* 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 <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/err.h>
+
#include <string.h>
+#include <byteswap.h>
+#include "gost_lcl.h"
#include "e_gost_err.h"
enum GRASSHOPPER_CIPHER_TYPE {
GRASSHOPPER_CIPHER_CBC,
GRASSHOPPER_CIPHER_OFB,
GRASSHOPPER_CIPHER_CFB,
- GRASSHOPPER_CIPHER_CTR
+ GRASSHOPPER_CIPHER_CTR,
+ GRASSHOPPER_CIPHER_CTRACPKM,
+ GRASSHOPPER_CIPHER_MGM,
};
-static EVP_CIPHER* gost_grasshopper_ciphers[5] = {
- [GRASSHOPPER_CIPHER_ECB] = NULL,
- [GRASSHOPPER_CIPHER_CBC] = NULL,
- [GRASSHOPPER_CIPHER_OFB] = NULL,
- [GRASSHOPPER_CIPHER_CFB] = NULL,
- [GRASSHOPPER_CIPHER_CTR] = NULL
+static EVP_CIPHER *gost_grasshopper_ciphers[7] = {
+ [GRASSHOPPER_CIPHER_ECB] = NULL,
+ [GRASSHOPPER_CIPHER_CBC] = NULL,
+ [GRASSHOPPER_CIPHER_OFB] = NULL,
+ [GRASSHOPPER_CIPHER_CFB] = NULL,
+ [GRASSHOPPER_CIPHER_CTR] = NULL,
+ [GRASSHOPPER_CIPHER_CTRACPKM] = NULL,
+ [GRASSHOPPER_CIPHER_MGM] = 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);
+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);
+static GRASSHOPPER_INLINE void
+gost_grasshopper_cipher_destroy_mgm(gost_grasshopper_cipher_ctx * c);
struct GRASSHOPPER_CIPHER_PARAMS {
int nid;
bool padding;
};
-static struct GRASSHOPPER_CIPHER_PARAMS gost_cipher_params[5] = {
- [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),
- 8,
- false
- },
+static struct GRASSHOPPER_CIPHER_PARAMS gost_cipher_params[7] = {
+ [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}
+ ,
+#ifdef NID_kuznyechik_mgm
+ [GRASSHOPPER_CIPHER_MGM] = {
+ NID_kuznyechik_mgm,
+ gost_grasshopper_cipher_init_mgm,
+ gost_grasshopper_cipher_do_mgm,
+ gost_grasshopper_cipher_destroy_mgm,
+ 1,
+ sizeof(gost_grasshopper_cipher_ctx_mgm),
+ 16,
+ false}
+ ,
+#else
+ [GRASSHOPPER_CIPHER_MGM] = {
+ NID_undef,
+ NULL,
+ NULL,
+ NULL,
+ 0,
+ 0,
+ 0,
+ false}
+ ,
+#endif
+};
+
+/* first 256 bit of D from draft-irtf-cfrg-re-keying-12 */
+static const unsigned char ACPKM_D_2018[] = {
+ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 64 bit */
+ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 128 bit */
+ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 256 bit */
};
+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];
+
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) D_n,
+ (grasshopper_w128_t *) & newkey[n *
+ GRASSHOPPER_BLOCK_SIZE],
+ &c->buffer);
+ }
+ gost_grasshopper_cipher_key(c, newkey);
+}
+
/* Set 256 bit key into context */
-static GRASSHOPPER_INLINE void gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx* c, const uint8_t* k) {
- int i;
+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], (const grasshopper_w128_t*) (k + i * 16));
+ 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 */
-static GRASSHOPPER_INLINE void gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx* c) {
- int i;
+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]);
}
for (i = 0; i < GRASSHOPPER_ROUND_KEYS_COUNT; i++) {
grasshopper_zero128(&c->encrypt_round_keys.k[i]);
grasshopper_zero128(&c->buffer);
}
-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;
+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_ctx_ctr* ctx = (gost_grasshopper_cipher_ctx_ctr*) c;
+static GRASSHOPPER_INLINE void
+gost_grasshopper_cipher_destroy_ctr(gost_grasshopper_cipher_ctx * c)
+{
+ gost_grasshopper_cipher_ctx_ctr *ctx =
+ (gost_grasshopper_cipher_ctx_ctr *) c;
- grasshopper_zero128(&ctx->iv_buffer);
grasshopper_zero128(&ctx->partial_buffer);
+}
- ctx->counter = 0;
+static GRASSHOPPER_INLINE void
+gost_grasshopper_cipher_destroy_mgm(gost_grasshopper_cipher_ctx * c)
+{
+ gost_grasshopper_cipher_ctx_mgm *ctx =
+ (gost_grasshopper_cipher_ctx_mgm *) c;
+
+ grasshopper_zero128(&ctx->partial_buffer);
}
-static int gost_grasshopper_cipher_init(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);
+int gost_grasshopper_cipher_init(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);
if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx));
if (key != NULL) {
gost_grasshopper_cipher_key(c, key);
+ gost_grasshopper_master_key(c, key);
}
if (iv != NULL) {
- memcpy((unsigned char*) EVP_CIPHER_CTX_original_iv(ctx), iv,
+ if (c->type == GRASSHOPPER_CIPHER_MGM) {
+ gost_grasshopper_cipher_ctx_mgm *m =
+ (gost_grasshopper_cipher_ctx_mgm *) c;
