X-Git-Url: http://wagner.pp.ru/gitweb/?a=blobdiff_plain;f=gost_grasshopper_cipher.c;h=38dd98776d06a3e6a7b7b99b854e4e746a19cd65;hb=4952acb810d5bca35ff514099a5c43bc13a06405;hp=a045a92d754eb780692150649aed8beea50bacdc;hpb=ff6364a8907b15684e685e8d7984088cfb4c74b4;p=openssl-gost%2Fengine.git diff --git a/gost_grasshopper_cipher.c b/gost_grasshopper_cipher.c index a045a92..38dd987 100644 --- a/gost_grasshopper_cipher.c +++ b/gost_grasshopper_cipher.c @@ -1,16 +1,14 @@ /* * Maxim Tishkov 2016 + * Copyright (c) 2020 Vitaly Chikunov * This file is distributed under the same license as OpenSSL */ -#if defined(__cplusplus) -extern "C" { -#endif - #include "gost_grasshopper_cipher.h" #include "gost_grasshopper_defines.h" #include "gost_grasshopper_math.h" #include "gost_grasshopper_core.h" +#include "gost_gost2015.h" #include #include @@ -27,98 +25,103 @@ enum GRASSHOPPER_CIPHER_TYPE { GRASSHOPPER_CIPHER_CFB, GRASSHOPPER_CIPHER_CTR, GRASSHOPPER_CIPHER_CTRACPKM, + GRASSHOPPER_CIPHER_CTRACPKMOMAC, }; -static EVP_CIPHER *gost_grasshopper_ciphers[6] = { - [GRASSHOPPER_CIPHER_ECB] = NULL, - [GRASSHOPPER_CIPHER_CBC] = NULL, - [GRASSHOPPER_CIPHER_OFB] = NULL, - [GRASSHOPPER_CIPHER_CFB] = NULL, - [GRASSHOPPER_CIPHER_CTR] = NULL, - [GRASSHOPPER_CIPHER_CTRACPKM] = NULL, +static GOST_cipher grasshopper_template_cipher = { + .block_size = GRASSHOPPER_BLOCK_SIZE, + .key_len = GRASSHOPPER_KEY_SIZE, + .flags = EVP_CIPH_RAND_KEY | + EVP_CIPH_ALWAYS_CALL_INIT, + .cleanup = gost_grasshopper_cipher_cleanup, + .ctx_size = sizeof(gost_grasshopper_cipher_ctx), + .set_asn1_parameters = gost_grasshopper_set_asn1_parameters, + .get_asn1_parameters = gost_grasshopper_get_asn1_parameters, + .ctrl = gost_grasshopper_cipher_ctl, }; -static GRASSHOPPER_INLINE void - gost_grasshopper_cipher_destroy_ofb(gost_grasshopper_cipher_ctx * c); -static GRASSHOPPER_INLINE void - gost_grasshopper_cipher_destroy_ctr(gost_grasshopper_cipher_ctx * c); - -struct GRASSHOPPER_CIPHER_PARAMS { - int nid; - grasshopper_init_cipher_func init_cipher; - grasshopper_do_cipher_func do_cipher; - grasshopper_destroy_cipher_func destroy_cipher; - int block_size; - int ctx_size; - int iv_size; - bool padding; +GOST_cipher grasshopper_ecb_cipher = { + .nid = NID_grasshopper_ecb, + .template = &grasshopper_template_cipher, + .flags = EVP_CIPH_ECB_MODE, + .init = gost_grasshopper_cipher_init_ecb, + .do_cipher = gost_grasshopper_cipher_do_ecb, }; -static struct GRASSHOPPER_CIPHER_PARAMS gost_cipher_params[6] = { - [GRASSHOPPER_CIPHER_ECB] = { - NID_grasshopper_ecb, - gost_grasshopper_cipher_init_ecb, - gost_grasshopper_cipher_do_ecb, - NULL, - 16, - sizeof(gost_grasshopper_cipher_ctx), - 0, - true} - , - [GRASSHOPPER_CIPHER_CBC] = { - NID_grasshopper_cbc, - gost_grasshopper_cipher_init_cbc, - gost_grasshopper_cipher_do_cbc, - NULL, - 16, - sizeof(gost_grasshopper_cipher_ctx), - 16, - true} - , - [GRASSHOPPER_CIPHER_OFB] = { - NID_grasshopper_ofb, - gost_grasshopper_cipher_init_ofb, - gost_grasshopper_cipher_do_ofb, - gost_grasshopper_cipher_destroy_ofb, - 1, - sizeof(gost_grasshopper_cipher_ctx_ofb), - 16, - false} - , - [GRASSHOPPER_CIPHER_CFB] = { - NID_grasshopper_cfb, - gost_grasshopper_cipher_init_cfb, - gost_grasshopper_cipher_do_cfb, - NULL, - 1, - sizeof(gost_grasshopper_cipher_ctx), - 