/********************************************************************** * gost_pmeth.c * * Copyright (c) 2005-2006 Cryptocom LTD * * This file is distributed under the same license as OpenSSL * * * * Implementation of RFC 4357 (GOST R 34.10) Publick key method * * for OpenSSL * * Requires OpenSSL 0.9.9 for compilation * **********************************************************************/ #include #include #include #include /*For string_to_hex */ #include #include #include #include "gost_params.h" #include "gost_lcl.h" #include "e_gost_err.h" /*-------init, cleanup, copy - uniform for all algs ---------------*/ /* Allocates new gost_pmeth_data structure and assigns it as data */ static int pkey_gost_init(EVP_PKEY_CTX *ctx) { struct gost_pmeth_data *data; data = OPENSSL_malloc(sizeof(struct gost_pmeth_data)); if (!data) return 0; memset(data,0,sizeof(struct gost_pmeth_data)); EVP_PKEY_CTX_set_data(ctx,data); return 1; } /* Copies contents of gost_pmeth_data structure */ static int pkey_gost_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) { struct gost_pmeth_data *dst_data,*src_data; if (!pkey_gost_init(dst)) { return 0; } src_data = EVP_PKEY_CTX_get_data(src); dst_data = EVP_PKEY_CTX_get_data(dst); *dst_data = *src_data; if (src_data -> shared_ukm) { dst_data->shared_ukm=NULL; } return 1; } /* Frees up gost_pmeth_data structure */ static void pkey_gost_cleanup (EVP_PKEY_CTX *ctx) { struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); if (data->shared_ukm) OPENSSL_free(data->shared_ukm); OPENSSL_free(data); } /* --------------------- control functions ------------------------------*/ static int pkey_gost_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) { struct gost_pmeth_data *pctx = (struct gost_pmeth_data*)EVP_PKEY_CTX_get_data(ctx); switch (type) { case EVP_PKEY_CTRL_MD: { if (EVP_MD_type((const EVP_MD *)p2) != NID_id_GostR3411_94) { GOSTerr(GOST_F_PKEY_GOST_CTRL, GOST_R_INVALID_DIGEST_TYPE); return 0; } pctx->md = (EVP_MD *)p2; return 1; } break; case EVP_PKEY_CTRL_PKCS7_ENCRYPT: case EVP_PKEY_CTRL_PKCS7_DECRYPT: case EVP_PKEY_CTRL_PKCS7_SIGN: return 1; case EVP_PKEY_CTRL_GOST_PARAMSET: pctx->sign_param_nid = (int)p1; return 1; case EVP_PKEY_CTRL_SET_IV: pctx->shared_ukm=OPENSSL_malloc((int)p1); memcpy(pctx->shared_ukm,p2,(int) p1); return 1; } return -2; } static int pkey_gost_ctrl94_str(EVP_PKEY_CTX *ctx, const char *type, const char *value) { int param_nid=0; if(!strcmp(type, param_ctrl_string)) { if (!value) { return 0; } if (strlen(value) == 1) { switch(toupper(value[0])) { case 'A': param_nid = NID_id_GostR3410_94_CryptoPro_A_ParamSet; break; case 'B': param_nid = NID_id_GostR3410_94_CryptoPro_B_ParamSet; break; case 'C': param_nid = NID_id_GostR3410_94_CryptoPro_C_ParamSet; break; case 'D': param_nid = NID_id_GostR3410_94_CryptoPro_D_ParamSet; break; default: return 0; break; } } else if ((strlen(value) == 2) && (toupper(value[0]) == 'X')) { switch (toupper(value[1])) { case 'A': param_nid = NID_id_GostR3410_94_CryptoPro_XchA_ParamSet; break; case 'B': param_nid = NID_id_GostR3410_94_CryptoPro_XchB_ParamSet; break; case 'C': param_nid = NID_id_GostR3410_94_CryptoPro_XchC_ParamSet; break; default: return 0; break; } } else { R3410_params *p = R3410_paramset; param_nid = OBJ_txt2nid(value); if (param_nid == NID_undef) { return 0; } for (;p->nid != NID_undef;p++) { if (p->nid == param_nid) break; } if (p->nid == NID_undef) { GOSTerr(GOST_F_PKEY_GOST_CTRL94_STR, GOST_R_INVALID_PARAMSET); return 0; } } return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET, param_nid, NULL); } return -2; } static int pkey_gost_ctrl01_str(EVP_PKEY_CTX *ctx, const char *type, const char *value) { int param_nid=0; if(!strcmp(type, param_ctrl_string)) { if (!value) { return 0; } if (strlen(value) == 1) { switch(toupper(value[0])) { case 'A': param_nid = NID_id_GostR3410_2001_CryptoPro_A_ParamSet; break; case 'B': param_nid = NID_id_GostR3410_2001_CryptoPro_B_ParamSet; break; case 'C': param_nid = NID_id_GostR3410_2001_CryptoPro_C_ParamSet; break; case '0': param_nid = NID_id_GostR3410_2001_TestParamSet; break; default: return 0; break; } } else if ((strlen(value) == 2) && (toupper(value[0]) == 'X')) { switch (toupper(value[1])) { case 'A': param_nid = NID_id_GostR3410_2001_CryptoPro_XchA_ParamSet; break; case 'B': param_nid = NID_id_GostR3410_2001_CryptoPro_XchB_ParamSet; break; default: return 0; break; } } else { R3410_2001_params *p = R3410_2001_paramset; param_nid = OBJ_txt2nid(value); if (param_nid == NID_undef) { return 0; } for (;p->nid != NID_undef;p++) { if (p->nid == param_nid) break; } if (p->nid == NID_undef) { GOSTerr(GOST_F_PKEY_GOST_CTRL01_STR, GOST_R_INVALID_PARAMSET); return 0; } } return pkey_gost_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET, param_nid, NULL); } return -2; } /* --------------------- key generation --------------------------------*/ /* Generates Gost_R3410_94_cp key */ static int pkey_gost94cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) { struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); DSA *dsa=NULL; if (data->sign_param_nid == NID_undef) { GOSTerr(GOST_F_PKEY_GOST94CP_KEYGEN, GOST_R_NO_PARAMETERS_SET); return 0; } dsa = DSA_new(); if (!fill_GOST94_params(dsa,data->sign_param_nid)) { DSA_free(dsa); return 0; } gost_sign_keygen(dsa); EVP_PKEY_assign(pkey,NID_id_GostR3410_94,dsa); return 1; } /* Generates GOST_R3410 2001 key and assigns it using specified type */ static int pkey_gost01cp_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) { struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); EC_KEY *ec=NULL; if (data->sign_param_nid == NID_undef) { GOSTerr(GOST_F_PKEY_GOST01CP_KEYGEN, GOST_R_NO_PARAMETERS_SET); return 0; } ec = EC_KEY_new(); if (!fill_GOST2001_params(ec,data->sign_param_nid)) { EC_KEY_free(ec); return 0; } gost2001_keygen(ec); EVP_PKEY_assign(pkey,NID_id_GostR3410_2001,ec); return 1; } /* ----------- sign callbacks --------------------------------------*/ static int pkey_gost94_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, const unsigned char *tbs, size_t tbs_len) { DSA_SIG *unpacked_sig=NULL; EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx); if (!siglen) return 0; if (!sig) { *siglen= 64; /* better to check size of pkey->pkey.dsa-q */ return 1; } unpacked_sig = gost_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey)); if (!unpacked_sig) { return 0; } return pack_sign_cp(unpacked_sig,32,sig,siglen); } static int pkey_gost01_cp_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, const unsigned char *tbs, size_t tbs_len) { DSA_SIG *unpacked_sig=NULL; EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx); if (!siglen) return 0; if (!sig) { *siglen= 64; /* better to check size of curve order*/ return 1; } unpacked_sig = gost2001_do_sign(tbs,tbs_len,EVP_PKEY_get0(pkey)); if (!unpacked_sig) { return 0; } return pack_sign_cp(unpacked_sig,32,sig,siglen); } /* ------------------- verify callbacks ---------------------------*/ static int pkey_gost94_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen, const unsigned char *tbs, size_t tbs_len) { int ok = 0; EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx); DSA_SIG *s=unpack_cp_signature(sig,siglen); if (!s) return 0; if (pub_key) ok = gost_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key)); DSA_SIG_free(s); return ok; } static int pkey_gost01_cp_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen, const unsigned char *tbs, size_t tbs_len) { int ok = 0; EVP_PKEY* pub_key = EVP_PKEY_CTX_get0_pkey(ctx); DSA_SIG *s=unpack_cp_signature(sig,siglen); if (!s) return 0; #ifdef DEBUG_SIGN fprintf(stderr,"R="); BN_print_fp(stderr,s->r); fprintf(stderr,"\nS="); BN_print_fp(stderr,s->s); fprintf(stderr,"\n"); #endif if (pub_key) ok = gost2001_do_verify(tbs,tbs_len,s,EVP_PKEY_get0(pub_key)); DSA_SIG_free(s); return ok; } /* ------------- encrypt init -------------------------------------*/ /* Generates ephermeral key */ static int pkey_gost_encrypt_init(EVP_PKEY_CTX *ctx) { return 1; } /* --------------- Derive init ------------------------------------*/ static int pkey_gost_derive_init(EVP_PKEY_CTX *ctx) { return 1; } /* -------- PKEY_METHOD for GOST MAC algorithm --------------------*/ static int pkey_gost_mac_init(EVP_PKEY_CTX *ctx) { struct gost_mac_pmeth_data *data; data = OPENSSL_malloc(sizeof(struct gost_mac_pmeth_data)); if (!data) return 0; memset(data,0,sizeof(struct gost_mac_pmeth_data)); EVP_PKEY_CTX_set_data(ctx,data); return 1; } static void pkey_gost_mac_cleanup (EVP_PKEY_CTX *ctx) { struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); OPENSSL_free(data); } static int pkey_gost_mac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) { struct gost_mac_pmeth_data *dst_data,*src_data; if (!pkey_gost_mac_init(dst)) { return 0; } src_data = EVP_PKEY_CTX_get_data(src); dst_data = EVP_PKEY_CTX_get_data(dst); *dst_data = *src_data; return 1; } static int pkey_gost_mac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) { struct gost_mac_pmeth_data *data = (struct gost_mac_pmeth_data*)EVP_PKEY_CTX_get_data(ctx); switch (type) { case EVP_PKEY_CTRL_MD: { if (EVP_MD_type((const EVP_MD *)p2) != NID_id_Gost28147_89_MAC) { GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_DIGEST_TYPE); return 0; } data->md = (EVP_MD *)p2; return 1; } break; case EVP_PKEY_CTRL_PKCS7_ENCRYPT: case EVP_PKEY_CTRL_PKCS7_DECRYPT: case EVP_PKEY_CTRL_PKCS7_SIGN: return 1; case EVP_PKEY_CTRL_SET_MAC_KEY: if (p1 != 32) { GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL, GOST_R_INVALID_MAC_KEY_LENGTH); return 0; } memcpy(data->key,p2,32); data->key_set = 1; return 1; case EVP_PKEY_CTRL_DIGESTINIT: { EVP_MD_CTX *mctx = p2; void *key; if (!data->key_set) { EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx); if (!pkey) { GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,GOST_R_MAC_KEY_NOT_SET); return 0; } key = EVP_PKEY_get0(pkey); if (!key) { GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL,GOST_R_MAC_KEY_NOT_SET); return 0; } } else { key = &(data->key); } return mctx->digest->md_ctrl(mctx,EVP_MD_CTRL_SET_KEY,32,key); } } return -2; } static int pkey_gost_mac_ctrl_str(EVP_PKEY_CTX *ctx, const char *type, const char *value) { if (!strcmp(type, key_ctrl_string)) { if (strlen(value)!