ca_adapter_net_ssl.c 98.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
/******************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 *
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ******************************************************************/

Oleksii Beketov's avatar
Oleksii Beketov committed
21

Dave Thaler's avatar
Dave Thaler committed
22
#include "iotivity_config.h"
Oleksii Beketov's avatar
Oleksii Beketov committed
23

Jaewook Jung's avatar
Jaewook Jung committed
24
#ifndef _GNU_SOURCE
25
#define _GNU_SOURCE
Jaewook Jung's avatar
Jaewook Jung committed
26
#endif
27 28 29

#include <stddef.h>
#include <stdbool.h>
30
#include <assert.h>
31
#include <inttypes.h>
32 33 34
#include "ca_adapter_net_ssl.h"
#include "cacommon.h"
#include "caipinterface.h"
35
#include "cacertprofile.h"
36
#include "oic_malloc.h"
37
#include "utlist.h"
38
#include "experimental/ocrandom.h"
39
#include "experimental/byte_array.h"
40
#include "octhread.h"
41
#include "octimer.h"
42 43
#include "utlist.h"
#include "parsechain.h"
44 45 46 47 48 49 50 51

// headers required for mbed TLS
#include "mbedtls/platform.h"
#include "mbedtls/ssl.h"
#include "mbedtls/entropy.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/pkcs12.h"
#include "mbedtls/ssl_internal.h"
52
#include "mbedtls/net_sockets.h"
Kevin Kane's avatar
Kevin Kane committed
53
#include "mbedtls/oid.h"
Oleksandr Dmytrenko's avatar
Oleksandr Dmytrenko committed
54 55
#include "mbedtls/x509.h"
#include "mbedtls/error.h"
56 57 58 59 60
#ifdef __WITH_DTLS__
#include "mbedtls/timing.h"
#include "mbedtls/ssl_cookie.h"
#endif

61
#if !defined(NDEBUG) || defined(TB_LOG)
62 63 64 65
#include "mbedtls/debug.h"
#include "mbedtls/version.h"
#endif

Dave Thaler's avatar
Dave Thaler committed
66
#ifdef HAVE_SYS_TYPES_H
67
#include <sys/types.h>
Dave Thaler's avatar
Dave Thaler committed
68 69
#endif
#ifdef HAVE_SYS_STAT_H
70
#include <sys/stat.h>
Dave Thaler's avatar
Dave Thaler committed
71 72
#endif
#ifdef HAVE_FCNTL_H
73
#include <fcntl.h>
Dave Thaler's avatar
Dave Thaler committed
74 75
#endif
#ifdef HAVE_UNISTD_H
76 77 78 79 80 81 82 83
#include <unistd.h>
#endif

/**
 * @def MBED_TLS_VERSION_LEN
 * @brief mbedTLS version string length
 */
#define MBED_TLS_VERSION_LEN (16)
84 85 86
 /**
 * @def PERSONALIZATION_STRING
 * @brief Personalization string for the mbedtls RNG
87
 */
88
#define PERSONALIZATION_STRING "IOTIVITY_RND"
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107
/**
 * @def USERID_PREFIX
 * @brief userid prefix in certificate alternative subject name field
 */
#define USERID_PREFIX "userid:"

/**
 * @def NET_SSL_TAG
 * @brief Logging tag for module name
 */
#define NET_SSL_TAG "OIC_CA_NET_SSL"
/**
 * @def MBED_TLS_TAG
 * @brief Logging tag for mbedTLS library
 */
#define MBED_TLS_TAG "MBED_TLS"
/**
 * @def MMBED_TLS_DEBUG_LEVEL
 * @brief Logging level for mbedTLS library
108
 * Level 1 logs errors only, level 4 is verbose logging.
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138
 */
#define MBED_TLS_DEBUG_LEVEL (4)

/**
 * @def TLS_MSG_BUF_LEN
 * @brief Buffer size for TLS record. A single TLS record may be up to 16384 octets in length
 */

#define TLS_MSG_BUF_LEN (16384)
/**
 * @def PSK_LENGTH
 * @brief PSK keys max length
 */
#define PSK_LENGTH (256/8)
/**
 * @def UUID_LENGTHPSK_LENGTH
 * @brief Identity max length
 */
#define UUID_LENGTH (128/8)
/**
 * @def MASTER_SECRET_LEN
 * @brief TLS master secret length
 */
#define MASTER_SECRET_LEN (48)
/**
 * @def RANDOM_LEN
 * @brief TLS client and server random bytes length
 */
#define RANDOM_LEN (32)
/**
Oleksii Beketov's avatar
Oleksii Beketov committed
139 140
 * @def SHA384_MAC_KEY_LENGTH
 * @brief MAC key length for SHA384 cipher suites
141
 */
Oleksii Beketov's avatar
Oleksii Beketov committed
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
#define SHA384_MAC_KEY_LENGTH (48)
/**
 * @def SHA256_MAC_KEY_LENGTH
 * @brief MAC key length for SHA256 cipher suites
 */
#define SHA256_MAC_KEY_LENGTH (32)
/**
 * @def CCM_MAC_KEY_LENGTH
 * @brief MAC key length for CCM cipher suites
 */
#define CCM_MAC_KEY_LENGTH (0)
/**
 * @def AES256_KEY_LENGTH
 * @brief key material length for AES256 cipher suites
 */
#define AES256_KEY_LENGTH (32)
/**
 * @def AES128_KEY_LENGTH
 * @brief key material length for AES128 cipher suites
 */
#define AES128_KEY_LENGTH (16)
/**
 * @def GCM_IV_LENGTH
 * @brief length of nonce for GCM cipher suites
166
 */
Oleksii Beketov's avatar
Oleksii Beketov committed
167 168 169 170 171 172 173 174 175 176 177
#define GCM_IV_LENGTH (12)
/**
 * @def CCM_IV_LENGTH
 * @brief length of nonce for CCM cipher suites
 */
#define CCM_IV_LENGTH (4)
/**
 * @def CBC_IV_LENGTH
 * @brief length of nonce for CBC cipher suites
 */
#define CBC_IV_LENGTH (0)
Chul Lee's avatar
Chul Lee committed
178 179 180 181 182 183 184

/**
 * @var RETRANSMISSION_TIME
 * @brief Maximum timeout value (in seconds) to start DTLS retransmission.
 */
#define RETRANSMISSION_TIME 1

