diff --git a/vendor/github.com/aws/aws-sdk-go/private/signer/v4/header_rules.go b/vendor/github.com/aws/aws-sdk-go/private/signer/v4/header_rules.go
new file mode 100644
index 000000000..244c86da0
--- /dev/null
+++ b/vendor/github.com/aws/aws-sdk-go/private/signer/v4/header_rules.go
@@ -0,0 +1,82 @@
+package v4
+
+import (
+	"net/http"
+	"strings"
+)
+
+// validator houses a set of rule needed for validation of a
+// string value
+type rules []rule
+
+// rule interface allows for more flexible rules and just simply
+// checks whether or not a value adheres to that rule
+type rule interface {
+	IsValid(value string) bool
+}
+
+// IsValid will iterate through all rules and see if any rules
+// apply to the value and supports nested rules
+func (r rules) IsValid(value string) bool {
+	for _, rule := range r {
+		if rule.IsValid(value) {
+			return true
+		}
+	}
+	return false
+}
+
+// mapRule generic rule for maps
+type mapRule map[string]struct{}
+
+// IsValid for the map rule satisfies whether it exists in the map
+func (m mapRule) IsValid(value string) bool {
+	_, ok := m[value]
+	return ok
+}
+
+// whitelist is a generic rule for whitelisting
+type whitelist struct {
+	rule
+}
+
+// IsValid for whitelist checks if the value is within the whitelist
+func (w whitelist) IsValid(value string) bool {
+	return w.rule.IsValid(value)
+}
+
+// blacklist is a generic rule for blacklisting
+type blacklist struct {
+	rule
+}
+
+// IsValid for whitelist checks if the value is within the whitelist
+func (b blacklist) IsValid(value string) bool {
+	return !b.rule.IsValid(value)
+}
+
+type patterns []string
+
+// IsValid for patterns checks each pattern and returns if a match has
+// been found
+func (p patterns) IsValid(value string) bool {
+	for _, pattern := range p {
+		if strings.HasPrefix(http.CanonicalHeaderKey(value), pattern) {
+			return true
+		}
+	}
+	return false
+}
+
+// inclusiveRules rules allow for rules to depend on one another
+type inclusiveRules []rule
+
+// IsValid will return true if all rules are true
+func (r inclusiveRules) IsValid(value string) bool {
+	for _, rule := range r {
+		if !rule.IsValid(value) {
+			return false
+		}
+	}
+	return true
+}
diff --git a/vendor/github.com/aws/aws-sdk-go/private/signer/v4/v4.go b/vendor/github.com/aws/aws-sdk-go/private/signer/v4/v4.go
new file mode 100644
index 000000000..14b0c6616
--- /dev/null
+++ b/vendor/github.com/aws/aws-sdk-go/private/signer/v4/v4.go
@@ -0,0 +1,438 @@
+// Package v4 implements signing for AWS V4 signer
+package v4
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/private/protocol/rest"
+)
+
+const (
+	authHeaderPrefix = "AWS4-HMAC-SHA256"
+	timeFormat       = "20060102T150405Z"
+	shortTimeFormat  = "20060102"
+)
+
+var ignoredHeaders = rules{
+	blacklist{
+		mapRule{
+			"Content-Length": struct{}{},
+			"User-Agent":     struct{}{},
+		},
+	},
+}
+
+// requiredSignedHeaders is a whitelist for build canonical headers.
+var requiredSignedHeaders = rules{
+	whitelist{
+		mapRule{
+			"Cache-Control":                                               struct{}{},
+			"Content-Disposition":                                         struct{}{},
+			"Content-Encoding":                                            struct{}{},
+			"Content-Language":                                            struct{}{},
+			"Content-Md5":                                                 struct{}{},
+			"Content-Type":                                                struct{}{},
+			"Expires":                                                     struct{}{},
+			"If-Match":                                                    struct{}{},
+			"If-Modified-Since":                                           struct{}{},
+			"If-None-Match":                                               struct{}{},
+			"If-Unmodified-Since":                                         struct{}{},
+			"Range":                                                       struct{}{},
+			"X-Amz-Acl":                                                   struct{}{},
+			"X-Amz-Copy-Source":                                           struct{}{},
+			"X-Amz-Copy-Source-If-Match":                                  struct{}{},
+			"X-Amz-Copy-Source-If-Modified-Since":                         struct{}{},
+			"X-Amz-Copy-Source-If-None-Match":                             struct{}{},
+			"X-Amz-Copy-Source-If-Unmodified-Since":                       struct{}{},
+			"X-Amz-Copy-Source-Range":                                     struct{}{},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": struct{}{},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       struct{}{},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   struct{}{},
+			"X-Amz-Grant-Full-control":                                    struct{}{},
+			"X-Amz-Grant-Read":                                            struct{}{},
+			"X-Amz-Grant-Read-Acp":                                        struct{}{},
+			"X-Amz-Grant-Write":                                           struct{}{},
+			"X-Amz-Grant-Write-Acp":                                       struct{}{},
+			"X-Amz-Metadata-Directive":                                    struct{}{},
+			"X-Amz-Mfa":                                                   struct{}{},
+			"X-Amz-Request-Payer":                                         struct{}{},
+			"X-Amz-Server-Side-Encryption":                                struct{}{},
+			"X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id":                 struct{}{},
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm":             struct{}{},
+			"X-Amz-Server-Side-Encryption-Customer-Key":                   struct{}{},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":               struct{}{},
+			"X-Amz-Storage-Class":                                         struct{}{},
+			"X-Amz-Website-Redirect-Location":                             struct{}{},
+		},
+	},
+	patterns{"X-Amz-Meta-"},
+}
+
+// allowedHoisting is a whitelist for build query headers. The boolean value
+// represents whether or not it is a pattern.
+var allowedQueryHoisting = inclusiveRules{
+	blacklist{requiredSignedHeaders},
+	patterns{"X-Amz-"},
+}
+
+type signer struct {
+	Request     *http.Request
+	Time        time.Time
+	ExpireTime  time.Duration
+	ServiceName string
+	Region      string
+	CredValues  credentials.Value
+	Credentials *credentials.Credentials
+	Query       url.Values
+	Body        io.ReadSeeker
+	Debug       aws.LogLevelType
+	Logger      aws.Logger
+
+	isPresign          bool
+	formattedTime      string
+	formattedShortTime string
+
+	signedHeaders    string
+	canonicalHeaders string
+	canonicalString  string
+	credentialString string
+	stringToSign     string
+	signature        string
+	authorization    string
+	notHoist         bool
+	signedHeaderVals http.Header
+}
+
+// Sign requests with signature version 4.
+//
+// Will sign the requests with the service config's Credentials object
+// Signing is skipped if the credentials is the credentials.AnonymousCredentials
+// object.
+func Sign(req *request.Request) {
+	// If the request does not need to be signed ignore the signing of the
+	// request if the AnonymousCredentials object is used.
