lib/chkhash.c: is_valid_hash(): Update minimum hash lenght

alejandro-colomar · alejandro-colomar · commit 71945a51ff56 · 2025-12-27T14:43:55.000+01:00
49 corresponds to the minimum SHA256 hash length.

Signed-off-by: Alejandro Colomar &lt;alx@kernel.org&gt;
diff --git a/lib/chkhash.c b/lib/chkhash.c
@@ -38,7 +38,7 @@ bool
 is_valid_hash(const char *hash) 
 {
 	// Minimum hash length
-	if (strlen(hash) < 13)
+	if (strlen(hash) < 49)
 		return false;
 
 	// Yescrypt: $y$ + algorithm parameters + $ + salt + $ + 43-char (minimum) hash

Original file line number	Diff line number	Diff line change
`@@ -38,7 +38,7 @@ bool`
`38`	`38`	`is_valid_hash(const char *hash)`
`39`	`39`	`{`
`40`	`40`	`// Minimum hash length`
`41`		`- if (strlen(hash) < 13)`
	`41`	`+ if (strlen(hash) < 49)`
`42`	`42`	`return false;`
`43`	`43`
`44`	`44`	`// Yescrypt: $y$ + algorithm parameters + $ + salt + $ + 43-char (minimum) hash`