1653 lines
51 KiB
C
1653 lines
51 KiB
C
/**********************************************************************
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* gost_crypt.c - Initialize all ciphers *
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* *
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* Copyright (c) 2005-2006 Cryptocom LTD *
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* Copyright (c) 2020 Chikunov Vitaly <vt@altlinux.org> *
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* This file is distributed under the same license as OpenSSL *
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* *
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* OpenSSL interface to GOST 28147-89 cipher functions *
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* Requires OpenSSL 0.9.9 for compilation *
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**********************************************************************/
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#include <string.h>
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#include "gost89.h"
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#include <openssl/err.h>
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#include <openssl/rand.h>
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#include "e_gost_err.h"
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#include "gost_lcl.h"
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#include "gost_gost2015.h"
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#if !defined(CCGOST_DEBUG) && !defined(DEBUG)
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# ifndef NDEBUG
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# define NDEBUG
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# endif
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#endif
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#include <assert.h>
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static int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
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const unsigned char *key,
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const unsigned char *iv, int enc);
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/* Handles block of data in CFB mode */
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static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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/* Handles block of data in CBC mode */
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static int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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/* Handles block of data in CNT mode */
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static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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/* Cleanup function */
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static int gost_cipher_cleanup(EVP_CIPHER_CTX *);
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static int gost_magma_mgm_cleanup(EVP_CIPHER_CTX *c);
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/* set/get cipher parameters */
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static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
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static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
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/* Control function */
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static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
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static int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int gost_magma_cipher_init_mgm(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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/* Handles block of data in CBC mode */
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static int magma_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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static int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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static int gost_magma_cipher_do_mgm(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t len);
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/* set/get cipher parameters */
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static int magma_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
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static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
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/* Control function */
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static int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
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static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
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static int gost_magma_mgm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
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/*
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* Single level template accessor.
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* Note: that you cannot template 0 value.
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*/
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#define TPL(st,field) ( \
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((st)->field) ? ((st)->field) : TPL_VAL(st,field) \
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)
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#define TPL_VAL(st,field) ( \
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((st)->template ? (st)->template->field : 0) \
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)
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EVP_CIPHER *GOST_init_cipher(GOST_cipher *c)
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{
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if (c->cipher)
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return c->cipher;
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/* Some sanity checking. */
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int flags = c->flags | TPL_VAL(c, flags);
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int block_size = TPL(c, block_size);
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switch (flags & EVP_CIPH_MODE) {
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case EVP_CIPH_CBC_MODE:
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case EVP_CIPH_ECB_MODE:
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case EVP_CIPH_WRAP_MODE:
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OPENSSL_assert(block_size != 1);
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OPENSSL_assert(!(flags & EVP_CIPH_NO_PADDING));
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break;
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default:
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OPENSSL_assert(block_size == 1);
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OPENSSL_assert(flags & EVP_CIPH_NO_PADDING);
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}
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if (TPL(c, iv_len))
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OPENSSL_assert(flags & EVP_CIPH_CUSTOM_IV);
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else
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OPENSSL_assert(!(flags & EVP_CIPH_CUSTOM_IV));
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EVP_CIPHER *cipher;
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if (!(cipher = EVP_CIPHER_meth_new(c->nid, block_size, TPL(c, key_len)))
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|| !EVP_CIPHER_meth_set_iv_length(cipher, TPL(c, iv_len))
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|| !EVP_CIPHER_meth_set_flags(cipher, flags)
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|| !EVP_CIPHER_meth_set_init(cipher, TPL(c, init))
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|| !EVP_CIPHER_meth_set_do_cipher(cipher, TPL(c, do_cipher))
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|| !EVP_CIPHER_meth_set_cleanup(cipher, TPL(c, cleanup))
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|| !EVP_CIPHER_meth_set_impl_ctx_size(cipher, TPL(c, ctx_size))
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|| !EVP_CIPHER_meth_set_set_asn1_params(cipher, TPL(c, set_asn1_parameters))
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|| !EVP_CIPHER_meth_set_get_asn1_params(cipher, TPL(c, get_asn1_parameters))
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|| !EVP_CIPHER_meth_set_ctrl(cipher, TPL(c, ctrl))) {
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EVP_CIPHER_meth_free(cipher);
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cipher = NULL;
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}
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c->cipher = cipher;
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return c->cipher;
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}
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void GOST_deinit_cipher(GOST_cipher *c)
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{
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if (c->cipher) {
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EVP_CIPHER_meth_free(c->cipher);
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c->cipher = NULL;
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}
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}
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static GOST_cipher gost_template_cipher = {
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.block_size = 8,
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.key_len = 32,
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.iv_len = 8,
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.flags = EVP_CIPH_CUSTOM_IV |
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EVP_CIPH_RAND_KEY |
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EVP_CIPH_ALWAYS_CALL_INIT,
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.cleanup = gost_cipher_cleanup,
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.ctx_size = sizeof(struct ossl_gost_cipher_ctx),
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.set_asn1_parameters = gost89_set_asn1_parameters,
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.get_asn1_parameters = gost89_get_asn1_parameters,
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.ctrl = gost_cipher_ctl,
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};
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GOST_cipher Gost28147_89_cipher = {
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.nid = NID_id_Gost28147_89,
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.template = &gost_template_cipher,
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.block_size = 1,
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.flags = EVP_CIPH_CFB_MODE |
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EVP_CIPH_NO_PADDING,
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.init = gost_cipher_init,
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.do_cipher = gost_cipher_do_cfb,
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};
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GOST_cipher Gost28147_89_cbc_cipher = {
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.nid = NID_gost89_cbc,
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.template = &gost_template_cipher,
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.flags = EVP_CIPH_CBC_MODE,
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.init = gost_cipher_init_cbc,
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.do_cipher = gost_cipher_do_cbc,
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};
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GOST_cipher Gost28147_89_cnt_cipher = {
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.nid = NID_gost89_cnt,
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.template = &gost_template_cipher,
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.block_size = 1,
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.flags = EVP_CIPH_OFB_MODE |
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EVP_CIPH_NO_PADDING,
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.init = gost_cipher_init_cpa,
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.do_cipher = gost_cipher_do_cnt,
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};
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GOST_cipher Gost28147_89_cnt_12_cipher = {
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.nid = NID_gost89_cnt_12,
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.template = &gost_template_cipher,
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.block_size = 1,
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.flags = EVP_CIPH_OFB_MODE |
