static CFStringRef
decryptString(SecKeyRef wrapKey, CFDataRef iv, CFDataRef wrappedPassword)
{
CFStringRef retval = NULL;
CFDataRef retData = NULL;
CFErrorRef error = NULL;
SecTransformRef decryptTrans = SecDecryptTransformCreate(wrapKey, &error);
if(error == NULL) {
SecTransformRef group = SecTransformCreateGroupTransform();
SecTransformRef decodeTrans = SecDecodeTransformCreate(kSecBase64Encoding, &error);
if(error == NULL) SecTransformSetAttribute(decodeTrans, kSecTransformInputAttributeName, wrappedPassword, &error);
if(error == NULL) SecTransformSetAttribute(decryptTrans, kSecEncryptionMode, kSecModeCBCKey, &error);
if(error == NULL) SecTransformSetAttribute(decryptTrans, kSecPaddingKey, kSecPaddingPKCS7Key, &error);
if(error == NULL) SecTransformSetAttribute(decryptTrans, kSecIVKey, iv, &error);
SecTransformConnectTransforms(decodeTrans, kSecTransformOutputAttributeName, decryptTrans, kSecTransformInputAttributeName, group, &error);
CFRelease(decodeTrans);
CFRelease(decryptTrans);
if(error == NULL) retData = SecTransformExecute(group, &error);
if(error == NULL) retval = CFStringCreateFromExternalRepresentation(kCFAllocatorDefault, retData, kCFStringEncodingMacRoman);
else secDebug(ASL_LEVEL_ERR, "Failed to decrypt recovery password\n", NULL);
CFRelease(group);
}
return retval;
}
void CryptoOperationImpl::initialize()
{
if (m_signingTransform)
{
// We have already initialized the signing transform
return;
}
m_signingTransform = SecSignTransformCreate(getKeyRef(), NULL);
SecTransformSetAttribute(m_signingTransform, kSecInputIsDigest, kCFBooleanTrue, NULL);
SecTransformSetAttribute(m_signingTransform, kSecDigestTypeAttribute, kSecDigestSHA1, NULL);
}
static dispatch_data_t
execute_sectransform(SecTransformRef transformRef, dispatch_data_t data)
{
const void * bytes;
size_t size;
dispatch_data_t map = dispatch_data_create_map(data, &bytes, &size);
assert(map);
CFDataRef dataRef = CFDataCreate(kCFAllocatorDefault, bytes, size);
assert(dataRef);
dispatch_release(map);
SecTransformSetAttribute(transformRef, kSecTransformInputAttributeName, dataRef, NULL);
CFDataRef transformedDataRef = SecTransformExecute(transformRef, NULL);
assert(transformedDataRef);
CFRelease(dataRef);
dispatch_data_t output = dispatch_data_create(CFDataGetBytePtr(transformedDataRef), CFDataGetLength(transformedDataRef), dispatch_get_main_queue(), DISPATCH_DATA_DESTRUCTOR_DEFAULT);
CFRelease(transformedDataRef);
return output;
}
TagLib::ByteVector TagLib::EncodeBase64(const TagLib::ByteVector& input)
{
ByteVector result;
CFErrorRef error;
SFB::SecTransform encoder = SecEncodeTransformCreate(kSecBase64Encoding, &error);
if(nullptr == encoder) {
LOGGER_WARNING("org.sbooth.AudioEngine", "SecEncodeTransformCreate failed: " << error);
return TagLib::ByteVector::null;
}
SFB::CFData sourceData = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (const UInt8 *)input.data(), (CFIndex)input.size(), kCFAllocatorNull);
if(!sourceData)
return TagLib::ByteVector::null;
if(!SecTransformSetAttribute(encoder, kSecTransformInputAttributeName, sourceData, &error)) {
LOGGER_WARNING("org.sbooth.AudioEngine", "SecTransformSetAttribute failed: " << error);
return TagLib::ByteVector::null;
}
SFB::CFData encodedData = (CFDataRef)SecTransformExecute(encoder, &error);
if(!encodedData) {
LOGGER_WARNING("org.sbooth.AudioEngine", "SecTransformExecute failed: " << error);
return TagLib::ByteVector::null;
}
result.setData((const char *)CFDataGetBytePtr((CFDataRef)encodedData), (TagLib::uint)CFDataGetLength((CFDataRef)encodedData));
return result;
}
static CFDataRef
b64decode(CFDataRef input)
{
CFDataRef retval = NULL;
CFErrorRef error = NULL;
SecTransformRef decodeTrans = SecDecodeTransformCreate(kSecBase64Encoding, &error);
if(error == NULL) SecTransformSetAttribute(decodeTrans, kSecTransformInputAttributeName, input, &error);
if(error == NULL) retval = SecTransformExecute(decodeTrans, &error);
if(decodeTrans) CFRelease(decodeTrans);
return retval;
}
void CryptoOperationImpl::processImpl(const char *buffer, unsigned long size)
{
initialize();
CFErrorRef error = NULL;
CFDataRef dataRef = CFDataCreate(kCFAllocatorDefault, (UInt8*)buffer, size);
//TODO doesn't seems to work, it looks like only the first kSecTransformInputAttributeName is used.
