ca_adapter_net_ssl.c 89.3 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 32 33 34
#include "ca_adapter_net_ssl.h"
#include "cacommon.h"
#include "caipinterface.h"
#include "oic_malloc.h"
35
#include "ocrandom.h"
36
#include "experimental/byte_array.h"
37
#include "octhread.h"
38
#include "octimer.h"
39 40 41 42 43 44 45 46

// 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"
47
#include "mbedtls/net_sockets.h"
Kevin Kane's avatar
Kevin Kane committed
48
#include "mbedtls/oid.h"
49 50 51 52 53
#ifdef __WITH_DTLS__
#include "mbedtls/timing.h"
#include "mbedtls/ssl_cookie.h"
#endif

54
#if !defined(NDEBUG) || defined(TB_LOG)
55 56 57 58
#include "mbedtls/debug.h"
#include "mbedtls/version.h"
#endif

Dave Thaler's avatar
Dave Thaler committed
59
#ifdef HAVE_SYS_TYPES_H
60
#include <sys/types.h>
Dave Thaler's avatar
Dave Thaler committed
61 62
#endif
#ifdef HAVE_SYS_STAT_H
63
#include <sys/stat.h>
Dave Thaler's avatar
Dave Thaler committed
64 65
#endif
#ifdef HAVE_FCNTL_H
66
#include <fcntl.h>
Dave Thaler's avatar
Dave Thaler committed
67 68
#endif
#ifdef HAVE_UNISTD_H
69 70 71 72 73 74 75 76
#include <unistd.h>
#endif

/**
 * @def MBED_TLS_VERSION_LEN
 * @brief mbedTLS version string length
 */
#define MBED_TLS_VERSION_LEN (16)
77 78 79
 /**
 * @def PERSONALIZATION_STRING
 * @brief Personalization string for the mbedtls RNG
80
 */
81
#define PERSONALIZATION_STRING "IOTIVITY_RND"
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
/**
 * @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
101
 * Level 1 logs errors only, level 4 is verbose logging.
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
 */
#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
132 133
 * @def SHA384_MAC_KEY_LENGTH
 * @brief MAC key length for SHA384 cipher suites
134
 */
Oleksii Beketov's avatar
Oleksii Beketov committed
135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
#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
159
 */
Oleksii Beketov's avatar
Oleksii Beketov committed
160 161 162 163 164 165 166 167 168 169 170
#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
171 172 173 174 175 176 177

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

Oleksii Beketov's avatar
Oleksii Beketov committed
178 179 180 181 182 183 184
/**@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
 */
185 186 187 188 189 190
#define SSL_CLOSE_NOTIFY(peer, ret)                                                                \
do                                                                                                 \
{                                                                                                  \
    (ret) = mbedtls_ssl_close_notify(&(peer)->ssl);                                                \
} while (MBEDTLS_ERR_SSL_WANT_WRITE == (ret))

191 192 193 194 195 196
/* 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
197 198 199 200 201 202 203 204 205 206
/**@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)

207 208 209 210 211
/** @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
212 213 214
 * **IMPORTANT:** Any time CHECK_MBEDTLS_RET is used an `exit:` goto label must
 *                be present to handle error processing.
 *
215 216 217 218 219 220 221
 * @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
222
} } while (0)
223 224 225

typedef enum
{
Oleksii Beketov's avatar
Oleksii Beketov committed
226 227 228 229 230 231 232 233 234 235 236 237 238
    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;
239 240 241 242 243 244 245

typedef enum
{
    ADAPTER_CURVE_SECP256R1,
    ADAPTER_CURVE_MAX
} AdapterCurve_t;

Oleksii Beketov's avatar
Oleksii Beketov committed
246
static const int tlsCipher[SSL_CIPHER_MAX][2] =
247
{
Oleksii Beketov's avatar
Oleksii Beketov committed
248 249 250
    {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},
251
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8, 0},
Chul Lee's avatar
Chul Lee committed
252
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM, 0},
Oleksii Beketov's avatar
Oleksii Beketov committed
253 254 255 256 257 258
    {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}
259 260
};

Oleksii Beketov's avatar
Oleksii Beketov committed
261
static int g_cipherSuitesList[SSL_CIPHER_MAX];
262 263 264 265 266 267 268 269