Oleksii Beketov's avatar
Oleksii Beketov committed
185 186 187 188 189 190 191
/**@def SSL_CLOSE_NOTIFY(peer, ret)
 *
 * Notifies of existing \a peer about closing TLS connection.
 *
 * @param[in] peer remote peer
 * @param[in] ret used internaly
 */
192 193 194 195 196 197
#define SSL_CLOSE_NOTIFY(peer, ret)                                                                \
do                                                                                                 \
{                                                                                                  \
    (ret) = mbedtls_ssl_close_notify(&(peer)->ssl);                                                \
} while (MBEDTLS_ERR_SSL_WANT_WRITE == (ret))

198 199 200 201 202 203
/* OCF-defined EKU value indicating an identity certificate, that can be used for
 * TLS client and server authentication.  This is the DER encoding of the OID
 * 1.3.6.1.4.1.44924.1.6.
 */
static const unsigned char EKU_IDENTITY[] = { 0x2B, 0x06, 0x01, 0x04, 0x01, 0x82, 0xDE, 0x7C, 0x01, 0x06 };

Oleksii Beketov's avatar
Oleksii Beketov committed
204 205 206 207 208 209 210 211 212 213
/**@def CONF_SSL(clientConf, serverConf, fn, ...)
 *
 * Calls \a fn for \a clientConf and \a serverConf.
 *
 */
#define CONF_SSL(clientConf, serverConf, fn, ...) do {                                             \
fn((clientConf), __VA_ARGS__);                                                                     \
fn((serverConf), __VA_ARGS__);                                                                     \
} while (0)

214 215 216 217 218
/** @def CHECK_MBEDTLS_RET(f, ...)
 * A macro that checks \a f function return code
 *
 * If function returns error code it goes to error processing.
 *
George Nash's avatar
George Nash committed
219 220 221
 * **IMPORTANT:** Any time CHECK_MBEDTLS_RET is used an `exit:` goto label must
 *                be present to handle error processing.
 *
222 223 224 225 226 227 228
 * @param[in] f  Function to call
 */
#define CHECK_MBEDTLS_RET(f, ...) do {                                                             \
int ret = (f)(__VA_ARGS__);                                                                        \
if (0 != ret) {                                                                                    \
    OIC_LOG_V(ERROR, NET_SSL_TAG, "%s returned -0x%04x\n", __func__, -(ret));                      \
    goto exit;                                                                                     \
Oleksii Beketov's avatar
Oleksii Beketov committed
229
} } while (0)
230 231 232

typedef enum
{
Oleksii Beketov's avatar
Oleksii Beketov committed
233 234 235 236 237 238 239 240 241 242 243 244 245
    SSL_RSA_WITH_AES_256_CBC_SHA256,
    SSL_RSA_WITH_AES_128_GCM_SHA256,
    SSL_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
    SSL_ECDHE_ECDSA_WITH_AES_128_CCM_8,
    SSL_ECDHE_ECDSA_WITH_AES_128_CCM,
    SSL_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
    SSL_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
    SSL_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
    SSL_ECDHE_PSK_WITH_AES_128_CBC_SHA256,
    SSL_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
    SSL_ECDH_ANON_WITH_AES_128_CBC_SHA256,
    SSL_CIPHER_MAX
} SslCipher_t;
246 247 248 249 250 251 252

typedef enum
{
    ADAPTER_CURVE_SECP256R1,
    ADAPTER_CURVE_MAX
} AdapterCurve_t;

Oleksii Beketov's avatar
Oleksii Beketov committed
253
static const int tlsCipher[SSL_CIPHER_MAX][2] =
254
{
Oleksii Beketov's avatar
Oleksii Beketov committed
255 256 257
    {MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA256, 0},
    {MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256, 0},
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 0},
258
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8, 0},
Chul Lee's avatar
Chul Lee committed
259
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM, 0},
Oleksii Beketov's avatar
Oleksii Beketov committed
260 261 262 263 264 265
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, 0},
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, 0},
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, 0},
    {MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256, 0},
    {MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, 0},
    {MBEDTLS_TLS_ECDH_ANON_WITH_AES_128_CBC_SHA256, 0}
266 267
};

Oleksii Beketov's avatar
Oleksii Beketov committed
268
static int g_cipherSuitesList[SSL_CIPHER_MAX];
269 270 271 272 273 274 275 276

mbedtls_ecp_group_id curve[ADAPTER_CURVE_MAX][2] =
{
    {MBEDTLS_ECP_DP_SECP256R1, MBEDTLS_ECP_DP_NONE}
};

typedef struct  {
    int code;
277
    unsigned char alert;
278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303
} CrtVerifyAlert_t;

static const CrtVerifyAlert_t crtVerifyAlerts[] = {
    {MBEDTLS_X509_BADCERT_EXPIRED,       MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED},
    {MBEDTLS_X509_BADCERT_REVOKED,       MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED},
    {MBEDTLS_X509_BADCERT_CN_MISMATCH,   MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN},
    {MBEDTLS_X509_BADCERT_NOT_TRUSTED,   MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA},
    {MBEDTLS_X509_BADCRL_NOT_TRUSTED,    MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA},
    {MBEDTLS_X509_BADCRL_EXPIRED,        MBEDTLS_SSL_ALERT_MSG_INSUFFICIENT_SECURITY},
    {MBEDTLS_X509_BADCERT_MISSING,       MBEDTLS_SSL_ALERT_MSG_NO_CERT},
    {MBEDTLS_X509_BADCERT_SKIP_VERIFY,   MBEDTLS_SSL_ALERT_MSG_INSUFFICIENT_SECURITY},
    {MBEDTLS_X509_BADCERT_OTHER,         MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR},
    {MBEDTLS_X509_BADCERT_FUTURE,        MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCRL_FUTURE,         MBEDTLS_SSL_ALERT_MSG_INSUFFICIENT_SECURITY},
    {MBEDTLS_X509_BADCERT_KEY_USAGE,     MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCERT_EXT_KEY_USAGE, MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCERT_NS_CERT_TYPE,  MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCERT_BAD_MD,        MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCERT_BAD_PK,        MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCERT_BAD_KEY,       MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCRL_BAD_MD,         MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCRL_BAD_PK,         MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {MBEDTLS_X509_BADCRL_BAD_KEY,        MBEDTLS_SSL_ALERT_MSG_BAD_CERT},
    {0, 0}
};

