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

3 files changed, 0 insertions, 72 deletions

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 <s@ricketyspace.net>
-// 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 <s@ricketyspace.net>
-// 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 <s@ricketyspace.net>
-// 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
-}