github.com/zmap/zlint@v1.1.0/lints/lint_old_sub_cert_rsa_mod_less_than_1024_bits.go (about)

     1  package lints
     2  
     3  /*
     4   * ZLint Copyright 2018 Regents of the University of Michigan
     5   *
     6   * Licensed under the Apache License, Version 2.0 (the "License"); you may not
     7   * use this file except in compliance with the License. You may obtain a copy
     8   * of the License at http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
    13   * implied. See the License for the specific language governing
    14   * permissions and limitations under the License.
    15   */
    16  
    17  import (
    18  	"crypto/rsa"
    19  
    20  	"github.com/zmap/zcrypto/x509"
    21  	"github.com/zmap/zlint/util"
    22  )
    23  
    24  type subModSize struct{}
    25  
    26  func (l *subModSize) Initialize() error {
    27  	return nil
    28  }
    29  
    30  func (l *subModSize) CheckApplies(c *x509.Certificate) bool {
    31  	endDate := c.NotAfter
    32  	_, ok := c.PublicKey.(*rsa.PublicKey)
    33  	return ok && c.PublicKeyAlgorithm == x509.RSA && !util.IsCACert(c) && endDate.Before(util.NoRSA1024Date)
    34  }
    35  
    36  func (l *subModSize) Execute(c *x509.Certificate) *LintResult {
    37  	key := c.PublicKey.(*rsa.PublicKey)
    38  	if key.N.BitLen() < 1024 {
    39  		return &LintResult{Status: Error}
    40  	} else {
    41  		return &LintResult{Status: Pass}
    42  	}
    43  }
    44  
    45  func init() {
    46  	RegisterLint(&Lint{
    47  		Name:        "e_old_sub_cert_rsa_mod_less_than_1024_bits",
    48  		Description: "In a validity period ending on or before 31 Dec 2013, subscriber certificates using RSA public key algorithm MUST use a 1024 bit modulus",
    49  		Citation:    "BRs: 6.1.5",
    50  		Source:      CABFBaselineRequirements,
    51  		// since effective date should be checked against end date in this specific case, putting time check into checkApplies instead, ZeroDate here to automatically pass NE test
    52  		EffectiveDate: util.ZeroDate,
    53  		Lint:          &subModSize{},
    54  	})
    55  }