304
static unsigned char GetAlertCode(uint32_t flags)
305 306 307 308 309 310 311 312 313 314 315 316 317
{
    const CrtVerifyAlert_t *cur;

    for (cur = crtVerifyAlerts; cur->alert != 0 ; cur++)
    {
        if (flags & cur->code)
        {
            return cur->alert;
        }
    }
    return 0;
}

318
#if !defined(NDEBUG) || defined(TB_LOG)
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334
/**
 * Pass a message to the OIC logger.
 *
 * @param[in] ctx  opaque context for the callback
 * @param[in] level  debug level
 * @param[in] file  file name
 * @param[in] line  line number
 * @param[in] str  message
 */
static void DebugSsl(void *ctx, int level, const char *file, int line, const char *str)
{
    ((void) level);
    ((void) file);
    ((void) line);
    ((void) ctx);

Dmitriy Zhuravlev's avatar
Dmitriy Zhuravlev committed
335 336 337 338 339 340 341
    char * temp = (char*) str;
    size_t len = strlen(temp);
    if (1 <= len && temp[len - 1] == '\n')
    {
        temp[len - 1] = '\0';
    }

342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358
    OIC_LOG_V(DEBUG, MBED_TLS_TAG, "%s", str);
}
#endif

/**
 * structure to holds the information of cache message and address info.
 */
typedef ByteArray_t SslCacheMessage_t;


/**
 * Data structure for holding the send and recv callbacks.
 */
typedef struct TlsCallBacks
{
    CAPacketReceivedCallback recvCallback;  /**< Callback used to send data to upper layer. */
    CAPacketSendCallback sendCallback;      /**< Callback used to send data to socket layer. */
359
    CAErrorHandleCallback errorCallback;    /**< Callback used to pass error to upper layer. */
360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378
} SslCallbacks_t;

/**
 * Data structure for holding the mbedTLS interface related info.
 */
typedef struct SslContext
{
    u_arraylist_t *peerList;         /**< peer list which holds the mapping between
                                              peer id, it's n/w address and mbedTLS context. */
    mbedtls_entropy_context entropy;
    mbedtls_ctr_drbg_context rnd;
    mbedtls_x509_crt ca;
    mbedtls_x509_crt crt;
    mbedtls_pk_context pkey;

    mbedtls_ssl_config clientTlsConf;
    mbedtls_ssl_config serverTlsConf;
    mbedtls_ssl_config clientDtlsConf;
    mbedtls_ssl_config serverDtlsConf;
Chul Lee's avatar
Chul Lee committed
379

Oleksii Beketov's avatar
Oleksii Beketov committed
380
    SslCipher_t cipher;
381 382 383 384 385
    SslCallbacks_t adapterCallbacks[MAX_SUPPORTED_ADAPTERS];
    mbedtls_x509_crl crl;
    bool cipherFlag[2];
    int selectedCipher;

386
#ifdef __WITH_DTLS__
387
    mbedtls_ssl_cookie_ctx cookieCtx;
388 389 390
    int timerId;
#endif

391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414
} SslContext_t;

/**
 * @var g_caSslContext
 * @brief global context which holds tls context and cache list information.
 */
static SslContext_t * g_caSslContext = NULL;

/**
 * @var g_getCredentialsCallback
 * @brief callback to get TLS credentials (same as for DTLS)
 */
static CAgetPskCredentialsHandler g_getCredentialsCallback = NULL;
/**
 * @var g_getCerdentilTypesCallback
 * @brief callback to get different credential types from SRM
 */
static CAgetCredentialTypesHandler g_getCredentialTypesCallback = NULL;
/**
 * @var g_getPkixInfoCallback
 *
 * @brief callback to get X.509-based Public Key Infrastructure
 */
static CAgetPkixInfoHandler g_getPkixInfoCallback = NULL;
415 416 417 418 419 420
/**
 * @var g_getIdentityCallback
 *
 * @brief callback to retrieve acceptable UUID list
 */
static CAgetIdentityHandler g_getIdentityCallback = NULL;
421 422 423 424 425 426
/**
 * @var g_closeSslConnectionCallback
 *
 * @brief callback to retrieve UUID on SSL connection closure
 */
static CAcloseSslConnectionCallback g_closeSslConnectionCallback = NULL;
427 428 429

/**
 * @var g_dtlsContextMutex
430
 * @brief Mutex to synchronize access to g_caSslContext and g_sslCallback.
431 432 433 434 435 436 437
 */
static oc_mutex g_sslContextMutex = NULL;

/**
 * @var g_sslCallback
 * @brief callback to deliver the TLS handshake result
 */
438
static CAHandshakeErrorCallback g_sslCallback = NULL;
439

440 441 442 443 444 445 446
/**
 * @var g_peerCNVerifyCallback
 *
 * @brief callback to utilize peer certificate information
 */
static PeerCNVerifyCallback g_peerCNVerifyCallback = NULL;

447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468
/**
 * Data structure for holding the data to be received.
 */
typedef struct SslRecBuf
{
    uint8_t * buff;
    size_t len;
    size_t loaded;
} SslRecBuf_t;
/**
 * Data structure for holding the data related to endpoint
 * and TLS session.
 */
typedef struct SslEndPoint
{
    mbedtls_ssl_context ssl;
    CASecureEndpoint_t sep;
    u_arraylist_t * cacheList;
    SslRecBuf_t recBuf;
    uint8_t master[MASTER_SECRET_LEN];
    uint8_t random[2*RANDOM_LEN];
#ifdef __WITH_DTLS__
Chul Lee's avatar
Chul Lee committed
469 470
    mbedtls_timing_delay_context timer;
#endif // __WITH_DTLS__
471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486
} SslEndPoint_t;

void CAsetPskCredentialsCallback(CAgetPskCredentialsHandler credCallback)
{
    // TODO Does this method needs protection of tlsContextMutex?
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    g_getCredentialsCallback = credCallback;
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}

void CAsetPkixInfoCallback(CAgetPkixInfoHandler infoCallback)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    g_getPkixInfoCallback = infoCallback;
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}
487

488 489 490 491 492 493 494
void CAsetIdentityCallback(CAgetIdentityHandler identityCallback)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    g_getIdentityCallback = identityCallback;
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}

495 496 497 498 499 500 501
void CAsetCredentialTypesCallback(CAgetCredentialTypesHandler credTypesCallback)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    g_getCredentialTypesCallback = credTypesCallback;
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}

