SecureTransport/sslutil.c

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 /*
  20         File:           sslutil.c
  21
  22         Contains:       Misc. SSL utility functions
  23
  24         Written by:     Doug Mitchell, based on Netscape SSLRef 3.0
  25
  26         Copyright: (c) 1999 by Apple Computer, Inc., all rights reserved.
  27
  28 */
  29 /*  *********************************************************************
  30     File: sslutil.c
  31
  32     SSLRef 3.0 Final -- 11/19/96
  33
  34     Copyright (c)1996 by Netscape Communications Corp.
  35
  36     By retrieving this software you are bound by the licensing terms
  37     disclosed in the file "LICENSE.txt". Please read it, and if you don't
  38     accept the terms, delete this software.
  39
  40     SSLRef 3.0 was developed by Netscape Communications Corp. of Mountain
  41     View, California <http://home.netscape.com/> and Consensus Development
  42     Corporation of Berkeley, California <http://www.consensus.com/>.
  43
  44     *********************************************************************
  45
  46     File: sslutil.c    Utility functions for encoding structures
  47
  48     Handles encoding endian-independant wire representation of 2, 3, or 4
  49     byte integers.
  50
  51     ****************************************************************** */
  52
  53 #ifndef _SSLCTX_H_
  54 #include "sslctx.h"
  55 #endif
  56
  57 #ifndef _SSLUTIL_H_
  58 #include "sslutil.h"
  59 #endif
  60
  61 #ifndef _SSLALLOC_H_
  62 #include "sslalloc.h"
  63 #endif
  64
  65 #ifndef _SSL_DEBUG_H_
  66 #include "sslDebug.h"
  67 #endif
  68
  69 #include <CoreServices/../Frameworks/CarbonCore.framework/Headers/MacTypes.h>
  70
  71 UInt32
  72 SSLDecodeInt(const unsigned char *p, int length)
  73 {   UInt32  val = 0;
  74     while (length--)
  75         val = (val << 8) | *p++;
  76     return val;
  77 }
  78
  79 unsigned char *
  80 SSLEncodeInt(unsigned char *p, UInt32 value, int length)
  81 {   unsigned char   *retVal = p + length;       /* Return pointer to char after int */
  82     CASSERT(length > 0 && length <= 4);
  83     while (length--)                /* Assemble backwards */
  84     {   p[length] = (UInt8)value;   /* Implicit masking to low byte */
  85         value >>= 8;
  86     }
  87     return retVal;
  88 }
  89
  90 void
  91 IncrementUInt64(sslUint64 *v)
  92 {   if (++v->low == 0)          /* Must have just rolled over */
  93         ++v->high;
  94 }
  95
  96 UInt32
  97 SSLGetCertificateChainLength(const SSLCertificate *c)
  98 {
  99         UInt32 rtn = 0;
 100
 101     while (c)
 102     {
 103         rtn++;
 104         c = c->next;
 105     }
 106     return rtn;
 107 }
 108
 109 Boolean sslIsSessionActive(const SSLContext *ctx)
 110 {
 111         CASSERT(ctx != NULL);
 112         switch(ctx->state) {
 113                 case SSLUninitialized:
 114                 case HandshakeServerUninit:
 115                 case HandshakeClientUninit:
 116                 case SSLGracefulClose:
 117                 case SSLErrorClose:
 118                         return false;
 119                 default:
 120                         return true;
 121         }
 122 }
 123
 124 OSStatus sslDeleteCertificateChain(
 125     SSLCertificate              *certs,
 126         SSLContext                      *ctx)
 127 {
 128         SSLCertificate          *cert;
 129         SSLCertificate          *nextCert;
 130
 131         CASSERT(ctx != NULL);
 132         cert=certs;
 133         while(cert != NULL) {
 134                 nextCert = cert->next;
 135                 SSLFreeBuffer(&cert->derCert, &ctx->sysCtx);
 136                 sslFree(cert);
 137                 cert = nextCert;
 138         }
 139         return noErr;
 140 }
 141
 142 #if     SSL_DEBUG
 143
 144 const char *protocolVersStr(SSLProtocolVersion prot)
 145 {
 146         switch(prot) {
 147         case SSL_Version_Undetermined: return "SSL_Version_Undetermined";
 148         case SSL_Version_3_0_With_2_0_Hello: return "SSL_Version_3_0_With_2_0_Hello";
 149         case SSL_Version_3_0_Only: return "SSL_Version_3_0_Only";
 150         case SSL_Version_2_0: return "SSL_Version_2_0";
 151         case SSL_Version_3_0: return "SSL_Version_3_0";
 152         default: sslPanic("protocolVersStr: bad prot");
 153         }
 154         return NULL;    /* NOT REACHED */
 155 }
 156
 157 #endif  /* SSL_DEBUG */