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-rw-r--r--drivers/target/iscsi/cxgbit/cxgbit_ddp.c3
-rw-r--r--drivers/target/iscsi/iscsi_target.c24
-rw-r--r--drivers/target/iscsi/iscsi_target_auth.c232
-rw-r--r--drivers/target/iscsi/iscsi_target_auth.h17
-rw-r--r--drivers/target/iscsi/iscsi_target_parameters.h3
5 files changed, 175 insertions, 104 deletions
diff --git a/drivers/target/iscsi/cxgbit/cxgbit_ddp.c b/drivers/target/iscsi/cxgbit/cxgbit_ddp.c
index 54bb1ebd8eb5..af35251232eb 100644
--- a/drivers/target/iscsi/cxgbit/cxgbit_ddp.c
+++ b/drivers/target/iscsi/cxgbit/cxgbit_ddp.c
@@ -297,7 +297,6 @@ int cxgbit_ddp_init(struct cxgbit_device *cdev)
struct cxgb4_lld_info *lldi = &cdev->lldi;
struct net_device *ndev = cdev->lldi.ports[0];
struct cxgbi_tag_format tformat;
- unsigned int ppmax;
int ret, i;
if (!lldi->vr->iscsi.size) {
@@ -305,8 +304,6 @@ int cxgbit_ddp_init(struct cxgbit_device *cdev)
return -EACCES;
}
- ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;
-
memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
for (i = 0; i < 4; i++)
tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index d19e051f2bc2..7251a87bb576 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1165,7 +1165,9 @@ int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length,
conn->cid);
- target_get_sess_cmd(&cmd->se_cmd, true);
+ if (target_get_sess_cmd(&cmd->se_cmd, true) < 0)
+ return iscsit_add_reject_cmd(cmd,
+ ISCSI_REASON_WAITING_FOR_LOGOUT, buf);
cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd,
scsilun_to_int(&hdr->lun));
@@ -2002,7 +2004,9 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
conn->sess->se_sess, 0, DMA_NONE,
TCM_SIMPLE_TAG, cmd->sense_buffer + 2);
- target_get_sess_cmd(&cmd->se_cmd, true);
+ if (target_get_sess_cmd(&cmd->se_cmd, true) < 0)
+ return iscsit_add_reject_cmd(cmd,
+ ISCSI_REASON_WAITING_FOR_LOGOUT, buf);
/*
* TASK_REASSIGN for ERL=2 / connection stays inside of
@@ -2189,24 +2193,22 @@ iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
}
goto empty_sendtargets;
}
- if (strncmp("SendTargets", text_in, 11) != 0) {
+ if (strncmp("SendTargets=", text_in, 12) != 0) {
pr_err("Received Text Data that is not"
" SendTargets, cannot continue.\n");
goto reject;
}
+ /* '=' confirmed in strncmp */
text_ptr = strchr(text_in, '=');
- if (!text_ptr) {
- pr_err("No \"=\" separator found in Text Data,"
- " cannot continue.\n");
- goto reject;
- }
- if (!strncmp("=All", text_ptr, 4)) {
+ BUG_ON(!text_ptr);
+ if (!strncmp("=All", text_ptr, 5)) {
cmd->cmd_flags |= ICF_SENDTARGETS_ALL;
} else if (!strncmp("=iqn.", text_ptr, 5) ||
!strncmp("=eui.", text_ptr, 5)) {
cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE;
} else {
- pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr);
+ pr_err("Unable to locate valid SendTargets%s value\n",
+ text_ptr);
goto reject;
}
@@ -4232,6 +4234,8 @@ int iscsit_close_connection(
* must wait until they have completed.
