Topic: AES-GCM compilation problem
Dear all,
amongst other crypto blocks (HMAC-SHA256) I want to use AES-GCM in my code. In particular, I want to use wc_AesGcmSetKey(), wc_AesGcmEncrypt() and wc_AesGcmDecrypt(). For test purposes I created the file aead.c with the following content:
#include <wolfssl/wolfcrypt/aes.h>
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include "inttypes.h"
...
...
unsigned long __aead(void);
unsigned long __aead()
{
int result;
Aes enc;
// additional plaintext that is to be authenticated
// with the plaintext being encrypted
const byte addAuthData[] =
{
0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
0xab, 0xad, 0xda, 0xd2
};
const byte key[] =
{
0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c
};
const byte iv[] =
{
0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
0xde, 0xca, 0xf8, 0x88
};
const byte plaintext[] =
{
0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c
};
byte plaintextresult[sizeof(plaintext)];
byte authTag[32];
byte ciphertext[32];
// set key for AES-GCM
// wc_AesGcmSetKey(Aes* aes, const byte* key, word32 len);
wc_AesGcmSetKey(&enc, key, sizeof(key));
// perform encryption
/*
wc_AesGcmEncrypt(Aes* aes, byte* out,
const byte* in, word32 sz,
const byte* iv, word32 ivSz,
byte* authTag, word32 authTagSz,
const byte* authIn, word32 authInSz);
*/
wc_AesGcmEncrypt(&enc, ciphertext,
plaintext, sizeof(plaintext),
iv, sizeof(iv),
authTag, sizeof(authTag),
addAuthData, sizeof(addAuthData));
// perform decryption
/*
wc_AesGcmDecrypt(Aes* aes, byte* out,
const byte* in, word32 sz,
const byte* iv, word32 ivSz,
const byte* authTag, word32 authTagSz,
const byte* authIn, word32 authInSz);
*/
result = wc_AesGcmDecrypt(&enc, plaintextresult,
ciphertext, sizeof(ciphertext),
iv, sizeof(iv),
authTag, sizeof(authTag),
addAuthData, sizeof(addAuthData));
c_stop = HWREG(DWT_BASE + DWT_O_CYCCNT);
}My Makefile looks like this:
PART=LM4F120H5QR
VARIANT=cm4f
ROOT=../../..
include ${ROOT}/makedefs
VPATH=../../../third_party/FreeRTOS/Source/portable/GCC/ARM_CM4F
VPATH+=../../../third_party/FreeRTOS/Source/portable/MemMang/
VPATH+=../../../third_party/FreeRTOS/Source
VPATH+=../drivers
VPATH+=../../../utils
VPATH+=../../../utils
VPATH+=wolfcrypt/src/
VPATH+=wolfss/wolfcrypt/
IPATH=.
IPATH+=..
IPATH+=../../..
IPATH+=../../../third_party/FreeRTOS/Source/portable/GCC/ARM_CM4F
IPATH+=../../../third_party/FreeRTOS
IPATH+=../../../third_party/FreeRTOS/Source/include
IPATH+=../../../third_party
all: ${COMPILER}
all: ${COMPILER}/attest_freertos.axf
clean:
@rm -rf ${COMPILER} ${wildcard *~}
${COMPILER}:
@mkdir -p ${COMPILER}
${COMPILER}/attest_freertos.axf: ${COMPILER}/aead.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/aes.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/attest_freertos.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/buttons.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/heap_2.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/enableTiming.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/hmac.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/led_task.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/lets_hash.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/list.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/printhex.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/port.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/queue.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/rgb.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/set_key.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/sha256.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/startup_${COMPILER}.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/startup_flash.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/switch_task.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/tasks.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/uartstdio.o
${COMPILER}/attest_freertos.axf: ${COMPILER}/ustdlib.o
${COMPILER}/attest_freertos.axf: ${ROOT}/driverlib/${COMPILER}-cm4f/libdriver-cm4f.a
${COMPILER}/attest_freertos.axf: attest_freertos.ld
SCATTERgcc_attest_freertos=attest_freertos.ld
ENTRY_attest_freertos=ResetISR
CFLAGSgcc=-DTARGET_IS_BLIZZARD_RA1
ifneq (${MAKECMDGOALS},clean)
-include ${wildcard ${COMPILER}/*.d} __dummy__
endifTrying to compile the *axf file using make, the following errors pop up:
CC aead.c
In file included from ./wolfssl/wolfcrypt/types.h:27:0,
from ./wolfssl/wolfcrypt/aes.h:25,
from aead.c:1:
./wolfssl/wolfcrypt/wc_port.h:104:33: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'wolfSSL_Mutex'
./wolfssl/wolfcrypt/wc_port.h:167:42: error: expected ')' before '*' token
./wolfssl/wolfcrypt/wc_port.h:168:42: error: expected ')' before '*' token
./wolfssl/wolfcrypt/wc_port.h:169:42: error: expected ')' before '*' token
./wolfssl/wolfcrypt/wc_port.h:170:44: error: expected ')' before '*' token
aead.c: In function '__aead':
aead.c:73:2: warning: implicit declaration of function 'wc_AesGcmSetKey'
aead.c:84:2: warning: implicit declaration of function 'wc_AesGcmEncrypt'
aead.c:98:2: warning: implicit declaration of function 'wc_AesGcmDecrypt'
../../../makedefs:189: recipe for target 'gcc/aead.o' failed
make: *** [gcc/aead.o] Error 1This is strange as I was able to successfully use other crypto primitives (SHA-1, HMAC) this way.
What am I missing?
Best regards.