X-Git-Url: http://www.wagner.pp.ru/gitweb/?a=blobdiff_plain;f=gost_grasshopper_cipher.c;h=d641bcb114ee2a60ac44bc3a1eb0ea39f7f291aa;hb=b0129fa19b2d53c99f9c958ea7fdd2c77e14c1a4;hp=a482a39cf0728ea2bf75746109cfe8aa85708293;hpb=77b9f487ae6a97e2c71d82d2658f96adf643390d;p=openssl-gost%2Fengine.git diff --git a/gost_grasshopper_cipher.c b/gost_grasshopper_cipher.c index a482a39..d641bcb 100644 --- a/gost_grasshopper_cipher.c +++ b/gost_grasshopper_cipher.c @@ -20,751 +20,849 @@ extern "C" { #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] = { + 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] = { + }; + + 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 - }, + 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 - }, + 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 - }, + 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 - }, + 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 - }, + 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 - }, -}; + 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_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_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_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_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; - - 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; - grasshopper_zero128(&ctx->partial_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; -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)); + 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)); + grasshopper_zero128(&ctx->partial_buffer); } - memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), - EVP_CIPHER_CTX_original_iv(ctx), - EVP_CIPHER_CTX_iv_length(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); - grasshopper_zero128(&c->buffer); + if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) { + EVP_CIPHER_CTX_set_app_data(ctx, + EVP_CIPHER_CTX_get_cipher_data(ctx)); + } - return 1; -} + if (key != NULL) { + gost_grasshopper_cipher_key(c, key); + } -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 (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_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); -} + memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), + EVP_CIPHER_CTX_original_iv(ctx), 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); + grasshopper_zero128(&c->buffer); - c->c.type = GRASSHOPPER_CIPHER_OFB; + return 1; + } - grasshopper_zero128(&c->buffer1); + 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); + } - 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_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_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_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_OFB; - c->c.type = GRASSHOPPER_CIPHER_CTR; - EVP_CIPHER_CTX_set_num(ctx, 0); + grasshopper_zero128(&c->buffer1); - grasshopper_zero128(&c->partial_buffer); + 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_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_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); + 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); - /* 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; + c->c.type = GRASSHOPPER_CIPHER_CTR; + EVP_CIPHER_CTX_set_num(ctx, 0); - return gost_grasshopper_cipher_init(ctx, key, iv, enc); -} + grasshopper_zero128(&c->partial_buffer); -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 gost_grasshopper_cipher_init(ctx, key, iv, enc); + } - return params->do_cipher(ctx, out, in, inl); -} + 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; -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_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]; -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); + return params->do_cipher(ctx, out, in, inl); + } + + 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 1; } - return 1; -} + 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); + } + } -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); -} + 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); -} + 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; - - // 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]; + 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; } - EVP_CIPHER_CTX_set_num(ctx, i); - ctr128_inc(iv_buffer->b); - } - return 1; -} + // 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; + } #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; -} + 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; -} + 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); -} + 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; + 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; + } } - } - 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 + */ + /* 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]; + } } - } - /* 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]; + /* 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); } - EVP_CIPHER_CTX_set_num(ctx, (int) j); - } else { - EVP_CIPHER_CTX_set_num(ctx, 0); + + 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; + } + } -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++) { + 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) { - buf[j + GRASSHOPPER_BLOCK_SIZE] = *in_ptr; + memcpy(iv, in_ptr, GRASSHOPPER_BLOCK_SIZE); } - *out_ptr = buf[j] ^ (*in_ptr); + 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) { - buf[j + GRASSHOPPER_BLOCK_SIZE] = *out_ptr; + memcpy(iv, out_ptr, GRASSHOPPER_BLOCK_SIZE); } } - if (j == GRASSHOPPER_BLOCK_SIZE) { - memcpy(iv, buf + GRASSHOPPER_BLOCK_SIZE, GRASSHOPPER_BLOCK_SIZE); - 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); + 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, (int) j); - return 1; + EVP_CIPHER_CTX_set_num(ctx, 0); } - } - 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); - } + return 1; } - /* 