tree 7fbad1852deba37b65ae8453f7566828d3affbce
parent 51d13aaf59779ff4d13f1def2c72ae102a1aad40
author Ard Biesheuvel <ard.biesheuvel@linaro.org> 1571824244 +0200
committer Herbert Xu <herbert@gondor.apana.org.au> 1572586711 +0800

crypto: ecdh - fix big endian bug in ECC library

The elliptic curve arithmetic library used by the EC-DH KPP implementation
assumes big endian byte order, and unconditionally reverses the byte
and word order of multi-limb quantities. On big endian systems, the byte
reordering is not necessary, while the word ordering needs to be retained.

So replace the __swab64() invocation with a call to be64_to_cpu() which
should do the right thing for both little and big endian builds.

Fixes: 3c4b23901a0c ("crypto: ecdh - Add ECDH software support")
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>