+
+ /* 1st bit should be 0 */
+ if (iv[0] > 127) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_INIT,
+ GOST_R_INVALID_IV_LENGTH);
+ return 0;
+ }
+ memcpy(m->mgm_iv, iv, 16);
+ *(unsigned char *)(m->mgm_iv) += 128;
+ }
+ 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));
+ EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
grasshopper_zero128(&c->buffer);
return 1;
}
-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);
+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);
}
-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);
+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);
}
-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_ofb* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
+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;
return gost_grasshopper_cipher_init(ctx, key, iv, 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);
+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);
}
-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);
+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_zero128(&c->iv_buffer);
grasshopper_zero128(&c->partial_buffer);
- c->counter = 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);
+
+ /* NB: setting type makes EVP do_cipher callback useless */
+ c->c.type = GRASSHOPPER_CIPHER_CTRACPKM;
+ EVP_CIPHER_CTX_set_num(ctx, 0);
+ c->section_size = 4096;
return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-static 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];
+GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_mgm(EVP_CIPHER_CTX *ctx, const unsigned char
+ *key, const unsigned char
+ *iv, int enc)
+{
+ gost_grasshopper_cipher_ctx_mgm *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
+
+ c->c.type = GRASSHOPPER_CIPHER_MGM;
+ c->taglen = 16;
+ EVP_CIPHER_CTX_set_num(ctx, 0);
+
+ grasshopper_zero128(&c->partial_buffer);
+
+ 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];
return params->do_cipher(ctx, out, in, 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);
+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);
- const unsigned char* current_in = in;
- unsigned char* current_out = out;
+ const unsigned char *current_in = in;
+ unsigned char *current_out = out;
size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
size_t i;
- for (i = 0; i < blocks; i++, current_in += GRASSHOPPER_BLOCK_SIZE, current_out += GRASSHOPPER_BLOCK_SIZE) {
+ for (i = 0; i < blocks;
+ i++, current_in += GRASSHOPPER_BLOCK_SIZE, current_out +=
+ GRASSHOPPER_BLOCK_SIZE) {
if (encrypting) {
- grasshopper_encrypt_block(&c->encrypt_round_keys, (grasshopper_w128_t*) current_in,
- (grasshopper_w128_t*) current_out,
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) current_in,
+ (grasshopper_w128_t *) current_out,
&c->buffer);
} else {
- grasshopper_decrypt_block(&c->decrypt_round_keys, (grasshopper_w128_t*) current_in,
- (grasshopper_w128_t*) current_out,
+ grasshopper_decrypt_block(&c->decrypt_round_keys,
+ (grasshopper_w128_t *) current_in,
+ (grasshopper_w128_t *) current_out,
&c->buffer);
}
}
return 1;
}
-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);
+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;
+ 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;
+ grasshopper_w128_t *currentBlock;
- currentBlock = (grasshopper_w128_t*) iv;
+ currentBlock = (grasshopper_w128_t *) iv;
- 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;
+ 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;
if (encrypting) {
grasshopper_append128(currentBlock, currentInputBlock);
- grasshopper_encrypt_block(&c->encrypt_round_keys, currentBlock, currentOutputBlock, &c->buffer);
+ grasshopper_encrypt_block(&c->encrypt_round_keys, currentBlock,
+ currentOutputBlock, &c->buffer);
grasshopper_copy128(currentBlock, currentOutputBlock);
} else {
- grasshopper_decrypt_block(&c->decrypt_round_keys, currentInputBlock, currentOutputBlock, &c->buffer);
+ 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;
+ unsigned int n = counter_bytes;
+
+ do {
+ --n;
+ c = counter[n];
+ ++c;
+ counter[n] = c;
+ if (c)
+ return;
+ } while (n);
+}
+
+/* increment counter (128-bit int) by 1 */
+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 *)
+ EVP_CIPHER_CTX_get_cipher_data(ctx);
+ unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
+ const unsigned char *current_in = in;
+ unsigned char *current_out = out;
+ grasshopper_w128_t *currentInputBlock;
+ grasshopper_w128_t *currentOutputBlock;
+ unsigned int n = EVP_CIPHER_CTX_num(ctx);
+ size_t lasted;
+ size_t i;
+
+ while (n && inl) {
+ *(current_out++) = *(current_in++) ^ c->partial_buffer.b[n];
+ --inl;
+ n = (n + 1) % GRASSHOPPER_BLOCK_SIZE;
+ }
+ EVP_CIPHER_CTX_set_num(ctx, n);
+ size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
+
+ grasshopper_w128_t *iv_buffer = (grasshopper_w128_t *) iv;
+ grasshopper_w128_t tmp;
+
+ // 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,
+ &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;
+ }
+
+ // last part
+ lasted = inl - blocks * GRASSHOPPER_BLOCK_SIZE;
+ if (lasted > 0) {
+ currentInputBlock = (grasshopper_w128_t *) current_in;
+ currentOutputBlock = (grasshopper_w128_t *) current_out;
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, iv_buffer,
+ &c->partial_buffer, &c->c.buffer);
+ for (i = 0; i < lasted; i++) {
+ currentOutputBlock->b[i] =
+ c->partial_buffer.b[i] ^ currentInputBlock->b[i];
}
+ EVP_CIPHER_CTX_set_num(ctx, i);
+ ctr128_inc(iv_buffer->b);
}
return 1;
}
-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;
- unsigned char* current_out = out;
+#define GRASSHOPPER_BLOCK_MASK (GRASSHOPPER_BLOCK_SIZE - 1)
+static inline void apply_acpkm_grasshopper(gost_grasshopper_cipher_ctx_ctr *
+ ctx, unsigned int *num)
+{
+ if (!ctx->section_size || (*num < ctx->section_size))
+ return;
+ acpkm_next(&ctx->c);
+ *num &= GRASSHOPPER_BLOCK_MASK;
+}
+
+/* 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);
+ unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
+ unsigned int num = EVP_CIPHER_CTX_num(ctx);
+
+ while ((num & GRASSHOPPER_BLOCK_MASK) && inl) {
+ *out++ = *in++ ^ c->partial_buffer.b[num & GRASSHOPPER_BLOCK_MASK];
+ --inl;
+ num++;
+ }
size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
- grasshopper_w128_t* currentInputBlock;
- grasshopper_w128_t* currentOutputBlock;
+ size_t i;
+ grasshopper_w128_t tmp;
+
+ // 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_copy128((grasshopper_w128_t *) out, &tmp);
+ ctr128_inc(iv);
+ in += GRASSHOPPER_BLOCK_SIZE;
+ out += GRASSHOPPER_BLOCK_SIZE;
+ num += 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,
+ (grasshopper_w128_t *) iv,
+ &c->partial_buffer, &c->c.buffer);
+ for (i = 0; i < lasted; i++)
+ out[i] = c->partial_buffer.b[i] ^ in[i];
+ ctr128_inc(iv);
+ num += lasted;
+ }
+ EVP_CIPHER_CTX_set_num(ctx, num);
+
+ return 1;
+}
+
+/* ----------------------------------------------------------------------------------------------- */
+/*! Функция реализует операцию умножения двух элементов конечного поля \f$ \mathbb F_{2^{128}}\f$,
+ порожденного неприводимым многочленом
+ \f$ f(x) = x^{128} + x^7 + x^2 + x + 1 \in \mathbb F_2[x]\f$. Для умножения используется
+ простейшая реализация, основанная на приведении по модулю после каждого шага алгоритма. */
+/* ----------------------------------------------------------------------------------------------- */
+static void gf128_mul_uint64(uint64_t *result, uint64_t *arg1, uint64_t *arg2)
+{
+ int i = 0, n = 0;
+ uint64_t t, s0, s1;
+ uint64_t x[2], y[2], z[2];
+
+ BUF_reverse((unsigned char *)x, (unsigned char *)arg1, 16);
+ BUF_reverse((unsigned char *)y, (unsigned char *)arg2, 16);
+
+#ifdef L_ENDIAN
+ s0 = x[0];
+ s1 = x[1];
+#else
+ s0 = bswap_64(x[0]);
+ s1 = bswap_64(x[1]);
+#endif
+
+ memset(z, 0, sizeof(uint64_t) * 2);
+
+ /* lower half */
+#ifdef L_ENDIAN
+ t = y[0];
+#else
+ t = bswap_64(y[0]);
+#endif
+
+ for (i = 0; i < 64; i++) {
+ if (t & 0x1) {
+ z[0] ^= s0;
+ z[1] ^= s1;
+ }
+ t >>= 1;
+ n = s1 >> 63;
+ s1 <<= 1;
+ s1 ^= (s0 >> 63);
+ s0 <<= 1;
+ if (n)
+ s0 ^= 0x87;
+ }
+
+ /* upper half */
+#ifdef L_ENDIAN
+ t = y[1];
+#else
+ t = bswap_64(y[1]);
+#endif
+
+ for (i = 0; i < 63; i++) {
+ if (t & 0x1) {
+ z[0] ^= s0;
+ z[1] ^= s1;
+ }
+ t >>= 1;
+ n = s1 >> 63;
+ s1 <<= 1;
+ s1 ^= (s0 >> 63);
+ s0 <<= 1;
+ if (n)
+ s0 ^= 0x87;
+ }
+
+ if (t & 0x1) {
+ z[0] ^= s0;
+ z[1] ^= s1;
+ }
+#ifndef L_ENDIAN
+ z[0] = bswap_64(z[0]);
+ z[1] = bswap_64(z[1]);
+#endif
+ BUF_reverse((unsigned char *)result, (unsigned char *)z, 16);
+}
+