*/
iscsit_check_conn_usage_count(conn);
+ target_sess_cmd_list_set_waiting(sess->se_sess);
+ target_wait_for_sess_cmds(sess->se_sess);
ahash_request_free(conn->conn_tx_hash);
if (conn->conn_rx_hash) {
diff --git a/drivers/target/iscsi/iscsi_target_auth.c b/drivers/target/iscsi/iscsi_target_auth.c
index 51ddca2033e0..0e54627d9aa8 100644
--- a/drivers/target/iscsi/iscsi_target_auth.c
+++ b/drivers/target/iscsi/iscsi_target_auth.c
@@ -18,6 +18,22 @@
#include "iscsi_target_nego.h"
#include "iscsi_target_auth.h"
+static char *chap_get_digest_name(const int digest_type)
+{
+ switch (digest_type) {
+ case CHAP_DIGEST_MD5:
+ return "md5";
+ case CHAP_DIGEST_SHA1:
+ return "sha1";
+ case CHAP_DIGEST_SHA256:
+ return "sha256";
+ case CHAP_DIGEST_SHA3_256:
+ return "sha3-256";
+ default:
+ return NULL;
+ }
+}
+
static int chap_gen_challenge(
struct iscsi_conn *conn,
int caller,
@@ -25,16 +41,21 @@ static int chap_gen_challenge(
unsigned int *c_len)
{
int ret;
- unsigned char challenge_asciihex[CHAP_CHALLENGE_LENGTH * 2 + 1];
+ unsigned char *challenge_asciihex;
struct iscsi_chap *chap = conn->auth_protocol;
- memset(challenge_asciihex, 0, CHAP_CHALLENGE_LENGTH * 2 + 1);
+ challenge_asciihex = kzalloc(chap->challenge_len * 2 + 1, GFP_KERNEL);
+ if (!challenge_asciihex)
+ return -ENOMEM;
- ret = get_random_bytes_wait(chap->challenge, CHAP_CHALLENGE_LENGTH);
+ memset(chap->challenge, 0, MAX_CHAP_CHALLENGE_LEN);
+
+ ret = get_random_bytes_wait(chap->challenge, chap->challenge_len);
if (unlikely(ret))
- return ret;
+ goto out;
+
bin2hex(challenge_asciihex, chap->challenge,
- CHAP_CHALLENGE_LENGTH);
+ chap->challenge_len);
/*
* Set CHAP_C, and copy the generated challenge into c_str.
*/
@@ -43,12 +64,29 @@ static int chap_gen_challenge(
pr_debug("[%s] Sending CHAP_C=0x%s\n\n", (caller) ? "server" : "client",
challenge_asciihex);
+
+out:
+ kfree(challenge_asciihex);
+ return ret;
+}
+
+static int chap_test_algorithm(const char *name)
+{
+ struct crypto_shash *tfm;
+
+ tfm = crypto_alloc_shash(name, 0, 0);
+ if (IS_ERR(tfm))
+ return -1;
+
+ crypto_free_shash(tfm);
return 0;
}
static int chap_check_algorithm(const char *a_str)
{
- char *tmp, *orig, *token;
+ char *tmp, *orig, *token, *digest_name;
+ long digest_type;
+ int r = CHAP_DIGEST_UNKNOWN;
tmp = kstrdup(a_str, GFP_KERNEL);
if (!tmp) {
@@ -70,15 +108,24 @@ static int chap_check_algorithm(const char *a_str)
if (!token)
goto out;
- if (!strncmp(token, "5", 1)) {
- pr_debug("Selected MD5 Algorithm\n");
- kfree(orig);
- return CHAP_DIGEST_MD5;
+ if (kstrtol(token, 10, &digest_type))
+ continue;
+
+ digest_name = chap_get_digest_name(digest_type);
+ if (!digest_name)
+ continue;
+
+ pr_debug("Selected %s Algorithm\n", digest_name);
+ if (chap_test_algorithm(digest_name) < 0) {
+ pr_err("failed to allocate %s algo\n", digest_name);
+ } else {
+ r = digest_type;
+ goto out;
}
}
out:
kfree(orig);
- return CHAP_DIGEST_UNKNOWN;
+ return r;
}
static void chap_close(struct iscsi_conn *conn)
@@ -94,7 +141,7 @@ static struct iscsi_chap *chap_server_open(
char *aic_str,
unsigned int *aic_len)
{
- int ret;
+ int digest_type;
struct iscsi_chap *chap;
if (!(auth->naf_flags & NAF_USERID_SET) ||
@@ -109,17 +156,19 @@ static struct iscsi_chap *chap_server_open(
return NULL;
chap = conn->auth_protocol;
- ret = chap_check_algorithm(a_str);
- switch (ret) {
+ digest_type = chap_check_algorithm(a_str);
+ switch (digest_type) {
case CHAP_DIGEST_MD5:
- pr_debug("[server] Got CHAP_A=5\n");
- /*
- * Send back CHAP_A set to MD5.
