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 44 45 46 47 48 49

// 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"
50
#include "mbedtls/net_sockets.h"
Kevin Kane's avatar
Kevin Kane committed
51
#include "mbedtls/oid.h"
Oleksandr Dmytrenko's avatar
Oleksandr Dmytrenko committed
52 53
#include "mbedtls/x509.h"
#include "mbedtls/error.h"
54 55 56 57 58
#ifdef __WITH_DTLS__
#include "mbedtls/timing.h"
#include "mbedtls/ssl_cookie.h"
#endif

59
#if !defined(NDEBUG) || defined(TB_LOG)
60 61 62 63
#include "mbedtls/debug.h"
#include "mbedtls/version.h"
#endif

Dave Thaler's avatar
Dave Thaler committed
64
#ifdef HAVE_SYS_TYPES_H
65
#include <sys/types.h>
Dave Thaler's avatar
Dave Thaler committed
66 67
#endif
#ifdef HAVE_SYS_STAT_H
68
#include <sys/stat.h>
Dave Thaler's avatar
Dave Thaler committed
69 70
#endif
#ifdef HAVE_FCNTL_H
71
#include <fcntl.h>
Dave Thaler's avatar
Dave Thaler committed
72 73
#endif
#ifdef HAVE_UNISTD_H
74 75 76 77 78 79 80 81
#include <unistd.h>
#endif

/**
 * @def MBED_TLS_VERSION_LEN
 * @brief mbedTLS version string length
 */
#define MBED_TLS_VERSION_LEN (16)
82 83 84
 /**
 * @def PERSONALIZATION_STRING
 * @brief Personalization string for the mbedtls RNG
85
 */
86
#define PERSONALIZATION_STRING "IOTIVITY_RND"
87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105
/**
 * @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
106
 * Level 1 logs errors only, level 4 is verbose logging.
107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136
 */
#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
137 138
 * @def SHA384_MAC_KEY_LENGTH
 * @brief MAC key length for SHA384 cipher suites
139
 */
Oleksii Beketov's avatar
Oleksii Beketov committed
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163
#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
164
 */
Oleksii Beketov's avatar
Oleksii Beketov committed
165 166 167 168 169 170 171 172 173 174 175
#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
176 177 178 179 180 181 182

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

Oleksii Beketov's avatar
Oleksii Beketov committed
183 184 185 186 187 188 189
/**@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
 */
190 191 192 193 194 195
#define SSL_CLOSE_NOTIFY(peer, ret)                                                                \
do                                                                                                 \
{                                                                                                  \
    (ret) = mbedtls_ssl_close_notify(&(peer)->ssl);                                                \
} while (MBEDTLS_ERR_SSL_WANT_WRITE == (ret))

196 197 198 199 200 201
/* 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
202 203 204 205 206 207 208 209 210 211
/**@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)

212 213 214 215 216
/** @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
217 218 219
 * **IMPORTANT:** Any time CHECK_MBEDTLS_RET is used an `exit:` goto label must
 *                be present to handle error processing.
 *
220 221 222 223 224 225 226
 * @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
227
} } while (0)
228 229 230

typedef enum
{
Oleksii Beketov's avatar
Oleksii Beketov committed
231 232 233 234 235 236 237 238 239 240 241 242 243
    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;
244 245 246 247 248 249 250

typedef enum
{
    ADAPTER_CURVE_SECP256R1,
    ADAPTER_CURVE_MAX
} AdapterCurve_t;

Oleksii Beketov's avatar
Oleksii Beketov committed
251
static const int tlsCipher[SSL_CIPHER_MAX][2] =
252
{
Oleksii Beketov's avatar
Oleksii Beketov committed
253 254 255
    {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},
256
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8, 0},
Chul Lee's avatar
Chul Lee committed
257
    {MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM, 0},
Oleksii Beketov's avatar
Oleksii Beketov committed
258 259 260 261 262 263
    {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}
264 265
};

Oleksii Beketov's avatar
Oleksii Beketov committed
266
static int g_cipherSuitesList[SSL_CIPHER_MAX];
267 268 269 270 271 272 273 274

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

typedef struct  {
    int code;
275
    unsigned char alert;
276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
} 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}
};

