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openssl/engines/ccgost/gost_ameth.c
Ben Laurie c8bbd98a2b Fix warnings.
2010-06-12 14:13:23 +00:00

908 lines
22 KiB
C
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/**********************************************************************
* gost_ameth.c *
* Copyright (c) 2005-2006 Cryptocom LTD *
* This file is distributed under the same license as OpenSSL *
* *
* Implementation of RFC 4490/4491 ASN1 method *
* for OpenSSL *
* Requires OpenSSL 0.9.9 for compilation *
**********************************************************************/
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/engine.h>
#include <openssl/evp.h>
#include <openssl/asn1.h>
#include "gost_params.h"
#include "gost_lcl.h"
#include "e_gost_err.h"
int gost94_nid_by_params(DSA *p)
{
R3410_params *gost_params;
BIGNUM *q=BN_new();
for (gost_params = R3410_paramset;gost_params->q!=NULL; gost_params++)
{
BN_dec2bn(&q,gost_params->q);
if (!BN_cmp(q,p->q))
{
BN_free(q);
return gost_params->nid;
}
}
BN_free(q);
return NID_undef;
}
static ASN1_STRING *encode_gost_algor_params(const EVP_PKEY *key)
{
ASN1_STRING *params = ASN1_STRING_new();
GOST_KEY_PARAMS *gkp = GOST_KEY_PARAMS_new();
int pkey_param_nid = NID_undef;
if (!params || !gkp)
{
GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
ERR_R_MALLOC_FAILURE);
ASN1_STRING_free(params);
params = NULL;
goto err;
}
switch (EVP_PKEY_base_id(key))
{
case NID_id_GostR3410_2001:
pkey_param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)key)));
break;
case NID_id_GostR3410_94:
pkey_param_nid = (int) gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)key));
if (pkey_param_nid == NID_undef)
{
GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
GOST_R_INVALID_GOST94_PARMSET);
ASN1_STRING_free(params);
params=NULL;
goto err;
}
break;
}
gkp->key_params = OBJ_nid2obj(pkey_param_nid);
gkp->hash_params = OBJ_nid2obj(NID_id_GostR3411_94_CryptoProParamSet);
/*gkp->cipher_params = OBJ_nid2obj(cipher_param_nid);*/
params->length = i2d_GOST_KEY_PARAMS(gkp, &params->data);
if (params->length <=0 )
{
GOSTerr(GOST_F_ENCODE_GOST_ALGOR_PARAMS,
ERR_R_MALLOC_FAILURE);
ASN1_STRING_free(params);
params = NULL;
goto err;
}
params ->type = V_ASN1_SEQUENCE;
err:
GOST_KEY_PARAMS_free(gkp);
return params;
}
/* Parses GOST algorithm parameters from X509_ALGOR and
* modifies pkey setting NID and parameters
*/
static int decode_gost_algor_params(EVP_PKEY *pkey, X509_ALGOR *palg)
{
ASN1_OBJECT *palg_obj =NULL;
int ptype = V_ASN1_UNDEF;
int pkey_nid = NID_undef,param_nid = NID_undef;
void *_pval;
ASN1_STRING *pval = NULL;
const unsigned char *p;
GOST_KEY_PARAMS *gkp = NULL;
X509_ALGOR_get0(&palg_obj, &ptype, &_pval, palg);
pval = _pval;
if (ptype != V_ASN1_SEQUENCE)
{
GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
GOST_R_BAD_KEY_PARAMETERS_FORMAT);
return 0;
}
p=pval->data;
pkey_nid = OBJ_obj2nid(palg_obj);
gkp = d2i_GOST_KEY_PARAMS(NULL,&p,pval->length);
if (!gkp)
{
GOSTerr(GOST_F_DECODE_GOST_ALGOR_PARAMS,