SecTransformSetAttribute(m_signingTransform,
kSecTransformInputAttributeName, dataRef, &error);
if (NULL != error)
{
CFRelease(m_signingTransform);
m_signingTransform = NULL;
FireJSEvent("onabort", FB::VariantMap(), FB::variant_list_of());
}
}
static inline String base64(const String& input)
{
#ifdef OS_Darwin
String result;
SecTransformRef transform = SecEncodeTransformCreate(kSecBase64Encoding, 0);
CFDataRef sourceData = CFDataCreate(kCFAllocatorDefault,
reinterpret_cast<const UInt8*>(input.constData()),
input.size());
SecTransformSetAttribute(transform, kSecTransformInputAttributeName, sourceData, 0);
CFDataRef encodedData = static_cast<CFDataRef>(SecTransformExecute(transform, 0));
const long len = CFDataGetLength(encodedData);
if (len > 0) {
result.resize(len);
CFDataGetBytes(encodedData, CFRangeMake(0, len), reinterpret_cast<UInt8*>(result.data()));
}
CFRelease(encodedData);
CFRelease(transform);
CFRelease(sourceData);
#else
BIO *base64_filter = BIO_new(BIO_f_base64());
BIO_set_flags(base64_filter, BIO_FLAGS_BASE64_NO_NL);
BIO *bio = BIO_new(BIO_s_mem());
BIO_set_flags(bio, BIO_FLAGS_BASE64_NO_NL);
bio = BIO_push(base64_filter, bio);
BIO_write(bio, input.constData(), input.size());
BIO_flush(bio);
char *new_data;
const long bytes_written = BIO_get_mem_data(bio, &new_data);
String result(new_data, bytes_written);
BIO_free_all(bio);
#endif
return result;
}
static int32_t ExecuteOaepTransform(SecTransformRef xform,
uint8_t* pbData,
int32_t cbData,
PAL_HashAlgorithm algorithm,
CFDataRef* pDataOut,
CFErrorRef* pErrorOut)
{
if (!SecTransformSetAttribute(xform, kSecPaddingKey, kSecPaddingOAEPKey, pErrorOut))
{
return kErrorSeeError;
}
// Documentation mentions kSecOAEPMGF1DigestAlgorithmAttributeName, but on the Apple platform
// "SHA2" is an algorithm and the size is encoded separately. Since there doesn't seem to be
// a second attribute to encode SHA2-256 vs SHA2-384, be limited to SHA-1.
if (algorithm != PAL_SHA1)
{
return kErrorUnknownAlgorithm;
}
return ExecuteCFDataTransform(xform, pbData, cbData, pDataOut, pErrorOut);
}
static CFDataRef
digestString(CFStringRef str)
{
CFDataRef retval = NULL;
CFErrorRef error = NULL;
CFDataRef inputString = CFStringCreateExternalRepresentation(kCFAllocatorDefault, str, kCFStringEncodingUTF8, 0xff);
SecTransformRef digestTrans = SecDigestTransformCreate(kSecDigestSHA2, 256, &error);
if(error == NULL) {
SecTransformSetAttribute(digestTrans, kSecTransformInputAttributeName, inputString, &error);
if(error == NULL) {
retval = SecTransformExecute(digestTrans, &error);
if(retval == NULL) {
secDebug(ASL_LEVEL_ERR, "Couldn't create digest %s\n", CFStringGetCStringPtr(CFErrorCopyFailureReason(error), kCFStringEncodingUTF8));
}
}
CFRelease(digestTrans);
}
CFRelease(inputString);
return retval;
}
CFStringRef
SecCreateRecoveryPassword(void)
{
CFStringRef result = NULL;
CFErrorRef error = NULL;
CFDataRef encodedData = NULL;
CFDataRef randData = getRandomBytes(16);
int i;
// base32FDE is a "private" base32 encoding, it has no 0/O or L/l/1 in it (it uses 8 and 9).
