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Fix ecp_tls_read_point's signature

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This commit is contained in:
Manuel Pégourié-Gonnard 2013-02-10 13:38:29 +01:00
parent 7c145c6418
commit 98f51815d6
3 changed files with 28 additions and 11 deletions
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4
include/polarssl/ecp.h
View File

@ -324,7 +324,7 @@ int ecp_tls_write_group( const ecp_group *grp, size_t *olen,
*
* \param grp ECP group used
* \param pt Destination point
* \param buf Start of input buffer
* \param buf $(Start of input buffer)
* \param len Buffer length
*
* \return O if successful,
@ -332,7 +332,7 @@ int ecp_tls_write_group( const ecp_group *grp, size_t *olen,
* POLARSSL_ERR_ECP_BAD_INPUT_DATA if input is invalid
*/
int ecp_tls_read_point( const ecp_group *grp, ecp_point *pt,
const unsigned char *buf, size_t len );
const unsigned char **buf, size_t len );
/**
* \brief Export a point as a TLS ECPoint record

13
library/ecp.c
View File

@ -271,9 +271,10 @@ cleanup:
* } ECPoint;
*/
int ecp_tls_read_point( const ecp_group *grp, ecp_point *pt,
const unsigned char *buf, size_t buf_len )
const unsigned char **buf, size_t buf_len )
{
unsigned char data_len;
const unsigned char *buf_start;
/*
* We must have at least two bytes (1 for length, at least of for data)
@ -281,11 +282,17 @@ int ecp_tls_read_point( const ecp_group *grp, ecp_point *pt,
if( buf_len < 2 )
return( POLARSSL_ERR_ECP_BAD_INPUT_DATA );
data_len = *buf++;
data_len = *(*buf)++;
if( data_len < 1 || data_len > buf_len - 1 )
return( POLARSSL_ERR_ECP_BAD_INPUT_DATA );
return ecp_point_read_binary( grp, pt, buf, data_len );
/*
* Save buffer start for read_binary and update buf
*/
buf_start = *buf;
*buf += data_len;
return ecp_point_read_binary( grp, pt, buf_start, data_len );
}
/*

22
tests/suites/test_suite_ecp.function
View File

@ -301,6 +301,7 @@ ecp_tls_read_point:id:input:x:y:z:ret
mpi X, Y, Z;
size_t ilen;
unsigned char buf[256];
const unsigned char *vbuf = buf;
memset( buf, 0, sizeof( buf ) );
@ -315,13 +316,14 @@ ecp_tls_read_point:id:input:x:y:z:ret
ilen = unhexify( buf, {input} );
TEST_ASSERT( ecp_tls_read_point( &grp, &P, buf, ilen ) == {ret} );
TEST_ASSERT( ecp_tls_read_point( &grp, &P, &vbuf, ilen ) == {ret} );
if( {ret} == 0 )
{
TEST_ASSERT( mpi_cmp_mpi( &P.X, &X ) == 0 );
TEST_ASSERT( mpi_cmp_mpi( &P.Y, &Y ) == 0 );
TEST_ASSERT( mpi_cmp_mpi( &P.Z, &Z ) == 0 );
TEST_ASSERT( *vbuf == 0x00 );
}
ecp_group_free( &grp ); ecp_point_free( &P );
@ -335,37 +337,45 @@ ecp_tls_write_read_point:id
ecp_group grp;
ecp_point pt;
unsigned char buf[256];
const unsigned char *vbuf;
size_t olen;
ecp_group_init( &grp );
ecp_point_init( &pt );
memset( buf, 0x00, sizeof( buf ) );
TEST_ASSERT( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_{id} ) == 0 );
memset( buf, 0x00, sizeof( buf ) ); vbuf = buf;
TEST_ASSERT( ecp_tls_write_point( &grp, &grp.G,
POLARSSL_ECP_PF_COMPRESSED, &olen, buf, 256 ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, olen )
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, &vbuf, olen )
== POLARSSL_ERR_ECP_BAD_INPUT_DATA );
TEST_ASSERT( vbuf == buf + olen );
memset( buf, 0x00, sizeof( buf ) ); vbuf = buf;
TEST_ASSERT( ecp_tls_write_point( &grp, &grp.G,
POLARSSL_ECP_PF_UNCOMPRESSED, &olen, buf, 256 ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, olen ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, &vbuf, olen ) == 0 );
TEST_ASSERT( mpi_cmp_mpi( &grp.G.X, &pt.X ) == 0 );
TEST_ASSERT( mpi_cmp_mpi( &grp.G.Y, &pt.Y ) == 0 );
TEST_ASSERT( mpi_cmp_mpi( &grp.G.Z, &pt.Z ) == 0 );
TEST_ASSERT( vbuf == buf + olen );
memset( buf, 0x00, sizeof( buf ) ); vbuf = buf;
TEST_ASSERT( ecp_set_zero( &pt ) == 0 );
TEST_ASSERT( ecp_tls_write_point( &grp, &pt,
POLARSSL_ECP_PF_COMPRESSED, &olen, buf, 256 ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, olen ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, &vbuf, olen ) == 0 );
TEST_ASSERT( ecp_is_zero( &pt ) );
TEST_ASSERT( vbuf == buf + olen );
memset( buf, 0x00, sizeof( buf ) ); vbuf = buf;
TEST_ASSERT( ecp_set_zero( &pt ) == 0 );
TEST_ASSERT( ecp_tls_write_point( &grp, &pt,
POLARSSL_ECP_PF_UNCOMPRESSED, &olen, buf, 256 ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, olen ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, &vbuf, olen ) == 0 );
TEST_ASSERT( ecp_is_zero( &pt ) );
TEST_ASSERT( vbuf == buf + olen );
ecp_group_free( &grp );
ecp_point_free( &pt );