feat(hal): add support for ESP32-P4 ECO5 ECC peripheral

This commit also enabled constant time mode for ECC.

Author: nileshkale123

components/hal/esp32p4/include/hal/ecc_ll.h

@@ -9,8 +9,11 @@
 #include <string.h>
 #include "hal/assert.h"
 #include "hal/ecc_types.h"
+#include "hal/efuse_hal.h"
 #include "soc/ecc_mult_reg.h"
 #include "soc/hp_sys_clkrst_struct.h"
+#include "soc/chip_revision.h"
+#include "hal/config.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -118,16 +121,15 @@ static inline void ecc_ll_set_mode(ecc_mode_t mode)
 
 static inline void ecc_ll_set_curve(ecc_curve_t curve)
 {
-    switch(curve) {
-        case ECC_CURVE_SECP256R1:
-            REG_SET_BIT(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH);
-            break;
+    switch (curve) {
         case ECC_CURVE_SECP192R1:
-            REG_CLR_BIT(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH);
+        case ECC_CURVE_SECP256R1:
+        case ECC_CURVE_SECP384R1:
+        case ECC_CURVE_SM2:
+            REG_SET_FIELD(ECC_MULT_CONF_REG, ECC_MULT_KEY_LENGTH, curve);
             break;
         default:
             HAL_ASSERT(false && "Unsupported curve");
-            return;
     }
 }
 
@@ -242,8 +244,11 @@ static inline void ecc_ll_read_param(ecc_ll_param_t param, uint8_t *buf, uint16_
 
 static inline void ecc_ll_enable_constant_time_point_mul(bool enable)
 {
-    // Not supported for ESP32-P4
-    (void) enable; //unused
+    if (enable) {
+        REG_SET_BIT(ECC_MULT_CONF_REG, ECC_MULT_SECURITY_MODE);
+    } else {
+        REG_CLR_BIT(ECC_MULT_CONF_REG, ECC_MULT_SECURITY_MODE);
+    }
 }
 
 #ifdef __cplusplus

components/soc/esp32p4/include/soc/Kconfig.soc_caps.in

@@ -1495,6 +1495,10 @@ config SOC_SHA_SUPPORT_SHA512_T
     bool
     default y
 
+config SOC_ECC_CONSTANT_TIME_POINT_MUL
+    bool
+    default y
+
 config SOC_ECDSA_SUPPORT_EXPORT_PUBKEY
     bool
     default y

components/soc/esp32p4/include/soc/soc_caps.h

@@ -547,6 +547,9 @@
 #define SOC_SHA_SUPPORT_SHA512_256      (1)
 #define SOC_SHA_SUPPORT_SHA512_T        (1)
 
+/*--------------------------- ECC CAPS ---------------------------------------*/
+#define SOC_ECC_CONSTANT_TIME_POINT_MUL           1
+
 /*--------------------------- ECDSA CAPS ---------------------------------------*/
 #define SOC_ECDSA_SUPPORT_EXPORT_PUBKEY     (1)
 #define SOC_ECDSA_SUPPORT_DETERMINISTIC_MODE   (1)