/*
* Maxim Tishkov 2016
+ * Copyright (c) 2020 Vitaly Chikunov <vt@altlinux.org>
* This file is distributed under the same license as OpenSSL
*/
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
#include "gost_grasshopper_cipher.h"
#include "gost_grasshopper_defines.h"
#include "gost_grasshopper_math.h"
#include "gost_grasshopper_core.h"
+#include "gost_gost2015.h"
#include <openssl/evp.h>
#include <openssl/rand.h>
GRASSHOPPER_CIPHER_CFB,
GRASSHOPPER_CIPHER_CTR,
GRASSHOPPER_CIPHER_CTRACPKM,
+ GRASSHOPPER_CIPHER_CTRACPKMOMAC,
};
-static EVP_CIPHER *gost_grasshopper_ciphers[6] = {
- [GRASSHOPPER_CIPHER_ECB] = NULL,
- [GRASSHOPPER_CIPHER_CBC] = NULL,
- [GRASSHOPPER_CIPHER_OFB] = NULL,
- [GRASSHOPPER_CIPHER_CFB] = NULL,
- [GRASSHOPPER_CIPHER_CTR] = NULL,
- [GRASSHOPPER_CIPHER_CTRACPKM] = NULL,
+static GOST_cipher grasshopper_template_cipher = {
+ .block_size = GRASSHOPPER_BLOCK_SIZE,
+ .key_len = GRASSHOPPER_KEY_SIZE,
+ .flags = EVP_CIPH_RAND_KEY |
+ EVP_CIPH_ALWAYS_CALL_INIT,
+ .cleanup = gost_grasshopper_cipher_cleanup,
+ .ctx_size = sizeof(gost_grasshopper_cipher_ctx),
+ .set_asn1_parameters = gost_grasshopper_set_asn1_parameters,
+ .get_asn1_parameters = gost_grasshopper_get_asn1_parameters,
+ .ctrl = gost_grasshopper_cipher_ctl,
};
-static GRASSHOPPER_INLINE void
- gost_grasshopper_cipher_destroy_ofb(gost_grasshopper_cipher_ctx * c);
-static GRASSHOPPER_INLINE void
- gost_grasshopper_cipher_destroy_ctr(gost_grasshopper_cipher_ctx * c);
-
-struct GRASSHOPPER_CIPHER_PARAMS {
- int nid;
- grasshopper_init_cipher_func init_cipher;
- grasshopper_do_cipher_func do_cipher;
- grasshopper_destroy_cipher_func destroy_cipher;
- int block_size;
- int ctx_size;
- int iv_size;
- bool padding;
+GOST_cipher grasshopper_ecb_cipher = {
+ .nid = NID_grasshopper_ecb,
+ .template = &grasshopper_template_cipher,
+ .flags = EVP_CIPH_ECB_MODE,
+ .init = gost_grasshopper_cipher_init_ecb,
+ .do_cipher = gost_grasshopper_cipher_do_ecb,
+};
+
+GOST_cipher grasshopper_cbc_cipher = {
+ .nid = NID_grasshopper_cbc,
+ .template = &grasshopper_template_cipher,
+ .iv_len = 16,
+ .flags = EVP_CIPH_CBC_MODE |
+ EVP_CIPH_CUSTOM_IV,
+ .init = gost_grasshopper_cipher_init_cbc,
+ .do_cipher = gost_grasshopper_cipher_do_cbc,
+};
+
+GOST_cipher grasshopper_ofb_cipher = {
+ .nid = NID_grasshopper_ofb,
+ .template = &grasshopper_template_cipher,
+ .block_size = 1,
+ .iv_len = 16,
+ .flags = EVP_CIPH_OFB_MODE |
+ EVP_CIPH_NO_PADDING |
+ EVP_CIPH_CUSTOM_IV,
+ .init = gost_grasshopper_cipher_init_ofb,
+ .do_cipher = gost_grasshopper_cipher_do_ofb,
};
-static struct GRASSHOPPER_CIPHER_PARAMS gost_cipher_params[6] = {
- [GRASSHOPPER_CIPHER_ECB] = {
- NID_grasshopper_ecb,
- gost_grasshopper_cipher_init_ecb,
- gost_grasshopper_cipher_do_ecb,
- NULL,
- 16,
- sizeof(gost_grasshopper_cipher_ctx),
- 0,
- true}
- ,
- [GRASSHOPPER_CIPHER_CBC] = {
- NID_grasshopper_cbc,
- gost_grasshopper_cipher_init_cbc,
- gost_grasshopper_cipher_do_cbc,
- NULL,
- 16,
- sizeof(gost_grasshopper_cipher_ctx),
- 16,
- true}
- ,
- [GRASSHOPPER_CIPHER_OFB] = {
- NID_grasshopper_ofb,
- gost_grasshopper_cipher_init_ofb,
- gost_grasshopper_cipher_do_ofb,
- gost_grasshopper_cipher_destroy_ofb,
- 1,
- sizeof(gost_grasshopper_cipher_ctx_ofb),
- 16,
- false}
- ,
- [GRASSHOPPER_CIPHER_CFB] = {
- NID_grasshopper_cfb,
- gost_grasshopper_cipher_init_cfb,
- gost_grasshopper_cipher_do_cfb,
- NULL,
- 1,
- sizeof(gost_grasshopper_cipher_ctx),
- 16,
- false}
- ,
- [GRASSHOPPER_CIPHER_CTR] = {
- NID_grasshopper_ctr,
- gost_grasshopper_cipher_init_ctr,
- gost_grasshopper_cipher_do_ctr,
- gost_grasshopper_cipher_destroy_ctr,
- 1,
- sizeof(gost_grasshopper_cipher_ctx_ctr),
- /* IV size is set to match full block, to make it responsibility of
- * user to assign correct values (IV || 0), and to make naive context
