Commit 3a23516b authored by Scott Vokes's avatar Scott Vokes
Browse files

Add logging of HMAC data (disabled by default).

parent 67a50287

src/lib/kinetic_hmac.c

+16 −0
Original line number Diff line number Diff line
@@ -107,6 +107,8 @@ bool KineticHMAC_Validate(const KineticProto_Message* msg, 


#pragma GCC diagnostic ignored "-Wdeprecated-declarations"



#define LOG_HMAC 0



static void KineticHMAC_Compute(KineticHMAC* hmac,

                                const KineticProto_Message* msg,

                                const ByteArray key)
@@ -123,6 +125,20 @@ static void KineticHMAC_Compute(KineticHMAC* hmac, 


    HMAC_CTX ctx;

    HMAC_CTX_init(&ctx);

#if LOG_HMAC

    fprintf(stderr, "\n\nUsing hmac key [%zd]: '%s' and length '", key.len, key.data);

    for (size_t i = 0; i < sizeof(uint32_t); i++) {

        fprintf(stderr, "%02x", ((uint8_t *)&lenNBO)[i]);

    }

    

    fprintf(stderr, "' on data: \n");

    for (size_t i = 0; i < msg->commandBytes.len; i++) {

        fprintf(stderr, "%02x", msg->commandBytes.data[i]);

        if (i > 0 && (i & 15) == 15) { fprintf(stderr, "\n"); }

    }

    fprintf(stderr, "\n\n");

#endif



    HMAC_Init_ex(&ctx, key.data, key.len, EVP_sha1(), NULL);

    HMAC_Update(&ctx, (uint8_t*)&lenNBO, sizeof(uint32_t));

    HMAC_Update(&ctx, msg->commandBytes.data, msg->commandBytes.len);