- */
- *aic_len = sprintf(aic_str, "CHAP_A=5");
- *aic_len += 1;
- chap->digest_type = CHAP_DIGEST_MD5;
- pr_debug("[server] Sending CHAP_A=%d\n", chap->digest_type);
+ chap->digest_size = MD5_SIGNATURE_SIZE;
+ break;
+ case CHAP_DIGEST_SHA1:
+ chap->digest_size = SHA1_SIGNATURE_SIZE;
+ break;
+ case CHAP_DIGEST_SHA256:
+ chap->digest_size = SHA256_SIGNATURE_SIZE;
+ break;
+ case CHAP_DIGEST_SHA3_256:
+ chap->digest_size = SHA3_256_SIGNATURE_SIZE;
break;
case CHAP_DIGEST_UNKNOWN:
default:
@@ -128,6 +177,16 @@ static struct iscsi_chap *chap_server_open(
return NULL;
}
+ chap->digest_name = chap_get_digest_name(digest_type);
+
+ /* Tie the challenge length to the digest size */
+ chap->challenge_len = chap->digest_size;
+
+ pr_debug("[server] Got CHAP_A=%d\n", digest_type);
+ *aic_len = sprintf(aic_str, "CHAP_A=%d", digest_type);
+ *aic_len += 1;
+ pr_debug("[server] Sending CHAP_A=%d\n", digest_type);
+
/*
* Set Identifier.
*/
@@ -146,7 +205,7 @@ static struct iscsi_chap *chap_server_open(
return chap;
}
-static int chap_server_compute_md5(
+static int chap_server_compute_hash(
struct iscsi_conn *conn,
struct iscsi_node_auth *auth,
char *nr_in_ptr,
@@ -155,36 +214,57 @@ static int chap_server_compute_md5(
{
unsigned long id;
unsigned char id_as_uchar;
- unsigned char digest[MD5_SIGNATURE_SIZE];
- unsigned char type, response[MD5_SIGNATURE_SIZE * 2 + 2];
- unsigned char identifier[10], *challenge = NULL;
- unsigned char *challenge_binhex = NULL;
- unsigned char client_digest[MD5_SIGNATURE_SIZE];
- unsigned char server_digest[MD5_SIGNATURE_SIZE];
+ unsigned char type;
+ unsigned char identifier[10], *initiatorchg = NULL;
+ unsigned char *initiatorchg_binhex = NULL;
+ unsigned char *digest = NULL;
+ unsigned char *response = NULL;
+ unsigned char *client_digest = NULL;
+ unsigned char *server_digest = NULL;
unsigned char chap_n[MAX_CHAP_N_SIZE], chap_r[MAX_RESPONSE_LENGTH];
size_t compare_len;
struct iscsi_chap *chap = conn->auth_protocol;
struct crypto_shash *tfm = NULL;
struct shash_desc *desc = NULL;
- int auth_ret = -1, ret, challenge_len;
+ int auth_ret = -1, ret, initiatorchg_len;
+
+ digest = kzalloc(chap->digest_size, GFP_KERNEL);
+ if (!digest) {
+ pr_err("Unable to allocate the digest buffer\n");
+ goto out;
+ }
+
+ response = kzalloc(chap->digest_size * 2 + 2, GFP_KERNEL);
+ if (!response) {
+ pr_err("Unable to allocate the response buffer\n");
+ goto out;
+ }
+
+ client_digest = kzalloc(chap->digest_size, GFP_KERNEL);
+ if (!client_digest) {
+ pr_err("Unable to allocate the client_digest buffer\n");
+ goto out;
+ }
+
+ server_digest = kzalloc(chap->digest_size, GFP_KERNEL);
+ if (!server_digest) {
