1 files changed, 98 insertions, 0 deletions
diff --git a/jp-hash.js b/jp-hash.js
new file mode 100755
index 0000000..12d7673
--- /dev/null
+++ b/jp-hash.js
@@ -0,0 +1,98 @@
+#!/usr/bin/env node
+
+// One-Clause BSD License ("1BSD")
+//
+// Copyright 2022  Kaz Kylheku <kaz@kylheku.com>
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following condition is
+// met:
+//
+// 1. The source code distribution retains the above copyright notice,
+//    this condition, and the following disclaimer.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+const mora = [
+ "a", "i", "u", "e", "o", "ya", "yu", "yo", "wa",
+ "ka", "ki", "ku", "ke", "ko", "ga", "gi", "gu", "ge", "go",
+ "sa", "shi", "su", "se", "so", "za", "ji", "zu", "ze", "zo",
+ "ta", "chi", "tsu", "te", "to", "da", "de", "do",
+ "na", "ni", "nu", "ne", "no", "ha", "hi", "fu", "he", "ho",
+ "pa", "pi", "pu", "pe", "po", "ba", "bi", "bu", "be", "bo",
+ "ma", "mi", "mu", "me", "mo", "ra", "ri", "ru", "re", "ro",
+ "kya", "kyu", "kyo", "gya", "gyu", "gyo", "sha", "shu", "sho",
+ "ja", "ju", "jo", "cha", "chu", "cho", "nya", "nyu", "nyo",
+ "hya", "hyu", "hyo", "pya", "pyu", "pyo", "bya", "byu", "byo",
+ "mya", "myu", "myo", "rya", "ryu", "ryo"
+];
+
+const digit = [
+  "0", "1", "2", "3", "4",
+  "5", "6", "7", "8", "9"
+];
+
+const symbol = [
+  "!", "#", "@", "$", "%",
+  "^", "&", "*", "?", "/"
+];
+
+const crypto = require('crypto');
+
+function jp_hash(input)
+{
+  const hash = crypto.createHash('sha256').update(input).digest();
+  let word = [];
+  let ms = [];
+
+  for (let i = 0; i < 9; i++)
+    word[i] = hash.readUInt16LE(2*i);
+
+  for (i = 0; i < 6; i++)
+    ms[i] = mora[word[i] % mora.length];
+
+  const dig = digit[word[6] % digit.length];
+  const sym = symbol[word[7] % symbol.length];
+
+  ms[0] = ms[0][0].toUpperCase() + ms[0].slice(1);
+
+  switch (word[8] & 7) {
+  case 0:
+    return [ms[0], ms[1], ms[2], sym, ms[3], ms[4], ms[5], dig].join('');
+  case 1:
+    return [sym, ms[0], ms[1], ms[2], dig, ms[3], ms[4], ms[5]].join('');
+  case 2:
+    return [ms[0], ms[1], sym, ms[2], ms[3], dig, ms[4], ms[5]].join('');
+  case 3:
+    return [ms[0], ms[1], dig, ms[2], ms[3], sym, ms[4], ms[5]].join('');
+  case 4:
+    return [ms[0], ms[1], ms[2], "n", sym, ms[3], ms[4], ms[5], dig].join('');
+  case 5:
+    return [sym, ms[0], ms[1], ms[2], dig, ms[3], ms[4], ms[5], "n"].join('');
+  case 6:
+    return [ms[0], ms[1], "n", sym, ms[2], ms[3], dig, ms[4], ms[5]].join('');
+  case 7:
+    return [ms[0], ms[1], dig, ms[2], ms[3], sym, ms[4], ms[5], "n"].join('');
+  }
+}
+
+const myname = process.argv[1];
+const args = process.argv.slice(2);
+
+if (args.length != 1) {
+   console.log(myname, ": ", "one argument required");
+   process.exit(1);
+}
+
+console.log(jp_hash(args[0]));