C++ parcBuffer_Allocate函数代码示例

LONGBOW_TEST_CASE(Global, ccnxInterest_Equals)
{
    CCNxName *nameA = ccnxName_CreateFromURI("lci:/name");
    PARCBuffer *keyA = parcBuffer_Allocate(8);
    parcBuffer_PutUint64(keyA, 1234L);

    CCNxInterest *interestA = ccnxInterest_Create(nameA,
                                                  1000, /* lifetime */
                                                  keyA, /* KeyId */
                                                  NULL  /* ContentObjectHash */
                                                  );

    CCNxName *nameB = ccnxName_CreateFromURI("lci:/name");
    PARCBuffer *keyB = parcBuffer_Allocate(8);
    parcBuffer_PutUint64(keyB, 1234L);
    CCNxInterest *interestB = ccnxInterest_Create(nameB,
                                                  1000, /* lifetime */
                                                  keyB, /* KeyId */
                                                  NULL  /* ContentObjectHash */
                                                  );

    assertTrue(ccnxInterest_Equals(interestA, interestB), "Expected equivalent interests to be equal.");

    ccnxName_Release(&nameA);
    ccnxName_Release(&nameB);
    parcBuffer_Release(&keyA);
    parcBuffer_Release(&keyB);
    ccnxInterest_Release(&interestA);
    ccnxInterest_Release(&interestB);
}

LONGBOW_TEST_CASE(Global, parcSignature_Equals)
{
    PARCBuffer *bits = parcBuffer_Allocate(10); // arbitrary bufer size -- not important
    PARCBuffer *otherBits = parcBuffer_Allocate(strlen("hello"));
    parcBuffer_PutArray(otherBits, strlen("hello"), (uint8_t *) "hello");

    PARCSignature *x = parcSignature_Create(PARCSigningAlgorithm_DSA, PARC_HASH_SHA256, bits);
    PARCSignature *y = parcSignature_Create(PARCSigningAlgorithm_DSA, PARC_HASH_SHA256, bits);
    PARCSignature *z = parcSignature_Create(PARCSigningAlgorithm_DSA, PARC_HASH_SHA256, bits);
    PARCSignature *unequal1 = parcSignature_Create(PARCSigningAlgorithm_HMAC, PARC_HASH_SHA256, bits);
    PARCSignature *unequal2 = parcSignature_Create(PARCSigningAlgorithm_DSA, PARC_HASH_CRC32C, bits);
    PARCSignature *unequal3 = parcSignature_Create(PARCSigningAlgorithm_DSA, PARC_HASH_SHA256, otherBits);

    parcObjectTesting_AssertEqualsFunction(parcSignature_Equals, x, y, z, unequal1, unequal2, unequal3, NULL);

    parcSignature_Release(&x);
    parcSignature_Release(&y);
    parcSignature_Release(&z);
    parcSignature_Release(&unequal1);
    parcSignature_Release(&unequal2);
    parcSignature_Release(&unequal3);

    parcBuffer_Release(&bits);
    parcBuffer_Release(&otherBits);
}

LONGBOW_TEST_CASE(Global, ccnxLink_Equals)
{
    CCNxName *name = ccnxName_CreateFromCString("lci:/foo/bar/name");
    PARCBuffer *keyId = parcBuffer_Allocate(10);
    PARCBuffer *contentObjectHash = parcBuffer_Allocate(20);
    CCNxLink *x = ccnxLink_Create(name, keyId, contentObjectHash);
    ccnxName_Release(&name);
    parcBuffer_Release(&keyId);
    parcBuffer_Release(&contentObjectHash);

    name = ccnxName_CreateFromCString("lci:/foo/bar/name");
    keyId = parcBuffer_Allocate(10);
    contentObjectHash = parcBuffer_Allocate(20);
    CCNxLink *y = ccnxLink_Create(name, keyId, contentObjectHash);
    ccnxName_Release(&name);
    parcBuffer_Release(&keyId);
    parcBuffer_Release(&contentObjectHash);

    name = ccnxName_CreateFromCString("lci:/foo/bar/name");
    keyId = parcBuffer_Allocate(10);
    contentObjectHash = parcBuffer_Allocate(20);
    CCNxLink *z = ccnxLink_Create(name, keyId, contentObjectHash);
    ccnxName_Release(&name);
    parcBuffer_Release(&keyId);
    parcBuffer_Release(&contentObjectHash);

