closes #2496 and #2552

Update Azure SDK with release v16.2.1
Update Azure autorest SDK with release v10.8.1

Signed-off-by: Yu Wang <yuwa@microsoft.com>

vendor/github.com/Azure/azure-sdk-for-go/storage/blobsasuri.go

@@ -0,0 +1,174 @@
+package storage
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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.
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"strings"
+	"time"
+)
+
+// OverrideHeaders defines overridable response heaedrs in
+// a request using a SAS URI.
+// See https://docs.microsoft.com/en-us/rest/api/storageservices/constructing-a-service-sas
+type OverrideHeaders struct {
+	CacheControl       string
+	ContentDisposition string
+	ContentEncoding    string
+	ContentLanguage    string
+	ContentType        string
+}
+
+// BlobSASOptions are options to construct a blob SAS
+// URI.
+// See https://docs.microsoft.com/en-us/rest/api/storageservices/constructing-a-service-sas
+type BlobSASOptions struct {
+	BlobServiceSASPermissions
+	OverrideHeaders
+	SASOptions
+}
+
+// BlobServiceSASPermissions includes the available permissions for
+// blob service SAS URI.
+type BlobServiceSASPermissions struct {
+	Read   bool
+	Add    bool
+	Create bool
+	Write  bool
+	Delete bool
+}
+
+func (p BlobServiceSASPermissions) buildString() string {
+	permissions := ""
+	if p.Read {
+		permissions += "r"
+	}
+	if p.Add {
+		permissions += "a"
+	}
+	if p.Create {
+		permissions += "c"
+	}
+	if p.Write {
+		permissions += "w"
+	}
+	if p.Delete {
+		permissions += "d"
+	}
+	return permissions
+}
+
+// GetSASURI creates an URL to the blob which contains the Shared
+// Access Signature with the specified options.
+//
+// See https://docs.microsoft.com/en-us/rest/api/storageservices/constructing-a-service-sas
+func (b *Blob) GetSASURI(options BlobSASOptions) (string, error) {
+	uri := b.GetURL()
+	signedResource := "b"
+	canonicalizedResource, err := b.Container.bsc.client.buildCanonicalizedResource(uri, b.Container.bsc.auth, true)
+	if err != nil {
+		return "", err
+	}
+
+	permissions := options.BlobServiceSASPermissions.buildString()
+	return b.Container.bsc.client.blobAndFileSASURI(options.SASOptions, uri, permissions, canonicalizedResource, signedResource, options.OverrideHeaders)
+}
+
+func (c *Client) blobAndFileSASURI(options SASOptions, uri, permissions, canonicalizedResource, signedResource string, headers OverrideHeaders) (string, error) {
+	start := ""
+	if options.Start != (time.Time{}) {
+		start = options.Start.UTC().Format(time.RFC3339)
+	}
+
+	expiry := options.Expiry.UTC().Format(time.RFC3339)
+
+	// We need to replace + with %2b first to avoid being treated as a space (which is correct for query strings, but not the path component).
+	canonicalizedResource = strings.Replace(canonicalizedResource, "+", "%2b", -1)
+	canonicalizedResource, err := url.QueryUnescape(canonicalizedResource)
+	if err != nil {
+		return "", err
+	}
+
+	protocols := ""
+	if options.UseHTTPS {
+		protocols = "https"
+	}
+	stringToSign, err := blobSASStringToSign(permissions, start, expiry, canonicalizedResource, options.Identifier, options.IP, protocols, c.apiVersion, headers)
+	if err != nil {
+		return "", err
+	}
+
+	sig := c.computeHmac256(stringToSign)
+	sasParams := url.Values{
+		"sv":  {c.apiVersion},
+		"se":  {expiry},
+		"sr":  {signedResource},
+		"sp":  {permissions},
+		"sig": {sig},
+	}
+
+	if start != "" {
+		sasParams.Add("st", start)
+	}
+
+	if c.apiVersion >= "2015-04-05" {
+		if protocols != "" {
+			sasParams.Add("spr", protocols)
+		}
+		if options.IP != "" {
+			sasParams.Add("sip", options.IP)
+		}
+	}
+
+	// Add override response hedaers
+	addQueryParameter(sasParams, "rscc", headers.CacheControl)
+	addQueryParameter(sasParams, "rscd", headers.ContentDisposition)
+	addQueryParameter(sasParams, "rsce", headers.ContentEncoding)
+	addQueryParameter(sasParams, "rscl", headers.ContentLanguage)
+	addQueryParameter(sasParams, "rsct", headers.ContentType)
+
+	sasURL, err := url.Parse(uri)
+	if err != nil {
+		return "", err
+	}
+	sasURL.RawQuery = sasParams.Encode()
+	return sasURL.String(), nil
+}
+
+func blobSASStringToSign(signedPermissions, signedStart, signedExpiry, canonicalizedResource, signedIdentifier, signedIP, protocols, signedVersion string, headers OverrideHeaders) (string, error) {
+	rscc := headers.CacheControl
+	rscd := headers.ContentDisposition
+	rsce := headers.ContentEncoding
+	rscl := headers.ContentLanguage
+	rsct := headers.ContentType
+
+	if signedVersion >= "2015-02-21" {
+		canonicalizedResource = "/blob" + canonicalizedResource
+	}
+
+	// https://msdn.microsoft.com/en-us/library/azure/dn140255.aspx#Anchor_12
+	if signedVersion >= "2015-04-05" {
+		return fmt.Sprintf("%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s", signedPermissions, signedStart, signedExpiry, canonicalizedResource, signedIdentifier, signedIP, protocols, signedVersion, rscc, rscd, rsce, rscl, rsct), nil
+	}
+
+	// reference: http://msdn.microsoft.com/en-us/library/azure/dn140255.aspx
+	if signedVersion >= "2013-08-15" {
+		return fmt.Sprintf("%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s", signedPermissions, signedStart, signedExpiry, canonicalizedResource, signedIdentifier, signedVersion, rscc, rscd, rsce, rscl, rsct), nil
+	}
+
+	return "", errors.New("storage: not implemented SAS for versions earlier than 2013-08-15")
+}