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authorTilo Spannagel <development@tilosp.de>2020-08-30 14:01:52 +0200
committerGitHub <noreply@github.com>2020-08-30 14:01:52 +0200
commitf9928c9e259fefee5bd049dbc8d8e5d98107f136 (patch)
treea593a2376ca4debdecb31b431e9d3928383d89e6 /vendor/github.com/matterbridge/gomatrix/userids.go
parenta0741d99b80d7da1c063853382756b3a9689f6a7 (diff)
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Switch to upstream gomatrix (#1219)
Signed-off-by: Tilo Spannagel <development@tilosp.de>
Diffstat (limited to 'vendor/github.com/matterbridge/gomatrix/userids.go')
-rw-r--r--vendor/github.com/matterbridge/gomatrix/userids.go130
1 files changed, 0 insertions, 130 deletions
diff --git a/vendor/github.com/matterbridge/gomatrix/userids.go b/vendor/github.com/matterbridge/gomatrix/userids.go
deleted file mode 100644
index 70002c5b..00000000
--- a/vendor/github.com/matterbridge/gomatrix/userids.go
+++ /dev/null
@@ -1,130 +0,0 @@
-package gomatrix
-
-import (
- "bytes"
- "encoding/hex"
- "fmt"
- "strings"
-)
-
-const lowerhex = "0123456789abcdef"
-
-// encode the given byte using quoted-printable encoding (e.g "=2f")
-// and writes it to the buffer
-// See https://golang.org/src/mime/quotedprintable/writer.go
-func encode(buf *bytes.Buffer, b byte) {
- buf.WriteByte('=')
- buf.WriteByte(lowerhex[b>>4])
- buf.WriteByte(lowerhex[b&0x0f])
-}
-
-// escape the given alpha character and writes it to the buffer
-func escape(buf *bytes.Buffer, b byte) {
- buf.WriteByte('_')
- if b == '_' {
- buf.WriteByte('_') // another _
- } else {
- buf.WriteByte(b + 0x20) // ASCII shift A-Z to a-z
- }
-}
-
-func shouldEncode(b byte) bool {
- return b != '-' && b != '.' && b != '_' && !(b >= '0' && b <= '9') && !(b >= 'a' && b <= 'z') && !(b >= 'A' && b <= 'Z')
-}
-
-func shouldEscape(b byte) bool {
- return (b >= 'A' && b <= 'Z') || b == '_'
-}
-
-func isValidByte(b byte) bool {
- return isValidEscapedChar(b) || (b >= '0' && b <= '9') || b == '.' || b == '=' || b == '-'
-}
-
-func isValidEscapedChar(b byte) bool {
- return b == '_' || (b >= 'a' && b <= 'z')
-}
-
-// EncodeUserLocalpart encodes the given string into Matrix-compliant user ID localpart form.
-// See http://matrix.org/docs/spec/intro.html#mapping-from-other-character-sets
-//
-// This returns a string with only the characters "a-z0-9._=-". The uppercase range A-Z
-// are encoded using leading underscores ("_"). Characters outside the aforementioned ranges
-// (including literal underscores ("_") and equals ("=")) are encoded as UTF8 code points (NOT NCRs)
-// and converted to lower-case hex with a leading "=". For example:
-// Alph@Bet_50up => _alph=40_bet=5f50up
-func EncodeUserLocalpart(str string) string {
- strBytes := []byte(str)
- var outputBuffer bytes.Buffer
- for _, b := range strBytes {
- if shouldEncode(b) {
- encode(&outputBuffer, b)
- } else if shouldEscape(b) {
- escape(&outputBuffer, b)
- } else {
- outputBuffer.WriteByte(b)
- }
- }
- return outputBuffer.String()
-}
-
-// DecodeUserLocalpart decodes the given string back into the original input string.
-// Returns an error if the given string is not a valid user ID localpart encoding.
-// See http://matrix.org/docs/spec/intro.html#mapping-from-other-character-sets
-//
-// This decodes quoted-printable bytes back into UTF8, and unescapes casing. For
-// example:
-// _alph=40_bet=5f50up => Alph@Bet_50up
-// Returns an error if the input string contains characters outside the
-// range "a-z0-9._=-", has an invalid quote-printable byte (e.g. not hex), or has
-// an invalid _ escaped byte (e.g. "_5").
-func DecodeUserLocalpart(str string) (string, error) {
- strBytes := []byte(str)
- var outputBuffer bytes.Buffer
- for i := 0; i < len(strBytes); i++ {
- b := strBytes[i]
- if !isValidByte(b) {
- return "", fmt.Errorf("Byte pos %d: Invalid byte", i)
- }
-
- if b == '_' { // next byte is a-z and should be upper-case or is another _ and should be a literal _
- if i+1 >= len(strBytes) {
- return "", fmt.Errorf("Byte pos %d: expected _[a-z_] encoding but ran out of string", i)
- }
- if !isValidEscapedChar(strBytes[i+1]) { // invalid escaping
- return "", fmt.Errorf("Byte pos %d: expected _[a-z_] encoding", i)
- }
- if strBytes[i+1] == '_' {
- outputBuffer.WriteByte('_')
- } else {
- outputBuffer.WriteByte(strBytes[i+1] - 0x20) // ASCII shift a-z to A-Z
- }
- i++ // skip next byte since we just handled it
- } else if b == '=' { // next 2 bytes are hex and should be buffered ready to be read as utf8
- if i+2 >= len(strBytes) {
- return "", fmt.Errorf("Byte pos: %d: expected quote-printable encoding but ran out of string", i)
- }
- dst := make([]byte, 1)
- _, err := hex.Decode(dst, strBytes[i+1:i+3])
- if err != nil {
- return "", err
- }
- outputBuffer.WriteByte(dst[0])
- i += 2 // skip next 2 bytes since we just handled it
- } else { // pass through
- outputBuffer.WriteByte(b)
- }
- }
- return outputBuffer.String(), nil
-}
-
-// ExtractUserLocalpart extracts the localpart portion of a user ID.
-// See http://matrix.org/docs/spec/intro.html#user-identifiers
-func ExtractUserLocalpart(userID string) (string, error) {
- if len(userID) == 0 || userID[0] != '@' {
- return "", fmt.Errorf("%s is not a valid user id", userID)
- }
- return strings.TrimPrefix(
- strings.SplitN(userID, ":", 2)[0], // @foo:bar:8448 => [ "@foo", "bar:8448" ]
- "@", // remove "@" prefix
- ), nil
-}