SecTransformRef encodeTrans = SecEncodeTransformCreate(CFSTR("base32FDE"), &error);
if(error == NULL) {
SecTransformSetAttribute(encodeTrans, kSecTransformInputAttributeName, randData, &error);
if(error == NULL) encodedData = SecTransformExecute(encodeTrans, &error);
CFRelease(encodeTrans);
}
CFRelease(randData);
if(encodedData != NULL && error == NULL) {
CFStringRef b32string = CFStringCreateFromExternalRepresentation(kCFAllocatorDefault, encodedData, kCFStringEncodingMacRoman);
CFMutableStringRef encodedString = CFStringCreateMutableCopy(kCFAllocatorDefault, 64, b32string);
// Add some hyphens to make the generated password easier to use
for(i = 4; i < 34; i += 5) CFStringInsert(encodedString, i, CFSTR("-"));
// Trim so the last section is 4 characters long
CFStringDelete(encodedString, CFRangeMake(29,CFStringGetLength(encodedString)-29));
result = CFStringCreateCopy(kCFAllocatorDefault, encodedString);
CFRelease(encodedString);
CFRelease(b32string);
CFRelease(encodedData);
} else {
secDebug(ASL_LEVEL_ERR, "Failed to base32 encode random data for recovery password\n", NULL);
}
return result;
}
TagLib::ByteVector TagLib::DecodeBase64(const TagLib::ByteVector& input)
{
SFB::CFError error;
SFB::SecTransform decoder(SecDecodeTransformCreate(kSecBase64Encoding, &error));
if(!decoder) {
LOGGER_WARNING("org.sbooth.AudioEngine", "SecDecodeTransformCreate failed: " << error);
return {};
}
SFB::CFData sourceData(CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (const UInt8 *)input.data(), (CFIndex)input.size(), kCFAllocatorNull));
if(!sourceData)
return {};
if(!SecTransformSetAttribute(decoder, kSecTransformInputAttributeName, sourceData, &error)) {
LOGGER_WARNING("org.sbooth.AudioEngine", "SecTransformSetAttribute failed: " << error);
return {};
}
SFB::CFData decodedData((CFDataRef)SecTransformExecute(decoder, &error));
if(!decodedData)
return {};
return {(const char *)CFDataGetBytePtr((CFDataRef)decodedData), (size_t)CFDataGetLength((CFDataRef)decodedData)};
}
TagLib::ByteVector TagLib::EncodeBase64(const TagLib::ByteVector& input)
{
#if USE_SECURITY_FRAMEWORK
ByteVector result;
CFErrorRef error;
SecTransformRef encoder = SecEncodeTransformCreate(kSecBase64Encoding, &error);
if(nullptr == encoder) {
CFShow(error);
return TagLib::ByteVector::null;
}
CFDataRef sourceData = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (const UInt8 *)input.data(), input.size(), kCFAllocatorNull);
if(nullptr == sourceData) {
CFRelease(encoder), encoder = nullptr;
return TagLib::ByteVector::null;
}
if(!SecTransformSetAttribute(encoder, kSecTransformInputAttributeName, sourceData, &error)) {
CFShow(error);
CFRelease(sourceData), sourceData = nullptr;
CFRelease(encoder), encoder = nullptr;
return TagLib::ByteVector::null;
}
CFTypeRef encodedData = SecTransformExecute(encoder, &error);
if(nullptr == encodedData) {
CFShow(error);
CFRelease(sourceData), sourceData = nullptr;
CFRelease(encoder), encoder = nullptr;
return TagLib::ByteVector::null;
}
result.setData((const char *)CFDataGetBytePtr((CFDataRef)encodedData), (TagLib::uint)CFDataGetLength((CFDataRef)encodedData));
CFRelease(encodedData), encodedData = nullptr;
CFRelease(sourceData), sourceData = nullptr;
CFRelease(encoder), encoder = nullptr;
return result;
#else
ByteVector result;
BIO *b64 = BIO_new(BIO_f_base64());
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
BIO *bio = BIO_new(BIO_s_mem());