+	if req.Config.Credentials == credentials.AnonymousCredentials {
+		return
+	}
+
+	region := req.ClientInfo.SigningRegion
+	if region == "" {
+		region = aws.StringValue(req.Config.Region)
+	}
+
+	name := req.ClientInfo.SigningName
+	if name == "" {
+		name = req.ClientInfo.ServiceName
+	}
+
+	s := signer{
+		Request:     req.HTTPRequest,
+		Time:        req.Time,
+		ExpireTime:  req.ExpireTime,
+		Query:       req.HTTPRequest.URL.Query(),
+		Body:        req.Body,
+		ServiceName: name,
+		Region:      region,
+		Credentials: req.Config.Credentials,
+		Debug:       req.Config.LogLevel.Value(),
+		Logger:      req.Config.Logger,
+		notHoist:    req.NotHoist,
+	}
+
+	req.Error = s.sign()
+	req.SignedHeaderVals = s.signedHeaderVals
+}
+
+func (v4 *signer) sign() error {
+	if v4.ExpireTime != 0 {
+		v4.isPresign = true
+	}
+
+	if v4.isRequestSigned() {
+		if !v4.Credentials.IsExpired() {
+			// If the request is already signed, and the credentials have not
+			// expired yet ignore the signing request.
+			return nil
+		}
+
+		// The credentials have expired for this request. The current signing
+		// is invalid, and needs to be request because the request will fail.
+		if v4.isPresign {
+			v4.removePresign()
+			// Update the request's query string to ensure the values stays in
+			// sync in the case retrieving the new credentials fails.
+			v4.Request.URL.RawQuery = v4.Query.Encode()
+		}
+	}
+
+	var err error
+	v4.CredValues, err = v4.Credentials.Get()
+	if err != nil {
+		return err
+	}
+
+	if v4.isPresign {
+		v4.Query.Set("X-Amz-Algorithm", authHeaderPrefix)
+		if v4.CredValues.SessionToken != "" {
+			v4.Query.Set("X-Amz-Security-Token", v4.CredValues.SessionToken)
+		} else {
+			v4.Query.Del("X-Amz-Security-Token")
+		}
+	} else if v4.CredValues.SessionToken != "" {
+		v4.Request.Header.Set("X-Amz-Security-Token", v4.CredValues.SessionToken)
+	}
+
+	v4.build()
+
+	if v4.Debug.Matches(aws.LogDebugWithSigning) {
+		v4.logSigningInfo()
+	}
+
+	return nil
+}
+
+const logSignInfoMsg = `DEBUG: Request Signiture:
+---[ CANONICAL STRING  ]-----------------------------
+%s
+---[ STRING TO SIGN ]--------------------------------
+%s%s
+-----------------------------------------------------`
+const logSignedURLMsg = `
+---[ SIGNED URL ]------------------------------------
+%s`
+
+func (v4 *signer) logSigningInfo() {
+	signedURLMsg := ""
+	if v4.isPresign {
+		signedURLMsg = fmt.Sprintf(logSignedURLMsg, v4.Request.URL.String())
+	}
+	msg := fmt.Sprintf(logSignInfoMsg, v4.canonicalString, v4.stringToSign, signedURLMsg)
+	v4.Logger.Log(msg)
+}
+
+func (v4 *signer) build() {
+
+	v4.buildTime()             // no depends
+	v4.buildCredentialString() // no depends
+
+	unsignedHeaders := v4.Request.Header
+	if v4.isPresign {
+		if !v4.notHoist {
+			urlValues := url.Values{}
+			urlValues, unsignedHeaders = buildQuery(allowedQueryHoisting, unsignedHeaders) // no depends
+			for k := range urlValues {
+				v4.Query[k] = urlValues[k]
+			}
+		}
+	}
+
+	v4.buildCanonicalHeaders(ignoredHeaders, unsignedHeaders)
+	v4.buildCanonicalString() // depends on canon headers / signed headers
+	v4.buildStringToSign()    // depends on canon string
+	v4.buildSignature()       // depends on string to sign
+
+	if v4.isPresign {
+		v4.Request.URL.RawQuery += "&X-Amz-Signature=" + v4.signature
+	} else {
+		parts := []string{
+			authHeaderPrefix + " Credential=" + v4.CredValues.AccessKeyID + "/" + v4.credentialString,
+			"SignedHeaders=" + v4.signedHeaders,
+			"Signature=" + v4.signature,
+		}
+		v4.Request.Header.Set("Authorization", strings.Join(parts, ", "))
+	}
+}
+
+func (v4 *signer) buildTime() {
+	v4.formattedTime = v4.Time.UTC().Format(timeFormat)
+	v4.formattedShortTime = v4.Time.UTC().Format(shortTimeFormat)
+
+	if v4.isPresign {
+		duration := int64(v4.ExpireTime / time.Second)
+		v4.Query.Set("X-Amz-Date", v4.formattedTime)
+		v4.Query.Set("X-Amz-Expires", strconv.FormatInt(duration, 10))
+	} else {
+		v4.Request.Header.Set("X-Amz-Date", v4.formattedTime)
+	}
+}
+
+func (v4 *signer) buildCredentialString() {
+	v4.credentialString = strings.Join([]string{
+		v4.formattedShortTime,
+		v4.Region,
+		v4.ServiceName,
+		"aws4_request",
+	}, "/")
+
+	if v4.isPresign {
+		v4.Query.Set("X-Amz-Credential", v4.CredValues.AccessKeyID+"/"+v4.credentialString)
+	}
+}
+
+func buildQuery(r rule, header http.Header) (url.Values, http.Header) {