GOST_R_BAD_PKEY_PARAMETERS_FORMAT);
return 0;
}
param_nid = OBJ_obj2nid(gkp->key_params);
GOST_KEY_PARAMS_free(gkp);
EVP_PKEY_set_type(pkey,pkey_nid);
switch (pkey_nid)
{
case NID_id_GostR3410_94:
{
DSA *dsa= EVP_PKEY_get0(pkey);
if (!dsa)
{
dsa = DSA_new();
if (!EVP_PKEY_assign(pkey,pkey_nid,dsa)) return 0;
}
if (!fill_GOST94_params(dsa,param_nid)) return 0;
break;
}
case NID_id_GostR3410_2001:
{
EC_KEY *ec = EVP_PKEY_get0(pkey);
if (!ec)
{
ec = EC_KEY_new();
if (!EVP_PKEY_assign(pkey,pkey_nid,ec)) return 0;
}
if (!fill_GOST2001_params(ec,param_nid)) return 0;
}
}
return 1;
}
static int gost_set_priv_key(EVP_PKEY *pkey,BIGNUM *priv)
{
switch (EVP_PKEY_base_id(pkey))
{
case NID_id_GostR3410_94:
{
DSA *dsa = EVP_PKEY_get0(pkey);
if (!dsa)
{
dsa = DSA_new();
EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),dsa);
}
dsa->priv_key = BN_dup(priv);
if (!EVP_PKEY_missing_parameters(pkey))
gost94_compute_public(dsa);
break;
}
case NID_id_GostR3410_2001:
{
EC_KEY *ec = EVP_PKEY_get0(pkey);
if (!ec)
{
ec = EC_KEY_new();
EVP_PKEY_assign(pkey,EVP_PKEY_base_id(pkey),ec);
}
if (!EC_KEY_set_private_key(ec,priv)) return 0;
if (!EVP_PKEY_missing_parameters(pkey))
gost2001_compute_public(ec);
break;
}
}
return 1;
}
BIGNUM* gost_get0_priv_key(const EVP_PKEY *pkey)
{
switch (EVP_PKEY_base_id(pkey))
{
case NID_id_GostR3410_94:
{
DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pkey);
if (!dsa)
{
return NULL;
}
if (!dsa->priv_key) return NULL;
return dsa->priv_key;
break;
}
case NID_id_GostR3410_2001:
{
EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pkey);
const BIGNUM* priv;
if (!ec)
{
return NULL;
}
if (!(priv=EC_KEY_get0_private_key(ec))) return NULL;
return (BIGNUM *)priv;
break;
}
}
return NULL;
}
static int pkey_ctrl_gost(EVP_PKEY *pkey, int op,
long arg1, void *arg2)
{
switch (op)
{
case ASN1_PKEY_CTRL_PKCS7_SIGN:
if (arg1 == 0)
{
X509_ALGOR *alg1 = NULL, *alg2 = NULL;
int nid = EVP_PKEY_base_id(pkey);
PKCS7_SIGNER_INFO_get0_algs((PKCS7_SIGNER_INFO*)arg2,
NULL, &alg1, &alg2);
X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_id_GostR3411_94),
V_ASN1_NULL, 0);
if (nid == NID_undef)
{
return (-1);
}
X509_ALGOR_set0(alg2, OBJ_nid2obj(nid), V_ASN1_NULL, 0);
}
return 1;
case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
if (arg1 == 0)
{
X509_ALGOR *alg;
ASN1_STRING * params = encode_gost_algor_params(pkey);
if (!params)
{
return -1;
}
PKCS7_RECIP_INFO_get0_alg((PKCS7_RECIP_INFO*)arg2, &alg);
X509_ALGOR_set0(alg, OBJ_nid2obj(pkey->type),
V_ASN1_SEQUENCE, params);
}
return 1;
case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
*(int *)arg2 = NID_id_GostR3411_94;
return 2;
}
return -2;
}
/*----------------------- free functions * ------------------------------*/
static void pkey_free_gost94(EVP_PKEY *key)
{
if (key->pkey.dsa)
{
DSA_free(key->pkey.dsa);
}
}
static void pkey_free_gost01(EVP_PKEY *key)
{
if (key->pkey.ec)
{
EC_KEY_free(key->pkey.ec);
}
}
/* ------------------ private key functions -----------------------------*/