502 503 504 505 506 507 508 509 510 511 512
void CAsetPeerCNVerifyCallback(PeerCNVerifyCallback cb)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "IN %s", __func__);
    if (NULL == cb)
    {
        OIC_LOG(DEBUG, NET_SSL_TAG, "UNSET peerCNVerifyCallback");
    }
    g_peerCNVerifyCallback = cb;
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "OUT %s", __func__);
}

513 514 515 516 517 518 519
void CAsetCloseSslConnectionCallback(CAcloseSslConnectionCallback closeSslCallback)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    g_closeSslConnectionCallback = closeSslCallback;
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}

520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537
/**
 * Sets SSL result for callback.
 *
 * @param[in] peer remote peer
 */
static CAResult_t notifySubscriber(SslEndPoint_t* peer, CAResult_t status)
{
    CAResult_t result = CA_STATUS_OK;
    oc_mutex_assert_owner(g_sslContextMutex, true);
    if (g_sslCallback)
    {
        CAErrorInfo_t errorInfo;
        errorInfo.result = status;
        result = g_sslCallback(&peer->sep.endpoint, &errorInfo);
    }
    return result;
}

538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574
static CAResult_t PeerCertExtractCN(const mbedtls_x509_crt *peerCert)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "IN %s", __func__);

    CAResult_t res = CA_STATUS_OK;

    mbedtls_asn1_named_data *subject = (mbedtls_asn1_named_data *)&(peerCert->subject);
    while (NULL != subject)
    {
        if (0 == MBEDTLS_OID_CMP(MBEDTLS_OID_AT_CN, &(subject->oid)))
        {
            break;
        }
        subject = subject->next;
    }

    if (NULL != g_peerCNVerifyCallback)
    {
        if (NULL != subject)
        {
            res = g_peerCNVerifyCallback(subject->val.p, subject->val.len);
        }
        else
        {
            OIC_LOG(DEBUG, NET_SSL_TAG, "Common Name not found");
            res = g_peerCNVerifyCallback(NULL, 0);
        }
    }
    else
    {
        OIC_LOG(DEBUG, NET_SSL_TAG, "g_peerCNVerifyCallback is not set");
    }

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "OUT %s", __func__);
    return res;
}

575 576 577 578 579 580 581 582
static int GetAdapterIndex(CATransportAdapter_t adapter)
{
    switch (adapter)
    {
        case CA_ADAPTER_IP:
            return 0;
        case CA_ADAPTER_TCP:
            return 1;
583 584
        case CA_ADAPTER_GATT_BTLE:
            return 2;
585 586 587 588 589
        default:
            OIC_LOG(ERROR, NET_SSL_TAG, "Unsupported adapter");
            return -1;
    }
}
590 591 592

static void SendCacheMessages(SslEndPoint_t * tep, CAResult_t errorCode);

593 594 595 596 597 598 599
/**
 * Write callback.
 *
 * @param[in]  tep    TLS endpoint
 * @param[in]  data    message
 * @param[in]  dataLen    message length
 *
600
 * @return  message length or -1 on error.
601 602 603 604
 */
static int SendCallBack(void * tep, const unsigned char * data, size_t dataLen)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
605 606
    VERIFY_NON_NULL_RET(tep, NET_SSL_TAG, "secure endpoint is NULL", -1);
    VERIFY_NON_NULL_RET(data, NET_SSL_TAG, "data is NULL", -1);
607
    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", -1);
608
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Data len: %" PRIuPTR, dataLen);
609
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Adapter: %u", ((SslEndPoint_t * )tep)->sep.endpoint.adapter);
610
    ssize_t sentLen = 0;
611
    int adapterIndex = GetAdapterIndex(((SslEndPoint_t * )tep)->sep.endpoint.adapter);
612
    if (0 <= adapterIndex && MAX_SUPPORTED_ADAPTERS > adapterIndex)
613
    {
614
        size_t dataToSend = (dataLen > INT_MAX) ? INT_MAX : dataLen;
615
        CAPacketSendCallback sendCallback = g_caSslContext->adapterCallbacks[adapterIndex].sendCallback;
616
        sentLen = sendCallback(&(((SslEndPoint_t * )tep)->sep.endpoint), (const void *) data, dataToSend);
617 618 619 620 621
        if (0 > sentLen)
        {
            OIC_LOG(ERROR, NET_SSL_TAG, "Error sending packet. The error will be reported in the adapter.");
        }
        else if ((size_t)sentLen != dataLen)
622 623
        {
            OIC_LOG_V(DEBUG, NET_SSL_TAG,
624
                      "Packet was partially sent - sent/total/remained bytes : %" PRIdPTR "/%" PRIuPTR "/%" PRIuPTR,
625 626
                      sentLen, dataLen, (dataLen - sentLen));
        }
627 628 629 630
    }
    else
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Unsupported adapter");
631
        return -1;
632 633 634
    }

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
635
    return (int)sentLen;
636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
}
/**
 * Read callback.
 *
 * @param[in]  tep    TLS endpoint
 * @param[in]  data    message
 * @param[in]  dataLen    message length
 *
 * @return  read length
 */
static int RecvCallBack(void * tep, unsigned char * data, size_t dataLen)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_RET(tep, NET_SSL_TAG, "endpoint is NULL", 0);
    VERIFY_NON_NULL_RET(data, NET_SSL_TAG, "data is NULL", 0);

    SslRecBuf_t *recBuf = &((SslEndPoint_t *)tep)->recBuf;
653 654
    size_t retLen = ((recBuf->len > recBuf->loaded) ? (recBuf->len - recBuf->loaded) : 0);
    retLen = (retLen < dataLen) ? retLen : dataLen;
655

656 657 658 659 660
    if (retLen > INT_MAX)
    {
        return 0;
    }

661 662 663 664 665 666 667
    memcpy(data, recBuf->buff + recBuf->loaded, retLen);
    recBuf->loaded += retLen;

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return (int)retLen;
}

668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683
/**
 * Deinit Pki Info
 *
 * @param[out] inf structure with certificate, private key and crl to be free.
 *
 */
static void DeInitPkixInfo(PkiInfo_t * inf)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    if (NULL == inf)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "NULL passed");
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
        return;
    }

684
    FreeCertChain(&(inf->crt));
685
    DEINIT_BYTE_ARRAY(inf->key);
686
    FreeCertChain(&(inf->ca));
687 688 689 690 691
    DEINIT_BYTE_ARRAY(inf->crl);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}

