Merge branch 'the-spice-must-flow' into 'main'

Add SpiceDB Authorization

See merge request gitlab-org/software-supply-chain-security/authorization/sparkled!19

24 files changed, 2168 insertions, 0 deletions

diff --git a/vendor/github.com/aws/smithy-go/encoding/doc.go b/vendor/github.com/aws/smithy-go/encoding/doc.go
new file mode 100644
index 0000000..792fdfa
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/doc.go
@@ -0,0 +1,4 @@
+// Package encoding provides utilities for encoding values for specific
+// document encodings.
+
+package encoding
diff --git a/vendor/github.com/aws/smithy-go/encoding/encoding.go b/vendor/github.com/aws/smithy-go/encoding/encoding.go
new file mode 100644
index 0000000..2fdfb52
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/encoding.go
@@ -0,0 +1,40 @@
+package encoding
+
+import (
+	"fmt"
+	"math"
+	"strconv"
+)
+
+// EncodeFloat encodes a float value as per the stdlib encoder for json and xml protocol
+// This encodes a float value into dst while attempting to conform to ES6 ToString for Numbers
+//
+// Based on encoding/json floatEncoder from the Go Standard Library
+// https://golang.org/src/encoding/json/encode.go
+func EncodeFloat(dst []byte, v float64, bits int) []byte {
+	if math.IsInf(v, 0) || math.IsNaN(v) {
+		panic(fmt.Sprintf("invalid float value: %s", strconv.FormatFloat(v, 'g', -1, bits)))
+	}
+
+	abs := math.Abs(v)
+	fmt := byte('f')
+
+	if abs != 0 {
+		if bits == 64 && (abs < 1e-6 || abs >= 1e21) || bits == 32 && (float32(abs) < 1e-6 || float32(abs) >= 1e21) {
+			fmt = 'e'
+		}
+	}
+
+	dst = strconv.AppendFloat(dst, v, fmt, -1, bits)
+
+	if fmt == 'e' {
+		// clean up e-09 to e-9
+		n := len(dst)
+		if n >= 4 && dst[n-4] == 'e' && dst[n-3] == '-' && dst[n-2] == '0' {
+			dst[n-2] = dst[n-1]
+			dst = dst[:n-1]
+		}
+	}
+
+	return dst
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/httpbinding/encode.go b/vendor/github.com/aws/smithy-go/encoding/httpbinding/encode.go
new file mode 100644
index 0000000..543e7cf
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/httpbinding/encode.go
@@ -0,0 +1,123 @@
+package httpbinding
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+)
+
+const (
+	contentLengthHeader = "Content-Length"
+	floatNaN            = "NaN"
+	floatInfinity       = "Infinity"
+	floatNegInfinity    = "-Infinity"
+)
+
+// An Encoder provides encoding of REST URI path, query, and header components
+// of an HTTP request. Can also encode a stream as the payload.
+//
+// Does not support SetFields.
+type Encoder struct {
+	path, rawPath, pathBuffer []byte
+
+	query  url.Values
+	header http.Header
+}
+
+// NewEncoder creates a new encoder from the passed in request. It assumes that
+// raw path contains no valuable information at this point, so it passes in path
+// as path and raw path for subsequent trans
+func NewEncoder(path, query string, headers http.Header) (*Encoder, error) {
+	return NewEncoderWithRawPath(path, path, query, headers)
+}
+
+// NewHTTPBindingEncoder creates a new encoder from the passed in request. All query and
+// header values will be added on top of the request's existing values. Overwriting
+// duplicate values.
+func NewEncoderWithRawPath(path, rawPath, query string, headers http.Header) (*Encoder, error) {
+	parseQuery, err := url.ParseQuery(query)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse query string: %w", err)
+	}
+
+	e := &Encoder{
+		path:    []byte(path),
+		rawPath: []byte(rawPath),
+		query:   parseQuery,
+		header:  headers.Clone(),
+	}
+
+	return e, nil
+}
+
+// Encode returns a REST protocol encoder for encoding HTTP bindings.
+//
+// Due net/http requiring `Content-Length` to be specified on the http.Request#ContentLength directly. Encode
+// will look for whether the header is present, and if so will remove it and set the respective value on http.Request.
+//
+// Returns any error occurring during encoding.
+func (e *Encoder) Encode(req *http.Request) (*http.Request, error) {
+	req.URL.Path, req.URL.RawPath = string(e.path), string(e.rawPath)
+	req.URL.RawQuery = e.query.Encode()
+
+	// net/http ignores Content-Length header and requires it to be set on http.Request
+	if v := e.header.Get(contentLengthHeader); len(v) > 0 {
+		iv, err := strconv.ParseInt(v, 10, 64)
+		if err != nil {
+			return nil, err
+		}
+		req.ContentLength = iv
+		e.header.Del(contentLengthHeader)
+	}
+
+	req.Header = e.header
+
+	return req, nil
+}
+
+// AddHeader returns a HeaderValue for appending to the given header name
+func (e *Encoder) AddHeader(key string) HeaderValue {
+	return newHeaderValue(e.header, key, true)
+}
+
+// SetHeader returns a HeaderValue for setting the given header name
+func (e *Encoder) SetHeader(key string) HeaderValue {
+	return newHeaderValue(e.header, key, false)
+}
+
+// Headers returns a Header used for encoding headers with the given prefix
+func (e *Encoder) Headers(prefix string) Headers {
+	return Headers{
+		header: e.header,
+		prefix: strings.TrimSpace(prefix),
+	}
+}
+
+// HasHeader returns if a header with the key specified exists with one or
+// more value.
+func (e Encoder) HasHeader(key string) bool {
+	return len(e.header[key]) != 0
+}
+
+// SetURI returns a URIValue used for setting the given path key
+func (e *Encoder) SetURI(key string) URIValue {
+	return newURIValue(&e.path, &e.rawPath, &e.pathBuffer, key)
+}
+
+// SetQuery returns a QueryValue used for setting the given query key
+func (e *Encoder) SetQuery(key string) QueryValue {
+	return NewQueryValue(e.query, key, false)
+}
+
+// AddQuery returns a QueryValue used for appending the given query key
+func (e *Encoder) AddQuery(key string) QueryValue {
+	return NewQueryValue(e.query, key, true)
+}
+
+// HasQuery returns if a query with the key specified exists with one or
+// more values.
+func (e *Encoder) HasQuery(key string) bool {
+	return len(e.query.Get(key)) != 0
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/httpbinding/header.go b/vendor/github.com/aws/smithy-go/encoding/httpbinding/header.go
new file mode 100644
index 0000000..f9256e1
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/httpbinding/header.go
@@ -0,0 +1,122 @@
+package httpbinding
+
+import (
+	"encoding/base64"
+	"math"
+	"math/big"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+// Headers is used to encode header keys using a provided prefix
+type Headers struct {
+	header http.Header
+	prefix string
+}
+
+// AddHeader returns a HeaderValue used to append values to prefix+key
+func (h Headers) AddHeader(key string) HeaderValue {
+	return h.newHeaderValue(key, true)
+}
+
+// SetHeader returns a HeaderValue used to set the value of prefix+key
+func (h Headers) SetHeader(key string) HeaderValue {
+	return h.newHeaderValue(key, false)
+}
+
+func (h Headers) newHeaderValue(key string, append bool) HeaderValue {
+	return newHeaderValue(h.header, h.prefix+strings.TrimSpace(key), append)
+}
+
+// HeaderValue is used to encode values to an HTTP header
+type HeaderValue struct {
+	header http.Header
+	key    string
+	append bool
+}
+
+func newHeaderValue(header http.Header, key string, append bool) HeaderValue {
+	return HeaderValue{header: header, key: strings.TrimSpace(key), append: append}
+}
+
+func (h HeaderValue) modifyHeader(value string) {
+	if h.append {
+		h.header[h.key] = append(h.header[h.key], value)
+	} else {
+		h.header[h.key] = append(h.header[h.key][:0], value)
+	}
+}
+
+// String encodes the value v as the header string value
+func (h HeaderValue) String(v string) {
+	h.modifyHeader(v)
+}
+
+// Byte encodes the value v as a query string value
+func (h HeaderValue) Byte(v int8) {
+	h.Long(int64(v))
+}
+
+// Short encodes the value v as a query string value
+func (h HeaderValue) Short(v int16) {
+	h.Long(int64(v))
+}
+
+// Integer encodes the value v as the header string value
+func (h HeaderValue) Integer(v int32) {
+	h.Long(int64(v))
+}
+
+// Long encodes the value v as the header string value
+func (h HeaderValue) Long(v int64) {
+	h.modifyHeader(strconv.FormatInt(v, 10))
+}
+
+// Boolean encodes the value v as a query string value
+func (h HeaderValue) Boolean(v bool) {
+	h.modifyHeader(strconv.FormatBool(v))
+}
+
+// Float encodes the value v as a query string value
+func (h HeaderValue) Float(v float32) {
+	h.float(float64(v), 32)
+}
+
+// Double encodes the value v as a query string value
+func (h HeaderValue) Double(v float64) {
+	h.float(v, 64)
+}
+
+func (h HeaderValue) float(v float64, bitSize int) {
+	switch {
+	case math.IsNaN(v):
+		h.String(floatNaN)
+	case math.IsInf(v, 1):
+		h.String(floatInfinity)
+	case math.IsInf(v, -1):
+		h.String(floatNegInfinity)
+	default:
+		h.modifyHeader(strconv.FormatFloat(v, 'f', -1, bitSize))
+	}
+}
+
+// BigInteger encodes the value v as a query string value
+func (h HeaderValue) BigInteger(v *big.Int) {
+	h.modifyHeader(v.String())
+}
+
+// BigDecimal encodes the value v as a query string value
+func (h HeaderValue) BigDecimal(v *big.Float) {
+	if i, accuracy := v.Int64(); accuracy == big.Exact {
+		h.Long(i)
+		return
+	}
+	h.modifyHeader(v.Text('e', -1))
+}
+
+// Blob encodes the value v as a base64 header string value
+func (h HeaderValue) Blob(v []byte) {
+	encodeToString := base64.StdEncoding.EncodeToString(v)
+	h.modifyHeader(encodeToString)
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/httpbinding/path_replace.go b/vendor/github.com/aws/smithy-go/encoding/httpbinding/path_replace.go
new file mode 100644
index 0000000..9ae3085
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/httpbinding/path_replace.go
@@ -0,0 +1,108 @@
+package httpbinding
+
+import (
+	"bytes"
+	"fmt"
+)
+
+const (
+	uriTokenStart = '{'
+	uriTokenStop  = '}'
+	uriTokenSkip  = '+'
+)
+
+func bufCap(b []byte, n int) []byte {
+	if cap(b) < n {
+		return make([]byte, 0, n)
+	}
+
+	return b[0:0]
+}
+
+// replacePathElement replaces a single element in the path []byte.
