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check_nonce_nc(): improved readability, fixed comments

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This commit is contained in:
Evgeny Grin (Karlson2k)
2022-05-01 16:08:17 +03:00
parent 628a28d607
commit a3527f080a
1 changed files with 5 additions and 3 deletions
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src/microhttpd/digestauth.c
+5 -3
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@@ -614,6 +614,8 @@ check_nonce_nc (struct MHD_Connection *connection,
if ( (0 != memcmp (nn->nonce, nonce, noncelen)) ||
(0 != nn->nonce[noncelen]) )
ret = false; /* Nonce does not match, fail */
else if (nc == nn->nc)
ret = false; /* 'nc' was already used */
/* Note that we use 64 here, as we do not store the
bit for 'nn->nc' itself in 'nn->nmask' */
else if ( (nc < nn->nc) &&
@@ -625,11 +627,11 @@ check_nonce_nc (struct MHD_Connection *connection,
nn->nmask |= (1LLU << (nn->nc - nc - 1));
ret = true;
}
else if (nc <= nn->nc)
ret = false; /* Nonce does not match, fail */
else if (nc < nn->nc)
ret = false; /* 'nc' does not match, fail */
else
{
/* Nonce is larger, shift bitmask and bump limit */
/* 'nc' is larger, shift bitmask and bump limit */
if (64 > nc - nn->nc)
nn->nmask <<= (nc - nn->nc); /* small jump, less than mask width */
else