Thanks! On Thu, Jun 3, 2010 at 4:54 PM, Dr. Stephen Henson <st...@openssl.org>wrote:
> On Thu, Jun 03, 2010, Mounir IDRASSI wrote: > > > Hi, > > > > One simple and efficient method to distinguish between PEM and DER > encoding > > for a CRL or a certificate is to read the first byte : if it's equal to > > 0x30 then this DER (this is the start of an ASN.1 Sequence) , otherwise > it > > is PEM encoded. > > This works ONLY if you are sure that the given file is either PEM or DER > > encoded and that the encoded object is an ASN.1 Sequence. > > > > Since the 0x30 byte correspond to the ASCII character '0' there is a slight > chance this will fail if the file is PEM format and contains text > before the PEM headers. This can be further reduced by checking the length > field following the SEQUENCE tag. > > Steve. > -- > Dr Stephen N. Henson. OpenSSL project core developer. > Commercial tech support now available see: http://www.openssl.org > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List openssl-users@openssl.org > Automated List Manager majord...@openssl.org >