+// Escape is used to control whether the value will be escaped using Amazon path escape style.
+func replacePathElement(path, fieldBuf []byte, key, val string, escape bool) ([]byte, []byte, error) {
+	// search for "{<key>}". If not found, search for the greedy version "{<key>+}". If none are found, return error
+	fieldBuf = bufCap(fieldBuf, len(key)+2) // { <key> }
+	fieldBuf = append(fieldBuf, uriTokenStart)
+	fieldBuf = append(fieldBuf, key...)
+	fieldBuf = append(fieldBuf, uriTokenStop)
+
+	start := bytes.Index(path, fieldBuf)
+	encodeSep := true
+	if start < 0 {
+		fieldBuf = bufCap(fieldBuf, len(key)+3) // { <key> [+] }
+		fieldBuf = append(fieldBuf, uriTokenStart)
+		fieldBuf = append(fieldBuf, key...)
+		fieldBuf = append(fieldBuf, uriTokenSkip)
+		fieldBuf = append(fieldBuf, uriTokenStop)
+
+		start = bytes.Index(path, fieldBuf)
+		if start < 0 {
+			return path, fieldBuf, fmt.Errorf("invalid path index, start=%d. %s", start, path)
+		}
+		encodeSep = false
+	}
+	end := start + len(fieldBuf)
+
+	if escape {
+		val = EscapePath(val, encodeSep)
+	}
+
+	fieldBuf = bufCap(fieldBuf, len(val))
+	fieldBuf = append(fieldBuf, val...)
+
+	keyLen := end - start
+	valLen := len(fieldBuf)
+
+	if keyLen == valLen {
+		copy(path[start:], fieldBuf)
+		return path, fieldBuf, nil
+	}
+
+	newLen := len(path) + (valLen - keyLen)
+	if len(path) < newLen {
+		path = path[:cap(path)]
+	}
+	if cap(path) < newLen {
+		newURI := make([]byte, newLen)
+		copy(newURI, path)
+		path = newURI
+	}
+
+	// shift
+	copy(path[start+valLen:], path[end:])
+	path = path[:newLen]
+	copy(path[start:], fieldBuf)
+
+	return path, fieldBuf, nil
+}
+
+// EscapePath escapes part of a URL path in Amazon style.
+func EscapePath(path string, encodeSep bool) string {
+	var buf bytes.Buffer
+	for i := 0; i < len(path); i++ {
+		c := path[i]
+		if noEscape[c] || (c == '/' && !encodeSep) {
+			buf.WriteByte(c)
+		} else {
+			fmt.Fprintf(&buf, "%%%02X", c)
+		}
+	}
+	return buf.String()
+}
+
+var noEscape [256]bool
+
+func init() {
+	for i := 0; i < len(noEscape); i++ {
+		// AWS expects every character except these to be escaped
+		noEscape[i] = (i >= 'A' && i <= 'Z') ||
+			(i >= 'a' && i <= 'z') ||
+			(i >= '0' && i <= '9') ||
+			i == '-' ||
+			i == '.' ||
+			i == '_' ||
+			i == '~'
+	}
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/httpbinding/query.go b/vendor/github.com/aws/smithy-go/encoding/httpbinding/query.go
new file mode 100644
index 0000000..c2e7d0a
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/httpbinding/query.go
@@ -0,0 +1,107 @@
+package httpbinding
+
+import (
+	"encoding/base64"
+	"math"
+	"math/big"
+	"net/url"
+	"strconv"
+)
+
+// QueryValue is used to encode query key values
+type QueryValue struct {
+	query  url.Values
+	key    string
+	append bool
+}
+
+// NewQueryValue creates a new QueryValue which enables encoding
+// a query value into the given url.Values.
+func NewQueryValue(query url.Values, key string, append bool) QueryValue {
+	return QueryValue{
+		query:  query,
+		key:    key,
+		append: append,
+	}
+}
+
+func (qv QueryValue) updateKey(value string) {
+	if qv.append {
+		qv.query.Add(qv.key, value)
+	} else {
+		qv.query.Set(qv.key, value)
+	}
+}
+
+// Blob encodes v as a base64 query string value
+func (qv QueryValue) Blob(v []byte) {
+	encodeToString := base64.StdEncoding.EncodeToString(v)
+	qv.updateKey(encodeToString)
+}
+
+// Boolean encodes v as a query string value
+func (qv QueryValue) Boolean(v bool) {
+	qv.updateKey(strconv.FormatBool(v))
+}
+
+// String encodes v as a query string value
+func (qv QueryValue) String(v string) {
+	qv.updateKey(v)
+}
+
+// Byte encodes v as a query string value
+func (qv QueryValue) Byte(v int8) {
+	qv.Long(int64(v))
+}
+
+// Short encodes v as a query string value
+func (qv QueryValue) Short(v int16) {
+	qv.Long(int64(v))
+}
+
+// Integer encodes v as a query string value
+func (qv QueryValue) Integer(v int32) {
+	qv.Long(int64(v))
+}
+
+// Long encodes v as a query string value
+func (qv QueryValue) Long(v int64) {
+	qv.updateKey(strconv.FormatInt(v, 10))
+}
+
+// Float encodes v as a query string value
+func (qv QueryValue) Float(v float32) {
+	qv.float(float64(v), 32)
+}
+
+// Double encodes v as a query string value
+func (qv QueryValue) Double(v float64) {
+	qv.float(v, 64)
+}
+
+func (qv QueryValue) float(v float64, bitSize int) {
+	switch {
+	case math.IsNaN(v):
+		qv.String(floatNaN)
+	case math.IsInf(v, 1):
+		qv.String(floatInfinity)
+	case math.IsInf(v, -1):
+		qv.String(floatNegInfinity)
+	default:
+		qv.updateKey(strconv.FormatFloat(v, 'f', -1, bitSize))
+	}
+}
+
+// BigInteger encodes v as a query string value
+func (qv QueryValue) BigInteger(v *big.Int) {
+	qv.updateKey(v.String())
+}
+
+// BigDecimal encodes v as a query string value
+func (qv QueryValue) BigDecimal(v *big.Float) {
+	if i, accuracy := v.Int64(); accuracy == big.Exact {
+		qv.Long(i)
+		return
+	}
+	qv.updateKey(v.Text('e', -1))
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/httpbinding/uri.go b/vendor/github.com/aws/smithy-go/encoding/httpbinding/uri.go
new file mode 100644
index 0000000..f04e119
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/httpbinding/uri.go
@@ -0,0 +1,111 @@
+package httpbinding
+
+import (
+	"math"
+	"math/big"
+	"strconv"
+	"strings"
+)
+
+// URIValue is used to encode named URI parameters
+type URIValue struct {
+	path, rawPath, buffer *[]byte
+
+	key string
+}
+
+func newURIValue(path *[]byte, rawPath *[]byte, buffer *[]byte, key string) URIValue {
+	return URIValue{path: path, rawPath: rawPath, buffer: buffer, key: key}
+}
+
+func (u URIValue) modifyURI(value string) (err error) {
+	*u.path, *u.buffer, err = replacePathElement(*u.path, *u.buffer, u.key, value, false)
+	if err != nil {
+		return err
+	}
+	*u.rawPath, *u.buffer, err = replacePathElement(*u.rawPath, *u.buffer, u.key, value, true)
+	return err
+}
+
+// Boolean encodes v as a URI string value
+func (u URIValue) Boolean(v bool) error {
+	return u.modifyURI(strconv.FormatBool(v))
+}
+
+// String encodes v as a URI string value
+func (u URIValue) String(v string) error {
+	return u.modifyURI(v)
+}
+
+// Byte encodes v as a URI string value
+func (u URIValue) Byte(v int8) error {
+	return u.Long(int64(v))
+}
+
+// Short encodes v as a URI string value
+func (u URIValue) Short(v int16) error {
+	return u.Long(int64(v))
+}
+
+// Integer encodes v as a URI string value
+func (u URIValue) Integer(v int32) error {
+	return u.Long(int64(v))
+}
+
+// Long encodes v as a URI string value
+func (u URIValue) Long(v int64) error {
+	return u.modifyURI(strconv.FormatInt(v, 10))
+}
+
+// Float encodes v as a query string value