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

typedef struct  {
    int code;
270
    unsigned char alert;
271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296
} 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}
};

297
static unsigned char GetAlertCode(uint32_t flags)
298 299 300 301 302 303 304 305 306 307 308 309 310
{
    const CrtVerifyAlert_t *cur;

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

311
#if !defined(NDEBUG) || defined(TB_LOG)
312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
/**
 * 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
328 329 330 331 332 333 334
    char * temp = (char*) str;
    size_t len = strlen(temp);
    if (1 <= len && temp[len - 1] == '\n')
    {
        temp[len - 1] = '\0';
    }

335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351
    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. */
352
    CAErrorHandleCallback errorCallback;    /**< Callback used to pass error to upper layer. */
353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371
} 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
372

Oleksii Beketov's avatar
Oleksii Beketov committed
373
    SslCipher_t cipher;
374 375 376 377 378
    SslCallbacks_t adapterCallbacks[MAX_SUPPORTED_ADAPTERS];
    mbedtls_x509_crl crl;
    bool cipherFlag[2];
    int selectedCipher;

379
#ifdef __WITH_DTLS__
380
    mbedtls_ssl_cookie_ctx cookieCtx;
381 382 383
    int timerId;
#endif

384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410
} 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;

/**
 * @var g_dtlsContextMutex
411
 * @brief Mutex to synchronize access to g_caSslContext and g_sslCallback.
412 413 414 415 416 417 418
 */
static oc_mutex g_sslContextMutex = NULL;

/**
 * @var g_sslCallback
 * @brief callback to deliver the TLS handshake result
 */
419
static CAHandshakeErrorCallback g_sslCallback = NULL;
420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442

/**
 * 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
443 444
    mbedtls_timing_delay_context timer;
#endif // __WITH_DTLS__
445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467
} 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__);
}
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__);
}

468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485
/**
 * 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;
}

486 487 488 489 490 491 492 493
static int GetAdapterIndex(CATransportAdapter_t adapter)
{
    switch (adapter)
    {
        case CA_ADAPTER_IP:
            return 0;
        case CA_ADAPTER_TCP:
            return 1;
494 495
        case CA_ADAPTER_GATT_BTLE:
            return 2;
496 497 498 499 500
        default:
            OIC_LOG(ERROR, NET_SSL_TAG, "Unsupported adapter");
            return -1;
    }
}
501 502 503

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

504 505 506 507 508 509 510
/**
 * Write callback.
 *
 * @param[in]  tep    TLS endpoint
 * @param[in]  data    message
 * @param[in]  dataLen    message length
 *
511
 * @return  message length or -1 on error.
512 513 514 515
 */
static int SendCallBack(void * tep, const unsigned char * data, size_t dataLen)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
516 517
    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);
518
    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", -1);
519
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Data len: %" PRIuPTR, dataLen);
520
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Adapter: %u", ((SslEndPoint_t * )tep)->sep.endpoint.adapter);
521
    ssize_t sentLen = 0;
522
    int adapterIndex = GetAdapterIndex(((SslEndPoint_t * )tep)->sep.endpoint.adapter);
523
    if (0 <= adapterIndex && MAX_SUPPORTED_ADAPTERS > adapterIndex)
524
    {
525
        size_t dataToSend = (dataLen > INT_MAX) ? INT_MAX : dataLen;
526
        CAPacketSendCallback sendCallback = g_caSslContext->adapterCallbacks[adapterIndex].sendCallback;
527
        sentLen = sendCallback(&(((SslEndPoint_t * )tep)->sep.endpoint), (const void *) data, dataToSend);
528 529 530 531 532
        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)
533 534
        {
            OIC_LOG_V(DEBUG, NET_SSL_TAG,
535
                      "Packet was partially sent - sent/total/remained bytes : %d/%" PRIuPTR "/%" PRIuPTR,
536 537
                      sentLen, dataLen, (dataLen - sentLen));
        }
538 539 540 541
    }
    else
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Unsupported adapter");
542
        return -1;
543 544 545
    }

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
546
    return (int)sentLen;
547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563
}
/**
 * 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;
564 565
    size_t retLen = ((recBuf->len > recBuf->loaded) ? (recBuf->len - recBuf->loaded) : 0);
    retLen = (retLen < dataLen) ? retLen : dataLen;
566

