Building a DER sequence

Salz, Rich rsalz at
Wed Jun 26 15:34:14 UTC 2019

    Do I construct a sequence and add items to it - top down?

No, because then you have to go back and patch the sequence length and perhaps slide everything up or down a copule of bytes.

I would look at an existing simple sequence and start writing your own based on that; look for ASN1_SEQUENCE macros in crypto/x509/x*.c files.  Another set of macros will declare the i2d/d2i and PEM functions if needed.

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