302
static unsigned char GetAlertCode(uint32_t flags)
303 304 305 306 307 308 309 310 311 312 313 314 315
{
    const CrtVerifyAlert_t *cur;

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

316
#if !defined(NDEBUG) || defined(TB_LOG)
317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332
/**
 * 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
333 334 335 336 337 338 339
    char * temp = (char*) str;
    size_t len = strlen(temp);
    if (1 <= len && temp[len - 1] == '\n')
    {
        temp[len - 1] = '\0';
    }

340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356
    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. */
357
    CAErrorHandleCallback errorCallback;    /**< Callback used to pass error to upper layer. */
358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
} 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
377

Oleksii Beketov's avatar
Oleksii Beketov committed
378
    SslCipher_t cipher;
379 380 381 382 383
    SslCallbacks_t adapterCallbacks[MAX_SUPPORTED_ADAPTERS];
    mbedtls_x509_crl crl;
    bool cipherFlag[2];
    int selectedCipher;

384
#ifdef __WITH_DTLS__
385
    mbedtls_ssl_cookie_ctx cookieCtx;
386 387 388
    int timerId;
#endif

389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412
} 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;
413 414 415 416 417 418
/**
 * @var g_getIdentityCallback
 *
 * @brief callback to retrieve acceptable UUID list
 */
static CAgetIdentityHandler g_getIdentityCallback = NULL;
419 420 421

/**
 * @var g_dtlsContextMutex
422
 * @brief Mutex to synchronize access to g_caSslContext and g_sslCallback.
423 424 425 426 427 428 429
 */
static oc_mutex g_sslContextMutex = NULL;

/**
 * @var g_sslCallback
 * @brief callback to deliver the TLS handshake result
 */
430
static CAHandshakeErrorCallback g_sslCallback = NULL;
431

432 433 434 435 436 437 438
/**
 * @var g_peerCNVerifyCallback
 *
 * @brief callback to utilize peer certificate information
 */
static PeerCNVerifyCallback g_peerCNVerifyCallback = NULL;

439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460
/**
 * 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
461 462
    mbedtls_timing_delay_context timer;
#endif // __WITH_DTLS__
463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478
} 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__);
}
479

480 481 482 483 484 485 486
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__);
}

487 488 489 490 491 492 493
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__);
}

494 495 496 497 498 499 500 501 502 503 504
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__);
}

505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522
/**
 * 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;
}

523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559
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;
}

560 561 562 563 564 565 566 567
static int GetAdapterIndex(CATransportAdapter_t adapter)
{
    switch (adapter)
    {
        case CA_ADAPTER_IP:
            return 0;
        case CA_ADAPTER_TCP:
            return 1;
568 569
        case CA_ADAPTER_GATT_BTLE:
            return 2;
570 571 572 573 574
        default:
            OIC_LOG(ERROR, NET_SSL_TAG, "Unsupported adapter");
            return -1;
    }
}
575 576 577

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

578 579 580 581 582 583 584
/**
 * Write callback.
 *
 * @param[in]  tep    TLS endpoint
 * @param[in]  data    message
 * @param[in]  dataLen    message length
 *
585
 * @return  message length or -1 on error.
586 587 588 589
 */
static int SendCallBack(void * tep, const unsigned char * data, size_t dataLen)
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
590 591
    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);
592
    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", -1);
593
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Data len: %" PRIuPTR, dataLen);
594
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Adapter: %u", ((SslEndPoint_t * )tep)->sep.endpoint.adapter);
595
    ssize_t sentLen = 0;
596
    int adapterIndex = GetAdapterIndex(((SslEndPoint_t * )tep)->sep.endpoint.adapter);
597
    if (0 <= adapterIndex && MAX_SUPPORTED_ADAPTERS > adapterIndex)
598
    {
599
        size_t dataToSend = (dataLen > INT_MAX) ? INT_MAX : dataLen;
600
        CAPacketSendCallback sendCallback = g_caSslContext->adapterCallbacks[adapterIndex].sendCallback;
601
        sentLen = sendCallback(&(((SslEndPoint_t * )tep)->sep.endpoint), (const void *) data, dataToSend);
602 603 604 605 606
        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)
607 608
        {
            OIC_LOG_V(DEBUG, NET_SSL_TAG,
609
                      "Packet was partially sent - sent/total/remained bytes : %" PRIdPTR "/%" PRIuPTR "/%" PRIuPTR,
610 611
                      sentLen, dataLen, (dataLen - sentLen));
        }
612 613 614 615
    }
    else
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Unsupported adapter");
616
        return -1;
617 618 619
    }

