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Make base32 encodings case preserving.

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This commit is contained in:
Kevin Atkinson
2017-08-28 17:38:04 -04:00
parent 5e86107a34
commit 8d1441db4b
2 changed files with 49 additions and 19 deletions
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50
multibase.go
View File

@@ -51,14 +51,22 @@ func Encode(base Encoding, data []byte) (string, error) {
return string(Identity) + string(data), nil
case Base16, Base16Upper:
return string(Base16) + hex.EncodeToString(data), nil
case Base32, Base32Upper:
return string(Base32) + b32.RawStdEncoding.EncodeToString(data), nil
case Base32hex, Base32hexUpper:
return string(Base32hex) + b32.RawHexEncoding.EncodeToString(data), nil
case Base32pad, Base32padUpper:
return string(Base32pad) + b32.StdEncoding.EncodeToString(data), nil
case Base32hexPad, Base32hexPadUpper:
return string(Base32hexPad) + b32.HexEncoding.EncodeToString(data), nil
case Base32:
return string(Base32) + base32StdLowerNoPad.EncodeToString(data), nil
case Base32Upper:
return string(Base32Upper) + base32StdUpperNoPad.EncodeToString(data), nil
case Base32hex:
return string(Base32hex) + base32HexLowerNoPad.EncodeToString(data), nil
case Base32hexUpper:
return string(Base32hexUpper) + base32HexUpperNoPad.EncodeToString(data), nil
case Base32pad:
return string(Base32pad) + base32StdLowerPad.EncodeToString(data), nil
case Base32padUpper:
return string(Base32padUpper) + base32StdUpperPad.EncodeToString(data), nil
case Base32hexPad:
return string(Base32hexPad) + base32HexLowerPad.EncodeToString(data), nil
case Base32hexPadUpper:
return string(Base32hexPadUpper) + base32HexUpperPad.EncodeToString(data), nil
case Base58BTC:
return string(Base58BTC) + b58.EncodeAlphabet(data, b58.BTCAlphabet), nil
case Base58Flickr:
@@ -83,24 +91,26 @@ func Decode(data string) (Encoding, []byte, error) {
return 0, nil, fmt.Errorf("cannot decode multibase for zero length string")
}
switch data[0] {
enc := Encoding(data[0])
switch enc {
case Identity:
return Identity, []byte(data[1:]), nil
case Base16, Base16Upper:
bytes, err := hex.DecodeString(data[1:])
return Base16, bytes, err
return enc, bytes, err
case Base32, Base32Upper:
bytes, err := b32.RawStdEncoding.DecodeString(data[1:])
return Base32, bytes, err
return enc, bytes, err
case Base32hex, Base32hexUpper:
bytes, err := b32.RawHexEncoding.DecodeString(data[1:])
return Base32hex, bytes, err
return enc, bytes, err
case Base32pad, Base32padUpper:
bytes, err := b32.StdEncoding.DecodeString(data[1:])
return Base32pad, bytes, err
return enc, bytes, err
case Base32hexPad, Base32hexPadUpper:
bytes, err := b32.HexEncoding.DecodeString(data[1:])
return Base32hexPad, bytes, err
return enc, bytes, err
case Base58BTC:
return Base58BTC, b58.DecodeAlphabet(data[1:], b58.BTCAlphabet), nil
case Base58Flickr:
@@ -121,3 +131,15 @@ func Decode(data string) (Encoding, []byte, error) {
return -1, nil, ErrUnsupportedEncoding
}
}
var base32StdLowerPad = b32.NewEncodingCI("abcdefghijklmnopqrstuvwxyz234567")
var base32StdLowerNoPad = base32StdLowerPad.WithPadding(b32.NoPadding)
var base32StdUpperPad = b32.NewEncodingCI("ABCDEFGHIJKLMNOPQRSTUVWXYZ234567")
var base32StdUpperNoPad = base32StdUpperPad.WithPadding(b32.NoPadding)
var base32HexLowerPad = b32.NewEncodingCI("0123456789abcdefghijklmnopqrstuv")
var base32HexLowerNoPad = base32HexLowerPad.WithPadding(b32.NoPadding)
var base32HexUpperPad = b32.NewEncodingCI("0123456789ABCDEFGHIJKLMNOPQRSTUV")
var base32HexUpperNoPad = base32HexUpperPad.WithPadding(b32.NoPadding)

18
multibase_test.go
View File

@@ -8,11 +8,19 @@ import (
var sampleBytes = []byte("Decentralize everything!!")
var encodedSamples = map[Encoding]string{
Identity: string(0x00) + "Decentralize everything!!",
Base16: "f446563656e7472616c697a652065766572797468696e672121",
Base58BTC: "zUXE7GvtEk8XTXs1GF8HSGbVA9FCX9SEBPe",
Base64pad: "MRGVjZW50cmFsaXplIGV2ZXJ5dGhpbmchIQ==",
Base64urlPad: "URGVjZW50cmFsaXplIGV2ZXJ5dGhpbmchIQ==",
Identity: string(0x00) + "Decentralize everything!!",
Base16: "f446563656e7472616c697a652065766572797468696e672121",
Base32: "birswgzloorzgc3djpjssazlwmvzhs5dinfxgoijb",
Base32Upper: "BIRSWGZLOORZGC3DJPJSSAZLWMVZHS5DINFXGOIJB",
Base32pad: "cirswgzloorzgc3djpjssazlwmvzhs5dinfxgoijb",
Base32padUpper: "CIRSWGZLOORZGC3DJPJSSAZLWMVZHS5DINFXGOIJB",
Base32hex: "v8him6pbeehp62r39f9ii0pbmclp7it38d5n6e891",
Base32hexUpper: "V8HIM6PBEEHP62R39F9II0PBMCLP7IT38D5N6E891",
Base32hexPad: "t8him6pbeehp62r39f9ii0pbmclp7it38d5n6e891",
Base32hexPadUpper: "T8HIM6PBEEHP62R39F9II0PBMCLP7IT38D5N6E891",
Base58BTC: "zUXE7GvtEk8XTXs1GF8HSGbVA9FCX9SEBPe",
Base64pad: "MRGVjZW50cmFsaXplIGV2ZXJ5dGhpbmchIQ==",
Base64urlPad: "URGVjZW50cmFsaXplIGV2ZXJ5dGhpbmchIQ==",
}
func testEncode(t *testing.T, encoding Encoding, bytes []byte, expected string) {