OSX/libsecurity_ssl/lib/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 "SSLRecordInternal.h"
  35
  36 #include <string.h>
  37
  38 #include <utilities/SecIOFormat.h>
  39
  40 /*
  41  * Lots of servers fail to provide closure alerts when they disconnect.
  42  * For now we'll just accept it as long as it occurs on a clean record boundary
  43  * (and the handshake is complete).
  44  */
  45 #define SSL_ALLOW_UNNOTICED_DISCONNECT  1
  46
  47
  48 static OSStatus errorTranslate(int recordErr)
  49 {
  50     switch(recordErr) {
  51         case errSecSuccess:
  52             return errSecSuccess;
  53         case errSSLRecordInternal:
  54             return errSSLInternal;
  55         case errSSLRecordWouldBlock:
  56             return errSSLWouldBlock;
  57         case errSSLRecordProtocol:
  58             return errSSLProtocol;
  59         case errSSLRecordNegotiation:
  60             return errSSLNegotiation;
  61         case errSSLRecordClosedAbort:
  62             return errSSLClosedAbort;
  63         case errSSLRecordConnectionRefused:
  64             return errSSLConnectionRefused;
  65         case errSSLRecordDecryptionFail:
  66             return errSSLDecryptionFail;
  67         case errSSLRecordBadRecordMac:
  68             return errSSLBadRecordMac;
  69         case errSSLRecordRecordOverflow:
  70             return errSSLRecordOverflow;
  71         case errSSLRecordUnexpectedRecord:
  72             return errSSLUnexpectedRecord;
  73         default:
  74             sslErrorLog("unknown error code returned in sslErrorTranslate: %d\n", recordErr);
  75             return recordErr;
  76     }
  77 }
  78
  79 /* SSLWriteRecord
  80  *  Attempt to encrypt and queue an SSL record.
  81  */
  82 OSStatus
  83 SSLWriteRecord(SSLRecord rec, SSLContext *ctx)
  84 {
  85     OSStatus    err;
  86
  87     err=errorTranslate(ctx->recFuncs->write(ctx->recCtx, rec));
  88
  89     switch(err) {
  90         case errSecSuccess:
  91             break;
  92         default:
  93             sslErrorLog("unexpected error code returned in SSLWriteRecord: %d\n", (int)err);
  94             break;
  95     }
  96
  97     return err;
  98 }
  99
 100 /* SSLFreeRecord
 101  *  Free a record returned by SSLReadRecord.
 102  */
 103 OSStatus
 104 SSLFreeRecord(SSLRecord rec, SSLContext *ctx)
 105 {
 106     return ctx->recFuncs->free(ctx->recCtx, rec);
 107 }
 108
 109 /* SSLReadRecord
 110  *  Attempt to read & decrypt an SSL record.
 111  *  Record content should be freed using SSLFreeRecord
 112  */
 113 OSStatus
 114 SSLReadRecord(SSLRecord *rec, SSLContext *ctx)
 115 {
 116     return errorTranslate(ctx->recFuncs->read(ctx->recCtx, rec));
 117 }
 118
 119 OSStatus SSLServiceWriteQueue(SSLContext *ctx)
 120 {
 121     return errorTranslate(ctx->recFuncs->serviceWriteQueue(ctx->recCtx));
 122 }