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psa: test buffer sized just for actual plaintext

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Signed-off-by: Manuel Pégourié-Gonnard <[email protected]>
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Manuel Pégourié-Gonnard
2026-06-10 09:57:20 +02:00
parent 4813b0c093
commit d73eec656c
1 changed files with 15 additions and 2 deletions
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tests/suites/test_suite_psa_crypto.function
+15 -2
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@@ -8744,6 +8744,12 @@ void asymmetric_encrypt_decrypt(int key_type_arg,
TEST_LE_U(output_size, PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE);
TEST_CALLOC(output, output_size);
/* We want the function to work with an output buffer that's just the size
* of the actual plaintext. The PSA spec actually requires callers to pass
* a buffer that's the maximum possible plaintext size, given by
* PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(). But historically we've accepted
* smaller sizes if the actual plaintext fits. People might depend on this
* (our TLS code does), so let's preserve this behaviour in LTS branches. */
output2_size = input_data->len;
TEST_LE_U(output2_size,
PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg));
@@ -8813,8 +8819,15 @@ void asymmetric_decrypt(int key_type_arg,
PSA_ASSERT(psa_get_key_attributes(key, &attributes));
key_bits = psa_get_key_bits(&attributes);
/* Determine the maximum ciphertext length */
output_size = PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg);
/* We want the function to work with an output buffer that's just the size
* of the actual plaintext. The PSA spec actually requires callers to pass
* a buffer that's the maximum possible plaintext size, given by
* PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(). But historically we've accepted
* smaller sizes if the actual plaintext fits. People might depend on this
* (our TLS code does), so let's preserve this behaviour in LTS branches. */
output_size = expected_data->len;
TEST_LE_U(output_size,
PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(key_type, key_bits, alg));
TEST_LE_U(output_size, PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE);
TEST_CALLOC(output, output_size);