#include "ao.h"
+#if !HAS_AES
+#error Must define HAS_AES 1
+#endif
+
__xdata uint8_t ao_aes_mutex;
__xdata uint8_t ao_aes_done;
__xdata uint8_t ao_aes_dma_in, ao_aes_dma_out;
ao_dma_set_transfer(ao_aes_dma_in,
in,
&ENCDIXADDR,
- 7,
+ AO_AES_LEN,
DMA_CFG0_WORDSIZE_8 |
DMA_CFG0_TMODE_SINGLE |
DMA_CFG0_TRIGGER_ENC_DW,
DMA_CFG1_SRCINC_1 |
DMA_CFG1_DESTINC_0 |
DMA_CFG1_PRIORITY_LOW);
+ ao_dma_start(ao_aes_dma_in);
ao_aes_done = 0;
ENCCCS = ENCCCS_MODE_CBC_MAC |
- ENCCCS_CMD_LOAD_KEY |
- ENCCCS_START;
- while (!ao_aes_done)
+ ENCCCS_CMD_LOAD_KEY;
+ ENCCCS |= ENCCCS_START;
+ __critical while (!ao_aes_done)
ao_sleep(&ao_aes_done);
}
+void
+ao_aes_zero_iv(void)
+{
+ uint8_t b;
+
+ ENCCCS = ENCCCS_MODE_CBC_MAC | ENCCCS_CMD_LOAD_IV | ENCCCS_START;
+ for (b = 0; b < AO_AES_LEN; b++)
+ ENCDI = 0;
+}
+
void
ao_aes_run(__xdata uint8_t *in,
__xdata uint8_t *out)
ao_dma_set_transfer(ao_aes_dma_in,
in,
&ENCDIXADDR,
- 7,
+ AO_AES_LEN,
DMA_CFG0_WORDSIZE_8 |
DMA_CFG0_TMODE_SINGLE |
DMA_CFG0_TRIGGER_ENC_DW,
ao_dma_set_transfer(ao_aes_dma_out,
&ENCDOXADDR,
out,
- 7,
+ AO_AES_LEN,
DMA_CFG0_WORDSIZE_8 |
DMA_CFG0_TMODE_SINGLE |
DMA_CFG0_TRIGGER_ENC_UP,
case ao_aes_mode_cbc_mac:
if (out)
b = (ENCCCS_MODE_CBC |
- ENCCCS_CMD_ENCRYPT |
- ENCCCS_START);
+ ENCCCS_CMD_ENCRYPT);
else
b = (ENCCCS_MODE_CBC_MAC |
- ENCCCS_CMD_ENCRYPT |
- ENCCCS_START);
+ ENCCCS_CMD_ENCRYPT);
break;
default:
return;
}
ao_aes_done = 0;
- ENCCCS = b;
+ if (in)
+ ao_dma_start(ao_aes_dma_in);
if (out)
- while (!ao_aes_dma_out_done)
+ ao_dma_start(ao_aes_dma_out);
+ ENCCCS = b;
+ ENCCCS |= ENCCCS_START;
+ if (out) {
+ __critical while (!ao_aes_dma_out_done)
ao_sleep(&ao_aes_dma_out_done);
- else
- while (!ao_aes_done)
+ } else {
+ __critical while (!ao_aes_done)
ao_sleep(&ao_aes_done);
+ }
}
void
{
ao_aes_dma_in = ao_dma_alloc(&ao_aes_dma_in_done);
ao_aes_dma_out = ao_dma_alloc(&ao_aes_dma_out_done);
+ S0CON = 0;
ENCIE = 1;
}