static int priv_decode_gost( EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf)
{
const unsigned char *pkey_buf = NULL,*p=NULL;
int priv_len = 0;
BIGNUM *pk_num=NULL;
int ret =0;
X509_ALGOR *palg =NULL;
ASN1_OBJECT *palg_obj = NULL;
ASN1_INTEGER *priv_key=NULL;
if (!PKCS8_pkey_get0(&palg_obj,&pkey_buf,&priv_len,&palg,p8inf))
return 0;
p = pkey_buf;
if (!decode_gost_algor_params(pk,palg))
{
return 0;
}
if (V_ASN1_OCTET_STRING == *p)
{
/* New format - Little endian octet string */
unsigned char rev_buf[32];
int i;
ASN1_OCTET_STRING *s = d2i_ASN1_OCTET_STRING(NULL,&p,priv_len);
if (!s||s->length !=32)
{
GOSTerr(GOST_F_PRIV_DECODE_GOST,
EVP_R_DECODE_ERROR);
return 0;
}
for (i=0;i<32;i++)
{
rev_buf[31-i]=s->data[i];
}
ASN1_STRING_free(s);
pk_num = getbnfrombuf(rev_buf,32);
}
else
{
priv_key=d2i_ASN1_INTEGER(NULL,&p,priv_len);
if (!priv_key) return 0;
ret= ((pk_num = ASN1_INTEGER_to_BN(priv_key, NULL))!=NULL) ;
ASN1_INTEGER_free(priv_key);
if (!ret)
{
GOSTerr(GOST_F_PRIV_DECODE_GOST,
EVP_R_DECODE_ERROR);
return 0;
}
}
ret= gost_set_priv_key(pk,pk_num);
BN_free(pk_num);
return ret;
}
/* ----------------------------------------------------------------------*/
static int priv_encode_gost(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk)
{
ASN1_OBJECT *algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
ASN1_STRING *params = encode_gost_algor_params(pk);
unsigned char *priv_buf = NULL;
int priv_len;
ASN1_INTEGER *asn1key=NULL;
if (!params)
{
return 0;
}
asn1key = BN_to_ASN1_INTEGER(gost_get0_priv_key(pk),NULL);
priv_len = i2d_ASN1_INTEGER(asn1key,&priv_buf);
ASN1_INTEGER_free(asn1key);
return PKCS8_pkey_set0(p8,algobj,0,V_ASN1_SEQUENCE,params,
priv_buf,priv_len);
}
/* --------- printing keys --------------------------------*/
static int print_gost_94(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx, int type)
{
int param_nid = NID_undef;
if (type == 2)
{
BIGNUM *key;
if (!BIO_indent(out,indent,128)) return 0;
BIO_printf(out,"Private key: ");
key = gost_get0_priv_key(pkey);
if (!key)
BIO_printf(out,"<undefined>");
else
BN_print(out,key);
BIO_printf(out,"\n");
}
if (type >= 1)
{
BIGNUM *pubkey;
pubkey = ((DSA *)EVP_PKEY_get0((EVP_PKEY *)pkey))->pub_key;
BIO_indent(out,indent,128);
BIO_printf(out,"Public key: ");
BN_print(out,pubkey);
BIO_printf(out,"\n");
}
param_nid = gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)pkey));
BIO_indent(out,indent,128);
BIO_printf(out, "Parameter set: %s\n",OBJ_nid2ln(param_nid));
return 1;
}
static int param_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
return print_gost_94(out, pkey, indent, pctx,0);
}
static int pub_print_gost94(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
return print_gost_94(out,pkey, indent, pctx,1);
}
static int priv_print_gost94(BIO *out,const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
return print_gost_94(out,pkey,indent,pctx,2);
}
static int print_gost_01(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx, int type)
{
int param_nid = NID_undef;
if (type == 2)
{
BIGNUM *key;
if (!BIO_indent(out,indent,128)) return 0;
