int hash_lbr(uint8_t hash[DIGEST_LENGTH],struct lbr_t *lbr) {
struct scatterlist sg;
int i, j;
/* No error checking here. If anything fails, we better go straight home anyway. */
crypto_hash_init(&armor_desc);
armor_desc.flags = 0;
/* Loop over all LBR entries. */
for (i = 0; i < LBR_ENTRIES; i++) {
sg_set_buf(&sg, &lbr->from[(lbr->tos - i) % LBR_ENTRIES], sizeof(uint64_t));
crypto_hash_update(&armor_desc, &sg, sizeof(uint64_t));
sg_set_buf(&sg, &lbr->to [(lbr->tos - i) % LBR_ENTRIES], sizeof(uint64_t));
crypto_hash_update(&armor_desc, &sg, sizeof(uint64_t));
printdj(false, "lbr[%2d], <from: 0x%012llx, to: 0x%012llx>\n", i,
lbr->from[(lbr->tos+LBR_ENTRIES-i) % LBR_ENTRIES],
lbr-> to[(lbr->tos+LBR_ENTRIES-i) % LBR_ENTRIES]);
}
ARMOR_STAT_INC(digests);
crypto_hash_final(&armor_desc, hash);
printdj(false, "hash: ");
for (j = 0; j < DIGEST_LENGTH; j++) printdj(false,"%02x", hash[j]);
printdj(false,"\n");
return 0;
}
TEE_Result tee_cryp_concat_kdf(uint32_t hash_id, const uint8_t *shared_secret,
size_t shared_secret_len,
const uint8_t *other_info,
size_t other_info_len, uint8_t *derived_key,
size_t derived_key_len)
{
TEE_Result res;
size_t hash_len, i, n, sz;
void *ctx = NULL;
uint8_t tmp[TEE_MAX_HASH_SIZE];
uint32_t be_count;
uint8_t *out = derived_key;
uint32_t hash_algo = TEE_ALG_HASH_ALGO(hash_id);
res = crypto_hash_alloc_ctx(&ctx, hash_algo);
if (res != TEE_SUCCESS)
return res;
res = tee_hash_get_digest_size(hash_algo, &hash_len);
if (res != TEE_SUCCESS)
goto out;
n = derived_key_len / hash_len;
sz = hash_len;
for (i = 1; i <= n + 1; i++) {
be_count = TEE_U32_TO_BIG_ENDIAN(i);
res = crypto_hash_init(ctx, hash_algo);
if (res != TEE_SUCCESS)
goto out;
res = crypto_hash_update(ctx, hash_algo, (uint8_t *)&be_count,
sizeof(be_count));
if (res != TEE_SUCCESS)
goto out;
res = crypto_hash_update(ctx, hash_algo, shared_secret,
shared_secret_len);
if (res != TEE_SUCCESS)
goto out;
if (other_info && other_info_len) {
res = crypto_hash_update(ctx, hash_algo, other_info,
other_info_len);
if (res != TEE_SUCCESS)
goto out;
}
res = crypto_hash_final(ctx, hash_algo, tmp, sizeof(tmp));
if (res != TEE_SUCCESS)
goto out;
if (i == n + 1)
sz = derived_key_len % hash_len;
memcpy(out, tmp, sz);
out += sz;
}
res = TEE_SUCCESS;
out:
crypto_hash_free_ctx(ctx, hash_algo);
return res;
}
int
chkpw(struct gr_arg *entry, unsigned char *salt, unsigned char *sum)
{
char *p;
struct crypto_hash *tfm;
struct hash_desc desc;
struct scatterlist sg;
unsigned char temp_sum[GR_SHA_LEN];
volatile int retval = 0;
volatile int dummy = 0;
unsigned int i;
sg_init_table(&sg, 1);
tfm = crypto_alloc_hash("sha256", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
/* should never happen, since sha256 should be built in */
return 1;
}
desc.tfm = tfm;
desc.flags = 0;
crypto_hash_init(&desc);
p = salt;
sg_set_buf(&sg, p, GR_SALT_LEN);
crypto_hash_update(&desc, &sg, sg.length);
p = entry->pw;
sg_set_buf(&sg, p, strlen(p));
crypto_hash_update(&desc, &sg, sg.length);
crypto_hash_final(&desc, temp_sum);
memset(entry->pw, 0, GR_PW_LEN);
for (i = 0; i < GR_SHA_LEN; i++)
if (sum[i] != temp_sum[i])
retval = 1;
else
dummy = 1; // waste a cycle
crypto_free_hash(tfm);
return retval;
}
unsigned char * key_to_hash(unsigned char *key)