+ pr_err("Unable to allocate the server_digest buffer\n");
+ goto out;
+ }
memset(identifier, 0, 10);
memset(chap_n, 0, MAX_CHAP_N_SIZE);
memset(chap_r, 0, MAX_RESPONSE_LENGTH);
- memset(digest, 0, MD5_SIGNATURE_SIZE);
- memset(response, 0, MD5_SIGNATURE_SIZE * 2 + 2);
- memset(client_digest, 0, MD5_SIGNATURE_SIZE);
- memset(server_digest, 0, MD5_SIGNATURE_SIZE);
- challenge = kzalloc(CHAP_CHALLENGE_STR_LEN, GFP_KERNEL);
- if (!challenge) {
+ initiatorchg = kzalloc(CHAP_CHALLENGE_STR_LEN, GFP_KERNEL);
+ if (!initiatorchg) {
pr_err("Unable to allocate challenge buffer\n");
goto out;
}
- challenge_binhex = kzalloc(CHAP_CHALLENGE_STR_LEN, GFP_KERNEL);
- if (!challenge_binhex) {
- pr_err("Unable to allocate challenge_binhex buffer\n");
+ initiatorchg_binhex = kzalloc(CHAP_CHALLENGE_STR_LEN, GFP_KERNEL);
+ if (!initiatorchg_binhex) {
+ pr_err("Unable to allocate initiatorchg_binhex buffer\n");
goto out;
}
/*
@@ -219,18 +299,18 @@ static int chap_server_compute_md5(
pr_err("Could not find CHAP_R.\n");
goto out;
}
- if (strlen(chap_r) != MD5_SIGNATURE_SIZE * 2) {
+ if (strlen(chap_r) != chap->digest_size * 2) {
pr_err("Malformed CHAP_R\n");
goto out;
}
- if (hex2bin(client_digest, chap_r, MD5_SIGNATURE_SIZE) < 0) {
+ if (hex2bin(client_digest, chap_r, chap->digest_size) < 0) {
pr_err("Malformed CHAP_R\n");
goto out;
}
pr_debug("[server] Got CHAP_R=%s\n", chap_r);
- tfm = crypto_alloc_shash("md5", 0, 0);
+ tfm = crypto_alloc_shash(chap->digest_name, 0, 0);
if (IS_ERR(tfm)) {
tfm = NULL;
pr_err("Unable to allocate struct crypto_shash\n");
@@ -265,21 +345,23 @@ static int chap_server_compute_md5(
}
ret = crypto_shash_finup(desc, chap->challenge,
- CHAP_CHALLENGE_LENGTH, server_digest);
+ chap->challenge_len, server_digest);
if (ret < 0) {
pr_err("crypto_shash_finup() failed for challenge\n");
goto out;
}
- bin2hex(response, server_digest, MD5_SIGNATURE_SIZE);
- pr_debug("[server] MD5 Server Digest: %s\n", response);
+ bin2hex(response, server_digest, chap->digest_size);
+ pr_debug("[server] %s Server Digest: %s\n",
+ chap->digest_name, response);
- if (memcmp(server_digest, client_digest, MD5_SIGNATURE_SIZE) != 0) {
- pr_debug("[server] MD5 Digests do not match!\n\n");
+ if (memcmp(server_digest, client_digest, chap->digest_size) != 0) {
+ pr_debug("[server] %s Digests do not match!\n\n",
+ chap->digest_name);
goto out;
} else
- pr_debug("[server] MD5 Digests match, CHAP connection"
- " successful.\n\n");
+ pr_debug("[server] %s Digests match, CHAP connection"
+ " successful.\n\n", chap->digest_name);
/*
* One way authentication has succeeded, return now if mutual
* authentication is not enabled.