BIO_printf(out,"Private key: ");
key = gost_get0_priv_key(pkey);
if (!key)
BIO_printf(out,"<undefined)");
else
BN_print(out,key);
BIO_printf(out,"\n");
}
if (type >= 1)
{
BN_CTX *ctx = BN_CTX_new();
BIGNUM *X,*Y;
const EC_POINT *pubkey;
const EC_GROUP *group;
if (!ctx)
{
GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_MALLOC_FAILURE);
return 0;
}
BN_CTX_start(ctx);
X = BN_CTX_get(ctx);
Y = BN_CTX_get(ctx);
pubkey = EC_KEY_get0_public_key((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
group = EC_KEY_get0_group((EC_KEY *)EVP_PKEY_get0((EVP_PKEY *)pkey));
if (!EC_POINT_get_affine_coordinates_GFp(group,pubkey,X,Y,ctx))
{
GOSTerr(GOST_F_PRINT_GOST_01,ERR_R_EC_LIB);
BN_CTX_free(ctx);
return 0;
}
if (!BIO_indent(out,indent,128)) return 0;
BIO_printf(out,"Public key:\n");
if (!BIO_indent(out,indent+3,128)) return 0;
BIO_printf(out,"X:");
BN_print(out,X);
BIO_printf(out,"\n");
BIO_indent(out,indent+3,128);
BIO_printf(out,"Y:");
BN_print(out,Y);
BIO_printf(out,"\n");
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
param_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
if (!BIO_indent(out,indent,128)) return 0;
BIO_printf(out,"Parameter set: %s\n",OBJ_nid2ln(param_nid));
return 1;
}
static int param_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
return print_gost_01(out,pkey,indent,pctx,0);
}
static int pub_print_gost01(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
return print_gost_01(out,pkey, indent, pctx,1);
}
static int priv_print_gost01(BIO *out,const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
return print_gost_01(out,pkey,indent,pctx,2);
}
/* ---------------------------------------------------------------------*/
static int param_missing_gost94(const EVP_PKEY *pk)
{
const DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
if (!dsa) return 1;
if (!dsa->q) return 1;
return 0;
}
static int param_missing_gost01(const EVP_PKEY *pk)
{
const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
if (!ec) return 1;
if (!EC_KEY_get0_group(ec)) return 1;
return 0;
}
static int param_copy_gost94(EVP_PKEY *to, const EVP_PKEY *from)
{
const DSA *dfrom = EVP_PKEY_get0((EVP_PKEY *)from);
DSA *dto = EVP_PKEY_get0(to);
if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
{
GOSTerr(GOST_F_PARAM_COPY_GOST94,
GOST_R_INCOMPATIBLE_ALGORITHMS);
return 0;
}
if (!dfrom)
{
GOSTerr(GOST_F_PARAM_COPY_GOST94,
GOST_R_KEY_PARAMETERS_MISSING);
return 0;
}
if (!dto)
{
dto = DSA_new();
EVP_PKEY_assign(to,EVP_PKEY_base_id(from),dto);
}
#define COPYBIGNUM(a,b,x) if (a->x) BN_free(a->x); a->x=BN_dup(b->x);
COPYBIGNUM(dto,dfrom,p)
COPYBIGNUM(dto,dfrom,q)
COPYBIGNUM(dto,dfrom,g)
if (dto->priv_key)
gost94_compute_public(dto);
return 1;
}
static int param_copy_gost01(EVP_PKEY *to, const EVP_PKEY *from)
{
EC_KEY *eto = EVP_PKEY_get0(to);
const EC_KEY *efrom = EVP_PKEY_get0((EVP_PKEY *)from);
if (EVP_PKEY_base_id(from) != EVP_PKEY_base_id(to))
{
GOSTerr(GOST_F_PARAM_COPY_GOST01,
GOST_R_INCOMPATIBLE_ALGORITHMS);
return 0;
}
if (!efrom)
{
