From 701d1ab638b23c24877fc41824add66232446676 Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Thu, 2 Feb 2017 09:32:00 -0500 Subject: Updating server dependancies (#5249) --- .../minio/minio-go/request-signature-v4.go | 303 --------------------- 1 file changed, 303 deletions(-) delete mode 100644 vendor/github.com/minio/minio-go/request-signature-v4.go (limited to 'vendor/github.com/minio/minio-go/request-signature-v4.go') diff --git a/vendor/github.com/minio/minio-go/request-signature-v4.go b/vendor/github.com/minio/minio-go/request-signature-v4.go deleted file mode 100644 index 2be3808d6..000000000 --- a/vendor/github.com/minio/minio-go/request-signature-v4.go +++ /dev/null @@ -1,303 +0,0 @@ -/* - * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 Minio, Inc. - * - * 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 minio - -import ( - "bytes" - "encoding/hex" - "net/http" - "sort" - "strconv" - "strings" - "time" -) - -// Signature and API related constants. -const ( - signV4Algorithm = "AWS4-HMAC-SHA256" - iso8601DateFormat = "20060102T150405Z" - yyyymmdd = "20060102" -) - -/// -/// Excerpts from @lsegal - -/// https://github.com/aws/aws-sdk-js/issues/659#issuecomment-120477258. -/// -/// User-Agent: -/// -/// This is ignored from signing because signing this causes -/// problems with generating pre-signed URLs (that are executed -/// by other agents) or when customers pass requests through -/// proxies, which may modify the user-agent. -/// -/// Content-Length: -/// -/// This is ignored from signing because generating a pre-signed -/// URL should not provide a content-length constraint, -/// specifically when vending a S3 pre-signed PUT URL. The -/// corollary to this is that when sending regular requests -/// (non-pre-signed), the signature contains a checksum of the -/// body, which implicitly validates the payload length (since -/// changing the number of bytes would change the checksum) -/// and therefore this header is not valuable in the signature. -/// -/// Content-Type: -/// -/// Signing this header causes quite a number of problems in -/// browser environments, where browsers like to modify and -/// normalize the content-type header in different ways. There is -/// more information on this in https://goo.gl/2E9gyy. Avoiding -/// this field simplifies logic and reduces the possibility of -/// future bugs. -/// -/// Authorization: -/// -/// Is skipped for obvious reasons -/// -var ignoredHeaders = map[string]bool{ - "Authorization": true, - "Content-Type": true, - "Content-Length": true, - "User-Agent": true, -} - -// getSigningKey hmac seed to calculate final signature. -func getSigningKey(secret, loc string, t time.Time) []byte { - date := sumHMAC([]byte("AWS4"+secret), []byte(t.Format(yyyymmdd))) - location := sumHMAC(date, []byte(loc)) - service := sumHMAC(location, []byte("s3")) - signingKey := sumHMAC(service, []byte("aws4_request")) - return signingKey -} - -// getSignature final signature in hexadecimal form. -func getSignature(signingKey []byte, stringToSign string) string { - return hex.EncodeToString(sumHMAC(signingKey, []byte(stringToSign))) -} - -// getScope generate a string of a specific date, an AWS region, and a -// service. -func getScope(location string, t time.Time) string { - scope := strings.Join([]string{ - t.Format(yyyymmdd), - location, - "s3", - "aws4_request", - }, "/") - return scope -} - -// getCredential generate a credential string. -func getCredential(accessKeyID, location string, t time.Time) string { - scope := getScope(location, t) - return accessKeyID + "/" + scope -} - -// getHashedPayload get the hexadecimal value of the SHA256 hash of -// the request payload. -func getHashedPayload(req http.Request) string { - hashedPayload := req.Header.Get("X-Amz-Content-Sha256") - if hashedPayload == "" { - // Presign does not have a payload, use S3 recommended value. - hashedPayload = unsignedPayload - } - return hashedPayload -} - -// getCanonicalHeaders generate a list of request headers for -// signature. -func getCanonicalHeaders(req http.Request) string { - var headers []string - vals := make(map[string][]string) - for k, vv := range req.Header { - if _, ok := ignoredHeaders[http.CanonicalHeaderKey(k)]; ok { - continue // ignored header - } - headers = append(headers, strings.ToLower(k)) - vals[strings.ToLower(k)] = vv - } - headers = append(headers, "host") - sort.Strings(headers) - - var buf bytes.Buffer - // Save all the headers in canonical form
