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auth.go (9945B)

      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/metrics"
     12 	"github.com/aws/smithy-go/middleware"
     13 	"github.com/aws/smithy-go/tracing"
     14 	smithyhttp "github.com/aws/smithy-go/transport/http"
     15 	"slices"
     16 	"strings"
     17 )
     18 
     19 func bindAuthParamsRegion(_ interface{}, params *AuthResolverParameters, _ interface{}, options Options) {
     20 	params.Region = options.Region
     21 }
     22 
     23 type setLegacyContextSigningOptionsMiddleware struct {
     24 }
     25 
     26 func (*setLegacyContextSigningOptionsMiddleware) ID() string {
     27 	return "setLegacyContextSigningOptions"
     28 }
     29 
     30 func (m *setLegacyContextSigningOptionsMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
     31 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
     32 ) {
     33 	rscheme := getResolvedAuthScheme(ctx)
     34 	schemeID := rscheme.Scheme.SchemeID()
     35 
     36 	if sn := awsmiddleware.GetSigningName(ctx); sn != "" {
     37 		if schemeID == "aws.auth#sigv4" {
     38 			smithyhttp.SetSigV4SigningName(&rscheme.SignerProperties, sn)
     39 		} else if schemeID == "aws.auth#sigv4a" {
     40 			smithyhttp.SetSigV4ASigningName(&rscheme.SignerProperties, sn)
     41 		}
     42 	}
     43 
     44 	if sr := awsmiddleware.GetSigningRegion(ctx); sr != "" {
     45 		if schemeID == "aws.auth#sigv4" {
     46 			smithyhttp.SetSigV4SigningRegion(&rscheme.SignerProperties, sr)
     47 		} else if schemeID == "aws.auth#sigv4a" {
     48 			smithyhttp.SetSigV4ASigningRegions(&rscheme.SignerProperties, []string{sr})
     49 		}
     50 	}
     51 
     52 	return next.HandleFinalize(ctx, in)
     53 }
     54 
     55 func addSetLegacyContextSigningOptionsMiddleware(stack *middleware.Stack) error {
     56 	return stack.Finalize.Insert(&setLegacyContextSigningOptionsMiddleware{}, "Signing", middleware.Before)
     57 }
     58 
     59 type withAnonymous struct {
     60 	resolver AuthSchemeResolver
     61 }
     62 
     63 var _ AuthSchemeResolver = (*withAnonymous)(nil)
     64 
     65 func (v *withAnonymous) ResolveAuthSchemes(ctx context.Context, params *AuthResolverParameters) ([]*smithyauth.Option, error) {
     66 	opts, err := v.resolver.ResolveAuthSchemes(ctx, params)
     67 	if err != nil {
     68 		return nil, err
     69 	}
     70 
     71 	opts = append(opts, &smithyauth.Option{
     72 		SchemeID: smithyauth.SchemeIDAnonymous,
     73 	})
     74 	return opts, nil
     75 }
     76 
     77 func wrapWithAnonymousAuth(options *Options) {
     78 	if _, ok := options.AuthSchemeResolver.(*defaultAuthSchemeResolver); !ok {
     79 		return
     80 	}
     81 
     82 	options.AuthSchemeResolver = &withAnonymous{
     83 		resolver: options.AuthSchemeResolver,
     84 	}
     85 }
     86 
     87 // AuthResolverParameters contains the set of inputs necessary for auth scheme
     88 // resolution.
     89 type AuthResolverParameters struct {
     90 	// The name of the operation being invoked.
     91 	Operation string
     92 
     93 	// The region in which the operation is being invoked.
     94 	Region string
     95 }
     96 
     97 func bindAuthResolverParams(ctx context.Context, operation string, input interface{}, options Options) *AuthResolverParameters {
     98 	params := &AuthResolverParameters{
     99 		Operation: operation,
    100 	}
    101 
    102 	bindAuthParamsRegion(ctx, params, input, options)
    103 
    104 	return params
    105 }
    106 
    107 // AuthSchemeResolver returns a set of possible authentication options for an
    108 // operation.