+func (u URIValue) Float(v float32) error {
+	return u.float(float64(v), 32)
+}
+
+// Double encodes v as a query string value
+func (u URIValue) Double(v float64) error {
+	return u.float(v, 64)
+}
+
+func (u URIValue) float(v float64, bitSize int) error {
+	switch {
+	case math.IsNaN(v):
+		return u.String(floatNaN)
+	case math.IsInf(v, 1):
+		return u.String(floatInfinity)
+	case math.IsInf(v, -1):
+		return u.String(floatNegInfinity)
+	default:
+		return u.modifyURI(strconv.FormatFloat(v, 'f', -1, bitSize))
+	}
+}
+
+// BigInteger encodes v as a query string value
+func (u URIValue) BigInteger(v *big.Int) error {
+	return u.modifyURI(v.String())
+}
+
+// BigDecimal encodes v as a query string value
+func (u URIValue) BigDecimal(v *big.Float) error {
+	if i, accuracy := v.Int64(); accuracy == big.Exact {
+		return u.Long(i)
+	}
+	return u.modifyURI(v.Text('e', -1))
+}
+
+// SplitURI parses a Smithy HTTP binding trait URI
+func SplitURI(uri string) (path, query string) {
+	queryStart := strings.IndexRune(uri, '?')
+	if queryStart == -1 {
+		path = uri
+		return path, query
+	}
+
+	path = uri[:queryStart]
+	if queryStart+1 >= len(uri) {
+		return path, query
+	}
+	query = uri[queryStart+1:]
+
+	return path, query
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/json/array.go b/vendor/github.com/aws/smithy-go/encoding/json/array.go
new file mode 100644
index 0000000..7a232f6
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/json/array.go
@@ -0,0 +1,35 @@
+package json
+
+import (
+	"bytes"
+)
+
+// Array represents the encoding of a JSON Array
+type Array struct {
+	w          *bytes.Buffer
+	writeComma bool
+	scratch    *[]byte
+}
+
+func newArray(w *bytes.Buffer, scratch *[]byte) *Array {
+	w.WriteRune(leftBracket)
+	return &Array{w: w, scratch: scratch}
+}
+
+// Value adds a new element to the JSON Array.
+// Returns a Value type that is used to encode
+// the array element.
+func (a *Array) Value() Value {
+	if a.writeComma {
+		a.w.WriteRune(comma)
+	} else {
+		a.writeComma = true
+	}
+
+	return newValue(a.w, a.scratch)
+}
+
+// Close encodes the end of the JSON Array
+func (a *Array) Close() {
+	a.w.WriteRune(rightBracket)
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/json/constants.go b/vendor/github.com/aws/smithy-go/encoding/json/constants.go
new file mode 100644
index 0000000..9104409
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/json/constants.go
@@ -0,0 +1,15 @@
+package json
+
+const (
+	leftBrace  = '{'
+	rightBrace = '}'
+
+	leftBracket  = '['
+	rightBracket = ']'
+
+	comma = ','
+	quote = '"'
+	colon = ':'
+
+	null = "null"
+)
diff --git a/vendor/github.com/aws/smithy-go/encoding/json/decoder_util.go b/vendor/github.com/aws/smithy-go/encoding/json/decoder_util.go
new file mode 100644
index 0000000..7050c85
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/json/decoder_util.go
@@ -0,0 +1,139 @@
+package json
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+)
+
+// DiscardUnknownField discards unknown fields from a decoder body.
+// This function is useful while deserializing a JSON body with additional
+// unknown information that should be discarded.
+func DiscardUnknownField(decoder *json.Decoder) error {
+	// This deliberately does not share logic with CollectUnknownField, even
+	// though it could, because if we were to delegate to that then we'd incur
+	// extra allocations and general memory usage.
+	v, err := decoder.Token()
+	if err == io.EOF {
+		return nil
+	}
+	if err != nil {
+		return err
+	}
+
+	if _, ok := v.(json.Delim); ok {
+		for decoder.More() {
+			err = DiscardUnknownField(decoder)
+		}
+		endToken, err := decoder.Token()
+		if err != nil {
+			return err
+		}
+		if _, ok := endToken.(json.Delim); !ok {
+			return fmt.Errorf("invalid JSON : expected json delimiter, found %T %v",
+				endToken, endToken)
+		}
+	}
+
+	return nil
+}
+
+// CollectUnknownField grabs the contents of unknown fields from the decoder body
+// and returns them as a byte slice. This is useful for skipping unknown fields without
+// completely discarding them.
+func CollectUnknownField(decoder *json.Decoder) ([]byte, error) {
+	result, err := collectUnknownField(decoder)
+	if err != nil {
+		return nil, err
+	}
+
+	buff := bytes.NewBuffer(nil)
+	encoder := json.NewEncoder(buff)
+
+	if err := encoder.Encode(result); err != nil {
+		return nil, err
+	}
+
+	return buff.Bytes(), nil
+}
+
+func collectUnknownField(decoder *json.Decoder) (interface{}, error) {
+	// Grab the initial value. This could either be a concrete value like a string or a a
+	// delimiter.
+	token, err := decoder.Token()
+	if err == io.EOF {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	// If it's an array or object, we'll need to recurse.
+	delim, ok := token.(json.Delim)
+	if ok {
+		var result interface{}
+		if delim == '{' {
+			result, err = collectUnknownObject(decoder)
+			if err != nil {
+				return nil, err
+			}
+		} else {
+			result, err = collectUnknownArray(decoder)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		// Discard the closing token. decoder.Token handles checking for matching delimiters
+		if _, err := decoder.Token(); err != nil {
+			return nil, err
+		}
+		return result, nil
+	}
+
+	return token, nil
+}
+
+func collectUnknownArray(decoder *json.Decoder) ([]interface{}, error) {
+	// We need to create an empty array here instead of a nil array, since by getting
+	// into this function at all we necessarily have seen a non-nil list.
+	array := []interface{}{}
+
+	for decoder.More() {
+		value, err := collectUnknownField(decoder)
+		if err != nil {
+			return nil, err
+		}
+		array = append(array, value)
+	}
+
+	return array, nil
+}
+
+func collectUnknownObject(decoder *json.Decoder) (map[string]interface{}, error) {
+	object := make(map[string]interface{})
+
+	for decoder.More() {
+		key, err := collectUnknownField(decoder)
+		if err != nil {
+			return nil, err
+		}
+
+		// Keys have to be strings, which is particularly important as the encoder
+		// won't except a map with interface{} keys
+		stringKey, ok := key.(string)
+		if !ok {
+			return nil, fmt.Errorf("expected string key, found %T", key)
+		}
+
+		value, err := collectUnknownField(decoder)
+		if err != nil {
+			return nil, err
+		}
+
+		object[stringKey] = value
+	}
+
+	return object, nil
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/json/encoder.go b/vendor/github.com/aws/smithy-go/encoding/json/encoder.go
new file mode 100644
index 0000000..8772953
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/json/encoder.go
@@ -0,0 +1,30 @@
+package json
+
+import (
+	"bytes"
+)
+
+// Encoder is JSON encoder that supports construction of JSON values
+// using methods.