- * copy possible (for software such as openssh) */
- 16,
- false}
- ,
- [GRASSHOPPER_CIPHER_CTRACPKM] = {
- NID_id_tc26_cipher_gostr3412_2015_kuznyechik_ctracpkm,
- gost_grasshopper_cipher_init_ctracpkm,
- gost_grasshopper_cipher_do_ctracpkm,
- gost_grasshopper_cipher_destroy_ctr,
- 1,
- sizeof
- (gost_grasshopper_cipher_ctx_ctr),
- 16,
- false}
- ,
+GOST_cipher grasshopper_cfb_cipher = {
+ .nid = NID_grasshopper_cfb,
+ .template = &grasshopper_template_cipher,
+ .block_size = 1,
+ .iv_len = 16,
+ .flags = EVP_CIPH_CFB_MODE |
+ EVP_CIPH_NO_PADDING |
+ EVP_CIPH_CUSTOM_IV,
+ .init = gost_grasshopper_cipher_init_cfb,
+ .do_cipher = gost_grasshopper_cipher_do_cfb,
+};
+
+GOST_cipher grasshopper_ctr_cipher = {
+ .nid = NID_grasshopper_ctr,
+ .template = &grasshopper_template_cipher,
+ .block_size = 1,
+ .iv_len = 8,
+ .flags = EVP_CIPH_CTR_MODE |
+ EVP_CIPH_NO_PADDING |
+ EVP_CIPH_CUSTOM_IV,
+ .init = gost_grasshopper_cipher_init_ctr,
+ .do_cipher = gost_grasshopper_cipher_do_ctr,
+ .ctx_size = sizeof(gost_grasshopper_cipher_ctx_ctr),
+};
+
+GOST_cipher grasshopper_ctr_acpkm_cipher = {
+ .nid = NID_kuznyechik_ctr_acpkm,
+ .template = &grasshopper_template_cipher,
+ .block_size = 1,
+ .iv_len = 8,
+ .flags = EVP_CIPH_CTR_MODE |
+ EVP_CIPH_NO_PADDING |
+ EVP_CIPH_CUSTOM_IV,
+ .init = gost_grasshopper_cipher_init_ctracpkm,
+ .do_cipher = gost_grasshopper_cipher_do_ctracpkm,
+ .ctx_size = sizeof(gost_grasshopper_cipher_ctx_ctr),
+};
+
+GOST_cipher grasshopper_ctr_acpkm_omac_cipher = {
+ .nid = NID_kuznyechik_ctr_acpkm_omac,
+ .template = &grasshopper_template_cipher,
+ .block_size = 1,
+ .iv_len = 8,
+ .flags = EVP_CIPH_CTR_MODE |
+ EVP_CIPH_NO_PADDING |
+ EVP_CIPH_CUSTOM_IV |
+ EVP_CIPH_FLAG_CUSTOM_CIPHER |
+ EVP_CIPH_FLAG_CIPHER_WITH_MAC |
+ EVP_CIPH_CUSTOM_COPY,
+ .init = gost_grasshopper_cipher_init_ctracpkm_omac,
+ .do_cipher = gost_grasshopper_cipher_do_ctracpkm_omac,
+ .ctx_size = sizeof(gost_grasshopper_cipher_ctx_ctr),
};
/* first 256 bit of D from draft-irtf-cfrg-re-keying-12 */
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 256 bit */
};
-static void acpkm_next(gost_grasshopper_cipher_ctx * c) {
+static void acpkm_next(gost_grasshopper_cipher_ctx * c)
+{
unsigned char newkey[GRASSHOPPER_KEY_SIZE];
const int J = GRASSHOPPER_KEY_SIZE / GRASSHOPPER_BLOCK_SIZE;
int n;
for (n = 0; n < J; n++) {
- const unsigned char *D_n =
- &ACPKM_D_2018[n * GRASSHOPPER_BLOCK_SIZE];
+ const unsigned char *D_n = &ACPKM_D_2018[n * GRASSHOPPER_BLOCK_SIZE];
grasshopper_encrypt_block(&c->encrypt_round_keys,
(grasshopper_w128_t *) D_n,
}
/* Set 256 bit key into context */
-GRASSHOPPER_INLINE void
- gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx * c,
- const uint8_t *k) {
+static GRASSHOPPER_INLINE void
+gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx * c, const uint8_t *k)
+{
int i;
for (i = 0; i < 2; i++) {
grasshopper_copy128(&c->key.k.k[i],
}
/* Set master 256-bit key to be used in TLSTREE calculation into context */
-GRASSHOPPER_INLINE void
- gost_grasshopper_master_key(gost_grasshopper_cipher_ctx * c,
- const uint8_t *k) {
+static GRASSHOPPER_INLINE void
+gost_grasshopper_master_key(gost_grasshopper_cipher_ctx * c, const uint8_t *k)
+{
int i;
for (i = 0; i < 2; i++) {
grasshopper_copy128(&c->master_key.k.k[i],
}
/* Cleans up key from context */
-GRASSHOPPER_INLINE void
- gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx * c) {
+static GRASSHOPPER_INLINE void
+gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx * c)
+{
int i;
for (i = 0; i < 2; i++) {
grasshopper_zero128(&c->key.k.k[i]);
- grasshopper_zero128(&c->master_key.k.k[i]);
+ grasshopper_zero128(&c->master_key.k.k[i]);
}
for (i = 0; i < GRASSHOPPER_ROUND_KEYS_COUNT; i++) {
grasshopper_zero128(&c->encrypt_round_keys.k[i]);
}
