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gpg: Fix modifying signature data by pk_verify for Ed25519.
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Description

gpg: Fix modifying signature data by pk_verify for Ed25519.

* g10/pkglue.c (pk_verify): When fixing R and S, make sure those are
copies.

Fixing-commit: 0a5a854510fda6e6990938a3fca424df868fe676

  • GnuPG-bug-id: T7426
  • Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

Details

Provenance
• gniibeAuthored on Mon, Nov 25, 6:39 AM
Parents
rGbb6b38c24010: gpg: Fix comparing ed448 vs ed25519 with --assert-pubkey-algo.
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References
gniibe/t7426

Event Timeline

• gniibe mentioned this in T7426: Retain binary representation of key for import->export (in particular, Ed25519 signature).Mon, Nov 25, 7:08 AM
• werner added a subscriber: • werner.Mon, Nov 25, 9:15 AM
• werner added inline comments.
/g10/pkglue.c
339

Nipicking: If only one copy fails we won't free the already allocated other one. ERRNO might also not be the correct one if r = ... failed.

360

The R copied about leaks. Same for S a few lines down.

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