CR_CERT_REQ_A          (0x150|SSL_ST_CONNECT)
+#define SSL3_ST_CR_CERT_REQ_B          (0x151|SSL_ST_CONNECT)
+#define SSL3_ST_CR_SRVR_DONE_A         (0x160|SSL_ST_CONNECT)
+#define SSL3_ST_CR_SRVR_DONE_B         (0x161|SSL_ST_CONNECT)
+/* write to server */
+#define SSL3_ST_CW_CERT_A              (0x170|SSL_ST_CONNECT)
+#define SSL3_ST_CW_CERT_B              (0x171|SSL_ST_CONNECT)
+#define SSL3_ST_CW_CERT_C              (0x172|SSL_ST_CONNECT)
+#define SSL3_ST_CW_CERT_D              (0x173|SSL_ST_CONNECT)
+#define SSL3_ST_CW_KEY_EXCH_A          (0x180|SSL_ST_CONNECT)
+#define SSL3_ST_CW_KEY_EXCH_B          (0x181|SSL_ST_CONNECT)
+#define SSL3_ST_CW_CERT_VRFY_A         (0x190|SSL_ST_CONNECT)
+#define SSL3_ST_CW_CERT_VRFY_B         (0x191|SSL_ST_CONNECT)
+#define SSL3_ST_CW_CHANGE_A            (0x1A0|SSL_ST_CONNECT)
+#define SSL3_ST_CW_CHANGE_B            (0x1A1|SSL_ST_CONNECT)
+#ifndef OPENSSL_NO_NEXTPROTONEG
+#define SSL3_ST_CW_NEXT_PROTO_A                (0x200|SSL_ST_CONNECT)
+#define SSL3_ST_CW_NEXT_PROTO_B                (0x201|SSL_ST_CONNECT)
+#endif
+#define SSL3_ST_CW_FINISHED_A          (0x1B0|SSL_ST_CONNECT)
+#define SSL3_ST_CW_FINISHED_B          (0x1B1|SSL_ST_CONNECT)
+/* read from server */
+#define SSL3_ST_CR_CHANGE_A            (0x1C0|SSL_ST_CONNECT)
+#define SSL3_ST_CR_CHANGE_B            (0x1C1|SSL_ST_CONNECT)
+#define SSL3_ST_CR_FINISHED_A          (0x1D0|SSL_ST_CONNECT)
+#define SSL3_ST_CR_FINISHED_B          (0x1D1|SSL_ST_CONNECT)
+#define SSL3_ST_CR_SESSION_TICKET_A    (0x1E0|SSL_ST_CONNECT)
+#define SSL3_ST_CR_SESSION_TICKET_B    (0x1E1|SSL_ST_CONNECT)
+#define SSL3_ST_CR_CERT_STATUS_A       (0x1F0|SSL_ST_CONNECT)
+#define SSL3_ST_CR_CERT_STATUS_B       (0x1F1|SSL_ST_CONNECT)
+
+/* server */
+/* extra state */
+#define SSL3_ST_SW_FLUSH               (0x100|SSL_ST_ACCEPT)
+#ifndef OPENSSL_NO_SCTP
+#define DTLS1_SCTP_ST_SW_WRITE_SOCK                    (0x310|SSL_ST_ACCEPT)
+#define DTLS1_SCTP_ST_SR_READ_SOCK                     (0x320|SSL_ST_ACCEPT)
+#endif 
+/* read from client */
+/* Do not change the number values, they do matter */
+#define SSL3_ST_SR_CLNT_HELLO_A                (0x110|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_CLNT_HELLO_B                (0x111|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_CLNT_HELLO_C                (0x112|SSL_ST_ACCEPT)
+/* write to client */
+#define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT)
+#define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_HELLO_REQ_A         (0x120|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_HELLO_REQ_B         (0x121|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_HELLO_REQ_C         (0x122|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_SRVR_HELLO_A                (0x130|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_SRVR_HELLO_B                (0x131|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_CERT_A              (0x140|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_CERT_B              (0x141|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_KEY_EXCH_A          (0x150|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_KEY_EXCH_B          (0x151|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_CERT_REQ_A          (0x160|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_CERT_REQ_B          (0x161|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_SRVR_DONE_A         (0x170|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_SRVR_DONE_B         (0x171|SSL_ST_ACCEPT)
+/* read from client */
+#define SSL3_ST_SR_CERT_A              (0x180|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_CERT_B              (0x181|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_KEY_EXCH_A          (0x190|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_KEY_EXCH_B          (0x191|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_CERT_VRFY_A         (0x1A0|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_CERT_VRFY_B         (0x1A1|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_CHANGE_A            (0x1B0|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_CHANGE_B            (0x1B1|SSL_ST_ACCEPT)
+#ifndef OPENSSL_NO_NEXTPROTONEG
+#define SSL3_ST_SR_NEXT_PROTO_A                (0x210|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_NEXT_PROTO_B                (0x211|SSL_ST_ACCEPT)
+#endif
+#define SSL3_ST_SR_FINISHED_A          (0x1C0|SSL_ST_ACCEPT)
+#define SSL3_ST_SR_FINISHED_B          (0x1C1|SSL_ST_ACCEPT)
+/* write to client */
+#define SSL3_ST_SW_CHANGE_A            (0x1D0|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_CHANGE_B            (0x1D1|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_FINISHED_A          (0x1E0|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_FINISHED_B          (0x1E1|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_SESSION_TICKET_A    (0x1F0|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_SESSION_TICKET_B    (0x1F1|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_CERT_STATUS_A       (0x200|SSL_ST_ACCEPT)
+#define SSL3_ST_SW_CERT_STATUS_B       (0x201|SSL_ST_ACCEPT)
+
+#define SSL3_MT_HELLO_REQUEST                  0
+#define SSL3_MT_CLIENT_HELLO                   1
+#define SSL3_MT_SERVER_HELLO                   2
+#define        SSL3_MT_NEWSESSION_TICKET               4
+#define SSL3_MT_CERTIFICATE                    11
+#define SSL3_MT_SERVER_KEY_EXCHANGE            12
+#define SSL3_MT_CERTIFICATE_REQUEST            13
+#define SSL3_MT_SERVER_DONE                    14
+#define SSL3_MT_CERTIFICATE_VERIFY             15
+#define SSL3_MT_CLIENT_KEY_EXCHANGE            16
+#define SSL3_MT_FINISHED                       20
+#define SSL3_MT_CERTIFICATE_STATUS             22
+#ifndef OPENSSL_NO_NEXTPROTONEG
+#define SSL3_MT_NEXT_PROTO                     67
+#endif
+#define DTLS1_MT_HELLO_VERIFY_REQUEST    3
+
+
+#define SSL3_MT_CCS                            1
+
+/* These are used when changing over to a new cipher */
+#define SSL3_CC_READ           0x01
+#define SSL3_CC_WRITE          0x02
+#define SSL3_CC_CLIENT         0x10
+#define SSL3_CC_SERVER         0x20
+#define SSL3_CHANGE_CIPHER_CLIENT_WRITE        (SSL3_CC_CLIENT|SSL3_CC_WRITE)  
+#define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER|SSL3_CC_READ)
+#define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT|SSL3_CC_READ)
+#define SSL3_CHANGE_CIPHER_SERVER_WRITE        (SSL3_CC_SERVER|SSL3_CC_WRITE)
+
+#ifdef  __cplusplus
+}
+#endif
+#endif
+