static GRASSHOPPER_INLINE void
- gost_grasshopper_cipher_destroy_ofb(gost_grasshopper_cipher_ctx * c) {
- gost_grasshopper_cipher_ctx_ofb *ctx =
- (gost_grasshopper_cipher_ctx_ofb *) c;
-
- grasshopper_zero128(&ctx->buffer1);
-}
-
-static GRASSHOPPER_INLINE void
- gost_grasshopper_cipher_destroy_ctr(gost_grasshopper_cipher_ctx * c) {
+gost_grasshopper_cipher_destroy_ctr(gost_grasshopper_cipher_ctx * c)
+{
gost_grasshopper_cipher_ctx_ctr *ctx =
(gost_grasshopper_cipher_ctx_ctr *) c;
+ if (ctx->omac_ctx)
+ EVP_MD_CTX_free(ctx->omac_ctx);
+
grasshopper_zero128(&ctx->partial_buffer);
}
-int gost_grasshopper_cipher_init(EVP_CIPHER_CTX *ctx,
+static int gost_grasshopper_cipher_init(EVP_CIPHER_CTX *ctx,
const unsigned char *key,
- const unsigned char *iv, int enc) {
+ const unsigned char *iv, int enc)
+{
gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
- EVP_CIPHER_CTX_set_app_data(ctx,
- EVP_CIPHER_CTX_get_cipher_data(ctx));
+ EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
+ if (enc && c->type == GRASSHOPPER_CIPHER_CTRACPKM) {
+ gost_grasshopper_cipher_ctx_ctr *ctr = EVP_CIPHER_CTX_get_cipher_data(ctx);
+ if (init_zero_kdf_seed(ctr->kdf_seed) == 0)
+ return -1;
+ }
}
if (key != NULL) {
return 1;
}
-GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX *ctx,
- const unsigned char
- *key,
- const unsigned char
- *iv, int enc) {
+static GRASSHOPPER_INLINE int
+gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX *ctx, const unsigned char
+ *key, const unsigned char
+ *iv, int enc)
+{
gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
c->type = GRASSHOPPER_CIPHER_ECB;
return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cbc(EVP_CIPHER_CTX *ctx,
- const unsigned char
- *key,
- const unsigned char
- *iv, int enc) {
+static GRASSHOPPER_INLINE int
+gost_grasshopper_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char
+ *key, const unsigned char
+ *iv, int enc)
+{
gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
c->type = GRASSHOPPER_CIPHER_CBC;
return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX *ctx,
- const unsigned char
- *key,
- const unsigned char
- *iv, int enc) {
- gost_grasshopper_cipher_ctx_ofb *c =
- EVP_CIPHER_CTX_get_cipher_data(ctx);
-
- c->c.type = GRASSHOPPER_CIPHER_OFB;
-
- grasshopper_zero128(&c->buffer1);
-
+static GRASSHOPPER_INLINE
+int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX *ctx, const unsigned char
+ *key, const unsigned char
+ *iv, int enc)
+{
+ gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
+ c->type = GRASSHOPPER_CIPHER_OFB;
return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX *ctx,
- const unsigned char
- *key,
- const unsigned char
- *iv, int enc) {
+static GRASSHOPPER_INLINE int
+gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX *ctx, const unsigned char
+ *key, const unsigned char
+ *iv, int enc)
+{
gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
c->type = GRASSHOPPER_CIPHER_CFB;
return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX *ctx,
- const unsigned char
- *key,
- const unsigned char
- *iv, int enc) {
- gost_grasshopper_cipher_ctx_ctr *c =
- EVP_CIPHER_CTX_get_cipher_data(ctx);
+static GRASSHOPPER_INLINE int
+gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX *ctx, const unsigned char
+ *key, const unsigned char
+ *iv, int enc)
+{
+ gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
c->c.type = GRASSHOPPER_CIPHER_CTR;
EVP_CIPHER_CTX_set_num(ctx, 0);
return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctracpkm(EVP_CIPHER_CTX
- *ctx,
- const unsigned
- char *key,
- const unsigned
- char *iv,
- int enc) {
- gost_grasshopper_cipher_ctx_ctr *c =
- EVP_CIPHER_CTX_get_cipher_data(ctx);
+static GRASSHOPPER_INLINE int
+gost_grasshopper_cipher_init_ctracpkm(EVP_CIPHER_CTX
+ *ctx, const unsigned
