uint64_t shrand(void)
{
char buf[MAX_RANDOM_SEED_SIZE];
int i;
memset(buf, 0, sizeof(buf));
FILE *ran = fopen("/dev/urandom", "r");
if (ran) {
fread(buf, 1, sizeof(buf), ran);
fclose(ran);
} else {
static int init;
if (!init) {
init = 1;
srand((unsigned int)shtime());
}
unsigned int rval;
for (i = 0; i < MAX_RANDOM_SEED_SIZE; i += 4) {
rval = rand();
memcpy(buf + i, &rval, sizeof(rval));
}
}
return (shcrc(buf, sizeof(buf)));
}
int _shfs_ref_raw_write(shfs_ino_t *file, shbuf_t *buff)
{
shfs_ino_t *inode;
int err;
if (!file)
return (SHERR_INVAL);
inode = shfs_inode(file, NULL, SHINODE_REFERENCE);
if (!inode)
return (SHERR_IO);
if (shbuf_size(buff) > SHFS_BLOCK_DATA_SIZE) {
return (SHERR_TOOMANYREFS);
}
memset((char *)inode->blk.raw, 0, SHFS_BLOCK_DATA_SIZE);
memcpy((char *)inode->blk.raw, shbuf_data(buff), shbuf_size(buff));
inode->blk.hdr.size = shbuf_size(buff);
inode->blk.hdr.crc = shcrc(shbuf_data(buff), shbuf_size(buff));
err = shfs_inode_write_entity(inode);
if (err)
return (err);
/* copy aux stats to file inode. */
file->blk.hdr.mtime = inode->blk.hdr.mtime;
file->blk.hdr.size = inode->blk.hdr.size;
file->blk.hdr.crc = inode->blk.hdr.crc;
file->blk.hdr.format = SHINODE_REFERENCE;
file->blk.hdr.attr |= SHATTR_LINK;
return (0);
}
/**
* Store supplementary credential data in a file.
*/
int shfs_cred_store(shfs_ino_t *file, shkey_t *key, unsigned char *data, size_t data_len)
{
shfs_ino_t *cred;
shbuf_t *buff;
char key_buf[MAX_SHARE_HASH_LENGTH];
int err;
memset(key_buf, 0, sizeof(key_buf));
sprintf(key_buf, "%s", shkey_hex(key));
cred = shfs_inode(file, key_buf, SHINODE_ACCESS);
if (!cred)
return (SHERR_IO);
cred->blk.hdr.format = SHINODE_ACCESS;
buff = shbuf_map(data, data_len);
err = shfs_aux_write(cred, buff);
free(buff);
if (err)
return (err);
file->blk.hdr.attr |= SHATTR_CRED;
file->blk.hdr.crc = shcrc(data, data_len);
file->blk.hdr.size = data_len;
err = shfs_inode_write_entity(file);
if (err)
return (err);
return (0);
}
static void generate_bond_signature(tx_bond_t *bond)
{
shkey_t *sig_key;
uint64_t crc;
crc = (uint64_t)shcrc(bond->bond_sink, strlen(bond->bond_sink));
sig_key = shkey_cert(&bond->bond_key, crc, bond->bond_expire);
memcpy(&bond->bond_sig, sig_key, sizeof(shkey_t));
shkey_free(&sig_key);
}
static int validate_bond_signature(tx_bond_t *bond)
{
uint64_t crc;
int err;
crc = (uint64_t)shcrc(bond->bond_sink, strlen(bond->bond_sink));
err = shkey_verify(&bond->bond_sig, crc, &bond->bond_key, bond->bond_expire);
if (err)
return (err);
return (0);
}
int verify_asset_signature(tx_asset_t *asset, shpeer_t *peer)
{
uint64_t crc;
int err;
crc = shcrc((unsigned char *)asset->ass_data, asset->ass_size);
err = shkey_verify(shpeer_kpriv(peer), crc,
&asset->ass.ass_sig, asset->ass.ass_expire);
if (err)
return (err);
return (0);
}
void generate_asset_signature(tx_asset_t *asset, shpeer_t *peer)
{
shkey_t *sig_key;
uint64_t crc;
if (asset->ass.ass_expire == SHTIME_UNDEFINED)
asset->ass.ass_expire = shtime_adj(shtime(), SHARE_DEFAULT_EXPIRE_TIME);
crc = shcrc((unsigned char *)asset->ass_data, asset->ass_size);
sig_key = shkey_cert(shpeer_kpriv(peer), crc, asset->ass.ass_expire);
memcpy(&asset->ass.ass_sig, sig_key, sizeof(shkey_t));
shkey_free(&sig_key);
}
void shmap_print(shmap_t *h, shbuf_t *ret_buff)
{
shmap_entry_t *ent;
shmap_value_t mval;
shmap_index_t *hi;