=32) { GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR, GOST_R_INVALID_MAC_KEY_LENGTH); return 0; } return pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, 32,(char *)value); } if (!strcmp(type, hexkey_ctrl_string)) { long keylen; int ret; unsigned char *keybuf=string_to_hex(value,&keylen); if (keylen != 32) { GOSTerr(GOST_F_PKEY_GOST_MAC_CTRL_STR, GOST_R_INVALID_MAC_KEY_LENGTH); return 0; } ret= pkey_gost_mac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, 32,keybuf); OPENSSL_free(keybuf); return ret; } return -2; } static int pkey_gost_mac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) { struct gost_mac_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx); unsigned char *keydata; if (!data->key_set) { GOSTerr(GOST_F_PKEY_GOST_MAC_KEYGEN,GOST_R_MAC_KEY_NOT_SET); return 0; } keydata = OPENSSL_malloc(32); memcpy(keydata,data->key,32); EVP_PKEY_assign(pkey, NID_id_Gost28147_89_MAC, keydata); return 1; } static int pkey_gost_mac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx) { return 1; } static int pkey_gost_mac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, EVP_MD_CTX *mctx) { unsigned int tmpsiglen=*siglen; /* for platforms where sizeof(int)!=sizeof(size_t)*/ int ret; if (!sig) { *siglen = 4; return 1; } ret=EVP_DigestFinal_ex(mctx,sig,&tmpsiglen); *siglen = tmpsiglen; return ret; } /* ----------------------------------------------------------------*/ int register_pmeth_gost(int id, EVP_PKEY_METHOD **pmeth,int flags) { *pmeth = EVP_PKEY_meth_new(id, flags); if (!*pmeth) return 0; switch (id) { case NID_id_GostR3410_94: EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl94_str); EVP_PKEY_meth_set_keygen(*pmeth,NULL,pkey_gost94cp_keygen); EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost94_cp_sign); EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost94_cp_verify); EVP_PKEY_meth_set_encrypt(*pmeth, pkey_gost_encrypt_init, pkey_GOST94cp_encrypt); EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST94cp_decrypt); EVP_PKEY_meth_set_derive(*pmeth, pkey_gost_derive_init, pkey_gost94_derive); break; case NID_id_GostR3410_2001: EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_ctrl, pkey_gost_ctrl01_str); EVP_PKEY_meth_set_sign(*pmeth, NULL, pkey_gost01_cp_sign); EVP_PKEY_meth_set_verify(*pmeth, NULL, pkey_gost01_cp_verify); EVP_PKEY_meth_set_keygen(*pmeth, NULL, pkey_gost01cp_keygen); EVP_PKEY_meth_set_encrypt(*pmeth, pkey_gost_encrypt_init, pkey_GOST01cp_encrypt); EVP_PKEY_meth_set_decrypt(*pmeth, NULL, pkey_GOST01cp_decrypt); EVP_PKEY_meth_set_derive(*pmeth, pkey_gost_derive_init, pkey_gost2001_derive); break; case NID_id_Gost28147_89_MAC: EVP_PKEY_meth_set_ctrl(*pmeth,pkey_gost_mac_ctrl, pkey_gost_mac_ctrl_str); EVP_PKEY_meth_set_signctx(*pmeth,pkey_gost_mac_signctx_init, pkey_gost_mac_signctx); EVP_PKEY_meth_set_keygen(*pmeth,NULL, pkey_gost_mac_keygen); EVP_PKEY_meth_set_init(*pmeth,pkey_gost_mac_init); EVP_PKEY_meth_set_cleanup(*pmeth,pkey_gost_mac_cleanup); EVP_PKEY_meth_set_copy(*pmeth,pkey_gost_mac_copy); return 1; default: /*Unsupported method*/ return 0; } EVP_PKEY_meth_set_init(*pmeth, pkey_gost_init); EVP_PKEY_meth_set_cleanup(*pmeth, pkey_gost_cleanup); EVP_PKEY_meth_set_copy(*pmeth, pkey_gost_copy); /*FIXME derive etc...*/ return 1; }