--- /dev/null
+/*
+ * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
+ *
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please obtain
+ * a copy of the License at http://www.apple.com/publicsource and read it before
+ * using this file.
+ *
+ * This Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
+ * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
+ * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
+ * specific language governing rights and limitations under the License.
+ */
+
+
+/* *********************************************************************
+ File: sslAlertMessage.cpp - SSL3 Alert protocol
+ ****************************************************************** */
+
+#include "ssl.h"
+#include "sslAlertMessage.h"
+#include "sslMemory.h"
+#include "sslContext.h"
+#include "sslSession.h"
+#include "sslDebug.h"
+
+#include <assert.h>
+
+#ifdef NDEBUG
+#define SSLLogAlertMsg(msg,sent)
+#else
+static void SSLLogAlertMsg(AlertDescription msg, bool sent);
+#endif
+
+OSStatus
+SSLProcessAlert(SSLRecord rec, SSLContext *ctx)
+{ OSStatus err = noErr;
+ AlertLevel level;
+ AlertDescription desc;
+ uint8 *charPtr;
+ uint32 remaining;
+
+ if (rec.contents.length % 2 != 0)
+ {
+ err = SSLFatalSessionAlert(SSL_AlertIllegalParam, ctx);
+ if (!err) {
+ err = errSSLProtocol;
+ }
+ return err;
+ }
+
+ charPtr = rec.contents.data;
+ remaining = rec.contents.length;
+ while (remaining > 0)
+ { level = (AlertLevel)*charPtr++;
+ desc = (AlertDescription)*charPtr++;
+ sslHdskMsgDebug("alert msg recieved level %d desc %d\n",
+ (int)level, (int)desc);
+ remaining -= 2;
+ SSLLogAlertMsg(desc, false);
+
+ /*
+ * Ignore sessionID-related failures here;
+ * the important thing is the alert.
+ */
+ if (level == SSL_AlertLevelFatal)
+ {
+ SSLDeleteSessionData(ctx);
+ sslErrorLog("***Fatal alert %d received\n", desc);
+ return errSSLFatalAlert;
+ }
+
+ switch (desc)
+ { case SSL_AlertUnexpectedMsg:
+ case SSL_AlertBadRecordMac:
+ case SSL_AlertDecompressFail:
+ case SSL_AlertHandshakeFail:
+ case SSL_AlertIllegalParam:
+ /* These must always be fatal; if we got here, the level is warning;
+ * die anyway
+ */
+ SSLDeleteSessionData(ctx);
+ err = errSSLFatalAlert;
+ break;
+ case SSL_AlertCloseNotify:
+ SSLClose(ctx);
+ err = noErr;
+ break;
+ case SSL_AlertNoCert:
+ if((ctx->state == SSL_HdskStateClientCert) &&
+ (ctx->protocolSide == SSL_ServerSide) &&
+ (ctx->clientAuth != kAlwaysAuthenticate)) {
+ /*
+ * Tolerate this unless we're configured to
+ * *require* a client cert. If a client cert is
+ * required, we'll catch the error at the next
+ * handshake msg we receive - which will probably
+ * be a client key exchange msg, which is illegal
+ * when we're in state SSL_HdskStateClientCert.
+ * If the client cert is optional, advance to
+ * state ClientKeyExchange by pretending we
+ * just got a client cert msg.
+ */
+ if ((err = SSLAdvanceHandshake(SSL_HdskCert,
+ ctx)) != 0) {
+ return err;
+ }
+ }
+ break;
+ case SSL_AlertBadCert:
+ case SSL_AlertUnsupportedCert:
+ case SSL_AlertCertRevoked:
+ case SSL_AlertCertExpired:
+ case SSL_AlertCertUnknown:
+ err = noErr;
+ break;
+ default:
+ /* Unknown alert, but not fatal; ignore it */
+ break;
+ }
+ }
+
+ return err;
+}
+
+OSStatus
+SSLSendAlert(AlertLevel level, AlertDescription desc, SSLContext *ctx)
+{ SSLRecord rec;
+ OSStatus err;
+
+ assert((ctx->negProtocolVersion != SSL_Version_2_0));
+
+ if ((err = SSLEncodeAlert(rec, level, desc, ctx)) != 0)
+ return err;
+ assert(ctx->sslTslCalls != NULL);
+ SSLLogAlertMsg(desc, true);
+ if ((err = ctx->sslTslCalls->writeRecord(rec, ctx)) != 0)
+ return err;
+ if ((err = SSLFreeBuffer(rec.contents, ctx)) != 0)
+ return err;
+
+ return noErr;
+}
+
+OSStatus
+SSLEncodeAlert(SSLRecord &rec, AlertLevel level, AlertDescription desc, SSLContext *ctx)
+{ OSStatus err;
+
+ rec.contentType = SSL_RecordTypeAlert;
+ assert((ctx->negProtocolVersion != SSL_Version_2_0));
+ if(ctx->negProtocolVersion == SSL_Version_Undetermined) {
+ /* error while negotiating */
+ rec.protocolVersion = ctx->maxProtocolVersion;
+ }
+ else {
+ rec.protocolVersion = ctx->negProtocolVersion;
+ }
+ rec.contents.length = 2;
+ if ((err = SSLAllocBuffer(rec.contents, 2, ctx)) != 0)
+ return err;
+ rec.contents.data[0] = level;
+ rec.contents.data[1] = desc;
+
+ return noErr;
+}
+
+OSStatus
+SSLFatalSessionAlert(AlertDescription desc, SSLContext *ctx)
+{ OSStatus err1, err2;
+
+ if(desc != SSL_AlertCloseNotify) {
+ sslErrorLog("SSLFatalSessionAlert: desc %d\n", desc);
+ }
+ SSLChangeHdskState(ctx, SSL_HdskStateErrorClose);
+
+ /* Make session unresumable; I'm not stopping if I get an error,
+ because I'd like to attempt to send the alert anyway */
+ err1 = SSLDeleteSessionData(ctx);
+
+ /* Second, send the alert */
+ err2 = SSLSendAlert(SSL_AlertLevelFatal, desc, ctx);
+
+ /* If they both returned errors, arbitrarily return the first */
+ return err1 != 0 ? err1 : err2;
+}
+
+#ifndef NDEBUG
+
+/* log alert messages */
+
+static char *alertMsgToStr(AlertDescription msg)
+{
+ static char badStr[100];
+
+ switch(msg) {
+ case SSL_AlertCloseNotify:
+ return "SSL_AlertCloseNotify";
+ case SSL_AlertUnexpectedMsg:
+ return "SSL_AlertUnexpectedMsg";
+ case SSL_AlertBadRecordMac:
+ return "SSL_AlertBadRecordMac";
+ case SSL_AlertDecryptionFail:
+ return "SSL_AlertDecryptionFail";
+ case SSL_AlertRecordOverflow:
+ return "SSL_AlertRecordOverflow";
+ case SSL_AlertDecompressFail:
+ return "SSL_AlertDecompressFail";
+ case SSL_AlertHandshakeFail:
+ return "SSL_AlertHandshakeFail";
+ case SSL_AlertNoCert:
+ return "SSL_AlertNoCert";
+ case SSL_AlertBadCert:
+ return "SSL_AlertBadCert";
+ case SSL_AlertUnsupportedCert:
+ return "SSL_AlertUnsupportedCert";
+ case SSL_AlertCertRevoked:
+ return "SSL_AlertCertRevoked";
+
+ case SSL_AlertCertExpired:
+ return "SSL_AlertCertExpired";
+ case SSL_AlertCertUnknown:
+ return "SSL_AlertCertUnknown";
+ case SSL_AlertIllegalParam:
+ return "SSL_AlertIllegalParam";
+ case SSL_AlertUnknownCA:
+ return "SSL_AlertUnknownCA";
+ case SSL_AlertAccessDenied:
+ return "SSL_AlertAccessDenied";
+ case SSL_AlertDecodeError:
+ return "SSL_AlertDecodeError";
+ case SSL_AlertDecryptError:
+ return "SSL_AlertDecryptError";
+
+ case SSL_AlertExportRestriction:
+ return "SSL_AlertExportRestriction";
+ case SSL_AlertProtocolVersion:
+ return "SSL_AlertProtocolVersion";
+ case SSL_AlertInsufficientSecurity:
+ return "SSL_AlertInsufficientSecurity";
+ case SSL_AlertInternalError:
+ return "SSL_AlertInternalError";
+ case SSL_AlertUserCancelled:
+ return "SSL_AlertUserCancelled";
+ case SSL_AlertNoRenegotiation:
+ return "SSL_AlertNoRenegotiation";
+
+ default:
+ sprintf(badStr, "Unknown state (%d(d)", msg);
+ return badStr;
+ }
+}
+
+static void SSLLogAlertMsg(AlertDescription msg, bool sent)
+{
+ sslHdskMsgDebug("---%s alert msg %s",
+ alertMsgToStr(msg), (sent ? "sent" : "recv"));
+}
+
+#endif /* NDEBUG */
projects / apple / security.git / blobdiff