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Merged EC key generation support

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This commit is contained in:
Paul Bakker 2013-12-02 14:54:01 +01:00
parent 4040d7e95c 6e16cdb37c
commit 014f143c2a
7 changed files with 196 additions and 23 deletions
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3
ChangeLog
View file

@ -1,6 +1,9 @@
PolarSSL ChangeLog (Sorted per branch, date)
= PolarSSL 1.3 branch
Features
* EC key generation support in gen_key app
Changes
* gen_prime() speedup
* Speedup of ECP multiplication operation

23
include/polarssl/ecp.h
View file

@ -204,6 +204,15 @@ const ecp_curve_info *ecp_curve_info_from_grp_id( ecp_group_id grp_id );
*/
const ecp_curve_info *ecp_curve_info_from_tls_id( uint16_t tls_id );
/**
* \brief Get curve information from a human-readable name
*
* \param name The name
*
* \return The associated curve information or NULL
*/
const ecp_curve_info *ecp_curve_info_from_name( const char *name );
/**
* \brief Initialize a point (as zero)
*/
@ -535,6 +544,20 @@ int ecp_gen_keypair( ecp_group *grp, mpi *d, ecp_point *Q,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng );
/**
* \brief Generate a keypair
*
* \param grp_id ECP group identifier
* \param key Destination keypair
* \param f_rng RNG function
* \param p_rng RNG parameter
*
* \return 0 if successful,
* or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code
*/
int ecp_gen_key( ecp_group_id grp_id, ecp_keypair *key,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
/**
* \brief Checkup routine
*

43
library/ecp.c
View file

@ -58,6 +58,11 @@
#include <limits.h>
#include <stdlib.h>
#if defined(_MSC_VER) && !defined strcasecmp && !defined(EFIX64) && \
!defined(EFI32)
#define strcasecmp _stricmp
#endif
#if defined(_MSC_VER) && !defined(inline)
#define inline _inline
#else
@ -84,13 +89,13 @@ unsigned long add_count, dbl_count, mul_count;
const ecp_curve_info ecp_supported_curves[] =
{
#if defined(POLARSSL_ECP_DP_BP512R1_ENABLED)
{ POLARSSL_ECP_DP_BP512R1, 28, 512, "brainpool512r1" },
{ POLARSSL_ECP_DP_BP512R1, 28, 512, "brainpoolP512r1" },
#endif
#if defined(POLARSSL_ECP_DP_BP384R1_ENABLED)
{ POLARSSL_ECP_DP_BP384R1, 27, 384, "brainpool384r1" },
{ POLARSSL_ECP_DP_BP384R1, 27, 384, "brainpoolP384r1" },
#endif
#if defined(POLARSSL_ECP_DP_BP256R1_ENABLED)
{ POLARSSL_ECP_DP_BP256R1, 26, 256, "brainpool256r1" },
{ POLARSSL_ECP_DP_BP256R1, 26, 256, "brainpoolP256r1" },
#endif
#if defined(POLARSSL_ECP_DP_SECP521R1_ENABLED)
{ POLARSSL_ECP_DP_SECP521R1, 25, 521, "secp521r1" },
@ -154,6 +159,24 @@ const ecp_curve_info *ecp_curve_info_from_tls_id( uint16_t tls_id )
return( NULL );
}
/*
* Get the curve info from the name
*/
const ecp_curve_info *ecp_curve_info_from_name( const char *name )
{
const ecp_curve_info *curve_info;
for( curve_info = ecp_curve_list();
curve_info->grp_id != POLARSSL_ECP_DP_NONE;
curve_info++ )
{
if( strcasecmp( curve_info->name, name ) == 0 )
return( curve_info );
}
return( NULL );
}
/*
* Initialize (the components of) a point
*/
@ -1669,6 +1692,20 @@ int ecp_gen_keypair( ecp_group *grp, mpi *d, ecp_point *Q,
return( ecp_mul( grp, Q, d, &grp->G, f_rng, p_rng ) );
}
/*
* Generate a keypair, prettier wrapper
*/
int ecp_gen_key( ecp_group_id grp_id, ecp_keypair *key,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
int ret;
if( ( ret = ecp_use_known_dp( &key->grp, grp_id ) ) != 0 )
return( ret );
return( ecp_gen_keypair( &key->grp, &key->d, &key->Q, f_rng, p_rng ) );
}
#if defined(POLARSSL_ECP_NIST_OPTIM)
/*
* Fast reduction modulo the primes used by the NIST curves.

