Make crypt() do something more sane for Unicode

(take crypt() of the low eight bits of the characters,
instead of taking crypt() of the UTF-8 of the scalar);
add a test for crypt().

p4raw-id: //depot/perl@11852

1 files changed, 15 insertions, 0 deletions

diff --git a/t/op/crypt.t b/t/op/crypt.t
new file mode 100644
index 0000000000..26eb06a580
--- /dev/null
+++ b/t/op/crypt.t
@@ -0,0 +1,15 @@
+use Test::More tests => 2;
+
+# Can't assume too much about the string returned by crypt(),
+# and about how many bytes of the encrypted (really, hashed)
+# string matter.
+#
+# HISTORICALLY the results started with the first two bytes of the salt,
+# followed by 11 bytes from the set [./0-9A-Za-z], and only the first
+# eight characters mattered, but those are probably no more safe
+# bets, given alternative encryption/hashing schemes like MD5,
+# C2 (or higher) security schemes, and non-UNIX platforms.
+
+ok(substr(crypt("ab", "cd"), 2) ne substr(crypt("ab", "ce"), 2), "salt");
+
+ok(crypt("HI", "HO") eq crypt(v4040.4041, "HO"), "Unicode");