+ char *key, const unsigned
+ char *iv, int enc)
+{
+ gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
/* NB: setting type makes EVP do_cipher callback useless */
c->c.type = GRASSHOPPER_CIPHER_CTRACPKM;
return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-GRASSHOPPER_INLINE int gost_grasshopper_cipher_do(EVP_CIPHER_CTX *ctx,
- unsigned char *out,
- const unsigned char *in,
- size_t inl) {
- gost_grasshopper_cipher_ctx *c =
- (gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
- struct GRASSHOPPER_CIPHER_PARAMS *params = &gost_cipher_params[c->type];
+static GRASSHOPPER_INLINE int
+gost_grasshopper_cipher_init_ctracpkm_omac(EVP_CIPHER_CTX
+ *ctx, const unsigned
+ char *key, const unsigned
+ char *iv, int enc)
+{
+ gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
+
+ /* NB: setting type makes EVP do_cipher callback useless */
+ c->c.type = GRASSHOPPER_CIPHER_CTRACPKMOMAC;
+ EVP_CIPHER_CTX_set_num(ctx, 0);
+ c->section_size = 4096;
+
+ if (key) {
+ unsigned char cipher_key[32];
+ c->omac_ctx = EVP_MD_CTX_new();
+
+ if (c->omac_ctx == NULL) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_INIT_CTRACPKM_OMAC, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
- return params->do_cipher(ctx, out, in, inl);
+ if (gost2015_acpkm_omac_init(NID_kuznyechik_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 gost_grasshopper_cipher_init(ctx, cipher_key, iv, enc);
+ }
+
+ return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t inl) {
+static int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
gost_grasshopper_cipher_ctx *c =
(gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
bool encrypting = (bool) EVP_CIPHER_CTX_encrypting(ctx);
return 1;
}
-int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t inl) {
+static int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
gost_grasshopper_cipher_ctx *c =
(gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
bool encrypting = (bool) EVP_CIPHER_CTX_encrypting(ctx);
const unsigned char *current_in = in;
unsigned char *current_out = out;
- grasshopper_w128_t *currentInputBlock;
- grasshopper_w128_t *currentOutputBlock;
size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
size_t i;
grasshopper_w128_t *currentBlock;
for (i = 0; i < blocks;
i++, current_in += GRASSHOPPER_BLOCK_SIZE, current_out +=
GRASSHOPPER_BLOCK_SIZE) {
- currentInputBlock = (grasshopper_w128_t *) current_in;
- currentOutputBlock = (grasshopper_w128_t *) current_out;
+ grasshopper_w128_t *currentInputBlock = (grasshopper_w128_t *) current_in;
+ grasshopper_w128_t *currentOutputBlock = (grasshopper_w128_t *) current_out;
if (encrypting) {
grasshopper_append128(currentBlock, currentInputBlock);
grasshopper_encrypt_block(&c->encrypt_round_keys, currentBlock,
return 1;
}
-void inc_counter(unsigned char *counter, size_t counter_bytes) {
- unsigned char c;
+void inc_counter(unsigned char *counter, size_t counter_bytes)
+{
unsigned int n = counter_bytes;
do {
+ unsigned char c;
--n;
c = counter[n];
++c;
}
/* increment counter (128-bit int) by 1 */
-static void ctr128_inc(unsigned char *counter) {
+static void ctr128_inc(unsigned char *counter)
+{
inc_counter(counter, 16);
}
-int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t inl) {
- gost_grasshopper_cipher_ctx_ctr *c =
- (gost_grasshopper_cipher_ctx_ctr *)
+static int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ gost_grasshopper_cipher_ctx_ctr *c = (gost_grasshopper_cipher_ctx_ctr *)
EVP_CIPHER_CTX_get_cipher_data(ctx);
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
const unsigned char *current_in = in;
grasshopper_w128_t *currentInputBlock;
grasshopper_w128_t *currentOutputBlock;
unsigned int n = EVP_CIPHER_CTX_num(ctx);
- size_t lasted;
+ size_t lasted = inl;
size_t i;
+ size_t blocks;
+ grasshopper_w128_t *iv_buffer;
