#include "gost_lcl.h"
#include "e_gost_err.h"
- enum GRASSHOPPER_CIPHER_TYPE {
- GRASSHOPPER_CIPHER_ECB = 0,
- GRASSHOPPER_CIPHER_CBC,
- GRASSHOPPER_CIPHER_OFB,
- GRASSHOPPER_CIPHER_CFB,
- GRASSHOPPER_CIPHER_CTR,
- GRASSHOPPER_CIPHER_CTRACPKM,
- };
-
- 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 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;
- };
-
- 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}
- ,
- };
+enum GRASSHOPPER_CIPHER_TYPE {
+ GRASSHOPPER_CIPHER_ECB = 0,
+ GRASSHOPPER_CIPHER_CBC,
+ GRASSHOPPER_CIPHER_OFB,
+ GRASSHOPPER_CIPHER_CFB,
+ GRASSHOPPER_CIPHER_CTR,
+ GRASSHOPPER_CIPHER_CTRACPKM,
+};
+
+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 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;
+};
+
+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}
+ ,
+};
/* 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);
- }
+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 */
- 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_set_encrypt_key(&c->encrypt_round_keys, &c->key);
- grasshopper_set_decrypt_key(&c->decrypt_round_keys, &c->key);
- }
+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_set_encrypt_key(&c->encrypt_round_keys, &c->key);
+ grasshopper_set_decrypt_key(&c->decrypt_round_keys, &c->key);
+}
/* Cleans up key from context */
- 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]);
- }
- for (i = 0; i < GRASSHOPPER_ROUND_KEYS_COUNT; i++) {
- grasshopper_zero128(&c->encrypt_round_keys.k[i]);
- }
- for (i = 0; i < GRASSHOPPER_ROUND_KEYS_COUNT; i++) {
- grasshopper_zero128(&c->decrypt_round_keys.k[i]);
- }
- grasshopper_zero128(&c->buffer);
+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]);
}
-
- 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);
+ 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_ctr(gost_grasshopper_cipher_ctx * c) {
- gost_grasshopper_cipher_ctx_ctr *ctx =
- (gost_grasshopper_cipher_ctx_ctr *) c;
-
- grasshopper_zero128(&ctx->partial_buffer);
+ for (i = 0; i < GRASSHOPPER_ROUND_KEYS_COUNT; i++) {
+ grasshopper_zero128(&c->decrypt_round_keys.k[i]);
}
+ grasshopper_zero128(&c->buffer);
+}
- 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);
+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;
- if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
- EVP_CIPHER_CTX_set_app_data(ctx,
- EVP_CIPHER_CTX_get_cipher_data(ctx));
- }
+ grasshopper_zero128(&ctx->buffer1);
+}
- if (key != NULL) {
- gost_grasshopper_cipher_key(c, key);
- }
+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;
- if (iv != NULL) {
- 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));
+ grasshopper_zero128(&ctx->partial_buffer);
+}
- grasshopper_zero128(&c->buffer);
+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);
- return 1;
+ if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
+ EVP_CIPHER_CTX_set_app_data(ctx,
+ 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);
+ if (key != NULL) {
+ gost_grasshopper_cipher_key(c, key);
}
- 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);
+ if (iv != NULL) {
+ memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
+ EVP_CIPHER_CTX_iv_length(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);
+ memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
+ EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
- c->c.type = GRASSHOPPER_CIPHER_OFB;
+ grasshopper_zero128(&c->buffer);
- grasshopper_zero128(&c->buffer1);
+ return 1;
+}
- return gost_grasshopper_cipher_init(ctx, key, iv, 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_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_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_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_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_CTR;
- EVP_CIPHER_CTX_set_num(ctx, 0);
+ c->c.type = GRASSHOPPER_CIPHER_OFB;
- grasshopper_zero128(&c->partial_buffer);
+ grasshopper_zero128(&c->buffer1);
- return gost_grasshopper_cipher_init(ctx, key, iv, enc);
- }
+ 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;
+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);
+}
- 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_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];
+ c->c.type = GRASSHOPPER_CIPHER_CTR;
+ EVP_CIPHER_CTX_set_num(ctx, 0);
- return params->do_cipher(ctx, out, in, inl);
- }
+ grasshopper_zero128(&c->partial_buffer);
- 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;
- 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) {
- if (encrypting) {
- 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,
- &c->buffer);
- }
- }
+ return gost_grasshopper_cipher_init(ctx, key, iv, enc);
+}
- return 1;
- }
+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);
+}
- 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;
-
- 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;
- if (encrypting) {
- grasshopper_append128(currentBlock, currentInputBlock);
- 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_append128(currentOutputBlock, currentBlock);
- grasshopper_copy128(currentBlock, currentInputBlock);
