* 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 EVP_CIPHER *gost_grasshopper_ciphers[7] = {
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
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);
+gost_grasshopper_cipher_destroy_ctr(gost_grasshopper_cipher_ctx * c);
struct GRASSHOPPER_CIPHER_PARAMS {
int nid;
int ctx_size;
int iv_size;
bool padding;
+ int extra_flags;
};
-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}
- ,
+static struct GRASSHOPPER_CIPHER_PARAMS gost_cipher_params[7] = {
+ {
+ NID_grasshopper_ecb,
+ gost_grasshopper_cipher_init_ecb,
+ gost_grasshopper_cipher_do_ecb,
+ NULL,
+ 16,
+ sizeof(gost_grasshopper_cipher_ctx),
+ 0,
+ true,
+ 0
+ },
+ {
+ NID_grasshopper_cbc,
+ gost_grasshopper_cipher_init_cbc,
+ gost_grasshopper_cipher_do_cbc,
+ NULL,
+ 16,
+ sizeof(gost_grasshopper_cipher_ctx),
+ 16,
+ true,
+ 0
+ },
+ {
+ NID_grasshopper_ofb,
+ gost_grasshopper_cipher_init_ofb,
+ gost_grasshopper_cipher_do_ofb,
+ NULL,
+ 1,
+ sizeof(gost_grasshopper_cipher_ctx),
+ 16,
+ false,
+ 0
+ },
+ {
+ NID_grasshopper_cfb,
+ gost_grasshopper_cipher_init_cfb,
+ gost_grasshopper_cipher_do_cfb,
+ NULL,
+ 1,
+ sizeof(gost_grasshopper_cipher_ctx),
+ 16,
+ false,
+ 0
+ },
+ {
+ 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),
+ 8,
+ false,
+ 0
+ },
+ {
+ NID_kuznyechik_ctr_acpkm,
+ gost_grasshopper_cipher_init_ctracpkm,
+ gost_grasshopper_cipher_do_ctracpkm,
+ gost_grasshopper_cipher_destroy_ctr,
+ 1,
+ sizeof(gost_grasshopper_cipher_ctx_ctr),
+ 8,
+ false,
+ 0
+ },
+ {
+ NID_kuznyechik_ctr_acpkm_omac,
+ gost_grasshopper_cipher_init_ctracpkm_omac,
+ gost_grasshopper_cipher_do_ctracpkm_omac,
+ gost_grasshopper_cipher_destroy_ctr,
+ 1,
+ sizeof(gost_grasshopper_cipher_ctx_ctr),
+ 8,
+ false,
+ EVP_CIPH_FLAG_CUSTOM_CIPHER|EVP_CIPH_FLAG_CIPHER_WITH_MAC|EVP_CIPH_CUSTOM_COPY
+ },
};
/* 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) {
+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],
(const grasshopper_w128_t *)(k + i * 16));
}
+
grasshopper_set_encrypt_key(&c->encrypt_round_keys, &c->key);
grasshopper_set_decrypt_key(&c->decrypt_round_keys, &c->key);
}
+/* 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)
+{
+ int i;
+ for (i = 0; i < 2; i++) {
+ grasshopper_copy128(&c->master_key.k.k[i],
+ (const grasshopper_w128_t *)(k + i * 16));
+ }
+}
+
/* Cleans up key from context */
GRASSHOPPER_INLINE void
- gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx * c) {
+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]);
}
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,
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) {
gost_grasshopper_cipher_key(c, key);
+ gost_grasshopper_master_key(c, key);
}
if (iv != 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) {
+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) {
+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);
-
+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) {
+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);
+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);
}
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);
+ *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_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;
+ }
+
+ 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);
+}
+
GRASSHOPPER_INLINE int gost_grasshopper_cipher_do(EVP_CIPHER_CTX *ctx,
unsigned char *out,
const unsigned char *in,
- size_t inl) {
+ 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];
}
int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t inl) {
+ 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);
}
int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t inl) {
+ 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,
currentOutputBlock, &c->buffer);
grasshopper_copy128(currentBlock, currentOutputBlock);
} else {
+ grasshopper_w128_t tmp;
+
+ grasshopper_copy128(&tmp, currentInputBlock);
grasshopper_decrypt_block(&c->decrypt_round_keys,
currentInputBlock, currentOutputBlock,
&c->buffer);
grasshopper_append128(currentOutputBlock, currentBlock);
- grasshopper_copy128(currentBlock, currentInputBlock);
+ grasshopper_copy128(currentBlock, &tmp);
}
}
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 *)
+ 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;
+ iv_buffer = (grasshopper_w128_t *) iv;
// full parts
for (i = 0; i < blocks; i++) {
currentInputBlock = (grasshopper_w128_t *) current_in;
currentOutputBlock = (grasshopper_w128_t *) current_out;
grasshopper_encrypt_block(&c->c.encrypt_round_keys, iv_buffer,
- currentOutputBlock, &c->c.buffer);
- grasshopper_append128(currentOutputBlock, currentInputBlock);
+ &c->partial_buffer, &c->c.buffer);
+ grasshopper_plus128(&tmp, &c->partial_buffer, currentInputBlock);
+ grasshopper_copy128(currentOutputBlock, &tmp);
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);
* 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);
+ 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;
+ 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 *) out, &c->c.buffer);
- grasshopper_append128((grasshopper_w128_t *) out,
- (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;
}
+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 *)
+ 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;
}
int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t inl) {
+ 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) {
+int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX *ctx)
+{
+ struct GRASSHOPPER_CIPHER_PARAMS *params;
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];
+ params = &gost_cipher_params[c->type];
gost_grasshopper_cipher_destroy(c);
if (params->destroy_cipher != 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;
+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;
- }
- OPENSSL_free(buf);
-
- ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
- return 1;
+ return gost2015_set_asn1_params(params, EVP_CIPHER_CTX_original_iv(ctx), 8,
+ ctr->kdf_seed);
+ }
+ return 0;
}
GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX
- *ctx,
- ASN1_TYPE
- *params) {
- int ret = -1;
-
- if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
- return ret;
- }
-
- return 1;
+ *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);
+
+ int iv_len = 16;
+ unsigned char iv[16];
+
+ 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) {
+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
+ 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);
+ static const unsigned char zeroseq[8];
+ 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;
+ 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);
+
+ memcpy(seq, ptr, 8);
+ if (EVP_CIPHER_CTX_encrypting(ctx)) {
+ /*
+ * OpenSSL increments seq after mac calculation.
