OSX/libsecurity_ssl/security_ssl/sslRecord.c

   1 /*
   2  * Copyright (c) 1999-2001,2005-2007,2010-2014 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25  * sslRecord.c - Encryption, decryption and MACing of data
  26 */
  27
  28 #include <SecureTransport.h>
  29 #include "ssl.h"
  30 #include "sslRecord.h"
  31 #include "sslMemory.h"
  32 #include "sslContext.h"
  33 #include "sslDebug.h"
  34 #include "sslUtils.h"
  35 #include "SSLRecordInternal.h"
  36
  37 #include <string.h>
  38 #include <assert.h>
  39
  40 #include <utilities/SecIOFormat.h>
  41
  42 /*
  43  * Lots of servers fail to provide closure alerts when they disconnect.
  44  * For now we'll just accept it as long as it occurs on a clean record boundary
  45  * (and the handshake is complete).
  46  */
  47 #define SSL_ALLOW_UNNOTICED_DISCONNECT  1
  48
  49
  50 static OSStatus errorTranslate(int recordErr)
  51 {
  52     switch(recordErr) {
  53         case errSecSuccess:
  54             return errSecSuccess;
  55         case errSSLRecordInternal:
  56             return errSSLInternal;
  57         case errSSLRecordWouldBlock:
  58             return errSSLWouldBlock;
  59         case errSSLRecordProtocol:
  60             return errSSLProtocol;
  61         case errSSLRecordNegotiation:
  62             return errSSLNegotiation;
  63         case errSSLRecordClosedAbort:
  64             return errSSLClosedAbort;
  65         case errSSLRecordConnectionRefused:
  66             return errSSLConnectionRefused;
  67         case errSSLRecordDecryptionFail:
  68             return errSSLDecryptionFail;
  69         case errSSLRecordBadRecordMac:
  70             return errSSLBadRecordMac;
  71         case errSSLRecordRecordOverflow:
  72             return errSSLRecordOverflow;
  73         case errSSLRecordUnexpectedRecord:
  74             return errSSLUnexpectedRecord;
  75         default:
  76             sslErrorLog("unknown error code returned in sslErrorTranslate: %d\n", recordErr);
  77             return recordErr;
  78     }
  79 }
  80
  81 /* SSLWriteRecord
  82  *  Attempt to encrypt and queue an SSL record.
  83  */
  84 OSStatus
  85 SSLWriteRecord(SSLRecord rec, SSLContext *ctx)
  86 {
  87     OSStatus    err;
  88
  89     err=errorTranslate(ctx->recFuncs->write(ctx->recCtx, rec));
  90
  91     switch(err) {
  92         case errSecSuccess:
  93             break;
  94         default:
  95             sslErrorLog("unexpected error code returned in SSLWriteRecord: %d\n", (int)err);
  96             break;
  97     }
  98
  99     return err;
 100 }
 101
 102 /* SSLFreeRecord
 103  *  Free a record returned by SSLReadRecord.
 104  */
 105 OSStatus
 106 SSLFreeRecord(SSLRecord rec, SSLContext *ctx)
 107 {
 108     return ctx->recFuncs->free(ctx->recCtx, rec);
 109 }
 110
 111 /* SSLReadRecord
 112  *  Attempt to read & decrypt an SSL record.
 113  *  Record content should be freed using SSLFreeRecord
 114  */
 115 OSStatus
 116 SSLReadRecord(SSLRecord *rec, SSLContext *ctx)
 117 {
 118     return errorTranslate(ctx->recFuncs->read(ctx->recCtx, rec));
 119 }
 120
 121 OSStatus SSLServiceWriteQueue(SSLContext *ctx)
 122 {
 123     return errorTranslate(ctx->recFuncs->serviceWriteQueue(ctx->recCtx));
 124 }