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138 lines
4.8 KiB
138 lines
4.8 KiB
// Copyright 2019 Huawei Technologies Co.,Ltd.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
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// this file except in compliance with the License. You may obtain a copy of the
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// License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed
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// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations under the License.
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package obs
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import (
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"strings"
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"time"
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)
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func getV4StringToSign(method, canonicalizedURL, queryURL, scope, longDate, payload string, signedHeaders []string, headers map[string][]string) string {
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canonicalRequest := make([]string, 0, 10+len(signedHeaders)*4)
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canonicalRequest = append(canonicalRequest, method)
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canonicalRequest = append(canonicalRequest, "\n")
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canonicalRequest = append(canonicalRequest, canonicalizedURL)
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canonicalRequest = append(canonicalRequest, "\n")
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canonicalRequest = append(canonicalRequest, queryURL)
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canonicalRequest = append(canonicalRequest, "\n")
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for _, signedHeader := range signedHeaders {
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values, _ := headers[signedHeader]
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for _, value := range values {
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canonicalRequest = append(canonicalRequest, signedHeader)
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canonicalRequest = append(canonicalRequest, ":")
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canonicalRequest = append(canonicalRequest, value)
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canonicalRequest = append(canonicalRequest, "\n")
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}
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}
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canonicalRequest = append(canonicalRequest, "\n")
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canonicalRequest = append(canonicalRequest, strings.Join(signedHeaders, ";"))
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canonicalRequest = append(canonicalRequest, "\n")
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canonicalRequest = append(canonicalRequest, payload)
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_canonicalRequest := strings.Join(canonicalRequest, "")
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var isSecurityToken bool
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var securityToken []string
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if securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_OBS]; !isSecurityToken {
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securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_AMZ]
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}
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var query []string
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if !isSecurityToken {
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query = strings.Split(queryURL, "&")
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for _, value := range query {
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if strings.HasPrefix(value, HEADER_STS_TOKEN_AMZ+"=") || strings.HasPrefix(value, HEADER_STS_TOKEN_OBS+"=") {
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if value[len(HEADER_STS_TOKEN_AMZ)+1:] != "" {
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securityToken = []string{value[len(HEADER_STS_TOKEN_AMZ)+1:]}
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isSecurityToken = true
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}
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}
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}
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}
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logCanonicalRequest := _canonicalRequest
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if isSecurityToken && len(securityToken) > 0 {
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logCanonicalRequest = strings.Replace(logCanonicalRequest, securityToken[0], "******", -1)
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}
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doLog(LEVEL_DEBUG, "The v4 auth canonicalRequest:\n%s", logCanonicalRequest)
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stringToSign := make([]string, 0, 7)
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stringToSign = append(stringToSign, V4_HASH_PREFIX)
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stringToSign = append(stringToSign, "\n")
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stringToSign = append(stringToSign, longDate)
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stringToSign = append(stringToSign, "\n")
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stringToSign = append(stringToSign, scope)
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stringToSign = append(stringToSign, "\n")
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stringToSign = append(stringToSign, HexSha256([]byte(_canonicalRequest)))
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_stringToSign := strings.Join(stringToSign, "")
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doLog(LEVEL_DEBUG, "The v4 auth stringToSign:\n%s", _stringToSign)
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return _stringToSign
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}
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// V4Auth is a wrapper for v4Auth
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func V4Auth(ak, sk, region, method, canonicalizedURL, queryURL string, headers map[string][]string) map[string]string {
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return v4Auth(ak, sk, region, method, canonicalizedURL, queryURL, headers)
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}
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func v4Auth(ak, sk, region, method, canonicalizedURL, queryURL string, headers map[string][]string) map[string]string {
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var t time.Time
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if val, ok := headers[HEADER_DATE_AMZ]; ok {
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var err error
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t, err = time.Parse(LONG_DATE_FORMAT, val[0])
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if err != nil {
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t = time.Now().UTC()
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}
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} else if val, ok := headers[PARAM_DATE_AMZ_CAMEL]; ok {
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var err error
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t, err = time.Parse(LONG_DATE_FORMAT, val[0])
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if err != nil {
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t = time.Now().UTC()
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}
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} else if val, ok := headers[HEADER_DATE_CAMEL]; ok {
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var err error
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t, err = time.Parse(RFC1123_FORMAT, val[0])
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if err != nil {
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t = time.Now().UTC()
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}
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} else if val, ok := headers[strings.ToLower(HEADER_DATE_CAMEL)]; ok {
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var err error
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t, err = time.Parse(RFC1123_FORMAT, val[0])
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if err != nil {
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t = time.Now().UTC()
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}
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} else {
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t = time.Now().UTC()
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}
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shortDate := t.Format(SHORT_DATE_FORMAT)
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longDate := t.Format(LONG_DATE_FORMAT)
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signedHeaders, _headers := getSignedHeaders(headers)
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credential, scope := getCredential(ak, region, shortDate)
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payload := UNSIGNED_PAYLOAD
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if val, ok := headers[HEADER_CONTENT_SHA256_AMZ]; ok {
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payload = val[0]
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}
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stringToSign := getV4StringToSign(method, canonicalizedURL, queryURL, scope, longDate, payload, signedHeaders, _headers)
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signature := getSignature(stringToSign, sk, region, shortDate)
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ret := make(map[string]string, 3)
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ret["Credential"] = credential
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ret["SignedHeaders"] = strings.Join(signedHeaders, ";")
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ret["Signature"] = signature
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return ret
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}
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