+	query := url.Values{}
+	unsignedHeaders := http.Header{}
+	for k, h := range header {
+		if r.IsValid(k) {
+			query[k] = h
+		} else {
+			unsignedHeaders[k] = h
+		}
+	}
+
+	return query, unsignedHeaders
+}
+func (v4 *signer) buildCanonicalHeaders(r rule, header http.Header) {
+	var headers []string
+	headers = append(headers, "host")
+	for k, v := range header {
+		canonicalKey := http.CanonicalHeaderKey(k)
+		if !r.IsValid(canonicalKey) {
+			continue // ignored header
+		}
+
+		lowerCaseKey := strings.ToLower(k)
+		headers = append(headers, lowerCaseKey)
+
+		if v4.signedHeaderVals == nil {
+			v4.signedHeaderVals = make(http.Header)
+		}
+		v4.signedHeaderVals[lowerCaseKey] = v
+	}
+	sort.Strings(headers)
+
+	v4.signedHeaders = strings.Join(headers, ";")
+
+	if v4.isPresign {
+		v4.Query.Set("X-Amz-SignedHeaders", v4.signedHeaders)
+	}
+
+	headerValues := make([]string, len(headers))
+	for i, k := range headers {
+		if k == "host" {
+			headerValues[i] = "host:" + v4.Request.URL.Host
+		} else {
+			headerValues[i] = k + ":" +
+				strings.Join(v4.Request.Header[http.CanonicalHeaderKey(k)], ",")
+		}
+	}
+
+	v4.canonicalHeaders = strings.Join(headerValues, "\n")
+}
+
+func (v4 *signer) buildCanonicalString() {
+	v4.Request.URL.RawQuery = strings.Replace(v4.Query.Encode(), "+", "%20", -1)
+	uri := v4.Request.URL.Opaque
+	if uri != "" {
+		uri = "/" + strings.Join(strings.Split(uri, "/")[3:], "/")
+	} else {
+		uri = v4.Request.URL.Path
+	}
+	if uri == "" {
+		uri = "/"
+	}
+
+	if v4.ServiceName != "s3" {
+		uri = rest.EscapePath(uri, false)
+	}
+
+	v4.canonicalString = strings.Join([]string{
+		v4.Request.Method,
+		uri,
+		v4.Request.URL.RawQuery,
+		v4.canonicalHeaders + "\n",
+		v4.signedHeaders,
+		v4.bodyDigest(),
+	}, "\n")
+}
+
+func (v4 *signer) buildStringToSign() {
+	v4.stringToSign = strings.Join([]string{
+		authHeaderPrefix,
+		v4.formattedTime,
+		v4.credentialString,
+		hex.EncodeToString(makeSha256([]byte(v4.canonicalString))),
+	}, "\n")
+}
+
+func (v4 *signer) buildSignature() {
+	secret := v4.CredValues.SecretAccessKey
+	date := makeHmac([]byte("AWS4"+secret), []byte(v4.formattedShortTime))
+	region := makeHmac(date, []byte(v4.Region))
+	service := makeHmac(region, []byte(v4.ServiceName))
+	credentials := makeHmac(service, []byte("aws4_request"))
+	signature := makeHmac(credentials, []byte(v4.stringToSign))
+	v4.signature = hex.EncodeToString(signature)
+}
+
+func (v4 *signer) bodyDigest() string {
+	hash := v4.Request.Header.Get("X-Amz-Content-Sha256")
+	if hash == "" {
+		if v4.isPresign && v4.ServiceName == "s3" {
+			hash = "UNSIGNED-PAYLOAD"
+		} else if v4.Body == nil {
+			hash = hex.EncodeToString(makeSha256([]byte{}))
+		} else {
+			hash = hex.EncodeToString(makeSha256Reader(v4.Body))
+		}
+		v4.Request.Header.Add("X-Amz-Content-Sha256", hash)
+	}
+	return hash
+}
+
+// isRequestSigned returns if the request is currently signed or presigned
+func (v4 *signer) isRequestSigned() bool {
+	if v4.isPresign && v4.Query.Get("X-Amz-Signature") != "" {
+		return true
+	}
+	if v4.Request.Header.Get("Authorization") != "" {
+		return true
+	}
+
+	return false
+}
+
+// unsign removes signing flags for both signed and presigned requests.
+func (v4 *signer) removePresign() {
+	v4.Query.Del("X-Amz-Algorithm")
+	v4.Query.Del("X-Amz-Signature")
+	v4.Query.Del("X-Amz-Security-Token")
+	v4.Query.Del("X-Amz-Date")
+	v4.Query.Del("X-Amz-Expires")
+	v4.Query.Del("X-Amz-Credential")
+	v4.Query.Del("X-Amz-SignedHeaders")
+}
+
+func makeHmac(key []byte, data []byte) []byte {
+	hash := hmac.New(sha256.New, key)
+	hash.Write(data)
+	return hash.Sum(nil)
+}
+
+func makeSha256(data []byte) []byte {
+	hash := sha256.New()
+	hash.Write(data)
+	return hash.Sum(nil)
+}
+
+func makeSha256Reader(reader io.ReadSeeker) []byte {
+	hash := sha256.New()
+	start, _ := reader.Seek(0, 1)
+	defer reader.Seek(start, 0)
+
+	io.Copy(hash, reader)
+	return hash.Sum(nil)
+}
diff --git a/vendor/golang.org/x/crypto/poly1305/const_amd64.s b/vendor/golang.org/x/crypto/poly1305/const_amd64.s
new file mode 100644
index 000000000..8e861f337
--- /dev/null
+++ b/vendor/golang.org/x/crypto/poly1305/const_amd64.s
@@ -0,0 +1,45 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This code was translated into a form compatible with 6a from the public
+// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html
+
