mirror of https://github.com/octoleo/restic.git
60 lines
1.8 KiB
Go
60 lines
1.8 KiB
Go
/*
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* MinIO Go Library for Amazon S3 Compatible Cloud Storage
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* Copyright 2015-2017 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the 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
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package s3signer
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import (
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"crypto/hmac"
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"net/http"
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"strings"
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"github.com/minio/sha256-simd"
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)
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// unsignedPayload - value to be set to X-Amz-Content-Sha256 header when
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const unsignedPayload = "UNSIGNED-PAYLOAD"
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// sum256 calculate sha256 sum for an input byte array.
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func sum256(data []byte) []byte {
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hash := sha256.New()
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hash.Write(data)
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return hash.Sum(nil)
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}
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// sumHMAC calculate hmac between two input byte array.
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func sumHMAC(key []byte, data []byte) []byte {
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hash := hmac.New(sha256.New, key)
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hash.Write(data)
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return hash.Sum(nil)
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}
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// getHostAddr returns host header if available, otherwise returns host from URL
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func getHostAddr(req *http.Request) string {
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if req.Host != "" {
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return req.Host
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}
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return req.URL.Host
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}
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// Trim leading and trailing spaces and replace sequential spaces with one space, following Trimall()
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// in http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
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func signV4TrimAll(input string) string {
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// Compress adjacent spaces (a space is determined by
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// unicode.IsSpace() internally here) to one space and return
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return strings.Join(strings.Fields(input), " ")
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}
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