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EVP_CIPH_NO_PADDING,
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.init = gost_cipher_init_cp_12,
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.do_cipher = gost_cipher_do_cnt,
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};
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static GOST_cipher magma_template_cipher = {
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.block_size = 8,
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.key_len = 32,
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.flags =
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EVP_CIPH_RAND_KEY |
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EVP_CIPH_ALWAYS_CALL_INIT,
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.cleanup = gost_cipher_cleanup,
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.ctx_size = sizeof(struct ossl_gost_cipher_ctx),
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.set_asn1_parameters = magma_set_asn1_parameters,
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.get_asn1_parameters = magma_get_asn1_parameters,
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.do_cipher = magma_cipher_do_ctr,
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.ctrl = magma_cipher_ctl,
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};
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GOST_cipher magma_ctr_cipher = {
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.nid = NID_magma_ctr,
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.template = &magma_template_cipher,
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.block_size = 1,
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.iv_len = 4,
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.flags = EVP_CIPH_CTR_MODE |
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EVP_CIPH_CUSTOM_IV |
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EVP_CIPH_NO_PADDING,
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.init = magma_cipher_init,
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};
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GOST_cipher magma_ctr_acpkm_cipher = {
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.nid = NID_magma_ctr_acpkm,
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.template = &magma_template_cipher,
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.block_size = 1,
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.iv_len = 4,
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.flags = EVP_CIPH_CTR_MODE |
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EVP_CIPH_CUSTOM_IV |
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EVP_CIPH_NO_PADDING,
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.init = magma_cipher_init,
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};
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GOST_cipher magma_ctr_acpkm_omac_cipher = {
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.nid = NID_magma_ctr_acpkm_omac,
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.template = &magma_template_cipher,
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.block_size = 1,
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.iv_len = 4,
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.flags = EVP_CIPH_CTR_MODE |
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EVP_CIPH_CUSTOM_IV |
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EVP_CIPH_NO_PADDING |
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EVP_CIPH_CUSTOM_COPY |
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EVP_CIPH_FLAG_CUSTOM_CIPHER |
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EVP_CIPH_FLAG_CIPHER_WITH_MAC,
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.init = magma_cipher_init_ctr_acpkm_omac,
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.do_cipher = magma_cipher_do_ctr_acpkm_omac,
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.ctrl = magma_cipher_ctl_acpkm_omac,
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};
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GOST_cipher magma_ecb_cipher = {
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.nid = NID_magma_ecb,
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.template = &magma_template_cipher,
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.flags = EVP_CIPH_ECB_MODE,
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.init = magma_cipher_init,
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.do_cipher = magma_cipher_do_ecb,
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};
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GOST_cipher magma_mgm_cipher = {
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.nid = NID_undef,
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.template = &magma_template_cipher,
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.block_size = 1,
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.iv_len = 8,
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.flags = EVP_CIPH_NO_PADDING |
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EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER |
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EVP_CIPH_CTRL_INIT | EVP_CIPH_FLAG_AEAD_CIPHER,
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.init = gost_magma_cipher_init_mgm,
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.do_cipher = gost_magma_cipher_do_mgm,
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.ctrl = gost_magma_mgm_ctrl,
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.cleanup = gost_magma_mgm_cleanup,
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.ctx_size = sizeof(gost_mgm_ctx)
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};
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static void magma_NID_callback (int nid)
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{
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magma_mgm_cipher.nid = nid;
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}
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GOST_NID_JOB magma_mgm_NID = {
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.sn = SN_magma_mgm,
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.ln = SN_magma_mgm,
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.callback = magma_NID_callback,
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};
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GOST_cipher magma_cbc_cipher = {
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.nid = NID_magma_cbc,
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.template = &gost_template_cipher,
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.iv_len = 8,
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.flags = EVP_CIPH_CBC_MODE |
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EVP_CIPH_CUSTOM_IV,
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.init = magma_cipher_init,
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.do_cipher = magma_cipher_do_cbc,
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};
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/* Implementation of GOST 28147-89 in MAC (imitovstavka) mode */
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/* Init functions which set specific parameters */
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static int gost_imit_init_cpa(EVP_MD_CTX *ctx);
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static int gost_imit_init_cp_12(EVP_MD_CTX *ctx);
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/* process block of data */
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static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count);
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/* Return computed value */
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static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md);
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/* Copies context */
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static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from);
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static int gost_imit_cleanup(EVP_MD_CTX *ctx);
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/* Control function, knows how to set MAC key.*/
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static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr);
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GOST_digest Gost28147_89_MAC_digest = {
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.nid = NID_id_Gost28147_89_MAC,
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.result_size = 4,
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.input_blocksize = 8,
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.app_datasize = sizeof(struct ossl_gost_imit_ctx),
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.flags = EVP_MD_FLAG_XOF,
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.init = gost_imit_init_cpa,
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.update = gost_imit_update,
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.final = gost_imit_final,
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.copy = gost_imit_copy,
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.cleanup = gost_imit_cleanup,
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.ctrl = gost_imit_ctrl,
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};
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GOST_digest Gost28147_89_mac_12_digest = {
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.nid = NID_gost_mac_12,
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.result_size = 4,
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.input_blocksize = 8,
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.app_datasize = sizeof(struct ossl_gost_imit_ctx),
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.flags = EVP_MD_FLAG_XOF,
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.init = gost_imit_init_cp_12,
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.update = gost_imit_update,
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.final = gost_imit_final,
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.copy = gost_imit_copy,
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.cleanup = gost_imit_cleanup,
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.ctrl = gost_imit_ctrl,
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};
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/*
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* Correspondence between gost parameter OIDs and substitution blocks
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* NID field is filed by register_gost_NID function in engine.c
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* upon engine initialization
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*/
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static struct gost_cipher_info gost_cipher_list[] = {
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/*- NID *//*
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* Subst block
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*//*
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* Key meshing
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*/
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/*
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* {NID_id_GostR3411_94_CryptoProParamSet,&GostR3411_94_CryptoProParamSet,0},
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*/
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{NID_id_Gost28147_89_CryptoPro_A_ParamSet, &Gost28147_CryptoProParamSetA,
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1},
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{NID_id_Gost28147_89_CryptoPro_B_ParamSet, &Gost28147_CryptoProParamSetB,
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1},
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{NID_id_Gost28147_89_CryptoPro_C_ParamSet, &Gost28147_CryptoProParamSetC,
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1},
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{NID_id_Gost28147_89_CryptoPro_D_ParamSet, &Gost28147_CryptoProParamSetD,
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1},
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{NID_id_tc26_gost_28147_param_Z, &Gost28147_TC26ParamSetZ, 1},
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{NID_id_Gost28147_89_TestParamSet, &Gost28147_TestParamSet, 1},
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{NID_undef, NULL, 0}
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};
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/*
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* get encryption parameters from crypto network settings FIXME For now we
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* use environment var CRYPT_PARAMS as place to store these settings.
