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2018-08-22backports: add header file for function memcmpWinnie Chang
Function memcmp is implicit declaration on kernel 4.9.88 ARM platform. backport-include/keys/asymmetric-type.h uses function memcmp but its caller compat/verification/verify.c and all its related header files do not include string.h. The header file is usually included from arch/arm/include/asm, but in this configuration, it doesn't. We need to be safe and insure string.h is there. Signed-off-by: Winnie Chang <winnie.chang@cypress.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-10-13backports: add signature verification codeJohannes Berg
Uh, this was awful. Because the crypto/ things are completely impossible to backport, I've actually implemented this by using mbedtls and embedding the relevant functions it has... The mbedtls code is taken from mbedtls version 2.6.0 and only minimally modified (mostly to remove <string.h> and similar). Signed-off-by: Johannes Berg <johannes.berg@intel.com>