567 568 569 570 571
    if (retLen > INT_MAX)
    {
        return 0;
    }

572 573 574 575 576 577 578 579 580 581 582
    memcpy(data, recBuf->buff + recBuf->loaded, retLen);
    recBuf->loaded += retLen;

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

/**
 * Parse chain of X.509 certificates.
 *
 * @param[out] crt     container for X.509 certificates
583 584
 * @param[in]  buf     buffer with X.509 certificates. Certificates must be in a single null-terminated
 *                     string, with each certificate in PEM encoding with headers.
585
 * @param[in]  bufLen  buffer length
Oleksii Beketov's avatar
Oleksii Beketov committed
586
 * @param[in]  errNum  number certificates that failed to parse
587
 *
Oleksii Beketov's avatar
Oleksii Beketov committed
588
 * @return  number of successfully parsed certificates or -1 on error
589
 */
590
static int ParseChain(mbedtls_x509_crt * crt, unsigned char * buf, size_t bufLen, int * errNum)
591
{
592
    int ret;
593
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
594 595
    VERIFY_NON_NULL_RET(crt, NET_SSL_TAG, "Param crt is NULL", -1);
    VERIFY_NON_NULL_RET(buf, NET_SSL_TAG, "Param buf is NULL", -1);
596

597
    if (NULL != errNum)
598
    {
599
        *errNum = 0;
600
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
601

602
    if ((bufLen >= 2) && (buf[0] == 0x30) && (buf[1] == 0x82))
603
    {
604 605
        OIC_LOG_V(ERROR, NET_SSL_TAG, "DER-encoded certificate passed to ParseChain");
        return -1;
606
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
607

608 609 610 611 612 613 614 615 616 617 618
    ret = mbedtls_x509_crt_parse(crt, buf, bufLen);
    if (0 > ret)
    {
        OIC_LOG_V(ERROR, NET_SSL_TAG, "mbedtls_x509_crt_parse failed: -0x%04x", -(ret));
        return -1;
    }

    if (NULL != errNum)
    {
        *errNum = ret;
    }
619

620 621 622 623 624
    ret = 0;
    for (const mbedtls_x509_crt *cur = crt; cur != NULL; cur = cur->next)
    {
        ret++;
    }
625

626 627
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return ret;
628 629
}

630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653
/**
 * 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;
    }

    DEINIT_BYTE_ARRAY(inf->crt);
    DEINIT_BYTE_ARRAY(inf->key);
    DEINIT_BYTE_ARRAY(inf->ca);
    DEINIT_BYTE_ARRAY(inf->crl);

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

654 655 656 657 658
//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);
659
    // load pk key, cert, trust chain and crl
660 661 662 663 664 665 666
    PkiInfo_t pkiInfo = {
        BYTE_ARRAY_INITIALIZER,
        BYTE_ARRAY_INITIALIZER,
        BYTE_ARRAY_INITIALIZER,
        BYTE_ARRAY_INITIALIZER
    };

667 668
    if (g_getPkixInfoCallback)
    {
669
        g_getPkixInfoCallback(&pkiInfo);
670 671 672
    }

    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", -1);
673 674 675 676 677 678 679 680 681 682 683

    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);

684 685
    mbedtls_ssl_config * serverConf = (adapter == CA_ADAPTER_IP ||
                                   adapter == CA_ADAPTER_GATT_BTLE ?
686
                                   &g_caSslContext->serverDtlsConf : &g_caSslContext->serverTlsConf);
687 688
    mbedtls_ssl_config * clientConf = (adapter == CA_ADAPTER_IP ||
                                   adapter == CA_ADAPTER_GATT_BTLE ?
689 690
                                   &g_caSslContext->clientDtlsConf : &g_caSslContext->clientTlsConf);
    // optional
Oleksii Beketov's avatar
Oleksii Beketov committed
691 692
    int ret;
    int errNum;
693
    int count = ParseChain(&g_caSslContext->crt, pkiInfo.crt.data, pkiInfo.crt.len, &errNum);
Oleksii Beketov's avatar
Oleksii Beketov committed
694
    if (0 >= count)
695 696 697 698
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "Own certificate chain parsing error");
        goto required;
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
699 700 701 702 703
    if (0 != errNum)
    {
        OIC_LOG_V(WARNING, NET_SSL_TAG, "Own certificate chain parsing error: %d certs failed to parse", errNum);
        goto required;
    }
704
    ret =  mbedtls_pk_parse_key(&g_caSslContext->pkey, pkiInfo.key.data, pkiInfo.key.len,
705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724
                                                                               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;
    }

