frostfs-s3-gw/api/middleware/auth.go

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package middleware
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import (
"crypto/elliptic"
"errors"
"fmt"
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"net/http"
"time"
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"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/acl"
apiErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
frostfsErrors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"go.uber.org/zap"
)
type (
// Box contains access box and additional info.
Box struct {
AccessBox *accessbox.Box
ClientTime time.Time
AuthHeaders *AuthHeader
}
// Center is a user authentication interface.
Center interface {
// Authenticate validate and authenticate request.
// Must return ErrNoAuthorizationHeader if auth header is missed.
Authenticate(request *http.Request) (*Box, error)
}
//nolint:revive
AuthHeader struct {
AccessKeyID string
Region string
SignatureV4 string
}
)
// ErrNoAuthorizationHeader is returned for unauthenticated requests.
var ErrNoAuthorizationHeader = errors.New("no authorization header")
func Auth(center Center, log *zap.Logger) Func {
return func(h http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
reqInfo := GetReqInfo(ctx)
reqInfo.User = "anon"
box, err := center.Authenticate(r)
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if err != nil {
if errors.Is(err, ErrNoAuthorizationHeader) {
reqLogOrDefault(ctx, log).Debug(logs.CouldntReceiveAccessBoxForGateKeyRandomKeyWillBeUsed, zap.Error(err))
} else {
reqLogOrDefault(ctx, log).Error(logs.FailedToPassAuthentication, zap.Error(err))
err = frostfsErrors.UnwrapErr(err)
if _, ok := err.(apiErrors.Error); !ok {
err = apiErrors.GetAPIError(apiErrors.ErrAccessDenied)
}
WriteErrorResponse(w, GetReqInfo(r.Context()), err)
return
}
} else {
ctx = SetBoxData(ctx, box.AccessBox)
if !box.ClientTime.IsZero() {
ctx = SetClientTime(ctx, box.ClientTime)
}
ctx = SetAuthHeaders(ctx, box.AuthHeaders)
if box.AccessBox.Gate.BearerToken != nil {
reqInfo.User = bearer.ResolveIssuer(*box.AccessBox.Gate.BearerToken).String()
}
}
h.ServeHTTP(w, r.WithContext(ctx))
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})
}
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}
type FrostFSIDValidator interface {
ValidatePublicKey(key *keys.PublicKey) error
}
func FrostfsIDValidation(frostfsID FrostFSIDValidator, log *zap.Logger) Func {
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
bd, err := GetBoxData(ctx)
if err != nil || bd.Gate.BearerToken == nil {
reqLogOrDefault(ctx, log).Debug(logs.AnonRequestSkipFrostfsIDValidation)
h.ServeHTTP(w, r)
return
}
if err = validateBearerToken(frostfsID, bd.Gate.BearerToken); err != nil {
reqLogOrDefault(ctx, log).Error(logs.FrostfsIDValidationFailed, zap.Error(err))
WriteErrorResponse(w, GetReqInfo(r.Context()), err)
return
}
h.ServeHTTP(w, r)
})
}
}
func validateBearerToken(frostfsID FrostFSIDValidator, bt *bearer.Token) error {
m := new(acl.BearerToken)
bt.WriteToV2(m)
pk, err := keys.NewPublicKeyFromBytes(m.GetSignature().GetKey(), elliptic.P256())
if err != nil {
return fmt.Errorf("invalid bearer token public key: %w", err)
}
if err = frostfsID.ValidatePublicKey(pk); err != nil {
return fmt.Errorf("validation data user key failed: %w", err)
}
return nil
}