bio = BIO_push(b64, bio);
BIO_write(bio, input.data(), input.size());
(void)BIO_flush(bio);
void *mem = nullptr;
long size = BIO_get_mem_data(bio, &mem);
if(0 < size)
result.setData(static_cast<const char *>(mem), static_cast<uint>(size));
BIO_free_all(bio);
return result;
#endif
}
CFStringRef APPEMKeyCreateFromHexKey(CFStringRef hexKey)
{
// Convert a raw 1024 bit key to a PEM formatted string that includes the headers
// -----BEGIN RSA PUBLIC KEY-----
// (base64 ASN1 encoded data here)
// -----END RSA PUBLIC KEY-----
uint8_t raw1[] = {
0x30, 0x81, 0x9F, // SEQUENCE length 0x9F
0x30, 0x0D, // SEQUENCE length 0x0D
0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, // rsaEncryption, PKCS #1
0x05, 0x00, // NULL
0x03, 0x81, 0x8D, 0x00, // BIT STRING, length 0x8D
0x30, 0x81, 0x89, // SEQUENCE length 0x89
0x02, 0x81, 0x81, // INTEGER length 0x81
0x00 // MSB = zero to make sure INTEGER is positively signed
};
uint8_t raw2[] = {
0x02, 0x03, 0x00, 0x00, 0x03 // INTEGER length 3, value = 0x03 (RSA exponent)
};
// Munch through the hex string, taking two characters at a time for each byte
// to append as the key data
CFDataRef rawKey = APCopyDataFromHexString(hexKey);
if (rawKey == NULL) {
// Failed to import the key (bad hex digit?)
CFShow(CFSTR("Bad public key?"));
return NULL;
}
CFMutableDataRef keyData = CFDataCreateMutable(kCFAllocatorDefault, 0);
CFDataAppendBytes(keyData, raw1, sizeof(raw1)/sizeof(uint8_t));
const UInt8 *rawKeyBuffer = CFDataGetBytePtr(rawKey);
CFDataAppendBytes(keyData, rawKeyBuffer, CFDataGetLength(rawKey));
CFRelease(rawKey);
CFDataAppendBytes(keyData, raw2, sizeof(raw2)/sizeof(uint8_t));
// Just need to base64 encode this data now and wrap the string
// in the BEGIN/END RSA PUBLIC KEY
CFErrorRef error = NULL;
SecTransformRef encoder = SecEncodeTransformCreate(kSecBase64Encoding, &error);
if (error != NULL) {
CFShow(error);
if (encoder) {
CFRelease(encoder);
}
if (keyData) {
CFRelease(keyData);
}
return NULL;
}
SecTransformSetAttribute(encoder,
kSecTransformInputAttributeName,
keyData,
&error);
if (error != NULL) {
CFRelease(encoder);
if (keyData) {
CFRelease(keyData);
}
CFShow(error);
return NULL;
}
CFDataRef encodedKeyData = SecTransformExecute(encoder, &error);
const UInt8 *keyDataBuffer = CFDataGetBytePtr(encodedKeyData);
CFStringRef keyDataString = CFStringCreateWithBytes(kCFAllocatorDefault,
keyDataBuffer,
CFDataGetLength(encodedKeyData),
kCFStringEncodingUTF8,
false);
CFRelease(encodedKeyData);
CFRelease(encoder);
CFRelease(keyData);
CFStringRef beginRSAKey = CFSTR("-----BEGIN RSA PUBLIC KEY-----");
CFStringRef endRSAKey = CFSTR("-----END RSA PUBLIC KEY-----");
CFStringRef pemKey = CFStringCreateWithFormat(kCFAllocatorDefault,
NULL,
CFSTR("%@\n%@\n%@"),
beginRSAKey,
keyDataString,
endRSAKey);
CFRelease(keyDataString);
return pemKey;
}
CFDataRef APCreateHashFromDictionary(CFDictionaryRef dict)
{
__block CFErrorRef error = NULL;
__block SecTransformRef hashFunction = NULL;
void(^cleanup)(void) = ^(void) {
if (error != NULL) {
CFShow(error);
CFRelease(error);
error = NULL;
}
if (hashFunction != NULL) {
CFRelease(hashFunction);
hashFunction = NULL;
}
};
// Get the number of elements
CFIndex count = CFDictionaryGetCount(dict);
// Load the keys and build up the key array
CFMutableArrayRef keyArray = CFArrayCreateMutable(kCFAllocatorDefault, count, NULL);
CFStringRef keys[count];