GOSTerr(GOST_F_PARAM_COPY_GOST01,
GOST_R_KEY_PARAMETERS_MISSING);
return 0;
}
if (!eto)
{
eto = EC_KEY_new();
EVP_PKEY_assign(to,EVP_PKEY_base_id(from),eto);
}
EC_KEY_set_group(eto,EC_KEY_get0_group(efrom));
if (EC_KEY_get0_private_key(eto))
{
gost2001_compute_public(eto);
}
return 1;
}
static int param_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
{
const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
if (!BN_cmp(da->q,db->q)) return 1;
return 0;
}
static int param_cmp_gost01(const EVP_PKEY *a, const EVP_PKEY *b)
{
if (EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)a)))==
EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)b))))
{
return 1;
}
return 0;
}
/* ---------- Public key functions * --------------------------------------*/
static int pub_decode_gost94(EVP_PKEY *pk, X509_PUBKEY *pub)
{
X509_ALGOR *palg = NULL;
const unsigned char *pubkey_buf = NULL;
unsigned char *databuf;
ASN1_OBJECT *palgobj = NULL;
int pub_len,i,j;
DSA *dsa;
ASN1_OCTET_STRING *octet= NULL;
if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
&palg, pub)) return 0;
EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
if (!decode_gost_algor_params(pk,palg)) return 0;
octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
if (!octet)
{
GOSTerr(GOST_F_PUB_DECODE_GOST94,ERR_R_MALLOC_FAILURE);
return 0;
}
databuf = OPENSSL_malloc(octet->length);
for (i=0,j=octet->length-1;i<octet->length;i++,j--)
{
databuf[j]=octet->data[i];
}
dsa = EVP_PKEY_get0(pk);
dsa->pub_key=BN_bin2bn(databuf,octet->length,NULL);
ASN1_OCTET_STRING_free(octet);
OPENSSL_free(databuf);
return 1;
}
static int pub_encode_gost94(X509_PUBKEY *pub,const EVP_PKEY *pk)
{
ASN1_OBJECT *algobj = NULL;
ASN1_OCTET_STRING *octet = NULL;
void *pval = NULL;
unsigned char *buf=NULL,*databuf,*sptr;
int i,j,data_len,ret=0;
int ptype = V_ASN1_UNDEF;
DSA *dsa = EVP_PKEY_get0((EVP_PKEY *)pk);
algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
if (pk->save_parameters)
{
ASN1_STRING *params = encode_gost_algor_params(pk);
pval = params;
ptype = V_ASN1_SEQUENCE;
}
data_len = BN_num_bytes(dsa->pub_key);
databuf = OPENSSL_malloc(data_len);
BN_bn2bin(dsa->pub_key,databuf);
octet = ASN1_OCTET_STRING_new();
ASN1_STRING_set(octet,NULL,data_len);
sptr = ASN1_STRING_data(octet);
for (i=0,j=data_len-1; i< data_len;i++,j--)
{
sptr[i]=databuf[j];
}
OPENSSL_free(databuf);
ret = i2d_ASN1_OCTET_STRING(octet,&buf);
ASN1_BIT_STRING_free(octet);
if (ret <0) return 0;
return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
}
static int pub_decode_gost01(EVP_PKEY *pk,X509_PUBKEY *pub)
{
X509_ALGOR *palg = NULL;
const unsigned char *pubkey_buf = NULL;
unsigned char *databuf;
ASN1_OBJECT *palgobj = NULL;
int pub_len,i,j;
EC_POINT *pub_key;
BIGNUM *X,*Y;
ASN1_OCTET_STRING *octet= NULL;
int len;
const EC_GROUP *group;
if (!X509_PUBKEY_get0_param(&palgobj,&pubkey_buf,&pub_len,
&palg, pub)) return 0;
EVP_PKEY_assign(pk,OBJ_obj2nid(palgobj),NULL);
if (!decode_gost_algor_params(pk,palg)) return 0;
group = EC_KEY_get0_group(EVP_PKEY_get0(pk));