+type Encoder struct {
+	w *bytes.Buffer
+	Value
+}
+
+// NewEncoder returns a new JSON encoder
+func NewEncoder() *Encoder {
+	writer := bytes.NewBuffer(nil)
+	scratch := make([]byte, 64)
+
+	return &Encoder{w: writer, Value: newValue(writer, &scratch)}
+}
+
+// String returns the String output of the JSON encoder
+func (e Encoder) String() string {
+	return e.w.String()
+}
+
+// Bytes returns the []byte slice of the JSON encoder
+func (e Encoder) Bytes() []byte {
+	return e.w.Bytes()
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/json/escape.go b/vendor/github.com/aws/smithy-go/encoding/json/escape.go
new file mode 100644
index 0000000..d984d0c
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/json/escape.go
@@ -0,0 +1,198 @@
+// Copyright 2016 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.
+
+// Copied and modified from Go 1.8 stdlib's encoding/json/#safeSet
+
+package json
+
+import (
+	"bytes"
+	"unicode/utf8"
+)
+
+// safeSet holds the value true if the ASCII character with the given array
+// position can be represented inside a JSON string without any further
+// escaping.
+//
+// All values are true except for the ASCII control characters (0-31), the
+// double quote ("), and the backslash character ("\").
+var safeSet = [utf8.RuneSelf]bool{
+	' ':      true,
+	'!':      true,
+	'"':      false,
+	'#':      true,
+	'$':      true,
+	'%':      true,
+	'&':      true,
+	'\'':     true,
+	'(':      true,
+	')':      true,
+	'*':      true,
+	'+':      true,
+	',':      true,
+	'-':      true,
+	'.':      true,
+	'/':      true,
+	'0':      true,
+	'1':      true,
+	'2':      true,
+	'3':      true,
+	'4':      true,
+	'5':      true,
+	'6':      true,
+	'7':      true,
+	'8':      true,
+	'9':      true,
+	':':      true,
+	';':      true,
+	'<':      true,
+	'=':      true,
+	'>':      true,
+	'?':      true,
+	'@':      true,
+	'A':      true,
+	'B':      true,
+	'C':      true,
+	'D':      true,
+	'E':      true,
+	'F':      true,
+	'G':      true,
+	'H':      true,
+	'I':      true,
+	'J':      true,
+	'K':      true,
+	'L':      true,
+	'M':      true,
+	'N':      true,
+	'O':      true,
+	'P':      true,
+	'Q':      true,
+	'R':      true,
+	'S':      true,
+	'T':      true,
+	'U':      true,
+	'V':      true,
+	'W':      true,
+	'X':      true,
+	'Y':      true,
+	'Z':      true,
+	'[':      true,
+	'\\':     false,
+	']':      true,
+	'^':      true,
+	'_':      true,
+	'`':      true,
+	'a':      true,
+	'b':      true,
+	'c':      true,
+	'd':      true,
+	'e':      true,
+	'f':      true,
+	'g':      true,
+	'h':      true,
+	'i':      true,
+	'j':      true,
+	'k':      true,
+	'l':      true,
+	'm':      true,
+	'n':      true,
+	'o':      true,
+	'p':      true,
+	'q':      true,
+	'r':      true,
+	's':      true,
+	't':      true,
+	'u':      true,
+	'v':      true,
+	'w':      true,
+	'x':      true,
+	'y':      true,
+	'z':      true,
+	'{':      true,
+	'|':      true,
+	'}':      true,
+	'~':      true,
+	'\u007f': true,
+}
+
+// copied from Go 1.8 stdlib's encoding/json/#hex
+var hex = "0123456789abcdef"
+
+// escapeStringBytes escapes and writes the passed in string bytes to the dst
+// buffer
+//
+// Copied and modifed from Go 1.8 stdlib's encodeing/json/#encodeState.stringBytes
+func escapeStringBytes(e *bytes.Buffer, s []byte) {
+	e.WriteByte('"')
+	start := 0
+	for i := 0; i < len(s); {
+		if b := s[i]; b < utf8.RuneSelf {
+			if safeSet[b] {
+				i++
+				continue
+			}
+			if start < i {
+				e.Write(s[start:i])
+			}
+			switch b {
+			case '\\', '"':
+				e.WriteByte('\\')
+				e.WriteByte(b)
+			case '\n':
+				e.WriteByte('\\')
+				e.WriteByte('n')
+			case '\r':
+				e.WriteByte('\\')
+				e.WriteByte('r')
+			case '\t':
+				e.WriteByte('\\')
+				e.WriteByte('t')
+			default:
+				// This encodes bytes < 0x20 except for \t, \n and \r.
+				// If escapeHTML is set, it also escapes <, >, and &
+				// because they can lead to security holes when
+				// user-controlled strings are rendered into JSON
+				// and served to some browsers.
+				e.WriteString(`\u00`)
+				e.WriteByte(hex[b>>4])
+				e.WriteByte(hex[b&0xF])
+			}
+			i++
+			start = i
+			continue
+		}
+		c, size := utf8.DecodeRune(s[i:])
+		if c == utf8.RuneError && size == 1 {
+			if start < i {
+				e.Write(s[start:i])
+			}
+			e.WriteString(`\ufffd`)
+			i += size
+			start = i
+			continue
+		}
+		// U+2028 is LINE SEPARATOR.
+		// U+2029 is PARAGRAPH SEPARATOR.
+		// They are both technically valid characters in JSON strings,
+		// but don't work in JSONP, which has to be evaluated as JavaScript,
+		// and can lead to security holes there. It is valid JSON to
+		// escape them, so we do so unconditionally.
+		// See http://timelessrepo.com/json-isnt-a-javascript-subset for discussion.
+		if c == '\u2028' || c == '\u2029' {
+			if start < i {
+				e.Write(s[start:i])
+			}
+			e.WriteString(`\u202`)
+			e.WriteByte(hex[c&0xF])
+			i += size
+			start = i
+			continue
+		}
+		i += size
+	}
+	if start < len(s) {
+		e.Write(s[start:])
+	}
+	e.WriteByte('"')
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/json/object.go b/vendor/github.com/aws/smithy-go/encoding/json/object.go
new file mode 100644
index 0000000..722346d
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/json/object.go
@@ -0,0 +1,40 @@
+package json
+
+import (
+	"bytes"
+)
+
+// Object represents the encoding of a JSON Object type
+type Object struct {
+	w          *bytes.Buffer
+	writeComma bool
+	scratch    *[]byte
+}
+
+func newObject(w *bytes.Buffer, scratch *[]byte) *Object {
+	w.WriteRune(leftBrace)
+	return &Object{w: w, scratch: scratch}
+}
+
+func (o *Object) writeKey(key string) {
+	escapeStringBytes(o.w, []byte(key))
+	o.w.WriteRune(colon)
+}
+
+// Key adds the given named key to the JSON object.
+// Returns a Value encoder that should be used to encode
+// a JSON value type.
+func (o *Object) Key(name string) Value {
+	if o.writeComma {
+		o.w.WriteRune(comma)
+	} else {
+		o.writeComma = true
+	}
+	o.writeKey(name)
+	return newValue(o.w, o.scratch)
+}
+
+// Close encodes the end of the JSON Object
+func (o *Object) Close() {
+	o.w.WriteRune(rightBrace)
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/json/value.go b/vendor/github.com/aws/smithy-go/encoding/json/value.go
new file mode 100644
index 0000000..b41ff1e
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/json/value.go
@@ -0,0 +1,149 @@
+package json
+
+import (
+	"bytes"
+	"encoding/base64"
+	"math/big"
+	"strconv"
+
+	"github.com/aws/smithy-go/encoding"
+)
+
+// Value represents a JSON Value type
+// JSON Value types: Object, Array, String, Number, Boolean, and Null
+type Value struct {
+	w       *bytes.Buffer
+	scratch *[]byte
+}
+
+// newValue returns a new Value encoder
+func newValue(w *bytes.Buffer, scratch *[]byte) Value {
+	return Value{w: w, scratch: scratch}
+}
+
+// String encodes v as a JSON string
+func (jv Value) String(v string) {
+	escapeStringBytes(jv.w, []byte(v))
+}
+
+// Byte encodes v as a JSON number
+func (jv Value) Byte(v int8) {
+	jv.Long(int64(v))
+}
+
+// Short encodes v as a JSON number
+func (jv Value) Short(v int16) {
+	jv.Long(int64(v))
+}
+
+// Integer encodes v as a JSON number
+func (jv Value) Integer(v int32) {
+	jv.Long(int64(v))
+}
+
+// Long encodes v as a JSON number
+func (jv Value) Long(v int64) {
+	*jv.scratch = strconv.AppendInt((*jv.scratch)[:0], v, 10)
+	jv.w.Write(*jv.scratch)
+}
+
+// ULong encodes v as a JSON number
+func (jv Value) ULong(v uint64) {
+	*jv.scratch = strconv.AppendUint((*jv.scratch)[:0], v, 10)
+	jv.w.Write(*jv.scratch)
+}
+
+// Float encodes v as a JSON number
+func (jv Value) Float(v float32) {
+	jv.float(float64(v), 32)
+}
+
+// Double encodes v as a JSON number
+func (jv Value) Double(v float64) {
+	jv.float(v, 64)
+}
+
+func (jv Value) float(v float64, bits int) {
+	*jv.scratch = encoding.EncodeFloat((*jv.scratch)[:0], v, bits)
+	jv.w.Write(*jv.scratch)
+}
+
+// Boolean encodes v as a JSON boolean
+func (jv Value) Boolean(v bool) {
+	*jv.scratch = strconv.AppendBool((*jv.scratch)[:0], v)
+	jv.w.Write(*jv.scratch)
+}
+
+// Base64EncodeBytes writes v as a base64 value in JSON string
+func (jv Value) Base64EncodeBytes(v []byte) {
+	encodeByteSlice(jv.w, (*jv.scratch)[:0], v)
+}
+
+// Write writes v directly to the JSON document
+func (jv Value) Write(v []byte) {
+	jv.w.Write(v)
+}
+
+// Array returns a new Array encoder
+func (jv Value) Array() *Array {
+	return newArray(jv.w, jv.scratch)
+}
+
+// Object returns a new Object encoder
+func (jv Value) Object() *Object {
+	return newObject(jv.w, jv.scratch)
+}
+
+// Null encodes a null JSON value
+func (jv Value) Null() {
+	jv.w.WriteString(null)
+}
+
+// BigInteger encodes v as JSON value
+func (jv Value) BigInteger(v *big.Int) {
+	jv.w.Write([]byte(v.Text(10)))
+}
+
+// BigDecimal encodes v as JSON value
+func (jv Value) BigDecimal(v *big.Float) {
+	if i, accuracy := v.Int64(); accuracy == big.Exact {
+		jv.Long(i)
+		return
+	}
+	// TODO: Should this try to match ES6 ToString similar to stdlib JSON?