@@ -317,7 +399,7 @@ static int chap_server_compute_md5(
* Get CHAP_C.
*/
if (extract_param(nr_in_ptr, "CHAP_C", CHAP_CHALLENGE_STR_LEN,
- challenge, &type) < 0) {
+ initiatorchg, &type) < 0) {
pr_err("Could not find CHAP_C.\n");
goto out;
}
@@ -326,26 +408,28 @@ static int chap_server_compute_md5(
pr_err("Could not find CHAP_C.\n");
goto out;
}
- challenge_len = DIV_ROUND_UP(strlen(challenge), 2);
- if (!challenge_len) {
+ initiatorchg_len = DIV_ROUND_UP(strlen(initiatorchg), 2);
+ if (!initiatorchg_len) {
pr_err("Unable to convert incoming challenge\n");
goto out;
}
- if (challenge_len > 1024) {
+ if (initiatorchg_len > 1024) {
pr_err("CHAP_C exceeds maximum binary size of 1024 bytes\n");
goto out;
}
- if (hex2bin(challenge_binhex, challenge, challenge_len) < 0) {
+ if (hex2bin(initiatorchg_binhex, initiatorchg, initiatorchg_len) < 0) {
pr_err("Malformed CHAP_C\n");
goto out;
}
- pr_debug("[server] Got CHAP_C=%s\n", challenge);
+ pr_debug("[server] Got CHAP_C=%s\n", initiatorchg);
/*
* During mutual authentication, the CHAP_C generated by the
* initiator must not match the original CHAP_C generated by
* the target.
*/
- if (!memcmp(challenge_binhex, chap->challenge, CHAP_CHALLENGE_LENGTH)) {
+ if (initiatorchg_len == chap->challenge_len &&
+ !memcmp(initiatorchg_binhex, chap->challenge,
+ initiatorchg_len)) {
pr_err("initiator CHAP_C matches target CHAP_C, failing"
" login attempt\n");
goto out;
@@ -377,7 +461,7 @@ static int chap_server_compute_md5(
/*
* Convert received challenge to binary hex.
*/
- ret = crypto_shash_finup(desc, challenge_binhex, challenge_len,
+ ret = crypto_shash_finup(desc, initiatorchg_binhex, initiatorchg_len,
digest);
if (ret < 0) {
pr_err("crypto_shash_finup() failed for ma challenge\n");
@@ -393,7 +477,7 @@ static int chap_server_compute_md5(
/*
* Convert response from binary hex to ascii hext.
