On 24.07.2018 11:41, Jakob Bohm wrote: > Best option is to download the documents that specify the DER > (or BER) ASN.1 Encoding, which is the X.690 (2015) ITU-T > "recommendation" which was a freely downloadable PDF last time > I checked. […] > For example, the one you show below is thus: > 0x30 (TAG for SEQUENCE) > Some length value large enough to hold what follows, see X.690 > 0x06 (TAG for OBJECT id) > Any definite encoding of length = 9 bytes(127 possibilities) > 0x2A (The bytes of pkcs7-envelopedData=1.2.840.113549.1.7.3) > 0x86 .840 > 0x48 > 0x86 .113549 > 0xF7 > 0x0D > 0x01 .1 > 0x07 .7 > 0x03 .3 > Rest not needed for identification of a pkcs7-envelopedData file. > > Note that same length values can be encoded in more than one way > if the file is in BER format, as is often the case with PKCS#7 > files. Thanks heaps for your input. Much appreciated! Cheers, Christian -- *Christian Böhme* Developer System Integration CLOUD&HEAT *CLOUD & HEAT Technologies GmbH* Königsbrücker Str. 96 (Halle 15) | 01099 Dresden Tel: +49 351 479 3670 - 100 Fax: +49 351 479 3670 - 110 E-Mail: christian.boehme@xxxxxxxxxxxxxxxx <mailto:christian.boehme@xxxxxxxxxxxxxxxx> Web: https://www.cloudandheat.com <https://www.cloudandheat.com> Handelsregister: Amtsgericht Dresden Registernummer: HRB 30549 USt.-Ident.-Nr.: DE281093504 Geschäftsführer: Nicolas Röhrs
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