void crypto_hmac_final(struct crypto_tfm *tfm, u8 *key,
unsigned int *keylen, u8 *out)
{
unsigned int i;
struct scatterlist tmp;
char *opad = tfm->crt_digest.dit_hmac_block;
if (*keylen > crypto_tfm_alg_blocksize(tfm)) {
hash_key(tfm, key, *keylen);
*keylen = crypto_tfm_alg_digestsize(tfm);
}
crypto_digest_final(tfm, out);
memset(opad, 0, crypto_tfm_alg_blocksize(tfm));
memcpy(opad, key, *keylen);
for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++)
opad[i] ^= 0x5c;
tmp.page = virt_to_page(opad);
tmp.offset = offset_in_page(opad);
tmp.length = crypto_tfm_alg_blocksize(tfm);
crypto_digest_init(tfm);
crypto_digest_update(tfm, &tmp, 1);
tmp.page = virt_to_page(out);
tmp.offset = offset_in_page(out);
tmp.length = crypto_tfm_alg_digestsize(tfm);
crypto_digest_update(tfm, &tmp, 1);
crypto_digest_final(tfm, out);
}
static int digsig_sha1_final(SIGCTX * ctx, char *digest)
{
/* TO DO: check the length of the signature: it should be equal to the length
of the modulus */
if (ctx == NULL)
return -EINVAL;
crypto_digest_final(ctx->tfm, digest);
return 0;
}
/*
* Get the final digest.
*/
int
smb_md5_final(smb_sign_ctx_t ctx, uint8_t *digest16)
{
crypto_data_t out;
int rv;
bzero(&out, sizeof (out));
out.cd_format = CRYPTO_DATA_RAW;
out.cd_length = MD5_DIGEST_LENGTH;
out.cd_raw.iov_len = MD5_DIGEST_LENGTH;
out.cd_raw.iov_base = (void *)digest16;
rv = crypto_digest_final(ctx, &out, 0);
return (rv == CRYPTO_SUCCESS ? 0 : -1);
}
int do_digest(char *code, char **result)
{
char *ret;
int len = strlen(code);
tfm = crypto_alloc_tfm("sha1", 0);
if (IS_ERR(tfm))
return -1;
sg_init_one(&sg, code, len);
ret = (char *)kmalloc(50, GFP_KERNEL);
if (!result) {
crypto_free_tfm(tfm);
return -1;
}
memset(ret, 0, 50);
crypto_digest_final(tfm, result);
crypto_free_tfm(tfm);
*result = ret;
return 0;
}
/**
* iscsi_tcp_data_recv - TCP receive in sendfile fashion
* @rd_desc: read descriptor
* @skb: socket buffer
* @offset: offset in skb
* @len: skb->len - offset
**/
static int
iscsi_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
unsigned int offset, size_t len)
{
int rc;
struct iscsi_conn *conn = rd_desc->arg.data;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
int processed;
char pad[ISCSI_PAD_LEN];
struct scatterlist sg;
/*
* Save current SKB and its offset in the corresponding
* connection context.
*/
tcp_conn->in.copy = skb->len - offset;
tcp_conn->in.offset = offset;
tcp_conn->in.skb = skb;
tcp_conn->in.len = tcp_conn->in.copy;
BUG_ON(tcp_conn->in.copy <= 0);
debug_tcp("in %d bytes\n", tcp_conn->in.copy);
more:
tcp_conn->in.copied = 0;
rc = 0;
if (unlikely(conn->suspend_rx)) {
debug_tcp("conn %d Rx suspended!\n", conn->id);
return 0;
}
if (tcp_conn->in_progress == IN_PROGRESS_WAIT_HEADER ||
tcp_conn->in_progress == IN_PROGRESS_HEADER_GATHER) {
rc = iscsi_hdr_extract(tcp_conn);
if (rc) {
if (rc == -EAGAIN)
goto nomore;
else {
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
return 0;
}
}
/*
* Verify and process incoming PDU header.
