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pkcs11_token.c
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pkcs11_token.c
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/**
* \file
* \brief PKCS11 Library Token Handling
*
* \copyright (c) 2017 Microchip Technology Inc. and its subsidiaries.
* You may use this software and any derivatives exclusively with
* Microchip products.
*
* \page License
*
* (c) 2017 Microchip Technology Inc. and its subsidiaries. You may use this
* software and any derivatives exclusively with Microchip products.
*
* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER
* EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY IMPLIED
* WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A
* PARTICULAR PURPOSE, OR ITS INTERACTION WITH MICROCHIP PRODUCTS, COMBINATION
* WITH ANY OTHER PRODUCTS, OR USE IN ANY APPLICATION.
*
* IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE,
* INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND
* WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS
* BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE
* FULLEST EXTENT ALLOWED BY LAW, MICROCHIPS TOTAL LIABILITY ON ALL CLAIMS IN
* ANY WAY RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
*
* MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE
* TERMS.
*/
#include "pkcs11_config.h"
#include "pkcs11_debug.h"
#include "pkcs11_token.h"
#include "pkcs11_slot.h"
#include "pkcs11_info.h"
#include "pkcs11_util.h"
#include "pkcs11_object.h"
#include "pkcs11_key.h"
#include "pkcs11_cert.h"
#include "pkcs11_session.h"
#include "cryptoauthlib.h"
#include <stdio.h>
/**
* \defgroup pkcs11 Token Management (pkcs11_)
@{ */
#if PKCS11_508_SUPPORT
#if !PKCS11_USE_STATIC_CONFIG
/** Standard Configuration Structure for ATECC508A devices */
static const uint8_t atecc508_config[] = {
0x01, 0x23, 0x00, 0x00, 0x00, 0x00, 0x60, 0x01, 0x00, 0x00, 0x00, 0x00, 0xEE, 0x00, 0x01, 0x00,
0xC0, 0x00, 0x55, 0x00, 0x8F, 0x20, 0xC4, 0x44, 0x87, 0x20, 0x87, 0x20, 0x8F, 0x0F, 0xC4, 0x36,
0x9F, 0x0F, 0x82, 0x20, 0x0F, 0x0F, 0xC4, 0x44, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F,
0x0F, 0x0F, 0x0F, 0x0F, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x33, 0x00, 0x1C, 0x00, 0x13, 0x00, 0x13, 0x00, 0x7C, 0x00, 0x1C, 0x00, 0x3C, 0x00, 0x33, 0x00,
0x3C, 0x00, 0x3C, 0x00, 0x3C, 0x00, 0x30, 0x00, 0x3C, 0x00, 0x3C, 0x00, 0x3C, 0x00, 0x30, 0x00
};
#else
extern const uint8_t atecc508_config[];
#endif
#endif
#if PKCS11_608_SUPPORT
#if !PKCS11_USE_STATIC_CONFIG
/** Standard Configuration Structure for ATECC608A devices */
static const uint8_t atecc608_config[] = {
0x01, 0x23, 0x00, 0x00, 0x00, 0x00, 0x60, 0x01, 0x00, 0x00, 0x00, 0x00, 0xEE, 0x01, 0x01, 0x00,
0xC0, 0x00, 0x00, 0x01, 0x8F, 0x20, 0xC4, 0x44, 0x87, 0x20, 0x87, 0x20, 0x8F, 0x0F, 0xC4, 0x36,
0x9F, 0x0F, 0x82, 0x20, 0x0F, 0x0F, 0xC4, 0x44, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F,
0x0F, 0x0F, 0x0F, 0x0F, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x33, 0x00, 0x1C, 0x00, 0x13, 0x00, 0x13, 0x00, 0x7C, 0x00, 0x1C, 0x00, 0x3C, 0x00, 0x33, 0x00,