16, - false} - , - [GRASSHOPPER_CIPHER_CTR] = { - NID_grasshopper_ctr, - gost_grasshopper_cipher_init_ctr, - gost_grasshopper_cipher_do_ctr, - gost_grasshopper_cipher_destroy_ctr, - 1, - sizeof(gost_grasshopper_cipher_ctx_ctr), - /* IV size is set to match full block, to make it responsibility of - * user to assign correct values (IV || 0), and to make naive context - * copy possible (for software such as openssh) */ - 16, - false} - , - [GRASSHOPPER_CIPHER_CTRACPKM] = { - NID_id_tc26_cipher_gostr3412_2015_kuznyechik_ctracpkm, - gost_grasshopper_cipher_init_ctracpkm, - gost_grasshopper_cipher_do_ctracpkm, - gost_grasshopper_cipher_destroy_ctr, - 1, - sizeof - (gost_grasshopper_cipher_ctx_ctr), - 16, - false} - , +GOST_cipher grasshopper_cbc_cipher = { + .nid = NID_grasshopper_cbc, + .template = &grasshopper_template_cipher, + .iv_len = 16, + .flags = EVP_CIPH_CBC_MODE | + EVP_CIPH_CUSTOM_IV, + .init = gost_grasshopper_cipher_init_cbc, + .do_cipher = gost_grasshopper_cipher_do_cbc, +}; + +GOST_cipher grasshopper_ofb_cipher = { + .nid = NID_grasshopper_ofb, + .template = &grasshopper_template_cipher, + .block_size = 1, + .iv_len = 16, + .flags = EVP_CIPH_OFB_MODE | + EVP_CIPH_NO_PADDING | + EVP_CIPH_CUSTOM_IV, + .init = gost_grasshopper_cipher_init_ofb, + .do_cipher = gost_grasshopper_cipher_do_ofb, +}; + +GOST_cipher grasshopper_cfb_cipher = { + .nid = NID_grasshopper_cfb, + .template = &grasshopper_template_cipher, + .block_size = 1, + .iv_len = 16, + .flags = EVP_CIPH_CFB_MODE | + EVP_CIPH_NO_PADDING | + EVP_CIPH_CUSTOM_IV, + .init = gost_grasshopper_cipher_init_cfb, + .do_cipher = gost_grasshopper_cipher_do_cfb, +}; + +GOST_cipher grasshopper_ctr_cipher = { + .nid = NID_grasshopper_ctr, + .template = &grasshopper_template_cipher, + .block_size = 1, + .iv_len = 8, + .flags = EVP_CIPH_CTR_MODE | + EVP_CIPH_NO_PADDING | + EVP_CIPH_CUSTOM_IV, + .init = gost_grasshopper_cipher_init_ctr, + .do_cipher = gost_grasshopper_cipher_do_ctr, + .ctx_size = sizeof(gost_grasshopper_cipher_ctx_ctr), +}; + +GOST_cipher grasshopper_ctr_acpkm_cipher = { + .nid = NID_kuznyechik_ctr_acpkm, + .template = &grasshopper_template_cipher, + .block_size = 1, + .iv_len = 8, + .flags = EVP_CIPH_CTR_MODE | + EVP_CIPH_NO_PADDING | + EVP_CIPH_CUSTOM_IV, + .init = gost_grasshopper_cipher_init_ctracpkm, + .do_cipher = gost_grasshopper_cipher_do_ctracpkm, + .ctx_size = sizeof(gost_grasshopper_cipher_ctx_ctr), +}; + +GOST_cipher grasshopper_ctr_acpkm_omac_cipher = { + .nid = NID_kuznyechik_ctr_acpkm_omac, + .template = &grasshopper_template_cipher, + .block_size = 1, + .iv_len = 8, + .flags = EVP_CIPH_CTR_MODE | + EVP_CIPH_NO_PADDING | + EVP_CIPH_CUSTOM_IV | + EVP_CIPH_FLAG_CUSTOM_CIPHER | + EVP_CIPH_FLAG_CIPHER_WITH_MAC | + EVP_CIPH_CUSTOM_COPY, + .init = gost_grasshopper_cipher_init_ctracpkm_omac, + .do_cipher = gost_grasshopper_cipher_do_ctracpkm_omac, + .ctx_size = sizeof(gost_grasshopper_cipher_ctx_ctr), }; /* first 256 bit of D from draft-irtf-cfrg-re-keying-12 */ @@ -129,14 +132,14 @@ static const unsigned char ACPKM_D_2018[] = { 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 256 bit */ }; -static void acpkm_next(gost_grasshopper_cipher_ctx * c) { +static void acpkm_next(gost_grasshopper_cipher_ctx * c) +{ unsigned char newkey[GRASSHOPPER_KEY_SIZE]; const int J = GRASSHOPPER_KEY_SIZE / GRASSHOPPER_BLOCK_SIZE; int n; for (n = 0; n < J; n++) { - const unsigned char *D_n = - &ACPKM_D_2018[n * GRASSHOPPER_BLOCK_SIZE]; + const unsigned char *D_n = &ACPKM_D_2018[n * GRASSHOPPER_BLOCK_SIZE]; grasshopper_encrypt_block(&c->encrypt_round_keys, (grasshopper_w128_t *) D_n, @@ -148,24 +151,38 @@ static void acpkm_next(gost_grasshopper_cipher_ctx * c) { } /* Set 256 bit key into context */ -GRASSHOPPER_INLINE void - gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx * c, - const uint8_t *k) { +static GRASSHOPPER_INLINE void +gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx * c, const uint8_t *k) +{ int i; for (i = 0; i < 2; i++) { grasshopper_copy128(&c->key.k.k[i], (const grasshopper_w128_t *)(k + i * 16)); } + grasshopper_set_encrypt_key(&c->encrypt_round_keys, &c->key); grasshopper_set_decrypt_key(&c->decrypt_round_keys, &c->key); } +/* Set master 256-bit key to be used in TLSTREE calculation into context */ +static GRASSHOPPER_INLINE void +gost_grasshopper_master_key(gost_grasshopper_cipher_ctx * c, const uint8_t *k) +{ + int i; + for (i = 0; i < 2; i++) { + grasshopper_copy128(&c->master_key.k.k[i], + (const grasshopper_w128_t *)(k + i * 16)); + } +} + /* Cleans up key from context */ -GRASSHOPPER_INLINE void - gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx * c) { +static GRASSHOPPER_INLINE void +gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx * c) +{ int i; for (i = 0; i < 2; i++) { grasshopper_zero128(&c->key.k.k[i]); + grasshopper_zero128(&c->master_key.k.k[i]); } for (i = 0; i < GRASSHOPPER_ROUND_KEYS_COUNT; i++) { grasshopper_zero128(&c->encrypt_round_keys.k[i]); @@ -177,33 +194,35 @@ GRASSHOPPER_INLINE void } static GRASSHOPPER_INLINE void - gost_grasshopper_cipher_destroy_ofb(gost_grasshopper_cipher_ctx * c) { - gost_grasshopper_cipher_ctx_ofb *ctx = - (gost_grasshopper_cipher_ctx_ofb *) c; - - grasshopper_zero128(&ctx->buffer1); -} - -static GRASSHOPPER_INLINE void - gost_grasshopper_cipher_destroy_ctr(gost_grasshopper_cipher_ctx * c) { +gost_grasshopper_cipher_destroy_ctr(gost_grasshopper_cipher_ctx * c) +{ gost_grasshopper_cipher_ctx_ctr *ctx = (gost_grasshopper_cipher_ctx_ctr *) c; + if (ctx->omac_ctx) + EVP_MD_CTX_free(ctx->omac_ctx); + grasshopper_zero128(&ctx->partial_buffer); } -int gost_grasshopper_cipher_init(EVP_CIPHER_CTX *ctx, +static int gost_grasshopper_cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, - const unsigned char *iv, int enc) { + const unsigned char *iv, int enc) +{ gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx); if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) { - EVP_CIPHER_CTX_set_app_data(ctx, - EVP_CIPHER_CTX_get_cipher_data(ctx)); + EVP_CIPHER_CTX_set_app_data(ctx, EVP_CIPHER_CTX_get_cipher_data(ctx)); + if (enc && c->type == GRASSHOPPER_CIPHER_CTRACPKM) { + gost_grasshopper_cipher_ctx_ctr *ctr = EVP_CIPHER_CTX_get_cipher_data(ctx); + if (init_zero_kdf_seed(ctr->kdf_seed) == 0) + return -1; + } } if (key != NULL) { gost_grasshopper_cipher_key(c, key); + gost_grasshopper_master_key(c, key); } if (iv != NULL) { @@ -219,58 +238,52 @@ int gost_grasshopper_cipher_init(EVP_CIPHER_CTX *ctx, return 