--- /dev/null
+/**********************************************************************
+ * 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>
+#ifndef OPENSSL_NO_CMS
+#include <openssl/cms.h>
+#endif
+#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, ¶ms->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;
+#ifndef OPENSSL_NO_CMS
+ case ASN1_PKEY_CTRL_CMS_SIGN:
+ if (arg1 == 0)
+ {
+ X509_ALGOR *alg1 = NULL, *alg2 = NULL;
+ int nid = EVP_PKEY_base_id(pkey);
+ CMS_SignerInfo_get0_algs((CMS_SignerInfo *)arg2,
+ NULL, 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;
+#endif
+ 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;
+#ifndef OPENSSL_NO_CMS
+ case ASN1_PKEY_CTRL_CMS_ENVELOPE:
+ if (arg1 == 0)
+ {
+ X509_ALGOR *alg = NULL;
+ ASN1_STRING * params = encode_gost_algor_params(pkey);
+ if (!params)
+ {
+ return -1;
+ }
+ CMS_RecipientInfo_ktri_get0_algs((CMS_RecipientInfo *)arg2, NULL, NULL, &alg);
+ X509_ALGOR_set0(alg, OBJ_nid2obj(pkey->type),
+ V_ASN1_SEQUENCE, params);
+ }
+ return 1;
+#endif
+ 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;
+ }
projects / cassiopeia.git / blobdiff