    name = ccnxName_CreateFromCString("lci:/foo/bar/othername");
    keyId = parcBuffer_Allocate(10);
    contentObjectHash = parcBuffer_Allocate(20);
    CCNxLink *unequal1 = ccnxLink_Create(name, keyId, contentObjectHash);
    ccnxName_Release(&name);
    parcBuffer_Release(&keyId);
    parcBuffer_Release(&contentObjectHash);

    name = ccnxName_CreateFromCString("lci:/foo/bar/name");
    keyId = NULL;
    contentObjectHash = parcBuffer_Allocate(20);
    CCNxLink *unequal2 = ccnxLink_Create(name, keyId, contentObjectHash);
    ccnxName_Release(&name);
    parcBuffer_Release(&contentObjectHash);

    name = ccnxName_CreateFromCString("lci:/foo/bar/name");
    keyId = parcBuffer_Allocate(10);
    contentObjectHash = NULL;
    CCNxLink *unequal3 = ccnxLink_Create(name, keyId, contentObjectHash);
    ccnxName_Release(&name);
    parcBuffer_Release(&keyId);

    assertEqualsContract(ccnxLink_Equals, x, y, z, unequal1, unequal2, unequal3);

    ccnxLink_Release(&x);
    ccnxLink_Release(&y);
    ccnxLink_Release(&z);
    ccnxLink_Release(&unequal1);
    ccnxLink_Release(&unequal2);
    ccnxLink_Release(&unequal3);
}

LONGBOW_TEST_CASE(Local, _athenaLRUContentStore_GetMatchByName)
{
    AthenaLRUContentStore *impl = _createLRUContentStore();

    PARCBuffer *payload = parcBuffer_Allocate(500);

    CCNxName *name = ccnxName_CreateFromURI("lci:/boose/roo/pie");
    CCNxContentObject *contentObject = ccnxContentObject_CreateWithDataPayload(name, payload);
    parcBuffer_Release(&payload);

    bool status = _athenaLRUContentStore_PutContentObject(impl, contentObject);
    assertTrue(status, "Expected to put content into the store");

    PARCBuffer *payload2 = parcBuffer_Allocate(500);
    CCNxName *name2 = ccnxName_CreateFromURI("lci:/roo/pie/boose");
    CCNxContentObject *contentObject2 = ccnxContentObject_CreateWithDataPayload(name2, payload2);
    parcBuffer_Release(&payload2);

    bool status2 = _athenaLRUContentStore_PutContentObject(impl, contentObject2);
    assertTrue(status2, "Expected to put content into the store");

    // At this point, both objects should be in the store.
    athenaLRUContentStore_Display(impl, 2);

    assertTrue(impl->stats.numAdds == 2, "Expected 2 store adds");

    // Now try to fetch each of them.

    CCNxInterest *interest1 = ccnxInterest_CreateSimple(name);
    CCNxContentObject *match = _athenaLRUContentStore_GetMatch(impl, interest1);
    assertTrue(match == contentObject, "Expected to match the first content object");

    CCNxInterest *interest2 = ccnxInterest_CreateSimple(name2);
    CCNxContentObject *match2 = _athenaLRUContentStore_GetMatch(impl, interest2);
    assertTrue(match2 == contentObject2, "Expected to match the second content object");

    // Now try to match a non-existent name.
    CCNxName *nameNoMatch = ccnxName_CreateFromURI("lci:/pie/roo/boose/this/should/not/match");
    CCNxInterest *interest3 = ccnxInterest_CreateSimple(nameNoMatch);
    CCNxContentObject *noMatch = _athenaLRUContentStore_GetMatch(impl, interest3);
    assertNull(noMatch, "Expected a NULL response from an unmatchable name");

    ccnxInterest_Release(&interest1);
    ccnxInterest_Release(&interest2);
    ccnxInterest_Release(&interest3);
    ccnxName_Release(&nameNoMatch);
    ccnxName_Release(&name);
    ccnxName_Release(&name2);
    ccnxContentObject_Release(&contentObject);
    ccnxContentObject_Release(&contentObject2);

