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 <[email protected]>
Mbed-TLS · Oct 12, 2023 · 1222ae6 · 1222ae6
1 parent 44af436
commit 1222ae6
Showing 1 changed file with 6 additions and 6 deletions.
diff --git a/library/aes.c b/library/aes.c
@@ -334,7 +334,7 @@ static const uint32_t RT3[256] = { RT };
 /*
  * 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 @@ static uint32_t RT3[256];
 /*
  * Round constants
  */
-static uint32_t RCON[10];
+static uint32_t round_constants[10];
 
 /*
  * Tables generation code
@@ -411,7 +411,7 @@ static void aes_gen_tables(void)
      * 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 @@ int mbedtls_aes_setkey_enc(mbedtls_aes_context *ctx, const unsigned char *key,
         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 @@ int mbedtls_aes_setkey_enc(mbedtls_aes_context *ctx, const unsigned char *key,
         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 @@ int mbedtls_aes_setkey_enc(mbedtls_aes_context *ctx, const unsigned char *key,
         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) ^