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Add output size parameter to signature functions

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The functions mbedtls_pk_sign(), mbedtls_pk_sign_restartable(),
mbedtls_ecdsa_write_signature() and mbedtls_ecdsa_write_signature_restartable()
now take an extra parameter indicating the size of the output buffer for the
signature.

No change to RSA because for RSA, the output size is trivial to calculate.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2021-06-22 00:09:00 +02:00
parent 1fed4b8324
commit f00f152444
19 changed files with 131 additions and 81 deletions
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12
tests/suites/test_suite_ecdsa.function
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@@ -205,7 +205,7 @@ void ecdsa_write_read_zero( int id )
/* generate and write signature, then read and verify it */
TEST_ASSERT( mbedtls_ecdsa_write_signature( &ctx, MBEDTLS_MD_SHA256,
hash, sizeof( hash ),
sig, &sig_len, &mbedtls_test_rnd_pseudo_rand,
sig, sizeof( sig ), &sig_len, &mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == 0 );
@@ -269,7 +269,7 @@ void ecdsa_write_read_random( int id )
/* generate and write signature, then read and verify it */
TEST_ASSERT( mbedtls_ecdsa_write_signature( &ctx, MBEDTLS_MD_SHA256,
hash, sizeof( hash ),
sig, &sig_len, &mbedtls_test_rnd_pseudo_rand,
sig, sizeof( sig ), &sig_len, &mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == 0 );
@@ -404,8 +404,8 @@ void ecdsa_write_restart( int id, char *d_str, int md_alg,
cnt_restart = 0;
do {
ret = mbedtls_ecdsa_write_signature_restartable( &ctx,
md_alg, hash, hlen, sig, &slen, mbedtls_test_rnd_std_rand, NULL,
&rs_ctx );
md_alg, hash, hlen, sig, sizeof( sig ), &slen,
mbedtls_test_rnd_std_rand, NULL, &rs_ctx );
} while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
TEST_ASSERT( ret == 0 );
@@ -420,8 +420,8 @@ void ecdsa_write_restart( int id, char *d_str, int md_alg,
if( min_restart > 0 )
{
ret = mbedtls_ecdsa_write_signature_restartable( &ctx,
md_alg, hash, hlen, sig, &slen, mbedtls_test_rnd_std_rand, NULL,
&rs_ctx );
md_alg, hash, hlen, sig, sizeof( sig ), &slen,
mbedtls_test_rnd_std_rand, NULL, &rs_ctx );
TEST_ASSERT( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
}