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Fix Changelog, add separate test functions for hash of all-zero bits

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Signed-off-by: TRodziewicz <tomasz.rodziewicz@mobica.com>
This commit is contained in:
TRodziewicz 2021-04-07 19:16:18 +02:00
parent 20ad475cc2
commit 40de3c99c0
3 changed files with 184 additions and 79 deletions
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3
ChangeLog.d/issue1792.txt
View file

@ -1,4 +1,3 @@
Bugfix
* Fix a bug in ECDSA that would cause it to fail when the hash is all-bits
zero.
Fixes #1792
zero. Fixes #1792

40
tests/suites/test_suite_ecdsa.data
View file

@ -1,6 +1,26 @@
ECDSA Parameter validation
ecdsa_invalid_param:
ECDSA primitive random #1
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
ecdsa_prim_zero:MBEDTLS_ECP_DP_SECP192R1
ECDSA primitive random #2
depends_on:MBEDTLS_ECP_DP_SECP224R1_ENABLED
ecdsa_prim_zero:MBEDTLS_ECP_DP_SECP224R1
ECDSA primitive random #3
depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
ecdsa_prim_zero:MBEDTLS_ECP_DP_SECP256R1
ECDSA primitive random #4
depends_on:MBEDTLS_ECP_DP_SECP384R1_ENABLED
ecdsa_prim_zero:MBEDTLS_ECP_DP_SECP384R1
ECDSA primitive random #5
depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
ecdsa_prim_zero:MBEDTLS_ECP_DP_SECP521R1
ECDSA primitive random #1
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
ecdsa_prim_random:MBEDTLS_ECP_DP_SECP192R1
@ -33,6 +53,26 @@ ECDSA primitive rfc 4754 p521
depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
ecdsa_prim_test_vectors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
ECDSA write-read random #1
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
ecdsa_write_read_zero:MBEDTLS_ECP_DP_SECP192R1
ECDSA write-read random #2
depends_on:MBEDTLS_ECP_DP_SECP224R1_ENABLED
ecdsa_write_read_zero:MBEDTLS_ECP_DP_SECP224R1
ECDSA write-read random #3
depends_on:MBEDTLS_ECP_DP_SECP256R1_ENABLED
ecdsa_write_read_zero:MBEDTLS_ECP_DP_SECP256R1
ECDSA write-read random #4
depends_on:MBEDTLS_ECP_DP_SECP384R1_ENABLED
ecdsa_write_read_zero:MBEDTLS_ECP_DP_SECP384R1
ECDSA write-read random #5
depends_on:MBEDTLS_ECP_DP_SECP521R1_ENABLED
ecdsa_write_read_zero:MBEDTLS_ECP_DP_SECP521R1
ECDSA write-read random #1
depends_on:MBEDTLS_ECP_DP_SECP192R1_ENABLED
ecdsa_write_read_random:MBEDTLS_ECP_DP_SECP192R1