+static void hexdump(FILE *f, const char *title, const unsigned char *s, int l)
+{
+ int n = 0;
+
+ fprintf(f, "%s", title);
+ for (; n < l; ++n) {
+ if ((n % 16) == 0)
+ fprintf(f, "\n%04x", n);
+ fprintf(f, " %02x", s[n]);
+ }
+ fprintf(f, "\n");
+}
+
+int gost_grasshopper_cipher_do_mgm(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ gost_grasshopper_cipher_ctx_mgm *c = (gost_grasshopper_cipher_ctx_mgm *)
+ EVP_CIPHER_CTX_get_cipher_data(ctx);
+ unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
+ const unsigned char *current_in = in;
+ unsigned char *current_out = out;
+ grasshopper_w128_t *currentInputBlock;
+ grasshopper_w128_t *currentOutputBlock;
+ unsigned int n = EVP_CIPHER_CTX_num(ctx);
size_t lasted;
- size_t i;
+ size_t i;
+
+ size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
+ int rest_len = n % GRASSHOPPER_BLOCK_SIZE;
+ grasshopper_w128_t h;
+
+ grasshopper_w128_t *iv_buffer = (grasshopper_w128_t *) iv;
+ grasshopper_w128_t tmp;
+ int encrypting = EVP_CIPHER_CTX_encrypting(ctx);
+
+/* ======== Here we deal with associated data =========== */
+ if (out == NULL && c->mgm_state == mgm_associated_data) {
+ if (n == 0) {
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, c->mgm_iv,
+ &c->partial_buffer, &c->c.buffer);
+ memcpy(c->mgm_iv, &c->partial_buffer, GRASSHOPPER_BLOCK_SIZE);
+ hexdump(stderr, "Tag", c->tag, 16);
+ }
+
+ if (rest_len != 0) {
+ /* Finalize partial_data */
+ if (inl + rest_len < GRASSHOPPER_BLOCK_SIZE) {
+ memcpy(c->mgm_partial_buffer.b + rest_len, current_in, inl);
+ n += inl;
+ EVP_CIPHER_CTX_set_num(ctx, n);
+ return 1;
+ } else {
+ memcpy(c->mgm_partial_buffer.b + rest_len, current_in,
+ GRASSHOPPER_BLOCK_SIZE - rest_len);
+
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, c->mgm_iv,
+ &h, &c->c.buffer);
+ inc_counter(c->mgm_iv->b, 8);
+
+ hexdump(stderr, "Hnext", h.b, 16);
+ hexdump(stderr, "Adata", c->mgm_partial_buffer.b, 16);
+ /* Galois multiply Hi * Ai */
+ gf128_mul_uint64(tmp.q, h.q, c->mgm_partial_buffer.q);
+
+ /* XOR to c->tag */
+ grasshopper_plus128(&h, (grasshopper_w128_t *) c->tag, &tmp);
+ grasshopper_copy128((grasshopper_w128_t *) c->tag, &h);
+ hexdump(stderr, "Tag", c->tag, 16);
+
+ current_in += GRASSHOPPER_BLOCK_SIZE - rest_len;
+ inl -= (GRASSHOPPER_BLOCK_SIZE - rest_len);
+ n += GRASSHOPPER_BLOCK_SIZE - rest_len;
+ }
+ }
- memcpy(&c->iv_buffer, iv, 8);
+ while (inl >= GRASSHOPPER_BLOCK_SIZE) {
+ currentInputBlock = (grasshopper_w128_t *) current_in;
+
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, c->mgm_iv,
+ &h, &c->c.buffer);
+ inc_counter(c->mgm_iv->b, 8);
+
+ hexdump(stderr, "Hnext", h.b, 16);
+ hexdump(stderr, "Adata", currentInputBlock->b, 16);
+ /* Galois multiply */
+ gf128_mul_uint64(tmp.q, h.q, currentInputBlock->q);
+
+ /* XOR to c->tag */
+ grasshopper_plus128(&h, (grasshopper_w128_t *) c->tag, &tmp);
+ grasshopper_copy128((grasshopper_w128_t *) c->tag, &h);
+ hexdump(stderr, "Tag", c->tag, 16);
+
+ current_in += GRASSHOPPER_BLOCK_SIZE;
+ inl -= GRASSHOPPER_BLOCK_SIZE;
+ n += GRASSHOPPER_BLOCK_SIZE;
+ }
+
+ if (inl > 0) {
+ memcpy(c->mgm_partial_buffer.b, current_in, inl);
+ n += inl;
+ }
+
+ EVP_CIPHER_CTX_set_num(ctx, n);
+ return 1;
+ }
+
+ if (out == NULL && in != NULL && inl != 0 && c->mgm_state == mgm_main_data) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_DO_MGM, GOST_R_BAD_ORDER);
+ return 0;
+ }
+
+ if (out != NULL && c->mgm_state == mgm_associated_data) {
+ memset(c->mgm_partial_buffer.b + rest_len, 0,
+ GRASSHOPPER_BLOCK_SIZE - rest_len);
+
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, c->mgm_iv,
+ &h, &c->c.buffer);
+ inc_counter(c->mgm_iv->b, 8);
+
+ hexdump(stderr, "Hnext", h.b, 16);
+ hexdump(stderr, "Padded Adata", c->mgm_partial_buffer.b, 16);
+ /* Galois multiply Hi * Ai */
+ gf128_mul_uint64(tmp.q, h.q, c->mgm_partial_buffer.q);
+
+ /* XOR to c->tag */
+ grasshopper_plus128(&h, (grasshopper_w128_t *) c->tag, &tmp);
+ grasshopper_copy128((grasshopper_w128_t *) c->tag, &h);
+ hexdump(stderr, "Tag", c->tag, 16);
+
+ /* We finish processing associated data */
+ /* Pad rest of mgm_partial_buffer */
+ /* Process last block */
+ c->ad_length = n;
+ n = 0;
+ rest_len = 0;
+ EVP_CIPHER_CTX_set_num(ctx, 0);
+ c->mgm_state = mgm_main_data;
+
