char *
Digest_File(CCDigestAlg algorithm, const char *filename, char *buf)
{
int fd;
__block CCDigestCtx ctx;
dispatch_queue_t queue;
dispatch_semaphore_t sema;
dispatch_io_t io;
__block int s_error = 0;
/* dispatch_io_create_with_path requires an absolute path */
fd = open(filename, O_RDONLY);
if (fd < 0) {
return NULL;
}
(void)fcntl(fd, F_NOCACHE, 1);
(void)osx_assumes_zero(CCDigestInit(algorithm, &ctx));
queue = dispatch_queue_create("com.apple.mtree.io", NULL);
osx_assert(queue);
sema = dispatch_semaphore_create(0);
osx_assert(sema);
io = dispatch_io_create(DISPATCH_IO_STREAM, fd, queue, ^(int error) {
if (error != 0) {
s_error = error;
}
(void)close(fd);
(void)dispatch_semaphore_signal(sema);
});
char *
Digest_Data(CCDigestAlg algorithm, const void *data, size_t len, char *buf)
{
CCDigestCtx ctx;
(void)osx_assumes_zero(CCDigestInit(algorithm, &ctx));
(void)osx_assumes_zero(CCDigestUpdate(&ctx, data, len));
return Digest_End(&ctx, buf);
}
int
CCDigest(CCDigestAlg algorithm, const uint8_t *data, size_t length, uint8_t *output)
{
CCDigestCtx_t c;
CCDigestCtxPtr ptr = &c;
CCDigestInit(algorithm, ptr);
uint8_t* checkedData = data;
if (checkedData == NULL) {
checkedData = "";
}
hash_descriptor[ptr->hashIndex].process(&ptr->md, checkedData, length);
return hash_descriptor[ptr->hashIndex].done(&ptr->md, output);
}
CCDigestRef
CCDigestCreate(CCDigestAlg algorithm)
{
CCDigestRef ctx;
if(!(ctx = (CCDigestCtx *) malloc(CC_DIGEST_SIZE))) {
return NULL;
}
if(CCDigestInit(algorithm, ctx) != 0) {
free(ctx);
return NULL;
}
return ctx;
}