+ grasshopper_w128_t tmp;
- while (n && inl) {
+ while (n && lasted) {
*(current_out++) = *(current_in++) ^ c->partial_buffer.b[n];
- --inl;
+ --lasted;
n = (n + 1) % GRASSHOPPER_BLOCK_SIZE;
}
EVP_CIPHER_CTX_set_num(ctx, n);
- size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
+ blocks = lasted / GRASSHOPPER_BLOCK_SIZE;
- grasshopper_w128_t *iv_buffer = (grasshopper_w128_t *) iv;
- grasshopper_w128_t tmp;
+ iv_buffer = (grasshopper_w128_t *) iv;
// full parts
for (i = 0; i < blocks; i++) {
ctr128_inc(iv_buffer->b);
current_in += GRASSHOPPER_BLOCK_SIZE;
current_out += GRASSHOPPER_BLOCK_SIZE;
+ lasted -= GRASSHOPPER_BLOCK_SIZE;
}
- // last part
- lasted = inl - blocks * GRASSHOPPER_BLOCK_SIZE;
if (lasted > 0) {
currentInputBlock = (grasshopper_w128_t *) current_in;
currentOutputBlock = (grasshopper_w128_t *) current_out;
ctr128_inc(iv_buffer->b);
}
- return 1;
+ return inl;
}
#define GRASSHOPPER_BLOCK_MASK (GRASSHOPPER_BLOCK_SIZE - 1)
static inline void apply_acpkm_grasshopper(gost_grasshopper_cipher_ctx_ctr *
- ctx, unsigned int *num) {
+ ctx, unsigned int *num)
+{
if (!ctx->section_size || (*num < ctx->section_size))
return;
acpkm_next(&ctx->c);
/* If meshing is not configured via ctrl (setting section_size)
* this function works exactly like plain ctr */
-int gost_grasshopper_cipher_do_ctracpkm(EVP_CIPHER_CTX *ctx,
- unsigned char *out,
- const unsigned char *in,
- size_t inl) {
- gost_grasshopper_cipher_ctx_ctr *c =
- EVP_CIPHER_CTX_get_cipher_data(ctx);
+static int gost_grasshopper_cipher_do_ctracpkm(EVP_CIPHER_CTX *ctx,
+ unsigned char *out,
+ const unsigned char *in,
+ size_t inl)
+{
+ gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
unsigned int num = EVP_CIPHER_CTX_num(ctx);
+ size_t blocks, i, lasted = inl;
+ grasshopper_w128_t tmp;
- while ((num & GRASSHOPPER_BLOCK_MASK) && inl) {
+ while ((num & GRASSHOPPER_BLOCK_MASK) && lasted) {
*out++ = *in++ ^ c->partial_buffer.b[num & GRASSHOPPER_BLOCK_MASK];
- --inl;
+ --lasted;
num++;
}
- size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
- size_t i;
- grasshopper_w128_t tmp;
+ blocks = lasted / GRASSHOPPER_BLOCK_SIZE;
// full parts
for (i = 0; i < blocks; i++) {
apply_acpkm_grasshopper(c, &num);
grasshopper_encrypt_block(&c->c.encrypt_round_keys,
(grasshopper_w128_t *) iv,
- (grasshopper_w128_t *) &c->partial_buffer, &c->c.buffer);
- grasshopper_plus128(&tmp, &c->partial_buffer, (grasshopper_w128_t *) in);
+ (grasshopper_w128_t *) & c->partial_buffer,
+ &c->c.buffer);
+ grasshopper_plus128(&tmp, &c->partial_buffer,
+ (grasshopper_w128_t *) in);
grasshopper_copy128((grasshopper_w128_t *) out, &tmp);
ctr128_inc(iv);
in += GRASSHOPPER_BLOCK_SIZE;
out += GRASSHOPPER_BLOCK_SIZE;
num += GRASSHOPPER_BLOCK_SIZE;
+ lasted -= GRASSHOPPER_BLOCK_SIZE;
}
// last part
- size_t lasted = inl - blocks * GRASSHOPPER_BLOCK_SIZE;
if (lasted > 0) {
apply_acpkm_grasshopper(c, &num);
grasshopper_encrypt_block(&c->c.encrypt_round_keys,
}
EVP_CIPHER_CTX_set_num(ctx, num);
- return 1;
+ return inl;
}
+static int gost_grasshopper_cipher_do_ctracpkm_omac(EVP_CIPHER_CTX *ctx,
+ unsigned char *out,
+ const unsigned char *in,
+ size_t inl)
+{
+ int result;
+ gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
+ /* 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 (in == NULL && inl == 0) { /* Final call */
+ return gost2015_final_call(ctx, c->omac_ctx, KUZNYECHIK_MAC_MAX_SIZE, c->tag, gost_grasshopper_cipher_do_ctracpkm);
+ }
+
+ if (in == NULL) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_DO_CTRACPKM_OMAC, ERR_R_EVP_LIB);
+ return -1;
+ }
+ result = gost_grasshopper_cipher_do_ctracpkm(ctx, out, in, inl);
+
+ /* 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 result;
+}
/*
* Fixed 128-bit IV implementation make shift regiser redundant.