0x3C, 0x00, 0x3C, 0x00, 0x3C, 0x00, 0x30, 0x00, 0x3C, 0x00, 0x3C, 0x00, 0x3C, 0x00, 0x30, 0x00,
};
#else
extern const uint8_t atecc608_config[];
#endif
#endif
/** Get the device model number from the info word */
static char * pkcs11_token_device(uint8_t info[4])
{
char * rv = "unknown";
switch (info[2])
{
case 0x00:
if (0x02 == info[1])
{
rv = "ATSHA204A";
}
break;
case 0x50:
rv = "ATECC508A";
break;
case 0x60:
rv = "ATECC608A";
break;
default:
break;
}
return rv;
}
/** Write the configuration into the device and generate new keys */
CK_RV pkcs11_token_init(CK_SLOT_ID slotID, CK_UTF8CHAR_PTR pPin, CK_ULONG ulPinLen, CK_UTF8CHAR_PTR pLabel)
{
#if PKCS11_TOKEN_INIT_SUPPORT
CK_RV rv;
uint8_t buf[32];
uint8_t * pConfig;
bool lock = false;
ATCADeviceType devtype = ATCA_DEV_UNKNOWN;
pkcs11_lib_ctx_ptr pLibCtx;
pkcs11_slot_ctx_ptr pSlotCtx;
rv = pkcs11_init_check(&pLibCtx, FALSE);
if (rv)
{
return rv;
}
/* Get the slot context */
pSlotCtx = pkcs11_slot_get_context(pLibCtx, slotID);
if (!pSlotCtx)
{
return CKR_SLOT_ID_INVALID;
}
/* Lock the library */
rv = pkcs11_lock_context(pLibCtx);
if (CKR_OK == rv)
{
/* Check the config zone lock status */
rv = atcab_is_locked(LOCK_ZONE_CONFIG, &lock);
}
if (ATCA_SUCCESS == rv)
{
/* Get the device type */
rv = atcab_info(buf);
}
switch (buf[2])
{
#if PKCS11_508_SUPPORT
case 0x50:
devtype = ATECC508A;
pConfig = (uint8_t*)atecc508_config;
break;
#endif
#if PKCS11_608_SUPPORT
case 0x60:
devtype = ATECC608A;
pConfig = (uint8_t*)atecc608_config;
break;
#endif
default:
rv = CKR_TOKEN_NOT_RECOGNIZED;
break;
}
/* Program the configuration zone */
if (!lock)
{
#ifdef ATCA_I2C_ECC_ADDRESS
#if (ATCA_I2C_ECC_ADDRESS == 0) || (ATCA_I2C_ECC_ADDRESS & 0x01) || (ATCA_I2C_ECC_ADDRESS > 0xFE)
#error "Sanity Check Failure: ATCA_I2C_ECC_ADDRESS is invalid for the device"
#endif
buf[0] = ATCA_I2C_ECC_ADDRESS;
#endif
if (ATCA_SUCCESS == rv)
{
rv = atcab_write_config_zone(pConfig);
}
if (ATCA_SUCCESS == rv)
{
rv = atcab_lock_config_zone();
}
}
if (ATCA_SUCCESS == rv)
{
/* Check data zone lock */
rv = atcab_is_locked(LOCK_ZONE_DATA, &lock);
}
if (!lock)
{
size_t buflen = sizeof(buf);
/* Generate New Keys */
for (int i = 0; (i < 16) && (ATCA_SUCCESS == rv); i++)
{
if (ATCA_KEY_CONFIG_PRIVATE_MASK & ((atecc608a_config_t*)pConfig)->KeyConfig[i])
{
rv = atcab_genkey(i, NULL);
}
}
if (ulPinLen)
{
/* Covert the pin to a key */
if (CKR_OK == rv)
{
rv = atcab_hex2bin(pPin, ulPinLen, buf, &buflen);
}
/* Write the default pin */
if (CKR_OK == rv)
{
rv = atcab_write_zone(ATCA_ZONE_DATA, PKCS11_PIN_SLOT, 0, 0, buf, buflen);
}
}
/* Lock the data zone */
if (ATCA_SUCCESS == rv)
{
rv = atcab_lock_data_zone();
}
}
/* If the I2C address changed it'll have to be put back to sleep before it'll
change */
(void)atcab_release();
/* Release the lock on the library */
(void)pkcs11_unlock_context(pLibCtx);
/* Trigger a reinitialization of the slot */
if (ATCA_SUCCESS == rv)
{
ATCAIfaceCfg * ifacecfg = (ATCAIfaceCfg*)pSlotCtx->interface_config;