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); - } + 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); - return 1; -} + if (!c) + return 1; -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]; - if (!c) - return 1; + gost_grasshopper_cipher_destroy(c); + if (params->destroy_cipher != NULL) { + params->destroy_cipher(c); + } - struct GRASSHOPPER_CIPHER_PARAMS* params = &gost_cipher_params[c->type]; + EVP_CIPHER_CTX_set_app_data(ctx, NULL); - gost_grasshopper_cipher_destroy(c); - if (params->destroy_cipher != NULL) { - params->destroy_cipher(c); + return 1; } - EVP_CIPHER_CTX_set_app_data(ctx, NULL); - - return 1; -} - -int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) { - int len = 0; - unsigned char* buf = NULL; - ASN1_OCTET_STRING* os = NULL; + 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; - os = ASN1_OCTET_STRING_new(); + os = ASN1_OCTET_STRING_new(); - if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) { + 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); - GOSTerr(GOST_F_GOST_GRASSHOPPER_SET_ASN1_PARAMETERS, ERR_R_MALLOC_FAILURE); - return 0; + + ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os); + return 1; } - OPENSSL_free(buf); - ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os); - return 1; -} + GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX + *ctx, + ASN1_TYPE + *params) { + int ret = -1; -GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) { - int ret = -1; + if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) { + return ret; + } - if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) { - return ret; + return 1; } - 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; + 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; } - 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; - } default: - GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND); + GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, + GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND); return -1; + } + 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 */); -} - -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; + 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 */ ); + } - cipher = &gost_grasshopper_ciphers[num]; + const int cipher_gost_grasshopper_setup(EVP_CIPHER *cipher, uint8_t mode, + int iv_size, bool padding) { + return EVP_CIPHER_meth_set_iv_length(cipher, iv_size) + && EVP_CIPHER_meth_set_flags(cipher, + (unsigned long)(mode | + ((!padding) ? + EVP_CIPH_NO_PADDING : + 0) | ((iv_size > + 0) ? + EVP_CIPH_CUSTOM_IV + : 0) | + EVP_CIPH_RAND_KEY | + EVP_CIPH_ALWAYS_CALL_INIT) + ) + && EVP_CIPHER_meth_set_cleanup(cipher, + gost_grasshopper_cipher_cleanup) + && EVP_CIPHER_meth_set_set_asn1_params(cipher, + gost_grasshopper_set_asn1_parameters) + && EVP_CIPHER_meth_set_get_asn1_params(cipher, + gost_grasshopper_get_asn1_parameters) + && EVP_CIPHER_meth_set_ctrl(cipher, gost_grasshopper_cipher_ctl) + && EVP_CIPHER_meth_set_do_cipher(cipher, + gost_grasshopper_cipher_do); + } - if (*cipher == NULL) { - params = &gost_cipher_params[num]; + const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper(uint8_t mode, + uint8_t num) { + EVP_CIPHER **cipher; + struct GRASSHOPPER_CIPHER_PARAMS *params; - 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 = &gost_grasshopper_ciphers[num]; - *cipher = cipher_gost_grasshopper_create(nid, block_size); if (*cipher == NULL) { - return 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_gost_grasshopper_setup(*cipher, mode, iv_size, padding) || - !EVP_CIPHER_meth_set_init(*cipher, init_cipher) || - !EVP_CIPHER_meth_set_impl_ctx_size(*cipher, ctx_size)) { - EVP_CIPHER_meth_free(*cipher); - *cipher = NULL; + if (!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; + } } - } - return *cipher; -} + return *cipher; + } -const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_ecb() { - return cipher_gost_grasshopper(EVP_CIPH_ECB_MODE, GRASSHOPPER_CIPHER_ECB); -} + const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ecb() { + return cipher_gost_grasshopper(EVP_CIPH_ECB_MODE, + GRASSHOPPER_CIPHER_ECB); + } -const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_cbc() { - return cipher_gost_grasshopper(EVP_CIPH_CBC_MODE, GRASSHOPPER_CIPHER_CBC); -} + const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_cbc() { + return cipher_gost_grasshopper(EVP_CIPH_CBC_MODE, + GRASSHOPPER_CIPHER_CBC); + } -const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_ofb() { - return cipher_gost_grasshopper(EVP_CIPH_OFB_MODE, GRASSHOPPER_CIPHER_OFB); -} + const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ofb() { + return cipher_gost_grasshopper(EVP_CIPH_OFB_MODE, + GRASSHOPPER_CIPHER_OFB); + } -const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_cfb() { - return cipher_gost_grasshopper(EVP_CIPH_CFB_MODE, GRASSHOPPER_CIPHER_CFB); -} + const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_cfb() { + return cipher_gost_grasshopper(EVP_CIPH_CFB_MODE, + GRASSHOPPER_CIPHER_CFB); + } -const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_ctr() { - return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, GRASSHOPPER_CIPHER_CTR); -} + const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctr() { + return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, + GRASSHOPPER_CIPHER_CTR); + } -const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_ctracpkm() { - return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, GRASSHOPPER_CIPHER_CTRACPKM); -} + const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctracpkm() { + return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, + GRASSHOPPER_CIPHER_CTRACPKM); + } -void cipher_gost_grasshopper_destroy(void) -{ - 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; -} + 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) }