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scsi: target: iscsi: Do not require target authentication

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RFC7143 states that Initiator decides what type of authentication to
use:

The initiator MUST continue with:
    CHAP_N=<N> CHAP_R=<R>
or, if it requires target authentication, with:
    CHAP_N=<N> CHAP_R=<R> CHAP_I=<I> CHAP_C=<C>

Allow one way authentication if mutual authentication is configured.  That
passes some tests from Windows HLK for Mutual CHAP with iSNS.

Link: https://lore.kernel.org/r/20220718152555.17084-5-d.bogdanov@yadro.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Dmitry Bogdanov 2022-07-18 18:25:55 +03:00 committed by Martin K. Petersen
parent e52b904b49
commit 292cef5e62
2 changed files with 12 additions and 6 deletions
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8
drivers/target/iscsi/iscsi_target_auth.c
View file

@ -416,7 +416,13 @@ static int chap_server_compute_hash(
/*
* Get CHAP_I.
*/
if (extract_param(nr_in_ptr, "CHAP_I", 10, identifier, &type) < 0) {
ret = extract_param(nr_in_ptr, "CHAP_I", 10, identifier, &type);
if (ret == -ENOENT) {
pr_debug("Could not find CHAP_I. Initiator uses One way authentication.\n");
auth_ret = 0;
goto out;
}
if (ret < 0) {
pr_err("Could not find CHAP_I.\n");
goto out;
}

10
drivers/target/iscsi/iscsi_target_nego.c
View file

@ -62,15 +62,15 @@ int extract_param(
int len;
if (!in_buf || !pattern || !out_buf || !type)
return -1;
return -EINVAL;
ptr = strstr(in_buf, pattern);
if (!ptr)
return -1;
return -ENOENT;
ptr = strstr(ptr, "=");
if (!ptr)
return -1;
return -EINVAL;
ptr += 1;
if (*ptr == '0' && (*(ptr+1) == 'x' || *(ptr+1) == 'X')) {
@ -84,12 +84,12 @@ int extract_param(
len = strlen_semi(ptr);
if (len < 0)
return -1;
return -EINVAL;
if (len >= max_length) {
pr_err("Length of input: %d exceeds max_length:"
" %d\n", len, max_length);
return -1;
return -EINVAL;
}
memcpy(out_buf, ptr, len);
out_buf[len] = '\0';