*/
rc = tcp_conn->ops->hdr_recv(conn);
if (!rc && tcp_conn->in.datalen) {
if (conn->datadgst_en) {
BUG_ON(!tcp_conn->data_rx_tfm);
crypto_digest_init(tcp_conn->data_rx_tfm);
}
tcp_conn->in_progress = IN_PROGRESS_DATA_RECV;
} else if (rc) {
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
return 0;
}
}
if (tcp_conn->in_progress == IN_PROGRESS_DDIGEST_RECV) {
uint32_t recv_digest;
debug_tcp("extra data_recv offset %d copy %d\n",
tcp_conn->in.offset, tcp_conn->in.copy);
skb_copy_bits(tcp_conn->in.skb, tcp_conn->in.offset,
&recv_digest, 4);
tcp_conn->in.offset += 4;
tcp_conn->in.copy -= 4;
if (recv_digest != tcp_conn->in.datadgst) {
debug_tcp("iscsi_tcp: data digest error!"
"0x%x != 0x%x\n", recv_digest,
tcp_conn->in.datadgst);
iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
return 0;
} else {
debug_tcp("iscsi_tcp: data digest match!"
"0x%x == 0x%x\n", recv_digest,
tcp_conn->in.datadgst);
tcp_conn->in_progress = IN_PROGRESS_WAIT_HEADER;
}
}
if (unlikely(conn->suspend_rx)) {
debug_tcp("conn %d Rx suspended!\n", conn->id);
goto nomore;
}
if (tcp_conn->in_progress == IN_PROGRESS_DATA_RECV &&
tcp_conn->in.copy) {
debug_tcp("data_recv offset %d copy %d\n",
tcp_conn->in.offset, tcp_conn->in.copy);
rc = tcp_conn->ops->data_recv(conn);
if (rc) {
if (rc == -EAGAIN)
goto again;
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
return 0;
}
tcp_conn->in.copy -= tcp_conn->in.padding;
tcp_conn->in.offset += tcp_conn->in.padding;
if (conn->datadgst_en) {
if (tcp_conn->in.padding) {
debug_tcp("padding -> %d\n",
tcp_conn->in.padding);
memset(pad, 0, tcp_conn->in.padding);
sg_init_one(&sg, pad, tcp_conn->in.padding);
crypto_digest_update(tcp_conn->data_rx_tfm,
&sg, 1);
}
crypto_digest_final(tcp_conn->data_rx_tfm,
(u8 *) & tcp_conn->in.datadgst);
debug_tcp("rx digest 0x%x\n", tcp_conn->in.datadgst);
tcp_conn->in_progress = IN_PROGRESS_DDIGEST_RECV;
} else
tcp_conn->in_progress = IN_PROGRESS_WAIT_HEADER;
}
debug_tcp("f, processed %d from out of %d padding %d\n",
tcp_conn->in.offset - offset, (int)len, tcp_conn->in.padding);
BUG_ON(tcp_conn->in.offset - offset > len);
if (tcp_conn->in.offset - offset != len) {
debug_tcp("continue to process %d bytes\n",
(int)len - (tcp_conn->in.offset - offset));
goto more;
}
nomore:
processed = tcp_conn->in.offset - offset;
BUG_ON(processed == 0);
return processed;
again:
processed = tcp_conn->in.offset - offset;
debug_tcp("c, processed %d from out of %d rd_desc_cnt %d\n",
processed, (int)len, (int)rd_desc->count);
BUG_ON(processed == 0);
BUG_ON(processed > len);
conn->rxdata_octets += processed;
return processed;
}
int
k5_ef_hash(krb5_context context, int icount,
const krb5_data *input,
krb5_data *output)
{
int i;
int rv = CRYPTO_FAILED;
iovec_t v1, v2;
crypto_data_t d1, d2;
crypto_mechanism_t mech;
crypto_context_t ctxp;
KRB5_LOG0(KRB5_INFO, "k5_ef_hash() start");
bzero(&d1, sizeof (d1));
bzero(&d2, sizeof (d2));
v2.iov_base = (void *)output->data;
v2.iov_len = output->length;
d2.cd_format = CRYPTO_DATA_RAW;
d2.cd_offset = 0;