shkey_t *key;
char buf[256];
char *val;
char str[4096];
ssize_t len;
int flag;
int idx;
int i;
if (!h || !ret_buff)
return; /* all done */
i = 0;
for (hi = shmap_first(h); hi; hi = shmap_next(hi)) {
shmap_self(hi, &key, &val, &len, &flag);
if (!len || !val)
continue;
flag &= ~SHMAP_ALLOC;
memset(&mval, 0, sizeof(mval));
memcpy(&mval.name, key, sizeof(mval.name));
mval.magic = SHMEM32_MAGIC;
mval.stamp = shtime();
mval.crc = shcrc(val, len);
mval.pf = flag;
mval.sz = len;
shbuf_cat(ret_buff, &mval, sizeof(shmap_value_t));
shbuf_cat(ret_buff, val, len);
#if 0
hdr = (shmap_value_t *)val;
memcpy(&hdr->name, key, sizeof(shkey_t));
shbuf_cat(ret_buff, hdr, sizeof(shmap_value_t));
shbuf_cat(ret_buff, ((char *)val + sizeof(shmap_value_t)), hdr->sz);
#endif
i++;
}
}
static int validate_asset_signature(tx_asset_t *asset)
{
shpeer_t *peer;
uint64_t crc;
int err;
peer = load_asset_peer(&asset->ass.ass_id);
if (!peer)
return (SHERR_INVAL);
crc = shcrc((unsigned char *)asset->ass_data, asset->ass_size);
err = shkey_verify(shpeer_kpriv(peer), crc,
&asset->ass.ass_sig, asset->ass.ass_expire);
if (err)
return (err);
return (0);
}
/* faster version */
static void shkey_bin_r(void *data, size_t data_len, shkey_t *key)
{
uint64_t val;
size_t step;
size_t len;
size_t of;
int i;
memset(key, 0, sizeof(shkey_t));
val = 0;
step = data_len / SHKEY_WORDS;
for (i = 0; i < SHKEY_WORDS; i++) {
/* add block to sha hash */
of = step * i;
len = MIN(data_len - of, step + 8);
val += shcrc((char *)data + of, len);
key->code[i] = (uint32_t)val;
}
}
int shfs_ext_set(shfs_ino_t *file, const char *path)
{
struct stat st;
shfs_ino_t *ext;
char fs_path[SHFS_PATH_MAX];
int err;
if (file == NULL || !path || !*path)
return (SHERR_INVAL);
err = stat(path, &st);
if (err) {
return (errno2sherr());
}
ext = shfs_inode(file, NULL, SHINODE_EXTERNAL);
if (!ext)
return (SHERR_IO);
memset(fs_path, 0, sizeof(fs_path));
strncpy(fs_path, path, sizeof(fs_path) - 1);
/* save local hard-drive path as inode data. */
memset(ext->blk.raw, 0, SHFS_PATH_MAX);
strcpy((char *)ext->blk.raw, fs_path);
ext->blk.hdr.size = SHFS_PATH_MAX;
ext->blk.hdr.crc = shcrc(fs_path, SHFS_PATH_MAX);
err = shfs_inode_write_entity(ext);
if (err)
return (err);
/* copy ext stats to file inode. */
file->blk.hdr.mtime = ext->blk.hdr.mtime;
file->blk.hdr.size = ext->blk.hdr.size;
file->blk.hdr.crc = ext->blk.hdr.crc;
file->blk.hdr.format = SHINODE_EXTERNAL;
file->blk.hdr.attr |= SHATTR_LINK_EXT;
return (0);
}
static int shproc_write(shproc_t *proc, shproc_req_t *req)
{
int w_len;
int err;
int of;
req->data_len = shbuf_size(proc->proc_buff);
req->crc = shcrc(shbuf_data(proc->proc_buff), shbuf_size(proc->proc_buff));
err = write(proc->proc_fd, req, sizeof(shproc_req_t));
if (err == -1)
return (errno2sherr());
if (err == 0)
return (SHERR_AGAIN);
of = 0;
while (of < shbuf_size(proc->proc_buff)) {
/*
* On i386 the buffer is 4096 and 65k otherwise.
* Parent is granted 100ms to 'poll' when size exceeds buffer limit.
*/
err = shproc_write_wait(proc, 100);
if (err)
return (err);
w_len = write(proc->proc_fd,
shbuf_data(proc->proc_buff) + of,
shbuf_size(proc->proc_buff) - of);
if (w_len == -1)
return (errno2sherr());
if (w_len == 0)
return (SHERR_AGAIN);
of += w_len;
}
return (0);
}
uint64_t shkey_crc(shkey_t *key)
{
if (!key)
return (0);
return (shcrc(key, sizeof(shkey_t)));
}