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void of_pbkdf2(OFHMAC *HMAC, size_t iterations,
const unsigned char *salt, size_t saltLength,
const char *password, size_t passwordLength,
unsigned char *key, size_t keyLength)
{
void *pool = objc_autoreleasePoolPush();
size_t blocks, digestSize = [HMAC digestSize];
OFSecureData *buffer = [OFSecureData dataWithCount: digestSize];
OFSecureData *digest = [OFSecureData dataWithCount: digestSize];
unsigned char *bufferItems = [buffer items];
unsigned char *digestItems = [digest items];
OFSecureData *extendedSalt;
unsigned char *extendedSaltItems;
if (HMAC == nil || iterations == 0 || salt == NULL ||
password == NULL || key == NULL || keyLength == 0)
@throw [OFInvalidArgumentException exception];
blocks = keyLength / digestSize;
if (keyLength % digestSize != 0)
blocks++;
if (saltLength > SIZE_MAX - 4 || blocks > UINT32_MAX)
@throw [OFOutOfRangeException exception];
extendedSalt = [OFSecureData dataWithCount: saltLength + 4];
extendedSaltItems = [extendedSalt items];
@try {
uint32_t i = OF_BSWAP32_IF_LE(1);
[HMAC setKey: password
length: passwordLength];
memcpy(extendedSaltItems, salt, saltLength);
while (keyLength > 0) {
size_t length;
memcpy(extendedSaltItems + saltLength, &i, 4);
[HMAC reset];
[HMAC updateWithBuffer: extendedSaltItems
length: saltLength + 4];
memcpy(bufferItems, [HMAC digest], digestSize);
memcpy(digestItems, [HMAC digest], digestSize);
for (size_t j = 1; j < iterations; j++) {
[HMAC reset];
[HMAC updateWithBuffer: digestItems
length: digestSize];
memcpy(digestItems, [HMAC digest], digestSize);
for (size_t k = 0; k < digestSize; k++)
bufferItems[k] ^= digestItems[k];
}
length = digestSize;
if (length > keyLength)
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void of_pbkdf2(OFHMAC *HMAC, size_t iterations,
const unsigned char *salt, size_t saltLength,
const char *password, size_t passwordLength,
unsigned char *key, size_t keyLength)
{
void *pool = objc_autoreleasePoolPush();
size_t blocks, digestSize = HMAC.digestSize;
OFSecureData *buffer = [OFSecureData dataWithCount: digestSize];
OFSecureData *digest = [OFSecureData dataWithCount: digestSize];
unsigned char *bufferItems = buffer.mutableItems;
unsigned char *digestItems = digest.mutableItems;
OFSecureData *extendedSalt;
unsigned char *extendedSaltItems;
if (HMAC == nil || iterations == 0 || salt == NULL ||
password == NULL || key == NULL || keyLength == 0)
@throw [OFInvalidArgumentException exception];
blocks = keyLength / digestSize;
if (keyLength % digestSize != 0)
blocks++;
if (saltLength > SIZE_MAX - 4 || blocks > UINT32_MAX)
@throw [OFOutOfRangeException exception];
extendedSalt = [OFSecureData dataWithCount: saltLength + 4];
extendedSaltItems = extendedSalt.mutableItems;
@try {
uint32_t i = OF_BSWAP32_IF_LE(1);
[HMAC setKey: password
length: passwordLength];
memcpy(extendedSaltItems, salt, saltLength);
while (keyLength > 0) {
size_t length;
memcpy(extendedSaltItems + saltLength, &i, 4);
[HMAC reset];
[HMAC updateWithBuffer: extendedSaltItems
length: saltLength + 4];
memcpy(bufferItems, HMAC.digest, digestSize);
memcpy(digestItems, HMAC.digest, digestSize);
for (size_t j = 1; j < iterations; j++) {
[HMAC reset];
[HMAC updateWithBuffer: digestItems
length: digestSize];
memcpy(digestItems, HMAC.digest, digestSize);
for (size_t k = 0; k < digestSize; k++)
bufferItems[k] ^= digestItems[k];
}
length = digestSize;
if (length > keyLength)
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