+ fprintf(stderr, "============= Deal with main data\n");
+ }
+
+/* ======== Here we deal with main data =========== */
+ if (n == 0) {
+ /* actual IV derived from nonce */
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, iv_buffer,
+ &c->partial_buffer, &c->c.buffer);
+ memcpy(iv, c->partial_buffer.b, GRASSHOPPER_BLOCK_SIZE);
+ //hexdump(stderr, "Y1", iv, 16);
+ }
+
+ while (rest_len && inl) {
+ *(current_out++) = *(current_in++) ^ c->partial_buffer.b[rest_len];
+
+ if (encrypting)
+ c->partial_buffer.b[rest_len] = *(current_out - 1);
+ else
+ c->partial_buffer.b[rest_len] = *(current_in - 1);
+
+ --inl;
+ n++;
+ rest_len++;
+ if (rest_len == GRASSHOPPER_BLOCK_SIZE) {
+ rest_len = 0;
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, c->mgm_iv,
+ &h, &c->c.buffer);
+ inc_counter(c->mgm_iv->b, 8);
+ hexdump(stderr, "Hnext", h.b, 16);
+ hexdump(stderr, "Ciphertext", c->partial_buffer.b, 16);
+ /* Galois multiply Hi * Ai */
+ gf128_mul_uint64(tmp.q, h.q, c->partial_buffer.q);
+
+ /* XOR to c->tag */
+ grasshopper_plus128(&h, (grasshopper_w128_t *) c->tag, &tmp);
+ grasshopper_copy128((grasshopper_w128_t *) c->tag, &h);
+ hexdump(stderr, "Tag", c->tag, 16);
+ }
+ }
// full parts
- 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;
- memcpy(c->iv_buffer.b + 8, &c->counter, 8);
- grasshopper_encrypt_block(&c->c.encrypt_round_keys, &c->iv_buffer, currentOutputBlock, &c->c.buffer);
- grasshopper_append128(currentOutputBlock, currentInputBlock);
- c->counter += 1;
+ for (i = 0; i < blocks; i++) {
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, c->mgm_iv,
+ &h, &c->c.buffer);
+ inc_counter(c->mgm_iv->b, 8);
+
+ currentInputBlock = (grasshopper_w128_t *) current_in;
+ currentOutputBlock = (grasshopper_w128_t *) current_out;
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, iv_buffer,
+ &c->partial_buffer, &c->c.buffer);
+ grasshopper_plus128(&tmp, &c->partial_buffer, currentInputBlock);
+
+ if (encrypting) {
+ grasshopper_copy128(currentOutputBlock, &tmp);
+
+ hexdump(stderr, "Hnext", h.b, 16);
+ hexdump(stderr, "Ciphertext", currentOutputBlock->b, 16);
+ /* Galois multiply Hi * Ai */
+ gf128_mul_uint64(tmp.q, h.q, currentOutputBlock->q);
+
+ /* XOR to c->tag */
+ grasshopper_plus128(&h, (grasshopper_w128_t *) c->tag, &tmp);
+ grasshopper_copy128((grasshopper_w128_t *) c->tag, &h);
+ hexdump(stderr, "Tag", c->tag, 16);
+ } else {
+ grasshopper_w128_t tmpin;
+ grasshopper_copy128(&tmpin, currentInputBlock);
+ grasshopper_copy128(currentOutputBlock, &tmp);
+
+ hexdump(stderr, "Hnext", h.b, 16);
+ hexdump(stderr, "Ciphertext", tmpin.b, 16);
+ /* Galois multiply Hi * Ai */
+ gf128_mul_uint64(tmp.q, h.q, tmpin.q);
+
+ /* XOR to c->tag */
+ grasshopper_plus128(&h, (grasshopper_w128_t *) c->tag, &tmp);
+ grasshopper_copy128((grasshopper_w128_t *) c->tag, &h);
+ hexdump(stderr, "Tag", c->tag, 16);
+ }
+
+ ctr128_inc(iv_buffer->b);
+ current_in += GRASSHOPPER_BLOCK_SIZE;
+ current_out += GRASSHOPPER_BLOCK_SIZE;
+ n += GRASSHOPPER_BLOCK_SIZE;
}
+ EVP_CIPHER_CTX_set_num(ctx, n);
+
// last part
lasted = inl - blocks * GRASSHOPPER_BLOCK_SIZE;
if (lasted > 0) {
- currentInputBlock = (grasshopper_w128_t*) current_in;
- currentOutputBlock = (grasshopper_w128_t*) current_out;
- memcpy(c->iv_buffer.b + 8, &c->counter, 8);
- grasshopper_encrypt_block(&c->c.encrypt_round_keys, &c->iv_buffer, &c->partial_buffer, &c->c.buffer);
+ currentInputBlock = (grasshopper_w128_t *) current_in;
+ currentOutputBlock = (grasshopper_w128_t *) current_out;
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, iv_buffer,
+ &c->partial_buffer, &c->c.buffer);
for (i = 0; i < lasted; i++) {
- currentOutputBlock->b[i] = c->partial_buffer.b[i] ^ currentInputBlock->b[i];
+ if (encrypting) {
+ currentOutputBlock->b[i] =
+ c->partial_buffer.b[i] ^ currentInputBlock->b[i];
+ c->partial_buffer.b[i] = currentOutputBlock->b[i];
+ } else {
+ unsigned char in = currentInputBlock->b[i];
+ currentOutputBlock->b[i] =
+ c->partial_buffer.b[i] ^ currentInputBlock->b[i];
+ c->partial_buffer.b[i] = in;
+ }
+ }
+ EVP_CIPHER_CTX_set_num(ctx, n + i);
+ ctr128_inc(iv_buffer->b);
+ }
+
+ /* Final step */
+ if (in == NULL && inl == 0) {
+ unsigned char len_buf[16];
+ uint64_t a_len = 0, p_len = 0;
+
+ if (rest_len != 0) {
+ memset(c->partial_buffer.b + rest_len, 0,
