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Merge pull request #9651 from waleed-elmelegy-arm/add-iop-key-gen-complete

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Add PSA interruptible key generation complete API
This commit is contained in:
Janos Follath 2024-11-26 18:34:40 +00:00 committed by GitHub
commit 49e6115443
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GPG Key ID: B5690EEEBB952194
5 changed files with 160 additions and 40 deletions
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40
tf-psa-crypto/core/psa_crypto.c
View File

@ -8314,7 +8314,9 @@ static psa_status_t psa_generate_key_iop_abort_internal(
return PSA_SUCCESS;
}
status = mbedtls_psa_generate_key_iop_abort(&operation->ctx);
status = mbedtls_psa_ecp_generate_key_iop_abort(&operation->ctx);
psa_reset_key_attributes(&operation->attributes);
operation->id = 0;
@ -8366,7 +8368,7 @@ psa_status_t psa_generate_key_iop_setup(
/* We only support the builtin/Mbed TLS driver for now. */
operation->id = PSA_CRYPTO_MBED_TLS_DRIVER_ID;
status = mbedtls_psa_generate_key_iop_setup(&operation->ctx, attributes);
status = mbedtls_psa_ecp_generate_key_iop_setup(&operation->ctx, attributes);
exit:
if (status != PSA_SUCCESS) {
@ -8386,10 +8388,42 @@ psa_status_t psa_generate_key_iop_complete(
psa_generate_key_iop_t *operation,
mbedtls_svc_key_id_t *key)
{
#if defined(MBEDTLS_ECP_RESTARTABLE)
psa_status_t status;
uint8_t key_data[PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS)+1] = { 0 };
size_t key_len = 0;
if (operation->id == 0 || operation->error_occurred) {
return PSA_ERROR_BAD_STATE;
}
status = mbedtls_psa_ecp_generate_key_iop_complete(&operation->ctx, key_data,
sizeof(key_data), &key_len);
if (status != PSA_SUCCESS) {
goto exit;
}
status = psa_import_key(&operation->attributes,
key_data + (sizeof(key_data) - key_len),
key_len,
key);
exit:
if (status != PSA_OPERATION_INCOMPLETE) {
if (status != PSA_SUCCESS) {
operation->error_occurred = 1;
}
psa_generate_key_iop_abort_internal(operation);
}
mbedtls_platform_zeroize(key_data, sizeof(key_data));
return status;
#else
(void) operation;
(void) key;
return PSA_ERROR_NOT_SUPPORTED;
return PSA_ERROR_BAD_STATE;
#endif
}
psa_status_t psa_generate_key_iop_abort(

34
tf-psa-crypto/core/psa_crypto_core.h
View File

@ -435,40 +435,6 @@ psa_status_t psa_generate_key_internal(const psa_key_attributes_t *attributes,
size_t key_buffer_size,
size_t *key_buffer_length);
/**
* \brief Setup a new interruptible key generation operation.
*
* \param[in] operation The \c mbedtls_psa_generate_key_iop_t to use.
* This must be initialized first.
* \param[in] attributes The desired attributes of the generated key.
*
* \retval #PSA_SUCCESS
* The operation started successfully - call \c mbedtls_psa_generate_key_complete()
* with the same operation to complete the operation.
* * \retval #PSA_ERROR_NOT_SUPPORTED
* Either no internal interruptible operations are
* currently supported, or the key attributes are not unsupported.
* * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* There was insufficient memory to load the key representation.
*
*/
psa_status_t mbedtls_psa_generate_key_iop_setup(
mbedtls_psa_generate_key_iop_t *operation,
const psa_key_attributes_t *attributes);
/**
* \brief Abort a key generation operation.
*
* \param[in] operation The \c mbedtls_psa_generate_key_iop_t to abort.
*
* \retval #PSA_SUCCESS
* The operation was aborted successfully.
*
*/
psa_status_t mbedtls_psa_generate_key_iop_abort(
mbedtls_psa_generate_key_iop_t *operation);
/** Sign a message with a private key. For hash-and-sign algorithms,
* this includes the hashing step.
*

35
tf-psa-crypto/drivers/builtin/src/psa_crypto_ecp.c
View File

@ -596,11 +596,11 @@ exit:
#if defined(MBEDTLS_ECP_RESTARTABLE)
psa_status_t mbedtls_psa_generate_key_iop_setup(
psa_status_t mbedtls_psa_ecp_generate_key_iop_setup(
mbedtls_psa_generate_key_iop_t *operation,
const psa_key_attributes_t *attributes)
{
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
int status = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
mbedtls_ecp_keypair_init(&operation->ecp);
@ -617,7 +617,36 @@ psa_status_t mbedtls_psa_generate_key_iop_setup(
return mbedtls_to_psa_error(status);
}
psa_status_t mbedtls_psa_generate_key_iop_abort(
psa_status_t mbedtls_psa_ecp_generate_key_iop_complete(
mbedtls_psa_generate_key_iop_t *operation,
uint8_t *key_output,
size_t key_output_size,
size_t *key_len)
{
*key_len = 0;
int status = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
*key_len = PSA_BITS_TO_BYTES(operation->ecp.grp.nbits);
if (*key_len > key_output_size) {
return PSA_ERROR_BUFFER_TOO_SMALL;
}
status = mbedtls_ecp_gen_privkey(&operation->ecp.grp, &operation->ecp.d,
mbedtls_psa_get_random, MBEDTLS_PSA_RANDOM_STATE);
if (status != 0) {
return mbedtls_to_psa_error(status);
}
operation->num_ops = 1;
status = mbedtls_mpi_write_binary(&operation->ecp.d, key_output, key_output_size);
return mbedtls_to_psa_error(status);
}
psa_status_t mbedtls_psa_ecp_generate_key_iop_abort(
mbedtls_psa_generate_key_iop_t *operation)
{
mbedtls_ecp_keypair_free(&operation->ecp);