3
programs/.gitignore vendored
View file

@ -47,3 +47,6 @@ x509/cert_req
x509/crl_app
x509/cert_write
x509/req_app
# generated files
pkey/keyfile.key

71
programs/pkey/gen_key.c
View file

@ -51,13 +51,12 @@ int main( int argc, char *argv[] )
}
#else
#define TYPE_RSA 0
#define FORMAT_PEM 0
#define FORMAT_DER 1
#define DFL_TYPE TYPE_RSA
#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
@ -68,6 +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;
@ -111,8 +111,9 @@ static int write_private_key( pk_context *key, const char *output_file )
#define USAGE \
"\n usage: gen_key param=<>...\n" \
"\n acceptable parameters:\n" \
" type=rsa default: rsa\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"
@ -127,6 +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
@ -139,11 +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;
@ -157,7 +169,9 @@ int main( int argc, char *argv[] )
if( strcmp( p, "type" ) == 0 )
{
if( strcmp( q, "rsa" ) == 0 )
opt.type = TYPE_RSA;
opt.type = POLARSSL_PK_RSA;
if( strcmp( q, "ec" ) == 0 )
opt.type = POLARSSL_PK_ECKEY;
else
goto usage;
}
@ -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
@ -200,10 +220,15 @@ int main( int argc, char *argv[] )
printf( "\n . Generating the private key ..." );
fflush( stdout );
#if defined(POLARSSL_RSA_C) && defined(POLARSSL_GENPRIME)
if( opt.type == TYPE_RSA )
if( ( ret = pk_init_ctx( &key, pk_info_from_type( opt.type ) ) ) != 0 )
{
printf( " failed\n ! pk_init_ctx returned -0x%04x", -ret );
goto exit;
}
#if defined(POLARSSL_RSA_C) && defined(POLARSSL_GENPRIME)
if( opt.type == POLARSSL_PK_RSA )
{
pk_init_ctx( &key, pk_info_from_type( POLARSSL_PK_RSA ) );
ret = rsa_gen_key( pk_rsa( key ), ctr_drbg_random, &ctr_drbg,
opt.rsa_keysize, 65537 );
if( ret != 0 )
@ -211,20 +236,31 @@ int main( int argc, char *argv[] )
printf( " failed\n ! rsa_gen_key returned -0x%04x", -ret );
goto exit;
}
printf( " ok\n" );
}
else
#endif /* POLARSSL_RSA_C */
#if defined(POLARSSL_ECP_C)
if( opt.type == POLARSSL_PK_ECKEY )
{
printf( " failed\n ! key type not supported in library" );
ret = ecp_gen_key( opt.ec_curve, pk_ec( key ),
ctr_drbg_random, &ctr_drbg );
if( ret != 0 )
{
printf( " failed\n ! rsa_gen_key returned -0x%04x", -ret );
goto exit;
}
}
else
#endif /* POLARSSL_ECP_C */
{
printf( " failed\n ! key type not supported\n" );
goto exit;
}
/*
* 1.2 Print the key
*/
printf( " . Key information ...\n" );
printf( " ok\n . Key information:\n" );
#if defined(POLARSSL_RSA_C)
if( pk_get_type( &key ) == POLARSSL_PK_RSA )
@ -245,14 +281,15 @@ int main( int argc, char *argv[] )
if( pk_get_type( &key ) == POLARSSL_PK_ECKEY )
{
ecp_keypair *ecp = pk_ec( key );
mpi_write_file( "Q(X): ", &ecp->Q.X, 16, NULL );
mpi_write_file( "Q(Y): ", &ecp->Q.Y, 16, NULL );
mpi_write_file( "Q(Z): ", &ecp->Q.Z, 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
printf("key type not supported yet\n");
printf(" ! key type not supported\n");
write_private_key( &key, opt.filename );