CFDictionaryGetKeysAndValues(dict, (const void**)&keys, NULL);
for (int idx = 0; idx < count; idx++)
{
// Skip the signature key
if (CFStringCompare(keys[idx], CFSTR("Signature"), 0) == kCFCompareEqualTo) {
continue;
}
CFArrayAppendValue(keyArray, keys[idx]);
}
// Sort the array
int context = kCFCompareCaseInsensitive;
CFArraySortValues(keyArray, CFRangeMake(0, count-1), (CFComparatorFunction)CFStringCompare, &context);
// Build the data
CFMutableDataRef dictData = CFDataCreateMutable(kCFAllocatorDefault, 0);
int keyCount = CFArrayGetCount(keyArray);
for (int keyIndex = 0; keyIndex < keyCount; keyIndex++)
{
CFStringRef key = CFArrayGetValueAtIndex(keyArray, keyIndex);
CFStringRef value = CFDictionaryGetValue(dict, key);
CFDataRef valueData = CFStringCreateExternalRepresentation(kCFAllocatorDefault,
value,
kCFStringEncodingUTF8,
0);
const UInt8 *valueBuffer = CFDataGetBytePtr(valueData);
CFDataAppendBytes(dictData, valueBuffer, CFDataGetLength(valueData));
CFRelease(valueData);
}
// Hash the data
hashFunction = SecDigestTransformCreate(kSecDigestSHA1, 0, &error);
if (error != NULL) {
CFRelease(dictData);
cleanup();
return NULL;
}
SecTransformSetAttribute(hashFunction,
kSecTransformInputAttributeName,
dictData,
&error);
CFDataRef hashData = SecTransformExecute(hashFunction, &error);
CFRelease(dictData);
if (error != NULL) {
cleanup();
if (hashData) {
CFRelease(hashData);
}
return NULL;
}
cleanup();
return hashData;
}
CFDictionaryRef APCreateDictionaryForLicenseData(CFDataRef data)
{
__block CFPropertyListRef propertyList = NULL;
__block CFDataRef hashData = NULL;
__block CFErrorRef error = NULL;
__block SecTransformRef verifyFunction = NULL;
__block CFBooleanRef valid = NULL;
void(^cleanup)(void) = ^(void) {
if (propertyList != NULL) {
CFRelease(propertyList);
propertyList = NULL;
}
if (hashData != NULL) {
CFRelease(hashData);
hashData = NULL;
}
if (error != NULL) {
CFShow(error);
CFRelease(error);
error = NULL;
}
if (verifyFunction != NULL) {
CFRelease(verifyFunction);
verifyFunction = NULL;
}
if (valid != NULL) {
CFRelease(valid);
valid = NULL;
}
};
if (!publicKeyRef) {
CFShow(CFSTR("Public key is invalid"));
return NULL;
}
// Make the property list from the data
CFStringRef errorString = NULL;
propertyList = CFPropertyListCreateFromXMLData(kCFAllocatorDefault, data, kCFPropertyListMutableContainers, &errorString);
if (errorString || CFDictionaryGetTypeID() != CFGetTypeID(propertyList) || !CFPropertyListIsValid(propertyList, kCFPropertyListXMLFormat_v1_0)) {
if (propertyList)
CFRelease(propertyList);
return NULL;
}
CFMutableDictionaryRef licenseDictionary = (CFMutableDictionaryRef)propertyList;
CFDataRef signature = CFDictionaryGetValue(licenseDictionary, CFSTR("Signature"));
if (!signature) {
CFShow(CFSTR("No signature"));
cleanup();
return NULL;
}
hashData = APCreateHashFromDictionary(licenseDictionary);
CFStringRef hashCheck = APCopyHexStringFromData(hashData);
APSetHash(hashCheck);
CFRelease(hashCheck);
// Check the hash against license blacklist
if (blacklist && CFArrayContainsValue(blacklist, CFRangeMake(0, CFArrayGetCount(blacklist)), hash)) {
cleanup();
return NULL;
}
// Verify the signed hash using the public key, passing the raw hash data as the input
verifyFunction = SecVerifyTransformCreate(publicKeyRef, signature, &error);
if (error) {
cleanup();
return NULL;
}
SecTransformSetAttribute(verifyFunction,
kSecTransformInputAttributeName,
hashData,
