commit 1222ae67d5e33dc972cca35d56c65e4d37480163
author Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl> Thu Oct 12 09:16:34 2023 +0200
committer Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl> Thu Oct 12 09:16:34 2023 +0200
tree 9f79a421629ef6f0e81d79157b13fd7449e76100
parent 44af43639c5fdb97f69943c1a56bf06027e4be0f

Rename local variable in aes.c

This changes local variable name RCON to round_constants.

RCON being definition in xc32 compiler headers for some PIC32 register.
Without this change mynewt project for PIC32 platform fails to build due to
macro redefinition.

This does not changes behavior of library in any way.

Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>

library/aes.c

diff --git a/library/aes.c b/library/aes.c
index d2a3c89..683480a 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -334,7 +334,7 @@
 /*
  * Round constants
  */
-static const uint32_t RCON[10] =
+static const uint32_t round_constants[10] =
 {
     0x00000001, 0x00000002, 0x00000004, 0x00000008,
     0x00000010, 0x00000020, 0x00000040, 0x00000080,
@@ -381,7 +381,7 @@
 /*
  * Round constants
  */
-static uint32_t RCON[10];
+static uint32_t round_constants[10];
 
 /*
  * Tables generation code
@@ -411,7 +411,7 @@
      * calculate the round constants
      */
     for (i = 0, x = 1; i < 10; i++) {
-        RCON[i] = (uint32_t) x;
+        round_constants[i] = (uint32_t) x;
         x = MBEDTLS_BYTE_0(XTIME(x));
     }
 
@@ -637,7 +637,7 @@
         case 10:
 
             for (i = 0; i < 10; i++, RK += 4) {
-                RK[4]  = RK[0] ^ RCON[i] ^
+                RK[4]  = RK[0] ^ round_constants[i] ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_1(RK[3])]) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_2(RK[3])] <<  8) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_3(RK[3])] << 16) ^
@@ -652,7 +652,7 @@
         case 12:
 
             for (i = 0; i < 8; i++, RK += 6) {
-                RK[6]  = RK[0] ^ RCON[i] ^
+                RK[6]  = RK[0] ^ round_constants[i] ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_1(RK[5])]) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_2(RK[5])] <<  8) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_3(RK[5])] << 16) ^
@@ -669,7 +669,7 @@
         case 14:
 
             for (i = 0; i < 7; i++, RK += 8) {
-                RK[8]  = RK[0] ^ RCON[i] ^
+                RK[8]  = RK[0] ^ round_constants[i] ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_1(RK[7])]) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_2(RK[7])] <<  8) ^
                          ((uint32_t) FSb[MBEDTLS_BYTE_3(RK[7])] << 16) ^