    109 type AuthSchemeResolver interface {
    110 	ResolveAuthSchemes(context.Context, *AuthResolverParameters) ([]*smithyauth.Option, error)
    111 }
    112 
    113 type defaultAuthSchemeResolver struct{}
    114 
    115 var _ AuthSchemeResolver = (*defaultAuthSchemeResolver)(nil)
    116 
    117 func (*defaultAuthSchemeResolver) ResolveAuthSchemes(ctx context.Context, params *AuthResolverParameters) ([]*smithyauth.Option, error) {
    118 	if overrides, ok := operationAuthOptions[params.Operation]; ok {
    119 		return overrides(params), nil
    120 	}
    121 	return serviceAuthOptions(params), nil
    122 }
    123 
    124 var operationAuthOptions = map[string]func(*AuthResolverParameters) []*smithyauth.Option{}
    125 
    126 func serviceAuthOptions(params *AuthResolverParameters) []*smithyauth.Option {
    127 	return []*smithyauth.Option{
    128 		{
    129 			SchemeID: smithyauth.SchemeIDSigV4,
    130 			SignerProperties: func() smithy.Properties {
    131 				var props smithy.Properties
    132 				smithyhttp.SetSigV4SigningName(&props, "route53")
    133 				smithyhttp.SetSigV4SigningRegion(&props, params.Region)
    134 				return props
    135 			}(),
    136 		},
    137 	}
    138 }
    139 
    140 type resolveAuthSchemeMiddleware struct {
    141 	operation string
    142 	options   Options
    143 }
    144 
    145 func (*resolveAuthSchemeMiddleware) ID() string {
    146 	return "ResolveAuthScheme"
    147 }
    148 
    149 func (m *resolveAuthSchemeMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    150 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    151 ) {
    152 	_, span := tracing.StartSpan(ctx, "ResolveAuthScheme")
    153 	defer span.End()
    154 
    155 	params := bindAuthResolverParams(ctx, m.operation, getOperationInput(ctx), m.options)
    156 	options, err := m.options.AuthSchemeResolver.ResolveAuthSchemes(ctx, params)
    157 	if err != nil {
    158 		return out, metadata, fmt.Errorf("resolve auth scheme: %w", err)
    159 	}
    160 
    161 	scheme, ok := m.selectScheme(options)
    162 	if !ok {
    163 		return out, metadata, fmt.Errorf("could not select an auth scheme")
    164 	}
    165 
    166 	ctx = setResolvedAuthScheme(ctx, scheme)
    167 
    168 	span.SetProperty("auth.scheme_id", scheme.Scheme.SchemeID())
    169 	span.End()
    170 	return next.HandleFinalize(ctx, in)
    171 }
    172 
    173 func (m *resolveAuthSchemeMiddleware) selectScheme(options []*smithyauth.Option) (*resolvedAuthScheme, bool) {
    174 	sorted := sortAuthOptions(options, m.options.AuthSchemePreference)
    175 	for _, option := range sorted {
    176 		if option.SchemeID == smithyauth.SchemeIDAnonymous {
    177 			return newResolvedAuthScheme(smithyhttp.NewAnonymousScheme(), option), true
    178 		}
    179 
    180 		for _, scheme := range m.options.AuthSchemes {
    181 			if scheme.SchemeID() != option.SchemeID {
    182 				continue
    183 			}
    184 
    185 			if scheme.IdentityResolver(m.options) != nil {
    186 				return newResolvedAuthScheme(scheme, option), true
    187 			}
    188 		}
    189 	}
    190 
    191 	return nil, false
    192 }
    193 
    194 func sortAuthOptions(options []*smithyauth.Option, preferred []string) []*smithyauth.Option {
    195 	byPriority := make([]*smithyauth.Option, 0, len(options))
    196 	for _, prefName := range preferred {
    197 		for _, option := range options {
    198 			optName := option.SchemeID
    199 			if parts := strings.Split(option.SchemeID, "#"); len(parts) == 2 {
    200 				optName = parts[1]
    201 			}
    202 			if prefName == optName {
    203 				byPriority = append(byPriority, option)
    204 			}
    205 		}
    206 	}
    207 	for _, option := range options {
    208 		if !slices.ContainsFunc(byPriority, func(o *smithyauth.Option) bool {
    209 			return o.SchemeID == option.SchemeID
    210 		}) {
    211 			byPriority = append(byPriority, option)
    212 		}
    213 	}
    214 	return byPriority
    215 }
    216 
    217 type resolvedAuthSchemeKey struct{}
    218 
    219 type resolvedAuthScheme struct {
    220 	Scheme             smithyhttp.AuthScheme
    221 	IdentityProperties smithy.Properties