1; } -GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX *ctx, - const unsigned char - *key, - const unsigned char - *iv, int enc) { +static GRASSHOPPER_INLINE int +gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX *ctx, const unsigned char + *key, const unsigned char + *iv, int enc) +{ gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx); c->type = GRASSHOPPER_CIPHER_ECB; return gost_grasshopper_cipher_init(ctx, key, iv, enc); } -GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cbc(EVP_CIPHER_CTX *ctx, - const unsigned char - *key, - const unsigned char - *iv, int enc) { +static GRASSHOPPER_INLINE int +gost_grasshopper_cipher_init_cbc(EVP_CIPHER_CTX *ctx, const unsigned char + *key, const unsigned char + *iv, int enc) +{ gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx); c->type = GRASSHOPPER_CIPHER_CBC; return gost_grasshopper_cipher_init(ctx, key, iv, enc); } -GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX *ctx, - const unsigned char - *key, - const unsigned char - *iv, int enc) { - gost_grasshopper_cipher_ctx_ofb *c = - EVP_CIPHER_CTX_get_cipher_data(ctx); - - c->c.type = GRASSHOPPER_CIPHER_OFB; - - grasshopper_zero128(&c->buffer1); - +static GRASSHOPPER_INLINE +int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX *ctx, const unsigned char + *key, const unsigned char + *iv, int enc) +{ + gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx); + c->type = GRASSHOPPER_CIPHER_OFB; return gost_grasshopper_cipher_init(ctx, key, iv, enc); } -GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX *ctx, - const unsigned char - *key, - const unsigned char - *iv, int enc) { +static GRASSHOPPER_INLINE int +gost_grasshopper_cipher_init_cfb(EVP_CIPHER_CTX *ctx, const unsigned char + *key, const unsigned char + *iv, int enc) +{ gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx); c->type = GRASSHOPPER_CIPHER_CFB; return gost_grasshopper_cipher_init(ctx, key, iv, enc); } -GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX *ctx, - const unsigned char - *key, - const unsigned char - *iv, int enc) { - gost_grasshopper_cipher_ctx_ctr *c = - EVP_CIPHER_CTX_get_cipher_data(ctx); +static GRASSHOPPER_INLINE int +gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX *ctx, const unsigned char + *key, const unsigned char + *iv, int enc) +{ + gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx); c->c.type = GRASSHOPPER_CIPHER_CTR; EVP_CIPHER_CTX_set_num(ctx, 0); @@ -280,15 +293,13 @@ GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctr(EVP_CIPHER_CTX *ctx, return gost_grasshopper_cipher_init(ctx, key, iv, enc); } -GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctracpkm(EVP_CIPHER_CTX - *ctx, - const unsigned - char *key, - const unsigned - char *iv, - int enc) { - gost_grasshopper_cipher_ctx_ctr *c = - EVP_CIPHER_CTX_get_cipher_data(ctx); +static GRASSHOPPER_INLINE int +gost_grasshopper_cipher_init_ctracpkm(EVP_CIPHER_CTX + *ctx, const unsigned + char *key, const unsigned + char *iv, int enc) +{ + gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx); /* NB: setting type makes EVP do_cipher callback useless */ c->c.type = GRASSHOPPER_CIPHER_CTRACPKM; @@ -298,19 +309,44 @@ GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ctracpkm(EVP_CIPHER_CTX return