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
620
    return (int)sentLen;
621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637
}
/**
 * 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;
638 639
    size_t retLen = ((recBuf->len > recBuf->loaded) ? (recBuf->len - recBuf->loaded) : 0);
    retLen = (retLen < dataLen) ? retLen : dataLen;
640

641 642 643 644 645
    if (retLen > INT_MAX)
    {
        return 0;
    }

646 647 648 649 650 651 652 653 654 655 656
    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
657 658
 * @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.
659
 * @param[in]  bufLen  buffer length
Oleksii Beketov's avatar
Oleksii Beketov committed
660
 * @param[in]  errNum  number certificates that failed to parse
661
 *
Oleksii Beketov's avatar
Oleksii Beketov committed
662
 * @return  number of successfully parsed certificates or -1 on error
663
 */
664
static int ParseChain(mbedtls_x509_crt * crt, unsigned char * buf, size_t bufLen, int * errNum)
665
{
666
    int ret;
667
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
668 669
    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);
670

671
    if (NULL != errNum)
672
    {
673
        *errNum = 0;
674
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
675

676
    if ((bufLen >= 2) && (buf[0] == 0x30) && (buf[1] == 0x82))
677
    {
678 679
        OIC_LOG_V(ERROR, NET_SSL_TAG, "DER-encoded certificate passed to ParseChain");
        return -1;
680
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
681

682 683 684 685 686 687 688 689 690 691 692
    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;
    }
693

694 695 696 697 698
    ret = 0;
    for (const mbedtls_x509_crt *cur = crt; cur != NULL; cur = cur->next)
    {
        ret++;
    }
699

700 701
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return ret;
702 703
}

704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727
/**
 * 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__);
}

728 729 730 731 732
//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);
733
    // load pk key, cert, trust chain and crl
734 735 736 737 738 739 740
    PkiInfo_t pkiInfo = {
        BYTE_ARRAY_INITIALIZER,
        BYTE_ARRAY_INITIALIZER,
        BYTE_ARRAY_INITIALIZER,
        BYTE_ARRAY_INITIALIZER
    };

741 742
    if (g_getPkixInfoCallback)
    {
743
        g_getPkixInfoCallback(&pkiInfo);
744 745 746
    }

    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", -1);
747 748 749 750 751 752 753 754 755 756 757

    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);

758 759
    mbedtls_ssl_config * serverConf = (adapter == CA_ADAPTER_IP ||
                                   adapter == CA_ADAPTER_GATT_BTLE ?
760
                                   &g_caSslContext->serverDtlsConf : &g_caSslContext->serverTlsConf);
761 762
    mbedtls_ssl_config * clientConf = (adapter == CA_ADAPTER_IP ||
                                   adapter == CA_ADAPTER_GATT_BTLE ?
763 764
                                   &g_caSslContext->clientDtlsConf : &g_caSslContext->clientTlsConf);
    // optional
Oleksii Beketov's avatar
Oleksii Beketov committed
765 766
    int ret;
    int errNum;
767
    int count = ParseChain(&g_caSslContext->crt, pkiInfo.crt.data, pkiInfo.crt.len, &errNum);
Oleksii Beketov's avatar
Oleksii Beketov committed
768
    if (0 >= count)
769 770 771 772
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "Own certificate chain parsing error");
        goto required;
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
773 774 775 776 777
    if (0 != errNum)
    {
        OIC_LOG_V(WARNING, NET_SSL_TAG, "Own certificate chain parsing error: %d certs failed to parse", errNum);
        goto required;
    }
778 779 780 781 782 783 784 785 786 787 788 789 790

    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;
    }

791
    ret =  mbedtls_pk_parse_key(&g_caSslContext->pkey, pkiInfo.key.data, pkiInfo.key.len,
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811
                                                                               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;
    }

812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827
    /* 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");
    }