+// +build amd64,!gccgo,!appengine
+
+DATA ·SCALE(SB)/8, $0x37F4000000000000
+GLOBL ·SCALE(SB), 8, $8
+DATA ·TWO32(SB)/8, $0x41F0000000000000
+GLOBL ·TWO32(SB), 8, $8
+DATA ·TWO64(SB)/8, $0x43F0000000000000
+GLOBL ·TWO64(SB), 8, $8
+DATA ·TWO96(SB)/8, $0x45F0000000000000
+GLOBL ·TWO96(SB), 8, $8
+DATA ·ALPHA32(SB)/8, $0x45E8000000000000
+GLOBL ·ALPHA32(SB), 8, $8
+DATA ·ALPHA64(SB)/8, $0x47E8000000000000
+GLOBL ·ALPHA64(SB), 8, $8
+DATA ·ALPHA96(SB)/8, $0x49E8000000000000
+GLOBL ·ALPHA96(SB), 8, $8
+DATA ·ALPHA130(SB)/8, $0x4C08000000000000
+GLOBL ·ALPHA130(SB), 8, $8
+DATA ·DOFFSET0(SB)/8, $0x4330000000000000
+GLOBL ·DOFFSET0(SB), 8, $8
+DATA ·DOFFSET1(SB)/8, $0x4530000000000000
+GLOBL ·DOFFSET1(SB), 8, $8
+DATA ·DOFFSET2(SB)/8, $0x4730000000000000
+GLOBL ·DOFFSET2(SB), 8, $8
+DATA ·DOFFSET3(SB)/8, $0x4930000000000000
+GLOBL ·DOFFSET3(SB), 8, $8
+DATA ·DOFFSET3MINUSTWO128(SB)/8, $0x492FFFFE00000000
+GLOBL ·DOFFSET3MINUSTWO128(SB), 8, $8
+DATA ·HOFFSET0(SB)/8, $0x43300001FFFFFFFB
+GLOBL ·HOFFSET0(SB), 8, $8
+DATA ·HOFFSET1(SB)/8, $0x45300001FFFFFFFE
+GLOBL ·HOFFSET1(SB), 8, $8
+DATA ·HOFFSET2(SB)/8, $0x47300001FFFFFFFE
+GLOBL ·HOFFSET2(SB), 8, $8
+DATA ·HOFFSET3(SB)/8, $0x49300003FFFFFFFE
+GLOBL ·HOFFSET3(SB), 8, $8
+DATA ·ROUNDING(SB)/2, $0x137f
+GLOBL ·ROUNDING(SB), 8, $2
diff --git a/vendor/golang.org/x/crypto/poly1305/poly1305_amd64.s b/vendor/golang.org/x/crypto/poly1305/poly1305_amd64.s
new file mode 100644
index 000000000..f8d4ee928
--- /dev/null
+++ b/vendor/golang.org/x/crypto/poly1305/poly1305_amd64.s
@@ -0,0 +1,497 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This code was translated into a form compatible with 6a from the public
+// domain sources in SUPERCOP: http://bench.cr.yp.to/supercop.html
+
+// +build amd64,!gccgo,!appengine
+
+// func poly1305(out *[16]byte, m *byte, mlen uint64, key *[32]key)
+TEXT ·poly1305(SB),0,$224-32
+	MOVQ out+0(FP),DI
+	MOVQ m+8(FP),SI
+	MOVQ mlen+16(FP),DX
+	MOVQ key+24(FP),CX
+
+	MOVQ SP,R11
+	MOVQ $31,R9
+	NOTQ R9
+	ANDQ R9,SP
+	ADDQ $32,SP
+
+	MOVQ R11,32(SP)
+	MOVQ R12,40(SP)
+	MOVQ R13,48(SP)
+	MOVQ R14,56(SP)
+	MOVQ R15,64(SP)
+	MOVQ BX,72(SP)
+	MOVQ BP,80(SP)
+	FLDCW ·ROUNDING(SB)
+	MOVL 0(CX),R8
+	MOVL 4(CX),R9
+	MOVL 8(CX),AX
+	MOVL 12(CX),R10
+	MOVQ DI,88(SP)
+	MOVQ CX,96(SP)
+	MOVL $0X43300000,108(SP)
+	MOVL $0X45300000,116(SP)
+	MOVL $0X47300000,124(SP)
+	MOVL $0X49300000,132(SP)
+	ANDL $0X0FFFFFFF,R8
+	ANDL $0X0FFFFFFC,R9
+	ANDL $0X0FFFFFFC,AX
+	ANDL $0X0FFFFFFC,R10
+	MOVL R8,104(SP)
+	MOVL R9,112(SP)
+	MOVL AX,120(SP)
+	MOVL R10,128(SP)
+	FMOVD 104(SP), F0
+	FSUBD ·DOFFSET0(SB), F0
+	FMOVD 112(SP), F0
+	FSUBD ·DOFFSET1(SB), F0
+	FMOVD 120(SP), F0
+	FSUBD ·DOFFSET2(SB), F0
+	FMOVD 128(SP), F0
+	FSUBD ·DOFFSET3(SB), F0
+	FXCHD F0, F3
+	FMOVDP F0, 136(SP)
+	FXCHD F0, F1
+	FMOVD F0, 144(SP)
+	FMULD ·SCALE(SB), F0
+	FMOVDP F0, 152(SP)
+	FMOVD F0, 160(SP)
+	FMULD ·SCALE(SB), F0
+	FMOVDP F0, 168(SP)
+	FMOVD F0, 176(SP)
+	FMULD ·SCALE(SB), F0
+	FMOVDP F0, 184(SP)
+	FLDZ
+	FLDZ
+	FLDZ
+	FLDZ
+	CMPQ DX,$16
+	JB ADDATMOST15BYTES
+	INITIALATLEAST16BYTES:
+	MOVL 12(SI),DI
+	MOVL 8(SI),CX
+	MOVL 4(SI),R8
+	MOVL 0(SI),R9
+	MOVL DI,128(SP)
+	MOVL CX,120(SP)
+	MOVL R8,112(SP)
+	MOVL R9,104(SP)
+	ADDQ $16,SI
+	SUBQ $16,DX
+	FXCHD F0, F3
+	FADDD 128(SP), F0
+	FSUBD ·DOFFSET3MINUSTWO128(SB), F0
+	FXCHD F0, F1
+	FADDD 112(SP), F0
+	FSUBD ·DOFFSET1(SB), F0
+	FXCHD F0, F2
+	FADDD 120(SP), F0
+	FSUBD ·DOFFSET2(SB), F0
+	FXCHD F0, F3
+	FADDD 104(SP), F0
+	FSUBD ·DOFFSET0(SB), F0
+	CMPQ DX,$16
+	JB MULTIPLYADDATMOST15BYTES
+	MULTIPLYADDATLEAST16BYTES:
+	MOVL 12(SI),DI
+	MOVL 8(SI),CX
+	MOVL 4(SI),R8
+	MOVL 0(SI),R9
+	MOVL DI,128(SP)
+	MOVL CX,120(SP)
+	MOVL R8,112(SP)
+	MOVL R9,104(SP)
+	ADDQ $16,SI
+	SUBQ $16,DX
+	FMOVD ·ALPHA130(SB), F0
+	FADDD F2,F0
+	FSUBD ·ALPHA130(SB), F0
+	FSUBD F0,F2
+	FMULD ·SCALE(SB), F0
+	FMOVD ·ALPHA32(SB), F0
+	FADDD F2,F0
+	FSUBD ·ALPHA32(SB), F0
+	FSUBD F0,F2
+	FXCHD F0, F2
+	FADDDP F0,F1
+	FMOVD ·ALPHA64(SB), F0
+	FADDD F4,F0
+	FSUBD ·ALPHA64(SB), F0
+	FSUBD F0,F4
+	FMOVD ·ALPHA96(SB), F0
+	FADDD F6,F0
+	FSUBD ·ALPHA96(SB), F0
+	FSUBD F0,F6
+	FXCHD F0, F6
+	FADDDP F0,F1
+	FXCHD F0, F3
+	FADDDP F0,F5
+	FXCHD F0, F3
+	FADDDP F0,F1
+	FMOVD 176(SP), F0
+	FMULD F3,F0
+	FMOVD 160(SP), F0
+	FMULD F4,F0
+	FMOVD 144(SP), F0
+	FMULD F5,F0
+	FMOVD 136(SP), F0
+	FMULDP F0,F6
+	FMOVD 160(SP), F0
+	FMULD F4,F0
+	FADDDP F0,F3
+	FMOVD 144(SP), F0
