Hello, the actual data of /Contents is a byte array (encoded as an hexadecimal string, in your example) is historically/often a PKCS7 signature. This is described in "12.8.3.3 PKCS#7 Signatures as used in ISO 32000" in ISO 32000-1:2008. Nowadays the signatures are CMS[1] (Cryptographic Message Syntax) structures (often they are compatible with PKCS#7) as described in "12.8.3.4 CAdES signatures as used in PDF" in ISO 32000-2:2020. podofosign tool and litePDF[1] have examples dealing with PKCS7 structures.
Greetings, Francesco [1] https://en.wikipedia.org/wiki/Cryptographic_Message_Syntax [2] https://litepdf.sourceforge.io/ On Thu, 3 Mar 2022 at 12:18, 工作邮箱 <iwifi...@163.com> wrote: > > Hi, > I signed pdf successfully using podofo,but I don't know the encode type > of the signature value,the signature value likes as the following: > > /Contents<308206DC06092A864886F70D010702A08206CD308206C9020101310B300906052B0E03021A05 > > Could someone tell the encode type of the signature value? > > Kingly > regards， > > > > > > > > _______________________________________________ > Podofo-users mailing list > Podofo-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/podofo-users _______________________________________________ Podofo-users mailing list Podofo-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/podofo-users
