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

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package middleware
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import (
"context"
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"net/http"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
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"go.uber.org/zap"
)
// KeyWrapper is wrapper for context keys.
type KeyWrapper string
// AuthHeaders is a wrapper for authentication headers of a request.
var AuthHeaders = KeyWrapper("__context_auth_headers_key")
// BoxData is an ID used to store accessbox.Box in a context.
var BoxData = KeyWrapper("__context_box_key")
// ClientTime is an ID used to store client time.Time in a context.
var ClientTime = KeyWrapper("__context_client_time")
func Auth(center auth.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()
box, err := center.Authenticate(r)
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if err != nil {
if err == auth.ErrNoAuthorizationHeader {
reqLogOrDefault(ctx, log).Debug("couldn't receive access box for gate key, random key will be used")
} else {
reqLogOrDefault(ctx, log).Error("failed to pass authentication", zap.Error(err))
if _, ok := err.(errors.Error); !ok {
err = errors.GetAPIError(errors.ErrAccessDenied)
}
WriteErrorResponse(w, GetReqInfo(r.Context()), err)
return
}
} else {
ctx = context.WithValue(ctx, BoxData, box.AccessBox)
if !box.ClientTime.IsZero() {
ctx = context.WithValue(ctx, ClientTime, box.ClientTime)
}
ctx = context.WithValue(ctx, AuthHeaders, box.AuthHeaders)
}
h.ServeHTTP(w, r.WithContext(ctx))
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})
}
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}