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auth.go (10341B)

      1 // Code generated by smithy-go-codegen DO NOT EDIT.
      2 
      3 package route53
      4 
      5 import (
      6 	"context"
      7 	"fmt"
      8 	"slices"
      9 	"strings"
     10 
     11 	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
     12 	smithy "github.com/aws/smithy-go"
     13 	smithyauth "github.com/aws/smithy-go/auth"
     14 	"github.com/aws/smithy-go/metrics"
     15 	"github.com/aws/smithy-go/middleware"
     16 	"github.com/aws/smithy-go/tracing"
     17 	smithyhttp "github.com/aws/smithy-go/transport/http"
     18 )
     19 
     20 func bindAuthParamsRegion(_ interface{}, params *AuthResolverParameters, _ interface{}, options Options) error {
     21 	params.Region = options.Region
     22 	return nil
     23 }
     24 
     25 type setLegacyContextSigningOptionsMiddleware struct {
     26 }
     27 
     28 func (*setLegacyContextSigningOptionsMiddleware) ID() string {
     29 	return "setLegacyContextSigningOptions"
     30 }
     31 
     32 func (m *setLegacyContextSigningOptionsMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
     33 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
     34 ) {
     35 	rscheme := getResolvedAuthScheme(ctx)
     36 	schemeID := rscheme.Scheme.SchemeID()
     37 
     38 	if sn := awsmiddleware.GetSigningName(ctx); sn != "" {
     39 		if schemeID == "aws.auth#sigv4" {
     40 			smithyhttp.SetSigV4SigningName(&rscheme.SignerProperties, sn)
     41 		} else if schemeID == "aws.auth#sigv4a" {
     42 			smithyhttp.SetSigV4ASigningName(&rscheme.SignerProperties, sn)
     43 		}
     44 	}
     45 
     46 	if sr := awsmiddleware.GetSigningRegion(ctx); sr != "" {
     47 		if schemeID == "aws.auth#sigv4" {
     48 			smithyhttp.SetSigV4SigningRegion(&rscheme.SignerProperties, sr)
     49 		} else if schemeID == "aws.auth#sigv4a" {
     50 			smithyhttp.SetSigV4ASigningRegions(&rscheme.SignerProperties, []string{sr})
     51 		}
     52 	}
     53 
     54 	return next.HandleFinalize(ctx, in)
     55 }
     56 
     57 func addSetLegacyContextSigningOptionsMiddleware(stack *middleware.Stack) error {
     58 	return stack.Finalize.Insert(&setLegacyContextSigningOptionsMiddleware{}, "Signing", middleware.Before)
     59 }
     60 
     61 type withAnonymous struct {
     62 	resolver AuthSchemeResolver
     63 }
     64 
     65 var _ AuthSchemeResolver = (*withAnonymous)(nil)
     66 
     67 func (v *withAnonymous) ResolveAuthSchemes(ctx context.Context, params *AuthResolverParameters) ([]*smithyauth.Option, error) {
     68 	opts, err := v.resolver.ResolveAuthSchemes(ctx, params)
     69 	if err != nil {
     70 		return nil, err
     71 	}
     72 
     73 	opts = append(opts, &smithyauth.Option{
     74 		SchemeID: smithyauth.SchemeIDAnonymous,
     75 	})
     76 	return opts, nil
     77 }
     78 
     79 func wrapWithAnonymousAuth(options *Options) {
     80 	if _, ok := options.AuthSchemeResolver.(*defaultAuthSchemeResolver); !ok {
     81 		return
     82 	}
     83 
     84 	options.AuthSchemeResolver = &withAnonymous{
     85 		resolver: options.AuthSchemeResolver,
     86 	}
     87 }
     88 
     89 // AuthResolverParameters contains the set of inputs necessary for auth scheme
     90 // resolution.
     91 type AuthResolverParameters struct {
     92 	// The name of the operation being invoked.
     93 	Operation string
     94 
     95 	// The region in which the operation is being invoked.
     96 	Region string
     97 }
     98 
     99 func bindAuthResolverParams(ctx context.Context, operation string, input interface{}, options Options) (*AuthResolverParameters, error) {
    100 	params := &AuthResolverParameters{
    101 		Operation: operation,
    102 	}
    103 
    104 	if err := bindAuthParamsRegion(ctx, params, input, options); err != nil {
    105 		return nil, err
    106 	}
    107 
    108 	return params, nil
    109 }
    110 
    111 // AuthSchemeResolver returns a set of possible authentication options for an
    112 // operation.
    113 type AuthSchemeResolver interface {
    114 	ResolveAuthSchemes(context.Context, *AuthResolverParameters) ([]*smithyauth.Option, error)
    115 }
    116 
    117 type defaultAuthSchemeResolver struct{}
    118 
    119 var _ AuthSchemeResolver = (*defaultAuthSchemeResolver)(nil)
    120 
    121 func (*defaultAuthSchemeResolver) ResolveAuthSchemes(ctx context.Context, params *AuthResolverParameters) ([]*smithyauth.Option, error) {
    122 	if overrides, ok := operationAuthOptions[params.Operation]; ok {
    123 		return overrides(params), nil
    124 	}
    125 	return serviceAuthOptions(params), nil
    126 }
    127 
    128 var operationAuthOptions = map[string]func(*AuthResolverParameters) []*smithyauth.Option{}
    129 
    130 func serviceAuthOptions(params *AuthResolverParameters) []*smithyauth.Option {
    131 	return []*smithyauth.Option{
    132 		{
    133 			SchemeID: smithyauth.SchemeIDSigV4,
    134 			SignerProperties: func() smithy.Properties {
    135 				var props smithy.Properties
    136 				smithyhttp.SetSigV4SigningName(&props, "route53")
    137 				smithyhttp.SetSigV4SigningRegion(&props, params.Region)
    138 				return props
    139 			}(),
    140 		},
    141 	}
    142 }
    143 
    144 type resolveAuthSchemeMiddleware struct {
    145 	operation string
    146 	options   Options
    147 }
    148 
    149 func (*resolveAuthSchemeMiddleware) ID() string {
    150 	return "ResolveAuthScheme"
    151 }
    152 
    153 func (m *resolveAuthSchemeMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    154 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    155 ) {
    156 	_, span := tracing.StartSpan(ctx, "ResolveAuthScheme")
    157 	defer span.End()
    158 
    159 	params, err := bindAuthResolverParams(ctx, m.operation, getOperationInput(ctx), m.options)
    160 	if err != nil {
    161 		return out, metadata, fmt.Errorf("bind auth scheme params: %w", err)
    162 	}
    163 	options, err := m.options.AuthSchemeResolver.ResolveAuthSchemes(ctx, params)
    164 	if err != nil {
    165 		return out, metadata, fmt.Errorf("resolve auth scheme: %w", err)
    166 	}
    167 
    168 	scheme, ok := m.selectScheme(options)
    169 	if !ok {
    170 		return out, metadata, fmt.Errorf("could not select an auth scheme")
    171 	}
    172 
    173 	ctx = setResolvedAuthScheme(ctx, scheme)
    174 
    175 	span.SetProperty("auth.scheme_id", scheme.Scheme.SchemeID())
    176 	span.End()
    177 	return next.HandleFinalize(ctx, in)
    178 }
    179 
    180 func (m *resolveAuthSchemeMiddleware) selectScheme(options []*smithyauth.Option) (*resolvedAuthScheme, bool) {
    181 	sorted := sortAuthOptions(options, m.options.AuthSchemePreference)
    182 	for _, option := range sorted {
    183 		if option.SchemeID == smithyauth.SchemeIDAnonymous {
    184 			return newResolvedAuthScheme(smithyhttp.NewAnonymousScheme(), option), true
    185 		}
    186 
    187 		for _, scheme := range m.options.AuthSchemes {
    188 			if !matchSchemeID(scheme.SchemeID(), option.SchemeID) {
    189 				continue
    190 			}
    191 
    192 			if scheme.IdentityResolver(m.options) != nil {
    193 				return newResolvedAuthScheme(scheme, option), true
    194 			}
    195 		}
    196 	}
    197 
    198 	return nil, false
    199 }
    200 
    201 func matchSchemeID(registered, option string) bool {
    202 	if registered == option {
    203 		return true
    204 	}
    205 	if i := strings.LastIndex(registered, "#"); i != -1 {
    206 		return registered[i+1:] == option
    207 	}
    208 	return false
    209 }
    210 
    211 func sortAuthOptions(options []*smithyauth.Option, preferred []string) []*smithyauth.Option {
    212 	byPriority := make([]*smithyauth.Option, 0, len(options))
    213 	for _, prefName := range preferred {
    214 		for _, option := range options {
    215 			optName := option.SchemeID
    216 			if parts := strings.Split(option.SchemeID, "#"); len(parts) == 2 {
    217 				optName = parts[1]
    218 			}
    219 			if prefName == optName {
    220 				byPriority = append(byPriority, option)
    221 			}
    222 		}
    223 	}
    224 	for _, option := range options {
    225 		if !slices.ContainsFunc(byPriority, func(o *smithyauth.Option) bool {
    226 			return o.SchemeID == option.SchemeID
    227 		}) {
    228 			byPriority = append(byPriority, option)
    229 		}
    230 	}
    231 	return byPriority
    232 }
    233 
    234 type resolvedAuthSchemeKey struct{}
    235 
    236 type resolvedAuthScheme struct {
    237 	Scheme             smithyhttp.AuthScheme
    238 	IdentityProperties smithy.Properties
    239 	SignerProperties   smithy.Properties
    240 }
    241 
    242 func newResolvedAuthScheme(scheme smithyhttp.AuthScheme, option *smithyauth.Option) *resolvedAuthScheme {
    243 	return &resolvedAuthScheme{
    244 		Scheme:             scheme,
    245 		IdentityProperties: option.IdentityProperties,
    246 		SignerProperties:   option.SignerProperties,
    247 	}
    248 }
    249 
    250 func setResolvedAuthScheme(ctx context.Context, scheme *resolvedAuthScheme) context.Context {
    251 	return middleware.WithStackValue(ctx, resolvedAuthSchemeKey{}, scheme)
    252 }
    253 
    254 func getResolvedAuthScheme(ctx context.Context) *resolvedAuthScheme {
    255 	v, _ := middleware.GetStackValue(ctx, resolvedAuthSchemeKey{}).(*resolvedAuthScheme)
    256 	return v
    257 }
    258 
    259 type getIdentityMiddleware struct {
    260 	options Options
    261 }
    262 
    263 func (*getIdentityMiddleware) ID() string {
    264 	return "GetIdentity"
    265 }
    266 
    267 func (m *getIdentityMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    268 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    269 ) {
    270 	innerCtx, span := tracing.StartSpan(ctx, "GetIdentity")
    271 	defer span.End()
    272 
    273 	rscheme := getResolvedAuthScheme(innerCtx)
    274 	if rscheme == nil {
    275 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    276 	}
    277 
    278 	resolver := rscheme.Scheme.IdentityResolver(m.options)
    279 	if resolver == nil {
    280 		return out, metadata, fmt.Errorf("no identity resolver")
    281 	}
    282 
    283 	identity, err := timeOperationMetric(ctx, "client.call.resolve_identity_duration",
    284 		func() (smithyauth.Identity, error) {
    285 			return resolver.GetIdentity(innerCtx, rscheme.IdentityProperties)
    286 		},
    287 		func(o *metrics.RecordMetricOptions) {
    288 			o.Properties.Set("auth.scheme_id", rscheme.Scheme.SchemeID())
    289 		})
    290 	if err != nil {
    291 		return out, metadata, fmt.Errorf("get identity: %w", err)
    292 	}
    293 
    294 	ctx = setIdentity(ctx, identity)
    295 
    296 	span.End()
    297 	return next.HandleFinalize(ctx, in)
    298 }
    299 
    300 type identityKey struct{}
    301 
    302 func setIdentity(ctx context.Context, identity smithyauth.Identity) context.Context {
    303 	return middleware.WithStackValue(ctx, identityKey{}, identity)
    304 }
    305 
    306 func getIdentity(ctx context.Context) smithyauth.Identity {
    307 	v, _ := middleware.GetStackValue(ctx, identityKey{}).(smithyauth.Identity)
    308 	return v
    309 }
    310 
    311 type signRequestMiddleware struct {
    312 	options Options
    313 }
    314 
    315 func (*signRequestMiddleware) ID() string {
    316 	return "Signing"
    317 }
    318 
    319 func (m *signRequestMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    320 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    321 ) {
    322 	_, span := tracing.StartSpan(ctx, "SignRequest")
    323 	defer span.End()
    324 
    325 	req, ok := in.Request.(*smithyhttp.Request)
    326 	if !ok {
    327 		return out, metadata, fmt.Errorf("unexpected transport type %T", in.Request)
    328 	}
    329 
    330 	rscheme := getResolvedAuthScheme(ctx)
    331 	if rscheme == nil {
    332 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    333 	}
    334 
    335 	identity := getIdentity(ctx)
    336 	if identity == nil {
    337 		return out, metadata, fmt.Errorf("no identity")
    338 	}
    339 
    340 	signer := rscheme.Scheme.Signer()
    341 	if signer == nil {
    342 		return out, metadata, fmt.Errorf("no signer")
    343 	}
    344 
    345 	_, err = timeOperationMetric(ctx, "client.call.signing_duration", func() (any, error) {
    346 		return nil, signer.SignRequest(ctx, req, identity, rscheme.SignerProperties)
    347 	}, func(o *metrics.RecordMetricOptions) {
    348 		o.Properties.Set("auth.scheme_id", rscheme.Scheme.SchemeID())
    349 	})
    350 	if err != nil {
    351 		return out, metadata, fmt.Errorf("sign request: %w", err)
    352 	}
    353 
    354 	span.End()
    355 	return next.HandleFinalize(ctx, in)
    356 }