ifacecfg->atcai2c.slave_address = ATCA_I2C_ECC_ADDRESS;
pSlotCtx->initialized = FALSE;
rv = pkcs11_slot_init(0);
}
if (ATCA_SUCCESS != rv)
{
return CKR_FUNCTION_FAILED;
}
else
{
return CKR_OK;
}
#else
return CKR_FUNCTION_NOT_SUPPORTED;
#endif
}
CK_RV pkcs11_token_get_access_type(CK_VOID_PTR pObject, CK_ATTRIBUTE_PTR pAttribute)
{
pkcs11_object_ptr obj_ptr = (pkcs11_object_ptr)pObject;
if (obj_ptr)
{
atecc508a_config_t * pConfig = (atecc508a_config_t*)obj_ptr->config;
if (ATCA_KEY_CONFIG_PRIVATE_MASK & pConfig->KeyConfig[obj_ptr->slot])
{
return pkcs11_attrib_true(pObject, pAttribute);
}
else
{
return pkcs11_attrib_false(pObject, pAttribute);
}
}
return CKR_ARGUMENTS_BAD;
}
CK_RV pkcs11_token_get_writable(CK_VOID_PTR pObject, CK_ATTRIBUTE_PTR pAttribute)
{
pkcs11_object_ptr obj_ptr = (pkcs11_object_ptr)pObject;
if (obj_ptr)
{
atecc508a_config_t * pConfig = (atecc508a_config_t*)obj_ptr->config;
if ((ATCA_KEY_CONFIG_PRIVATE_MASK & pConfig->KeyConfig[obj_ptr->slot]) ||
(ATCA_SLOT_CONFIG_IS_SECRET_MASK & pConfig->SlotConfig[obj_ptr->slot]))
{
return pkcs11_attrib_false(pObject, pAttribute);
}
else
{
return pkcs11_attrib_true(pObject, pAttribute);
}
}
return CKR_ARGUMENTS_BAD;
}
/**
* \brief Obtains information about a particular token
*/
CK_RV pkcs11_token_get_info(CK_SLOT_ID slotID, CK_TOKEN_INFO_PTR pInfo)
{
pkcs11_lib_ctx_ptr lib_ctx = pkcs11_get_context();
pkcs11_slot_ctx_ptr slot_ctx;
ATCAIfaceCfg *if_cfg_ptr;
CK_UTF8CHAR buf[16];
bool lock = FALSE;
if (!lib_ctx || !lib_ctx->initialized)
{
return CKR_CRYPTOKI_NOT_INITIALIZED;
}
if (!pInfo)
{
return CKR_ARGUMENTS_BAD;
}
/* Initialize the target structure */
memset(pInfo, 0, sizeof(CK_TOKEN_INFO));
/* Retrieve the slot context - i.e. the attached device (ECC508A, SHA256, etc) */
slot_ctx = pkcs11_slot_get_context(lib_ctx, slotID);
if (!slot_ctx)
{
return CKR_SLOT_ID_INVALID;
}
/* Default Info Fields */
pInfo->hardwareVersion.major = (CK_BYTE)CK_UNAVAILABLE_INFORMATION;
pInfo->hardwareVersion.minor = (CK_BYTE)CK_UNAVAILABLE_INFORMATION;
pInfo->firmwareVersion.major = (CK_BYTE)CK_UNAVAILABLE_INFORMATION;
pInfo->firmwareVersion.minor = (CK_BYTE)CK_UNAVAILABLE_INFORMATION;
pInfo->ulTotalPublicMemory = CK_UNAVAILABLE_INFORMATION;
pInfo->ulFreePublicMemory = CK_UNAVAILABLE_INFORMATION;
pInfo->ulTotalPrivateMemory = CK_UNAVAILABLE_INFORMATION;
pInfo->ulFreePrivateMemory = CK_UNAVAILABLE_INFORMATION;
pInfo->ulMaxPinLen = 0;
pInfo->ulMinPinLen = 0;
pInfo->flags = CKF_RNG;
pInfo->ulMaxSessionCount = 1;
pInfo->ulMaxRwSessionCount = 1;
pInfo->ulSessionCount = (slot_ctx->session) ? TRUE : FALSE;
pInfo->ulRwSessionCount = (slot_ctx->session) ? TRUE : FALSE;
PKCS11_DEBUG("Token Info: %d\r\n", slot_ctx->initialized);
if (slot_ctx->initialized)
{
(void)pkcs11_lock_context(lib_ctx);
/* Read the serial number */
if (!atcab_read_serial_number(buf))
{
size_t len = sizeof(pInfo->serialNumber);
/* Bytes 2-7 are the unique serial number */
atcab_bin2hex_(&buf[2], 6, (char*)pInfo->serialNumber, &len, FALSE, FALSE, TRUE);