    _athenaLRUContentStore_Release((AthenaContentStoreImplementation *) &impl);
}

CCNxInterestPayloadId *
ccnxInterestPayloadId_CreateAsSHA256Hash(const PARCBuffer *data)
{
    CCNxInterestPayloadId *result = parcObject_CreateInstance(CCNxInterestPayloadId);

    PARCCryptoHasher *hasher = parcCryptoHasher_Create(PARCCryptoHashType_SHA256);
    parcCryptoHasher_Init(hasher);
    parcCryptoHasher_UpdateBuffer(hasher, data);
    PARCCryptoHash *hash = parcCryptoHasher_Finalize(hasher);
    parcCryptoHasher_Release(&hasher);

    PARCBuffer *hashData = parcCryptoHash_GetDigest(hash);
    PARCBuffer *codedHash = parcBuffer_Allocate(parcBuffer_Capacity(hashData) + 1);
    parcBuffer_PutUint8(codedHash, CCNxInterestPayloadId_TypeCode_RFC6920_SHA256);
    parcBuffer_PutBuffer(codedHash, hashData);
    parcBuffer_Flip(codedHash);

    result->nameSegment =
        ccnxNameSegment_CreateTypeValue(CCNxNameLabelType_PAYLOADID, codedHash);

    parcBuffer_Release(&codedHash);
    parcCryptoHash_Release(&hash);

    return result;
}

/**
 * If the user specified a device name, set the MAC address in ether->macAddress
 *
 * <#Paragraphs Of Explanation#>
 *
 * @param [in] ether An allocated MetisGenericEther
 * @param [in] devstr A C-String of the device name
 *
 * Example:
 * @code
 * <#example#>
 * @endcode
 */
static void
_darwinEthernet_SetInterfaceAddress(MetisGenericEther *ether, const char *devstr)
{
    if (devstr) {
        struct ifaddrs *ifaddr;
        int failure = getifaddrs(&ifaddr);
        assertFalse(failure, "Error getifaddrs: (%d) %s", errno, strerror(errno));

        struct ifaddrs *next;
        for (next = ifaddr; next != NULL; next = next->ifa_next) {
            if (strcmp(next->ifa_name, devstr) == 0) {
                if (next->ifa_addr->sa_family == AF_LINK) {
                    struct sockaddr_dl *addr_dl = (struct sockaddr_dl *) next->ifa_addr;

                    // addr_dl->sdl_data[12] contains the interface name followed by the MAC address, so
                    // need to offset in to the array past the interface name.
                    PARCBuffer *addr = parcBuffer_Allocate(addr_dl->sdl_alen);
                    parcBuffer_PutArray(addr, addr_dl->sdl_alen, (uint8_t *) &addr_dl->sdl_data[ addr_dl->sdl_nlen]);
                    parcBuffer_Flip(addr);
                    ether->macAddress = addr;

                    // break out of loop and freeifaddrs
                    break;
                }
            }
        }
        freeifaddrs(ifaddr);
    }
}

static PARCBuffer *
_encodeControlPlaneInformation(const CCNxControl *cpiControlMessage)
{
    PARCJSON *json = ccnxControl_GetJson(cpiControlMessage);
    char *str = parcJSON_ToCompactString(json);

    // include +1 because we need the NULL byte
    size_t len = strlen(str) + 1;

    size_t packetLength = sizeof(_MetisTlvFixedHeaderV0) + sizeof(MetisTlvType) + len;
    PARCBuffer *packet = parcBuffer_Allocate(packetLength);

    _MetisTlvFixedHeaderV0 hdr;
    memset(&hdr, 0, sizeof(hdr));
    hdr.version = 0;
    hdr.packetType = METIS_PACKET_TYPE_CONTROL;
    hdr.payloadLength = htons(len + sizeof(MetisTlvType));

    parcBuffer_PutArray(packet, sizeof(hdr), (uint8_t *) &hdr);

    MetisTlvType tlv = { .type = htons(T_CPI), .length = htons(len) };
    parcBuffer_PutArray(packet, sizeof(tlv), (uint8_t *) &tlv);

    parcBuffer_PutArray(packet, len, (uint8_t *) str);

    parcMemory_Deallocate((void **) &str);
    return parcBuffer_Flip(packet);
}

LONGBOW_TEST_CASE(Object, parcRandomAccessFile_Read)
{
    char *fname = "tmpfile";