*/
- bin2hex(response, digest, MD5_SIGNATURE_SIZE);
+ bin2hex(response, digest, chap->digest_size);
*nr_out_len += sprintf(nr_out_ptr + *nr_out_len, "CHAP_R=0x%s",
response);
*nr_out_len += 1;
@@ -403,33 +487,15 @@ out:
kzfree(desc);
if (tfm)
crypto_free_shash(tfm);
- kfree(challenge);
- kfree(challenge_binhex);
+ kfree(initiatorchg);
+ kfree(initiatorchg_binhex);
+ kfree(digest);
+ kfree(response);
+ kfree(server_digest);
+ kfree(client_digest);
return auth_ret;
}
-static int chap_got_response(
- struct iscsi_conn *conn,
- struct iscsi_node_auth *auth,
- char *nr_in_ptr,
- char *nr_out_ptr,
- unsigned int *nr_out_len)
-{
- struct iscsi_chap *chap = conn->auth_protocol;
-
- switch (chap->digest_type) {
- case CHAP_DIGEST_MD5:
- if (chap_server_compute_md5(conn, auth, nr_in_ptr,
- nr_out_ptr, nr_out_len) < 0)
- return -1;
- return 0;
- default:
- pr_err("Unknown CHAP digest type %d!\n",
- chap->digest_type);
- return -1;
- }
-}
-
u32 chap_main_loop(
struct iscsi_conn *conn,
struct iscsi_node_auth *auth,
@@ -448,7 +514,7 @@ u32 chap_main_loop(
return 0;
} else if (chap->chap_state == CHAP_STAGE_SERVER_AIC) {
convert_null_to_semi(in_text, *in_len);
- if (chap_got_response(conn, auth, in_text, out_text,
+ if (chap_server_compute_hash(conn, auth, in_text, out_text,
out_len) < 0) {
chap_close(conn);
return 2;
diff --git a/drivers/target/iscsi/iscsi_target_auth.h b/drivers/target/iscsi/iscsi_target_auth.h
index d5600ac30b53..fc75c1c20e23 100644
--- a/drivers/target/iscsi/iscsi_target_auth.h
+++ b/drivers/target/iscsi/iscsi_target_auth.h
@@ -6,14 +6,19 @@
#define CHAP_DIGEST_UNKNOWN 0
#define CHAP_DIGEST_MD5 5
-#define CHAP_DIGEST_SHA 6
+#define CHAP_DIGEST_SHA1 6
+#define CHAP_DIGEST_SHA256 7
+#define CHAP_DIGEST_SHA3_256 8
-#define CHAP_CHALLENGE_LENGTH 16
+#define MAX_CHAP_CHALLENGE_LEN 32
#define CHAP_CHALLENGE_STR_LEN 4096
-#define MAX_RESPONSE_LENGTH 64 /* sufficient for MD5 */
+#define MAX_RESPONSE_LENGTH 128 /* sufficient for SHA3 256 */
#define MAX_CHAP_N_SIZE 512
#define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */
+#define SHA1_SIGNATURE_SIZE 20 /* 20 bytes in a SHA1 message digest */
+#define SHA256_SIGNATURE_SIZE 32 /* 32 bytes in a SHA256 message digest */
+#define SHA3_256_SIGNATURE_SIZE 32 /* 32 bytes in a SHA3 256 message digest */
#define CHAP_STAGE_CLIENT_A 1
#define CHAP_STAGE_SERVER_AIC 2
@@ -28,9 +33,11 @@ extern u32 chap_main_loop(struct iscsi_conn *, struct iscsi_node_auth *, char *,
int *, int *);
struct iscsi_chap {
- unsigned char digest_type;
unsigned char id;
- unsigned char challenge[CHAP_CHALLENGE_LENGTH];
+ unsigned char challenge[MAX_CHAP_CHALLENGE_LEN];
+ unsigned int challenge_len;
+ unsigned char *digest_name;
+ unsigned int digest_size;
unsigned int authenticate_target;
unsigned int chap_state;
} ____cacheline_aligned;
diff --git a/drivers/target/iscsi/iscsi_target_parameters.h b/drivers/target/iscsi/iscsi_target_parameters.h
index daf47f38e081..240c4c4344f6 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.h
+++ b/drivers/target/iscsi/iscsi_target_parameters.h
@@ -93,9 +93,6 @@ extern void iscsi_set_session_parameters(struct iscsi_sess_ops *,
#define OFMARKER "OFMarker"
#define IFMARKINT "IFMarkInt"
#define OFMARKINT "OFMarkInt"
-#define X_EXTENSIONKEY "X-com.sbei.version"
-#define X_EXTENSIONKEY_CISCO_NEW "X-com.cisco.protocol"
-#define X_EXTENSIONKEY_CISCO_OLD "X-com.cisco.iscsi.draft"
/*
* Parameter names of iSCSI Extentions for RDMA (iSER). See RFC-5046
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.