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author | Kali Kaneko (leap communications) <kali@leap.se> | 2019-08-08 00:19:33 +0200 |
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committer | Kali Kaneko (leap communications) <kali@leap.se> | 2019-08-08 00:19:33 +0200 |
commit | fde18e485ff7cbc7b2e33dade8e81136f06a5b60 (patch) | |
tree | 79a6dbd13e7e4a46e708a70104c548f403b477ae /vendor/github.com/getlantern/hidden/hidden.go | |
parent | 93e1de570f47b095905835735dbd67479aa0c2de (diff) |
[pkg] remove vendor
Diffstat (limited to 'vendor/github.com/getlantern/hidden/hidden.go')
-rw-r--r-- | vendor/github.com/getlantern/hidden/hidden.go | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/vendor/github.com/getlantern/hidden/hidden.go b/vendor/github.com/getlantern/hidden/hidden.go deleted file mode 100644 index 0c52b08..0000000 --- a/vendor/github.com/getlantern/hidden/hidden.go +++ /dev/null @@ -1,66 +0,0 @@ -// Package hidden provides the ability to "hide" binary data in a string using -// a hex encoding with non-printing characters. Hidden data is demarcated with -// a leading and trailing NUL character. -package hidden - -import ( - "bytes" - "fmt" - "regexp" - - "github.com/getlantern/hex" -) - -// 16 non-printing characters -const hextable = "\x01\x02\x03\x04\x05\x06\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17" - -var ( - hexencoding = hex.NewEncoding(hextable) - - re *regexp.Regexp -) - -func init() { - var err error - re, err = regexp.Compile(fmt.Sprintf("\x00[%v]+\x00", hextable)) - if err != nil { - panic(err) - } -} - -// ToString encodes the given data as a hidden string, including leadnig and -// trailing NULs. -func ToString(data []byte) string { - buf := bytes.NewBuffer(make([]byte, 0, 2+hex.EncodedLen(len(data)))) - // Leading NUL - buf.WriteByte(0) - buf.WriteString(hexencoding.EncodeToString(data)) - // Trailing NUL - buf.WriteByte(0) - return buf.String() -} - -// FromString extracts the hidden data from a string, which is expected to -// contain leading and trailing NULs. -func FromString(str string) ([]byte, error) { - return hexencoding.DecodeString(str[1 : len(str)-1]) -} - -// Extract extracts all hidden data from an arbitrary string. -func Extract(str string) ([][]byte, error) { - m := re.FindAllString(str, -1) - result := make([][]byte, 0, len(m)) - for _, s := range m { - b, err := FromString(s) - if err != nil { - return nil, err - } - result = append(result, b) - } - return result, nil -} - -// Clean removes any hidden data from an arbitrary string. -func Clean(str string) string { - return re.ReplaceAllString(str, "") -} |