+ GRASSHOPPER_BLOCK_SIZE - rest_len);
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, c->mgm_iv, &h,
+ &c->c.buffer);
+ inc_counter(c->mgm_iv->b, 8);
+ hexdump(stderr, "Hnext", h.b, 16);
+ hexdump(stderr, "Padded ciphertext", c->partial_buffer.b, 16);
+ /* Galois multiply Hi * Ai */
+ gf128_mul_uint64(tmp.q, h.q, c->partial_buffer.q);
+
+ /* XOR to c->tag */
+ grasshopper_plus128(&h, (grasshopper_w128_t *) c->tag, &tmp);
+ grasshopper_copy128((grasshopper_w128_t *) c->tag, &h);
+ hexdump(stderr, "Tag", c->tag, 16);
+ }
+
+ a_len = c->ad_length << 3;
+ p_len = (c->mgm_state == mgm_associated_data) ? 0 : n << 3;
+
+#ifdef L_ENDIAN
+ a_len = bswap_64(a_len);
+ p_len = bswap_64(p_len);
+#endif
+ memset(len_buf, 0, 16);
+
+ memcpy(len_buf, &a_len, sizeof(a_len));
+ memcpy(len_buf + sizeof(a_len), &p_len, sizeof(p_len));
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, c->mgm_iv,
+ &h, &c->c.buffer);
+
+ hexdump(stderr, "Hlast", h.b, 16);
+ hexdump(stderr, "Lenbuf", len_buf, 16);
+ /* Galois multiply Hi * Ai */
+ gf128_mul_uint64(tmp.q, h.q, (uint64_t *)len_buf);
+
+ /* XOR to c->tag */
+ grasshopper_plus128(&h, (grasshopper_w128_t *) c->tag, &tmp);
+ grasshopper_copy128((grasshopper_w128_t *) c->tag, &h);
+ hexdump(stderr, "Tag", c->tag, 16);
+
+ /* Final tag calculation */
+ if (encrypting) {
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys,
+ (grasshopper_w128_t *) c->tag,
+ (grasshopper_w128_t *) c->final_tag,
+ &c->c.buffer);
+ return 1;
+ } else {
+ grasshopper_w128_t decrypt_tag;
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys,
+ (grasshopper_w128_t *) c->tag,
+ &decrypt_tag, &c->c.buffer);
+ if (memcmp(decrypt_tag.b, c->final_tag, 16)) {
+ hexdump(stderr, "Bad final tag", decrypt_tag.b, 16);
+ return 0;
+ } else
+ return 1;
}
- c->counter += 1;
}
return 1;
}
-static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx_ofb* ctx, grasshopper_w128_t* iv,
- grasshopper_w128_t* buf) {
+/*
+ * Fixed 128-bit IV implementation make shift regiser redundant.
+ */
+static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx_ofb * ctx,
+ grasshopper_w128_t * iv,
+ grasshopper_w128_t * buf)
+{
memcpy(&ctx->buffer1, iv, 16);
- ctx->g = ctx->buffer1.b[0] | (ctx->buffer1.b[1] << 8) | (ctx->buffer1.b[2] << 16) |
- ((uint32_t) ctx->buffer1.b[3] << 24);
- ctx->g += 0x01010101;
- ctx->buffer1.b[0] = (unsigned char) (ctx->g & 0xff);
- ctx->buffer1.b[1] = (unsigned char) ((ctx->g >> 8) & 0xff);
- ctx->buffer1.b[2] = (unsigned char) ((ctx->g >> 16) & 0xff);
- ctx->buffer1.b[3] = (unsigned char) ((ctx->g >> 24) & 0xff);
- ctx->g = ctx->buffer1.b[4] | (ctx->buffer1.b[5] << 8) | (ctx->buffer1.b[6] << 16) |
- ((uint32_t) ctx->buffer1.b[7] << 24);
- ctx->go = ctx->g;
- ctx->g += 0x01010104;
- if (ctx->go > ctx->g) { /* overflow */
- ctx->g++;
- }
- ctx->buffer1.b[4] = (unsigned char) (ctx->g & 0xff);
- ctx->buffer1.b[5] = (unsigned char) ((ctx->g >> 8) & 0xff);
- ctx->buffer1.b[6] = (unsigned char) ((ctx->g >> 16) & 0xff);
- ctx->buffer1.b[7] = (unsigned char) ((ctx->g >> 24) & 0xff);
- ctx->g = ctx->buffer1.b[8] | (ctx->buffer1.b[9] << 8) | (ctx->buffer1.b[10] << 16) |
- ((uint32_t) ctx->buffer1.b[11] << 24);
- ctx->go = ctx->g;
- ctx->g += 0x01010107;
- if (ctx->go > ctx->g) { /* overflow */
- ctx->g++;
- }
- ctx->buffer1.b[8] = (unsigned char) (ctx->g & 0xff);
- ctx->buffer1.b[9] = (unsigned char) ((ctx->g >> 8) & 0xff);
- ctx->buffer1.b[10] = (unsigned char) ((ctx->g >> 16) & 0xff);
- ctx->buffer1.b[11] = (unsigned char) ((ctx->g >> 24) & 0xff);
- ctx->g = ctx->buffer1.b[12] | (ctx->buffer1.b[13] << 8) | (ctx->buffer1.b[14] << 16) |
- ((uint32_t) ctx->buffer1.b[15] << 24);
- ctx->go = ctx->g;
- ctx->g += 0x01010110;
- if (ctx->go > ctx->g) { /* overflow */
- ctx->g++;
- }
- ctx->buffer1.b[12] = (unsigned char) (ctx->g & 0xff);
- ctx->buffer1.b[13] = (unsigned char) ((ctx->g >> 8) & 0xff);
- ctx->buffer1.b[14] = (unsigned char) ((ctx->g >> 16) & 0xff);
- ctx->buffer1.b[15] = (unsigned char) ((ctx->g >> 24) & 0xff);
- memcpy(iv, &ctx->buffer1, 16);
- grasshopper_encrypt_block(&ctx->c.encrypt_round_keys, &ctx->buffer1, buf, &ctx->c.buffer);
-}
-
-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_ofb* c = (gost_grasshopper_cipher_ctx_ofb*) EVP_CIPHER_CTX_get_cipher_data(ctx);