&error);
if (error) {
cleanup();
return NULL;
}
SecTransformSetAttribute(verifyFunction,
kSecInputIsAttributeName,
kSecInputIsRaw,
&error);
if (error) {
cleanup();
return NULL;
}
valid = SecTransformExecute(verifyFunction, &error);
if (error) {
cleanup();
return NULL;
}
if (valid != kCFBooleanTrue) {
cleanup();
return NULL;
}
CFDictionaryRef resultDict = CFDictionaryCreateCopy(kCFAllocatorDefault, licenseDictionary);
cleanup();
return resultDict;
}
static int32_t ExecuteCFDataTransform(
SecTransformRef xform, uint8_t* pbData, int32_t cbData, CFDataRef* pDataOut, CFErrorRef* pErrorOut)
{
if (xform == nullptr || pbData == nullptr || cbData < 0 || pDataOut == nullptr || pErrorOut == nullptr)
{
return kErrorBadInput;
}
*pDataOut = nullptr;
*pErrorOut = nullptr;
CFTypeRef xformOutput = nullptr;
CFDataRef cfData = nullptr;
int32_t ret = INT_MIN;
cfData = CFDataCreateWithBytesNoCopy(nullptr, pbData, cbData, kCFAllocatorNull);
if (cfData == nullptr)
{
// This probably means that there wasn't enough memory available, but no
// particular failure cases are described.
return kErrorUnknownState;
}
if (!SecTransformSetAttribute(xform, kSecTransformInputAttributeName, cfData, pErrorOut))
{
ret = kErrorSeeError;
goto cleanup;
}
xformOutput = SecTransformExecute(xform, pErrorOut);
if (xformOutput == nullptr || *pErrorOut != nullptr)
{
ret = kErrorSeeError;
goto cleanup;
}
if (CFGetTypeID(xformOutput) == CFDataGetTypeID())
{
CFDataRef cfDataOut = reinterpret_cast<CFDataRef>(const_cast<void*>(xformOutput));
CFRetain(cfDataOut);
*pDataOut = cfDataOut;
ret = 1;
}
else
{
ret = kErrorUnknownState;
}
cleanup:
if (xformOutput != nullptr)
{
CFRelease(xformOutput);
}
if (cfData != nullptr)
{
CFRelease(cfData);
}
return ret;
}
TagLib::ByteVector TagLib::DecodeBase64(const TagLib::ByteVector& input)
{
#if USE_SECURITY_FRAMEWORK
ByteVector result;
CFErrorRef error;
SecTransformRef decoder = SecDecodeTransformCreate(kSecBase64Encoding, &error);
if(nullptr == decoder) {
CFShow(error);
return TagLib::ByteVector::null;
}
CFDataRef sourceData = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (const UInt8 *)input.data(), input.size(), kCFAllocatorNull);
if(nullptr == sourceData) {
CFRelease(decoder), decoder = nullptr;
return TagLib::ByteVector::null;
}
if(!SecTransformSetAttribute(decoder, kSecTransformInputAttributeName, sourceData, &error)) {
CFShow(error);
CFRelease(sourceData), sourceData = nullptr;
CFRelease(decoder), decoder = nullptr;
return TagLib::ByteVector::null;
}
CFTypeRef decodedData = SecTransformExecute(decoder, &error);
if(nullptr == decodedData) {
CFShow(error);
CFRelease(sourceData), sourceData = nullptr;
CFRelease(decoder), decoder = nullptr;
return TagLib::ByteVector::null;
}
result.setData((const char *)CFDataGetBytePtr((CFDataRef)decodedData), (TagLib::uint)CFDataGetLength((CFDataRef)decodedData));
CFRelease(decodedData), decodedData = nullptr;
CFRelease(sourceData), sourceData = nullptr;
CFRelease(decoder), decoder = nullptr;
return result;
#else
ByteVector result;
BIO *b64 = BIO_new(BIO_f_base64());
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
BIO *bio = BIO_new_mem_buf(reinterpret_cast<void *>(const_cast<char *>(input.data())), input.size());
bio = BIO_push(b64, bio);
char inbuf [512];
int inlen;
while(0 < (inlen = BIO_read(bio, inbuf, 512)))
result.append(ByteVector(inbuf, inlen));
BIO_free_all(bio);
return result;
#endif
}