octet = d2i_ASN1_OCTET_STRING(NULL,&pubkey_buf,pub_len);
if (!octet)
{
GOSTerr(GOST_F_PUB_DECODE_GOST01,ERR_R_MALLOC_FAILURE);
return 0;
}
databuf = OPENSSL_malloc(octet->length);
for (i=0,j=octet->length-1;i<octet->length;i++,j--)
{
databuf[j]=octet->data[i];
}
len=octet->length/2;
ASN1_OCTET_STRING_free(octet);
Y= getbnfrombuf(databuf,len);
X= getbnfrombuf(databuf+len,len);
OPENSSL_free(databuf);
pub_key = EC_POINT_new(group);
if (!EC_POINT_set_affine_coordinates_GFp(group
,pub_key,X,Y,NULL))
{
GOSTerr(GOST_F_PUB_DECODE_GOST01,
ERR_R_EC_LIB);
EC_POINT_free(pub_key);
BN_free(X);
BN_free(Y);
return 0;
}
BN_free(X);
BN_free(Y);
if (!EC_KEY_set_public_key(EVP_PKEY_get0(pk),pub_key))
{
GOSTerr(GOST_F_PUB_DECODE_GOST01,
ERR_R_EC_LIB);
EC_POINT_free(pub_key);
return 0;
}
EC_POINT_free(pub_key);
return 1;
}
static int pub_encode_gost01(X509_PUBKEY *pub,const EVP_PKEY *pk)
{
ASN1_OBJECT *algobj = NULL;
ASN1_OCTET_STRING *octet = NULL;
void *pval = NULL;
unsigned char *buf=NULL,*databuf,*sptr;
int i,j,data_len,ret=0;
const EC_POINT *pub_key;
BIGNUM *X,*Y,*order;
const EC_KEY *ec = EVP_PKEY_get0((EVP_PKEY *)pk);
int ptype = V_ASN1_UNDEF;
algobj = OBJ_nid2obj(EVP_PKEY_base_id(pk));
if (pk->save_parameters)
{
ASN1_STRING *params = encode_gost_algor_params(pk);
pval = params;
ptype = V_ASN1_SEQUENCE;
}
order = BN_new();
EC_GROUP_get_order(EC_KEY_get0_group(ec),order,NULL);
pub_key=EC_KEY_get0_public_key(ec);
if (!pub_key)
{
GOSTerr(GOST_F_PUB_ENCODE_GOST01,
GOST_R_PUBLIC_KEY_UNDEFINED);
return 0;
}
X=BN_new();
Y=BN_new();
EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec),
pub_key,X,Y,NULL);
data_len = 2*BN_num_bytes(order);
BN_free(order);
databuf = OPENSSL_malloc(data_len);
memset(databuf,0,data_len);
store_bignum(X,databuf+data_len/2,data_len/2);
store_bignum(Y,databuf,data_len/2);
BN_free(X);
BN_free(Y);
octet = ASN1_OCTET_STRING_new();
ASN1_STRING_set(octet,NULL,data_len);
sptr=ASN1_STRING_data(octet);
for (i=0,j=data_len-1;i<data_len;i++,j--)
{
sptr[i]=databuf[j];
}
OPENSSL_free(databuf);
ret = i2d_ASN1_OCTET_STRING(octet,&buf);
ASN1_BIT_STRING_free(octet);
if (ret <0) return 0;
return X509_PUBKEY_set0_param(pub,algobj,ptype,pval,buf,ret);
}
static int pub_cmp_gost94(const EVP_PKEY *a, const EVP_PKEY *b)
{
const DSA *da = EVP_PKEY_get0((EVP_PKEY *)a);
const DSA *db = EVP_PKEY_get0((EVP_PKEY *)b);
if (da && db && da->pub_key && db->pub_key
&& !BN_cmp(da->pub_key,db->pub_key))
{
return 1;
}
return 0;
}
static int pub_cmp_gost01(const EVP_PKEY *a,const EVP_PKEY *b)
{
const EC_KEY *ea = EVP_PKEY_get0((EVP_PKEY *)a);
const EC_KEY *eb = EVP_PKEY_get0((EVP_PKEY *)b);
const EC_POINT *ka,*kb;
int ret=0;
if (!ea || !eb) return 0;
ka = EC_KEY_get0_public_key(ea);
kb = EC_KEY_get0_public_key(eb);
if (!ka || !kb) return 0;
ret = (0==EC_POINT_cmp(EC_KEY_get0_group(ea),ka,kb,NULL)) ;
return ret;
}
static int pkey_size_gost(const EVP_PKEY *pk)
{
return 64;
}
static int pkey_bits_gost(const EVP_PKEY *pk)
{
return 256;
}
/*------------------------ ASN1 METHOD for GOST MAC -------------------*/
