private static ILoaderPal FromBio(SafeBioHandle bio, SafePasswordHandle password)
{
int bioPosition = Interop.Crypto.BioTell(bio);
Debug.Assert(bioPosition >= 0);
ICertificatePal singleCert;
if (OpenSslX509CertificateReader.TryReadX509Pem(bio, out singleCert))
{
return(SingleCertToLoaderPal(singleCert));
}
// Rewind, try again.
OpenSslX509CertificateReader.RewindBio(bio, bioPosition);
if (OpenSslX509CertificateReader.TryReadX509Der(bio, out singleCert))
{
return(SingleCertToLoaderPal(singleCert));
}
// Rewind, try again.
OpenSslX509CertificateReader.RewindBio(bio, bioPosition);
List <ICertificatePal> certPals;
if (PkcsFormatReader.TryReadPkcs7Pem(bio, out certPals))
{
return(ListToLoaderPal(certPals));
}
// Rewind, try again.
OpenSslX509CertificateReader.RewindBio(bio, bioPosition);
if (PkcsFormatReader.TryReadPkcs7Der(bio, out certPals))
{
return(ListToLoaderPal(certPals));
}
// Rewind, try again.
OpenSslX509CertificateReader.RewindBio(bio, bioPosition);
// Capture the exception so in case of failure, the call to BioSeek does not override it.
Exception openSslException;
if (PkcsFormatReader.TryReadPkcs12(bio, password, out certPals, out openSslException))
{
return(ListToLoaderPal(certPals));
}
// Since we aren't going to finish reading, leaving the buffer where it was when we got
// it seems better than leaving it in some arbitrary other position.
//
// Use BioSeek directly for the last seek attempt, because any failure here should instead
// report the already created (but not yet thrown) exception.
if (Interop.Crypto.BioSeek(bio, bioPosition) < 0)
{
Interop.Crypto.ErrClearError();
}
Debug.Assert(openSslException != null);
throw openSslException;
}
public X509ContentType GetCertContentType(string fileName)
{
// If we can't open the file, fail right away.
using (SafeBioHandle fileBio = Interop.Crypto.BioNewFile(fileName, "rb"))
{
Interop.Crypto.CheckValidOpenSslHandle(fileBio);
int bioPosition = Interop.Crypto.BioTell(fileBio);
Debug.Assert(bioPosition >= 0);
// X509ContentType.Cert
{
ICertificatePal certPal;
if (OpenSslX509CertificateReader.TryReadX509Der(fileBio, out certPal))
{
certPal.Dispose();
return(X509ContentType.Cert);
}
OpenSslX509CertificateReader.RewindBio(fileBio, bioPosition);
if (OpenSslX509CertificateReader.TryReadX509Pem(fileBio, out certPal))
{
certPal.Dispose();
return(X509ContentType.Cert);
}
OpenSslX509CertificateReader.RewindBio(fileBio, bioPosition);
}
// X509ContentType.Pkcs7
{
if (PkcsFormatReader.IsPkcs7Der(fileBio))
{
return(X509ContentType.Pkcs7);
}
OpenSslX509CertificateReader.RewindBio(fileBio, bioPosition);
if (PkcsFormatReader.IsPkcs7Pem(fileBio))
{
return(X509ContentType.Pkcs7);
}
OpenSslX509CertificateReader.RewindBio(fileBio, bioPosition);
}
// X509ContentType.Pkcs12 (aka PFX)
{
OpenSslPkcs12Reader pkcs12Reader;
if (OpenSslPkcs12Reader.TryRead(fileBio, out pkcs12Reader))
{
pkcs12Reader.Dispose();
return(X509ContentType.Pkcs12);
}
OpenSslX509CertificateReader.RewindBio(fileBio, bioPosition);
}
}
// Unsupported format.
// Windows throws new CryptographicException(CRYPT_E_NO_MATCH)
throw new CryptographicException();
}