    222 	SignerProperties   smithy.Properties
    223 }
    224 
    225 func newResolvedAuthScheme(scheme smithyhttp.AuthScheme, option *smithyauth.Option) *resolvedAuthScheme {
    226 	return &resolvedAuthScheme{
    227 		Scheme:             scheme,
    228 		IdentityProperties: option.IdentityProperties,
    229 		SignerProperties:   option.SignerProperties,
    230 	}
    231 }
    232 
    233 func setResolvedAuthScheme(ctx context.Context, scheme *resolvedAuthScheme) context.Context {
    234 	return middleware.WithStackValue(ctx, resolvedAuthSchemeKey{}, scheme)
    235 }
    236 
    237 func getResolvedAuthScheme(ctx context.Context) *resolvedAuthScheme {
    238 	v, _ := middleware.GetStackValue(ctx, resolvedAuthSchemeKey{}).(*resolvedAuthScheme)
    239 	return v
    240 }
    241 
    242 type getIdentityMiddleware struct {
    243 	options Options
    244 }
    245 
    246 func (*getIdentityMiddleware) ID() string {
    247 	return "GetIdentity"
    248 }
    249 
    250 func (m *getIdentityMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    251 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    252 ) {
    253 	innerCtx, span := tracing.StartSpan(ctx, "GetIdentity")
    254 	defer span.End()
    255 
    256 	rscheme := getResolvedAuthScheme(innerCtx)
    257 	if rscheme == nil {
    258 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    259 	}
    260 
    261 	resolver := rscheme.Scheme.IdentityResolver(m.options)
    262 	if resolver == nil {
    263 		return out, metadata, fmt.Errorf("no identity resolver")
    264 	}
    265 
    266 	identity, err := timeOperationMetric(ctx, "client.call.resolve_identity_duration",
    267 		func() (smithyauth.Identity, error) {
    268 			return resolver.GetIdentity(innerCtx, rscheme.IdentityProperties)
    269 		},
    270 		func(o *metrics.RecordMetricOptions) {
    271 			o.Properties.Set("auth.scheme_id", rscheme.Scheme.SchemeID())
    272 		})
    273 	if err != nil {
    274 		return out, metadata, fmt.Errorf("get identity: %w", err)
    275 	}
    276 
    277 	ctx = setIdentity(ctx, identity)
    278 
    279 	span.End()
    280 	return next.HandleFinalize(ctx, in)
    281 }
    282 
    283 type identityKey struct{}
    284 
    285 func setIdentity(ctx context.Context, identity smithyauth.Identity) context.Context {
    286 	return middleware.WithStackValue(ctx, identityKey{}, identity)
    287 }
    288 
    289 func getIdentity(ctx context.Context) smithyauth.Identity {
    290 	v, _ := middleware.GetStackValue(ctx, identityKey{}).(smithyauth.Identity)
    291 	return v
    292 }
    293 
    294 type signRequestMiddleware struct {
    295 	options Options
    296 }
    297 
    298 func (*signRequestMiddleware) ID() string {
    299 	return "Signing"
    300 }
    301 
    302 func (m *signRequestMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    303 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    304 ) {
    305 	_, span := tracing.StartSpan(ctx, "SignRequest")
    306 	defer span.End()
    307 
    308 	req, ok := in.Request.(*smithyhttp.Request)
    309 	if !ok {
    310 		return out, metadata, fmt.Errorf("unexpected transport type %T", in.Request)
    311 	}
    312 
    313 	rscheme := getResolvedAuthScheme(ctx)
    314 	if rscheme == nil {
    315 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    316 	}
    317 
    318 	identity := getIdentity(ctx)
    319 	if identity == nil {
    320 		return out, metadata, fmt.Errorf("no identity")
    321 	}
    322 
    323 	signer := rscheme.Scheme.Signer()
    324 	if signer == nil {
    325 		return out, metadata, fmt.Errorf("no signer")
    326 	}
    327 
    328 	_, err = timeOperationMetric(ctx, "client.call.signing_duration", func() (any, error) {
    329 		return nil, signer.SignRequest(ctx, req, identity, rscheme.SignerProperties)
    330 	}, func(o *metrics.RecordMetricOptions) {
    331 		o.Properties.Set("auth.scheme_id", rscheme.Scheme.SchemeID())
    332 	})
    333 	if err != nil {
    334 		return out, metadata, fmt.Errorf("sign request: %w", err)
    335 	}
    336 
    337 	span.End()
    338 	return next.HandleFinalize(ctx, in)
    339 }