+	jv.w.Write([]byte(v.Text('e', -1)))
+}
+
+// Based on encoding/json encodeByteSlice from the Go Standard Library
+// https://golang.org/src/encoding/json/encode.go
+func encodeByteSlice(w *bytes.Buffer, scratch []byte, v []byte) {
+	if v == nil {
+		w.WriteString(null)
+		return
+	}
+
+	w.WriteRune(quote)
+
+	encodedLen := base64.StdEncoding.EncodedLen(len(v))
+	if encodedLen <= len(scratch) {
+		// If the encoded bytes fit in e.scratch, avoid an extra
+		// allocation and use the cheaper Encoding.Encode.
+		dst := scratch[:encodedLen]
+		base64.StdEncoding.Encode(dst, v)
+		w.Write(dst)
+	} else if encodedLen <= 1024 {
+		// The encoded bytes are short enough to allocate for, and
+		// Encoding.Encode is still cheaper.
+		dst := make([]byte, encodedLen)
+		base64.StdEncoding.Encode(dst, v)
+		w.Write(dst)
+	} else {
+		// The encoded bytes are too long to cheaply allocate, and
+		// Encoding.Encode is no longer noticeably cheaper.
+		enc := base64.NewEncoder(base64.StdEncoding, w)
+		enc.Write(v)
+		enc.Close()
+	}
+
+	w.WriteRune(quote)
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/array.go b/vendor/github.com/aws/smithy-go/encoding/xml/array.go
new file mode 100644
index 0000000..508f3c9
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/array.go
@@ -0,0 +1,49 @@
+package xml
+
+// arrayMemberWrapper is the default member wrapper tag name for XML Array type
+var arrayMemberWrapper = StartElement{
+	Name: Name{Local: "member"},
+}
+
+// Array represents the encoding of a XML array type
+type Array struct {
+	w       writer
+	scratch *[]byte
+
+	// member start element is the array member wrapper start element
+	memberStartElement StartElement
+
+	// isFlattened indicates if the array is a flattened array.
+	isFlattened bool
+}
+
+// newArray returns an array encoder.
+// It also takes in the  member start element, array start element.
+// It takes in a isFlattened bool, indicating that an array is flattened array.
+//
+// A wrapped array ["value1", "value2"] is represented as
+// `<List><member>value1</member><member>value2</member></List>`.
+
+// A flattened array `someList: ["value1", "value2"]` is represented as
+// `<someList>value1</someList><someList>value2</someList>`.
+func newArray(w writer, scratch *[]byte, memberStartElement StartElement, arrayStartElement StartElement, isFlattened bool) *Array {
+	var memberWrapper = memberStartElement
+	if isFlattened {
+		memberWrapper = arrayStartElement
+	}
+
+	return &Array{
+		w:                  w,
+		scratch:            scratch,
+		memberStartElement: memberWrapper,
+		isFlattened:        isFlattened,
+	}
+}
+
+// Member adds a new member to the XML array.
+// It returns a Value encoder.
+func (a *Array) Member() Value {
+	v := newValue(a.w, a.scratch, a.memberStartElement)
+	v.isFlattened = a.isFlattened
+	return v
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/constants.go b/vendor/github.com/aws/smithy-go/encoding/xml/constants.go
new file mode 100644
index 0000000..ccee90a
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/constants.go
@@ -0,0 +1,10 @@
+package xml
+
+const (
+	leftAngleBracket  = '<'
+	rightAngleBracket = '>'
+	forwardSlash      = '/'
+	colon             = ':'
+	equals            = '='
+	quote             = '"'
+)
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/doc.go b/vendor/github.com/aws/smithy-go/encoding/xml/doc.go
new file mode 100644
index 0000000..f920009
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/doc.go
@@ -0,0 +1,49 @@
+/*
+Package xml holds the XMl encoder utility. This utility is written in accordance to our design to delegate to
+shape serializer function in which a xml.Value will be passed around.
+
+Resources followed: https://smithy.io/2.0/spec/protocol-traits.html#xml-bindings
+
+Member Element
+
+Member element should be used to encode xml shapes into xml elements except for flattened xml shapes. Member element
+write their own element start tag. These elements should always be closed.
+
+Flattened Element
+
+Flattened element should be used to encode shapes marked with flattened trait into xml elements. Flattened element
+do not write a start tag, and thus should not be closed.
+
+Simple types encoding
+
+All simple type methods on value such as String(), Long() etc; auto close the associated member element.
+
+Array
+
+Array returns the collection encoder. It has two modes, wrapped and flattened encoding.
+
+Wrapped arrays have two methods Array() and ArrayWithCustomName() which facilitate array member wrapping.
+By default, a wrapped array members are wrapped with `member` named start element.
+
+	<wrappedArray><member>apple</member><member>tree</member></wrappedArray>
+
+Flattened arrays rely on Value being marked as flattened.
+If a shape is marked as flattened, Array() will use the shape element name as wrapper for array elements.
+
+	<flattenedAarray>apple</flattenedArray><flattenedArray>tree</flattenedArray>
+
+Map
+
+Map is the map encoder. It has two modes, wrapped and flattened encoding.
+
+Wrapped map has Array() method, which facilitate map member wrapping.
+By default, a wrapped map members are wrapped with `entry` named start element.
+
+	<wrappedMap><entry><Key>apple</Key><Value>tree</Value></entry><entry><Key>snow</Key><Value>ice</Value></entry></wrappedMap>
+
+Flattened map rely on Value being marked as flattened.
+If a shape is marked as flattened, Map() will use the shape element name as wrapper for map entry elements.
+
+	<flattenedMap><Key>apple</Key><Value>tree</Value></flattenedMap><flattenedMap><Key>snow</Key><Value>ice</Value></flattenedMap>
+*/
+package xml
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/element.go b/vendor/github.com/aws/smithy-go/encoding/xml/element.go
new file mode 100644
index 0000000..ae84e79
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/element.go
@@ -0,0 +1,91 @@
+// Copyright 2009 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.
+
+// Copied and modified from Go 1.14 stdlib's encoding/xml
+
+package xml
+
+// A Name represents an XML name (Local) annotated
+// with a name space identifier (Space).
+// In tokens returned by Decoder.Token, the Space identifier
+// is given as a canonical URL, not the short prefix used
+// in the document being parsed.
+type Name struct {
+	Space, Local string
+}
+
+// An Attr represents an attribute in an XML element (Name=Value).
+type Attr struct {
+	Name  Name
+	Value string
+}
+
+/*
+NewAttribute returns a pointer to an attribute.
+It takes in a local name aka attribute name, and value
+representing the attribute value.
+*/
+func NewAttribute(local, value string) Attr {
+	return Attr{
+		Name: Name{
+			Local: local,
+		},
+		Value: value,
+	}
+}
+
+/*
+NewNamespaceAttribute returns a pointer to an attribute.
