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auth.go (8792B)

      1 // Code generated by smithy-go-codegen DO NOT EDIT.
      2 
      3 package ssooidc
      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 	"CreateToken": func(params *AuthResolverParameters) []*smithyauth.Option {
    122 		return []*smithyauth.Option{
    123 			{SchemeID: smithyauth.SchemeIDAnonymous},
    124 		}
    125 	},
    126 
    127 	"RegisterClient": func(params *AuthResolverParameters) []*smithyauth.Option {
    128 		return []*smithyauth.Option{
    129 			{SchemeID: smithyauth.SchemeIDAnonymous},
    130 		}
    131 	},
    132 
    133 	"StartDeviceAuthorization": func(params *AuthResolverParameters) []*smithyauth.Option {
    134 		return []*smithyauth.Option{
    135 			{SchemeID: smithyauth.SchemeIDAnonymous},
    136 		}
    137 	},
    138 }
    139 
    140 func serviceAuthOptions(params *AuthResolverParameters) []*smithyauth.Option {
    141 	return []*smithyauth.Option{
    142 		{
    143 			SchemeID: smithyauth.SchemeIDSigV4,
    144 			SignerProperties: func() smithy.Properties {
    145 				var props smithy.Properties
    146 				smithyhttp.SetSigV4SigningName(&props, "sso-oauth")
    147 				smithyhttp.SetSigV4SigningRegion(&props, params.Region)
    148 				return props
    149 			}(),
    150 		},
    151 	}
    152 }
    153 
    154 type resolveAuthSchemeMiddleware struct {
    155 	operation string
    156 	options   Options
    157 }
    158 
    159 func (*resolveAuthSchemeMiddleware) ID() string {
    160 	return "ResolveAuthScheme"
    161 }
    162 
    163 func (m *resolveAuthSchemeMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    164 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    165 ) {
    166 	params := bindAuthResolverParams(m.operation, getOperationInput(ctx), m.options)
    167 	options, err := m.options.AuthSchemeResolver.ResolveAuthSchemes(ctx, params)
    168 	if err != nil {
    169 		return out, metadata, fmt.Errorf("resolve auth scheme: %w", err)
    170 	}
    171 
    172 	scheme, ok := m.selectScheme(options)
    173 	if !ok {
    174 		return out, metadata, fmt.Errorf("could not select an auth scheme")
    175 	}
    176 
    177 	ctx = setResolvedAuthScheme(ctx, scheme)
    178 	return next.HandleFinalize(ctx, in)
    179 }
    180 
    181 func (m *resolveAuthSchemeMiddleware) selectScheme(options []*smithyauth.Option) (*resolvedAuthScheme, bool) {
    182 	for _, option := range options {
    183 		if option.SchemeID == smithyauth.SchemeIDAnonymous {
    184 			return newResolvedAuthScheme(smithyhttp.NewAnonymousScheme(), option), true
    185 		}
    186 
    187 		for _, scheme := range m.options.AuthSchemes {
    188 			if 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 type resolvedAuthSchemeKey struct{}
    202 
    203 type resolvedAuthScheme struct {
    204 	Scheme             smithyhttp.AuthScheme
    205 	IdentityProperties smithy.Properties
    206 	SignerProperties   smithy.Properties
    207 }
    208 
    209 func newResolvedAuthScheme(scheme smithyhttp.AuthScheme, option *smithyauth.Option) *resolvedAuthScheme {
    210 	return &resolvedAuthScheme{
    211 		Scheme:             scheme,
    212 		IdentityProperties: option.IdentityProperties,
    213 		SignerProperties:   option.SignerProperties,
    214 	}
    215 }
    216 
    217 func setResolvedAuthScheme(ctx context.Context, scheme *resolvedAuthScheme) context.Context {
    218 	return middleware.WithStackValue(ctx, resolvedAuthSchemeKey{}, scheme)
    219 }
    220 
    221 func getResolvedAuthScheme(ctx context.Context) *resolvedAuthScheme {
    222 	v, _ := middleware.GetStackValue(ctx, resolvedAuthSchemeKey{}).(*resolvedAuthScheme)
    223 	return v
    224 }
    225 
    226 type getIdentityMiddleware struct {
    227 	options Options
    228 }
    229 
    230 func (*getIdentityMiddleware) ID() string {
    231 	return "GetIdentity"
    232 }
    233 
    234 func (m *getIdentityMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    235 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    236 ) {
    237 	rscheme := getResolvedAuthScheme(ctx)
    238 	if rscheme == nil {
    239 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    240 	}
    241 
    242 	resolver := rscheme.Scheme.IdentityResolver(m.options)
    243 	if resolver == nil {
    244 		return out, metadata, fmt.Errorf("no identity resolver")
    245 	}
    246 
    247 	identity, err := resolver.GetIdentity(ctx, rscheme.IdentityProperties)
    248 	if err != nil {
    249 		return out, metadata, fmt.Errorf("get identity: %w", err)
    250 	}
    251 
    252 	ctx = setIdentity(ctx, identity)
    253 	return next.HandleFinalize(ctx, in)
    254 }
    255 
    256 type identityKey struct{}
    257 
    258 func setIdentity(ctx context.Context, identity smithyauth.Identity) context.Context {
    259 	return middleware.WithStackValue(ctx, identityKey{}, identity)
    260 }
    261 
    262 func getIdentity(ctx context.Context) smithyauth.Identity {
    263 	v, _ := middleware.GetStackValue(ctx, identityKey{}).(smithyauth.Identity)
    264 	return v
    265 }
    266 
    267 type signRequestMiddleware struct {
    268 }
    269 
    270 func (*signRequestMiddleware) ID() string {
    271 	return "Signing"
    272 }
    273 
    274 func (m *signRequestMiddleware) HandleFinalize(ctx context.Context, in middleware.FinalizeInput, next middleware.FinalizeHandler) (
    275 	out middleware.FinalizeOutput, metadata middleware.Metadata, err error,
    276 ) {
    277 	req, ok := in.Request.(*smithyhttp.Request)
    278 	if !ok {
    279 		return out, metadata, fmt.Errorf("unexpected transport type %T", in.Request)
    280 	}
    281 
    282 	rscheme := getResolvedAuthScheme(ctx)
    283 	if rscheme == nil {
    284 		return out, metadata, fmt.Errorf("no resolved auth scheme")
    285 	}
    286 
    287 	identity := getIdentity(ctx)
    288 	if identity == nil {
    289 		return out, metadata, fmt.Errorf("no identity")
    290 	}
    291 
    292 	signer := rscheme.Scheme.Signer()
    293 	if signer == nil {
    294 		return out, metadata, fmt.Errorf("no signer")
    295 	}
    296 
    297 	if err := signer.SignRequest(ctx, req, identity, rscheme.SignerProperties); err != nil {
    298 		return out, metadata, fmt.Errorf("sign request: %w", err)
    299 	}
    300 
    301 	return next.HandleFinalize(ctx, in)
    302 }