{
struct scatterlist sg;
struct crypto_hash *tfm;
struct hash_desc desc;
unsigned char *digest= NULL;
digest=kmalloc(16,GFP_KERNEL);
if(IS_ERR(digest)){
printk("Error in allocating memory to Hash Key\n ");
return NULL;
}
tfm = crypto_alloc_hash("md5", 0, 0);
desc.tfm = tfm;
desc.flags = 0;
sg_init_one(&sg, key, 16);
crypto_hash_init(&desc);
crypto_hash_update(&desc, &sg, 16);
crypto_hash_final(&desc, digest);
crypto_free_hash(tfm);
if(!digest){
printk("Error in hashing userland key\n");
return NULL;
}
return digest;
}
static int __init sha1_init(void)
{
struct scatterlist sg;
struct crypto_hash *tfm;
struct hash_desc desc;
unsigned char output[SHA1_LENGTH];
unsigned char buf[10];
int i;
printk(KERN_INFO "sha1: %s\n", __FUNCTION__);
memset(buf, 'A', 10);
memset(output, 0x00, SHA1_LENGTH);
tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
desc.tfm = tfm;
desc.flags = 0;
sg_init_one(&sg, buf, 10);
crypto_hash_init(&desc);
crypto_hash_update(&desc, &sg, 10);
crypto_hash_final(&desc, output);
for (i = 0; i < 20; i++) {
printk(KERN_ERR "%d-%d\n", output[i], i);
}
crypto_free_hash(tfm);
return 0;
}
/* checksum the plaintext data and hdrlen bytes of the token header */
s32
make_checksum(char *cksumname, char *header, int hdrlen, struct xdr_buf *body,
int body_offset, struct xdr_netobj *cksum)
{
struct hash_desc desc; /* XXX add to ctx? */
struct scatterlist sg[1];
int err;
desc.tfm = crypto_alloc_hash(cksumname, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(desc.tfm))
return GSS_S_FAILURE;
cksum->len = crypto_hash_digestsize(desc.tfm);
desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
err = crypto_hash_init(&desc);
if (err)
goto out;
sg_set_buf(sg, header, hdrlen);
err = crypto_hash_update(&desc, sg, hdrlen);
if (err)
goto out;
err = xdr_process_buf(body, body_offset, body->len - body_offset,
checksummer, &desc);
if (err)
goto out;
err = crypto_hash_final(&desc, cksum->data);
out:
crypto_free_hash(desc.tfm);
return err ? GSS_S_FAILURE : 0;
}
static TEE_Result ree_fs_ta_read(struct user_ta_store_handle *h, void *data,
size_t len)
{
struct ree_fs_ta_handle *handle = (struct ree_fs_ta_handle *)h;
uint8_t *src = (uint8_t *)handle->nw_ta + handle->offs;
uint8_t *dst = src;
TEE_Result res;
if (handle->offs + len > handle->nw_ta_size)
return TEE_ERROR_BAD_PARAMETERS;
if (data) {
dst = data; /* Hash secure buffer (shm might be modified) */
memcpy(dst, src, len);
}
res = crypto_hash_update(handle->hash_ctx, handle->hash_algo, dst, len);
if (res != TEE_SUCCESS)
return TEE_ERROR_SECURITY;
handle->offs += len;
if (handle->offs == handle->nw_ta_size) {
/*
* Last read: time to check if our digest matches the expected
* one (from the signed header)
*/
res = check_digest(handle);
}
return res;
}
// given a string, generate a 32-bit key
int generate_key(char *pwd, u8 *pkey)
{
int len_pwd = strlen(pwd);
struct scatterlist sg;
struct crypto_hash *tfm;
struct hash_desc desc;
int i;
unsigned char output[SHA1_LENGTH]; // key generated
char *buf = kmalloc(MAX_PWD, GFP_KERNEL); // password buffer
memset(buf, 0, MAX_PWD);
strncpy(buf, pwd, len_pwd);
tfm = crypto_alloc_hash("sha1", 1, CRYPTO_ALG_ASYNC);
desc.tfm = tfm;
desc.flags = 0;
sg_init_one(&sg, buf, len_pwd);
