.text:0040191B         mov eax, R1
.text:00401920         cmp al, 21h
.text:00401922         jnb short loc_401926
.text:00401924         add al, 21h
.text:00401926 loc_401926:
.text:00401926         lea ebx, password
.text:0040192C         mov cl, keyindex
.text:00401932         mov dl, [ecx+ebx]
.text:00401935         cmp al, dl
.text:00401937         jz short password_byte_is_ok