// ------------------------------------------------------------------ DXChannel ----//
DXChannel::DXChannel(DXSound &ds, BufferDesc desc) : dxs(ds), bdesc(desc) {
init_desc(desc);
HRESULT ret = ds.sound->CreateSoundBuffer(&bufdesc, &buffer, NULL);
if (FAILED(ret)) {
printf("Not create dxbuffer 0x%x", ret);
throw ret;
}
}
SIFTs* get_sifts(const char* file){
SIFTs* desc;
float temp;
short x;
unsigned int nlines;
// apertura file stream
ifstream inFile;
inFile.open( file );
if(!inFile) {
cerr << "Unable to open file " << file << endl;
exit(1);
}
// conteggio righe
nlines = 0;
while(!inFile.eof()){
if(inFile.get() == '\n') nlines++;
}
// alloca spazio del vettore di sift
desc = init_desc(nlines);
// stream reset
inFile.clear();
inFile.seekg(0);
// lettura file
// salta i primi quattro dati
inFile >> temp;
inFile >> temp;
inFile >> temp;
inFile >> temp;
for(int sift_count = 0; !inFile.eof(); sift_count++){
// lettura delle 128 distanze
for(int j = 0; j < SIFT_SIZE; j++){
inFile >> x;
desc->sift_array[sift_count*SIFT_SIZE+j] = x;
}
// salta i primi quattro dati di ogni nuova riga
inFile >> temp;
inFile >> temp;
inFile >> temp;
inFile >> temp;
}
// chiusura file stream
inFile.close();
return desc;
}
/*
* Calculate the HMAC value across the set of protected security xattrs.
*
* Instead of retrieving the requested xattr, for performance, calculate
* the hmac using the requested xattr value. Don't alloc/free memory for
* each xattr, but attempt to re-use the previously allocated memory.
*/
static int evm_calc_hmac_or_hash(struct dentry *dentry,
const char *req_xattr_name,
const char *req_xattr_value,
size_t req_xattr_value_len,
char type, char *digest)
{
struct inode *inode = dentry->d_inode;
struct shash_desc *desc;
char **xattrname;
size_t xattr_size = 0;
char *xattr_value = NULL;
int error;
int size;
if (!inode->i_op || !inode->i_op->getxattr)
return -EOPNOTSUPP;
desc = init_desc(type);
if (IS_ERR(desc))
return PTR_ERR(desc);
error = -ENODATA;
for (xattrname = evm_config_xattrnames; *xattrname != NULL; xattrname++) {
if ((req_xattr_name && req_xattr_value)
&& !strcmp(*xattrname, req_xattr_name)) {
error = 0;
crypto_shash_update(desc, (const u8 *)req_xattr_value,
req_xattr_value_len);
continue;
}
size = vfs_getxattr_alloc(dentry, *xattrname,
&xattr_value, xattr_size, GFP_NOFS);
if (size == -ENOMEM) {
error = -ENOMEM;
goto out;
}
if (size < 0)
continue;
error = 0;
xattr_size = size;
crypto_shash_update(desc, (const u8 *)xattr_value, xattr_size);
}
hmac_add_misc(desc, inode, digest);
out:
kfree(xattr_value);
kfree(desc);
return error;
}
int evm_init_hmac(struct inode *inode, const struct xattr *lsm_xattr,
char *hmac_val)
{
struct shash_desc *desc;
desc = init_desc();
if (IS_ERR(desc)) {
printk(KERN_INFO "init_desc failed\n");
return PTR_ERR(desc);
}
crypto_shash_update(desc, lsm_xattr->value, lsm_xattr->value_len);
hmac_add_misc(desc, inode, hmac_val);
kfree(desc);
return 0;
}
/*
* Calculate the MD5/SHA1 file digest
*/
int ima_calc_hash(struct file *file, char *digest)
{
struct hash_desc desc;
struct scatterlist sg[1];
loff_t i_size, offset = 0;
char *rbuf;
int rc;
rc = init_desc(&desc);
if (rc != 0)
return rc;
rbuf = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!rbuf) {
rc = -ENOMEM;
goto out;
}
i_size = i_size_read(file->f_dentry->d_inode);
while (offset < i_size) {
int rbuf_len;
rbuf_len = kernel_read(file, offset, rbuf, PAGE_SIZE);
if (rbuf_len < 0) {
rc = rbuf_len;
break;
}
if (rbuf_len == 0)
break;
offset += rbuf_len;
sg_init_one(sg, rbuf, rbuf_len);
rc = crypto_hash_update(&desc, sg, rbuf_len);
if (rc)
break;
}
kfree(rbuf);
if (!rc)
rc = crypto_hash_final(&desc, digest);
out:
crypto_free_hash(desc.tfm);
return rc;
}
rc = crypto_hash_final(&desc, digest);
out:
crypto_free_hash(desc.tfm);
return rc;
}
/*
* Calculate the hash of a given template
*/
int ima_calc_template_hash(int template_len, void *template, char *digest)
{
struct hash_desc desc;
struct scatterlist sg[1];
int rc;
rc = init_desc(&desc);
if (rc != 0)
return rc;
sg_init_one(sg, template, template_len);
rc = crypto_hash_update(&desc, sg, template_len);
if (!rc)
rc = crypto_hash_final(&desc, digest);
crypto_free_hash(desc.tfm);
return rc;
}
static void __init ima_pcrread(int idx, u8 *pcr)
{
if (!ima_used_chip)
return;