725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740
    /* 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");
    }

741
    required:
742
    count = ParseChain(&g_caSslContext->ca, pkiInfo.ca.data, pkiInfo.ca.len, &errNum);
Oleksii Beketov's avatar
Oleksii Beketov committed
743
    if(0 >= count)
744 745 746
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "CA chain parsing error");
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
747
        DeInitPkixInfo(&pkiInfo);
748 749
        return -1;
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
750 751 752 753
    if(0 != errNum)
    {
        OIC_LOG_V(WARNING, NET_SSL_TAG, "CA chain parsing warning: %d certs failed to parse", errNum);
    }
754

755
    ret = mbedtls_x509_crl_parse_der(&g_caSslContext->crl, pkiInfo.crl.data, pkiInfo.crl.len);
756 757 758
    if(0 != ret)
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "CRL parsing error");
Oleksii Beketov's avatar
Oleksii Beketov committed
759
        CONF_SSL(clientConf, serverConf, mbedtls_ssl_conf_ca_chain, &g_caSslContext->ca, NULL);
760 761 762
    }
    else
    {
Oleksii Beketov's avatar
Oleksii Beketov committed
763 764
        CONF_SSL(clientConf, serverConf, mbedtls_ssl_conf_ca_chain,
                 &g_caSslContext->ca, &g_caSslContext->crl);
765 766
    }

767 768
    DeInitPkixInfo(&pkiInfo);

769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
    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);
790 791 792
    VERIFY_TRUE_RET((descLen <= CA_MAX_ENDPOINT_IDENTITY_LEN), NET_SSL_TAG,
                    "desc too long!", -1);

793 794 795 796 797 798 799 800
    (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);
801
        ((SslEndPoint_t *) ssl)->sep.identity.id_length = (uint16_t)descLen;
802 803 804
        OIC_LOG(DEBUG, NET_SSL_TAG, "PSK:");
        OIC_LOG_BUFFER(DEBUG, NET_SSL_TAG, keyBuf, ret);

805 806 807
        OIC_LOG(DEBUG, NET_SSL_TAG, "Identity:");
        OIC_LOG_BUFFER(DEBUG, NET_SSL_TAG, desc, descLen);

808 809 810 811 812 813 814 815 816 817 818 819 820 821 822
        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)
{
823 824
    size_t listIndex = 0;
    size_t listLength = 0;
825
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
826 827 828

    oc_mutex_assert_owner(g_sslContextMutex, true);

829
    VERIFY_NON_NULL_RET(peer, NET_SSL_TAG, "TLS peer is NULL", NULL);
830
    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", NULL);
831 832 833 834 835 836 837 838 839 840

    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;
        }
841 842 843 844 845 846 847 848

        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))
849 850 851 852 853 854 855 856 857
        {
            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;
}
858 859

/**
860
 * Gets a copy of CA secure endpoint info corresponding for endpoint.
861 862
 *
 * @param[in]  peer    remote address
863
 * @param[out] sep     copy of secure endpoint data
864
 *
865
 * @return  CA_STATUS_OK on success; other error code on failure
866
 */
867
CAResult_t GetCASecureEndpointData(const CAEndpoint_t* peer, CASecureEndpoint_t* sep)
868 869 870 871
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);

    oc_mutex_lock(g_sslContextMutex);
872

873 874 875 876
    if (NULL == g_caSslContext)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Context is NULL");
        oc_mutex_unlock(g_sslContextMutex);
877
        return CA_STATUS_NOT_INITIALIZED;
878 879 880
    }

    SslEndPoint_t* sslPeer = GetSslPeer(peer);
881
    if (sslPeer)
882
    {
883 884
        // sslPeer could be destroyed after releasing the lock, so make a copy
        // of the endpoint information before releasing the lock.
885
        memcpy(sep, &sslPeer->sep, sizeof(sslPeer->sep));
886
        oc_mutex_unlock(g_sslContextMutex);
887 888