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* Actually, it is better to use engine control command, read from
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* configuration file to set them
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*/
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const struct gost_cipher_info *get_encryption_params(ASN1_OBJECT *obj)
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{
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int nid;
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struct gost_cipher_info *param;
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if (!obj) {
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const char *params = get_gost_engine_param(GOST_PARAM_CRYPT_PARAMS);
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if (!params || !strlen(params)) {
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int i;
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for (i = 0; gost_cipher_list[i].nid != NID_undef; i++)
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if (gost_cipher_list[i].nid == NID_id_tc26_gost_28147_param_Z)
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return &gost_cipher_list[i];
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return &gost_cipher_list[0];
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}
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nid = OBJ_txt2nid(params);
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if (nid == NID_undef) {
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GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS,
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GOST_R_INVALID_CIPHER_PARAM_OID);
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ERR_add_error_data(3, "Unsupported CRYPT_PARAMS='",
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params, "' specified in environment or in config");
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return NULL;
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}
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} else {
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nid = OBJ_obj2nid(obj);
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}
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for (param = gost_cipher_list; param->sblock != NULL && param->nid != nid;
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param++) ;
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if (!param->sblock) {
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GOSTerr(GOST_F_GET_ENCRYPTION_PARAMS, GOST_R_INVALID_CIPHER_PARAMS);
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return NULL;
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}
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return param;
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}
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|
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/* Sets cipher param from paramset NID. */
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static int gost_cipher_set_param(struct ossl_gost_cipher_ctx *c, int nid)
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{
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const struct gost_cipher_info *param;
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param = get_encryption_params((nid == NID_undef ? NULL : OBJ_nid2obj(nid)));
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if (!param)
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return 0;
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c->paramNID = param->nid;
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c->key_meshing = param->key_meshing;
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c->count = 0;
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gost_init(&(c->cctx), param->sblock);
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return 1;
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}
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|
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/* Initializes EVP_CIPHER_CTX by paramset NID */
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static int gost_cipher_init_param(EVP_CIPHER_CTX *ctx,
|
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const unsigned char *key,
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const unsigned char *iv, int enc,
|
|
int paramNID, int mode)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
|
|
if (!gost_cipher_set_param(c, paramNID))
|
|
return 0;
|
|
EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
|
|
}
|
|
if (key)
|
|
gost_key(&(c->cctx), key);
|
|
if (iv) {
|
|
memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
|
|
EVP_CIPHER_CTX_iv_length(ctx));
|
|
}
|
|
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
|
|
EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
|
|
return 1;
|
|
}
|
|
|
|
static int gost_cipher_init_cnt(EVP_CIPHER_CTX *ctx,
|
|
const unsigned char *key,
|
|
const unsigned char *iv,
|
|
gost_subst_block * block)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
gost_init(&(c->cctx), block);
|
|
c->key_meshing = 1;
|
|
c->count = 0;
|
|
if (key)
|
|
gost_key(&(c->cctx), key);
|
|
if (iv) {
|
|
memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
|
|
EVP_CIPHER_CTX_iv_length(ctx));
|
|
}
|
|
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
|
|
EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
|
|
return 1;
|
|
}
|
|
|
|
static int gost_cipher_init_cpa(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_CryptoProParamSetA);
|
|
}
|
|
|
|
static int gost_cipher_init_cp_12(EVP_CIPHER_CTX *ctx,
|
|
const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
return gost_cipher_init_cnt(ctx, key, iv, &Gost28147_TC26ParamSetZ);
|
|
}
|
|
|
|
/* Initializes EVP_CIPHER_CTX with default values */
|
|
static int gost_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
|
|
EVP_CIPH_CFB_MODE);
|
|
}
|
|
|
|
/* Initializes EVP_CIPHER_CTX with default values */
|
|
static int gost_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
return gost_cipher_init_param(ctx, key, iv, enc, NID_undef,
|
|
EVP_CIPH_CBC_MODE);
|
|
}
|
|
|
|
/* Initializes EVP_CIPHER_CTX with default values */
|
|
static int magma_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
/* FIXME this is just initializtion check */
|
|
if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
|
|
if (!gost_cipher_set_param(c, NID_id_tc26_gost_28147_param_Z))
|
|
return 0;
|
|
EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
|
|
|
|
if (enc) {
|
|
if (init_zero_kdf_seed(c->kdf_seed) == 0)
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (key) {
|
|
magma_key(&(c->cctx), key);
|
|
magma_master_key(&(c->cctx), key);
|
|
}
|
|
if (iv) {
|
|
memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
|
|
EVP_CIPHER_CTX_iv_length(ctx));
|
|
}
|
|
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
|
|
EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
|
|
|
|
if (EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm
|
|
|| EVP_CIPHER_CTX_nid(ctx) == NID_magma_ctr_acpkm_omac) {
|
|
c->key_meshing = 1024;
|
|
} else {
|
|
c->key_meshing = 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Initializes EVP_CIPHER_CTX with default values */
|
|
static int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
if (key) {
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
unsigned char cipher_key[32];
|
|
c->omac_ctx = EVP_MD_CTX_new();
|
|
|
|
if (c->omac_ctx == NULL) {
|
|
GOSTerr(GOST_F_MAGMA_CIPHER_INIT_CTR_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
|
|
if (gost2015_acpkm_omac_init(NID_magma_mac, enc, key,
|
|
c->omac_ctx, cipher_key, c->kdf_seed) != 1) {
|
|
EVP_MD_CTX_free(c->omac_ctx);
|
|
c->omac_ctx = NULL;
|
|
return 0;
|
|
}
|
|
|
|
return magma_cipher_init(ctx, cipher_key, iv, enc);
|
|
}
|
|
|
|
return magma_cipher_init(ctx, key, iv, enc);
|
|
}
|
|
|
|
void gost_magma_encrypt_wrap(unsigned char *in, unsigned char *out,
|
|
struct ossl_gost_cipher_ctx *c) {
|
|
int i;
|
|
unsigned char b[8];
|
|
unsigned char d[8];
|
|
for (i = 0; i < 8; i++) {
|
|
b[7 - i] = in[i];
|
|
}
|
|
gostcrypt(&(c->cctx), b, d);
|
|
for (i = 0; i < 8; i++) {
|
|
out[7 - i] = d[i];
|
|
}
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------------------------------- */
|
|
/*! Функция реализует операцию умножения двух элементов конечного поля \f$ \mathbb F_{2^{64}}\f$,
|
|
порожденного неприводимым многочленом
|
|
\f$ f(x) = x^{64} + x^4 + x^3 + x + 1 \in \mathbb F_2[x]\f$. Для умножения используется
|
|
простейшая реализация, основанная на приведении по модулю после каждого шага алгоритма. */
|
|
/* ----------------------------------------------------------------------------------------------- */
|
|
static void gf64_mul (uint64_t *result, uint64_t *arg1, uint64_t *arg2)
|
|
{
|
|
int i = 0;
|
|
register uint64_t t, X0;
|
|
uint64_t Z0 = 0;
|
|
|
|
#ifdef L_ENDIAN
|
|
X0 = BSWAP64(*arg1);
|
|
#else
|
|
X0 = *arg1;
|
|
#endif
|
|
|
|
#ifdef L_ENDIAN
|
|
t = BSWAP64(*(arg2));
|
|
#else
|
|
t = *(arg2);
|
|
#endif
|
|
|
|
for (i = 0; i < 63; i++) {
|
|
if (t & 0x1) {
|
|
Z0 ^= X0;
|
|
}
|
|
t >>= 1;
|
|
if (X0 & 0x8000000000000000) {
|
|
X0 <<= 1;
|
|
X0 ^= 0x1b;
|
|
}
|
|
else {
|
|
X0 <<= 1;
|
|
}
|
|
}
|
|
|
|
if (t & 0x1) {
|
|
Z0 ^= X0;
|
|
}
|
|
|
|
#ifdef L_ENDIAN
|
|
*(result) = BSWAP64(Z0);
|
|
#else
|
|
*(result) = Z0;
|
|
#endif
|
|
}
|
|
|
|
static int gost_magma_cipher_init_mgm(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
gost_mgm_ctx *mctx =
|
|
(gost_mgm_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
int bl;
|
|
|
|
if (!iv && !key)
|
|
return 1;
|
|
if (key) {
|
|
bl = EVP_CIPHER_CTX_iv_length(ctx);
|
|
if (!gost_cipher_set_param(&mctx->ks.g_ks, NID_id_tc26_gost_28147_param_Z))
|
|
return 0;
|
|
magma_key(&(mctx->ks.g_ks.cctx), key);
|
|
gost_mgm128_init(&mctx->mgm, &mctx->ks,
|
|
(block128_f) gost_magma_encrypt_wrap, gf64_mul, bl);
|
|
|
|
/*
|
|
* If we have an iv can set it directly, otherwise use saved IV.