- }
- }
+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 1;
- }
+ return params->do_cipher(ctx, out, in, inl);
+}
- 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);
+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;
+ 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) {
+ if (encrypting) {
+ 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,
+ &c->buffer);
+ }
}
-/* increment counter (128-bit int) by 1 */
- static void ctr128_inc(unsigned char *counter) {
- inc_counter(counter, 16);
- }
+ return 1;
+}
- 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;
-
- // 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);
- ctr128_inc(iv_buffer->b);
- current_in += GRASSHOPPER_BLOCK_SIZE;
- current_out += GRASSHOPPER_BLOCK_SIZE;
+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;
+
+ 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;
+ if (encrypting) {
+ grasshopper_append128(currentBlock, currentInputBlock);
+ 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_append128(currentOutputBlock, currentBlock);
+ grasshopper_copy128(currentBlock, currentInputBlock);
}
+ }
- // 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;
+}
- return 1;
- }
+void inc_counter(unsigned char *counter, size_t counter_bytes) {
+ unsigned char c;
+ unsigned int n = counter_bytes;
-#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))
+ do {
+ --n;
+ c = counter[n];
+ ++c;
+ counter[n] = c;
+ if (c)
return;
- acpkm_next(&ctx->c);
- *num &= GRASSHOPPER_BLOCK_MASK;
- }
+ } while (n);
+}
-/* 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;
- size_t i;
-
- // 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);
- ctr128_inc(iv);
- in += GRASSHOPPER_BLOCK_SIZE;
- out += GRASSHOPPER_BLOCK_SIZE;
- num += GRASSHOPPER_BLOCK_SIZE;
- }
+/* increment counter (128-bit int) by 1 */
+static void ctr128_inc(unsigned char *counter) {
+ inc_counter(counter, 16);
+}
- // 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;
+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;
+
+ // 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);
+ 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, num);
-
- return 1;
+ EVP_CIPHER_CTX_set_num(ctx, i);
+ ctr128_inc(iv_buffer->b);
}
+ return 1;
+}
+
+#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;
+ size_t i;
+
+ // 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);
+ 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;
+}
+
/*
* 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);
- 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;
- 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);
- return 1;
- }
- }
+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);
+ grasshopper_encrypt_block(&ctx->c.encrypt_round_keys, &ctx->buffer1,
+ buf, &ctx->c.buffer);
+ memcpy(iv, buf, 16);
+}
- for (; i + 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);
-
- /*
- * xor next block of input text with it and output it
- */
- /*
- * output this block
- */
- for (j = 0; j < GRASSHOPPER_BLOCK_SIZE; j++) {
- out_ptr[j] = buf[j] ^ in_ptr[j];
- }
+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;
+ j++, i++, in_ptr++, out_ptr++) {
+ *out_ptr = buf[j] ^ (*in_ptr);
}
-
- /* Process rest of buffer */
- if (i < inl) {
- 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);
- } else {
+ if (j == GRASSHOPPER_BLOCK_SIZE) {
EVP_CIPHER_CTX_set_num(ctx, 0);
+ } else {
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
+ return 1;
}
-
- return 1;
}
- 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;
- size_t j = 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++) {
- if (!encrypting) {
- buf[j + GRASSHOPPER_BLOCK_SIZE] = *in_ptr;
- }
- *out_ptr = buf[j] ^ (*in_ptr);
- if (encrypting) {
- buf[j + GRASSHOPPER_BLOCK_SIZE] = *out_ptr;
- }
- }
- if (j == 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;
- }
+ for (; i + 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);
+
+ /*
+ * xor next block of input text with it and output it
+ */
+ /*
+ * output this block
+ */
+ for (j = 0; j < GRASSHOPPER_BLOCK_SIZE; j++) {
+ out_ptr[j] = buf[j] ^ in_ptr[j];
}
+ }
- for (; i + 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);
- /*
- * xor next block of input text with it and output it
- */
- /*
- * output this block
- */
- if (!encrypting) {
- memcpy(iv, in_ptr, GRASSHOPPER_BLOCK_SIZE);
- }
- for (j = 0; j < GRASSHOPPER_BLOCK_SIZE; j++) {
- out_ptr[j] = buf[j] ^ in_ptr[j];
- }
- /* Encrypt */
- /* Next iv is next block of cipher text */
- if (encrypting) {
- memcpy(iv, out_ptr, GRASSHOPPER_BLOCK_SIZE);
- }
+ /* Process rest of buffer */
+ if (i < inl) {
+ 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);
+ } else {
+ EVP_CIPHER_CTX_set_num(ctx, 0);
+ }
- /* Process rest of buffer */
- if (i < inl) {
- grasshopper_encrypt_block(&c->encrypt_round_keys,
- (grasshopper_w128_t *) iv,
- (grasshopper_w128_t *) buf, &c->buffer);
+ return 1;
+}
+
+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;
+ size_t j = 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++) {
if (!encrypting) {