        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
889
        return CA_STATUS_OK;
890 891 892
    }

    oc_mutex_unlock(g_sslContextMutex);
893 894 895

    OIC_LOG(DEBUG, NET_SSL_TAG, "GetSslPeer returned NULL");
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
896
    return CA_STATUS_INVALID_PARAM;
897 898
}

899 900 901 902 903 904 905 906 907 908 909 910 911 912 913
/**
 * 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);

914
    // In the current implementation, the caller already owns g_sslContextMutex.
915
    oc_mutex_assert_owner(g_sslContextMutex, true);
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954

    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);

955 956
    // In the current implementation, the caller doesn't own g_sslContextMutex.
    oc_mutex_assert_owner(g_sslContextMutex, false);
957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984
    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;
}

985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
/**
 * 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");
1009 1010
    size_t listIndex = 0;
    size_t listLength = 0;
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024

    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__);
}
1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035

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

1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
/**
 * 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)
{
1058 1059
    oc_mutex_assert_owner(g_sslContextMutex, true);

1060
    VERIFY_NON_NULL_VOID(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL");
1061
    VERIFY_NON_NULL_VOID(endpoint, NET_SSL_TAG, "endpoint");
1062

1063 1064
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
    for (size_t listIndex = 0; listIndex < listLength; listIndex++)
1065
    {
1066
        SslEndPoint_t * tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, listIndex);
1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079
        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;
        }
    }
}
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097

 /**
  * 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)
{
1098
    OC_UNUSED(str);
1099
    OC_UNUSED(msg);
1100

1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
    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))
    {
        OIC_LOG_V(ERROR, NET_SSL_TAG, "%s: -0x%x", (str), -ret);
1123 1124

        // Make a copy of the endpoint, because the callback might
1125
        // free the peer object, during notifySubscriber() below.
1126 1127
        CAEndpoint_t removedEndpoint = (peer)->sep.endpoint;

1128
        oc_mutex_lock(g_sslContextMutex);
1129 1130 1131

        if (MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO != ret)
        {
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143
            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);
            }
1144 1145
        }

1146
        RemovePeerFromList(&removedEndpoint);
1147 1148

        oc_mutex_unlock(g_sslContextMutex);
1149 1150 1151 1152 1153 1154
        return false;
    }

    return true;
}

1155 1156 1157 1158 1159
/**
 * Deletes session list.
 */
static void DeletePeerList()
{
1160 1161
    oc_mutex_assert_owner(g_sslContextMutex, true);

1162 1163
    VERIFY_NON_NULL_VOID(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL");

1164 1165
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
    for (size_t listIndex = 0; listIndex < listLength; listIndex++)
1166
    {
1167
        SslEndPoint_t * tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, listIndex);
1168 1169 1170 1171
        if (NULL == tep)
        {
            continue;
        }
Dmitriy Zhuravlev's avatar
Dmitriy Zhuravlev committed
1172 1173 1174 1175 1176 1177 1178 1179 1180
        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);
        }
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218
        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);

    RemovePeerFromList(&tep->sep.endpoint);
    oc_mutex_unlock(g_sslContextMutex);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return CA_STATUS_OK;
}
1219

1220
void CAcloseSslConnectionAll(CATransportAdapter_t transportType)
1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
{
    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;
    }

1231
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
1232
    OIC_LOG_V(DEBUG, NET_SSL_TAG,
1233 1234
            "Required transport [%d], peer count [%" PRIuPTR "]", transportType, listLength);
    for (size_t i = listLength; i > 0; i--)
1235
    {
1236
        SslEndPoint_t *tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, i - 1);
1237 1238 1239 1240
        if (NULL == tep)
        {
            continue;
        }
1241 1242 1243 1244 1245 1246 1247 1248 1249
        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;
        }
1250 1251 1252 1253 1254 1255 1256 1257 1258

