[v2,0/2] crypto: ecdh & ecc: Fix private key byte ordering issues

Message

Stefan Berger April 17, 2024, 4:21 p.m. UTC

The 1st patch fixes a byte ordering issue where ctx->private_key is
currently passed to ecc_is_key_valid but the key is in reverse byte order.
To solve this issue it introduces the variable 'priv' that is already used
throughout the ecc and ecdh code bases for a private key in proper byte
order and calls the function with 'priv'.

The 2nd patch gets rid of the 'priv' variable wherever it is used to hold
a private key (byte-swapped initialized from ctx->private_key) in proper
byte order and uses ctx->private_key directly that is now initialized in
proper byte order.

Regards,
  Stefan

v2:
  - Added missing zeroizing of priv variable (1/2)
  - Improved patch description (2/2)


Stefan Berger (2):
  crypto: ecdh - Pass private key in proper byte order to check valid
    key
  crypto: ecdh & ecc - Initialize ctx->private_key in proper byte order

 crypto/ecc.c                  | 29 ++++++++++-------------------
 crypto/ecdh.c                 |  9 ++++++---
 include/crypto/internal/ecc.h |  3 ++-
 3 files changed, 18 insertions(+), 23 deletions(-)