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auth.go (8291B)

      1 // Code generated by smithy-go-codegen DO NOT EDIT.
      2 
      3 package route53
      4 
      5 import (
      6 	"context"
      7 	"fmt"
      8 	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
      9 	smithy "github.com/aws/smithy-go"
     10 	smithyauth "github.com/aws/smithy-go/auth"
     11 	"github.com/aws/smithy-go/middleware"
     12 	smithyhttp "github.com/aws/smithy-go/transport/http"
     13 )
     14 
     15 func bindAuthParamsRegion(params *AuthResolverParameters, _ interface{}, options Options) {
     16 	params.Region = options.Region
     17 }
     18 
     19 type setLegacyContextSigningOptionsMiddleware struct {
     20 }
     21 
     22 func (*setLegacyContextSigningOptionsMiddleware) ID() string {
     23 	return "setLegacyContextSigningOptions"
     24 }
     25 
     26 func (m *setLegacyContextSigningOptionsMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
     27 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
     28 ) {
     29 	rscheme := getResolvedAuthScheme(ctx)
     30 	schemeID := rscheme.Scheme.SchemeID()
     31 
     32 	if sn := awsmiddleware.GetSigningName(ctx); sn != "" {
     33 		if schemeID == "aws.auth#sigv4" {
     34 			smithyhttp.SetSigV4SigningName(&rscheme.SignerProperties, sn)
     35 		} else if schemeID == "aws.auth#sigv4a" {
     36 			smithyhttp.SetSigV4ASigningName(&rscheme.SignerProperties, sn)
     37 		}
     38 	}
     39 
     40 	if sr := awsmiddleware.GetSigningRegion(ctx); sr != "" {
     41 		if schemeID == "aws.auth#sigv4" {
     42 			smithyhttp.SetSigV4SigningRegion(&rscheme.SignerProperties, sr)
     43 		} else if schemeID == "aws.auth#sigv4a" {
     44 			smithyhttp.SetSigV4ASigningRegions(&rscheme.SignerProperties, []string{sr})
     45 		}
     46 	}
     47 
     48 	return next.HandleFinalize(ctx, in)
     49 }
     50 
     51 func addSetLegacyContextSigningOptionsMiddleware(stack *middleware.Stack) error {
     52 	return stack.Finalize.Insert(&setLegacyContextSigningOptionsMiddleware{}, "Signing", middleware.Before)
     53 }
     54 
     55 type withAnonymous struct {
     56 	resolver AuthSchemeResolver
     57 }
     58 
     59 var _ AuthSchemeResolver = (*withAnonymous)(nil)
     60 
     61 func (v *withAnonymous) ResolveAuthSchemes(ctx context.Context, params *AuthResolverParameters) ([]*smithyauth.Option, error) {
     62 	opts, err := v.resolver.ResolveAuthSchemes(ctx, params)
     63 	if err != nil {
     64 		return nil, err
     65 	}
     66 
     67 	opts = append(opts, &smithyauth.Option{
     68 		SchemeID: smithyauth.SchemeIDAnonymous,
     69 	})
     70 	return opts, nil
     71 }
     72 
     73 func wrapWithAnonymousAuth(options *Options) {
     74 	if _, ok := options.AuthSchemeResolver.(*defaultAuthSchemeResolver); !ok {
     75 		return
     76 	}
     77 
     78 	options.AuthSchemeResolver = &withAnonymous{
     79 		resolver: options.AuthSchemeResolver,
     80 	}
     81 }
     82 
     83 // AuthResolverParameters contains the set of inputs necessary for auth scheme
     84 // resolution.
     85 type AuthResolverParameters struct {
     86 	// The name of the operation being invoked.
     87 	Operation string
     88 
     89 	// The region in which the operation is being invoked.
     90 	Region string
     91 }
     92 
     93 func bindAuthResolverParams(operation string, input interface{}, options Options) *AuthResolverParameters {
     94 	params := &AuthResolverParameters{
     95 		Operation: operation,
     96 	}
     97 
     98 	bindAuthParamsRegion(params, input, options)
     99 
    100 	return params
    101 }
    102 
    103 // AuthSchemeResolver returns a set of possible authentication options for an
    104 // operation.