    PARCFile *file = parcFile_Create(fname);

    parcFile_CreateNewFile(file);
    FILE *fp = fopen(fname, "w");
    fseek(fp, 0, SEEK_SET);

    uint8_t data[128];
    for (int i = 0; i < 128; i++) {
        data[i] = i;
    }
    fwrite(data, 1, 128, fp);
    fclose(fp);

    PARCRandomAccessFile *instance = parcRandomAccessFile_Open(file);
    parcFile_Release(&file);

    PARCBuffer *buffer = parcBuffer_Allocate(128);
    size_t numBytes = parcRandomAccessFile_Read(instance, buffer);
    assertTrue(numBytes == 128, "Expected 128 bytes to be read, but got %zu", numBytes);

    parcBuffer_Flip(buffer);
    uint8_t *bytes = parcBuffer_Overlay(buffer, parcBuffer_Remaining(buffer));
    assertTrue(memcmp(data, bytes, 128) == 0, "Expected buffers to be equal");

    parcBuffer_Release(&buffer);
    parcRandomAccessFile_Close(instance);
    parcRandomAccessFile_Release(&instance);
}

LONGBOW_TEST_CASE(Global, ccnxContentObject_GetPayloadType)
{
    CCNxName *name = ccnxName_CreateFromCString("lci:/name");
    PARCBuffer *payload = parcBuffer_Allocate(100);

    CCNxPayloadType types[] = {
        CCNxPayloadType_DATA,
        CCNxPayloadType_KEY,
        CCNxPayloadType_LINK,
        CCNxPayloadType_MANIFEST,
    };


    for (int i = 0; i < sizeof(types) / sizeof(CCNxPayloadType); i++) {
        CCNxPayloadType type = types[i];
        CCNxContentObject *contentObject = ccnxContentObject_CreateWithDataPayload(name, NULL);
        ccnxContentObject_SetPayload(contentObject, type, payload);

        assertTrue(ccnxContentObject_GetPayloadType(contentObject) == type, "Unexpected PayloadType");
        ccnxContentObject_Release(&contentObject);
    }

    parcBuffer_Release(&payload);
    ccnxName_Release(&name);
}

static PARCBuffer *
_createDerivedKey(const char *key, size_t keylength, unsigned char *salt, unsigned int saltlen)
{
    unsigned char buffer[SHA256_DIGEST_LENGTH];
    HMAC(EVP_sha256(), key, (int) keylength, salt, saltlen, buffer, NULL);
    return parcBuffer_PutArray(parcBuffer_Allocate(SHA256_DIGEST_LENGTH), SHA256_DIGEST_LENGTH, buffer);
}

LONGBOW_TEST_CASE(Global, parc_Chunker_ReverseIterator_Buffer)
{
    PARCBuffer *buffer = parcBuffer_Allocate(1024);

    for (size_t i = 0; i < 32; i++) {
        for (size_t j = 0; j < 32; j++) {
            parcBuffer_PutUint8(buffer, i);
        }
    }
    parcBuffer_Flip(buffer);

    PARCBufferChunker *chunker = parcBufferChunker_Create(buffer, 32); // each chunk is 32 bytes
    assertNotNull(chunker, "Expected non-NULL Chunker");

    PARCIterator *itr = parcBufferChunker_ReverseIterator(chunker);
    size_t count = 0;
    while (parcIterator_HasNext(itr)) {
        PARCBuffer *payload = (PARCBuffer *) parcIterator_Next(itr);

        uint8_t *contents = parcBuffer_Overlay(payload, 0);
        for (size_t i = 0; i < 32; i++) {
            assertTrue(contents[i] == (31 - count), "Expected %zu at index %zu, got %d", (31 - count), i, contents[i]);
        }
        count++;

        parcBuffer_Release(&payload);
    }
    assertTrue(count == 32, "Expected to iterate over 32 content objects from the chunker, but for %zu", count);
    parcIterator_Release(&itr);

    parcBufferChunker_Release(&chunker);
    parcBuffer_Release(&buffer);
}

static PARCSignature *
_SignDigest(PARCPublicKeySigner *signer, const PARCCryptoHash *digestToSign)
{
    parcSecurity_AssertIsInitialized();

    assertNotNull(signer, "Parameter must be non-null CCNxFileKeystore");
    assertNotNull(digestToSign, "Buffer to sign must not be null");