692 693 694 695 696
//Loads PKIX related information from SRM
static int InitPKIX(CATransportAdapter_t adapter)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_RET(g_getPkixInfoCallback, NET_SSL_TAG, "PKIX info callback is NULL", -1);
697
    // load pk key, cert, trust chain and crl
698
    PkiInfo_t pkiInfo = {
699
        CERT_CHAIN_INITIALIZER,
700
        BYTE_ARRAY_INITIALIZER,
701
        CERT_CHAIN_INITIALIZER,
702 703 704
        BYTE_ARRAY_INITIALIZER
    };

705 706
    if (g_getPkixInfoCallback)
    {
707
        g_getPkixInfoCallback(&pkiInfo);
708 709
    }
    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", -1);
710 711 712 713 714 715 716 717 718 719

    mbedtls_x509_crt_free(&g_caSslContext->ca);
    mbedtls_x509_crt_free(&g_caSslContext->crt);
    mbedtls_pk_free(&g_caSslContext->pkey);
    mbedtls_x509_crl_free(&g_caSslContext->crl);

    mbedtls_x509_crt_init(&g_caSslContext->ca);
    mbedtls_x509_crt_init(&g_caSslContext->crt);
    mbedtls_pk_init(&g_caSslContext->pkey);
    mbedtls_x509_crl_init(&g_caSslContext->crl);
720 721
    mbedtls_ssl_config * serverConf = (adapter == CA_ADAPTER_IP ||
                                   adapter == CA_ADAPTER_GATT_BTLE ?
722
                                   &g_caSslContext->serverDtlsConf : &g_caSslContext->serverTlsConf);
723 724
    mbedtls_ssl_config * clientConf = (adapter == CA_ADAPTER_IP ||
                                   adapter == CA_ADAPTER_GATT_BTLE ?
725 726
                                   &g_caSslContext->clientDtlsConf : &g_caSslContext->clientTlsConf);
    // optional
Oleksii Beketov's avatar
Oleksii Beketov committed
727 728
    int ret;
    int errNum;
729
    int count = ParseChain(&g_caSslContext->crt, &(pkiInfo.crt), &errNum);
Oleksii Beketov's avatar
Oleksii Beketov committed
730
    if (0 >= count)
731 732 733 734
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "Own certificate chain parsing error");
        goto required;
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
735 736 737 738 739
    if (0 != errNum)
    {
        OIC_LOG_V(WARNING, NET_SSL_TAG, "Own certificate chain parsing error: %d certs failed to parse", errNum);
        goto required;
    }
740 741 742 743 744 745 746 747 748 749 750 751 752

    ret = ValidateAuthCertChainProfiles(&g_caSslContext->crt);
    if (CP_INVALID_CERT_CHAIN == ret)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Invalid own cert chain");
        goto required;
    }
    else if (0 != ret)
    {
        OIC_LOG_V(ERROR, NET_SSL_TAG, "%d certificate(s) in own cert chain do not satisfy OCF profile requirements", ret);
        goto required;
    }

753
    ret =  mbedtls_pk_parse_key(&g_caSslContext->pkey, pkiInfo.key.data, pkiInfo.key.len,
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773
                                                                               NULL, 0);
    if (0 != ret)
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "Key parsing error");
        goto required;
    }

    ret = mbedtls_ssl_conf_own_cert(serverConf, &g_caSslContext->crt, &g_caSslContext->pkey);
    if (0 != ret)
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "Own certificate parsing error");
        goto required;
    }
    ret = mbedtls_ssl_conf_own_cert(clientConf, &g_caSslContext->crt, &g_caSslContext->pkey);
    if(0 != ret)
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "Own certificate configuration error");
        goto required;
    }

774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
    /* If we get here, certificates could be used, so configure OCF EKUs. */
    ret = mbedtls_ssl_conf_ekus(serverConf, (const char*)EKU_IDENTITY, sizeof(EKU_IDENTITY),
        (const char*)EKU_IDENTITY, sizeof(EKU_IDENTITY));
    if (0 == ret)
    {
        ret = mbedtls_ssl_conf_ekus(clientConf, (const char*)EKU_IDENTITY, sizeof(EKU_IDENTITY),
            (const char*)EKU_IDENTITY, sizeof(EKU_IDENTITY));
    }
    if (0 != ret)
    {
        /* Cert-based ciphersuites will fail, but if PSK ciphersuites are in
         * the list they might work, so don't return error.
         */
        OIC_LOG(WARNING, NET_SSL_TAG, "EKU configuration error");
    }

790
    required:
791
    count = ParseChain(&g_caSslContext->ca, &(pkiInfo.ca), &errNum);
Oleksii Beketov's avatar
Oleksii Beketov committed
792
    if(0 >= count)
793 794 795
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "CA chain parsing error");
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
796
        DeInitPkixInfo(&pkiInfo);
797 798
        return -1;
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
799 800 801 802
    if(0 != errNum)
    {
        OIC_LOG_V(WARNING, NET_SSL_TAG, "CA chain parsing warning: %d certs failed to parse", errNum);
    }
803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820
    else
    {
        ret = ValidateRootCACertListProfiles(&g_caSslContext->ca);
        if (CP_INVALID_CERT_LIST == ret)
        {
            OIC_LOG(ERROR, NET_SSL_TAG, "Invalid own CA cert chain");
            OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
            DeInitPkixInfo(&pkiInfo);
            return -1;
        }
        else if (0 < ret )
        {
            OIC_LOG_V(ERROR, NET_SSL_TAG, "%d certificate(s) in own CA cert chain violate OCF Root CA cert profile requirements", ret);
            OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
            DeInitPkixInfo(&pkiInfo);
            return -1;
        }
    }
821

822
    ret = mbedtls_x509_crl_parse_der(&g_caSslContext->crl, pkiInfo.crl.data, pkiInfo.crl.len);
823 824 825
    if(0 != ret)
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "CRL parsing error");
Oleksii Beketov's avatar
Oleksii Beketov committed
826
        CONF_SSL(clientConf, serverConf, mbedtls_ssl_conf_ca_chain, &g_caSslContext->ca, NULL);
827 828 829
    }
    else
    {
Oleksii Beketov's avatar
Oleksii Beketov committed
830 831
        CONF_SSL(clientConf, serverConf, mbedtls_ssl_conf_ca_chain,
                 &g_caSslContext->ca, &g_caSslContext->crl);
832 833
    }

834 835
    DeInitPkixInfo(&pkiInfo);