+	FMULD F4,F0
+	FADDDP F0,F2
+	FMOVD 136(SP), F0
+	FMULD F4,F0
+	FADDDP F0,F1
+	FMOVD 184(SP), F0
+	FMULDP F0,F4
+	FXCHD F0, F3
+	FADDDP F0,F5
+	FMOVD 144(SP), F0
+	FMULD F4,F0
+	FADDDP F0,F2
+	FMOVD 136(SP), F0
+	FMULD F4,F0
+	FADDDP F0,F1
+	FMOVD 184(SP), F0
+	FMULD F4,F0
+	FADDDP F0,F3
+	FMOVD 168(SP), F0
+	FMULDP F0,F4
+	FXCHD F0, F3
+	FADDDP F0,F4
+	FMOVD 136(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F1
+	FXCHD F0, F3
+	FMOVD 184(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F3
+	FXCHD F0, F1
+	FMOVD 168(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F1
+	FMOVD 152(SP), F0
+	FMULDP F0,F5
+	FXCHD F0, F4
+	FADDDP F0,F1
+	CMPQ DX,$16
+	FXCHD F0, F2
+	FMOVD 128(SP), F0
+	FSUBD ·DOFFSET3MINUSTWO128(SB), F0
+	FADDDP F0,F1
+	FXCHD F0, F1
+	FMOVD 120(SP), F0
+	FSUBD ·DOFFSET2(SB), F0
+	FADDDP F0,F1
+	FXCHD F0, F3
+	FMOVD 112(SP), F0
+	FSUBD ·DOFFSET1(SB), F0
+	FADDDP F0,F1
+	FXCHD F0, F2
+	FMOVD 104(SP), F0
+	FSUBD ·DOFFSET0(SB), F0
+	FADDDP F0,F1
+	JAE MULTIPLYADDATLEAST16BYTES
+	MULTIPLYADDATMOST15BYTES:
+	FMOVD ·ALPHA130(SB), F0
+	FADDD F2,F0
+	FSUBD ·ALPHA130(SB), F0
+	FSUBD F0,F2
+	FMULD ·SCALE(SB), F0
+	FMOVD ·ALPHA32(SB), F0
+	FADDD F2,F0
+	FSUBD ·ALPHA32(SB), F0
+	FSUBD F0,F2
+	FMOVD ·ALPHA64(SB), F0
+	FADDD F5,F0
+	FSUBD ·ALPHA64(SB), F0
+	FSUBD F0,F5
+	FMOVD ·ALPHA96(SB), F0
+	FADDD F7,F0
+	FSUBD ·ALPHA96(SB), F0
+	FSUBD F0,F7
+	FXCHD F0, F7
+	FADDDP F0,F1
+	FXCHD F0, F5
+	FADDDP F0,F1
+	FXCHD F0, F3
+	FADDDP F0,F5
+	FADDDP F0,F1
+	FMOVD 176(SP), F0
+	FMULD F1,F0
+	FMOVD 160(SP), F0
+	FMULD F2,F0
+	FMOVD 144(SP), F0
+	FMULD F3,F0
+	FMOVD 136(SP), F0
+	FMULDP F0,F4
+	FMOVD 160(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F3
+	FMOVD 144(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F2
+	FMOVD 136(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F1
+	FMOVD 184(SP), F0
+	FMULDP F0,F5
+	FXCHD F0, F4
+	FADDDP F0,F3
+	FMOVD 144(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F2
+	FMOVD 136(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F1
+	FMOVD 184(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F4
+	FMOVD 168(SP), F0
+	FMULDP F0,F5
+	FXCHD F0, F4
+	FADDDP F0,F2
+	FMOVD 136(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F1
+	FMOVD 184(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F4
+	FMOVD 168(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F3
+	FMOVD 152(SP), F0
+	FMULDP F0,F5
+	FXCHD F0, F4
+	FADDDP F0,F1
+	ADDATMOST15BYTES:
+	CMPQ DX,$0
+	JE NOMOREBYTES
+	MOVL $0,0(SP)
+	MOVL $0, 4 (SP)
+	MOVL $0, 8 (SP)
+	MOVL $0, 12 (SP)
+	LEAQ 0(SP),DI
+	MOVQ DX,CX
+	REP; MOVSB
+	MOVB $1,0(DI)
+	MOVL  12 (SP),DI
+	MOVL  8 (SP),SI
+	MOVL  4 (SP),DX
+	MOVL 0(SP),CX
+	MOVL DI,128(SP)
+	MOVL SI,120(SP)
+	MOVL DX,112(SP)
+	MOVL CX,104(SP)
+	FXCHD F0, F3
+	FADDD 128(SP), F0
+	FSUBD ·DOFFSET3(SB), F0
+	FXCHD F0, F2
+	FADDD 120(SP), F0
+	FSUBD ·DOFFSET2(SB), F0
+	FXCHD F0, F1
+	FADDD 112(SP), F0
+	FSUBD ·DOFFSET1(SB), F0
+	FXCHD F0, F3
+	FADDD 104(SP), F0
+	FSUBD ·DOFFSET0(SB), F0
+	FMOVD ·ALPHA130(SB), F0
+	FADDD F3,F0
+	FSUBD ·ALPHA130(SB), F0
+	FSUBD F0,F3
+	FMULD ·SCALE(SB), F0
+	FMOVD ·ALPHA32(SB), F0
+	FADDD F2,F0
+	FSUBD ·ALPHA32(SB), F0
+	FSUBD F0,F2
+	FMOVD ·ALPHA64(SB), F0
+	FADDD F6,F0
+	FSUBD ·ALPHA64(SB), F0
+	FSUBD F0,F6
+	FMOVD ·ALPHA96(SB), F0
+	FADDD F5,F0
+	FSUBD ·ALPHA96(SB), F0
+	FSUBD F0,F5
+	FXCHD F0, F4
+	FADDDP F0,F3
+	FXCHD F0, F6
+	FADDDP F0,F1
+	FXCHD F0, F3
+	FADDDP F0,F5
+	FXCHD F0, F3
+	FADDDP F0,F1
+	FMOVD 176(SP), F0
+	FMULD F3,F0
+	FMOVD 160(SP), F0
+	FMULD F4,F0
+	FMOVD 144(SP), F0
+	FMULD F5,F0
+	FMOVD 136(SP), F0
+	FMULDP F0,F6
+	FMOVD 160(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F3
+	FMOVD 144(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F2
+	FMOVD 136(SP), F0
+	FMULD F5,F0
+	FADDDP F0,F1
+	FMOVD 184(SP), F0
+	FMULDP F0,F5
+	FXCHD F0, F4
+	FADDDP F0,F5
+	FMOVD 144(SP), F0
+	FMULD F6,F0
+	FADDDP F0,F2
+	FMOVD 136(SP), F0
+	FMULD F6,F0
+	FADDDP F0,F1
+	FMOVD 184(SP), F0
+	FMULD F6,F0
+	FADDDP F0,F4
+	FMOVD 168(SP), F0
+	FMULDP F0,F6
+	FXCHD F0, F5
+	FADDDP F0,F4
+	FMOVD 136(SP), F0
+	FMULD F2,F0
+	FADDDP F0,F1
+	FMOVD 184(SP), F0
+	FMULD F2,F0
+	FADDDP F0,F5
+	FMOVD 168(SP), F0
+	FMULD F2,F0
+	FADDDP F0,F3
+	FMOVD 152(SP), F0
+	FMULDP F0,F2
+	FXCHD F0, F1
+	FADDDP F0,F3
+	FXCHD F0, F3
+	FXCHD F0, F2
+	NOMOREBYTES:
+	MOVL $0,R10
+	FMOVD ·ALPHA130(SB), F0
+	FADDD F4,F0
+	FSUBD ·ALPHA130(SB), F0