*/
-static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx_ofb * ctx,
+static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx * ctx,
grasshopper_w128_t * iv,
- grasshopper_w128_t * buf) {
- memcpy(&ctx->buffer1, iv, 16);
- grasshopper_encrypt_block(&ctx->c.encrypt_round_keys, &ctx->buffer1,
- buf, &ctx->c.buffer);
+ grasshopper_w128_t * buf)
+{
+ grasshopper_w128_t tmp;
+ memcpy(&tmp, iv, 16);
+ grasshopper_encrypt_block(&ctx->encrypt_round_keys, &tmp,
+ buf, &ctx->buffer);
memcpy(iv, buf, 16);
}
-int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t inl) {
- gost_grasshopper_cipher_ctx_ofb *c =
- (gost_grasshopper_cipher_ctx_ofb *)
+static int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ gost_grasshopper_cipher_ctx *c = (gost_grasshopper_cipher_ctx *)
EVP_CIPHER_CTX_get_cipher_data(ctx);
const unsigned char *in_ptr = in;
unsigned char *out_ptr = out;
return 1;
}
-int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t inl) {
+static int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
gost_grasshopper_cipher_ctx *c =
(gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
const unsigned char *in_ptr = in;
}
}
if (j == GRASSHOPPER_BLOCK_SIZE) {
- memcpy(iv, buf + GRASSHOPPER_BLOCK_SIZE,
- GRASSHOPPER_BLOCK_SIZE);
+ memcpy(iv, buf + GRASSHOPPER_BLOCK_SIZE, GRASSHOPPER_BLOCK_SIZE);
EVP_CIPHER_CTX_set_num(ctx, 0);
} else {
EVP_CIPHER_CTX_set_num(ctx, (int)j);
return 1;
}
-int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX *ctx) {
+static int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX *ctx)
+{
gost_grasshopper_cipher_ctx *c =
(gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
if (!c)
return 1;
- struct GRASSHOPPER_CIPHER_PARAMS *params = &gost_cipher_params[c->type];
-
- gost_grasshopper_cipher_destroy(c);
- if (params->destroy_cipher != NULL) {
- params->destroy_cipher(c);
- }
+ if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CTR_MODE)
+ gost_grasshopper_cipher_destroy_ctr(c);
EVP_CIPHER_CTX_set_app_data(ctx, NULL);
return 1;
}
-int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX *ctx,
- ASN1_TYPE *params) {
- int len = 0;
- unsigned char *buf = NULL;
- ASN1_OCTET_STRING *os = NULL;
+static int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
+{
+ if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CTR_MODE) {
+ gost_grasshopper_cipher_ctx_ctr *ctr = EVP_CIPHER_CTX_get_cipher_data(ctx);
- os = ASN1_OCTET_STRING_new();
+ /* CMS implies 256kb section_size */
+ ctr->section_size = 256*1024;
- if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) {
- OPENSSL_free(buf);
- GOSTerr(GOST_F_GOST_GRASSHOPPER_SET_ASN1_PARAMETERS,
- ERR_R_MALLOC_FAILURE);
- return 0;
+ return gost2015_set_asn1_params(params,
+ EVP_CIPHER_CTX_original_iv(ctx), 8, ctr->kdf_seed);
}
- OPENSSL_free(buf);
-
- ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
- return 1;
+ return 0;
}
-GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX
- *ctx,
- ASN1_TYPE
- *params) {
- int ret = -1;
+static GRASSHOPPER_INLINE int
+gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
+{
+ if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CTR_MODE) {
+ gost_grasshopper_cipher_ctx_ctr *ctr = EVP_CIPHER_CTX_get_cipher_data(ctx);
- if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
- return ret;
- }
+ int iv_len = 16;
+ unsigned char iv[16];
- return 1;
+ if (gost2015_get_asn1_params(params, 16, iv, 8, ctr->kdf_seed) == 0) {
+ return 0;
+ }
+
+ memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, iv_len);
+ memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, iv_len);