220
tests/suites/test_suite_ecdsa.function
View file

@ -205,14 +205,13 @@ exit:
/* END_CASE */
/* BEGIN_CASE */
void ecdsa_prim_random( int id )
void ecdsa_prim_zero( int id )
{
mbedtls_ecp_group grp;
mbedtls_ecp_point Q;
mbedtls_mpi d, r, s;
mbedtls_test_rnd_pseudo_info rnd_info;
unsigned char buf[MBEDTLS_MD_MAX_SIZE];
int test_runs = 2;
mbedtls_ecp_group_init( &grp );
mbedtls_ecp_point_init( &Q );
@ -220,31 +219,50 @@ void ecdsa_prim_random( int id )
memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) );
memset( buf, 0, sizeof( buf ) );
while ( test_runs-- )
{
/* prepare material for signature */
if ( test_runs == 1 )
{
TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info,
buf, sizeof( buf ) )
== 0 );
} else {
TEST_ASSERT( mbedtls_test_rnd_zero_rand( NULL,
buf, sizeof( buf ) )
== 0 );
}
TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q,
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q,
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ),
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ),
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s )
== 0 );
}
exit:
mbedtls_ecp_group_free( &grp );
mbedtls_ecp_point_free( &Q );
mbedtls_mpi_free( &d ); mbedtls_mpi_free( &r ); mbedtls_mpi_free( &s );
}
/* END_CASE */
/* BEGIN_CASE */
void ecdsa_prim_random( int id )
{
mbedtls_ecp_group grp;
mbedtls_ecp_point Q;
mbedtls_mpi d, r, s;
mbedtls_test_rnd_pseudo_info rnd_info;
unsigned char buf[MBEDTLS_MD_MAX_SIZE];
mbedtls_ecp_group_init( &grp );
mbedtls_ecp_point_init( &Q );
mbedtls_mpi_init( &d ); mbedtls_mpi_init( &r ); mbedtls_mpi_init( &s );
memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) );
memset( buf, 0, sizeof( buf ) );
/* prepare material for signature */
TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info,
buf, sizeof( buf ) ) == 0 );
TEST_ASSERT( mbedtls_ecp_group_load( &grp, id ) == 0 );
TEST_ASSERT( mbedtls_ecp_gen_keypair( &grp, &d, &Q,
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_sign( &grp, &r, &s, &d, buf, sizeof( buf ),
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_verify( &grp, buf, sizeof( buf ), &Q, &r, &s ) == 0 );
exit:
mbedtls_ecp_group_free( &grp );
@ -360,6 +378,68 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_SHA256_C */
void ecdsa_write_read_zero( int id )
{
mbedtls_ecdsa_context ctx;
mbedtls_test_rnd_pseudo_info rnd_info;
unsigned char hash[32];
unsigned char sig[200];
size_t sig_len, i;
mbedtls_ecdsa_init( &ctx );
memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) );
memset( hash, 0, sizeof( hash ) );
memset( sig, 0x2a, sizeof( sig ) );
TEST_ASSERT(0);
/* generate signing key */
TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id,
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
/* 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,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == 0 );
/* check we didn't write past the announced length */
for( i = sig_len; i < sizeof( sig ); i++ )
TEST_ASSERT( sig[i] == 0x2a );
/* try verification with invalid length */
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len - 1 ) != 0 );
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len + 1 ) != 0 );
/* try invalid sequence tag */
sig[0]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) != 0 );
sig[0]--;
/* try modifying r */
sig[10]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
sig[10]--;
/* try modifying s */
sig[sig_len - 1]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
sig[sig_len - 1]--;
exit:
mbedtls_ecdsa_free( &ctx );
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_SHA256_C */
void ecdsa_write_read_random( int id )
{
@ -368,70 +448,56 @@ void ecdsa_write_read_random( int id )
unsigned char hash[32];
unsigned char sig[200];
size_t sig_len, i;
int test_runs = 2;
mbedtls_ecdsa_init( &ctx );
memset( &rnd_info, 0x00, sizeof( mbedtls_test_rnd_pseudo_info ) );
memset( hash, 0, sizeof( hash ) );
memset( sig, 0x2a, sizeof( sig ) );
while ( test_runs-- )
{
memset( sig, 0x2a, sizeof( sig ) );
/* prepare material for signature */
TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info,
hash, sizeof( hash ) ) == 0 );
/* prepare material for signature */
if ( test_runs == 1 )
{
TEST_ASSERT( mbedtls_test_rnd_pseudo_rand( &rnd_info,
hash, sizeof( hash ) )
== 0 );
} else {
TEST_ASSERT( mbedtls_test_rnd_zero_rand( NULL,
hash, sizeof( hash ) )
== 0 );
}
/* generate signing key */
TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id,
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
/* generate signing key */
TEST_ASSERT( mbedtls_ecdsa_genkey( &ctx, id,
&mbedtls_test_rnd_pseudo_rand,
&rnd_info ) == 0 );
/* 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,
&rnd_info ) == 0 );
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == 0 );
/* 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,
&rnd_info ) == 0 );
/* check we didn't write past the announced length */
for( i = sig_len; i < sizeof( sig ); i++ )
TEST_ASSERT( sig[i] == 0x2a );
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == 0 );
/* try verification with invalid length */
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len - 1 ) != 0 );
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len + 1 ) != 0 );
/* check we didn't write past the announced length */
for( i = sig_len; i < sizeof( sig ); i++ )
TEST_ASSERT( sig[i] == 0x2a );
/* try invalid sequence tag */
sig[0]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) != 0 );
sig[0]--;
/* try verification with invalid length */
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len - 1 ) != 0 );
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len + 1 ) != 0 );
/* try modifying r */
sig[10]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
sig[10]--;
/* try invalid sequence tag */
sig[0]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) != 0 );
sig[0]--;
/* try modifying r */
sig[10]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
sig[10]--;
/* try modifying s */
sig[sig_len - 1]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
sig[sig_len - 1]--;
}
/* try modifying s */
sig[sig_len - 1]++;
TEST_ASSERT( mbedtls_ecdsa_read_signature( &ctx, hash, sizeof( hash ),
sig, sig_len ) == MBEDTLS_ERR_ECP_VERIFY_FAILED );
sig[sig_len - 1]--;
exit:
mbedtls_ecdsa_free( &ctx );