|
|
*/
|
|
if (iv == NULL && mctx->iv_set)
|
|
iv = mctx->iv;
|
|
if (iv) {
|
|
if (gost_mgm128_setiv(&mctx->mgm, iv, mctx->ivlen) != 1)
|
|
return 0;
|
|
mctx->iv_set = 1;
|
|
}
|
|
mctx->key_set = 1;
|
|
} else {
|
|
/* If key set use IV, otherwise copy */
|
|
if (mctx->key_set) {
|
|
if (gost_mgm128_setiv(&mctx->mgm, iv, mctx->ivlen) != 1)
|
|
return 0;
|
|
}
|
|
else
|
|
memcpy(mctx->iv, iv, mctx->ivlen);
|
|
mctx->iv_set = 1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Wrapper around gostcrypt function from gost89.c which perform key meshing
|
|
* when nesseccary
|
|
*/
|
|
static void gost_crypt_mesh(void *ctx, unsigned char *iv, unsigned char *buf)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = ctx;
|
|
assert(c->count % 8 == 0 && c->count <= 1024);
|
|
if (c->key_meshing && c->count == 1024) {
|
|
cryptopro_key_meshing(&(c->cctx), iv);
|
|
}
|
|
gostcrypt(&(c->cctx), iv, buf);
|
|
c->count = c->count % 1024 + 8;
|
|
}
|
|
|
|
static void gost_cnt_next(void *ctx, unsigned char *iv, unsigned char *buf)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = ctx;
|
|
word32 g, go;
|
|
unsigned char buf1[8];
|
|
assert(c->count % 8 == 0 && c->count <= 1024);
|
|
if (c->key_meshing && c->count == 1024) {
|
|
cryptopro_key_meshing(&(c->cctx), iv);
|
|
}
|
|
if (c->count == 0) {
|
|
gostcrypt(&(c->cctx), iv, buf1);
|
|
} else {
|
|
memcpy(buf1, iv, 8);
|
|
}
|
|
g = buf1[0] | (buf1[1] << 8) | (buf1[2] << 16) | ((word32) buf1[3] << 24);
|
|
g += 0x01010101;
|
|
buf1[0] = (unsigned char)(g & 0xff);
|
|
buf1[1] = (unsigned char)((g >> 8) & 0xff);
|
|
buf1[2] = (unsigned char)((g >> 16) & 0xff);
|
|
buf1[3] = (unsigned char)((g >> 24) & 0xff);
|
|
g = buf1[4] | (buf1[5] << 8) | (buf1[6] << 16) | ((word32) buf1[7] << 24);
|
|
go = g;
|
|
g += 0x01010104;
|
|
if (go > g) /* overflow */
|
|
g++;
|
|
buf1[4] = (unsigned char)(g & 0xff);
|
|
buf1[5] = (unsigned char)((g >> 8) & 0xff);
|
|
buf1[6] = (unsigned char)((g >> 16) & 0xff);
|
|
buf1[7] = (unsigned char)((g >> 24) & 0xff);
|
|
memcpy(iv, buf1, 8);
|
|
gostcrypt(&(c->cctx), buf1, buf);
|
|
c->count = c->count % 1024 + 8;
|
|
}
|
|
|
|
/* GOST encryption in CBC mode */
|
|
static int gost_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
unsigned char b[8];
|
|
const unsigned char *in_ptr = in;
|
|
unsigned char *out_ptr = out;
|
|
int i;
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
|
|
if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
|
while (inl > 0) {
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
b[i] = iv[i] ^ in_ptr[i];
|
|
}
|
|
gostcrypt(&(c->cctx), b, out_ptr);
|
|
memcpy(iv, out_ptr, 8);
|
|
out_ptr += 8;
|
|
in_ptr += 8;
|
|
inl -= 8;
|
|
}
|
|
} else {
|
|
while (inl > 0) {
|
|
unsigned char tmpiv[8];
|
|
gostdecrypt(&(c->cctx), in_ptr, b);
|
|
memcpy(tmpiv, in_ptr, 8);
|
|
for (i = 0; i < 8; i++) {
|
|
out_ptr[i] = iv[i] ^ b[i];
|
|
}
|
|
memcpy(iv, tmpiv, 8);
|
|
out_ptr += 8;
|
|
in_ptr += 8;
|
|
inl -= 8;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* MAGMA encryption in ECB mode */
|
|
static int magma_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
|
while (inl > 0) {
|
|
magmacrypt(&(c->cctx), in, out);
|
|
out += 8;
|
|
in += 8;
|
|
inl -= 8;
|
|
}
|
|
} else {
|
|
while (inl > 0) {
|
|
magmadecrypt(&(c->cctx), in, out);
|
|
out += 8;
|
|
in += 8;
|
|
inl -= 8;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* MAGMA encryption in CBC mode */
|
|
static int magma_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
unsigned char b[8];
|
|
unsigned char d[8];
|
|
const unsigned char *in_ptr = in;
|
|
unsigned char *out_ptr = out;
|
|
int i;
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
|
|
if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
|
while (inl > 0) {
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
out_ptr[i] = iv[i] ^ in_ptr[i];
|
|
}
|
|
magmacrypt(&(c->cctx), out_ptr, out_ptr);
|
|
memcpy(iv, out_ptr, 8);
|
|
out_ptr += 8;
|
|
in_ptr += 8;
|
|
inl -= 8;
|
|
}
|
|
} else {
|
|
while (inl > 0) {
|
|
magmadecrypt(&(c->cctx), in_ptr, b);
|
|
memcpy(d, in_ptr, 8);
|
|
for (i = 0; i < 8; i++) {
|
|
out_ptr[i] = iv[i] ^ b[i];
|
|
}
|
|
memcpy(iv, d, 8);
|
|
out_ptr += 8;
|
|
in_ptr += 8;
|
|
inl -= 8;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* increment counter (64-bit int) by 1 */
|
|
static void ctr64_inc(unsigned char *counter)
|
|
{
|
|
inc_counter(counter, 8);
|
|
}
|
|
|
|
#define MAGMA_BLOCK_SIZE 8
|
|
#define MAGMA_BLOCK_MASK (MAGMA_BLOCK_SIZE - 1)
|
|
static inline void apply_acpkm_magma(struct ossl_gost_cipher_ctx *
|
|
ctx, unsigned int *num)
|
|
{
|
|
if (!ctx->key_meshing || (*num < (unsigned int)ctx->key_meshing))
|
|
return;
|
|
acpkm_magma_key_meshing(&ctx->cctx);
|
|
*num &= MAGMA_BLOCK_MASK;
|
|
}
|
|
|
|
/* MAGMA encryption in CTR mode */
|
|
static int magma_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
const unsigned char *in_ptr = in;
|
|
unsigned char *out_ptr = out;
|
|
size_t j;
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
|
|
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
|
|
unsigned int num = EVP_CIPHER_CTX_num(ctx);
|
|
size_t blocks, i, lasted = inl;
|
|
/* Process partial blocks */
|
|
while ((num & MAGMA_BLOCK_MASK) && lasted) {
|
|
*out_ptr++ = *in_ptr++ ^ buf[num & MAGMA_BLOCK_MASK];
|
|
--lasted;
|
|
num++;
|
|
}
|
|
blocks = lasted / MAGMA_BLOCK_SIZE;
|
|
|
|
/* Process full blocks */
|
|
for (i = 0; i < blocks; i++) {
|
|
apply_acpkm_magma(c, &num);
|
|
magmacrypt(&(c->cctx), iv, buf);
|
|
for (j = 0; j < 8; j++) {
|
|
out_ptr[j] = buf[j] ^ in_ptr[j];