+
+ /* CMS implies 256kb section_size */
+ ctr->section_size = 256*1024;
+ return 1;
+ }
+ return 0;
}
-int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg,
- void *ptr) {
+static int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
+{
switch (type) {
case EVP_CTRL_RAND_KEY:{
- if (RAND_bytes
- ((unsigned char *)ptr,
- EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
- GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
- GOST_R_RNG_ERROR);
+ if (RAND_priv_bytes
+ ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, GOST_R_RNG_ERROR);
return -1;
}
break;
case EVP_CTRL_KEY_MESH:{
gost_grasshopper_cipher_ctx_ctr *c =
EVP_CIPHER_CTX_get_cipher_data(ctx);
- if (c->c.type != GRASSHOPPER_CIPHER_CTRACPKM || !arg
- || (arg % GRASSHOPPER_BLOCK_SIZE))
+ if ((c->c.type != GRASSHOPPER_CIPHER_CTRACPKM &&
+ c->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC)
+ || (arg == 0)
+ || (arg % GRASSHOPPER_BLOCK_SIZE))
return -1;
c->section_size = arg;
break;
}
-#ifdef EVP_CTRL_TLS1_2_TLSTREE
- case EVP_CTRL_TLS1_2_TLSTREE:
- {
- unsigned char newkey[32];
- int mode = EVP_CIPHER_CTX_mode(ctx);
- gost_grasshopper_cipher_ctx_ctr *ctr_ctx = NULL;
- gost_grasshopper_cipher_ctx *c = NULL;
-
- if (mode != EVP_CIPH_CTR_MODE)
- return -1;
-
- ctr_ctx =
- (gost_grasshopper_cipher_ctx_ctr *) EVP_CIPHER_CTX_get_cipher_data(ctx);
- c = &(ctr_ctx->c);
-
- if (gost_tlstree(NID_grasshopper_cbc, c->master_key.k.b, newkey,
- (const unsigned char *)ptr) )
- {
- gost_grasshopper_cipher_key(c, newkey);
- return 1;
- }
- }
- return -1;
-#endif
- default:
- GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
- GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
+ case EVP_CTRL_TLSTREE:
+ {
+ unsigned char newkey[32];
+ int mode = EVP_CIPHER_CTX_mode(ctx);
+ gost_grasshopper_cipher_ctx_ctr *ctr_ctx = NULL;
+ gost_grasshopper_cipher_ctx *c = NULL;
+
+ unsigned char adjusted_iv[16];
+ unsigned char seq[8];
+ int j, carry, decrement_arg;
+ if (mode != EVP_CIPH_CTR_MODE)
+ return -1;
+
+ ctr_ctx = (gost_grasshopper_cipher_ctx_ctr *)
+ EVP_CIPHER_CTX_get_cipher_data(ctx);
+ c = &(ctr_ctx->c);
+
+ /*
+ * '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_GOST_GRASSHOPPER_CIPHER_CTL, GOST_R_CTRL_CALL_FAILED);
+ return -1;
+ }
+
+ if (gost_tlstree(NID_grasshopper_cbc, c->master_key.k.b, newkey,
+ (const unsigned char *)seq) > 0) {
+ memset(adjusted_iv, 0, 16);
+ memcpy(adjusted_iv, EVP_CIPHER_CTX_original_iv(ctx), 8);
+ for(j=7,carry=0; j>=0; j--)
+ {
+ int adj_byte = adjusted_iv[j]+seq[j]+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, 16);
+
+ gost_grasshopper_cipher_key(c, newkey);
+ return 1;
+ }
+ }
return -1;
- }
- return 1;
-}
+#if 0
+ case EVP_CTRL_AEAD_GET_TAG:
+ case EVP_CTRL_AEAD_SET_TAG:
+ {
+ int taglen = arg;
+ unsigned char *tag = ptr;
+
+ gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
+ if (c->c.type != GRASSHOPPER_CIPHER_MGM)
+ return -1;
-GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_create(int
- cipher_type,
- int
- block_size) {
- return EVP_CIPHER_meth_new(cipher_type, block_size /* block_size */ ,
- GRASSHOPPER_KEY_SIZE /* key_size */ );
-}
+ if (taglen > KUZNYECHIK_MAC_MAX_SIZE) {
+ CRYPTOCOMerr(CRYPTOCOM_F_GOST_GRASSHOPPER_CIPHER_CTL,
+ CRYPTOCOM_R_INVALID_TAG_LENGTH);
+ return -1;
+ }
-const int cipher_gost_grasshopper_setup(EVP_CIPHER *cipher, uint8_t mode,
- int iv_size, bool padding) {
- return EVP_CIPHER_meth_set_iv_length(cipher, iv_size)
- && EVP_CIPHER_meth_set_flags(cipher,
- (unsigned long)(mode |
- ((!padding) ?
