Function certtoIssuerSerialHex

certtoIssuerSerialHex(certPEM): string

get IssuerSerial hexadecimal value from certificate PEM

Parameters

certPEM: string
PEM certificate

Returns string

hexadecimal string of ASN.1 IssuerSerial of certificate

Description

This function will return a hexadecimal string of IssuerSerial of the certificate.

IssuerSerial ::= SEQUENCE {
  issuer          GeneralNames,
  serialNumber    CertificateSerialNumber }

Here is a ASN.1 dump of an hexadecimal string output of this function.

SEQUENCE {
  SEQUENCE {
    [4] {
      SEQUENCE {
        SET {
          SEQUENCE {
            OBJECT IDENTIFIER countryName (2 5 4 6)
            PrintableString 'JP'
            }
          }
        SET {
          SEQUENCE {
            OBJECT IDENTIFIER organizationName (2 5 4 10)
            UTF8String 'T-P256-ES-256'
            }
          }
        }
      }
    }
  INTEGER 1
  }

Since

0.2.0

See

RFC5035 Section 4. IssuerSerial

Example

certtoIssuerSerialHex("-----BEGIN CERT...") -> "302531..."