- const unsigned char* in_ptr = in;
- unsigned char* out_ptr = out;
- unsigned char* buf = EVP_CIPHER_CTX_buf_noconst(ctx);
- unsigned char* iv = EVP_CIPHER_CTX_iv_noconst(ctx);
+ grasshopper_encrypt_block(&ctx->c.encrypt_round_keys, &ctx->buffer1,
+ buf, &ctx->c.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 *)
+ EVP_CIPHER_CTX_get_cipher_data(ctx);
+ const unsigned char *in_ptr = in;
+ unsigned char *out_ptr = out;
+ unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
+ unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
int num = EVP_CIPHER_CTX_num(ctx);
size_t i = 0;
size_t j;
/* process partial block if any */
if (num > 0) {
- for (j = (size_t) num, i = 0; j < GRASSHOPPER_BLOCK_SIZE && i < inl;
+ for (j = (size_t)num, i = 0; j < GRASSHOPPER_BLOCK_SIZE && i < inl;
j++, i++, in_ptr++, out_ptr++) {
*out_ptr = buf[j] ^ (*in_ptr);
}
if (j == GRASSHOPPER_BLOCK_SIZE) {
EVP_CIPHER_CTX_set_num(ctx, 0);
} else {
- EVP_CIPHER_CTX_set_num(ctx, (int) j);
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
return 1;
}
}
for (; i + GRASSHOPPER_BLOCK_SIZE <
- inl; i += GRASSHOPPER_BLOCK_SIZE, in_ptr += GRASSHOPPER_BLOCK_SIZE, out_ptr += GRASSHOPPER_BLOCK_SIZE) {
+ inl;
+ i += GRASSHOPPER_BLOCK_SIZE, in_ptr +=
+ GRASSHOPPER_BLOCK_SIZE, out_ptr += GRASSHOPPER_BLOCK_SIZE) {
/*
* block cipher current iv
*/
/* Encrypt */
- gost_grasshopper_cnt_next(c, (grasshopper_w128_t*) iv, (grasshopper_w128_t*) buf);
+ gost_grasshopper_cnt_next(c, (grasshopper_w128_t *) iv,
+ (grasshopper_w128_t *) buf);
/*
* xor next block of input text with it and output it
/* Process rest of buffer */
if (i < inl) {
- gost_grasshopper_cnt_next(c, (grasshopper_w128_t*) iv, (grasshopper_w128_t*) buf);
+ gost_grasshopper_cnt_next(c, (grasshopper_w128_t *) iv,
+ (grasshopper_w128_t *) buf);
for (j = 0; i < inl; j++, i++) {
out_ptr[j] = buf[j] ^ in_ptr[j];
}
- EVP_CIPHER_CTX_set_num(ctx, (int) j);
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
} else {
EVP_CIPHER_CTX_set_num(ctx, 0);
}
return 1;
}
-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;
- unsigned char* out_ptr = out;
- unsigned char* buf = EVP_CIPHER_CTX_buf_noconst(ctx);
- unsigned char* iv = EVP_CIPHER_CTX_iv_noconst(ctx);
+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;
+ unsigned char *out_ptr = out;
+ unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
+ unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
bool encrypting = (bool) EVP_CIPHER_CTX_encrypting(ctx);
int num = EVP_CIPHER_CTX_num(ctx);
size_t i = 0;
/* process partial block if any */
if (num > 0) {
- for (j = (size_t) num, i = 0; j < GRASSHOPPER_BLOCK_SIZE && i < inl; j++, i++, in_ptr++, out_ptr++) {
+ for (j = (size_t)num, i = 0; j < GRASSHOPPER_BLOCK_SIZE && i < inl;
+ j++, i++, in_ptr++, out_ptr++) {
if (!encrypting) {
buf[j + GRASSHOPPER_BLOCK_SIZE] = *in_ptr;
}
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);
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
return 1;
}
}
for (; i + GRASSHOPPER_BLOCK_SIZE <
- inl; i += GRASSHOPPER_BLOCK_SIZE, in_ptr += GRASSHOPPER_BLOCK_SIZE, out_ptr += GRASSHOPPER_BLOCK_SIZE) {
+ inl;
+ i += GRASSHOPPER_BLOCK_SIZE, in_ptr +=
+ GRASSHOPPER_BLOCK_SIZE, out_ptr += GRASSHOPPER_BLOCK_SIZE) {
/*
* block cipher current iv
*/
- grasshopper_encrypt_block(&c->encrypt_round_keys, (grasshopper_w128_t*) iv, (grasshopper_w128_t*) buf,
- &c->buffer);
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) iv,
+ (grasshopper_w128_t *) buf, &c->buffer);
/*
* xor next block of input text with it and output it
*/
/* Process rest of buffer */
if (i < inl) {
- grasshopper_encrypt_block(&c->encrypt_round_keys, (grasshopper_w128_t*) iv, (grasshopper_w128_t*) buf,
- &c->buffer);
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) iv,
+ (grasshopper_w128_t *) buf, &c->buffer);
if (!encrypting) {
memcpy(buf + GRASSHOPPER_BLOCK_SIZE, 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, (int) j);
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
if (encrypting) {
memcpy(buf + GRASSHOPPER_BLOCK_SIZE, out_ptr, j);
}
return 1;
}
-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);
- struct GRASSHOPPER_CIPHER_PARAMS* params = &gost_cipher_params[c->type];
+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) {
return 1;
}