|
|
}
|
|
ctr64_inc(iv);
|
|
c->count += MAGMA_BLOCK_SIZE;
|
|
in_ptr += MAGMA_BLOCK_SIZE;
|
|
out_ptr += MAGMA_BLOCK_SIZE;
|
|
num += MAGMA_BLOCK_SIZE;
|
|
lasted -= MAGMA_BLOCK_SIZE;
|
|
}
|
|
|
|
/* Process the rest of plaintext */
|
|
if (lasted > 0) {
|
|
apply_acpkm_magma(c, &num);
|
|
magmacrypt(&(c->cctx), iv, buf);
|
|
|
|
for (i = 0; i < lasted; i++)
|
|
out_ptr[i] = buf[i] ^ in_ptr[i];
|
|
ctr64_inc(iv);
|
|
c->count += 8;
|
|
num += lasted;
|
|
}
|
|
EVP_CIPHER_CTX_set_num(ctx, num);
|
|
|
|
return inl;
|
|
}
|
|
|
|
/* MAGMA encryption in CTR mode */
|
|
static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
if (in == NULL && inl == 0) /* Final call */
|
|
return gost2015_final_call(ctx, c->omac_ctx, MAGMA_MAC_MAX_SIZE, c->tag, magma_cipher_do_ctr);
|
|
|
|
if (in == NULL)
|
|
return -1;
|
|
|
|
/* As in and out can be the same pointer, process unencrypted here */
|
|
if (EVP_CIPHER_CTX_encrypting(ctx))
|
|
EVP_DigestSignUpdate(c->omac_ctx, in, inl);
|
|
|
|
if (magma_cipher_do_ctr(ctx, out, in, inl) != inl)
|
|
return -1;
|
|
|
|
/* As in and out can be the same pointer, process decrypted here */
|
|
if (!EVP_CIPHER_CTX_encrypting(ctx))
|
|
EVP_DigestSignUpdate(c->omac_ctx, out, inl);
|
|
|
|
return inl;
|
|
}
|
|
|
|
static int gost_magma_cipher_do_mgm(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t len)
|
|
{
|
|
gost_mgm_ctx *mctx =
|
|
(gost_mgm_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
int enc = EVP_CIPHER_CTX_encrypting(ctx);
|
|
|
|
/* If not set up, return error */
|
|
if (!mctx->key_set) {
|
|
GOSTerr(GOST_F_GOST_MAGMA_CIPHER_DO_MGM,
|
|
GOST_R_BAD_ORDER);
|
|
return -1;
|
|
}
|
|
|
|
if (!mctx->iv_set) {
|
|
GOSTerr(GOST_F_GOST_MAGMA_CIPHER_DO_MGM,
|
|
GOST_R_BAD_ORDER);
|
|
return -1;
|
|
}
|
|
if (in) {
|
|
if (out == NULL) {
|
|
if (gost_mgm128_aad(&mctx->mgm, in, len))
|
|
return -1;
|
|
} else if (enc) {
|
|
if (gost_mgm128_encrypt(&mctx->mgm, in, out, len))
|
|
return -1;
|
|
} else {
|
|
if (gost_mgm128_decrypt(&mctx->mgm, in, out, len))
|
|
return -1;
|
|
}
|
|
return len;
|
|
} else {
|
|
if (!enc) {
|
|
if (mctx->taglen < 0)
|
|
return -1;
|
|
if (gost_mgm128_finish(&mctx->mgm,
|
|
EVP_CIPHER_CTX_buf_noconst(ctx),
|
|
mctx->taglen) != 0)
|
|
return -1;
|
|
mctx->iv_set = 0;
|
|
return 0;
|
|
}
|
|
gost_mgm128_tag(&mctx->mgm, EVP_CIPHER_CTX_buf_noconst(ctx), 8);
|
|
mctx->taglen = 8;
|
|
/* Don't reuse the IV */
|
|
mctx->iv_set = 0;
|
|
return 0;
|
|
}
|
|
|
|
}
|
|
|
|
/* GOST encryption in CFB mode */
|
|
static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
const unsigned char *in_ptr = in;
|
|
unsigned char *out_ptr = out;
|
|
size_t i = 0;
|
|
size_t j = 0;
|
|
unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
|
|
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
|
|
/* process partial block if any */
|
|
if (EVP_CIPHER_CTX_num(ctx)) {
|
|
for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
|
|
j++, i++, in_ptr++, out_ptr++) {
|
|
if (!EVP_CIPHER_CTX_encrypting(ctx))
|
|
buf[j + 8] = *in_ptr;
|
|
*out_ptr = buf[j] ^ (*in_ptr);
|
|
if (EVP_CIPHER_CTX_encrypting(ctx))
|
|
buf[j + 8] = *out_ptr;
|
|
}
|
|
if (j == 8) {
|
|
memcpy(iv, buf + 8, 8);
|
|
EVP_CIPHER_CTX_set_num(ctx, 0);
|
|
} else {
|
|
EVP_CIPHER_CTX_set_num(ctx, j);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
for (; (inl - i) >= 8; i += 8, in_ptr += 8, out_ptr += 8) {
|
|
/*
|
|
* block cipher current iv
|
|
*/
|
|
gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
|
|
/*
|
|
* xor next block of input text with it and output it
|
|
*/
|
|
/*
|
|
* output this block
|
|
*/
|
|
if (!EVP_CIPHER_CTX_encrypting(ctx))
|
|
memcpy(iv, in_ptr, 8);
|
|
for (j = 0; j < 8; j++) {
|
|
out_ptr[j] = buf[j] ^ in_ptr[j];
|
|
}
|
|
/* Encrypt */
|
|
/* Next iv is next block of cipher text */
|
|
if (EVP_CIPHER_CTX_encrypting(ctx))
|
|
memcpy(iv, out_ptr, 8);
|
|
}
|
|
/* Process rest of buffer */
|
|
if (i < inl) {
|
|
gost_crypt_mesh(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
|
|
if (!EVP_CIPHER_CTX_encrypting(ctx))
|
|
memcpy(buf + 8, in_ptr, inl - i);
|
|
for (j = 0; i < inl; j++, i++) {
|
|
out_ptr[j] = buf[j] ^ in_ptr[j];
|
|
}
|
|
EVP_CIPHER_CTX_set_num(ctx, j);
|
|
if (EVP_CIPHER_CTX_encrypting(ctx))
|
|
memcpy(buf + 8, out_ptr, j);
|
|
} else {
|
|
EVP_CIPHER_CTX_set_num(ctx, 0);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int gost_cipher_do_cnt(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
const unsigned char *in_ptr = in;
|
|
unsigned char *out_ptr = out;
|
|
size_t i = 0;
|
|
size_t j;
|
|
unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
|
|
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
|
|
/* process partial block if any */
|
|
if (EVP_CIPHER_CTX_num(ctx)) {
|
|
for (j = EVP_CIPHER_CTX_num(ctx), i = 0; j < 8 && i < inl;
|
|
j++, i++, in_ptr++, out_ptr++) {
|
|
*out_ptr = buf[j] ^ (*in_ptr);
|
|
}
|
|
if (j == 8) {
|
|
EVP_CIPHER_CTX_set_num(ctx, 0);
|
|
} else {
|
|
EVP_CIPHER_CTX_set_num(ctx, j);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
for (; (inl - i) >= 8; i += 8, in_ptr += 8, out_ptr += 8) {
|
|
/*
|
|
* block cipher current iv
|
|
*/
|
|
/* Encrypt */
|
|
gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
|
|
/*
|
|
* xor next block of input text with it and output it
|
|
*/
|
|
/*
|
|
* output this block
|
|
*/
|
|
for (j = 0; j < 8; j++) {
|
|
out_ptr[j] = buf[j] ^ in_ptr[j];
|
|
}
|
|
}
|
|
/* Process rest of buffer */
|
|
if (i < inl) {
|
|
gost_cnt_next(EVP_CIPHER_CTX_get_cipher_data(ctx), iv, buf);
|
|
for (j = 0; i < inl; j++, i++) {
