#ifndef GOST_TOOLS_H #define GOST_TOOLS_H /********************************************************************** * gost_lcl.h * * Copyright (c) 2006 Cryptocom LTD * * This file is distributed under the same license as OpenSSL * * * * Internal declarations used in GOST engine * * OpenSSL 0.9.9 libraries required to compile and use * * this code * **********************************************************************/ #include #include #include #include #include #include #include #include "gost89.h" #include "gosthash.h" /* Control commands */ #define GOST_PARAM_CRYPT_PARAMS 0 #define GOST_PARAM_MAX 0 #define GOST_CTRL_CRYPT_PARAMS (ENGINE_CMD_BASE+GOST_PARAM_CRYPT_PARAMS) extern const ENGINE_CMD_DEFN gost_cmds[]; int gost_control_func(ENGINE *e,int cmd, long i, void *p, void (*f)(void)); const char *get_gost_engine_param(int param); int gost_set_default_param(int param, const char *value); void gost_param_free(void); /* method registration */ int register_ameth_gost (int nid, EVP_PKEY_ASN1_METHOD **ameth, const char* pemstr, const char* info); int register_pmeth_gost (int id, EVP_PKEY_METHOD **pmeth, int flags); /* Gost-specific pmeth control-function parameters */ /* For GOST R34.10 parameters */ #define param_ctrl_string "paramset" #define EVP_PKEY_CTRL_GOST_PARAMSET (EVP_PKEY_ALG_CTRL+1) /* For GOST 28147 MAC */ #define key_ctrl_string "key" #define hexkey_ctrl_string "hexkey" #define EVP_PKEY_CTRL_GOST_MAC_HEXKEY (EVP_PKEY_ALG_CTRL+3) /* Pmeth internal representation */ struct gost_pmeth_data { int sign_param_nid; /* Should be set whenever parameters are filled */ EVP_MD *md; unsigned char *shared_ukm; }; struct gost_mac_pmeth_data { int key_set; EVP_MD *md; unsigned char key[32]; } ; /* GOST-specific ASN1 structures */ typedef struct { ASN1_OCTET_STRING *encrypted_key; ASN1_OCTET_STRING *imit; } GOST_KEY_INFO; DECLARE_ASN1_FUNCTIONS(GOST_KEY_INFO) typedef struct { ASN1_OBJECT *cipher; X509_PUBKEY *ephem_key; ASN1_OCTET_STRING *eph_iv; } GOST_KEY_AGREEMENT_INFO; DECLARE_ASN1_FUNCTIONS(GOST_KEY_AGREEMENT_INFO) typedef struct { GOST_KEY_INFO *key_info; GOST_KEY_AGREEMENT_INFO *key_agreement_info; } GOST_KEY_TRANSPORT; DECLARE_ASN1_FUNCTIONS(GOST_KEY_TRANSPORT) typedef struct { /* FIXME incomplete */ GOST_KEY_TRANSPORT *gkt; } GOST_CLIENT_KEY_EXCHANGE_PARAMS; DECLARE_ASN1_FUNCTIONS(GOST_CLIENT_KEY_EXCHANGE_PARAMS) typedef struct { ASN1_OBJECT *key_params; ASN1_OBJECT *hash_params; ASN1_OBJECT *cipher_params; } GOST_KEY_PARAMS; DECLARE_ASN1_FUNCTIONS(GOST_KEY_PARAMS) typedef struct { ASN1_OCTET_STRING *iv; ASN1_OBJECT *enc_param_set; } GOST_CIPHER_PARAMS; DECLARE_ASN1_FUNCTIONS(GOST_CIPHER_PARAMS) /*============== Message digest and cipher related structures ==========*/ /* Structure used as EVP_MD_CTX-md_data. * It allows to avoid storing in the md-data pointers to * dynamically allocated memory. * * I cannot invent better way to avoid memory leaks, because * openssl insist on invoking Init on Final-ed digests, and there * is no reliable way to find out whether pointer in the passed * md_data is valid or not. * */ struct ossl_gost_digest_ctx { gost_hash_ctx dctx; gost_ctx cctx; }; /* EVP_MD structure for GOST R 34.11 */ extern EVP_MD digest_gost; /* EVP_MD structure for GOST 28147 in MAC mode */ extern EVP_MD imit_gost_cpa; /* Cipher context used for EVP_CIPHER operation */ struct ossl_gost_cipher_ctx { int paramNID; off_t count; int key_meshing; gost_ctx cctx; }; /* Structure to map parameter NID to S-block */ struct gost_cipher_info { int nid; gost_subst_block *sblock; int key_meshing; }; /* Context for MAC */ struct ossl_gost_imit_ctx { gost_ctx cctx; unsigned char buffer[8]; unsigned char partial_block[8]; off_t count; int key_meshing; int bytes_left; int key_set; }; /* Table which maps parameter NID to S-blocks */ extern struct gost_cipher_info gost_cipher_list[]; /* Find encryption params from ASN1_OBJECT */ const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj); /* Implementation of GOST 28147-89 cipher in CFB and CNT modes */ extern EVP_CIPHER cipher_gost; extern EVP_CIPHER cipher_gost_cpacnt; #define EVP_MD_CTRL_KEY_LEN (EVP_MD_CTRL_ALG_CTRL+3) #define EVP_MD_CTRL_SET_KEY (EVP_MD_CTRL_ALG_CTRL+4) /* EVP_PKEY_METHOD key encryption callbacks */ /* From gost94_keyx.c */ int pkey_GOST94cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len ); int pkey_GOST94cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* in, size_t in_len ); /* From gost2001_keyx.c */ int pkey_GOST01cp_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* key, size_t key_len ); int pkey_GOST01cp_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, const unsigned char* in, size_t in_len ); /* derive functions */ /* From gost2001_keyx.c */ int pkey_gost2001_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen); /* From gost94_keyx.c */ int pkey_gost94_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen); /* Internal functions for signature algorithms */ int fill_GOST94_params(DSA *dsa,int nid); int fill_GOST2001_params(EC_KEY *eckey, int nid); int gost_sign_keygen(DSA *dsa) ; int gost2001_keygen(EC_KEY *ec) ; DSA_SIG *gost_do_sign(const unsigned char *dgst,int dlen, DSA *dsa) ; DSA_SIG *gost2001_do_sign(const unsigned char *dgst,int dlen, EC_KEY *eckey); int gost_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig, DSA *dsa) ; int gost2001_do_verify(const unsigned char *dgst,int dgst_len, DSA_SIG *sig, EC_KEY *ec); int gost2001_compute_public(EC_KEY *ec) ; int gost94_compute_public(DSA *dsa) ; /*============== miscellaneous functions============================= */ /* from gost_sign.c */ /* Convert GOST R 34.11 hash sum to bignum according to standard */ BIGNUM *hashsum2bn(const unsigned char *dgst) ; /* Store bignum in byte array of given length, prepending by zeros * if nesseccary */ int store_bignum(BIGNUM *bn, unsigned char *buf,int len); /* Read bignum, which can have few MSB all-zeros from buffer*/ BIGNUM *getbnfrombuf(const unsigned char *buf,size_t len); /* Pack GOST R 34.10 signature according to CryptoPro rules */ int pack_sign_cp(DSA_SIG *s,int order,unsigned char *sig, size_t *siglen); /* Unpack GOST R 34.10 signature according to CryptoPro rules */ DSA_SIG *unpack_cp_signature(const unsigned char *sig,size_t siglen) ; /* from ameth.c */ /* Get private key as BIGNUM from both R 34.10-94 and R 34.10-2001 keys*/ /* Returns pointer into EVP_PKEY structure */ BIGNUM* gost_get0_priv_key(const EVP_PKEY *pkey) ; /* Find NID by GOST 94 parameters */ int gost94_nid_by_params(DSA *p) ; #endif