36
tests/suites/test_suite_ecp.data
View file

@ -1,3 +1,35 @@
ECP curve info #1
depends_on:POLARSSL_ECP_DP_BP512R1_ENABLED
ecp_curve_info:POLARSSL_ECP_DP_BP512R1:28:512:"brainpoolP512r1"
ECP curve info #2
depends_on:POLARSSL_ECP_DP_BP384R1_ENABLED
ecp_curve_info:POLARSSL_ECP_DP_BP384R1:27:384:"brainpoolP384r1"
ECP curve info #3
depends_on:POLARSSL_ECP_DP_BP256R1_ENABLED
ecp_curve_info:POLARSSL_ECP_DP_BP256R1:26:256:"brainpoolP256r1"
ECP curve info #4
depends_on:POLARSSL_ECP_DP_SECP521R1_ENABLED
ecp_curve_info:POLARSSL_ECP_DP_SECP521R1:25:521:"secp521r1"
ECP curve info #5
depends_on:POLARSSL_ECP_DP_SECP384R1_ENABLED
ecp_curve_info:POLARSSL_ECP_DP_SECP384R1:24:384:"secp384r1"
ECP curve info #6
depends_on:POLARSSL_ECP_DP_SECP256R1_ENABLED
ecp_curve_info:POLARSSL_ECP_DP_SECP256R1:23:256:"secp256r1"
ECP curve info #7
depends_on:POLARSSL_ECP_DP_SECP224R1_ENABLED
ecp_curve_info:POLARSSL_ECP_DP_SECP224R1:21:224:"secp224r1"
ECP curve info #8
depends_on:POLARSSL_ECP_DP_SECP192R1_ENABLED
ecp_curve_info:POLARSSL_ECP_DP_SECP192R1:19:192:"secp192r1"
ECP small addition #1
ecp_small_add:1:"":"":1:"":"":1:0:0
@ -247,6 +279,10 @@ ECP gen keypair
depends_on:POLARSSL_ECP_DP_SECP192R1_ENABLED
ecp_gen_keypair:POLARSSL_ECP_DP_SECP192R1
ECP gen keypair wrapper
depends_on:POLARSSL_ECP_DP_SECP192R1_ENABLED
ecp_gen_key:POLARSSL_ECP_DP_SECP192R1
ECP mod p192 small (more than 192 bits, less limbs than 2 * 192 bits)
depends_on:POLARSSL_ECP_DP_SECP192R1_ENABLED
ecp_fast_mod:POLARSSL_ECP_DP_SECP192R1:"0100000000000103010000000000010201000000000001010100000000000100"

34
tests/suites/test_suite_ecp.function
View file

@ -9,6 +9,22 @@
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void ecp_curve_info( int id, int tls_id, int size, char *name )
{
const ecp_curve_info *by_id, *by_tls, *by_name;
TEST_ASSERT( ( by_id = ecp_curve_info_from_grp_id( id ) ) != NULL );
TEST_ASSERT( ( by_tls = ecp_curve_info_from_tls_id( tls_id ) ) != NULL );
TEST_ASSERT( ( by_name = ecp_curve_info_from_name( name ) ) != NULL );
TEST_ASSERT( by_id == by_tls );
TEST_ASSERT( by_id == by_name );
TEST_ASSERT( by_id->size == size );
}
/* END_CASE */
/* BEGIN_CASE */
void ecp_small_add( int a_zero, char *x_a, char *y_a, int b_zero, char *x_b,
char *y_b, int c_zero, int x_c, int y_c )
@ -522,6 +538,24 @@ void ecp_gen_keypair( int id )
}
/* END_CASE */
/* BEGIN_CASE */
void ecp_gen_key( int id )
{
ecp_keypair key;
rnd_pseudo_info rnd_info;
ecp_keypair_init( &key );
memset( &rnd_info, 0x00, sizeof( rnd_pseudo_info ) );
TEST_ASSERT( ecp_gen_key( id, &key, &rnd_pseudo_rand, &rnd_info ) == 0 );
TEST_ASSERT( ecp_check_pubkey( &key.grp, &key.Q ) == 0 );
TEST_ASSERT( ecp_check_privkey( &key.grp, &key.d ) == 0 );
ecp_keypair_free( &key );
}
/* END_CASE */
/* BEGIN_CASE depends_on:POLARSSL_SELF_TEST */
void ecp_selftest()
{