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psa_constant_names: support truncated MAC and AEAD

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This commit is contained in:
Gilles Peskine 2018-08-20 15:07:20 +02:00
parent 0deaf3d8d7
commit 498c2a1ff5
1 changed files with 26 additions and 3 deletions
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29
scripts/generate_psa_constants.py
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@ -51,7 +51,24 @@ static int psa_snprint_algorithm(char *buffer, size_t buffer_size,
psa_algorithm_t alg)
{
size_t required_size = 0;
switch (alg) {
psa_algorithm_t core_alg = alg;
unsigned long length_modifier = 0;
if (PSA_ALG_IS_MAC(alg)) {
core_alg = PSA_ALG_TRUNCATED_MAC(alg, 0);
if (core_alg != alg) {
append(&buffer, buffer_size, &required_size,
"PSA_ALG_TRUNCATED_MAC(", 22);
length_modifier = PSA_MAC_TRUNCATED_LENGTH(alg);
}
} else if (PSA_ALG_IS_AEAD(alg)) {
core_alg = PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH(alg);
if (core_alg != alg) {
append(&buffer, buffer_size, &required_size,
"PSA_ALG_AEAD_WITH_TAG_LENGTH(", 29);
length_modifier = PSA_AEAD_TAG_LENGTH(alg);
}
}
switch (core_alg) {
%(algorithm_cases)s
default:
%(algorithm_code)s{
@ -60,6 +77,12 @@ static int psa_snprint_algorithm(char *buffer, size_t buffer_size,
}
break;
}
if (core_alg != alg) {
append(&buffer, buffer_size, &required_size, ", ", 2);
append_integer(&buffer, buffer_size, &required_size,
"%%lu", length_modifier);
append(&buffer, buffer_size, &required_size, ")", 1);
}
buffer[0] = 0;
return required_size;
}
@ -99,10 +122,10 @@ key_type_from_curve_template = '''if (%(tester)s(type)) {
PSA_KEY_TYPE_GET_CURVE(type));
} else '''
algorithm_from_hash_template = '''if (%(tester)s(alg)) {
algorithm_from_hash_template = '''if (%(tester)s(core_alg)) {
append_with_hash(&buffer, buffer_size, &required_size,
"%(builder)s", %(builder_length)s,
PSA_ALG_GET_HASH(alg));
PSA_ALG_GET_HASH(core_alg));
} else '''
bit_test_template = '''\