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-rw-r--r--lc4.py8
1 files changed, 5 insertions, 3 deletions
diff --git a/lc4.py b/lc4.py
index 5a2785f..fea2f7a 100644
--- a/lc4.py
+++ b/lc4.py
@@ -151,9 +151,11 @@ def rotate_marker_down(m, col, n):
return ((m[0] + n) % size, m[1])
-def derive_key(password):
+def derive_key(password, one_indexed):
i = 0
k = letters
+ # if using one-indexed arrays, moves the zero element to the end
+ if one_indexed: k = k[1:]+k[0]
for c in password:
(row, col) = find_ix(c)
k = rotate_down(rotate_right(k, i, col), i, row)
@@ -295,7 +297,7 @@ def test1(size, fixednonce):
else:
keyword = 's3cret_p4ssw0rd/31337'
szkeyword = keyword # This statement needed to show keyword in printinfo() [don't change args.keywordstring within test1()!]
- key = derive_key(keyword)
+ key = derive_key(keyword, false)
else:
key = letters
initialkey = key
@@ -433,7 +435,7 @@ if __name__ == '__main__':
if args.keywordfile: args.keywordstring = open(args.keywordfile, 'r').read().rstrip('\r\n')
if args.keywordstring:
szkeyword = args.keywordstring
- key = derive_key(args.keywordstring)
+ key = derive_key(args.keywordstring, args.playingcard)
if args.keyfile: args.keystring = open(args.keyfile, 'r').read().rstrip('\r\n')
if args.keystring: key = args.keystring;