crypto_hash_init(&desc);
crypto_hash_update(&desc, &sg, len_pwd);
crypto_hash_final(&desc, output);
for(i=0; i<16; i++)
pkey[i] = output[i];
for(i=0; i<16; i++)
pkey[i+16] = output[i];
crypto_free_hash(tfm);
kfree(buf);
return 0;
}
TEE_Result tee_hash_createdigest(uint32_t algo, const uint8_t *data,
size_t datalen, uint8_t *digest,
size_t digestlen)
{
TEE_Result res;
void *ctx = NULL;
res = crypto_hash_alloc_ctx(&ctx, algo);
if (res)
return res;
res = crypto_hash_init(ctx, algo);
if (res)
goto out;
if (datalen != 0) {
res = crypto_hash_update(ctx, algo, data, datalen);
if (res)
goto out;
}
res = crypto_hash_final(ctx, algo, digest, digestlen);
out:
crypto_hash_free_ctx(ctx, algo);
return res;
}
static int
checksummer(struct scatterlist *sg, void *data)
{
struct hash_desc *desc = data;
return crypto_hash_update(desc, sg, sg->length);
}
/**
* Update hash digest computed on the specified data
*
* \param[in] hdesc hash state descriptor
* \param[in] buf data buffer on which to compute the hash
* \param[in] buf_len length of \buf on which to compute hash
*
* \retval 0 for success
* \retval negative errno on failure
*/
int cfs_crypto_hash_update(struct cfs_crypto_hash_desc *hdesc,
const void *buf, unsigned int buf_len)
{
struct scatterlist sl;
sg_init_one(&sl, (void *)buf, buf_len);
return crypto_hash_update((struct hash_desc *)hdesc, &sl, sl.length);
}
/* a counter-based KDF based on NIST SP800-108 */
static int eap_pwd_kdf(const u8 *key, size_t keylen, const u8 *label, size_t labellen, u8 *result, size_t resultbitlen)
{
struct crypto_hash *hash;
u8 digest[SHA256_MAC_LEN];
u16 i, ctr, L;
size_t resultbytelen, len = 0, mdlen;
resultbytelen = (resultbitlen + 7) / 8;
ctr = 0;
L = htons(resultbitlen);
while (len < resultbytelen) {
ctr++;
i = htons(ctr);
hash = crypto_hash_init(CRYPTO_HASH_ALG_HMAC_SHA256, key, keylen);
if (hash == NULL) {
return -1;
}
if (ctr > 1) {
crypto_hash_update(hash, digest, SHA256_MAC_LEN);
}
crypto_hash_update(hash, (u8 *)&i, sizeof(u16));
crypto_hash_update(hash, label, labellen);
crypto_hash_update(hash, (u8 *)&L, sizeof(u16));
mdlen = SHA256_MAC_LEN;
if (crypto_hash_finish(hash, digest, &mdlen) < 0) {
return -1;
}
if ((len + mdlen) > resultbytelen) {
os_memcpy(result + len, digest, resultbytelen - len);
} else {
os_memcpy(result + len, digest, mdlen);
}
len += mdlen;
}
/* since we're expanding to a bit length, mask off the excess */
if (resultbitlen % 8) {
u8 mask = 0xff;
mask <<= (8 - (resultbitlen % 8));
result[resultbytelen - 1] &= mask;
}
return 0;
}
/**
* Update hash digest computed on data within the given \a page
*
* \param[in] hdesc hash state descriptor
* \param[in] page data page on which to compute the hash
* \param[in] offset offset within \a page at which to start hash
* \param[in] len length of data on which to compute hash
*
* \retval 0 for success
* \retval negative errno on failure
*/
int cfs_crypto_hash_update_page(struct cfs_crypto_hash_desc *hdesc,
struct page *page, unsigned int offset,
unsigned int len)
{
struct scatterlist sl;
sg_init_table(&sl, 1);
sg_set_page(&sl, page, len, offset & ~CFS_PAGE_MASK);
return crypto_hash_update((struct hash_desc *)hdesc, &sl, sl.length);
}
void sha1_update(void *c, const void *crap, int len)
{
