feat(pki): add support of flatten rdn structure

[amphineko]

Creating a more compatible RelativeDistinguishedNames, which replacing one set of multiple DN elements with individual sets for each element by overriding serialization.

Fix #19.

The solution is originally posted by @YuryStrozhevsky in PeculiarVentures/PKI.js#169 (comment)

[DariusSG]

Fix for proper encoding of issuer

1. Change usage of BmpString to PrintableString

2. Re-encode the issuer subject instead of using it directly

*** utils_new.ts        Sun Jun  2 21:13:35 2024
--- utils.ts    Sun Jun  2 21:14:06 2024
***************
*** 117,124 ****
          if (!(issuer instanceof PkijsCertificate)) {
              throw new Error("Cannot derive issuer's subject from non-Pkijs certificate factory")
          }
!         const issuer_subject = convertPkijsRdnToRdn(issuer.pkijsCertificate.subject)
!         cert.issuer = convertRdnToPkijsRdn(issuer_subject)
      } else {
          cert.issuer = cert.subject
      }
--- 117,123 ----
          if (!(issuer instanceof PkijsCertificate)) {
              throw new Error("Cannot derive issuer's subject from non-Pkijs certificate factory")
          }
!         cert.issuer = issuer.pkijsCertificate.subject
      } else {
          cert.issuer = cert.subject
      }
***************
*** 141,144 ****
  export function getSerialNumberFromCertificate(cert: pkijs.Certificate): string {
      return Buffer.from(cert.serialNumber.valueBlock.valueHexView).toString("hex").toLowerCase()
  }
- 
--- 140,142 ----

[amphineko]

@DariusSG Thanks for your input.

Based on your suggestions I also migrated the RDN structure of issuers, and used PrintableString instead. Can you confirm if it works?

Tip: You can use the Docker image generated for this PR.

[DariusSG]

Based on your suggestions I also migrated the RDN structure of issuers, and used PrintableString instead. Can you confirm if it works?

Yep, It works. You can merge it.