+It takes in a local name aka attribute name, and value
+representing the attribute value.
+
+NewNamespaceAttribute appends `xmlns:` in front of namespace
+prefix.
+
+For creating a name space attribute representing
+`xmlns:prefix="http://example.com`, the breakdown would be:
+local = "prefix"
+value = "http://example.com"
+*/
+func NewNamespaceAttribute(local, value string) Attr {
+	attr := NewAttribute(local, value)
+
+	// default name space identifier
+	attr.Name.Space = "xmlns"
+	return attr
+}
+
+// A StartElement represents an XML start element.
+type StartElement struct {
+	Name Name
+	Attr []Attr
+}
+
+// Copy creates a new copy of StartElement.
+func (e StartElement) Copy() StartElement {
+	attrs := make([]Attr, len(e.Attr))
+	copy(attrs, e.Attr)
+	e.Attr = attrs
+	return e
+}
+
+// End returns the corresponding XML end element.
+func (e StartElement) End() EndElement {
+	return EndElement{e.Name}
+}
+
+// returns true if start element local name is empty
+func (e StartElement) isZero() bool {
+	return len(e.Name.Local) == 0
+}
+
+// An EndElement represents an XML end element.
+type EndElement struct {
+	Name Name
+}
+
+// returns true if end element local name is empty
+func (e EndElement) isZero() bool {
+	return len(e.Name.Local) == 0
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/encoder.go b/vendor/github.com/aws/smithy-go/encoding/xml/encoder.go
new file mode 100644
index 0000000..16fb3dd
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/encoder.go
@@ -0,0 +1,51 @@
+package xml
+
+// writer interface used by the xml encoder to write an encoded xml
+// document in a writer.
+type writer interface {
+
+	// Write takes in a byte slice and returns number of bytes written and error
+	Write(p []byte) (n int, err error)
+
+	// WriteRune takes in a rune and returns number of bytes written and error
+	WriteRune(r rune) (n int, err error)
+
+	// WriteString takes in a string and returns number of bytes written and error
+	WriteString(s string) (n int, err error)
+
+	// String method returns a string
+	String() string
+
+	// Bytes return a byte slice.
+	Bytes() []byte
+}
+
+// Encoder is an XML encoder that supports construction of XML values
+// using methods. The encoder takes in a writer and maintains a scratch buffer.
+type Encoder struct {
+	w       writer
+	scratch *[]byte
+}
+
+// NewEncoder returns an XML encoder
+func NewEncoder(w writer) *Encoder {
+	scratch := make([]byte, 64)
+
+	return &Encoder{w: w, scratch: &scratch}
+}
+
+// String returns the string output of the XML encoder
+func (e Encoder) String() string {
+	return e.w.String()
+}
+
+// Bytes returns the []byte slice of the XML encoder
+func (e Encoder) Bytes() []byte {
+	return e.w.Bytes()
+}
+
+// RootElement builds a root element encoding
+// It writes it's start element tag. The value should be closed.
+func (e Encoder) RootElement(element StartElement) Value {
+	return newValue(e.w, e.scratch, element)
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/error_utils.go b/vendor/github.com/aws/smithy-go/encoding/xml/error_utils.go
new file mode 100644
index 0000000..f3db6cc
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/error_utils.go
@@ -0,0 +1,51 @@
+package xml
+
+import (
+	"encoding/xml"
+	"fmt"
+	"io"
+)
+
+// ErrorComponents represents the error response fields
+// that will be deserialized from an xml error response body
+type ErrorComponents struct {
+	Code    string
+	Message string
+}
+
+// GetErrorResponseComponents returns the error fields from an xml error response body
+func GetErrorResponseComponents(r io.Reader, noErrorWrapping bool) (ErrorComponents, error) {
+	if noErrorWrapping {
+		var errResponse noWrappedErrorResponse
+		if err := xml.NewDecoder(r).Decode(&errResponse); err != nil && err != io.EOF {
+			return ErrorComponents{}, fmt.Errorf("error while deserializing xml error response: %w", err)
+		}
+		return ErrorComponents{
+			Code:    errResponse.Code,
+			Message: errResponse.Message,
+		}, nil
+	}
+
+	var errResponse wrappedErrorResponse
+	if err := xml.NewDecoder(r).Decode(&errResponse); err != nil && err != io.EOF {
+		return ErrorComponents{}, fmt.Errorf("error while deserializing xml error response: %w", err)
+	}
+	return ErrorComponents{
+		Code:    errResponse.Code,
+		Message: errResponse.Message,
+	}, nil
+}
+
+// noWrappedErrorResponse represents the error response body with
+// no internal <Error></Error wrapping
+type noWrappedErrorResponse struct {
+	Code    string `xml:"Code"`
+	Message string `xml:"Message"`
+}
+
+// wrappedErrorResponse represents the error response body
+// wrapped within <Error>...</Error>
+type wrappedErrorResponse struct {
+	Code    string `xml:"Error>Code"`
+	Message string `xml:"Error>Message"`
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/escape.go b/vendor/github.com/aws/smithy-go/encoding/xml/escape.go
new file mode 100644
index 0000000..1c5479a
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/escape.go
@@ -0,0 +1,137 @@
+// Copyright 2009 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.
+
+// Copied and modified from Go 1.14 stdlib's encoding/xml
+
+package xml
+
+import (
+	"unicode/utf8"
+)
+
+// Copied from Go 1.14 stdlib's encoding/xml
+var (
+	escQuot = []byte("&#34;") // shorter than "&quot;"
+	escApos = []byte("&#39;") // shorter than "&apos;"
+	escAmp  = []byte("&amp;")
+	escLT   = []byte("&lt;")
+	escGT   = []byte("&gt;")
+	escTab  = []byte("&#x9;")
+	escNL   = []byte("&#xA;")
+	escCR   = []byte("&#xD;")
+	escFFFD = []byte("\uFFFD") // Unicode replacement character
+
+	// Additional Escapes
+	escNextLine = []byte("&#x85;")
+	escLS       = []byte("&#x2028;")
+)
+
+// Decide whether the given rune is in the XML Character Range, per
+// the Char production of https://www.xml.com/axml/testaxml.htm,
+// Section 2.2 Characters.
+func isInCharacterRange(r rune) (inrange bool) {
+	return r == 0x09 ||
+		r == 0x0A ||
+		r == 0x0D ||
+		r >= 0x20 && r <= 0xD7FF ||
+		r >= 0xE000 && r <= 0xFFFD ||
+		r >= 0x10000 && r <= 0x10FFFF
+}
+
+// TODO: When do we need to escape the string?
+// Based on encoding/xml escapeString from the Go Standard Library.
+// https://golang.org/src/encoding/xml/xml.go
+func escapeString(e writer, s string) {
+	var esc []byte
+	last := 0
+	for i := 0; i < len(s); {
+		r, width := utf8.DecodeRuneInString(s[i:])
+		i += width
+		switch r {
+		case '"':
+			esc = escQuot
+		case '\'':
+			esc = escApos
+		case '&':
+			esc = escAmp
+		case '<':
+			esc = escLT
+		case '>':
+			esc = escGT
+		case '\t':
+			esc = escTab
+		case '\n':
+			esc = escNL
+		case '\r':
+			esc = escCR
+		case '\u0085':
+			// Not escaped by stdlib
+			esc = escNextLine
+		case '\u2028':
+			// Not escaped by stdlib
+			esc = escLS
+		default:
+			if !isInCharacterRange(r) || (r == 0xFFFD && width == 1) {
+				esc = escFFFD
+				break
+			}
+			continue
+		}
+		e.WriteString(s[last : i-width])
+		e.Write(esc)
+		last = i
+	}
+	e.WriteString(s[last:])
+}
+
+// escapeText writes to w the properly escaped XML equivalent
+// of the plain text data s. If escapeNewline is true, newline
+// characters will be escaped.
+//
+// Based on encoding/xml escapeText from the Go Standard Library.
+// https://golang.org/src/encoding/xml/xml.go
+func escapeText(e writer, s []byte) {
+	var esc []byte
+	last := 0
+	for i := 0; i < len(s); {
+		r, width := utf8.DecodeRune(s[i:])
+		i += width
+		switch r {
+		case '"':
+			esc = escQuot
+		case '\'':
+			esc = escApos
+		case '&':
+			esc = escAmp
+		case '<':
+			esc = escLT
+		case '>':
+			esc = escGT
+		case '\t':
+			esc = escTab
+		case '\n':
+			// This always escapes newline, which is different than stdlib's optional
+			// escape of new line.
