wolfcrypt/src/asn.c: fix -Wstringop-truncation from gcc-16.0.0_p20260104 in KeyPemToDerPassCb().

douzzer · douzzer · commit e0db99218fb6 · 2026-01-13T11:21:39.000-06:00
diff --git a/wolfcrypt/src/asn.c b/wolfcrypt/src/asn.c
@@ -27660,8 +27660,8 @@ static int KeyPemToDerPassCb(char* passwd, int sz, int rw, void* userdata)
     if (userdata == NULL)
         return 0;
 
-    XSTRNCPY(passwd, (char*)userdata, (size_t)sz);
-    return (int)min((word32)sz, (word32)XSTRLEN((char*)userdata));
+    XSTRLCPY(passwd, (char*)userdata, (size_t)sz);
+    return (int)min((word32)(sz - 1), (word32)XSTRLEN((char*)userdata));
 }
 #endif
 

Original file line number	Diff line number	Diff line change
`@@ -27660,8 +27660,8 @@ static int KeyPemToDerPassCb(char* passwd, int sz, int rw, void* userdata)`
`27660`	`27660`	`if (userdata == NULL)`
`27661`	`27661`	`return 0;`
`27662`	`27662`
`27663`		`- XSTRNCPY(passwd, (char*)userdata, (size_t)sz);`
`27664`		`- return (int)min((word32)sz, (word32)XSTRLEN((char*)userdata));`
	`27663`	`+ XSTRLCPY(passwd, (char*)userdata, (size_t)sz);`
	`27664`	`+ return (int)min((word32)(sz - 1), (word32)XSTRLEN((char*)userdata));`
`27665`	`27665`	`}`
`27666`	`27666`	`#endif`
`27667`	`27667`