|
|
out_ptr[j] = buf[j] ^ in_ptr[j];
|
|
}
|
|
EVP_CIPHER_CTX_set_num(ctx, j);
|
|
} else {
|
|
EVP_CIPHER_CTX_set_num(ctx, 0);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Cleaning up of EVP_CIPHER_CTX */
|
|
static int gost_cipher_cleanup(EVP_CIPHER_CTX *ctx)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
EVP_MD_CTX_free(c->omac_ctx);
|
|
gost_destroy(&(c->cctx));
|
|
EVP_CIPHER_CTX_set_app_data(ctx, NULL);
|
|
return 1;
|
|
}
|
|
|
|
static int gost_magma_mgm_cleanup(EVP_CIPHER_CTX *c)
|
|
{
|
|
gost_mgm_ctx *mctx =
|
|
(gost_mgm_ctx *)EVP_CIPHER_CTX_get_cipher_data(c);
|
|
if (mctx == NULL)
|
|
return 0;
|
|
gost_destroy(&mctx->ks.g_ks.cctx);
|
|
OPENSSL_cleanse(&mctx->mgm, sizeof(mctx->mgm));
|
|
EVP_CIPHER_CTX_set_app_data(c, NULL);
|
|
return 1;
|
|
}
|
|
|
|
static int gost_magma_mgm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
|
|
{
|
|
gost_mgm_ctx *mctx =
|
|
(gost_mgm_ctx *)EVP_CIPHER_CTX_get_cipher_data(c);
|
|
unsigned char *buf, *iv;
|
|
int ivlen, enc;
|
|
|
|
switch (type) {
|
|
case EVP_CTRL_INIT:
|
|
ivlen = EVP_CIPHER_iv_length(EVP_CIPHER_CTX_cipher(c));
|
|
iv = EVP_CIPHER_CTX_iv_noconst(c);
|
|
mctx->key_set = 0;
|
|
mctx->iv_set = 0;
|
|
mctx->ivlen = ivlen;
|
|
mctx->iv = iv;
|
|
mctx->taglen = -1;
|
|
return 1;
|
|
|
|
case EVP_CTRL_GET_IVLEN:
|
|
*(int *)ptr = mctx->ivlen;
|
|
return 1;
|
|
|
|
case EVP_CTRL_AEAD_SET_IVLEN:
|
|
if (arg <= 0)
|
|
return 0;
|
|
if ((arg > EVP_MAX_IV_LENGTH) && (arg > mctx->ivlen)) {
|
|
// TODO: Allocate memory for IV or set error
|
|
return 0;
|
|
}
|
|
mctx->ivlen = arg;
|
|
return 1;
|
|
|
|
case EVP_CTRL_AEAD_SET_TAG:
|
|
buf = EVP_CIPHER_CTX_buf_noconst(c);
|
|
enc = EVP_CIPHER_CTX_encrypting(c);
|
|
if (arg <= 0 || arg != 8 || enc) {
|
|
GOSTerr(GOST_F_GOST_MAGMA_MGM_CTRL,
|
|
GOST_R_INVALID_TAG_LENGTH);
|
|
return 0;
|
|
}
|
|
memcpy(buf, ptr, arg);
|
|
mctx->taglen = arg;
|
|
return 1;
|
|
|
|
case EVP_CTRL_AEAD_GET_TAG:
|
|
buf = EVP_CIPHER_CTX_buf_noconst(c);
|
|
enc = EVP_CIPHER_CTX_encrypting(c);
|
|
if (arg <= 0 || arg > 8 || !enc || mctx->taglen < 0) {
|
|
GOSTerr(GOST_F_GOST_MAGMA_MGM_CTRL,
|
|
GOST_R_INVALID_TAG_LENGTH);
|
|
return 0;
|
|
}
|
|
memcpy(ptr, buf, arg);
|
|
return 1;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* Control function for gost cipher */
|
|
static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
|
|
{
|
|
switch (type) {
|
|
case EVP_CTRL_RAND_KEY:
|
|
{
|
|
if (RAND_priv_bytes
|
|
((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
|
|
GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
case EVP_CTRL_PBE_PRF_NID:
|
|
if (ptr) {
|
|
const char *params = get_gost_engine_param(GOST_PARAM_PBE_PARAMS);
|
|
int nid = NID_id_tc26_hmac_gost_3411_2012_512;
|
|
|
|
if (params) {
|
|
if (!strcmp("md_gost12_256", params))
|
|
nid = NID_id_tc26_hmac_gost_3411_2012_256;
|
|
else if (!strcmp("md_gost12_512", params))
|
|
nid = NID_id_tc26_hmac_gost_3411_2012_512;
|
|
else if (!strcmp("md_gost94", params))
|
|
nid = NID_id_HMACGostR3411_94;
|
|
}
|
|
*((int *)ptr) = nid;
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
|
|
case EVP_CTRL_SET_SBOX:
|
|
if (ptr) {
|
|
struct ossl_gost_cipher_ctx *c =
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
int nid;
|
|
int cur_meshing;
|
|
int ret;
|
|
|
|
if (c == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
if (c->count != 0) {
|
|
return -1;
|
|
}
|
|
|
|
nid = OBJ_txt2nid(ptr);
|
|
if (nid == NID_undef) {
|
|
return 0;
|
|
}
|
|
|
|
cur_meshing = c->key_meshing;
|
|
ret = gost_cipher_set_param(c, nid);
|
|
c->key_meshing = cur_meshing;
|
|
return ret;
|
|
} else {
|
|
return 0;
|
|
}
|
|
case EVP_CTRL_KEY_MESH:
|
|
{
|
|
struct ossl_gost_cipher_ctx *c =
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
if (c == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
if (c->count != 0) {
|
|
return -1;
|
|
}
|
|
|
|
c->key_meshing = arg;
|
|
return 1;
|
|
}
|
|
default:
|
|
GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
|
|
return -1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Decrement 8-byte sequence if needed */
|
|
int decrement_sequence(unsigned char *seq, int decrement) {
|
|
if (decrement < 0 || decrement > 1)
|
|
return 0;
|
|
|
|
int j;
|
|
if (decrement) {
|
|
for (j = 7; j >= 0; j--)
|
|
{
|
|
if (seq[j] != 0)
|
|
{
|
|
seq[j]--;
|
|
break;
|
|
}
|
|
else
|
|
seq[j] = 0xFF;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Control function for gost cipher */
|
|
static int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
|
|
{
|
|
switch (type) {
|
|
case EVP_CTRL_RAND_KEY:
|
|
if (RAND_priv_bytes
|
|
((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
|
|
GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_RNG_ERROR);
|
|
return -1;
|
|
}
|
|
break;
|
|
case EVP_CTRL_KEY_MESH:
|
|
{
|
|
struct ossl_gost_cipher_ctx *c =
|
|
EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
if (c == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
if (c->count != 0) {
|
|
return -1;
|
|
}
|
|
|
|
c->key_meshing = arg;
|
|
return 1;
|
|
}
|
|
case EVP_CTRL_TLSTREE:
|
|
{
|
|
unsigned char newkey[32];
|
|
int mode = EVP_CIPHER_CTX_mode(ctx);
|
|
struct ossl_gost_cipher_ctx *ctr_ctx = NULL;
|
|
gost_ctx *c = NULL;
|
|
|
|
unsigned char adjusted_iv[8];
|
|
unsigned char seq[8];
|
|
int j, carry, decrement_arg;
|
|
if (mode != EVP_CIPH_CTR_MODE)
|
|
return -1;
|
|
|
|
ctr_ctx = (struct ossl_gost_cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
c = &(ctr_ctx->cctx);
|
|
|
|
/*
|
|
* 'arg' parameter indicates what we should do with sequence value.
|
|
*
|
|
* When function called, seq is incremented after MAC calculation.
|
|
* In ETM mode, we use seq 'as is' in the ctrl-function (arg = 0)
|
|
* Otherwise we have to decrease it in the implementation (arg = 1).
|
|
*/
|
|
memcpy(seq, ptr, 8);
|
|
decrement_arg = arg;
|
|
if(!decrement_sequence(seq, decrement_arg)) {
|
|
GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_CTRL_CALL_FAILED);
|
|
return -1;
|
|
}
|
|
|
|
if (gost_tlstree(NID_magma_cbc, (const unsigned char *)c->master_key, newkey,
|
|
(const unsigned char *)seq) > 0) {
|
|
memset(adjusted_iv, 0, 8);
|
|
memcpy(adjusted_iv, EVP_CIPHER_CTX_original_iv(ctx), 4);
|
|
for (j = 3, carry = 0; j >= 0; j--)
|
|
{
|
|
int adj_byte = adjusted_iv[j] + seq[j+4] + carry;
|
|
carry = (adj_byte > 255) ? 1 : 0;
|
|
adjusted_iv[j] = adj_byte & 0xFF;
|
|
}
|
|
EVP_CIPHER_CTX_set_num(ctx, 0);
|
|
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), adjusted_iv, 8);
|
|
|
|
magma_key(c, newkey);
|
|
return 1;
|
|
}
|
|
}
|
|
return -1;
|
|
default:
|
|
GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
|
|
return -1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
|
|
{
|
|
switch (type)
|
|
{
|
|
case EVP_CTRL_PROCESS_UNPROTECTED:
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
STACK_OF(X509_ATTRIBUTE) *x = ptr;
|
|
return gost2015_process_unprotected_attributes(x, arg, MAGMA_MAC_MAX_SIZE, c->tag);
|
|
}
|
|
case EVP_CTRL_COPY: {
|
|
EVP_CIPHER_CTX *out = ptr;
|
|
struct ossl_gost_cipher_ctx *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
struct ossl_gost_cipher_ctx *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
|
|
|
|
if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
|
|
out_cctx->omac_ctx = EVP_MD_CTX_new();
|
|
if (out_cctx->omac_ctx == NULL) {
|
|
GOSTerr(GOST_F_MAGMA_CIPHER_CTL_ACPKM_OMAC, ERR_R_MALLOC_FAILURE);
|
|
return -1;
|
|
}
|
|
}
|
|
return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
|
|
}
|
|
default:
|
|
return magma_cipher_ctl(ctx, type, arg, ptr);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Set cipher parameters from ASN1 structure */
|
|
static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
|
|
{
|
|
int len = 0;
|
|
unsigned char *buf = NULL;
|
|
unsigned char *p = NULL;
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
GOST_CIPHER_PARAMS *gcp = GOST_CIPHER_PARAMS_new();
|
|
ASN1_OCTET_STRING *os = NULL;
|
|
if (!gcp) {
|
|
GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
if (!ASN1_OCTET_STRING_set
|
|
(gcp->iv, EVP_CIPHER_CTX_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx))) {
|
|
GOST_CIPHER_PARAMS_free(gcp);
|
|
GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
ASN1_OBJECT_free(gcp->enc_param_set);
|
|
gcp->enc_param_set = OBJ_nid2obj(c->paramNID);
|
|
|
|
len = i2d_GOST_CIPHER_PARAMS(gcp, NULL);
|
|
p = buf = OPENSSL_malloc(len);
|
|
if (!buf) {
|
|
GOST_CIPHER_PARAMS_free(gcp);
|
|
GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
i2d_GOST_CIPHER_PARAMS(gcp, &p);
|
|
GOST_CIPHER_PARAMS_free(gcp);
|
|
|
|
os = ASN1_OCTET_STRING_new();
|
|
|
|
if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
|
|
OPENSSL_free(buf);
|
|
GOSTerr(GOST_F_GOST89_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
OPENSSL_free(buf);
|
|
|
|
ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
|
|
return 1;
|
|
}
|
|
|
|
/* Store parameters into ASN1 structure */
|
|
static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
|
|
{
|
|
int len;
|
|
GOST_CIPHER_PARAMS *gcp = NULL;
|
|
unsigned char *p;
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
int nid;
|
|
|
|
if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
|
|
return -1;
|
|
}
|
|
|
|
p = params->value.sequence->data;
|
|
|
|
gcp = d2i_GOST_CIPHER_PARAMS(NULL, (const unsigned char **)&p,
|
|
params->value.sequence->length);
|
|
|
|
len = gcp->iv->length;
|
|
if (len != EVP_CIPHER_CTX_iv_length(ctx)) {
|
|
GOST_CIPHER_PARAMS_free(gcp);
|
|
GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS, GOST_R_INVALID_IV_LENGTH);
|
|
return -1;
|
|
}
|
|
|
|
nid = OBJ_obj2nid(gcp->enc_param_set);
|
|
if (nid == NID_undef) {
|
|
GOST_CIPHER_PARAMS_free(gcp);
|
|
GOSTerr(GOST_F_GOST89_GET_ASN1_PARAMETERS,
|
|
GOST_R_INVALID_CIPHER_PARAM_OID);
|
|
return -1;
|
|
}
|
|
|
|
if (!gost_cipher_set_param(c, nid)) {
|
|
GOST_CIPHER_PARAMS_free(gcp);
|
|
return -1;
|
|
}
|
|
/*XXX missing non-const accessor */
|
|
memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), gcp->iv->data,
|
|
EVP_CIPHER_CTX_iv_length(ctx));
|
|
|
|
GOST_CIPHER_PARAMS_free(gcp);
|
|
|
|
return 1;
|
|
}
|
|
|
|
#define MAGMA_UKM_LEN 12
|
|
static int magma_set_asn1_parameters (EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
c->key_meshing = 8192;
|
|
|
|
return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 4,
|
|
c->kdf_seed);
|
|
}
|
|
|
|
static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
|
|
{
|
|
struct ossl_gost_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
unsigned char iv[16];
|
|
|
|
c->key_meshing = 8192;
