fun addDigestAlgorithm()

in jvm/src/main/kotlin/com/jetbrains/signatureverifier/bouncycastle/cms/CMSSignedData.kt [396:443]

28 lines of code
4 McCabe index (conditional complexity)


    fun addDigestAlgorithm(
      signedData: CMSSignedData,
      digestAlgorithm: AlgorithmIdentifier
    ): CMSSignedData {
      val digestAlgorithms = signedData.digestAlgorithmIDs
      val digestAlg = CMSSignedHelper.INSTANCE.fixDigestAlgID(digestAlgorithm, dgstAlgFinder)

      //
      // if the algorithm is already present there is no need to add it.
      //
      if (digestAlgorithms.contains(digestAlg)) {
        return signedData
      }

      //
      // copy
      //
      val cms = CMSSignedData(signedData)

      //
      // build up the new set
      //
      val digestAlgs: MutableSet<AlgorithmIdentifier> = HashSet()
      val it: Iterator<*> = digestAlgorithms.iterator()
      while (it.hasNext()) {
        digestAlgs.add(CMSSignedHelper.INSTANCE.fixDigestAlgID(it.next() as AlgorithmIdentifier, dgstAlgFinder))
      }
      digestAlgs.add(digestAlg)
      val digests = CMSUtils.convertToBERSet(digestAlgs)
      val sD = signedData.signedData.toASN1Primitive() as ASN1Sequence
      val vec = ASN1EncodableVector()

      //
      // signers are the last item in the sequence.
      //
      vec.add(sD.getObjectAt(0)) // version
      vec.add(digests)
      for (i in 2 until sD.size()) {
        vec.add(sD.getObjectAt(i))
      }
      cms.signedData = SignedData.getInstance(BERSequence(vec))

      //
      // replace the contentInfo with the new one
      //
      cms.contentInfo = ContentInfo(cms.contentInfo.contentType, cms.signedData)
      return cms
    }