836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return 0;
}

/*
 * PSK callback.
 *
 * @param[in]  notUsed     opaque context
 * @param[in]  ssl    mbedTLS context
 * @param[in]  desc    identity
 * @param[in]  descLen    identity length
 *
 * @return  0 on success any other return value will result in a denied PSK identity
 */
static int GetPskCredentialsCallback(void * notUsed, mbedtls_ssl_context * ssl,
                                     const unsigned char * desc, size_t descLen)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_RET(g_getCredentialsCallback, NET_SSL_TAG, "Credential callback s NULL", -1);
    VERIFY_NON_NULL_RET(ssl, NET_SSL_TAG, "ssl pointer is NULL", -1);
    VERIFY_NON_NULL_RET(desc, NET_SSL_TAG, "desc pointer is NULL", -1);
857 858 859
    VERIFY_TRUE_RET((descLen <= CA_MAX_ENDPOINT_IDENTITY_LEN), NET_SSL_TAG,
                    "desc too long!", -1);

860 861 862 863 864 865 866 867
    (void) notUsed;
    uint8_t keyBuf[PSK_LENGTH] = {0};

    // Retrieve the credentials blob from security module
    int ret = g_getCredentialsCallback(CA_DTLS_PSK_KEY, desc, descLen, keyBuf, PSK_LENGTH);
    if (ret > 0)
    {
        memcpy(((SslEndPoint_t *) ssl)->sep.identity.id, desc, descLen);
868
        ((SslEndPoint_t *) ssl)->sep.identity.id_length = (uint16_t)descLen;
869 870 871
        OIC_LOG(DEBUG, NET_SSL_TAG, "PSK:");
        OIC_LOG_BUFFER(DEBUG, NET_SSL_TAG, keyBuf, ret);

872 873 874
        OIC_LOG(DEBUG, NET_SSL_TAG, "Identity:");
        OIC_LOG_BUFFER(DEBUG, NET_SSL_TAG, desc, descLen);

875 876 877 878 879 880 881 882 883 884 885 886 887 888 889
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
        return(mbedtls_ssl_set_hs_psk(ssl, keyBuf, ret));
    }
    OIC_LOG_V(WARNING, NET_SSL_TAG, "Out %s", __func__);
    return -1;
}
/**
 * Gets session corresponding for endpoint.
 *
 * @param[in]  peer    remote address
 *
 * @return  TLS session or NULL
 */
static SslEndPoint_t *GetSslPeer(const CAEndpoint_t *peer)
{
890 891
    size_t listIndex = 0;
    size_t listLength = 0;
892
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
893 894 895

    oc_mutex_assert_owner(g_sslContextMutex, true);

896
    VERIFY_NON_NULL_RET(peer, NET_SSL_TAG, "TLS peer is NULL", NULL);
897
    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", NULL);
898 899 900 901 902 903 904 905 906 907

    SslEndPoint_t *tep = NULL;
    listLength = u_arraylist_length(g_caSslContext->peerList);
    for (listIndex = 0; listIndex < listLength; listIndex++)
    {
        tep = (SslEndPoint_t *) u_arraylist_get(g_caSslContext->peerList, listIndex);
        if (NULL == tep)
        {
            continue;
        }
908 909 910 911 912 913 914 915

        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Compare [%s:%d] and [%s:%d] for %d adapter",
                  peer->addr, peer->port, tep->sep.endpoint.addr, tep->sep.endpoint.port,
                  peer->adapter);

        if((peer->adapter == tep->sep.endpoint.adapter)
                && (0 == strncmp(peer->addr, tep->sep.endpoint.addr, MAX_ADDR_STR_SIZE_CA))
                && (peer->port == tep->sep.endpoint.port || CA_ADAPTER_GATT_BTLE == peer->adapter))
916 917 918 919 920 921 922 923 924
        {
            OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
            return tep;
        }
    }
    OIC_LOG(DEBUG, NET_SSL_TAG, "Return NULL");
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return NULL;
}
925 926

/**
927
 * Gets a copy of CA secure endpoint info corresponding for endpoint.
928 929
 *
 * @param[in]  peer    remote address
930
 * @param[out] sep     copy of secure endpoint data
931
 *
932
 * @return  CA_STATUS_OK on success; other error code on failure
933
 */
934
CAResult_t GetCASecureEndpointData(const CAEndpoint_t* peer, CASecureEndpoint_t* sep)
935 936 937 938
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);

    oc_mutex_lock(g_sslContextMutex);
939

940 941 942 943
    if (NULL == g_caSslContext)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Context is NULL");
        oc_mutex_unlock(g_sslContextMutex);
944
        return CA_STATUS_NOT_INITIALIZED;
945 946 947
    }

    SslEndPoint_t* sslPeer = GetSslPeer(peer);
948
    if (sslPeer)
949
    {
950 951
        // sslPeer could be destroyed after releasing the lock, so make a copy
        // of the endpoint information before releasing the lock.
952
        memcpy(sep, &sslPeer->sep, sizeof(sslPeer->sep));
953
        oc_mutex_unlock(g_sslContextMutex);
954 955

        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
956
        return CA_STATUS_OK;
957 958 959
    }

    oc_mutex_unlock(g_sslContextMutex);
960 961 962

    OIC_LOG(DEBUG, NET_SSL_TAG, "GetSslPeer returned NULL");
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
963
    return CA_STATUS_INVALID_PARAM;
964 965
}

966 967 968 969 970 971 972 973 974 975 976 977 978 979 980
/**
 * Adds a bit to the attributes field of a secure endpoint.
 *
 * @param[in]  peer         remote address
 * @param[in]  newAttribute bit to be added to the attributes field
 *
 * @return  true if the secure endpoint has been found, false otherwise.
 */
bool SetCASecureEndpointAttribute(const CAEndpoint_t* peer, uint32_t newAttribute)
{
    bool result = false;

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s(peer = %s:%u, attribute = %#x)", __func__,
        peer->addr, (uint32_t)peer->port, newAttribute);

981
    // In the current implementation, the caller already owns g_sslContextMutex.
982
    oc_mutex_assert_owner(g_sslContextMutex, true);
983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021

    if (NULL == g_caSslContext)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Context is NULL");
    }
    else
    {
        SslEndPoint_t* sslPeer = GetSslPeer(peer);

        if (!sslPeer)
        {
            OIC_LOG(ERROR, NET_SSL_TAG, "SSL peer not found");
        }
        else
        {
            sslPeer->sep.attributes |= newAttribute;
            result = true;
        }
    }