d2.cd_length = output->length;
d2.cd_raw = v2;
mech.cm_type = context->kef_cksum_mt;
if (mech.cm_type == CRYPTO_MECH_INVALID) {
KRB5_LOG(KRB5_ERR,
"k5_ef_hash() invalid mech specified: 0x%llx",
(long long)context->kef_hash_mt);
return (CRYPTO_FAILED);
}
mech.cm_param = 0;
mech.cm_param_len = 0;
rv = crypto_digest_init(&mech, &ctxp, NULL);
if (rv != CRYPTO_SUCCESS) {
KRB5_LOG(KRB5_ERR, "crypto_digest_init error: %0x", rv);
return (rv);
}
for (i = 0; i < icount; i++) {
v1.iov_base = (void *)input[i].data;
v1.iov_len = input[i].length;
d1.cd_length = input[i].length;
d1.cd_format = CRYPTO_DATA_RAW;
d1.cd_offset = 0;
d1.cd_raw = v1;
rv = crypto_digest_update(ctxp, &d1, NULL);
if (rv != CRYPTO_SUCCESS) {
KRB5_LOG(KRB5_ERR,
"crypto_digest_update error: %0x", rv);
crypto_cancel_ctx(ctxp);
return (rv);
}
}
rv = crypto_digest_final(ctxp, &d2, NULL);
/*
* crypto_digest_final() internally destroys the context. So, we
* do not use the context any more. This means we do not call
* crypto_cancel_ctx() for the failure case here unlike the failure
* case of crypto_digest_update() where we do.
*/
if (rv != CRYPTO_SUCCESS) {
KRB5_LOG(KRB5_ERR, "crypto_digest_final error: %0x", rv);
}
return (rv);
}
int plaintext_to_sha1(unsigned char *hash,
const char *plaintext, unsigned int len)
{
struct page *page = NULL;
char *data = NULL;
int offset = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
struct crypto_hash *tfm = NULL;
struct scatterlist sg = {0};
struct hash_desc desc = {0};
page = alloc_page(GFP_KERNEL);
if (!page) {
return -ENOMEM;
}
data = (char *)page_address(page);
tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
__free_page(page);
return -EINVAL;
}
desc.tfm = tfm;
desc.flags = 0;
crypto_hash_init(&desc);
sg_init_one(&sg, (void *)data, PAGE_SIZE);
for (offset = 0; offset < len; offset += PAGE_SIZE) {
memset(data, 0x00, PAGE_SIZE);
/* Check if the data is page size or part of page */
if ((len - offset) >= PAGE_SIZE) {
memcpy(data, plaintext + offset, PAGE_SIZE);
crypto_hash_update(&desc, &sg, PAGE_SIZE);
} else {
memcpy(data, plaintext + offset, (len - offset));
sg_init_one(&sg, (void *)data, (len - offset));
crypto_hash_update(&desc, &sg, (len - offset));
}
}
crypto_hash_final(&desc, hash);
crypto_free_hash(tfm);
#else
struct crypto_tfm *tfm;
struct scatterlist sg;
page = alloc_page(GFP_KERNEL);
if (!page) {
return -ENOMEM;
}
data = (char *)page_address(page);
tfm = crypto_alloc_tfm("sha1", CRYPTO_TFM_REQ_MAY_SLEEP);
if (tfm == NULL) {
__free_page(page);
return -EINVAL;
}
crypto_digest_init(tfm);
sg_init_one(&sg, (u8 *)data, PAGE_SIZE);
for (offset = 0; offset < len; offset += PAGE_SIZE) {
memset(data, 0x00, PAGE_SIZE);
if ((len - offset) >= PAGE_SIZE) {
memcpy(data, plaintext + offset, PAGE_SIZE);
crypto_digest_update(tfm, &sg, 1);
} else {
memcpy(data, plaintext + offset, (len - offset));
sg_init_one(&sg, (u8 *)data, (len - offset));
crypto_digest_update(tfm, &sg, 1);
}
}
crypto_digest_final(tfm, hash);
crypto_free_tfm(tfm);
#endif
__free_page(page);
return 0;
}