static void mackey_free_gost(EVP_PKEY *pk)
{
if (pk->pkey.ptr) {
OPENSSL_free(pk->pkey.ptr);
}
}
static int mac_ctrl_gost(EVP_PKEY *pkey, int op, long arg1, void *arg2)
{
switch (op)
{
case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
*(int *)arg2 = NID_id_Gost28147_89_MAC;
return 2;
}
return -2;
}
static int gost94_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
{
int nid=gost94_nid_by_params(EVP_PKEY_get0((EVP_PKEY *)pkey));
return i2d_ASN1_OBJECT(OBJ_nid2obj(nid),pder);
}
static int gost2001_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
{
int nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(EVP_PKEY_get0((EVP_PKEY *)pkey)));
return i2d_ASN1_OBJECT(OBJ_nid2obj(nid),pder);
}
static int gost94_param_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen)
{
ASN1_OBJECT *obj=NULL;
DSA *dsa = EVP_PKEY_get0(pkey);
int nid;
if (d2i_ASN1_OBJECT(&obj,pder,derlen)==NULL) {
return 0;
}
nid = OBJ_obj2nid(obj);
ASN1_OBJECT_free(obj);
if (!dsa)
{
dsa=DSA_new();
if (!EVP_PKEY_assign(pkey,NID_id_GostR3410_94,dsa)) return 0;
}
if (!fill_GOST94_params(dsa,nid)) return 0;
return 1;
}
static int gost2001_param_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen) {
ASN1_OBJECT *obj=NULL;
int nid;
EC_KEY *ec = EVP_PKEY_get0(pkey);
if (d2i_ASN1_OBJECT(&obj,pder,derlen)==NULL) {
return 0;
}
nid = OBJ_obj2nid(obj);
ASN1_OBJECT_free(obj);
if (!ec)
{
ec = EC_KEY_new();
if (!EVP_PKEY_assign(pkey,NID_id_GostR3410_2001,ec)) return 0;
}
if (!fill_GOST2001_params(ec, nid)) return 0;
return 1;
}
/* ----------------------------------------------------------------------*/
int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info)
{
*ameth = EVP_PKEY_asn1_new(nid,
ASN1_PKEY_SIGPARAM_NULL, pemstr, info);
if (!*ameth) return 0;
switch (nid)
{
case NID_id_GostR3410_94:
EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost94);
EVP_PKEY_asn1_set_private (*ameth,
priv_decode_gost, priv_encode_gost,
priv_print_gost94);
EVP_PKEY_asn1_set_param (*ameth,
gost94_param_decode, gost94_param_encode,
param_missing_gost94, param_copy_gost94,
param_cmp_gost94,param_print_gost94 );
EVP_PKEY_asn1_set_public (*ameth,
pub_decode_gost94, pub_encode_gost94,
pub_cmp_gost94, pub_print_gost94,
pkey_size_gost, pkey_bits_gost);
EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
break;
case NID_id_GostR3410_2001:
EVP_PKEY_asn1_set_free (*ameth, pkey_free_gost01);
EVP_PKEY_asn1_set_private (*ameth,
priv_decode_gost, priv_encode_gost,
priv_print_gost01);
EVP_PKEY_asn1_set_param (*ameth,
gost2001_param_decode, gost2001_param_encode,
param_missing_gost01, param_copy_gost01,
param_cmp_gost01, param_print_gost01);
EVP_PKEY_asn1_set_public (*ameth,
pub_decode_gost01, pub_encode_gost01,
pub_cmp_gost01, pub_print_gost01,
pkey_size_gost, pkey_bits_gost);
EVP_PKEY_asn1_set_ctrl (*ameth, pkey_ctrl_gost);
break;
case NID_id_Gost28147_89_MAC:
EVP_PKEY_asn1_set_free(*ameth, mackey_free_gost);
EVP_PKEY_asn1_set_ctrl(*ameth,mac_ctrl_gost);
break;
}
return 1;
}
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