Diffusion libgcrypt 0b794c208db3

cipher:(EC)DSA: Avoid MPI normalize by mpi_rshift.
0b794c208db3
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Description

cipher:(EC)DSA: Avoid MPI normalize by mpi_rshift.

* cipher/dsa-common.c (_gcry_dsa_gen_rfc6979_k): Use
_gcry_mpi_set_buffer and _gcry_mpih_rshift, instead of _gcry_mpi_scan
and mpi_rshift.

GnuPG-bug-id: T7519
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

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Authored on Mon, Feb 17, 6:15 AM

Parents

rCd05cdb31689a: cipher:(EC)DSA: Fix _gcry_dsa_modify_k to least leak.

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T7519: libgcrypt: (EC)DSA signature generation should be constant-time

Event Timeline

• gniibe committed rC0b794c208db3: cipher:(EC)DSA: Avoid MPI normalize by mpi_rshift. (authored by • gniibe).Tue, Feb 18, 3:17 AM

• gniibe added a task: T7519: libgcrypt: (EC)DSA signature generation should be constant-time.

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cipher/

rC0b794c208db3

cipher/dsa-common.c

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