    105 type AuthSchemeResolver interface {
    106 	ResolveAuthSchemes(context.Context, *AuthResolverParameters) ([]*smithyauth.Option, error)
    107 }
    108 
    109 type defaultAuthSchemeResolver struct{}
    110 
    111 var _ AuthSchemeResolver = (*defaultAuthSchemeResolver)(nil)
    112 
    113 func (*defaultAuthSchemeResolver) ResolveAuthSchemes(ctx context.Context, params *AuthResolverParameters) ([]*smithyauth.Option, error) {
    114 	if overrides, ok := operationAuthOptions[params.Operation]; ok {
    115 		return overrides(params), nil
    116 	}
    117 	return serviceAuthOptions(params), nil
    118 }
    119 
    120 var operationAuthOptions = map[string]func(*AuthResolverParameters) []*smithyauth.Option{}
    121 
    122 func serviceAuthOptions(params *AuthResolverParameters) []*smithyauth.Option {
    123 	return []*smithyauth.Option{
    124 		{
    125 			SchemeID: smithyauth.SchemeIDSigV4,
    126 			SignerProperties: func() smithy.Properties {
    127 				var props smithy.Properties
    128 				smithyhttp.SetSigV4SigningName(&props, "route53")
    129 				smithyhttp.SetSigV4SigningRegion(&props, params.Region)
    130 				return props
    131 			}(),
    132 		},
    133 	}
    134 }
    135 
    136 type resolveAuthSchemeMiddleware struct {
    137 	operation string
    138 	options   Options
    139 }
    140 
    141 func (*resolveAuthSchemeMiddleware) ID() string {
    142 	return "ResolveAuthScheme"
    143 }
    144 
    145 func (m *resolveAuthSchemeMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    146 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    147 ) {
    148 	params := bindAuthResolverParams(m.operation, getOperationInput(ctx), m.options)
    149 	options, err := m.options.AuthSchemeResolver.ResolveAuthSchemes(ctx, params)
    150 	if err != nil {
    151 		return out, metadata, fmt.Errorf("resolve auth scheme: %w", err)
    152 	}
    153 
    154 	scheme, ok := m.selectScheme(options)
    155 	if !ok {
    156 		return out, metadata, fmt.Errorf("could not select an auth scheme")
    157 	}
    158 
    159 	ctx = setResolvedAuthScheme(ctx, scheme)
    160 	return next.HandleFinalize(ctx, in)
    161 }
    162 
    163 func (m *resolveAuthSchemeMiddleware) selectScheme(options []*smithyauth.Option) (*resolvedAuthScheme, bool) {
    164 	for _, option := range options {
    165 		if option.SchemeID == smithyauth.SchemeIDAnonymous {
    166 			return newResolvedAuthScheme(smithyhttp.NewAnonymousScheme(), option), true
    167 		}
    168 
    169 		for _, scheme := range m.options.AuthSchemes {
    170 			if scheme.SchemeID() != option.SchemeID {
    171 				continue
    172 			}
    173 
    174 			if scheme.IdentityResolver(m.options) != nil {
    175 				return newResolvedAuthScheme(scheme, option), true
    176 			}
    177 		}
    178 	}
    179 
    180 	return nil, false
    181 }
    182 
    183 type resolvedAuthSchemeKey struct{}
    184 
    185 type resolvedAuthScheme struct {
    186 	Scheme             smithyhttp.AuthScheme
    187 	IdentityProperties smithy.Properties
    188 	SignerProperties   smithy.Properties
    189 }
    190 
    191 func newResolvedAuthScheme(scheme smithyhttp.AuthScheme, option *smithyauth.Option) *resolvedAuthScheme {
    192 	return &resolvedAuthScheme{
    193 		Scheme:             scheme,
    194 		IdentityProperties: option.IdentityProperties,
    195 		SignerProperties:   option.SignerProperties,
    196 	}
    197 }
    198 
    199 func setResolvedAuthScheme(ctx context.Context, scheme *resolvedAuthScheme) context.Context {
    200 	return middleware.WithStackValue(ctx, resolvedAuthSchemeKey{}, scheme)
    201 }
    202 
    203 func getResolvedAuthScheme(ctx context.Context) *resolvedAuthScheme {
    204 	v, _ := middleware.GetStackValue(ctx, resolvedAuthSchemeKey{}).(*resolvedAuthScheme)
    205 	return v
    206 }
    207 
    208 type getIdentityMiddleware struct {
    209 	options Options
    210 }
    211 
    212 func (*getIdentityMiddleware) ID() string {
    213 	return "GetIdentity"
    214 }
    215 
    216 func (m *getIdentityMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    217 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    218 ) {
    219 	rscheme := getResolvedAuthScheme(ctx)
    220 	if rscheme == nil {
    221 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    222 	}
    223 
    224 	resolver := rscheme.Scheme.IdentityResolver(m.options)
    225 	if resolver == nil {
    226 		return out, metadata, fmt.Errorf("no identity resolver")
    227 	}
    228 
    229 	identity, err := resolver.GetIdentity(ctx, rscheme.IdentityProperties)
    230 	if err != nil {
    231 		return out, metadata, fmt.Errorf("get identity: %w", err)
    232 	}
    233 
    234 	ctx = setIdentity(ctx, identity)
    235 	return next.HandleFinalize(ctx, in)
    236 }
    237 
    238 type identityKey struct{}
    239 
    240 func setIdentity(ctx context.Context, identity smithyauth.Identity) context.Context {
    241 	return middleware.WithStackValue(ctx, identityKey{}, identity)
    242 }
    243 
    244 func getIdentity(ctx context.Context) smithyauth.Identity {
    245 	v, _ := middleware.GetStackValue(ctx, identityKey{}).(smithyauth.Identity)
    246 	return v
    247 }
    248 
    249 type signRequestMiddleware struct {
    250 }
    251 
    252 func (*signRequestMiddleware) ID() string {
    253 	return "Signing"
    254 }
    255 
    256 func (m *signRequestMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    257 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    258 ) {
    259 	req, ok := in.Request.(*smithyhttp.Request)
    260 	if !ok {
    261 		return out, metadata, fmt.Errorf("unexpected transport type %T", in.Request)
    262 	}
    263 
    264 	rscheme := getResolvedAuthScheme(ctx)
    265 	if rscheme == nil {
    266 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    267 	}
    268 
    269 	identity := getIdentity(ctx)
    270 	if identity == nil {
    271 		return out, metadata, fmt.Errorf("no identity")
    272 	}
    273 
    274 	signer := rscheme.Scheme.Signer()
    275 	if signer == nil {
    276 		return out, metadata, fmt.Errorf("no signer")
    277 	}
    278 
    279 	if err := signer.SignRequest(ctx, req, identity, rscheme.SignerProperties); err != nil {
    280 		return out, metadata, fmt.Errorf("sign request: %w", err)
    281 	}
    282 
    283 	return next.HandleFinalize(ctx, in)
    284 }