struct hash_desc *d = c;
struct scatterlist sg;
sg_init_table(&sg, 1);
sg_set_buf(&sg, crap, len);
if (crypto_hash_update(d, &sg, len))
printk(KERN_INFO "crypto_hash_update()\n");
}
int tls_key_x_server_params_hash(u16 tls_version, const u8 *client_random,
const u8 *server_random,
const u8 *server_params,
size_t server_params_len, u8 *hash)
{
u8 *hpos;
size_t hlen;
struct crypto_hash *ctx;
hpos = hash;
ctx = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL, 0);
if (ctx == NULL)
return -1;
crypto_hash_update(ctx, client_random, TLS_RANDOM_LEN);
crypto_hash_update(ctx, server_random, TLS_RANDOM_LEN);
crypto_hash_update(ctx, server_params, server_params_len);
hlen = MD5_MAC_LEN;
if (crypto_hash_finish(ctx, hash, &hlen) < 0)
return -1;
hpos += hlen;
ctx = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL, 0);
if (ctx == NULL)
return -1;
crypto_hash_update(ctx, client_random, TLS_RANDOM_LEN);
crypto_hash_update(ctx, server_random, TLS_RANDOM_LEN);
crypto_hash_update(ctx, server_params, server_params_len);
hlen = hash + sizeof(hash) - hpos;
if (crypto_hash_finish(ctx, hpos, &hlen) < 0)
return -1;
hpos += hlen;
return hpos - hash;
}
int tlsv12_key_x_server_params_hash(u16 tls_version, u8 hash_alg,
const u8 *client_random,
const u8 *server_random,
const u8 *server_params,
size_t server_params_len, u8 *hash)
{
size_t hlen;
struct crypto_hash *ctx;
enum crypto_hash_alg alg;
switch (hash_alg) {
case TLS_HASH_ALG_SHA256:
alg = CRYPTO_HASH_ALG_SHA256;
hlen = SHA256_MAC_LEN;
break;
case TLS_HASH_ALG_SHA384:
alg = CRYPTO_HASH_ALG_SHA384;
hlen = 48;
break;
case TLS_HASH_ALG_SHA512:
alg = CRYPTO_HASH_ALG_SHA512;
hlen = 64;
break;
default:
return -1;
}
ctx = crypto_hash_init(alg, NULL, 0);
if (ctx == NULL)
return -1;
crypto_hash_update(ctx, client_random, TLS_RANDOM_LEN);
crypto_hash_update(ctx, server_random, TLS_RANDOM_LEN);
crypto_hash_update(ctx, server_params, server_params_len);
if (crypto_hash_finish(ctx, hash, &hlen) < 0)
return -1;
return hlen;
}
int wrapfs_compute_checksum(struct file* filp, char* buffer, char *checksum_algorithm) {
struct scatterlist sg[1];
struct hash_desc desc;
mm_segment_t oldfs;
int bytes, rc =0;
// int diglength = 16;
int length = PAGE_SIZE;
unsigned char buf[DIGESTLEN+1];
char *read_in_buffer = NULL;
memset(buf,0,DIGESTLEN+1);
read_in_buffer = kmalloc(length, GFP_KERNEL);
if(read_in_buffer == NULL) {
kfree(read_in_buffer);
printk("Error in allocating memonry in checksum block.\n");
return -ENOMEM;
}
filp->f_pos = 0;
oldfs = get_fs();
set_fs(KERNEL_DS);
rc = crypt_init_desc(&desc,checksum_algorithm);
do {
bytes = filp->f_op->read(filp, read_in_buffer, length, &filp->f_pos);
sg_init_one(sg,read_in_buffer,bytes);
rc = crypto_hash_update(&desc,sg,bytes);
} while(bytes);
if(!rc) {
rc = crypto_hash_final(&desc, buf);//calculate final digest and populate value in buf
#if 0
printk("\n printing checksum in compute checksum \n");
for(i =0;i<16;i++){
printk("%02x",buf[i]& 0XFF);
// buffer[i] = buf[i];
}
#endif
}
rc = str_to_hex_str(buf, buffer, DIGESTLEN*2 +1, DIGESTLEN);
crypto_free_hash(desc.tfm);
set_fs(oldfs);
kfree(read_in_buffer);
return rc;
}
/*
* Calculates block's hash value, to avoid all block compare.
* hash_out must be allocated outside.