        // 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);*/

1259 1260
        // delete from list
        u_arraylist_remove(g_caSslContext->peerList, i - 1);
1261 1262 1263 1264 1265 1266 1267
        DeleteSslEndPoint(tep);
    }
    oc_mutex_unlock(g_sslContextMutex);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return;
}
1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
/**
 * Creates session for endpoint.
 *
 * @param[in]  endpoint    remote address
 * @param[in]  config    mbedTLS configuration info
 *
 * @return  TLS endpoint or NULL
 */
static SslEndPoint_t * NewSslEndPoint(const CAEndpoint_t * endpoint, mbedtls_ssl_config * config)
{
    SslEndPoint_t * tep = NULL;
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_RET(endpoint, NET_SSL_TAG, "endpoint", NULL);
    VERIFY_NON_NULL_RET(config, NET_SSL_TAG, "config", NULL);
1282
    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", NULL);
1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304

    tep = (SslEndPoint_t *) OICCalloc(1, sizeof (SslEndPoint_t));
    if (NULL == tep)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Malloc failed!");
        return NULL;
    }

    tep->sep.endpoint = *endpoint;
    tep->sep.endpoint.flags = (CATransportFlags_t)(tep->sep.endpoint.flags | CA_SECURE);

    if(0 != mbedtls_ssl_setup(&tep->ssl, config))
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Setup failed");
        OICFree(tep);
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
        return NULL;
    }

    mbedtls_ssl_set_bio(&tep->ssl, tep, SendCallBack, RecvCallBack, NULL);
    if (MBEDTLS_SSL_TRANSPORT_DATAGRAM == config->transport)
    {
Chul Lee's avatar
Chul Lee committed
1305
        mbedtls_ssl_set_timer_cb(&tep->ssl, &tep->timer,
1306 1307 1308 1309 1310 1311 1312
                                  mbedtls_timing_set_delay, mbedtls_timing_get_delay);
        if (MBEDTLS_SSL_IS_SERVER == config->endpoint)
        {
            if (0 != mbedtls_ssl_set_client_transport_id(&tep->ssl,
                                    (const unsigned char *) endpoint->addr, sizeof(endpoint->addr)))
            {
                OIC_LOG(ERROR, NET_SSL_TAG, "Transport id setup failed!");
1313
                mbedtls_ssl_free(&tep->ssl);
1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328
                OICFree(tep);
                OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
                return NULL;
            }
        }
    }
    tep->cacheList = u_arraylist_create();
    if (NULL == tep->cacheList)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "cacheList initialization failed!");
        mbedtls_ssl_free(&tep->ssl);
        OICFree(tep);
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
        return NULL;
    }
1329 1330 1331
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "New [%s role] endpoint added [%s:%d]",
            (MBEDTLS_SSL_IS_SERVER==config->endpoint ? "server" : "client"),
            endpoint->addr, endpoint->port);
1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return tep;
}
/**
 * Initializes PSK identity.
 *
 * @param[out]  config    client/server config to be updated
 *
 * @return  0 on success or -1 on error
 */
static int InitPskIdentity(mbedtls_ssl_config * config)
{
    uint8_t idBuf[UUID_LENGTH] = {0};
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
    VERIFY_NON_NULL_RET(config, NET_SSL_TAG, "Param config is NULL" , -1);

    if (0 > g_getCredentialsCallback(CA_DTLS_PSK_IDENTITY, NULL, 0, idBuf, UUID_LENGTH))
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Identity not found");
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
        return -1;
    }
    if (0 != mbedtls_ssl_conf_psk(config, idBuf, 0, idBuf, UUID_LENGTH))
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Identity initialization failed!");
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
        return -1;
    }
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return 0;
}
1363 1364
static void SetupCipher(mbedtls_ssl_config * config, CATransportAdapter_t adapter,
                        const char* deviceId)
1365 1366 1367
{
    int index = 0;
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
1368

1369 1370 1371
    VERIFY_NON_NULL_VOID(config, NET_SSL_TAG, "Invaild param");
    VERIFY_NON_NULL_VOID(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL");
    VERIFY_NON_NULL_VOID(g_getCredentialTypesCallback, NET_SSL_TAG, "Param callback is null");
1372

1373 1374 1375 1376 1377 1378 1379 1380 1381 1382
    //Resetting cipherFlag
    g_caSslContext->cipherFlag[0] = false;
    g_caSslContext->cipherFlag[1] = false;

    if (NULL == g_getCredentialTypesCallback)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Param callback is null");
        return;
    }

1383 1384
    g_getCredentialTypesCallback(g_caSslContext->cipherFlag, deviceId);

1385 1386 1387
    // Retrieve the PSK credential from SRM or use PIN based generation