Add a dhrystone benchmark command

[karo-tx-uboot.git] / lib / aes.c

diff --git a/lib/aes.c b/lib/aes.c
index e996b273ac8633adfaea3d8ee3e2eb63e81c06b8..9d7a0a1c11850ac76eda5e66715bbc18f534d87b 100644 (file)
--- a/lib/aes.c
+++ b/lib/aes.c
@@ -22,7 +22,11 @@
  * REDISTRIBUTION OF THIS SOFTWARE.
 */
 
+#ifndef USE_HOSTCC
 #include <common.h>
+#else
+#include <string.h>
+#endif
 #include "aes.h"
 
 /* forward s-box */
@@ -580,3 +584,74 @@ void aes_decrypt(u8 *in, u8 *expkey, u8 *out)
 
        memcpy(out, state, sizeof(state));
 }
+
+static void debug_print_vector(char *name, u32 num_bytes, u8 *data)
+{
+#ifdef DEBUG
+       printf("%s [%d] @0x%08x", name, num_bytes, (u32)data);
+       print_buffer(0, data, 1, num_bytes, 16);
+#endif
+}
+
+void aes_apply_cbc_chain_data(u8 *cbc_chain_data, u8 *src, u8 *dst)
+{
+       int i;
+
+       for (i = 0; i < AES_KEY_LENGTH; i++)
+               *dst++ = *src++ ^ *cbc_chain_data++;
+}
+
+void aes_cbc_encrypt_blocks(u8 *key_exp, u8 *src, u8 *dst, u32 num_aes_blocks)
+{
+       u8 zero_key[AES_KEY_LENGTH] = { 0 };
+       u8 tmp_data[AES_KEY_LENGTH];
+       /* Convenient array of 0's for IV */
+       u8 *cbc_chain_data = zero_key;
+       u32 i;
+
+       for (i = 0; i < num_aes_blocks; i++) {
+               debug("encrypt_object: block %d of %d\n", i, num_aes_blocks);
+               debug_print_vector("AES Src", AES_KEY_LENGTH, src);
+
+               /* Apply the chain data */
+               aes_apply_cbc_chain_data(cbc_chain_data, src, tmp_data);
+               debug_print_vector("AES Xor", AES_KEY_LENGTH, tmp_data);
+
+               /* Encrypt the AES block */
+               aes_encrypt(tmp_data, key_exp, dst);
+               debug_print_vector("AES Dst", AES_KEY_LENGTH, dst);
+
+               /* Update pointers for next loop. */
+               cbc_chain_data = dst;
+               src += AES_KEY_LENGTH;
+               dst += AES_KEY_LENGTH;
+       }
+}
+
+void aes_cbc_decrypt_blocks(u8 *key_exp, u8 *src, u8 *dst, u32 num_aes_blocks)
+{
+       u8 tmp_data[AES_KEY_LENGTH], tmp_block[AES_KEY_LENGTH];
+       /* Convenient array of 0's for IV */
+       u8 cbc_chain_data[AES_KEY_LENGTH] = { 0 };
+       u32 i;
+
+       for (i = 0; i < num_aes_blocks; i++) {
+               debug("encrypt_object: block %d of %d\n", i, num_aes_blocks);
+               debug_print_vector("AES Src", AES_KEY_LENGTH, src);
+
+               memcpy(tmp_block, src, AES_KEY_LENGTH);
+
+               /* Decrypt the AES block */
+               aes_decrypt(src, key_exp, tmp_data);
+               debug_print_vector("AES Xor", AES_KEY_LENGTH, tmp_data);
+
+               /* Apply the chain data */
+               aes_apply_cbc_chain_data(cbc_chain_data, tmp_data, dst);
+               debug_print_vector("AES Dst", AES_KEY_LENGTH, dst);
+
+               /* Update pointers for next loop. */
+               memcpy(cbc_chain_data, tmp_block, AES_KEY_LENGTH);
+               src += AES_KEY_LENGTH;
+               dst += AES_KEY_LENGTH;
+       }
+}