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Expose ecdsa_signature_to_asn1

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Expose ecdsa_signature_to_asn1 in the API. It's useful when converting
between RFC 4492 format and other representations that might be used
in external crypto processors.
This commit is contained in:
Gilles Peskine
2017-11-02 17:14:18 +01:00
committed by Andrzej Kurek
parent 9a8bb67935
commit bce41d373a
3 changed files with 38 additions and 13 deletions
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8
tests/suites/test_suite_ecdsa.function
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@@ -142,7 +142,7 @@ void ecdsa_write_read_random( int id )
rnd_pseudo_info rnd_info;
unsigned char hash[32];
unsigned char sig[200];
size_t sig_len, i;
size_t sig_len, max_sig_len, i;
mbedtls_ecdsa_init( &ctx );
memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) );
@@ -162,8 +162,10 @@ void ecdsa_write_read_random( int id )
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++ )
/* check we didn't write past the maximum length */
max_sig_len = MBEDTLS_ECDSA_MAX_SIG_LEN( ctx.grp.pbits );
TEST_ASSERT( sig_len <= max_sig_len );
for( i = max_sig_len; i < sizeof( sig ); i++ )
TEST_ASSERT( sig[i] == 0x2a );
/* try verification with invalid length */