61
tf-psa-crypto/drivers/builtin/src/psa_crypto_ecp.h
View File

@ -143,6 +143,67 @@ psa_status_t mbedtls_psa_ecp_generate_key(
const psa_key_attributes_t *attributes,
uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length);
/**
* \brief Setup a new interruptible key generation operation.
*
* \param[in] operation The \c mbedtls_psa_generate_key_iop_t to use.
* This must be initialized first.
* \param[in] attributes The desired attributes of the generated key.
*
* \retval #PSA_SUCCESS
* The operation started successfully - call \c mbedtls_psa_ecp_generate_key_iop_complete()
* with the same operation to complete the operation.
* * \retval #PSA_ERROR_NOT_SUPPORTED
* Either no internal interruptible operations are
* currently supported, or the key attributes are not unsupported.
* * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* There was insufficient memory to load the key representation.
*
*/
psa_status_t mbedtls_psa_ecp_generate_key_iop_setup(
mbedtls_psa_generate_key_iop_t *operation,
const psa_key_attributes_t *attributes);
/**
* \brief Continue and eventually complete a key generation operation.
*
* \note The signature of this function is that of a PSA driver
* generate_key_complete entry point. This function behaves as a
* generate_key_complete entry point as defined in the PSA driver
* interface specification for transparent drivers.
*
* \param[in] operation The \c mbedtls_psa_generate_key_iop_t to use.
* This must be initialized first and
* had \c mbedtls_psa_ecp_generate_key_iop_setup()
* called successfully.
* \param[out] key_output The buffer to which the generated key
* is to be written.
* \param[out] key_len On success, the number of bytes that make
* up the returned key output.
* \retval #PSA_SUCCESS
* The key was generated successfully.
* \retval #PSA_ERROR_INVALID_ARGUMENT \emptydescription
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
*
*/
psa_status_t mbedtls_psa_ecp_generate_key_iop_complete(
mbedtls_psa_generate_key_iop_t *operation,
uint8_t *key_output,
size_t key_output_size,
size_t *key_len);
/**
* \brief Abort a key generation operation.
*
* \param[in] operation The \c mbedtls_psa_generate_key_iop_t to abort.
*
* \retval #PSA_SUCCESS
* The operation was aborted successfully.
*
*/
psa_status_t mbedtls_psa_ecp_generate_key_iop_abort(
mbedtls_psa_generate_key_iop_t *operation);
/** Sign an already-calculated hash with ECDSA.
*
* \note The signature of this function is that of a PSA driver

30
tf-psa-crypto/tests/suites/test_suite_psa_crypto.function
View File

@ -10230,6 +10230,7 @@ void generate_key(int type_arg,
int is_large_key)
{
mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
mbedtls_svc_key_id_t iop_key = MBEDTLS_SVC_KEY_ID_INIT;
psa_key_type_t type = type_arg;
psa_key_usage_t usage = usage_arg;
size_t bits = bits_arg;
@ -10237,6 +10238,7 @@ void generate_key(int type_arg,
psa_status_t expected_status = expected_status_arg;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_attributes_t got_attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_key_attributes_t iop_attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_generate_key_iop_t operation = PSA_GENERATE_KEY_IOP_INIT;
PSA_ASSERT(psa_crypto_init());
@ -10276,6 +10278,12 @@ void generate_key(int type_arg,
expected_status = PSA_ERROR_NOT_SUPPORTED;
#endif
/* Test calling complete() without calling setup() will fail. */
status = psa_generate_key_iop_complete(&operation, &iop_key);
TEST_EQUAL(status, PSA_ERROR_BAD_STATE);
psa_generate_key_iop_abort(&operation);
status = psa_generate_key_iop_setup(&operation, &attributes);
TEST_EQUAL(status, expected_status);
@ -10291,6 +10299,26 @@ void generate_key(int type_arg,
status = psa_generate_key_iop_setup(&operation, &attributes);
TEST_EQUAL(status, expected_status);
if (expected_status != PSA_SUCCESS) {
goto exit;
}
do {
status = psa_generate_key_iop_complete(&operation, &iop_key);
} while (status == PSA_OPERATION_INCOMPLETE);
TEST_EQUAL(status, PSA_SUCCESS);
PSA_ASSERT(psa_get_key_attributes(iop_key, &iop_attributes));
TEST_EQUAL(psa_get_key_type(&iop_attributes), type);
TEST_EQUAL(psa_get_key_bits(&iop_attributes), bits);
TEST_EQUAL(mbedtls_test_psa_exercise_key(iop_key, usage, alg, 0), 1);
/* Test calling complete() 2 times consecutively will fail. */
status = psa_generate_key_iop_complete(&operation, &iop_key);
TEST_EQUAL(status, PSA_ERROR_BAD_STATE);
exit:
psa_generate_key_iop_abort(&operation);
/*
@ -10298,8 +10326,10 @@ exit:
* thus reset them as required.
*/
psa_reset_key_attributes(&got_attributes);
psa_reset_key_attributes(&iop_attributes);
psa_destroy_key(key);
psa_destroy_key(iop_key);
PSA_DONE();
}
/* END_CASE */