I have a question about commits rG3151210 and rG90c3d62

Topic:

• rG3151210e455f: gpg: Fix counting buffer size in check_signature2. is to match later call of gcry_mpi_print
• rG90c3d623ce37: gpg: Fix debug output for key_check_all_keysigs with opaque MPI. is handling opaque MPI of ECC signature

Last week:

• Fixed T5100: OpenPGP app overwrites Yubikey serial number
• Fixed T5075: [python-gpgme] Traceback when running with python -OO
• Fixed T5114: GnuPG fails to import back generated and exported EdDSA secret key.:
  • gpg-agent (<= 2.2) adding 0x00 at the beginning of MPI for Ed25519
• Created T5116: GnuPG master shows an error when importing Ed25519 keys generated

This week:

• Check more about zero-byte issue
• In master, for ECC, we use SOS encoding
  • public key (with prefix of 0x40 for Ed25519, native)
  • secret key (native)
  • R in the signature (native, where we don't put 0x40)
  • S in the signature (native, little endian for Ed25519 and Ed448)
  • confirm throughout-fully about compatibility when using 2.2

Topic:

• Maybe discuss T5100#138465, i.e. "app specific serialno" vs. "canonical serialno" (see also T5100#138506).

Last week:

• Fixed T5108: Superfluous back button in Kleo's card manager
• T5094: Kleopatra: Add "revsig" support
  • added support for --quick-revoke-sig to gpgme, gpgmepp, qgpgme
• Tested fix of T5100: OpenPGP app overwrites Yubikey serial number with Kleopatra

This week:

• T5094: Kleopatra: Add "revsig" support
  • add support to Kleopatra

okay, I understand rG3151210 and rG90c3d62