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s -> %s", __func__, result ? "success" : "failed");
    return result;
}

/**
 * Gets the attributes field of a secure endpoint.
 *
 * @param[in]  peer          remote address
 * @param[out] allAttributes all the attributes bits for that remote address
 *
 * @return  true if the secure endpoint has been found, false otherwise.
 */
bool GetCASecureEndpointAttributes(const CAEndpoint_t* peer, uint32_t* allAttributes)
{
    bool result = false;

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s(peer = %s:%u)", __func__,
        peer->addr, (uint32_t)peer->port);

1022 1023
    // In the current implementation, the caller doesn't own g_sslContextMutex.
    oc_mutex_assert_owner(g_sslContextMutex, false);
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
    oc_mutex_lock(g_sslContextMutex);

    if (NULL == g_caSslContext)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Context is NULL");
    }
    else
    {
        SslEndPoint_t* sslPeer = GetSslPeer(peer);

        if (!sslPeer)
        {
            OIC_LOG(ERROR, NET_SSL_TAG, "SSL peer not found");
        }
        else
        {
            *allAttributes = sslPeer->sep.attributes;
            result = true;
        }
    }

    oc_mutex_unlock(g_sslContextMutex);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s -> %s, attributes = %#x", __func__,
        result ? "success" : "failed", result ? *allAttributes : 0);
    return result;
}

1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
/**
 * Deletes cached message.
 *
 * @param[in]  msg    message
 */
static void DeleteCacheMessage(SslCacheMessage_t * msg)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_VOID(msg, NET_SSL_TAG, "msg");

    OICFree(msg->data);
    OICFree(msg);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}
/**
 * Deletes cached message list.
 *
 * @param[in] cacheList  list of cached messages
 */
static void DeleteCacheList(u_arraylist_t * cacheList)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_VOID(cacheList, NET_SSL_TAG, "cacheList");
1076 1077
    size_t listIndex = 0;
    size_t listLength = 0;
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091

    listLength = u_arraylist_length(cacheList);
    for (listIndex = 0; listIndex < listLength; listIndex++)
    {
        SslCacheMessage_t * msg = (SslCacheMessage_t *) u_arraylist_get(cacheList, listIndex);
        if (NULL != msg)
        {
            DeleteCacheMessage(msg);
        }
    }
    u_arraylist_free(&cacheList);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}
1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102

static CAResult_t ConvertMbedtlsCodesToCAResult(int code)
{
    //TODO:properly implement
    switch (code)
    {
        case 0:  return CA_STATUS_OK;
        default: return CA_DTLS_AUTHENTICATION_FAILURE;
    }
}

1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
/**
 * Deletes endpoint with session.
 *
 * @param[in]  tep    endpoint with session info
 */
static void DeleteSslEndPoint(SslEndPoint_t * tep)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_VOID(tep, NET_SSL_TAG, "tep");

    mbedtls_ssl_free(&tep->ssl);
    DeleteCacheList(tep->cacheList);
    OICFree(tep);
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
}
/**
 * Removes endpoint session from list.
 *
 * @param[in]  endpoint    remote address
 */
static void RemovePeerFromList(CAEndpoint_t * endpoint)
{
1125 1126
    oc_mutex_assert_owner(g_sslContextMutex, true);

1127
    VERIFY_NON_NULL_VOID(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL");
1128
    VERIFY_NON_NULL_VOID(endpoint, NET_SSL_TAG, "endpoint");
1129

1130 1131
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
    for (size_t listIndex = 0; listIndex < listLength; listIndex++)
1132
    {
1133
        SslEndPoint_t * tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, listIndex);
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
        if (NULL == tep)
        {
            continue;
        }
        if(0 == strncmp(endpoint->addr, tep->sep.endpoint.addr, MAX_ADDR_STR_SIZE_CA)
                && (endpoint->port == tep->sep.endpoint.port))
        {
            u_arraylist_remove(g_caSslContext->peerList, listIndex);
            DeleteSslEndPoint(tep);
            return;
        }
    }
}
1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164

 /**
  * Checks handshake result. Removes peer from list and sends alert
  * if handshake failed.
  *
  * @param[in] peer Remote peer's endpoint.
  * @param[in] ret  Error code.
  * @param[in] str  Debug string.
  * @param[in] msg  Alert message.
  *
  * @return - "true" if the SSL handshake was successful.
  *         - "false" otherwise.
  */
static bool checkSslOperation(SslEndPoint_t*  peer,
                              int ret,
                              const char* str,
                              unsigned char msg)
{
1165
    OC_UNUSED(str);
1166
    OC_UNUSED(msg);
1167

1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
    if ((0 != ret) &&
        (MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY != ret) &&
        (MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED != ret) &&
        (MBEDTLS_ERR_SSL_WANT_READ != ret) &&
        (MBEDTLS_ERR_SSL_WANT_WRITE != ret) &&
        (MBEDTLS_ERR_SSL_NON_FATAL != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_USER_CANCELED != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_NO_CERT != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_BAD_CERT != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_INAPROPRIATE_FALLBACK != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_UNRECOGNIZED_NAME != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_UNKNOWN_PSK_IDENTITY != ret) &&
        (MBEDTLS_SSL_ALERT_MSG_NO_APPLICATION_PROTOCOL != ret))
    {
Oleksii Beketov's avatar
Oleksii Beketov committed
1189
        if (MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO == ret)
Oleksandr Dmytrenko's avatar
Oleksandr Dmytrenko committed
1190
        {
Oleksii Beketov's avatar
Oleksii Beketov committed
1191 1192 1193 1194 1195
            unsigned char *buf = peer->ssl.in_hdr;
            if (buf[0] == 0x15)
            {
                OIC_LOG_V(INFO, NET_SSL_TAG, "encrypted alert message received");
            }
Oleksandr Dmytrenko's avatar
Oleksandr Dmytrenko committed
1196 1197 1198
        }
        else
        {
Oleksii Beketov's avatar
Oleksii Beketov committed
1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210
            size_t bufSize = 1024;
            char *bufMsg = (char*)OICCalloc(1, bufSize);
            if (bufMsg)
            {
                mbedtls_strerror(ret, bufMsg, bufSize);
                OIC_LOG_V(ERROR, NET_SSL_TAG, "%s: 0x%X: %s", __func__, -ret, bufMsg);
                OICFree(bufMsg);
            }
            else
            {
                OIC_LOG_V(ERROR, NET_SSL_TAG, "%s: -0x%x", (str), -ret);
            }
Oleksandr Dmytrenko's avatar
Oleksandr Dmytrenko committed
1211
        }
1212 1213