|
|
|
|
if (gost2015_get_asn1_params(params, MAGMA_UKM_LEN, iv, 4, c->kdf_seed) < 0)
|
|
return -1;
|
|
|
|
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, sizeof(iv));
|
|
memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, sizeof(iv));
|
|
/* Key meshing 8 kb*/
|
|
c->key_meshing = 8192;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int gost_imit_init(EVP_MD_CTX *ctx, gost_subst_block * block)
|
|
{
|
|
struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
|
|
memset(c->buffer, 0, sizeof(c->buffer));
|
|
memset(c->partial_block, 0, sizeof(c->partial_block));
|
|
c->count = 0;
|
|
c->bytes_left = 0;
|
|
c->key_meshing = 1;
|
|
c->dgst_size = 4;
|
|
gost_init(&(c->cctx), block);
|
|
return 1;
|
|
}
|
|
|
|
static int gost_imit_init_cpa(EVP_MD_CTX *ctx)
|
|
{
|
|
return gost_imit_init(ctx, &Gost28147_CryptoProParamSetA);
|
|
}
|
|
|
|
static int gost_imit_init_cp_12(EVP_MD_CTX *ctx)
|
|
{
|
|
return gost_imit_init(ctx, &Gost28147_TC26ParamSetZ);
|
|
}
|
|
|
|
static void mac_block_mesh(struct ossl_gost_imit_ctx *c,
|
|
const unsigned char *data)
|
|
{
|
|
/*
|
|
* We are using NULL for iv because CryptoPro doesn't interpret
|
|
* internal state of MAC algorithm as iv during keymeshing (but does
|
|
* initialize internal state from iv in key transport
|
|
*/
|
|
assert(c->count % 8 == 0 && c->count <= 1024);
|
|
if (c->key_meshing && c->count == 1024) {
|
|
cryptopro_key_meshing(&(c->cctx), NULL);
|
|
}
|
|
mac_block(&(c->cctx), c->buffer, data);
|
|
c->count = c->count % 1024 + 8;
|
|
}
|
|
|
|
static int gost_imit_update(EVP_MD_CTX *ctx, const void *data, size_t count)
|
|
{
|
|
struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
|
|
const unsigned char *p = data;
|
|
size_t bytes = count;
|
|
if (!(c->key_set)) {
|
|
GOSTerr(GOST_F_GOST_IMIT_UPDATE, GOST_R_MAC_KEY_NOT_SET);
|
|
return 0;
|
|
}
|
|
if (c->bytes_left) {
|
|
size_t i;
|
|
for (i = c->bytes_left; i < 8 && bytes > 0; bytes--, i++, p++) {
|
|
c->partial_block[i] = *p;
|
|
}
|
|
if (i == 8) {
|
|
mac_block_mesh(c, c->partial_block);
|
|
} else {
|
|
c->bytes_left = i;
|
|
return 1;
|
|
}
|
|
}
|
|
while (bytes > 8) {
|
|
mac_block_mesh(c, p);
|
|
p += 8;
|
|
bytes -= 8;
|
|
}
|
|
if (bytes > 0) {
|
|
memcpy(c->partial_block, p, bytes);
|
|
}
|
|
c->bytes_left = bytes;
|
|
return 1;
|
|
}
|
|
|
|
static int gost_imit_final(EVP_MD_CTX *ctx, unsigned char *md)
|
|
{
|
|
struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
|
|
if (!c->key_set) {
|
|
GOSTerr(GOST_F_GOST_IMIT_FINAL, GOST_R_MAC_KEY_NOT_SET);
|
|
return 0;
|
|
}
|
|
if (c->count == 0 && c->bytes_left) {
|
|
unsigned char buffer[8];
|
|
memset(buffer, 0, 8);
|
|
gost_imit_update(ctx, buffer, 8);
|
|
}
|
|
if (c->bytes_left) {
|
|
int i;
|
|
for (i = c->bytes_left; i < 8; i++) {
|
|
c->partial_block[i] = 0;
|
|
}
|
|
mac_block_mesh(c, c->partial_block);
|
|
}
|
|
get_mac(c->buffer, 8 * c->dgst_size, md);
|
|
return 1;
|
|
}
|
|
|
|
static int gost_imit_ctrl(EVP_MD_CTX *ctx, int type, int arg, void *ptr)
|
|
{
|
|
switch (type) {
|
|
case EVP_MD_CTRL_KEY_LEN:
|
|
*((unsigned int *)(ptr)) = 32;
|
|
return 1;
|
|
case EVP_MD_CTRL_SET_KEY:
|
|
{
|
|
struct ossl_gost_imit_ctx *gost_imit_ctx = EVP_MD_CTX_md_data(ctx);
|
|
|
|
if (EVP_MD_meth_get_init(EVP_MD_CTX_md(ctx)) (ctx) <= 0) {
|
|
GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_MAC_KEY_NOT_SET);
|
|
return 0;
|
|
}
|
|
EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_NO_INIT);
|
|
|
|
if (arg == 0) {
|
|
struct gost_mac_key *key = (struct gost_mac_key *)ptr;
|
|
if (key->mac_param_nid != NID_undef) {
|
|
const struct gost_cipher_info *param =
|
|
get_encryption_params(OBJ_nid2obj(key->mac_param_nid));
|
|
if (param == NULL) {
|
|
GOSTerr(GOST_F_GOST_IMIT_CTRL,
|
|
GOST_R_INVALID_MAC_PARAMS);
|
|
return 0;
|
|
}
|
|
gost_init(&(gost_imit_ctx->cctx), param->sblock);
|
|
}
|
|
gost_key(&(gost_imit_ctx->cctx), key->key);
|
|
gost_imit_ctx->key_set = 1;
|
|
|
|
return 1;
|
|
} else if (arg == 32) {
|
|
gost_key(&(gost_imit_ctx->cctx), ptr);
|
|
gost_imit_ctx->key_set = 1;
|
|
return 1;
|
|
}
|
|
GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_KEY_SIZE);
|
|
return 0;
|
|
}
|
|
case EVP_MD_CTRL_XOF_LEN:
|
|
{
|
|
struct ossl_gost_imit_ctx *c = EVP_MD_CTX_md_data(ctx);
|
|
if (arg < 1 || arg > 8) {
|
|
GOSTerr(GOST_F_GOST_IMIT_CTRL, GOST_R_INVALID_MAC_SIZE);
|
|
return 0;
|
|
}
|
|
c->dgst_size = arg;
|
|
return 1;
|
|
}
|
|
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int gost_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
|
|
{
|
|
if (EVP_MD_CTX_md_data(to) && EVP_MD_CTX_md_data(from)) {
|
|
memcpy(EVP_MD_CTX_md_data(to), EVP_MD_CTX_md_data(from),
|
|
sizeof(struct ossl_gost_imit_ctx));
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Clean up imit ctx */
|
|
static int gost_imit_cleanup(EVP_MD_CTX *ctx)
|
|
{
|
|
memset(EVP_MD_CTX_md_data(ctx), 0, sizeof(struct ossl_gost_imit_ctx));
|
|
return 1;
|
|
}
|
|
/* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */
|