Part Number: CC2745R10-Q1
Tool/software:
Hi,
I ran the sample code at the URL below, but the return value of ECDSA_sign is -32.
What could be the cause?
ECDSA_ReturnBehavior is set with ECDSA_RETURN_BEHAVIOR_CALLBACK.
The same phenomenon occurs with ECDSA_RETURN_BEHAVIOR_BLOCKING.
The source code used is also attached.
[Conditions]
SDK:simplelink_lowpower_f3_sdk_8_30_00_11_ea
[URL]
software-dl.ti.com/.../_e_c_d_s_a_8h.html
[Sample]
ECDSA sign with plaintext CryptoKeys for CC27XX and CC35XX devices
Best Regards,
Katsuya
/*
* ======== empty.c ========
*/
/* For usleep() */
#include <unistd.h>
#include <stdint.h>
#include <stddef.h>
#include <ti/drivers/cryptoutils/cryptokey/CryptoKeyPlaintext.h>
#include <ti/drivers/cryptoutils/cryptokey/CryptoKeyKeyStore_PSA_init.h>
#include <ti/drivers/cryptoutils/cryptokey/CryptoKeyKeyStore_PSA_helpers.h>
#include <ti/drivers/ECDSA.h>
/* Driver Header files */
#include <ti/drivers/GPIO.h>
// #include <ti/drivers/I2C.h>
// #include <ti/drivers/SPI.h>
// #include <ti/drivers/Watchdog.h>
/* Driver configuration */
#include "ti_drivers_config.h"
static void ECDSA_Callback(
ECDSA_Handle ecdsaHandle,
int_fast16_t s2t_ReturnStatus,
ECDSA_Operation stt_Operation,
ECDSA_OperationType s4t_OperationType);
static void startecdsa( void);
int_fast16_t operationResult;
/*
* ======== mainThread ========
*/
uint8_t myPrivateKeyingMaterial[32] = {0x96, 0xBF, 0x85, 0x49, 0xC3, 0x79, 0xE4, 0x04,
0xED, 0xA1, 0x08, 0xA5, 0x51, 0xF8, 0x36, 0x23,
0x12, 0xD8, 0xD1, 0xB2, 0xA5, 0xFA, 0x57, 0x06,
0xE2, 0xCC, 0x22, 0x5C, 0xF6, 0xF9, 0x77, 0xC4};
uint8_t messageHash[32] = {0xA4,0x1A,0x41,0xA1,0x2A,0x79,0x95,0x48,
0x21,0x1C,0x41,0x0C,0x65,0xD8,0x13,0x3A,
0xFD,0xE3,0x4D,0x28,0xBD,0xD5,0x42,0xE4,
0xB6,0x80,0xCF,0x28,0x99,0xC8,0xA8,0xC4};
uint8_t r[32];
uint8_t s[32];
static void ECDSA_Callback(
ECDSA_Handle ecdsaHandle,
int_fast16_t s2t_ReturnStatus,
ECDSA_Operation stt_Operation,
ECDSA_OperationType s4t_OperationType)
{
if( ECDSA_STATUS_SUCCESS == s2t_ReturnStatus )
{
}
}
static void startecdsa( void )
{
CryptoKey myPrivateKey;
ECDSA_Handle ecdsaHandle;
ECDSA_OperationSign operationSign;
ECDSA_Params ECDSA_params;
// Since we are using default ECDSA_Params, we just pass in NULL for that parameter.
ECDSA_init();
ECDSA_Params_init( &ECDSA_params );
ECDSA_params.returnBehavior = ECDSA_RETURN_BEHAVIOR_CALLBACK;
ECDSA_params.callbackFxn = ECDSA_Callback;
ecdsaHandle = ECDSA_open(0, &ECDSA_params);
// Since the ECDSA driver for CC27XX and CC35XX relies on one HW engine (the HSM) for all of its operations
// If the HSM boot up sequence fails, ECDSA_open() will return NULL.
if (!ecdsaHandle) {
// Handle error
}
// Initialize myPrivateKey
CryptoKeyPlaintextHSM_initKey(&myPrivateKey,
myPrivateKeyingMaterial,
sizeof(myPrivateKeyingMaterial));
//CryptoKeyPlaintext_initKey(&myPrivateKey,
// myPrivateKeyingMaterial,
// sizeof(myPrivateKeyingMaterial));
// Initialize the operation
// For CC27XX and CC35XX devices, you must specify the curveType instead of providing a pointer to the curve like
// the case with other devices.
ECDSA_OperationSign_init(&operationSign);
operationSign.curve = &ECCParams_NISTP256;
operationSign.myPrivateKey = &myPrivateKey;
operationSign.hash = messageHash;
operationSign.r = r;
operationSign.s = s;
// Generate the signature
operationResult = ECDSA_sign(ecdsaHandle, &operationSign); // ← Return -32
if (operationResult != ECDSA_STATUS_SUCCESS) {
// Handle error
}
}
void *mainThread(void *arg0)
{
/* 1 second delay */
uint32_t time = 1;
startecdsa();
while (1)
{
sleep(time);
//GPIO_toggle(CONFIG_GPIO_LED_0);
}
}