-static int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) {
+int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params)
+{
int len = 0;
- unsigned char* buf = NULL;
- unsigned char* p = NULL;
- ASN1_OCTET_STRING* os = NULL;
+ unsigned char *buf = NULL;
+ ASN1_OCTET_STRING *os = NULL;
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);
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_SET_ASN1_PARAMETERS,
+ ERR_R_MALLOC_FAILURE);
return 0;
}
OPENSSL_free(buf);
return 1;
}
-static GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) {
+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 1;
}
-static 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_CIPHER_CTL, GOST_R_RNG_ERROR);
+ 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);
return -1;
}
break;
}
- default:
- GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
- return -1;
+ 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))
+ 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;
+ 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; j >= 0; j--) {
+ int adj_byte, carry = 0;
+ 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
+ case EVP_CTRL_AEAD_GET_TAG:
+ case EVP_CTRL_AEAD_SET_TAG:
+ {
+ gost_grasshopper_cipher_ctx_mgm *mgm_ctx = NULL;
+ gost_grasshopper_cipher_ctx *c = NULL;
+ int taglen = arg;
+ unsigned char *tag = ptr;
+
+ mgm_ctx = (gost_grasshopper_cipher_ctx_mgm *)
+ EVP_CIPHER_CTX_get_cipher_data(ctx);
+ c = (gost_grasshopper_cipher_ctx *) mgm_ctx;
+
+ if (c->type != GRASSHOPPER_CIPHER_MGM)
+ return -1;
+
+ if (taglen > 16) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
+ GOST_R_INVALID_TAG_LENGTH);
+ return -1;
+ }
+
+ if (type == EVP_CTRL_AEAD_GET_TAG)
+ memcpy(tag, mgm_ctx->final_tag, taglen);
+ else
+ memcpy(mgm_ctx->final_tag, tag, taglen);
+
+ return 1;
+ }
+ default:
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
+ GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
+ return -1;
}
return 1;
}
-static 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 */);
+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 */ );
}
-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);
+const int cipher_gost_grasshopper_setup(EVP_CIPHER *cipher, uint8_t mode,
+ int iv_size, bool padding,
+ int 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 |
+ extra_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);
}
-static const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper(uint8_t mode, uint8_t num) {
- EVP_CIPHER** cipher;
- struct GRASSHOPPER_CIPHER_PARAMS* params;
+const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper(uint8_t mode,
+ uint8_t num)
+{
+ EVP_CIPHER **cipher;
+ struct GRASSHOPPER_CIPHER_PARAMS *params;
cipher = &gost_grasshopper_ciphers[num];
int iv_size = params->iv_size;
bool padding = params->padding;
+ int extra_flags = (num == GRASSHOPPER_CIPHER_MGM) ?
+ EVP_CIPH_FLAG_CUSTOM_CIPHER | EVP_CIPH_FLAG_AEAD_CIPHER : 0;
+
*cipher = cipher_gost_grasshopper_create(nid, block_size);
if (*cipher == NULL) {
return NULL;
}
- 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)) {
+ 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);
*cipher = NULL;
}
return *cipher;
}
-const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_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() {
+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() {
+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() {
+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() {
+const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctr()
+{
return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, GRASSHOPPER_CIPHER_CTR);
}
-#if defined(__cplusplus)
+const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctracpkm()
+{
+ return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE,
+ GRASSHOPPER_CIPHER_CTRACPKM);
}
+
+const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_mgm()
+{
+#ifndef NID_kuznyechik_mgm
+ return NULL;
+#else
+ return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, GRASSHOPPER_CIPHER_MGM);
#endif
+}
+
+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;
+ EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_MGM]);
+ gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_MGM] = NULL;
+}
projects / openssl-gost / engine.git / blobdiff