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package rfc
/*
* ZLint Copyright 2024 Regents of the University of Michigan
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
import (
"fmt"
"github.com/zmap/zcrypto/x509"
"github.com/zmap/zlint/v3/lint"
"github.com/zmap/zlint/v3/util"
)
type rsaSPKIEncryptionParamNotNULL struct{}
/*******************************************************************************************************
"RFC5280: RFC 4055, Section 1.2"
RSA: Encoded algorithm identifier MUST have NULL parameters.
*******************************************************************************************************/
func init() {
lint.RegisterCertificateLint(&lint.CertificateLint{
LintMetadata: lint.LintMetadata{
Name: "e_spki_rsa_encryption_parameter_not_null",
Description: "RSA: Encoded public key algorithm identifier MUST have NULL parameters",
Citation: "RFC 4055, Section 1.2",
Source: lint.RFC5280, // RFC4055 is referenced in lint.RFC5280, Section 1
EffectiveDate: util.RFC5280Date,
},
Lint: NewRsaSPKIEncryptionParamNotNULL,
})
}
func NewRsaSPKIEncryptionParamNotNULL() lint.LintInterface {
return &rsaSPKIEncryptionParamNotNULL{}
}
func (l *rsaSPKIEncryptionParamNotNULL) CheckApplies(c *x509.Certificate) bool {
// explicitly check for util.OidRSAEncryption, as RSA-PSS or RSA-OAEP certificates might be classified with c.PublicKeyAlgorithm = RSA
return c.PublicKeyAlgorithmOID.Equal(util.OidRSAEncryption)
}
func (l *rsaSPKIEncryptionParamNotNULL) Execute(c *x509.Certificate) *lint.LintResult {
encodedPublicKeyAid, err := util.GetPublicKeyAidEncoded(c)
if err != nil {
return &lint.LintResult{
Status: lint.Error,
Details: fmt.Sprintf("error reading public key algorithm identifier: %v", err),
}
}
if err := util.CheckAlgorithmIDParamNotNULL(encodedPublicKeyAid, util.OidRSAEncryption); err != nil {
return &lint.LintResult{Status: lint.Error, Details: fmt.Sprintf("certificate pkixPublicKey %s", err.Error())}
}
return &lint.LintResult{Status: lint.Pass}
}
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