+			esc = escNL
+		case '\r':
+			esc = escCR
+		case '\u0085':
+			// Not escaped by stdlib
+			esc = escNextLine
+		case '\u2028':
+			// Not escaped by stdlib
+			esc = escLS
+		default:
+			if !isInCharacterRange(r) || (r == 0xFFFD && width == 1) {
+				esc = escFFFD
+				break
+			}
+			continue
+		}
+		e.Write(s[last : i-width])
+		e.Write(esc)
+		last = i
+	}
+	e.Write(s[last:])
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/map.go b/vendor/github.com/aws/smithy-go/encoding/xml/map.go
new file mode 100644
index 0000000..e428589
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/map.go
@@ -0,0 +1,53 @@
+package xml
+
+// mapEntryWrapper is the default member wrapper start element for XML Map entry
+var mapEntryWrapper = StartElement{
+	Name: Name{Local: "entry"},
+}
+
+// Map represents the encoding of a XML map type
+type Map struct {
+	w       writer
+	scratch *[]byte
+
+	// member start element is the map entry wrapper start element
+	memberStartElement StartElement
+
+	// isFlattened returns true if the map is a flattened map
+	isFlattened bool
+}
+
+// newMap returns a map encoder which sets the default map
+// entry wrapper to `entry`.
+//
+// A map `someMap : {{key:"abc", value:"123"}}` is represented as
+// `<someMap><entry><key>abc<key><value>123</value></entry></someMap>`.
+func newMap(w writer, scratch *[]byte) *Map {
+	return &Map{
+		w:                  w,
+		scratch:            scratch,
+		memberStartElement: mapEntryWrapper,
+	}
+}
+
+// newFlattenedMap returns a map encoder which sets the map
+// entry wrapper to the passed in memberWrapper`.
+//
+// A flattened map `someMap : {{key:"abc", value:"123"}}` is represented as
+// `<someMap><key>abc<key><value>123</value></someMap>`.
+func newFlattenedMap(w writer, scratch *[]byte, memberWrapper StartElement) *Map {
+	return &Map{
+		w:                  w,
+		scratch:            scratch,
+		memberStartElement: memberWrapper,
+		isFlattened:        true,
+	}
+}
+
+// Entry returns a Value encoder with map's element.
+// It writes the member wrapper start tag for each entry.
+func (m *Map) Entry() Value {
+	v := newValue(m.w, m.scratch, m.memberStartElement)
+	v.isFlattened = m.isFlattened
+	return v
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/value.go b/vendor/github.com/aws/smithy-go/encoding/xml/value.go
new file mode 100644
index 0000000..09434b2
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/value.go
@@ -0,0 +1,302 @@
+package xml
+
+import (
+	"encoding/base64"
+	"fmt"
+	"math/big"
+	"strconv"
+
+	"github.com/aws/smithy-go/encoding"
+)
+
+// Value represents an XML Value type
+// XML Value types: Object, Array, Map, String, Number, Boolean.
+type Value struct {
+	w       writer
+	scratch *[]byte
+
+	// xml start element is the associated start element for the Value
+	startElement StartElement
+
+	// indicates if the Value represents a flattened shape
+	isFlattened bool
+}
+
+// newFlattenedValue returns a Value encoder. newFlattenedValue does NOT write the start element tag
+func newFlattenedValue(w writer, scratch *[]byte, startElement StartElement) Value {
+	return Value{
+		w:            w,
+		scratch:      scratch,
+		startElement: startElement,
+	}
+}
+
+// newValue writes the start element xml tag and returns a Value
+func newValue(w writer, scratch *[]byte, startElement StartElement) Value {
+	writeStartElement(w, startElement)
+	return Value{w: w, scratch: scratch, startElement: startElement}
+}
+
+// writeStartElement takes in a start element and writes it.
+// It handles namespace, attributes in start element.
+func writeStartElement(w writer, el StartElement) error {
+	if el.isZero() {
+		return fmt.Errorf("xml start element cannot be nil")
+	}
+
+	w.WriteRune(leftAngleBracket)
+
+	if len(el.Name.Space) != 0 {
+		escapeString(w, el.Name.Space)
+		w.WriteRune(colon)
+	}
+	escapeString(w, el.Name.Local)
+	for _, attr := range el.Attr {
+		w.WriteRune(' ')
+		writeAttribute(w, &attr)
+	}
+
+	w.WriteRune(rightAngleBracket)
+	return nil
+}
+
+// writeAttribute writes an attribute from a provided Attribute
+// For a namespace attribute, the attr.Name.Space must be defined as "xmlns".
+// https://www.w3.org/TR/REC-xml-names/#NT-DefaultAttName
+func writeAttribute(w writer, attr *Attr) {
+	// if local, space both are not empty
+	if len(attr.Name.Space) != 0 && len(attr.Name.Local) != 0 {
+		escapeString(w, attr.Name.Space)
+		w.WriteRune(colon)
+	}
+
+	// if prefix is empty, the default `xmlns` space should be used as prefix.
+	if len(attr.Name.Local) == 0 {
+		attr.Name.Local = attr.Name.Space
+	}
+
+	escapeString(w, attr.Name.Local)
+	w.WriteRune(equals)
+	w.WriteRune(quote)
+	escapeString(w, attr.Value)
+	w.WriteRune(quote)
+}
+
+// writeEndElement takes in a end element and writes it.
+func writeEndElement(w writer, el EndElement) error {
+	if el.isZero() {
+		return fmt.Errorf("xml end element cannot be nil")
+	}
+
+	w.WriteRune(leftAngleBracket)
+	w.WriteRune(forwardSlash)
+
+	if len(el.Name.Space) != 0 {
+		escapeString(w, el.Name.Space)
+		w.WriteRune(colon)
+	}
+	escapeString(w, el.Name.Local)
+	w.WriteRune(rightAngleBracket)
+
+	return nil
+}
+
+// String encodes v as a XML string.
+// It will auto close the parent xml element tag.
+func (xv Value) String(v string) {
+	escapeString(xv.w, v)
+	xv.Close()
+}
+
+// Byte encodes v as a XML number.
+// It will auto close the parent xml element tag.
+func (xv Value) Byte(v int8) {
+	xv.Long(int64(v))
+}
+
+// Short encodes v as a XML number.
+// It will auto close the parent xml element tag.
+func (xv Value) Short(v int16) {
+	xv.Long(int64(v))
+}
+
+// Integer encodes v as a XML number.
+// It will auto close the parent xml element tag.
+func (xv Value) Integer(v int32) {
+	xv.Long(int64(v))
+}
+
+// Long encodes v as a XML number.
+// It will auto close the parent xml element tag.
+func (xv Value) Long(v int64) {
+	*xv.scratch = strconv.AppendInt((*xv.scratch)[:0], v, 10)
+	xv.w.Write(*xv.scratch)
+
+	xv.Close()
+}
+
+// Float encodes v as a XML number.
+// It will auto close the parent xml element tag.
+func (xv Value) Float(v float32) {
+	xv.float(float64(v), 32)
+	xv.Close()
+}
+
+// Double encodes v as a XML number.
+// It will auto close the parent xml element tag.
+func (xv Value) Double(v float64) {
+	xv.float(v, 64)
+	xv.Close()
+}
+
+func (xv Value) float(v float64, bits int) {
+	*xv.scratch = encoding.EncodeFloat((*xv.scratch)[:0], v, bits)
+	xv.w.Write(*xv.scratch)
+}
+
+// Boolean encodes v as a XML boolean.
+// It will auto close the parent xml element tag.
+func (xv Value) Boolean(v bool) {
+	*xv.scratch = strconv.AppendBool((*xv.scratch)[:0], v)
+	xv.w.Write(*xv.scratch)
+
+	xv.Close()
+}
+
+// Base64EncodeBytes writes v as a base64 value in XML string.
+// It will auto close the parent xml element tag.
+func (xv Value) Base64EncodeBytes(v []byte) {
+	encodeByteSlice(xv.w, (*xv.scratch)[:0], v)
+	xv.Close()
+}
+
+// BigInteger encodes v big.Int as XML value.
+// It will auto close the parent xml element tag.
+func (xv Value) BigInteger(v *big.Int) {
+	xv.w.Write([]byte(v.Text(10)))
+	xv.Close()
+}
+
+// BigDecimal encodes v big.Float as XML value.
+// It will auto close the parent xml element tag.
+func (xv Value) BigDecimal(v *big.Float) {
+	if i, accuracy := v.Int64(); accuracy == big.Exact {
+		xv.Long(i)
+		return
+	}
+
+	xv.w.Write([]byte(v.Text('e', -1)))
+	xv.Close()
+}
+
+// Write writes v directly to the xml document
+// if escapeXMLText is set to true, write will escape text.
+// It will auto close the parent xml element tag.
+func (xv Value) Write(v []byte, escapeXMLText bool) {
+	// escape and write xml text
+	if escapeXMLText {
+		escapeText(xv.w, v)
+	} else {
+		// write xml directly
+		xv.w.Write(v)
+	}
+
+	xv.Close()
+}
+
+// MemberElement does member element encoding. It returns a Value.
