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Failure to export plaintext v5 secret key.
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I'm investigating GnuPG v5 functionality, so modified GnuPG sources to always generate v5 keys. This works (including using generated keys with GnuPG 2.4.0), however attempt to export non-encrypted secret key fails, producing the following packet dump for RSA key:

# off=0 ctb=95 tag=5 hlen=3 plen=2921
:secret key packet:
	version 5, algo 1, created 1686657810, expires 0, pkbytes 391
	pkey[0]: [3072 bits]
	pkey[1]: [17 bits]
	protbytes: 0
	skbytes: 201210263
	skey[2]: [MPI_NULL]
	skey[3]: [2685 bits]
	skey[4]: [MPI_NULL]
	skey[5]: [MPI_NULL]
# off=2924 ctb=b4 tag=13 hlen=2 plen=6
:user ID packet: "v5_rsa"

For encrypted secret key export/import back works well.



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werner added a subscriber: werner.

Thanks, we will take care of this.

I general think it will be better if we use the new OCB format for exporting secret v5 keys. m However, this has not yet been implemented.

werner triaged this task as Normal priority.Jun 13 2023, 7:41 PM