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The private key in ctx->private_key is currently initialized in reverse
byte order in ecdh_set_secret and whenever the key is needed in proper
byte order the variable priv is introduced and the bytes from
ctx->private_key are copied into priv while being byte-swapped
(ecc_swap_digits). To get rid of the unnecessary byte swapping initialize
ctx->private_key in proper byte order and clean up all functions that were
previously using priv or were called with ctx->private_key:
- ecc_gen_privkey: Directly initialize the passed ctx->private_key with
random bytes filling all the digits of the private key. Get rid of the
priv variable. This function only has ecdh_set_secret as a caller to
create NIST P192/256/384 private keys.
- crypto_ecdh_shared_secret: Called only from ecdh_compute_value with
ctx->private_key. Get rid of the priv variable and work with the passed
private_key directly.
- ecc_make_pub_key: Called only from ecdh_compute_value with
ctx->private_key. Get rid of the priv variable and work with the passed
private_key directly.
Cc: Salvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
01474b70a7