: newline - // separated for each header. - for _, k := range headers { - buf.WriteString(k) - buf.WriteByte(':') - switch { - case k == "host": - buf.WriteString(req.URL.Host) - fallthrough - default: - for idx, v := range vals[k] { - if idx > 0 { - buf.WriteByte(',') - } - buf.WriteString(v) - } - buf.WriteByte('\n') - } - } - return buf.String() -} - -// getSignedHeaders generate all signed request headers. -// i.e lexically sorted, semicolon-separated list of lowercase -// request header names. -func getSignedHeaders(req http.Request) string { - var headers []string - for k := range req.Header { - if _, ok := ignoredHeaders[http.CanonicalHeaderKey(k)]; ok { - continue // Ignored header found continue. - } - headers = append(headers, strings.ToLower(k)) - } - headers = append(headers, "host") - sort.Strings(headers) - return strings.Join(headers, ";") -} - -// getCanonicalRequest generate a canonical request of style. -// -// canonicalRequest = -// \n -// \n -// \n -// \n -// \n -// -func getCanonicalRequest(req http.Request) string { - req.URL.RawQuery = strings.Replace(req.URL.Query().Encode(), "+", "%20", -1) - canonicalRequest := strings.Join([]string{ - req.Method, - urlEncodePath(req.URL.Path), - req.URL.RawQuery, - getCanonicalHeaders(req), - getSignedHeaders(req), - getHashedPayload(req), - }, "\n") - return canonicalRequest -} - -// getStringToSign a string based on selected query values. -func getStringToSignV4(t time.Time, location, canonicalRequest string) string { - stringToSign := signV4Algorithm + "\n" + t.Format(iso8601DateFormat) + "\n" - stringToSign = stringToSign + getScope(location, t) + "\n" - stringToSign = stringToSign + hex.EncodeToString(sum256([]byte(canonicalRequest))) - return stringToSign -} - -// preSignV4 presign the request, in accordance with -// http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html. -func preSignV4(req http.Request, accessKeyID, secretAccessKey, location string, expires int64) *http.Request { - // Presign is not needed for anonymous credentials. - if accessKeyID == "" || secretAccessKey == "" { - return &req - } - - // Initial time. - t := time.Now().UTC() - - // Get credential string. - credential := getCredential(accessKeyID, location, t) - - // Get all signed headers. - signedHeaders := getSignedHeaders(req) - - // Set URL query. - query := req.URL.Query() - query.Set("X-Amz-Algorithm", signV4Algorithm) - query.Set("X-Amz-Date", t.Format(iso8601DateFormat)) - query.Set("X-Amz-Expires", strconv.FormatInt(expires, 10)) - query.Set("X-Amz-SignedHeaders", signedHeaders) - query.Set("X-Amz-Credential", credential) - req.URL.RawQuery = query.Encode() - - // Get canonical request. - canonicalRequest := getCanonicalRequest(req) - - // Get string to sign from canonical request. - stringToSign := getStringToSignV4(t, location, canonicalRequest) - - // Gext hmac signing key. - signingKey := getSigningKey(secretAccessKey, location, t) - - // Calculate signature. - signature := getSignature(signingKey, stringToSign) - - // Add signature header to RawQuery. - req.URL.RawQuery += "&X-Amz-Signature=" + signature - - return &req -} - -// postPresignSignatureV4 - presigned signature for PostPolicy -// requests. -func postPresignSignatureV4(policyBase64 string, t time.Time, secretAccessKey, location string) string { - // Get signining key. - signingkey := getSigningKey(secretAccessKey, location, t) - // Calculate signature. - signature := getSignature(signingkey, policyBase64) - return signature -} - -// signV4 sign the request before Do(), in accordance with -// http://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html. -func signV4(req http.Request, accessKeyID, secretAccessKey, location string) *http.Request { - // Signature calculation is not needed for anonymous credentials. - if accessKeyID == "" || secretAccessKey == "" { - return &req - } - - // Initial time. - t := time.Now().UTC() - - // Set x-amz-date. - req.Header.Set("X-Amz-Date", t.Format(iso8601DateFormat)) - - // Get canonical request. - canonicalRequest := getCanonicalRequest(req) - - // Get string to sign from canonical request. - stringToSign := getStringToSignV4(t, location, canonicalRequest) - - // Get hmac signing key. - signingKey := getSigningKey(secretAccessKey, location, t) - - // Get credential string. - credential := getCredential(accessKeyID, location, t) - - // Get all signed headers. - signedHeaders := getSignedHeaders(req) - - // Calculate signature. - signature := getSignature(signingKey, stringToSign) - - // If regular request, construct the final authorization header. - parts := []string{ - signV4Algorithm + " Credential=" + credential, - "SignedHeaders=" + signedHeaders, - "Signature=" + signature, - } - - // Set authorization header. - auth := strings.Join(parts, ", ") - req.Header.Set("Authorization", auth) - - return &req -} -- cgit v1.2.3-1-g7c22