- memcpy(buf + GRASSHOPPER_BLOCK_SIZE, in_ptr, inl - i);
+ buf[j + GRASSHOPPER_BLOCK_SIZE] = *in_ptr;
}
- for (j = 0; i < inl; j++, i++) {
- out_ptr[j] = buf[j] ^ in_ptr[j];
- }
- EVP_CIPHER_CTX_set_num(ctx, (int)j);
+ *out_ptr = buf[j] ^ (*in_ptr);
if (encrypting) {
- memcpy(buf + GRASSHOPPER_BLOCK_SIZE, out_ptr, j);
+ buf[j + GRASSHOPPER_BLOCK_SIZE] = *out_ptr;
}
- } else {
+ }
+ if (j == 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;
}
+ }
- return 1;
+ for (; i + 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);
+ /*
+ * xor next block of input text with it and output it
+ */
+ /*
+ * output this block
+ */
+ if (!encrypting) {
+ memcpy(iv, in_ptr, GRASSHOPPER_BLOCK_SIZE);
+ }
+ for (j = 0; j < GRASSHOPPER_BLOCK_SIZE; j++) {
+ out_ptr[j] = buf[j] ^ in_ptr[j];
+ }
+ /* Encrypt */
+ /* Next iv is next block of cipher text */
+ if (encrypting) {
+ memcpy(iv, out_ptr, GRASSHOPPER_BLOCK_SIZE);
+ }
}
- 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);
+ /* Process rest of buffer */
+ if (i < inl) {
+ 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);
+ if (encrypting) {
+ memcpy(buf + GRASSHOPPER_BLOCK_SIZE, out_ptr, j);
+ }
+ } else {
+ EVP_CIPHER_CTX_set_num(ctx, 0);
+ }
- if (!c)
- return 1;
+ return 1;
+}
- 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);
- gost_grasshopper_cipher_destroy(c);
- if (params->destroy_cipher != NULL) {
- params->destroy_cipher(c);
- }
+ if (!c)
+ return 1;
- EVP_CIPHER_CTX_set_app_data(ctx, NULL);
+ struct GRASSHOPPER_CIPHER_PARAMS *params = &gost_cipher_params[c->type];
- return 1;
+ gost_grasshopper_cipher_destroy(c);
+ if (params->destroy_cipher != NULL) {
+ params->destroy_cipher(c);
}
- 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;
+ EVP_CIPHER_CTX_set_app_data(ctx, NULL);
- os = ASN1_OCTET_STRING_new();
+ return 1;
+}
- 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);
+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;
- ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
- return 1;
+ os = ASN1_OCTET_STRING_new();
+
+ 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);
- GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX
- *ctx,
- ASN1_TYPE
- *params) {
- int ret = -1;
+ ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os);
+ return 1;
+}
- if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
- return ret;
- }
+GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX
+ *ctx,
+ ASN1_TYPE
+ *params) {
+ int ret = -1;
- return 1;
+ if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
+ return ret;
}
- 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);
- 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))
- return -1;
- c->section_size = arg;
- break;
+ return 1;
+}
+
+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);
+ return -1;
}
- default:
- GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
- GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
- return -1;
+ break;
}
- 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;
+ }
+ default:
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
+ GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
+ return -1;
}
+ 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 */ );
- }
+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) {
+ 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 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];
+ cipher = &gost_grasshopper_ciphers[num];
- if (*cipher == NULL) {
- 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;
-
- *cipher = cipher_gost_grasshopper_create(nid, block_size);
- if (*cipher == NULL) {
- return NULL;
- }
+ if (*cipher == NULL) {
+ params = &gost_cipher_params[num];
- 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;
- }
+ 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;
+
+ *cipher = cipher_gost_grasshopper_create(nid, block_size);
+ if (*cipher == NULL) {
+ return NULL;
}
- return *cipher;
+ 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;
+ }
}
- const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ecb() {
- return cipher_gost_grasshopper(EVP_CIPH_ECB_MODE,
- GRASSHOPPER_CIPHER_ECB);
- }
+ return *cipher;
+}
- 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_ecb() {
+ return cipher_gost_grasshopper(EVP_CIPH_ECB_MODE,
+ GRASSHOPPER_CIPHER_ECB);
+}
- 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_cbc() {
+ return cipher_gost_grasshopper(EVP_CIPH_CBC_MODE,
+ GRASSHOPPER_CIPHER_CBC);
+}
- 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_ofb() {
+ return cipher_gost_grasshopper(EVP_CIPH_OFB_MODE,
+ GRASSHOPPER_CIPHER_OFB);
+}
- 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_cfb() {
+ return cipher_gost_grasshopper(EVP_CIPH_CFB_MODE,
+ GRASSHOPPER_CIPHER_CFB);
+}
- 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_ctr() {
+ return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE,
+ GRASSHOPPER_CIPHER_CTR);
+}
- 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;
- }
+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;
+}
#if defined(__cplusplus)
}
projects / openssl-gost / engine.git / commitdiff