*/
int calc_hash(char* data, size_t size, u8* hash_out)
{
struct hash_desc sha256_desc;
struct scatterlist sg;
sha256_desc.tfm = crypto_alloc_hash("sha256", 0, CRYPTO_ALG_ASYNC);
sg_init_one(&sg, data, size);
crypto_hash_init(&sha256_desc);
crypto_hash_update(&sha256_desc, &sg, size);
crypto_hash_final(&sha256_desc, hash_out);
crypto_free_hash(sha256_desc.tfm);
return 0;
}
static void padlock_sha_bypass(struct crypto_tfm *tfm)
{
if (ctx(tfm)->bypass)
return;
crypto_hash_init(&ctx(tfm)->fallback);
if (ctx(tfm)->data && ctx(tfm)->used) {
struct scatterlist sg;
sg_init_one(&sg, ctx(tfm)->data, ctx(tfm)->used);
crypto_hash_update(&ctx(tfm)->fallback, &sg, sg.length);
}
ctx(tfm)->used = 0;
ctx(tfm)->bypass = 1;
}
static int tcp_v6_md5_hash_pseudoheader(struct tcp_md5sig_pool *hp,
const struct in6_addr *daddr,
const struct in6_addr *saddr, int nbytes)
{
struct tcp6_pseudohdr *bp;
struct scatterlist sg;
bp = &hp->md5_blk.ip6;
bp->saddr = *saddr;
bp->daddr = *daddr;
bp->protocol = cpu_to_be32(IPPROTO_TCP);
bp->len = cpu_to_be32(nbytes);
sg_init_one(&sg, bp, sizeof(*bp));
return crypto_hash_update(&hp->md5_desc, &sg, sizeof(*bp));
}
static void digest_header(struct hash_desc *hash, struct iscsi_pdu *pdu,
u8 *crc)
{
struct scatterlist sg[2];
unsigned int nbytes = sizeof(struct iscsi_hdr);
sg_init_table(sg, pdu->ahssize ? 2 : 1);
sg_set_buf(&sg[0], &pdu->bhs, nbytes);
if (pdu->ahssize) {
sg_set_buf(&sg[1], pdu->ahs, pdu->ahssize);
nbytes += pdu->ahssize;
}
crypto_hash_init(hash);
crypto_hash_update(hash, sg, nbytes);
crypto_hash_final(hash, crc);
}
static void padlock_sha_update(struct crypto_tfm *tfm,
const uint8_t *data, unsigned int length)
{
/* Our buffer is always one page. */
if (unlikely(!ctx(tfm)->bypass &&
(ctx(tfm)->used + length > PAGE_SIZE)))
padlock_sha_bypass(tfm);
if (unlikely(ctx(tfm)->bypass)) {
struct scatterlist sg;
sg_init_one(&sg, (uint8_t *)data, length);
crypto_hash_update(&ctx(tfm)->fallback, &sg, length);
return;
}
memcpy(ctx(tfm)->data + ctx(tfm)->used, data, length);
ctx(tfm)->used += length;
}
void tls_verify_hash_add(struct tls_verify_hash *verify, const u8 *buf,
size_t len)
{
if (verify->md5_client && verify->sha1_client) {
crypto_hash_update(verify->md5_client, buf, len);
crypto_hash_update(verify->sha1_client, buf, len);
}
if (verify->md5_server && verify->sha1_server) {
crypto_hash_update(verify->md5_server, buf, len);
crypto_hash_update(verify->sha1_server, buf, len);
}
if (verify->md5_cert && verify->sha1_cert) {
crypto_hash_update(verify->md5_cert, buf, len);
crypto_hash_update(verify->sha1_cert, buf, len);
}
#ifdef CONFIG_TLSV12
if (verify->sha256_client)
crypto_hash_update(verify->sha256_client, buf, len);
if (verify->sha256_server)
crypto_hash_update(verify->sha256_server, buf, len);
if (verify->sha256_cert)
crypto_hash_update(verify->sha256_cert, buf, len);
#endif /* CONFIG_TLSV12 */
}
/* get_key_hash
*
* @enc_key: key of which the md5 hash has to be generated
*
* Returns the md5 hash of the key. Responsibility of freeing the hashed key lies with the caller who requested the hashed key.