+	FSUBD F0,F4
+	FMULD ·SCALE(SB), F0
+	FMOVD ·ALPHA32(SB), F0
+	FADDD F2,F0
+	FSUBD ·ALPHA32(SB), F0
+	FSUBD F0,F2
+	FMOVD ·ALPHA64(SB), F0
+	FADDD F4,F0
+	FSUBD ·ALPHA64(SB), F0
+	FSUBD F0,F4
+	FMOVD ·ALPHA96(SB), F0
+	FADDD F6,F0
+	FSUBD ·ALPHA96(SB), F0
+	FXCHD F0, F6
+	FSUBD F6,F0
+	FXCHD F0, F4
+	FADDDP F0,F3
+	FXCHD F0, F4
+	FADDDP F0,F1
+	FXCHD F0, F2
+	FADDDP F0,F3
+	FXCHD F0, F4
+	FADDDP F0,F3
+	FXCHD F0, F3
+	FADDD ·HOFFSET0(SB), F0
+	FXCHD F0, F3
+	FADDD ·HOFFSET1(SB), F0
+	FXCHD F0, F1
+	FADDD ·HOFFSET2(SB), F0
+	FXCHD F0, F2
+	FADDD ·HOFFSET3(SB), F0
+	FXCHD F0, F3
+	FMOVDP F0, 104(SP)
+	FMOVDP F0, 112(SP)
+	FMOVDP F0, 120(SP)
+	FMOVDP F0, 128(SP)
+	MOVL 108(SP),DI
+	ANDL $63,DI
+	MOVL 116(SP),SI
+	ANDL $63,SI
+	MOVL 124(SP),DX
+	ANDL $63,DX
+	MOVL 132(SP),CX
+	ANDL $63,CX
+	MOVL 112(SP),R8
+	ADDL DI,R8
+	MOVQ R8,112(SP)
+	MOVL 120(SP),DI
+	ADCL SI,DI
+	MOVQ DI,120(SP)
+	MOVL 128(SP),DI
+	ADCL DX,DI
+	MOVQ DI,128(SP)
+	MOVL R10,DI
+	ADCL CX,DI
+	MOVQ DI,136(SP)
+	MOVQ $5,DI
+	MOVL 104(SP),SI
+	ADDL SI,DI
+	MOVQ DI,104(SP)
+	MOVL R10,DI
+	MOVQ 112(SP),DX
+	ADCL DX,DI
+	MOVQ DI,112(SP)
+	MOVL R10,DI
+	MOVQ 120(SP),CX
+	ADCL CX,DI
+	MOVQ DI,120(SP)
+	MOVL R10,DI
+	MOVQ 128(SP),R8
+	ADCL R8,DI
+	MOVQ DI,128(SP)
+	MOVQ $0XFFFFFFFC,DI
+	MOVQ 136(SP),R9
+	ADCL R9,DI
+	SARL $16,DI
+	MOVQ DI,R9
+	XORL $0XFFFFFFFF,R9
+	ANDQ DI,SI
+	MOVQ 104(SP),AX
+	ANDQ R9,AX
+	ORQ AX,SI
+	ANDQ DI,DX
+	MOVQ 112(SP),AX
+	ANDQ R9,AX
+	ORQ AX,DX
+	ANDQ DI,CX
+	MOVQ 120(SP),AX
+	ANDQ R9,AX
+	ORQ AX,CX
+	ANDQ DI,R8
+	MOVQ 128(SP),DI
+	ANDQ R9,DI
+	ORQ DI,R8
+	MOVQ 88(SP),DI
+	MOVQ 96(SP),R9
+	ADDL 16(R9),SI
+	ADCL 20(R9),DX
+	ADCL 24(R9),CX
+	ADCL 28(R9),R8
+	MOVL SI,0(DI)
+	MOVL DX,4(DI)
+	MOVL CX,8(DI)
+	MOVL R8,12(DI)
+	MOVQ 32(SP),R11
+	MOVQ 40(SP),R12
+	MOVQ 48(SP),R13
+	MOVQ 56(SP),R14
+	MOVQ 64(SP),R15
+	MOVQ 72(SP),BX
+	MOVQ 80(SP),BP
+	MOVQ R11,SP
+	RET
diff --git a/vendor/golang.org/x/crypto/poly1305/poly1305_arm.s b/vendor/golang.org/x/crypto/poly1305/poly1305_arm.s
new file mode 100644
index 000000000..c15386744
--- /dev/null
+++ b/vendor/golang.org/x/crypto/poly1305/poly1305_arm.s
@@ -0,0 +1,379 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This code was translated into a form compatible with 5a from the public
+// domain source by Andrew Moon: github.com/floodyberry/poly1305-opt/blob/master/app/extensions/poly1305.
+
+// +build arm,!gccgo,!appengine
+
+DATA poly1305_init_constants_armv6<>+0x00(SB)/4, $0x3ffffff
+DATA poly1305_init_constants_armv6<>+0x04(SB)/4, $0x3ffff03
+DATA poly1305_init_constants_armv6<>+0x08(SB)/4, $0x3ffc0ff
+DATA poly1305_init_constants_armv6<>+0x0c(SB)/4, $0x3f03fff
+DATA poly1305_init_constants_armv6<>+0x10(SB)/4, $0x00fffff
+GLOBL poly1305_init_constants_armv6<>(SB), 8, $20
+
+// Warning: the linker may use R11 to synthesize certain instructions. Please
+// take care and verify that no synthetic instructions use it.
+
+TEXT poly1305_init_ext_armv6<>(SB),4,$-4
+  MOVM.DB.W [R4-R11], (R13)
+  MOVM.IA.W (R1), [R2-R5]
+  MOVW $poly1305_init_constants_armv6<>(SB), R7
+  MOVW R2, R8
+  MOVW R2>>26, R9
+  MOVW R3>>20, g
+  MOVW R4>>14, R11
+  MOVW R5>>8, R12
+  ORR R3<<6, R9, R9
+  ORR R4<<12, g, g
+  ORR R5<<18, R11, R11
+  MOVM.IA (R7), [R2-R6]
+  AND R8, R2, R2
+  AND R9, R3, R3
+  AND g, R4, R4
+  AND R11, R5, R5
+  AND R12, R6, R6
+  MOVM.IA.W [R2-R6], (R0)
+  EOR R2, R2, R2
+  EOR R3, R3, R3
+  EOR R4, R4, R4
+  EOR R5, R5, R5
+  EOR R6, R6, R6
+  MOVM.IA.W [R2-R6], (R0)
+  MOVM.IA.W (R1), [R2-R5]
+  MOVM.IA [R2-R6], (R0)
+  MOVM.IA.W (R13), [R4-R11]
+  RET
+
+#define MOVW_UNALIGNED(Rsrc, Rdst, Rtmp, offset) \
+  MOVBU (offset+0)(Rsrc), Rtmp; \
+  MOVBU Rtmp, (offset+0)(Rdst); \
+  MOVBU (offset+1)(Rsrc), Rtmp; \
+  MOVBU Rtmp, (offset+1)(Rdst); \
+  MOVBU (offset+2)(Rsrc), Rtmp; \
+  MOVBU Rtmp, (offset+2)(Rdst); \
+  MOVBU (offset+3)(Rsrc), Rtmp; \
+  MOVBU Rtmp, (offset+3)(Rdst)
+
+TEXT poly1305_blocks_armv6<>(SB),4,$-4
+  MOVM.DB.W [R4, R5, R6, R7, R8, R9, g, R11, R14], (R13)
+  SUB $128, R13
+  MOVW R0, 36(R13)
+  MOVW R1, 40(R13)
+  MOVW R2, 44(R13)
+  MOVW R1, R14
+  MOVW R2, R12
+  MOVW 56(R0), R8
+  WORD $0xe1180008 // TST R8, R8 not working see issue 5921
+  EOR R6, R6, R6
+  MOVW.EQ $(1<<24), R6
+  MOVW R6, 32(R13)
+  ADD $64, R13, g
+  MOVM.IA (R0), [R0-R9]
+  MOVM.IA [R0-R4], (g)
+  CMP $16, R12
+  BLO poly1305_blocks_armv6_done
+poly1305_blocks_armv6_mainloop:
+  WORD $0xe31e0003 // TST R14, #3 not working see issue 5921
+  BEQ poly1305_blocks_armv6_mainloop_aligned
+  ADD $48, R13, g
+  MOVW_UNALIGNED(R14, g, R0, 0)
+  MOVW_UNALIGNED(R14, g, R0, 4)
+  MOVW_UNALIGNED(R14, g, R0, 8)
+  MOVW_UNALIGNED(R14, g, R0, 12)
+  MOVM.IA (g), [R0-R3]
+  ADD $16, R14
+  B poly1305_blocks_armv6_mainloop_loaded
+poly1305_blocks_armv6_mainloop_aligned:
+  MOVM.IA.W (R14), [R0-R3]
+poly1305_blocks_armv6_mainloop_loaded:
+  MOVW R0>>26, g
+  MOVW R1>>20, R11
+  MOVW R2>>14, R12
+  MOVW R14, 40(R13)
+  MOVW R3>>8, R4
+  ORR R1<<6, g, g
+  ORR R2<<12, R11, R11
+  ORR R3<<18, R12, R12
+  BIC $0xfc000000, R0, R0
+  BIC $0xfc000000, g, g
+  MOVW 32(R13), R3
+  BIC $0xfc000000, R11, R11
+  BIC $0xfc000000, R12, R12
+  ADD R0, R5, R5
+  ADD g, R6, R6
+  ORR R3, R4, R4
+  ADD R11, R7, R7
+  ADD $64, R13, R14
+  ADD R12, R8, R8
+  ADD R4, R9, R9
+  MOVM.IA (R14), [R0-R4]
+  MULLU R4, R5, (R11, g)
+  MULLU R3, R5, (R14, R12)
+  MULALU R3, R6, (R11, g)
+  MULALU R2, R6, (R14, R12)
+  MULALU R2, R7, (R11, g)
+  MULALU R1, R7, (R14, R12)
+  ADD R4<<2, R4, R4
+  ADD R3<<2, R3, R3
+  MULALU R1, R8, (R11, g)
+  MULALU R0, R8, (R14, R12)
+  MULALU R0, R9, (R11, g)
+  MULALU R4, R9, (R14, R12)
+  MOVW g, 24(R13)
+  MOVW R11, 28(R13)
+  MOVW R12, 16(R13)
+  MOVW R14, 20(R13)
+  MULLU R2, R5, (R11, g)
+  MULLU R1, R5, (R14, R12)
+  MULALU R1, R6, (R11, g)
+  MULALU R0, R6, (R14, R12)
+  MULALU R0, R7, (R11, g)
+  MULALU R4, R7, (R14, R12)
+  ADD R2<<2, R2, R2
+  ADD R1<<2, R1, R1
+  MULALU R4, R8, (R11, g)
+  MULALU R3, R8, (R14, R12)
+  MULALU R3, R9, (R11, g)
+  MULALU R2, R9, (R14, R12)
+  MOVW g, 8(R13)
+  MOVW R11, 12(R13)
+  MOVW R12, 0(R13)
+  MOVW R14, w+4(SP)
+  MULLU R0, R5, (R11, g)
+  MULALU R4, R6, (R11, g)
+  MULALU R3, R7, (R11, g)
+  MULALU R2, R8, (R11, g)
+  MULALU R1, R9, (R11, g)
+  MOVM.IA (R13), [R0-R7]
+  MOVW g>>26, R12
+  MOVW R4>>26, R14
+  ORR R11<<6, R12, R12
+  ORR R5<<6, R14, R14
+  BIC $0xfc000000, g, g
+  BIC $0xfc000000, R4, R4
+  ADD.S R12, R0, R0
+  ADC $0, R1, R1
+  ADD.S R14, R6, R6
+  ADC $0, R7, R7
+  MOVW R0>>26, R12
+  MOVW R6>>26, R14
+  ORR R1<<6, R12, R12
+  ORR R7<<6, R14, R14
+  BIC $0xfc000000, R0, R0
+  BIC $0xfc000000, R6, R6
+  ADD R14<<2, R14, R14
+  ADD.S R12, R2, R2
+  ADC $0, R3, R3
+  ADD R14, g, g
+  MOVW R2>>26, R12
+  MOVW g>>26, R14
+  ORR R3<<6, R12, R12
+  BIC $0xfc000000, g, R5
+  BIC $0xfc000000, R2, R7
+  ADD R12, R4, R4
+  ADD R14, R0, R0
+  MOVW R4>>26, R12
+  BIC $0xfc000000, R4, R8
+  ADD R12, R6, R9
+  MOVW w+44(SP), R12
+  MOVW w+40(SP), R14
+  MOVW R0, R6
+  CMP $32, R12
+  SUB $16, R12, R12
+  MOVW R12, 44(R13)
+  BHS poly1305_blocks_armv6_mainloop
+poly1305_blocks_armv6_done:
+  MOVW 36(R13), R12
+  MOVW R5, 20(R12)
+  MOVW R6, 24(R12)
+  MOVW R7, 28(R12)
+  MOVW R8, 32(R12)
+  MOVW R9, 36(R12)
+  ADD $128, R13, R13
+  MOVM.IA.W (R13), [R4, R5, R6, R7, R8, R9, g, R11, R14]
+  RET
+
+#define MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp) \
+  MOVBU.P 1(Rsrc), Rtmp; \
+  MOVBU.P Rtmp, 1(Rdst); \
+  MOVBU.P 1(Rsrc), Rtmp; \
+  MOVBU.P Rtmp, 1(Rdst)
+
+#define MOVWP_UNALIGNED(Rsrc, Rdst, Rtmp) \
+  MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp); \
+  MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp)
+
+TEXT poly1305_finish_ext_armv6<>(SB),4,$-4
+  MOVM.DB.W [R4, R5, R6, R7, R8, R9, g, R11, R14], (R13)
+  SUB $16, R13, R13
+  MOVW R0, R5
+  MOVW R1, R6
+  MOVW R2, R7
+  MOVW R3, R8
+  AND.S R2, R2, R2
+  BEQ poly1305_finish_ext_armv6_noremaining
+  EOR R0, R0
+  MOVW R13, R9
+  MOVW R0, 0(R13)
+  MOVW R0, 4(R13)
+  MOVW R0, 8(R13)
+  MOVW R0, 12(R13)
+  WORD $0xe3110003 // TST R1, #3 not working see issue 5921
+  BEQ poly1305_finish_ext_armv6_aligned
+  WORD $0xe3120008 // TST R2, #8 not working see issue 5921
+  BEQ poly1305_finish_ext_armv6_skip8
+  MOVWP_UNALIGNED(R1, R9, g)
+  MOVWP_UNALIGNED(R1, R9, g)
+poly1305_finish_ext_armv6_skip8:
+  WORD $0xe3120004 // TST $4, R2 not working see issue 5921
+  BEQ poly1305_finish_ext_armv6_skip4
+  MOVWP_UNALIGNED(R1, R9, g)
+poly1305_finish_ext_armv6_skip4:
+  WORD $0xe3120002 // TST $2, R2 not working see issue 5921
+  BEQ poly1305_finish_ext_armv6_skip2
+  MOVHUP_UNALIGNED(R1, R9, g)
+  B poly1305_finish_ext_armv6_skip2
+poly1305_finish_ext_armv6_aligned:
+  WORD $0xe3120008 // TST R2, #8 not working see issue 5921
+  BEQ poly1305_finish_ext_armv6_skip8_aligned
