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Fix ecp_tls_write_point's signature

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This commit is contained in:
Manuel Pégourié-Gonnard 2013-02-10 12:22:46 +01:00
parent b325887fad
commit 420f1eb675
3 changed files with 31 additions and 16 deletions
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5
include/polarssl/ecp.h
View file

@ -255,7 +255,7 @@ int ecp_group_read_string( ecp_group *grp, int radix,
* or POLARSSL_ERR_ECP_BUFFER_TOO_SMALL * or POLARSSL_ERR_ECP_BUFFER_TOO_SMALL
*/ */
int ecp_point_write_binary( const ecp_group *grp, const ecp_point *P, int ecp_point_write_binary( const ecp_group *grp, const ecp_point *P,
int format, uint8_t *olen, int format, size_t *olen,
unsigned char *buf, size_t buflen ); unsigned char *buf, size_t buflen );
/** /**
@ -348,7 +348,8 @@ int ecp_tls_read_point( const ecp_group *grp, ecp_point *pt,
* or POLARSSL_ERR_ECP_BUFFER_TOO_SMALL * or POLARSSL_ERR_ECP_BUFFER_TOO_SMALL
*/ */
int ecp_tls_write_point( const ecp_group *grp, const ecp_point *pt, int ecp_tls_write_point( const ecp_group *grp, const ecp_point *pt,
int format, unsigned char *buf, size_t buf_len ); int format, size_t *olen,
unsigned char *buf, size_t blen );
/** /**
* \brief Addition: R = P + Q * \brief Addition: R = P + Q

23
library/ecp.c
View file

@ -186,7 +186,7 @@ cleanup:
* Export a point into unsigned binary data (SEC1 2.3.3) * Export a point into unsigned binary data (SEC1 2.3.3)
*/ */
int ecp_point_write_binary( const ecp_group *grp, const ecp_point *P, int ecp_point_write_binary( const ecp_group *grp, const ecp_point *P,
int format, uint8_t *olen, int format, size_t *olen,
unsigned char *buf, size_t buflen ) unsigned char *buf, size_t buflen )
{ {
int ret; int ret;
@ -293,15 +293,28 @@ int ecp_tls_read_point( const ecp_group *grp, ecp_point *pt,
* } ECPoint; * } ECPoint;
*/ */
int ecp_tls_write_point( const ecp_group *grp, const ecp_point *pt, int ecp_tls_write_point( const ecp_group *grp, const ecp_point *pt,
int format, unsigned char *buf, size_t buf_len ) int format, size_t *olen,
unsigned char *buf, size_t blen )
{ {
int ret;
/* /*
* buf_len must be at least one, for our length byte * buffer length must be at least one, for our length byte
*/ */
if( buf_len < 1 ) if( blen < 1 )
return( POLARSSL_ERR_ECP_BAD_INPUT_DATA ); return( POLARSSL_ERR_ECP_BAD_INPUT_DATA );
return ecp_point_write_binary( grp, pt, format, buf, buf + 1, buf_len - 1); if( ( ret = ecp_point_write_binary( grp, pt, format,
olen, buf + 1, blen - 1) ) != 0 )
return( ret );
/*
* write length to the first byte and update total length
*/
buf[0] = *olen;
++*olen;
return 0;
} }
/* /*

19
tests/suites/test_suite_ecp.function
View file

@ -230,7 +230,7 @@ ecp_write_binary:id:x:y:z:format:out:blen:ret
ecp_group grp; ecp_group grp;
ecp_point P; ecp_point P;
unsigned char buf[256], str[512]; unsigned char buf[256], str[512];
uint8_t olen; size_t olen;
memset( buf, 0, sizeof( buf ) ); memset( buf, 0, sizeof( buf ) );
memset( str, 0, sizeof( str ) ); memset( str, 0, sizeof( str ) );
@ -299,6 +299,7 @@ ecp_tls_write_read_point:id
ecp_group grp; ecp_group grp;
ecp_point pt; ecp_point pt;
unsigned char buf[256]; unsigned char buf[256];
size_t olen;
ecp_group_init( &grp ); ecp_group_init( &grp );
ecp_point_init( &pt ); ecp_point_init( &pt );
@ -307,27 +308,27 @@ ecp_tls_write_read_point:id
TEST_ASSERT( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_{id} ) == 0 ); TEST_ASSERT( ecp_use_known_dp( &grp, POLARSSL_ECP_DP_{id} ) == 0 );
TEST_ASSERT( ecp_tls_write_point( &grp, &grp.G, TEST_ASSERT( ecp_tls_write_point( &grp, &grp.G,
POLARSSL_ECP_PF_COMPRESSED, buf, 256 ) == 0 ); POLARSSL_ECP_PF_COMPRESSED, &olen, buf, 256 ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, 256 ) TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, olen )
== POLARSSL_ERR_ECP_BAD_INPUT_DATA ); == POLARSSL_ERR_ECP_BAD_INPUT_DATA );
TEST_ASSERT( ecp_tls_write_point( &grp, &grp.G, TEST_ASSERT( ecp_tls_write_point( &grp, &grp.G,
POLARSSL_ECP_PF_UNCOMPRESSED, buf, 256 ) == 0 ); POLARSSL_ECP_PF_UNCOMPRESSED, &olen, buf, 256 ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, 256 ) == 0 ); TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, olen ) == 0 );
TEST_ASSERT( mpi_cmp_mpi( &grp.G.X, &pt.X ) == 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.Y, &pt.Y ) == 0 );
TEST_ASSERT( mpi_cmp_mpi( &grp.G.Z, &pt.Z ) == 0 ); TEST_ASSERT( mpi_cmp_mpi( &grp.G.Z, &pt.Z ) == 0 );
TEST_ASSERT( ecp_set_zero( &pt ) == 0 ); TEST_ASSERT( ecp_set_zero( &pt ) == 0 );
TEST_ASSERT( ecp_tls_write_point( &grp, &pt, TEST_ASSERT( ecp_tls_write_point( &grp, &pt,
POLARSSL_ECP_PF_COMPRESSED, buf, 256 ) == 0 ); POLARSSL_ECP_PF_COMPRESSED, &olen, buf, 256 ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, 256 ) == 0 ); TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, olen ) == 0 );
TEST_ASSERT( ecp_is_zero( &pt ) ); TEST_ASSERT( ecp_is_zero( &pt ) );
TEST_ASSERT( ecp_set_zero( &pt ) == 0 ); TEST_ASSERT( ecp_set_zero( &pt ) == 0 );
TEST_ASSERT( ecp_tls_write_point( &grp, &pt, TEST_ASSERT( ecp_tls_write_point( &grp, &pt,
POLARSSL_ECP_PF_UNCOMPRESSED, buf, 256 ) == 0 ); POLARSSL_ECP_PF_UNCOMPRESSED, &olen, buf, 256 ) == 0 );
TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, 256 ) == 0 ); TEST_ASSERT( ecp_tls_read_point( &grp, &pt, buf, olen ) == 0 );
TEST_ASSERT( ecp_is_zero( &pt ) ); TEST_ASSERT( ecp_is_zero( &pt ) );
ecp_group_free( &grp ); ecp_group_free( &grp );