*/
unsigned char *get_key_hash(unsigned char *enc_key)
{
/* imp, plaintext should be array else getting sefault so copy key in array here */
struct scatterlist sg;
struct hash_desc desc;
int i, err;
unsigned char *hashed_key;
unsigned char plaintext[AES_KEY_SIZE];
for (i = 0; i < AES_KEY_SIZE; i++)
plaintext[i] = enc_key[i];
hashed_key = kmalloc(sizeof(char)*AES_KEY_SIZE, GFP_KERNEL);
desc.tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(desc.tfm)) {
err = PTR_ERR(desc.tfm);
printk(KERN_ALERT"error in allocating hash");
goto ERR;
}
desc.flags = 0;
sg_init_one(&sg, plaintext, AES_KEY_SIZE);
err = crypto_hash_init(&desc);
if (err) {
printk(KERN_ALERT"error in initializing crypto hash\n");
goto ERR;
}
err = crypto_hash_update(&desc, &sg, AES_KEY_SIZE);
if (err) {
printk(KERN_ALERT"error in updating crypto hash\n");
goto ERR;
}
printk(KERN_ALERT"cry[to hash updated\n");
err = crypto_hash_final(&desc, hashed_key);
if (err) {
printk(KERN_ALERT"error in finalizing crypto hash\n");
goto ERR;
}
crypto_free_hash(desc.tfm);
return hashed_key;
ERR:
if (desc.tfm)
crypto_free_hash(desc.tfm);
return ERR_PTR(err);
}
/*
* 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;
}
int calculate_key(char *key,char *chksum,int len)
{
int rc =0;
struct scatterlist sg;
struct hash_desc desc;
desc.flags = 0;
desc.tfm = crypto_alloc_hash("md5",0,CRYPTO_ALG_ASYNC);
if(IS_ERR(desc.tfm))
{
rc = PTR_ERR(desc.tfm);
goto out;
}
if(crypto_hash_init(&desc))
goto out;
sg_init_one(&sg,(u8*)key,len);
crypto_hash_update(&desc,&sg,len);
crypto_hash_final(&desc,chksum);
out:
return rc;
}
static void digest_data(struct hash_desc *hash, struct iscsi_cmnd *cmnd,
struct tio *tio, u32 offset, u8 *crc)
{
struct scatterlist *sg = cmnd->conn->hash_sg;
u32 size, length;
int i, idx, count;
unsigned int nbytes;
size = cmnd->pdu.datasize;
nbytes = size = (size + 3) & ~3;
offset += tio->offset;
idx = offset >> PAGE_CACHE_SHIFT;
offset &= ~PAGE_CACHE_MASK;
count = get_pgcnt(size, offset);
assert(idx + count <= tio->pg_cnt);
assert(count <= ISCSI_CONN_IOV_MAX);
sg_init_table(sg, ARRAY_SIZE(cmnd->conn->hash_sg));
crypto_hash_init(hash);
for (i = 0; size; i++) {
if (offset + size > PAGE_CACHE_SIZE)
length = PAGE_CACHE_SIZE - offset;
else
length = size;
sg_set_page(&sg[i], tio->pvec[idx + i], length, offset);
size -= length;
offset = 0;
}
sg_mark_end(&sg[i - 1]);
crypto_hash_update(hash, sg, nbytes);
crypto_hash_final(hash, crc);
}
static void calc_checksums(char *buf)
{
struct crypto_hash *tfm;
struct hash_desc desc;
struct scatterlist sg;
char sha1[40];
int i;
int ret;
tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
return;
}
desc.tfm = tfm;
desc.flags = 0;
ret = crypto_hash_init(&desc);
if (ret < 0)
goto out;
sg_init_one(&sg, inbuf, inbuf_size);
ret = crypto_hash_update(&desc, &sg, inbuf_size);
if (ret < 0)
goto out;
ret = crypto_hash_final(&desc, sha1);
if (ret < 0)
goto out;
for (i = 0; i < 20; i++) {
sprintf(&buf[i * 2], "%02x", sha1[i] & 0xff);
}
out:
crypto_free_hash(tfm);
}
void mars_digest(unsigned char *digest, void *data, int len)
{
struct hash_desc desc = {
.tfm = mars_tfm,
.flags = 0,
};
struct scatterlist sg;
memset(digest, 0, mars_digest_size);
// TODO: use per-thread instance, omit locking
down(&tfm_sem);
crypto_hash_init(&desc);
sg_init_table(&sg, 1);
sg_set_buf(&sg, data, len);
crypto_hash_update(&desc, &sg, sg.length);
crypto_hash_final(&desc, digest);
up(&tfm_sem);
}
EXPORT_SYMBOL_GPL(mars_digest);
void mref_checksum(struct mref_object *mref)
{
unsigned char checksum[mars_digest_size];
int len;
if (mref->ref_cs_mode <= 0 || !mref->ref_data)
return;
mars_digest(checksum, mref->ref_data, mref->ref_len);
len = sizeof(mref->ref_checksum);
if (len > mars_digest_size)
len = mars_digest_size;
memcpy(&mref->ref_checksum, checksum, len);
}
static int pohmelfs_hash_iterator(struct pohmelfs_crypto_engine *e,
struct scatterlist *sg_dst, struct scatterlist *sg_src)
{
return crypto_hash_update(e->data, sg_src, sg_src->length);
}