828
    required:
829
    count = ParseChain(&g_caSslContext->ca, pkiInfo.ca.data, pkiInfo.ca.len, &errNum);
Oleksii Beketov's avatar
Oleksii Beketov committed
830
    if(0 >= count)
831 832 833
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "CA chain parsing error");
        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
834
        DeInitPkixInfo(&pkiInfo);
835 836
        return -1;
    }
Oleksii Beketov's avatar
Oleksii Beketov committed
837 838 839 840
    if(0 != errNum)
    {
        OIC_LOG_V(WARNING, NET_SSL_TAG, "CA chain parsing warning: %d certs failed to parse", errNum);
    }
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
    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;
        }
    }
859

860
    ret = mbedtls_x509_crl_parse_der(&g_caSslContext->crl, pkiInfo.crl.data, pkiInfo.crl.len);
861 862 863
    if(0 != ret)
    {
        OIC_LOG(WARNING, NET_SSL_TAG, "CRL parsing error");
Oleksii Beketov's avatar
Oleksii Beketov committed
864
        CONF_SSL(clientConf, serverConf, mbedtls_ssl_conf_ca_chain, &g_caSslContext->ca, NULL);
865 866 867
    }
    else
    {
Oleksii Beketov's avatar
Oleksii Beketov committed
868 869
        CONF_SSL(clientConf, serverConf, mbedtls_ssl_conf_ca_chain,
                 &g_caSslContext->ca, &g_caSslContext->crl);
870 871
    }

872 873
    DeInitPkixInfo(&pkiInfo);

874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894
    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);
895 896 897
    VERIFY_TRUE_RET((descLen <= CA_MAX_ENDPOINT_IDENTITY_LEN), NET_SSL_TAG,
                    "desc too long!", -1);

898 899 900 901 902 903 904 905
    (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);
906
        ((SslEndPoint_t *) ssl)->sep.identity.id_length = (uint16_t)descLen;
907 908 909
        OIC_LOG(DEBUG, NET_SSL_TAG, "PSK:");
        OIC_LOG_BUFFER(DEBUG, NET_SSL_TAG, keyBuf, ret);

910 911 912
        OIC_LOG(DEBUG, NET_SSL_TAG, "Identity:");
        OIC_LOG_BUFFER(DEBUG, NET_SSL_TAG, desc, descLen);

913 914 915 916 917 918 919 920 921 922 923 924 925 926 927
        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)
{
928 929
    size_t listIndex = 0;
    size_t listLength = 0;
930
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);
931 932 933

    oc_mutex_assert_owner(g_sslContextMutex, true);

934
    VERIFY_NON_NULL_RET(peer, NET_SSL_TAG, "TLS peer is NULL", NULL);
935
    VERIFY_NON_NULL_RET(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL", NULL);
936 937 938 939 940 941 942 943 944 945

    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;
        }
946 947 948 949 950 951 952 953

        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))
954 955 956 957 958 959 960 961 962
        {
            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;
}
963 964

/**
965
 * Gets a copy of CA secure endpoint info corresponding for endpoint.
966 967
 *
 * @param[in]  peer    remote address
968
 * @param[out] sep     copy of secure endpoint data
969
 *
970
 * @return  CA_STATUS_OK on success; other error code on failure
971
 */
972
CAResult_t GetCASecureEndpointData(const CAEndpoint_t* peer, CASecureEndpoint_t* sep)
973 974 975 976
{
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "In %s", __func__);

    oc_mutex_lock(g_sslContextMutex);
977

978 979 980 981
    if (NULL == g_caSslContext)
    {
        OIC_LOG(ERROR, NET_SSL_TAG, "Context is NULL");
        oc_mutex_unlock(g_sslContextMutex);
982
        return CA_STATUS_NOT_INITIALIZED;
983 984 985
    }

    SslEndPoint_t* sslPeer = GetSslPeer(peer);
986
    if (sslPeer)
987
    {
988 989
        // sslPeer could be destroyed after releasing the lock, so make a copy
        // of the endpoint information before releasing the lock.
990
        memcpy(sep, &sslPeer->sep, sizeof(sslPeer->sep));
991
        oc_mutex_unlock(g_sslContextMutex);
992 993

        OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
994
        return CA_STATUS_OK;
995 996 997
    }

    oc_mutex_unlock(g_sslContextMutex);
998 999 1000

    OIC_LOG(DEBUG, NET_SSL_TAG, "GetSslPeer returned NULL");
    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
1001
    return CA_STATUS_INVALID_PARAM;
1002 1003
}

1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018
/**
 * 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);

1019
    // In the current implementation, the caller already owns g_sslContextMutex.
1020
    oc_mutex_assert_owner(g_sslContextMutex, true);
1021 1022 1023 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 1052 1053 1054 1055 1056 1057 1058 1059

    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);

1060 1061
    // In the current implementation, the caller doesn't own g_sslContextMutex.
    oc_mutex_assert_owner(g_sslContextMutex, false);
1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
    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;
}

1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113
/**
 * 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");
1114 1115
    size_t listIndex = 0;
    size_t listLength = 0;
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129

    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__);
}
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140

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

1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162
/**
 * 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)
{
1163 1164
    oc_mutex_assert_owner(g_sslContextMutex, true);

1165
    VERIFY_NON_NULL_VOID(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL");
1166
    VERIFY_NON_NULL_VOID(endpoint, NET_SSL_TAG, "endpoint");
1167

1168 1169
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
    for (size_t listIndex = 0; listIndex < listLength; listIndex++)
1170
    {
1171
        SslEndPoint_t * tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, listIndex);
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184
        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;
        }
    }
}
1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202

 /**
  * 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)
{
1203
    OC_UNUSED(str);
1204
    OC_UNUSED(msg);
1205

1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226
    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))
    {
Oleksandr Dmytrenko's avatar
Oleksandr Dmytrenko committed
1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238
        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);
        }
1239 1240

        // Make a copy of the endpoint, because the callback might
1241
        // free the peer object, during notifySubscriber() below.
1242 1243
        CAEndpoint_t removedEndpoint = (peer)->sep.endpoint;

1244
        oc_mutex_lock(g_sslContextMutex);
1245 1246 1247

        if (MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO != ret)
        {
1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259
            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);
            }
1260 1261
        }

1262
        RemovePeerFromList(&removedEndpoint);
1263 1264

        oc_mutex_unlock(g_sslContextMutex);
1265 1266 1267 1268 1269 1270
        return false;
    }

    return true;
}

1271 1272 1273
/**
 * Deletes session list.
 */
1274
static void DeletePeerList(void)
1275
{
1276 1277
    oc_mutex_assert_owner(g_sslContextMutex, true);

1278 1279
    VERIFY_NON_NULL_VOID(g_caSslContext, NET_SSL_TAG, "SSL Context is NULL");

1280 1281
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
    for (size_t listIndex = 0; listIndex < listLength; listIndex++)
1282
    {
1283
        SslEndPoint_t * tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, listIndex);
1284 1285 1286 1287
        if (NULL == tep)
        {
            continue;
        }
Dmitriy Zhuravlev's avatar
Dmitriy Zhuravlev committed
1288 1289 1290 1291 1292 1293 1294 1295 1296
        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);
        }
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
        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;
}
1335

1336
void CAcloseSslConnectionAll(CATransportAdapter_t transportType)
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346
{
    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;
    }

1347
    size_t listLength = u_arraylist_length(g_caSslContext->peerList);
1348
    OIC_LOG_V(DEBUG, NET_SSL_TAG,
1349 1350
            "Required transport [%d], peer count [%" PRIuPTR "]", transportType, listLength);
    for (size_t i = listLength; i > 0; i--)
1351
    {
1352
        SslEndPoint_t *tep = (SslEndPoint_t *)u_arraylist_get(g_caSslContext->peerList, i - 1);
1353 1354 1355 1356
        if (NULL == tep)
        {
            continue;
        }
1357 1358 1359 1360 1361 1362 1363 1364 1365
        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;
        }
1366 1367 1368 1369 1370 1371 1372 1373 1374

        // 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);*/

1375 1376
        // delete from list
        u_arraylist_remove(g_caSslContext->peerList, i - 1);
1377 1378 1379 1380 1381 1382 1383
        DeleteSslEndPoint(tep);
    }
    oc_mutex_unlock(g_sslContextMutex);

    OIC_LOG_V(DEBUG, NET_SSL_TAG, "Out %s", __func__);
    return;
}
1384 1385 1386 1387