Sign string with PFX certificate

It is possible to sign a string, using a PFX certificate (which contains all the authenticating chain) in C-ILE or C++/ILE ?

A simple example of what I want, in C#

public byte[] SignString(string mensagem)
        {
            X509Certificate2 certificado = GetPFXCertificate();
            CmsSigner signer = new CmsSigner(SubjectIdentifierType.IssuerAndSerialNumber, certificado);
            signer.DigestAlgorithm = new Oid("2.16.840.1.101.3.4.2.1"); //SHA256

            ContentInfo content = new ContentInfo(new Oid(Configuration.ContentOid), new System.Text.UTF8Encoding().GetBytes(mensagem));
            SignedCms signedCms = new SignedCms(content, false);

            signedCms.ComputeSignature(signer, false);
            var assinatura = signedCms.Encode();

            return assinatura;
        }