+ * As we have Mac-Then-Encrypt, we need decrement it here on encryption
+ * to derive the key correctly.
+ * */
+ if (memcmp(seq, zeroseq, 8) != 0)
+ {
+ for(j=7; j>=0; j--)
+ {
+ if (seq[j] != 0) {seq[j]--; break;}
+ else seq[j] = 0xFF;
+ }
+ }
+ }
+ 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;
+#endif
+#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;
+
+ if (taglen > KUZNYECHIK_MAC_MAX_SIZE) {
+ CRYPTOCOMerr(CRYPTOCOM_F_GOST_GRASSHOPPER_CIPHER_CTL,
+ CRYPTOCOM_R_INVALID_TAG_LENGTH);
+ return -1;
+ }
+
+ if (type == EVP_CTRL_AEAD_GET_TAG)
+ memcpy(tag, c->final_tag, taglen);
+ else
+ memcpy(c->final_tag, tag, taglen);
+
+ 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);
+
+ if (c->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC)
+ return -1;
+
+ return gost2015_process_unprotected_attributes(x, arg, KUZNYECHIK_MAC_MAX_SIZE, c->tag);
+ }
+ return 1;
+ case EVP_CTRL_COPY: {
+ EVP_CIPHER_CTX *out = ptr;
+
+ 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);
+
+ if (in_cctx->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC)
+ return -1;
+
+ 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);
+ }
default:
GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
}
GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_create(int
- cipher_type,
- int
- block_size) {
+ cipher_type, int
+ block_size)
+{
return EVP_CIPHER_meth_new(cipher_type, block_size /* block_size */ ,
GRASSHOPPER_KEY_SIZE /* key_size */ );
}
const int cipher_gost_grasshopper_setup(EVP_CIPHER *cipher, uint8_t mode,
- int iv_size, bool padding) {
+ int iv_size, bool padding, int extra_flags)
+{
+ unsigned long flags = (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
+ | extra_flags);
+
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_flags(cipher, flags)
+ && 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);
+ && EVP_CIPHER_meth_set_do_cipher(cipher, gost_grasshopper_cipher_do);
}
const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper(uint8_t mode,
- uint8_t num) {
+ uint8_t num)
+{
EVP_CIPHER **cipher;
struct GRASSHOPPER_CIPHER_PARAMS *params;
cipher = &gost_grasshopper_ciphers[num];
if (*cipher == NULL) {
+ grasshopper_init_cipher_func init_cipher;
+ int nid, block_size, ctx_size, iv_size, extra_flags;
+ bool padding;
+
params = &gost_cipher_params[num];
- 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;
+ nid = params->nid;
+ init_cipher = params->init_cipher;
+ block_size = params->block_size;
+ ctx_size = params->ctx_size;
+ iv_size = params->iv_size;
+ padding = params->padding;
+ extra_flags = params->extra_flags;
*cipher = cipher_gost_grasshopper_create(nid, block_size);
if (*cipher == NULL) {
return NULL;
}
- if (!cipher_gost_grasshopper_setup(*cipher, mode, iv_size, padding)
+ if (!cipher_gost_grasshopper_setup(*cipher, mode, iv_size, padding, extra_flags)
|| !EVP_CIPHER_meth_set_init(*cipher, init_cipher)
|| !EVP_CIPHER_meth_set_impl_ctx_size(*cipher, ctx_size)) {
EVP_CIPHER_meth_free(*cipher);
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_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_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_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_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_ctr()
+{
+ return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, GRASSHOPPER_CIPHER_CTR);
}
-const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctracpkm() {
+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) {
+const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctracpkm_omac()
+{
+ return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE,
+ GRASSHOPPER_CIPHER_CTRACPKMOMAC);
+}
+
+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_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]);
+ EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTRACPKM]);
gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTRACPKM] = NULL;
+ EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTRACPKMOMAC]);
+ gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTRACPKMOMAC] = NULL;
}
-
-#if defined(__cplusplus)
-}
-#endif
projects / openssl-gost / engine.git / blobdiff