OSX/libsecurity_ssl/Security/sslContext.h

   1 /*
   2  * Copyright (c) 1999-2001,2005-2014 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  * sslContext.h - Private SSL typedefs: SSLContext and its components
  26  */
  27
  28 #ifndef _SSLCONTEXT_H_
  29 #define _SSLCONTEXT_H_ 1
  30
  31 #include "SecureTransport.h"
  32 #include "sslBuildFlags.h"
  33
  34 #include <tls_handshake.h>
  35 #include <tls_record.h>
  36 #include <tls_stream_parser.h>
  37
  38 #ifdef USE_CDSA_CRYPTO
  39 #include <Security/cssmtype.h>
  40 #else
  41 #if TARGET_OS_IPHONE
  42 #include <Security/SecDH.h>
  43 #include <Security/SecKeyInternal.h>
  44 #else
  45 #include "../sec/Security/SecDH.h"  // hack to get SecDH.
  46 // typedef struct OpaqueSecDHContext *SecDHContext;
  47 #endif
  48 #include <corecrypto/ccec.h>
  49 #endif
  50
  51 #include <CoreFoundation/CFRuntime.h>
  52 #include <AssertMacros.h>
  53
  54 #include "sslPriv.h"
  55 #include "sslRecord.h"
  56 #include "cipherSpecs.h"
  57
  58 #include <dispatch/dispatch.h>
  59
  60 #ifdef __cplusplus
  61 extern "C" {
  62 #endif
  63
  64 typedef struct
  65 {   SSLReadFunc         read;
  66     SSLWriteFunc        write;
  67     SSLConnectionRef    ioRef;
  68 } IOContext;
  69
  70 //FIXME should not need this.
  71 typedef enum
  72 {
  73     SSL_HdskStateUninit = 0,                    /* No Handshake yet */
  74     SSL_HdskStatePending,               /* Handshake in Progress */
  75     SSL_HdskStateReady,                 /* Handshake is done */
  76     SSL_HdskStateGracefulClose,
  77     SSL_HdskStateErrorClose,
  78     SSL_HdskStateNoNotifyClose,                 /* server disconnected with no
  79                                          *   notify msg */
  80 } SSLHandshakeState;
  81
  82 #define SSLChangeHdskState(ctx, newState) { ctx->state=newState; }
  83
  84 struct SSLContext
  85 {
  86         CFRuntimeBase           _base;
  87     IOContext           ioCtx;
  88
  89
  90     const struct SSLRecordFuncs *recFuncs;
  91     SSLRecordContextRef recCtx;
  92
  93     tls_handshake_t hdsk;
  94
  95     int readCipher_ready;
  96     int writeCipher_ready;
  97
  98     SSLHandshakeState   state;
  99
 100         /*
 101          * Prior to successful protocol negotiation, negProtocolVersion
 102          * is SSL_Version_Undetermined. Subsequent to successful
 103          * negotiation, negProtocolVersion contains the actual over-the-wire
 104          * protocol value.
 105          *
 106          * The Boolean versionEnable flags are set by
 107          * SSLSetProtocolVersionEnabled or SSLSetProtocolVersion and
 108          * remain invariant once negotiation has started. If there
 109          * were a large number of these and/or we were adding new
 110          * protocol versions on a regular basis, we'd probably want
 111          * to implement these as a word of flags. For now, in the
 112          * real world, this is the most straightforward implementation.
 113          */
 114     tls_protocol_version  negProtocolVersion;   /* negotiated */
 115     tls_protocol_version  clientReqProtocol;    /* requested by client in hello msg */
 116     tls_protocol_version  minProtocolVersion;
 117     tls_protocol_version  maxProtocolVersion;
 118     Boolean             isDTLS;             /* if this is a Datagram Context */
 119     SSLProtocolSide     protocolSide;           /* ConnectionEnd enum { server, client } in rfc5246. */
 120
 121     SSLBuffer           dtlsCookie;         /* DTLS ClientHello cookie */
 122
 123
 124     uint16_t            selectedCipher;         /* currently selected */
 125
 126
 127     tls_private_key_t   signingPrivKeyRef;  /* our private key */
 128
 129
 130     /* Server DH Parameters */
 131     SSLBuffer                   dhParamsEncoded;        /* PKCS3 encoded blob - prime + generator */
 132
 133     /*
 134          * Local and Peer cert chains.
 135          * For both, the root is the last in the chain.
 136          */
 137     SSLCertificate      *localCert;
 138     CFArrayRef          peerCert;
 139
 140         /*
 141          * The arrays we are given via SSLSetCertificate() and SSLSetEncryptionCertificate().
 142          * We keep them here, refcounted, solely for the associated getter.
 143          */
 144     CFArrayRef                  localCertArray;
 145     CFArrayRef                  encryptCertArray;
 146
 147         /* peer certs as SecTrustRef */
 148         SecTrustRef                     peerSecTrust;
 149
 150     CFMutableArrayRef   trustedCerts;
 151     Boolean             trustedCertsOnly;
 152
 153     /*
 154      * trusted leaf certs as specified in SSLSetTrustedLeafCertificates()
 155      */
 156     CFArrayRef                  trustedLeafCerts;
 157
 158         Boolean                                 allowExpiredCerts;
 159         Boolean                                 allowExpiredRoots;
 160         Boolean                                 enableCertVerify;
 161
 162     SSLBuffer               sessionID;
 163     SSLBuffer                   peerID;
 164     SSLBuffer                   resumableSession;       /* We keep a copy for now - but eventually this should go away if we get refcounted SSLBuffers */
 165
 166     uint16_t            *validCipherSuites;             /* context's valid suites */
 167     unsigned            numValidCipherSuites;   /* size of validCipherSuites */
 168
 169
 170     uint16_t            *ecdhCurves;
 171     unsigned            ecdhNumCurves;
 172
 173         /* server-side only */
 174     SSLAuthenticate             clientAuth;                             /* kNeverAuthenticate, etc. */
 175     //Boolean                           tryClientAuth;
 176
 177         /* client and server */
 178         SSLClientCertificateState       clientCertState;
 179
 180     DNListElem          *acceptableDNList;              /* client and server */
 181         CFMutableArrayRef       acceptableCAs;                  /* server only - SecCertificateRefs */
 182
 183     bool                certRequested;
 184     bool                certSent;
 185     bool                certReceived;
 186     bool                x509Requested;
 187
 188     unsigned            sessionMatch;
 189
 190
 191         /* Transport layer fields */
 192     SSLBuffer                   receivedDataBuffer;
 193     size_t              receivedDataPos;
 194
 195         Boolean                         allowAnyRoot;           // don't require known roots
 196         Boolean                         sentFatalAlert;         // this session terminated by fatal alert
 197         Boolean                         rsaBlindingEnable;
 198         Boolean                         oneByteRecordEnable;    /* enable 1/n-1 data splitting for TLSv1 and SSLv3 */
 199
 200         /* optional session cache timeout (in seconds) override - 0 means default */
 201         uint32_t                        sessionCacheTimeout;
 202
 203         /* optional SessionTicket */
 204         SSLBuffer                       sessionTicket;
 205
 206         /* optional callback to obtain master secret, with its opaque arg */
 207         SSLInternalMasterSecretFunction masterSecretCallback;
 208         const void                      *masterSecretArg;
 209
 210         #if     SSL_PAC_SERVER_ENABLE
 211         /* server PAC resume sets serverRandom early to allow for secret acquisition */
 212         uint8_t                         serverRandomValid;
 213         #endif
 214
 215         Boolean                         anonCipherEnable;
 216
 217         /* optional switches to enable additional returns from SSLHandshake */
 218     Boolean             breakOnServerAuth;
 219     Boolean             breakOnCertRequest;
 220     Boolean             breakOnClientAuth;
 221     Boolean             signalServerAuth;
 222     Boolean             signalCertRequest;
 223     Boolean             signalClientAuth;
 224     Boolean             breakOnClientHello;
 225
 226     /* List of peer-specified supported_signature_algorithms */
 227         unsigned                                         numPeerSigAlgs;
 228         const tls_signature_and_hash_algorithm *peerSigAlgs;
 229
 230         /* List of server-specified client auth types */
 231         unsigned                                        numAuthTypes;
 232         const tls_client_auth_type *clientAuthTypes;
 233
 234         /* client auth type actually negotiated */
 235         tls_client_auth_type    negAuthType;
 236
 237     /* Timeout for DTLS retransmit */
 238     CFAbsoluteTime      timeout_deadline;
 239     CFAbsoluteTime      timeout_duration;
 240     size_t              mtu;
 241
 242     /* RFC 5746: Secure renegotiation */
 243     Boolean             secure_renegotiation;
 244     Boolean             secure_renegotiation_received;
 245     SSLBuffer           ownVerifyData;
 246     SSLBuffer           peerVerifyData;
 247
 248     /* RFC 4279: TLS PSK */
 249     SSLBuffer           pskSharedSecret;
 250     SSLBuffer           pskIdentity;
 251
 252     /* TLS False Start */
 253     Boolean             falseStartEnabled; //FalseStart enabled (by API call)
 254     /* Fallback behavior */
 255     Boolean             fallbackEnabled; // Fallback behavior enabled.
 256     /* NPN */
 257     SSLNPNFunc      npnFunc;
 258     void            *npnFuncInfo;
 259
 260     /* ALPN */
 261     SSLALPNFunc     alpnFunc;
 262     void            *alpnFuncInfo;
 263
 264     /* Enable DHE or not */
 265     bool            dheEnabled;
 266
 267     /* For early failure reporting */
 268     bool    serverHelloReceived;
 269 };
 270
 271 OSStatus SSLUpdateNegotiatedClientAuthType(SSLContextRef ctx);
 272
 273 Boolean sslIsSessionActive(const SSLContext *ctx);
 274
 275 static inline bool sslVersionIsLikeTls12(SSLContext *ctx)
 276 {
 277     check(ctx->negProtocolVersion!=SSL_Version_Undetermined);
 278     return ctx->isDTLS ? ctx->negProtocolVersion > DTLS_Version_1_0 : ctx->negProtocolVersion >= TLS_Version_1_2;
 279 }
 280
 281 /* This is implemented in tls_callbacks.c */
 282     int sslGetSessionID(SSLContext *myCtx, SSLBuffer *sessionID);
 283
 284 #ifdef __cplusplus
 285 }
 286 #endif
 287
 288 #endif /* _SSLCONTEXT_H_ */