[Opensc-commits] [OpenSC/OpenSC] 721259: Fix Edwards and Montgomery "field_length"

[Doug E. <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/OpenSC/OpenSC
  Commit: 72125917695362de3306ebfeb06ce518b6fc42e6
      https://github.com/OpenSC/OpenSC/commit/72125917695362de3306ebfeb06ce518b6fc42e6
  Author: Doug Engert <dee...@gm...>
  Date:   2025-06-06 (Fri, 06 Jun 2025)

  Changed paths:
    M src/libopensc/pkcs15-pubkey.c
    M src/pkcs11/framework-pkcs15.c
    M src/tools/pkcs11-tool.c
    M src/tools/pkcs15-init.c

  Log Message:
  -----------
  Fix Edwards and Montgomery "field_length"

The Edwards and Montgomery "field_length" is changed from 255
to 256 and for Ed448, 448 is changed to 456 as it needs an extra byte.

The field_length in bits, and is used to caculate number of bytes.

The BYTES4BITS(255) returns 32 and happens to work but should be BTYES4BITS(256)
so the 25519 curves have been working but not as expected. But
BYTES4BITS(448) returns 56, but Ed448 needed an extra byte so will use
BYTES4BITS(456) to return 57 as required in the RFCs.

 On branch ED448-X448-fix
 Changes to be committed:
	modified:   src/libopensc/pkcs15-pubkey.c
	modified:   src/pkcs11/framework-pkcs15.c
	modified:   src/tools/pkcs11-tool.c
	modified:   src/tools/pkcs15-init.c



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