From 209a14eff23fd2f75b1e82288505b04a0596a110 Mon Sep 17 00:00:00 2001 From: rsiddharth Date: Sat, 29 Aug 2020 13:37:41 -0400 Subject: rename package enc -> hex * Makefile (fmt): fmt lib instead of enc * challenge/c01.go: Use lib instead of enc * challenge/c02.go: Use lib instead of enc * enc/b64.go -> lib/b64.go * enc/hex.go -> lib/hex.go * enc/xor.go -> lib/xor.go --- enc/b64.go | 24 ------------------------ enc/hex.go | 26 -------------------------- enc/xor.go | 22 ---------------------- 3 files changed, 72 deletions(-) delete mode 100644 enc/b64.go delete mode 100644 enc/hex.go delete mode 100644 enc/xor.go (limited to 'enc') diff --git a/enc/b64.go b/enc/b64.go deleted file mode 100644 index 4c251a2..0000000 --- a/enc/b64.go +++ /dev/null @@ -1,24 +0,0 @@ -// Copyright © 2020 rsiddharth -// SPDX-License-Identifier: ISC - -package enc - -const b64_table = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" - -func HexToBase64(hex string) string { - hb := []byte(hex) - - b64 := "" - for i := 0; i <= len(hb)-3; i = i + 3 { - a := (HexCharToDec(hb[i])<<8 | - HexCharToDec(hb[i+1])<<4 | - HexCharToDec(hb[i+2])) - b64 += encode(a >> 6) - b64 += encode(a & 0b111111) - } - return b64 -} - -func encode(b uint16) string { - return string(b64_table[b]) -} diff --git a/enc/hex.go b/enc/hex.go deleted file mode 100644 index a1b9b46..0000000 --- a/enc/hex.go +++ /dev/null @@ -1,26 +0,0 @@ -// Copyright © 2020 rsiddharth -// SPDX-License-Identifier: ISC - -package enc - -// Adapted from -// https://go.googlesource.com/go/+/refs/tags/go1.15/src/encoding/hex/hex.go#83 -func HexCharToDec(c byte) uint16 { - switch { - case '0' <= c && c <= '9': - return uint16(c - '0') - case 'a' <= c && c <= 'f': - return uint16(c - 'a' + 10) - } - return 0 -} - -func DecToHexChar(i uint16) byte { - switch { - case 0 <= i && i <= 9: - return byte(48 + i) - case 10 <= i && i <= 15: - return byte(97 + (i - 10)) - } - return 0 -} diff --git a/enc/xor.go b/enc/xor.go deleted file mode 100644 index fe412b2..0000000 --- a/enc/xor.go +++ /dev/null @@ -1,22 +0,0 @@ -// Copyright © 2020 rsiddharth -// SPDX-License-Identifier: ISC - -package enc - -func FixedXOR(a, b string) string { - cs := "" - if len(a) != len(b) { - return cs - } - - ab := []byte(a) - bb := []byte(b) - for i := 0; i < len(ab); i++ { - p := HexCharToDec(ab[i]) - q := HexCharToDec(bb[i]) - r := DecToHexChar(p ^ q) - - cs += string(r) - } - return cs -} -- cgit v1.2.3