+  MOVM.IA.W (R1), [g-R11]
+  MOVM.IA.W [g-R11], (R9)
+poly1305_finish_ext_armv6_skip8_aligned:
+  WORD $0xe3120004 // TST $4, R2 not working see issue 5921
+  BEQ poly1305_finish_ext_armv6_skip4_aligned
+  MOVW.P 4(R1), g
+  MOVW.P g, 4(R9)
+poly1305_finish_ext_armv6_skip4_aligned:
+  WORD $0xe3120002 // TST $2, R2 not working see issue 5921
+  BEQ poly1305_finish_ext_armv6_skip2
+  MOVHU.P 2(R1), g
+  MOVH.P g, 2(R9)
+poly1305_finish_ext_armv6_skip2:
+  WORD $0xe3120001 // TST $1, R2 not working see issue 5921
+  BEQ poly1305_finish_ext_armv6_skip1
+  MOVBU.P 1(R1), g
+  MOVBU.P g, 1(R9)
+poly1305_finish_ext_armv6_skip1:
+  MOVW $1, R11
+  MOVBU R11, 0(R9)
+  MOVW R11, 56(R5)
+  MOVW R5, R0
+  MOVW R13, R1
+  MOVW $16, R2
+  BL poly1305_blocks_armv6<>(SB)
+poly1305_finish_ext_armv6_noremaining:
+  MOVW 20(R5), R0
+  MOVW 24(R5), R1
+  MOVW 28(R5), R2
+  MOVW 32(R5), R3
+  MOVW 36(R5), R4
+  MOVW R4>>26, R12
+  BIC $0xfc000000, R4, R4
+  ADD R12<<2, R12, R12
+  ADD R12, R0, R0
+  MOVW R0>>26, R12
+  BIC $0xfc000000, R0, R0
+  ADD R12, R1, R1
+  MOVW R1>>26, R12
+  BIC $0xfc000000, R1, R1
+  ADD R12, R2, R2
+  MOVW R2>>26, R12
+  BIC $0xfc000000, R2, R2
+  ADD R12, R3, R3
+  MOVW R3>>26, R12
+  BIC $0xfc000000, R3, R3
+  ADD R12, R4, R4
+  ADD $5, R0, R6
+  MOVW R6>>26, R12
+  BIC $0xfc000000, R6, R6
+  ADD R12, R1, R7
+  MOVW R7>>26, R12
+  BIC $0xfc000000, R7, R7
+  ADD R12, R2, g
+  MOVW g>>26, R12
+  BIC $0xfc000000, g, g
+  ADD R12, R3, R11
+  MOVW $-(1<<26), R12
+  ADD R11>>26, R12, R12
+  BIC $0xfc000000, R11, R11
+  ADD R12, R4, R14
+  MOVW R14>>31, R12
+  SUB $1, R12
+  AND R12, R6, R6
+  AND R12, R7, R7
+  AND R12, g, g
+  AND R12, R11, R11
+  AND R12, R14, R14
+  MVN R12, R12
+  AND R12, R0, R0
+  AND R12, R1, R1
+  AND R12, R2, R2
+  AND R12, R3, R3
+  AND R12, R4, R4
+  ORR R6, R0, R0
+  ORR R7, R1, R1
+  ORR g, R2, R2
+  ORR R11, R3, R3
+  ORR R14, R4, R4
+  ORR R1<<26, R0, R0
+  MOVW R1>>6, R1
+  ORR R2<<20, R1, R1
+  MOVW R2>>12, R2
+  ORR R3<<14, R2, R2
+  MOVW R3>>18, R3
+  ORR R4<<8, R3, R3
+  MOVW 40(R5), R6
+  MOVW 44(R5), R7
+  MOVW 48(R5), g
+  MOVW 52(R5), R11
+  ADD.S R6, R0, R0
+  ADC.S R7, R1, R1
+  ADC.S g, R2, R2
+  ADC.S R11, R3, R3
+  MOVM.IA [R0-R3], (R8)
+  MOVW R5, R12
+  EOR R0, R0, R0
+  EOR R1, R1, R1
+  EOR R2, R2, R2
+  EOR R3, R3, R3
+  EOR R4, R4, R4
+  EOR R5, R5, R5
+  EOR R6, R6, R6
+  EOR R7, R7, R7
+  MOVM.IA.W [R0-R7], (R12)
+  MOVM.IA [R0-R7], (R12)
+  ADD $16, R13, R13
+  MOVM.IA.W (R13), [R4, R5, R6, R7, R8, R9, g, R11, R14]
+  RET
+
+// func poly1305_auth_armv6(out *[16]byte, m *byte, mlen uint32, key *[32]key)
+TEXT ·poly1305_auth_armv6(SB),0,$280-16
+  MOVW  out+0(FP), R4
+  MOVW  m+4(FP), R5
+  MOVW  mlen+8(FP), R6
+  MOVW  key+12(FP), R7
+
+  MOVW R13, R8
+  BIC $63, R13
+  SUB $64, R13, R13
+  MOVW  R13, R0
+  MOVW  R7, R1
+  BL poly1305_init_ext_armv6<>(SB)
+  BIC.S $15, R6, R2
+  BEQ poly1305_auth_armv6_noblocks
+  MOVW R13, R0
+  MOVW R5, R1
+  ADD R2, R5, R5
+  SUB R2, R6, R6
+  BL poly1305_blocks_armv6<>(SB)
+poly1305_auth_armv6_noblocks:
+  MOVW R13, R0
+  MOVW R5, R1
+  MOVW R6, R2
+  MOVW R4, R3
+  BL poly1305_finish_ext_armv6<>(SB)
+  MOVW R8, R13
+  RET
diff --git a/vendor/golang.org/x/net/context/ctxhttp/cancelreq.go b/vendor/golang.org/x/net/context/ctxhttp/cancelreq.go
new file mode 100644
index 000000000..e3170e333
--- /dev/null
+++ b/vendor/golang.org/x/net/context/ctxhttp/cancelreq.go
@@ -0,0 +1,19 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.5
+
+package ctxhttp
+
+import "net/http"
+
+func canceler(client *http.Client, req *http.Request) func() {
+	// TODO(djd): Respect any existing value of req.Cancel.
+	ch := make(chan struct{})
+	req.Cancel = ch
+
+	return func() {
+		close(ch)
+	}
+}
diff --git a/vendor/golang.org/x/net/context/ctxhttp/cancelreq_go14.go b/vendor/golang.org/x/net/context/ctxhttp/cancelreq_go14.go
new file mode 100644
index 000000000..56bcbadb8
--- /dev/null
+++ b/vendor/golang.org/x/net/context/ctxhttp/cancelreq_go14.go
@@ -0,0 +1,23 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.5
+
+package ctxhttp
+
+import "net/http"
+
+type requestCanceler interface {
+	CancelRequest(*http.Request)
+}
+
+func canceler(client *http.Client, req *http.Request) func() {
+	rc, ok := client.Transport.(requestCanceler)
+	if !ok {
+		return func() {}
+	}
+	return func() {
+		rc.CancelRequest(req)
+	}
+}