- EVP_CIPH_NO_PADDING :
- 0) | ((iv_size >
- 0) ?
- EVP_CIPH_CUSTOM_IV
- : 0) |
- EVP_CIPH_RAND_KEY |
- EVP_CIPH_ALWAYS_CALL_INIT)
- )
- && EVP_CIPHER_meth_set_cleanup(cipher,
- gost_grasshopper_cipher_cleanup)
- && EVP_CIPHER_meth_set_set_asn1_params(cipher,
- gost_grasshopper_set_asn1_parameters)
- && EVP_CIPHER_meth_set_get_asn1_params(cipher,
- gost_grasshopper_get_asn1_parameters)
- && EVP_CIPHER_meth_set_ctrl(cipher, gost_grasshopper_cipher_ctl)
- && EVP_CIPHER_meth_set_do_cipher(cipher,
- gost_grasshopper_cipher_do);
-}
+ if (type == EVP_CTRL_AEAD_GET_TAG)
+ memcpy(tag, c->final_tag, taglen);
+ else
+ memcpy(c->final_tag, tag, taglen);
-const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper(uint8_t mode,
- uint8_t num) {
- EVP_CIPHER **cipher;
- struct GRASSHOPPER_CIPHER_PARAMS *params;
+ return 1;
+ }
+#endif
+ case EVP_CTRL_PROCESS_UNPROTECTED:
+ {
+ STACK_OF(X509_ATTRIBUTE) *x = ptr;
+ gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
- cipher = &gost_grasshopper_ciphers[num];
+ if (c->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC)
+ return -1;
- if (*cipher == NULL) {
- params = &gost_cipher_params[num];
+ return gost2015_process_unprotected_attributes(x, arg, KUZNYECHIK_MAC_MAX_SIZE, c->tag);
+ }
+ case EVP_CTRL_COPY: {
+ EVP_CIPHER_CTX *out = ptr;
- int nid = params->nid;
- grasshopper_init_cipher_func init_cipher = params->init_cipher;
- int block_size = params->block_size;
- int ctx_size = params->ctx_size;
- int iv_size = params->iv_size;
- bool padding = params->padding;
+ gost_grasshopper_cipher_ctx_ctr *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out);
+ gost_grasshopper_cipher_ctx_ctr *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx);
- *cipher = cipher_gost_grasshopper_create(nid, block_size);
- if (*cipher == NULL) {
- return NULL;
- }
+ if (in_cctx->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC)
+ return -1;
- if (!cipher_gost_grasshopper_setup(*cipher, mode, iv_size, padding)
- || !EVP_CIPHER_meth_set_init(*cipher, init_cipher)
- || !EVP_CIPHER_meth_set_impl_ctx_size(*cipher, ctx_size)) {
- EVP_CIPHER_meth_free(*cipher);
- *cipher = NULL;
+ 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_GOST_GRASSHOPPER_CIPHER_CTL, ERR_R_MALLOC_FAILURE);
+ return -1;
+ }
}
+ return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
}
-
- return *cipher;
-}
-
-const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ecb() {
- return cipher_gost_grasshopper(EVP_CIPH_ECB_MODE,
- GRASSHOPPER_CIPHER_ECB);
-}
-
-const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_cbc() {
- return cipher_gost_grasshopper(EVP_CIPH_CBC_MODE,
- GRASSHOPPER_CIPHER_CBC);
-}
-
-const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ofb() {
- return cipher_gost_grasshopper(EVP_CIPH_OFB_MODE,
- GRASSHOPPER_CIPHER_OFB);
-}
-
-const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_cfb() {
- return cipher_gost_grasshopper(EVP_CIPH_CFB_MODE,
- GRASSHOPPER_CIPHER_CFB);
-}
-
-const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctr() {
- return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE,
- GRASSHOPPER_CIPHER_CTR);
-}
-
-const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctracpkm() {
- return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE,
- GRASSHOPPER_CIPHER_CTRACPKM);
-}
-
-void cipher_gost_grasshopper_destroy(void) {
- EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_ECB]);
- gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_ECB] = NULL;
- EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CBC]);
- gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CBC] = NULL;
- EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_OFB]);
- gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_OFB] = NULL;
- EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CFB]);
- gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CFB] = NULL;
- EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTR]);
- gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTR] = NULL;
- EVP_CIPHER_meth_free(gost_grasshopper_ciphers
- [GRASSHOPPER_CIPHER_CTRACPKM]);
- gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTRACPKM] = NULL;
+ default:
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
+ GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
+ return -1;
+ }
+ return 1;
}
-#if defined(__cplusplus)
+/* Called directly by CMAC_ACPKM_Init() */
+const EVP_CIPHER *cipher_gost_grasshopper_ctracpkm()
+{
+ return GOST_init_cipher(&grasshopper_ctr_acpkm_cipher);
}
-#endif
+/* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */