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auth.go (10280B)

      1 // Code generated by smithy-go-codegen DO NOT EDIT.
      2 
      3 package sts
      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 	"AssumeRoleWithSAML": func(params *AuthResolverParameters) []*smithyauth.Option {
    126 		return []*smithyauth.Option{
    127 			{SchemeID: smithyauth.SchemeIDAnonymous},
    128 		}
    129 	},
    130 
    131 	"AssumeRoleWithWebIdentity": func(params *AuthResolverParameters) []*smithyauth.Option {
    132 		return []*smithyauth.Option{
    133 			{SchemeID: smithyauth.SchemeIDAnonymous},
    134 		}
    135 	},
    136 }
    137 
    138 func serviceAuthOptions(params *AuthResolverParameters) []*smithyauth.Option {
    139 	return []*smithyauth.Option{
    140 		{
    141 			SchemeID: smithyauth.SchemeIDSigV4,
    142 			SignerProperties: func() smithy.Properties {
    143 				var props smithy.Properties
    144 				smithyhttp.SetSigV4SigningName(&props, "sts")
    145 				smithyhttp.SetSigV4SigningRegion(&props, params.Region)
    146 				return props
    147 			}(),
    148 		},
    149 	}
    150 }
    151 
    152 type resolveAuthSchemeMiddleware struct {
    153 	operation string
    154 	options   Options
    155 }
    156 
    157 func (*resolveAuthSchemeMiddleware) ID() string {
    158 	return "ResolveAuthScheme"
    159 }
    160 
    161 func (m *resolveAuthSchemeMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    162 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    163 ) {
    164 	_, span := tracing.StartSpan(ctx, "ResolveAuthScheme")
    165 	defer span.End()
    166 
    167 	params := bindAuthResolverParams(ctx, m.operation, getOperationInput(ctx), m.options)
    168 	options, err := m.options.AuthSchemeResolver.ResolveAuthSchemes(ctx, params)
    169 	if err != nil {
    170 		return out, metadata, fmt.Errorf("resolve auth scheme: %w", err)
    171 	}
    172 
    173 	scheme, ok := m.selectScheme(options)
    174 	if !ok {
    175 		return out, metadata, fmt.Errorf("could not select an auth scheme")
    176 	}
    177 
    178 	ctx = setResolvedAuthScheme(ctx, scheme)
    179 
    180 	span.SetProperty("auth.scheme_id", scheme.Scheme.SchemeID())
    181 	span.End()
    182 	return next.HandleFinalize(ctx, in)
    183 }
    184 
    185 func (m *resolveAuthSchemeMiddleware) selectScheme(options []*smithyauth.Option) (*resolvedAuthScheme, bool) {
    186 	sorted := sortAuthOptions(options, m.options.AuthSchemePreference)
    187 	for _, option := range sorted {
    188 		if option.SchemeID == smithyauth.SchemeIDAnonymous {
    189 			return newResolvedAuthScheme(smithyhttp.NewAnonymousScheme(), option), true
    190 		}
    191 
    192 		for _, scheme := range m.options.AuthSchemes {
    193 			if scheme.SchemeID() != option.SchemeID {
    194 				continue
    195 			}
    196 
    197 			if scheme.IdentityResolver(m.options) != nil {
    198 				return newResolvedAuthScheme(scheme, option), true
    199 			}
    200 		}
    201 	}
    202 
    203 	return nil, false
    204 }
    205 
    206 func sortAuthOptions(options []*smithyauth.Option, preferred []string) []*smithyauth.Option {
    207 	byPriority := make([]*smithyauth.Option, 0, len(options))
    208 	for _, prefName := range preferred {
    209 		for _, option := range options {
    210 			optName := option.SchemeID
    211 			if parts := strings.Split(option.SchemeID, "#"); len(parts) == 2 {
    212 				optName = parts[1]
    213 			}
    214 			if prefName == optName {
    215 				byPriority = append(byPriority, option)
    216 			}
    217 		}
    218 	}
    219 	for _, option := range options {
    220 		if !slices.ContainsFunc(byPriority, func(o *smithyauth.Option) bool {
    221 			return o.SchemeID == option.SchemeID
    222 		}) {
    223 			byPriority = append(byPriority, option)
    224 		}
    225 	}
    226 	return byPriority
    227 }
    228 
    229 type resolvedAuthSchemeKey struct{}
    230 
    231 type resolvedAuthScheme struct {
    232 	Scheme             smithyhttp.AuthScheme
    233 	IdentityProperties smithy.Properties
    234 	SignerProperties   smithy.Properties
    235 }
    236 
    237 func newResolvedAuthScheme(scheme smithyhttp.AuthScheme, option *smithyauth.Option) *resolvedAuthScheme {
    238 	return &resolvedAuthScheme{
    239 		Scheme:             scheme,
    240 		IdentityProperties: option.IdentityProperties,
    241 		SignerProperties:   option.SignerProperties,
    242 	}
    243 }
    244 
    245 func setResolvedAuthScheme(ctx context.Context, scheme *resolvedAuthScheme) context.Context {
    246 	return middleware.WithStackValue(ctx, resolvedAuthSchemeKey{}, scheme)
    247 }
    248 
    249 func getResolvedAuthScheme(ctx context.Context) *resolvedAuthScheme {
    250 	v, _ := middleware.GetStackValue(ctx, resolvedAuthSchemeKey{}).(*resolvedAuthScheme)
    251 	return v
    252 }
    253 
    254 type getIdentityMiddleware struct {
    255 	options Options
    256 }
    257 
    258 func (*getIdentityMiddleware) ID() string {
    259 	return "GetIdentity"
    260 }
    261 
    262 func (m *getIdentityMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    263 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    264 ) {
    265 	innerCtx, span := tracing.StartSpan(ctx, "GetIdentity")
    266 	defer span.End()
    267 
    268 	rscheme := getResolvedAuthScheme(innerCtx)
    269 	if rscheme == nil {
    270 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    271 	}
    272 
    273 	resolver := rscheme.Scheme.IdentityResolver(m.options)
    274 	if resolver == nil {
    275 		return out, metadata, fmt.Errorf("no identity resolver")
    276 	}
    277 
    278 	identity, err := timeOperationMetric(ctx, "client.call.resolve_identity_duration",
    279 		func() (smithyauth.Identity, error) {
    280 			return resolver.GetIdentity(innerCtx, rscheme.IdentityProperties)
    281 		},
    282 		func(o *metrics.RecordMetricOptions) {
    283 			o.Properties.Set("auth.scheme_id", rscheme.Scheme.SchemeID())
    284 		})
    285 	if err != nil {
    286 		return out, metadata, fmt.Errorf("get identity: %w", err)
    287 	}
    288 
    289 	ctx = setIdentity(ctx, identity)
    290 
    291 	span.End()
    292 	return next.HandleFinalize(ctx, in)
    293 }
    294 
    295 type identityKey struct{}
    296 
    297 func setIdentity(ctx context.Context, identity smithyauth.Identity) context.Context {
    298 	return middleware.WithStackValue(ctx, identityKey{}, identity)
    299 }
    300 
    301 func getIdentity(ctx context.Context) smithyauth.Identity {
    302 	v, _ := middleware.GetStackValue(ctx, identityKey{}).(smithyauth.Identity)
    303 	return v
    304 }
    305 
    306 type signRequestMiddleware struct {
    307 	options Options
    308 }
    309 
    310 func (*signRequestMiddleware) ID() string {
    311 	return "Signing"
    312 }
    313 
    314 func (m *signRequestMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    315 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    316 ) {
    317 	_, span := tracing.StartSpan(ctx, "SignRequest")
    318 	defer span.End()
    319 
    320 	req, ok := in.Request.(*smithyhttp.Request)
    321 	if !ok {
    322 		return out, metadata, fmt.Errorf("unexpected transport type %T", in.Request)
    323 	}
    324 
    325 	rscheme := getResolvedAuthScheme(ctx)
    326 	if rscheme == nil {
    327 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    328 	}
    329 
    330 	identity := getIdentity(ctx)
    331 	if identity == nil {
    332 		return out, metadata, fmt.Errorf("no identity")
    333 	}
    334 
    335 	signer := rscheme.Scheme.Signer()
    336 	if signer == nil {
    337 		return out, metadata, fmt.Errorf("no signer")
    338 	}
    339 
    340 	_, err = timeOperationMetric(ctx, "client.call.signing_duration", func() (any, error) {
    341 		return nil, signer.SignRequest(ctx, req, identity, rscheme.SignerProperties)
    342 	}, func(o *metrics.RecordMetricOptions) {
    343 		o.Properties.Set("auth.scheme_id", rscheme.Scheme.SchemeID())
    344 	})
    345 	if err != nil {
    346 		return out, metadata, fmt.Errorf("sign request: %w", err)
    347 	}
    348 
    349 	span.End()
    350 	return next.HandleFinalize(ctx, in)
    351 }