MCUX CLNS
MCUX Crypto Library Normal Secure
hash_sha384_one_block.c

Example of SHA2-384 hashing using the CSSv2 (CLNS component mcuxClCss)

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#include <mcuxClCss.h> // Interface to the entire mcuxClCss component
#include <mcuxCsslFlowProtection.h> // Code flow protection
#include <stdbool.h> // bool type for the example's return code
static uint8_t const sha384_padded_input[MCUXCLCSS_HASH_BLOCK_SIZE_SHA_384] = {0x61U, 0x62U, 0x63U, 0x80U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00u, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00u, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x18U};
static uint8_t sha384_reference_digest[MCUXCLCSS_HASH_OUTPUT_SIZE_SHA_384] = {0xcbU, 0x00U, 0x75U, 0x3fU,
0x45U, 0xa3U, 0x5eU, 0x8bU,
0xb5U, 0xa0U, 0x3dU, 0x69U,
0x9aU, 0xc6U, 0x50U, 0x07U,
0x27U, 0x2cU, 0x32U, 0xabU,
0x0eU, 0xdeU, 0xd1U, 0x63U,
0x1aU, 0x8bU, 0x60U, 0x5aU,
0x43U, 0xffU, 0x5bU, 0xedU,
0x80U, 0x86U, 0x07U, 0x2bU,
0xa1U, 0xe7U, 0xccU, 0x23U,
0x58U, 0xbaU, 0xecU, 0xa1U,
0x34U, 0xc8U, 0x25U, 0xa7U};
static uint8_t sha2_384_digest[MCUXCLCSS_HASH_STATE_SIZE_SHA_384]; // MCUXCLCSS_HASH_STATE_SIZE_SHA_384 has to be used as the mcuxClCss_Hash_Async do not perform the truncation of the hash state.
void)
{
MCUX_CSSL_FP_FUNCTION_CALL_BEGIN(result, token, mcuxClCss_Enable_Async()); // Enable the CSSv2.
// mcuxClCss_Enable_Async is a flow-protected function: Check the protection token and the return value
return false;
MCUX_CSSL_FP_FUNCTION_CALL_BEGIN(result, token, mcuxClCss_WaitForOperation(MCUXCLCSS_ERROR_FLAGS_CLEAR)); // Wait for the mcuxClCss_Enable_Async operation to complete.
// mcuxClCss_WaitForOperation is a flow-protected function: Check the protection token and the return value
return false;
mcuxClCss_HashOption_t hash_options = {0U}; // Initialize a new configuration for the planned mcuxClCss_Hash_Async operation.
hash_options.bits.hashini = MCUXCLCSS_HASH_INIT_ENABLE; // Configure that the mcuxClCss_Hash_Async operation shall initialized with the standard IV (Initialization Vector).
hash_options.bits.hashoe = MCUXCLCSS_HASH_OUTPUT_ENABLE; // Configure the mcuxClCss_Hash_Async operation so that the hash digest is moved into memory at the end of the operation.
hash_options.bits.hashmd = MCUXCLCSS_HASH_MODE_SHA_384; // Configure the mcuxClCss_Hash_Async operation so that the Sha2-384 algorithm is used.
MCUX_CSSL_FP_FUNCTION_CALL_BEGIN(result, token, mcuxClCss_Hash_Async( // Perform the hashing.
hash_options, // Set the prepared configuration.
sha384_padded_input, sizeof(sha384_padded_input), // Set the data to be hashed. Note that this data's length is a multiple of the block length, so no padding is required
sha2_384_digest // Output buffer, which the operation will write the hash digest to.
));
// mcuxClCss_Hash_Async is a flow-protected function: Check the protection token and the return value
return false; // Expect that no error occurred, meaning that the mcuxClCss_Hash_Async operation was started.
MCUX_CSSL_FP_FUNCTION_CALL_BEGIN(result, token, mcuxClCss_WaitForOperation(MCUXCLCSS_ERROR_FLAGS_CLEAR)); // Wait for the mcuxClCss_Hash_Async operation to complete.
// mcuxClCss_WaitForOperation is a flow-protected function: Check the protection token and the return value
return false;
for (size_t i = 0; i < sizeof(sha384_reference_digest); i++)
{
if (sha2_384_digest[i] != sha384_reference_digest[i]) return false; // Expect that the resulting hash digest matches our expected output
}
MCUX_CSSL_FP_FUNCTION_CALL_BEGIN(result, token, mcuxClCss_Disable()); // Disable the CSSv2.
// mcuxClCss_Disable is a flow-protected function: Check the protection token and the return value
return false;
return true;
}