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Allow curve selection in gen_key

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Manuel Pégourié-Gonnard 2013-11-30 15:32:47 +01:00
parent 0267e3dc9b
commit 6e16cdb37c
1 changed files with 26 additions and 5 deletions
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31
programs/pkey/gen_key.c
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@ -56,6 +56,7 @@ int main( int argc, char *argv[] )
#define DFL_TYPE POLARSSL_PK_RSA
#define DFL_RSA_KEYSIZE 4096
#define DFL_EC_CURVE ecp_curve_list()->grp_id
#define DFL_FILENAME "keyfile.key"
#define DFL_FORMAT FORMAT_PEM
@ -66,6 +67,7 @@ struct options
{
int type; /* the type of key to generate */
int rsa_keysize; /* length of key in bits */
int ec_curve; /* curve identifier for EC keys */
const char *filename; /* filename of the key file */
int format; /* the output format to use */
} opt;
@ -111,6 +113,7 @@ static int write_private_key( pk_context *key, const char *output_file )
"\n acceptable parameters:\n" \
" type=rsa|ec default: rsa\n" \
" rsa_keysize=%%d default: 4096\n" \
" ec_curve=%%s see below\n" \
" filename=%%s default: keyfile.key\n" \
" format=pem|der default: pem\n" \
"\n"
@ -125,6 +128,9 @@ int main( int argc, char *argv[] )
entropy_context entropy;
ctr_drbg_context ctr_drbg;
const char *pers = "gen_key";
#if defined(POLARSSL_ECP_C)
const ecp_curve_info *curve_info;
#endif
/*
* Set to sane values
@ -137,11 +143,19 @@ int main( int argc, char *argv[] )
usage:
ret = 1;
printf( USAGE );
#if defined(POLARSSL_ECP_C)
printf( " availabled ec_curve values:\n" );
curve_info = ecp_curve_list();
printf( " %s (default)\n", curve_info->name );
while( ( ++curve_info )->name != NULL )
printf( " %s\n", curve_info->name );
#endif
goto exit;
}
opt.type = DFL_TYPE;
opt.rsa_keysize = DFL_RSA_KEYSIZE;
opt.ec_curve = DFL_EC_CURVE;
opt.filename = DFL_FILENAME;
opt.format = DFL_FORMAT;
@ -176,6 +190,12 @@ int main( int argc, char *argv[] )
if( opt.rsa_keysize < 1024 || opt.rsa_keysize > 8192 )
goto usage;
}
else if( strcmp( p, "ec_curve" ) == 0 )
{
if( ( curve_info = ecp_curve_info_from_name( q ) ) == NULL )
goto usage;
opt.ec_curve = curve_info->grp_id;
}
else if( strcmp( p, "filename" ) == 0 )
opt.filename = q;
else
@ -222,8 +242,7 @@ int main( int argc, char *argv[] )
#if defined(POLARSSL_ECP_C)
if( opt.type == POLARSSL_PK_ECKEY )
{
// TODO: allow other curves
ret = ecp_gen_key( POLARSSL_ECP_DP_SECP256R1, pk_ec( key ),
ret = ecp_gen_key( opt.ec_curve, pk_ec( key ),
ctr_drbg_random, &ctr_drbg );
if( ret != 0 )
{
@ -262,9 +281,11 @@ int main( int argc, char *argv[] )
if( pk_get_type( &key ) == POLARSSL_PK_ECKEY )
{
ecp_keypair *ecp = pk_ec( key );
mpi_write_file( "X_Q: ", &ecp->Q.X, 16, NULL );
mpi_write_file( "Y_Q: ", &ecp->Q.Y, 16, NULL );
mpi_write_file( "D : ", &ecp->d , 16, NULL );
printf( "curve: %s\n",
ecp_curve_info_from_grp_id( ecp->grp.id )->name );
mpi_write_file( "X_Q: ", &ecp->Q.X, 16, NULL );
mpi_write_file( "Y_Q: ", &ecp->Q.Y, 16, NULL );
mpi_write_file( "D: ", &ecp->d , 16, NULL );
}
else
#endif