+// Member Element method should be used for all shapes except flattened shapes.
+//
+// A call to MemberElement will write nested element tags directly using the
+// provided start element. The value returned by MemberElement should be closed.
+func (xv Value) MemberElement(element StartElement) Value {
+	return newValue(xv.w, xv.scratch, element)
+}
+
+// FlattenedElement returns flattened element encoding. It returns a Value.
+// This method should be used for flattened shapes.
+//
+// Unlike MemberElement, flattened element will NOT write element tags
+// directly for the associated start element.
+//
+// The value returned by the FlattenedElement does not need to be closed.
+func (xv Value) FlattenedElement(element StartElement) Value {
+	v := newFlattenedValue(xv.w, xv.scratch, element)
+	v.isFlattened = true
+	return v
+}
+
+// Array returns an array encoder. By default, the members of array are
+// wrapped with `<member>` element tag.
+// If value is marked as flattened, the start element is used to wrap the members instead of
+// the `<member>` element.
+func (xv Value) Array() *Array {
+	return newArray(xv.w, xv.scratch, arrayMemberWrapper, xv.startElement, xv.isFlattened)
+}
+
+/*
+ArrayWithCustomName returns an array encoder.
+
+It takes named start element as an argument, the named start element will used to wrap xml array entries.
+for eg, `<someList><customName>entry1</customName></someList>`
+Here `customName` named start element will be wrapped on each array member.
+*/
+func (xv Value) ArrayWithCustomName(element StartElement) *Array {
+	return newArray(xv.w, xv.scratch, element, xv.startElement, xv.isFlattened)
+}
+
+/*
+Map returns a map encoder. By default, the map entries are
+wrapped with `<entry>` element tag.
+
+If value is marked as flattened, the start element is used to wrap the entry instead of
+the `<member>` element.
+*/
+func (xv Value) Map() *Map {
+	// flattened map
+	if xv.isFlattened {
+		return newFlattenedMap(xv.w, xv.scratch, xv.startElement)
+	}
+
+	// un-flattened map
+	return newMap(xv.w, xv.scratch)
+}
+
+// encodeByteSlice is modified copy of json encoder's encodeByteSlice.
+// It is used to base64 encode a byte slice.
+func encodeByteSlice(w writer, scratch []byte, v []byte) {
+	if v == nil {
+		return
+	}
+
+	encodedLen := base64.StdEncoding.EncodedLen(len(v))
+	if encodedLen <= len(scratch) {
+		// If the encoded bytes fit in e.scratch, avoid an extra
+		// allocation and use the cheaper Encoding.Encode.
+		dst := scratch[:encodedLen]
+		base64.StdEncoding.Encode(dst, v)
+		w.Write(dst)
+	} else if encodedLen <= 1024 {
+		// The encoded bytes are short enough to allocate for, and
+		// Encoding.Encode is still cheaper.
+		dst := make([]byte, encodedLen)
+		base64.StdEncoding.Encode(dst, v)
+		w.Write(dst)
+	} else {
+		// The encoded bytes are too long to cheaply allocate, and
+		// Encoding.Encode is no longer noticeably cheaper.
+		enc := base64.NewEncoder(base64.StdEncoding, w)
+		enc.Write(v)
+		enc.Close()
+	}
+}
+
+// IsFlattened returns true if value is for flattened shape.
+func (xv Value) IsFlattened() bool {
+	return xv.isFlattened
+}
+
+// Close closes the value.
+func (xv Value) Close() {
+	writeEndElement(xv.w, xv.startElement.End())
+}
diff --git a/vendor/github.com/aws/smithy-go/encoding/xml/xml_decoder.go b/vendor/github.com/aws/smithy-go/encoding/xml/xml_decoder.go
new file mode 100644
index 0000000..dc4eebd
--- /dev/null
+++ b/vendor/github.com/aws/smithy-go/encoding/xml/xml_decoder.go
@@ -0,0 +1,154 @@
+package xml
+
+import (
+	"encoding/xml"
+	"fmt"
+	"strings"
+)
+
+// NodeDecoder is a XML decoder wrapper that is responsible to decoding
+// a single XML Node element and it's nested member elements. This wrapper decoder
+// takes in the start element of the top level node being decoded.
+type NodeDecoder struct {
+	Decoder *xml.Decoder
+	StartEl xml.StartElement
+}
+
+// WrapNodeDecoder returns an initialized XMLNodeDecoder
+func WrapNodeDecoder(decoder *xml.Decoder, startEl xml.StartElement) NodeDecoder {
+	return NodeDecoder{
+		Decoder: decoder,
+		StartEl: startEl,
+	}
+}
+
+// Token on a Node Decoder returns a xml StartElement. It returns a boolean that indicates the
+// a token is the node decoder's end node token; and an error which indicates any error
+// that occurred while retrieving the start element
+func (d NodeDecoder) Token() (t xml.StartElement, done bool, err error) {
+	for {
+		token, e := d.Decoder.Token()
+		if e != nil {
+			return t, done, e
+		}
+
+		// check if we reach end of the node being decoded
+		if el, ok := token.(xml.EndElement); ok {
+			return t, el == d.StartEl.End(), err
+		}
+
+		if t, ok := token.(xml.StartElement); ok {
+			return restoreAttrNamespaces(t), false, err
+		}
+
+		// skip token if it is a comment or preamble or empty space value due to indentation
+		// or if it's a value and is not expected
+	}
+}
+
+// restoreAttrNamespaces update XML attributes to restore the short namespaces found within
+// the raw XML document.
+func restoreAttrNamespaces(node xml.StartElement) xml.StartElement {
+	if len(node.Attr) == 0 {
+		return node
+	}
+
+	// Generate a mapping of XML namespace values to their short names.
+	ns := map[string]string{}
+	for _, a := range node.Attr {
+		if a.Name.Space == "xmlns" {
+			ns[a.Value] = a.Name.Local
+			break
+		}
+	}
+
+	for i, a := range node.Attr {
+		if a.Name.Space == "xmlns" {
+			continue
+		}
+		// By default, xml.Decoder will fully resolve these namespaces. So if you had <foo xmlns:bar=baz bar:bin=hi/>
+		// then by default the second attribute would have the `Name.Space` resolved to `baz`. But we need it to
+		// continue to resolve as `bar` so we can easily identify it later on.
+		if v, ok := ns[node.Attr[i].Name.Space]; ok {
+			node.Attr[i].Name.Space = v
+		}
+	}
+	return node
+}
+
+// GetElement looks for the given tag name at the current level, and returns the element if found, and
+// skipping over non-matching elements. Returns an error if the node is not found, or if an error occurs while walking
+// the document.
+func (d NodeDecoder) GetElement(name string) (t xml.StartElement, err error) {
+	for {
+		token, done, err := d.Token()
+		if err != nil {
+			return t, err
+		}
+		if done {
+			return t, fmt.Errorf("%s node not found", name)
+		}
+		switch {
+		case strings.EqualFold(name, token.Name.Local):
+			return token, nil
+		default:
+			err = d.Decoder.Skip()
+			if err != nil {
+				return t, err
+			}
+		}
+	}
+}
+
+// Value provides an abstraction to retrieve char data value within an xml element.
+// The method will return an error if it encounters a nested xml element instead of char data.
+// This method should only be used to retrieve simple type or blob shape values as []byte.
+func (d NodeDecoder) Value() (c []byte, err error) {
+	t, e := d.Decoder.Token()
+	if e != nil {
+		return c, e
+	}
+
+	endElement := d.StartEl.End()
+
+	switch ev := t.(type) {
+	case xml.CharData:
+		c = ev.Copy()
+	case xml.EndElement: // end tag or self-closing
+		if ev == endElement {
+			return []byte{}, err
+		}
+		return c, fmt.Errorf("expected value for %v element, got %T type %v instead", d.StartEl.Name.Local, t, t)
+	default:
+		return c, fmt.Errorf("expected value for %v element, got %T type %v instead", d.StartEl.Name.Local, t, t)
+	}
+
+	t, e = d.Decoder.Token()
+	if e != nil {
+		return c, e
+	}
+
+	if ev, ok := t.(xml.EndElement); ok {
+		if ev == endElement {
+			return c, err
+		}
+	}
+
+	return c, fmt.Errorf("expected end element %v, got %T type %v instead", endElement, t, t)
+}
+
+// FetchRootElement takes in a decoder and returns the first start element within the xml body.
+// This function is useful in fetching the start element of an XML response and ignore the
+// comments and preamble
+func FetchRootElement(decoder *xml.Decoder) (startElement xml.StartElement, err error) {
+	for {
+		t, e := decoder.Token()
+		if e != nil {
+			return startElement, e
+		}
+
+		if startElement, ok := t.(xml.StartElement); ok {
+			return startElement, err
+		}
+	}
+}