/* Bytes 0, 1 & 8 is the customer code */
snprintf((char*)pInfo->label, sizeof(pInfo->label), "%02X%02X%02X", buf[0], buf[1], buf[8]);
}
/* Read the hardware revision data */
if (!atcab_info(buf))
{
/* SHA204 = 00 02 00 09, ECC508 = 00 00 50 00, AES132 = 0A 07*/
pInfo->hardwareVersion.major = 0;
pInfo->hardwareVersion.minor = buf[3];
snprintf((char*)pInfo->model, sizeof(pInfo->model), "%s", pkcs11_token_device(buf));
}
/* Check if the device locks are set */
if (ATCA_SUCCESS == atcab_is_locked(LOCK_ZONE_DATA, &lock))
{
if (lock)
{
pInfo->flags |= CKF_TOKEN_INITIALIZED;
PKCS11_DEBUG("Token Locked\r\n");
}
}
/* Check if the device locks are set */
if (ATCA_SUCCESS == atcab_is_slot_locked(PKCS11_PIN_SLOT, &lock))
{
if (lock)
{
pInfo->flags |= CKF_USER_PIN_INITIALIZED;
PKCS11_DEBUG("Pin Slot Locked\r\n");
}
}
(void)pkcs11_unlock_context(lib_ctx);
}
/* Use the same manufacturer ID we use throughout */
snprintf((char*)pInfo->manufacturerID, sizeof(pInfo->manufacturerID), "%s", pkcs11_lib_manufacturer_id);
/* Make sure strings are escaped properly */
pkcs11_util_escape_string(pInfo->label, sizeof(pInfo->label));
pkcs11_util_escape_string(pInfo->manufacturerID, sizeof(pInfo->manufacturerID));
pkcs11_util_escape_string(pInfo->model, sizeof(pInfo->model));
pkcs11_util_escape_string(pInfo->serialNumber, sizeof(pInfo->serialNumber));
return CKR_OK;
}
/**
* \brief Generate the specified amount of random data
*/
CK_RV pkcs11_token_random(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pRandomData, CK_ULONG ulRandomLen)
{
pkcs11_session_ctx_ptr pSession;
pkcs11_lib_ctx_ptr lib_ctx;
ATCA_STATUS status;
uint8_t buf[32];
CK_RV rv;
rv = pkcs11_init_check(&lib_ctx, FALSE);
if (rv)
{
return rv;
}
if (!pRandomData || !ulRandomLen)
{
return CKR_ARGUMENTS_BAD;
}
rv = pkcs11_session_check(&pSession, hSession);
if (rv)
{
return rv;
}
do
{
(void)pkcs11_lock_context(lib_ctx);
status = atcab_random(buf);
(void)pkcs11_unlock_context(lib_ctx);
if (status)
{
return CKR_DEVICE_ERROR;
}
if (32 < ulRandomLen)
{
memcpy(pRandomData, buf, 32);
pRandomData += 32;
ulRandomLen -= 32;
}
else
{
memcpy(pRandomData, buf, ulRandomLen);
ulRandomLen = 0;
}
}
while (ulRandomLen);
return CKR_OK;
}
CK_RV pkcs11_token_set_pin(CK_SESSION_HANDLE hSession, CK_UTF8CHAR_PTR pOldPin,
CK_ULONG ulOldLen, CK_UTF8CHAR_PTR pNewPin, CK_ULONG ulNewLen)
{
pkcs11_session_ctx_ptr pSession;
pkcs11_lib_ctx_ptr lib_ctx;
ATCA_STATUS status;
uint8_t buf[32];
size_t buflen = sizeof(buf);
CK_RV rv;
rv = pkcs11_init_check(&lib_ctx, FALSE);
if (rv)
{
return rv;
}
if (!pNewPin || !ulNewLen)
{
return CKR_ARGUMENTS_BAD;
}
rv = pkcs11_session_check(&pSession, hSession);
if (rv)
{
return rv;
}
/* Covert the pin to a key */
if (CKR_OK == rv)
{
rv = atcab_hex2bin(pNewPin, ulNewLen, buf, &buflen);
}
if (CKR_OK == rv)
{
rv = atcab_write_zone(ATCA_ZONE_DATA, PKCS11_PIN_SLOT, 0, 0, buf, buflen);
}
/* Lock the pin once it has been written */
#if PKCS11_LOCK_PIN_SLOT
if (CKR_OK == rv)
{
rv = atcab_lock_data_slot(PKCS11_PIN_SLOT);
}
#endif
return rv;
}
/** @} */