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[feature] support aes-128 & aes-256 encryption (#668)
* support aes-128 & aes-256 encryption
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * Copyright 1999-2020 Alibaba Group Holding Ltd. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package encoding | ||
|
|
||
| import ( | ||
| "encoding/base64" | ||
| "unicode/utf8" | ||
| ) | ||
|
|
||
| func DecodeString2Utf8Bytes(data string) []byte { | ||
| resBytes := make([]byte, 0, 8) | ||
| if len(data) == 0 { | ||
| return resBytes | ||
| } | ||
| bytesLen := 0 | ||
| runes := []rune(data) | ||
| for _, r := range runes { | ||
| bytesLen += utf8.RuneLen(r) | ||
| } | ||
| resBytes = make([]byte, bytesLen) | ||
| pos := 0 | ||
| for _, r := range runes { | ||
| pos += utf8.EncodeRune(resBytes[pos:], r) | ||
| } | ||
| return resBytes | ||
| } | ||
|
|
||
| func EncodeUtf8Bytes2String(bytes []byte) string { | ||
| if len(bytes) == 0 { | ||
| return "" | ||
| } | ||
| var startPos, endPos int | ||
| resRunes := make([]rune, 0, 8) | ||
| for endPos <= len(bytes) { | ||
| if utf8.FullRune(bytes[startPos:endPos]) { | ||
| decodedRune, _ := utf8.DecodeRune(bytes[startPos:endPos]) | ||
| resRunes = append(resRunes, decodedRune) | ||
| startPos = endPos | ||
| } | ||
| endPos++ | ||
| } | ||
| return string(resRunes) | ||
| } | ||
|
|
||
| func DecodeBase64(bytes []byte) ([]byte, error) { | ||
| dst := make([]byte, base64.StdEncoding.DecodedLen(len(bytes))) | ||
| n, err := base64.StdEncoding.Decode(dst, bytes) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return dst[:n], nil | ||
| } | ||
|
|
||
| func EncodeBase64(bytes []byte) ([]byte, error) { | ||
| dst := make([]byte, base64.StdEncoding.EncodedLen(len(bytes))) | ||
| base64.StdEncoding.Encode(dst, bytes) | ||
| return dst[:], nil | ||
| } |
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