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Implement psa_generate_key_custom

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Implement `psa_generate_key_custom()` and
`psa_key_derivation_output_key_custom()`. These functions replace
`psa_generate_key_ext()` and `psa_key_derivation_output_key_ext()`.
They have the same functionality, but a slightly different interface:
the `ext` functions use a structure with a flexible array member to pass
variable-length data, while the `custom` functions use a separate parameter.

Keep the `ext` functions for backward compatibility with Mbed TLS 3.6.0.
But make them a thin wrapper around the new `custom` functions.

Duplicate the test code and data. The test cases have to be duplicated
anyway, and the test functions are individually more readable this way.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2024-06-06 21:11:44 +02:00
parent 095cf69bc6
commit f36d785188
10 changed files with 485 additions and 53 deletions
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6
library/psa_crypto_rsa.c
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@ -241,7 +241,7 @@ static psa_status_t psa_rsa_read_exponent(const uint8_t *e_bytes,
psa_status_t mbedtls_psa_rsa_generate_key(
const psa_key_attributes_t *attributes,
const psa_key_production_parameters_t *params, size_t params_data_length,
const uint8_t *custom_data, size_t custom_data_length,
uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length)
{
psa_status_t status;
@ -249,8 +249,8 @@ psa_status_t mbedtls_psa_rsa_generate_key(
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
int exponent = 65537;
if (params_data_length != 0) {
status = psa_rsa_read_exponent(params->data, params_data_length,
if (custom_data_length != 0) {
status = psa_rsa_read_exponent(custom_data, custom_data_length,
&exponent);
if (status != PSA_SUCCESS) {
return status;