    // TODO: what is the best way to expose this?
    PARCKeyStore *keyStore = signer->keyStore;
    PARCBuffer *privateKeyBuffer = parcKeyStore_GetDEREncodedPrivateKey(keyStore);
    EVP_PKEY *privateKey = NULL;
    size_t keySize = parcBuffer_Remaining(privateKeyBuffer);
    uint8_t *bytes = parcBuffer_Overlay(privateKeyBuffer, keySize);
    privateKey = d2i_PrivateKey(EVP_PKEY_RSA, &privateKey, (const unsigned char **) &bytes, keySize);
    parcBuffer_Release(&privateKeyBuffer);

    RSA *rsa = EVP_PKEY_get1_RSA(privateKey);

    int opensslDigestType;

    switch (parcCryptoHash_GetDigestType(digestToSign)) {
        case PARCCryptoHashType_SHA256:
            opensslDigestType = NID_sha256;
            break;
        case PARCCryptoHashType_SHA512:
            opensslDigestType = NID_sha512;
            break;
        default:
            trapUnexpectedState("Unknown digest type: %s",
                                parcCryptoHashType_ToString(parcCryptoHash_GetDigestType(digestToSign)));
    }

    uint8_t *sig = parcMemory_Allocate(RSA_size(rsa));
    assertNotNull(sig, "parcMemory_Allocate(%u) returned NULL", RSA_size(rsa));

    unsigned sigLength = 0;
    PARCBuffer *bb_digest = parcCryptoHash_GetDigest(digestToSign);
    int result = RSA_sign(opensslDigestType,
                          (unsigned char *) parcByteArray_Array(parcBuffer_Array(bb_digest)),
                          (int) parcBuffer_Remaining(bb_digest),
                          sig,
                          &sigLength,
                          rsa);
    assertTrue(result == 1, "Got error from RSA_sign: %d", result);
    RSA_free(rsa);

    PARCBuffer *bbSign = parcBuffer_Allocate(sigLength);
    parcBuffer_Flip(parcBuffer_PutArray(bbSign, sigLength, sig));
    parcMemory_Deallocate((void **) &sig);

    PARCSignature *signature =
    parcSignature_Create(_GetSigningAlgorithm(signer),
                         parcCryptoHash_GetDigestType(digestToSign),
                         bbSign
                         );
    parcBuffer_Release(&bbSign);
    return signature;
}

LONGBOW_TEST_CASE(Specialization, parcSecureRandom_CreateWithSeed)
{
    PARCBuffer *seed = parcBuffer_Allocate(1024);
    PARCSecureRandom *rng = parcSecureRandom_CreateWithSeed(seed);

    assertTrue(parcSecureRandom_IsValid(rng), "Expected parcSecureRandom_CreateWithSeed to result in a valid instance.");

    parcSecureRandom_Release(&rng);
    parcBuffer_Release(&seed);
}

/**
 * Create a symmetric (secret) key of the given bit length (e.g. 256)
 *
 * Example:
 * @code
 * <#example#>
 * @endcode
 */
PARCBuffer *
parcSymmetricSignerFileStore_CreateKey(unsigned bits)
{
    assertTrue((bits & 0x07) == 0, "bits must be a multiple of 8");

    unsigned keylength = bits / 8;
    uint8_t buffer[keylength];
    RAND_bytes(buffer, keylength);
    return parcBuffer_Flip(parcBuffer_PutArray(parcBuffer_Allocate(keylength), keylength, buffer));
}

LONGBOW_TEST_CASE(Global, ccnxWireFormatMessage_FromInterestPacketType)
{
    PARCBuffer *buffer = parcBuffer_Allocate(10);
    CCNxWireFormatMessage *message = ccnxWireFormatMessage_FromInterestPacketType(CCNxTlvDictionary_SchemaVersion_V1, buffer);

    assertTrue(ccnxTlvDictionary_IsInterest((CCNxTlvDictionary *) message), "Wrong message type");

    ccnxWireFormatMessage_Release(&message);
    parcBuffer_Release(&buffer);
}