        // Make a copy of the endpoint, because the callback might
1214
        // free the peer object, during notifySubscriber() below.
1215 1216
        CAEndpoint_t removedEndpoint = (peer)->sep.endpoint;

1217
        oc_mutex_lock(g_sslContextMutex);
1218 1219 1220

        if (MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO != ret)
        {
1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232
            CAResult_t result = notifySubscriber(peer, CA_DTLS_AUTHENTICATION_FAILURE);

            //return an error to app layer
            if (MBEDTLS_SSL_IS_CLIENT == peer->ssl.conf->endpoint)
            {
                if (CA_STATUS_OK == result)
                {
                    result = ConvertMbedtlsCodesToCAResult(ret);
                }

                SendCacheMessages(peer, result);
            }
1233 1234
        }

1235
        RemovePeerFromList(&removedEndpoint);
1236 1237

        oc_mutex_unlock(g_sslContextMutex);
1238 1239 1240 1241 1242 1243
        return false;
    }

    return true;
}

1244 1245 1246
/**
 * Deletes session list.
 */
1247
static void DeletePeerList(void)
1248
{
1249 1250
    oc_mutex_assert_owner(g_sslContextMutex, true);

1251 1252
    VERIFY_NON_NULL_VOID(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL");

1253 1254
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
    for (size_t listIndex = 0; listIndex < listLength; listIndex++)
1255
    {
1256
        SslEndPoint_t * tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, listIndex);
1257 1258 1259 1260
        if (NULL == tep)
        {
            continue;
        }
Dmitriy Zhuravlev's avatar
Dmitriy Zhuravlev committed
1261 1262 1263 1264 1265 1266 1267 1268 1269
        if (MBEDTLS_SSL_HANDSHAKE_OVER == tep->ssl.state)
        {
            int ret = 0;
            do
            {
                ret = mbedtls_ssl_close_notify(&tep->ssl);
            }
            while (MBEDTLS_ERR_SSL_WANT_WRITE == ret);
        }
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300
        DeleteSslEndPoint(tep);
    }
    u_arraylist_free(&g_caSslContext->peerList);
}

CAResult_t CAcloseSslConnection(const CAEndpoint_t *endpoint)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_RET(endpoint, NET_SSL_TAG, "Param endpoint is NULL" , CA_STATUS_INVALID_PARAM);

    oc_mutex_lock(g_sslContextMutex);
    if (NULL == g_caSslContext)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Context is NULL");
        oc_mutex_unlock(g_sslContextMutex);
        return CA_STATUS_FAILED;
    }
    SslEndPoint_t * tep = GetSslPeer(endpoint);
    if (NULL == tep)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Session does not exist");
        oc_mutex_unlock(g_sslContextMutex);
        return CA_STATUS_FAILED;
    }
    /* No error checking, the connection might be closed already */
    int ret = 0;
    do
    {
        ret = mbedtls_ssl_close_notify(&tep->ssl);
    }
    while (MBEDTLS_ERR_SSL_WANT_WRITE == ret);
1301 1302 1303 1304 1305 1306

    if (NULL != g_closeSslConnectionCallback)
    {
        g_closeSslConnectionCallback(tep->sep.identity.id, tep->sep.identity.id_length);
    }

1307 1308 1309 1310 1311 1312
    RemovePeerFromList(&tep->sep.endpoint);
    oc_mutex_unlock(g_sslContextMutex);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return CA_STATUS_OK;
}
1313

1314
void CAcloseSslConnectionAll(CATransportAdapter_t transportType)
1315 1316 1317 1318 1319 1320 1321 1322 1323 1324
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    oc_mutex_lock(g_sslContextMutex);
    if (NULL == g_caSslContext)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Context is NULL");
        oc_mutex_unlock(g_sslContextMutex);
        return;
    }

1325
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
1326
    OIC_LOG_V(DEBUG, NET_SSL_TAG,
1327 1328
            "Required transport [%d], peer count [%" PRIuPTR "]", transportType, listLength);
    for (size_t i = listLength; i > 0; i--)
1329
    {
1330
        SslEndPoint_t *tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, i - 1);
1331 1332 1333 1334
        if (NULL == tep)
        {
            continue;
        }
1335 1336 1337 1338 1339 1340 1341 1342 1343
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "SSL Connection [%s:%d], Transport [%d]",
                  tep->sep.endpoint.addr, tep->sep.endpoint.port, tep->sep.endpoint.adapter);

        // check transport matching
        if (0 == (tep->sep.endpoint.adapter & transportType))
        {
            OIC_LOG(DEBUG, NET_SSL_TAG, "Skip the un-matched transport session");
            continue;
        }
1344 1345 1346 1347 1348 1349 1350 1351 1352

        // TODO: need to check below code after socket close is ensured.
        /*int ret = 0;
        do
        {
            ret = mbedtls_ssl_close_notify(&tep->ssl);
        }
        while (MBEDTLS_ERR_SSL_WANT_WRITE == ret);*/

1353 1354
        // delete from list
        u_arraylist_remove(g_caSslContext->peerList, i - 1);
1355 1356 1357 1358 1359 1360 1361
        DeleteSslEndPoint(tep);
    }
    oc_mutex_unlock(g_sslContextMutex);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return;
}
1362 1363 1364 1365 1366 1367 1368

const char UUID_WILDCARD[UUID_STRING_SIZE] = "2a000000-0000-0000-0000-000000000000"; // conversion result for '*' to UUID, possible collision with real UUID

static int verifyIdentity( void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags ) {
    OC_UNUSED(data); // no need to pass extra data
    OC_UNUSED(flags); // we do not remove any flags
    static UuidContext_t ctx = { NULL };
1369 1370 1371 1372
    if (NULL == g_getIdentityCallback)
    {
        return MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE;
    }
Vitalii Irkha's avatar
Vitalii Irkha committed
1373 1374 1375 1376 1377 1378

    if (NULL == crt || NULL == crt->raw.p)
    {
        return MBEDTLS_ERR_X509_BAD_INPUT_DATA;
    }

1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432
    g_getIdentityCallback(&ctx, crt->raw.p, crt->raw.