gost_grasshopper_cipher_init(ctx, key, iv, enc); } -GRASSHOPPER_INLINE int gost_grasshopper_cipher_do(EVP_CIPHER_CTX *ctx, - unsigned char *out, - const unsigned char *in, - size_t inl) { - gost_grasshopper_cipher_ctx *c = - (gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx); - struct GRASSHOPPER_CIPHER_PARAMS *params = &gost_cipher_params[c->type]; +static GRASSHOPPER_INLINE int +gost_grasshopper_cipher_init_ctracpkm_omac(EVP_CIPHER_CTX + *ctx, const unsigned + char *key, const unsigned + char *iv, int enc) +{ + gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx); + + /* NB: setting type makes EVP do_cipher callback useless */ + c->c.type = GRASSHOPPER_CIPHER_CTRACPKMOMAC; + EVP_CIPHER_CTX_set_num(ctx, 0); + c->section_size = 4096; + + if (key) { + unsigned char cipher_key[32]; + c->omac_ctx = EVP_MD_CTX_new(); + + if (c->omac_ctx == NULL) { + GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_INIT_CTRACPKM_OMAC, ERR_R_MALLOC_FAILURE); + return 0; + } + + if (gost2015_acpkm_omac_init(NID_kuznyechik_mac, enc, key, + c->omac_ctx, cipher_key, c->kdf_seed) != 1) { + EVP_MD_CTX_free(c->omac_ctx); + c->omac_ctx = NULL; + return 0; + } + + return gost_grasshopper_cipher_init(ctx, cipher_key, iv, enc); + } - return params->do_cipher(ctx, out, in, inl); + return gost_grasshopper_cipher_init(ctx, key, iv, enc); } -int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, size_t inl) { +static int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) +{ gost_grasshopper_cipher_ctx *c = (gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx); bool encrypting = (bool) EVP_CIPHER_CTX_encrypting(ctx); @@ -338,16 +374,15 @@ int gost_grasshopper_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out, return 1; } -int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, size_t inl) { +static int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) +{ gost_grasshopper_cipher_ctx *c = (gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx); unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx); bool encrypting = (bool) EVP_CIPHER_CTX_encrypting(ctx); const unsigned char *current_in = in; unsigned char *current_out = out; - grasshopper_w128_t *currentInputBlock; - grasshopper_w128_t *currentOutputBlock; size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE; size_t i; grasshopper_w128_t *currentBlock; @@ -357,8 +392,8 @@ int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out, for (i = 0; i < blocks; i++, current_in += GRASSHOPPER_BLOCK_SIZE, current_out += GRASSHOPPER_BLOCK_SIZE) { - currentInputBlock = (grasshopper_w128_t *) current_in; - currentOutputBlock = (grasshopper_w128_t *) current_out; + grasshopper_w128_t *currentInputBlock = (grasshopper_w128_t *) current_in; + grasshopper_w128_t *currentOutputBlock = (grasshopper_w128_t *) current_out; if (encrypting) { grasshopper_append128(currentBlock, currentInputBlock); grasshopper_encrypt_block(&c->encrypt_round_keys, currentBlock, @@ -379,11 +414,12 @@ int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out, return 1; } -void inc_counter(unsigned char *counter, size_t counter_bytes) { - unsigned char c; +void inc_counter(unsigned char *counter, size_t counter_bytes) +{ unsigned int n = counter_bytes; do { + unsigned char c; --n; c = counter[n]; ++c; @@ -394,14 +430,15 @@ void inc_counter(unsigned char *counter, size_t counter_bytes) { } /* increment counter (128-bit int) by 1 */ -static void ctr128_inc(unsigned char *counter) { +static void ctr128_inc(unsigned char *counter) +{ inc_counter(counter, 16); } -int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, size_t inl) { - gost_grasshopper_cipher_ctx_ctr *c = - (gost_grasshopper_cipher_ctx_ctr *) +static int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) +{ + gost_grasshopper_cipher_ctx_ctr *c = (gost_grasshopper_cipher_ctx_ctr *) EVP_CIPHER_CTX_get_cipher_data(ctx); unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx); const unsigned char *current_in = in; @@ -409,19 +446,21 @@ int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out, grasshopper_w128_t *currentInputBlock; grasshopper_w128_t *currentOutputBlock; unsigned int n = EVP_CIPHER_CTX_num(ctx); - size_t lasted; + size_t lasted = inl; size_t i; + size_t blocks; + grasshopper_w128_t *iv_buffer; + grasshopper_w128_t tmp; - while (n && inl) { + while (n && lasted) { *(current_out++) = *(current_in++) ^ c->partial_buffer.b[n]; - --inl; + --lasted; n = (n + 1) % GRASSHOPPER_BLOCK_SIZE; } EVP_CIPHER_CTX_set_num(ctx, n); - size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE; + blocks = lasted / GRASSHOPPER_BLOCK_SIZE; - grasshopper_w128_t *iv_buffer = (grasshopper_w128_t *) iv; - grasshopper_w128_t tmp; + iv_buffer = (grasshopper_w128_t *) iv; // full parts for (i = 0; i < blocks; i++) { @@ -434,10 +473,9 @@ int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out, ctr128_inc(iv_buffer->b); current_in += GRASSHOPPER_BLOCK_SIZE; current_out += GRASSHOPPER_BLOCK_SIZE; + lasted -= GRASSHOPPER_BLOCK_SIZE; } - // last part - lasted = inl - blocks * GRASSHOPPER_BLOCK_SIZE; if (lasted > 0) { currentInputBlock = (grasshopper_w128_t *) current_in; currentOutputBlock = (grasshopper_w128_t *) current_out; @@ -451,12 +489,13 @@ int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX *ctx, unsigned char *out, ctr128_inc(iv_buffer->b); } - return 1; + return inl; } #define GRASSHOPPER_BLOCK_MASK (GRASSHOPPER_BLOCK_SIZE - 1) static inline void apply_acpkm_grasshopper(gost_grasshopper_cipher_ctx_ctr * - ctx, unsigned int *num) { + ctx, unsigned int *num) +{ if (!ctx->section_size || (*num < ctx->section_size)) return; acpkm_next(&ctx->c); @@ -465,40 +504,42 @@ static inline void apply_acpkm_grasshopper(gost_grasshopper_cipher_ctx_ctr * /* If meshing is not configured via ctrl (setting section_size) * this function works exactly like plain ctr */ -int gost_grasshopper_cipher_do_ctracpkm(EVP_CIPHER_CTX *ctx, - unsigned char *out, - const unsigned char *in, - size_t inl) { - gost_grasshopper_cipher_ctx_ctr *c = - EVP_CIPHER_CTX_get_cipher_data(ctx); +static int gost_grasshopper_cipher_do_ctracpkm(EVP_CIPHER_CTX *ctx, + unsigned char *out, + const unsigned char *in, + size_t inl) +{ + gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx); unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx); unsigned int num = EVP_CIPHER_CTX_num(ctx); + size_t blocks, i, lasted = inl; + grasshopper_w128_t tmp; - while ((num & GRASSHOPPER_BLOCK_MASK) && inl) { + while ((num & GRASSHOPPER_BLOCK_MASK) && lasted) { *out++ = *in++ ^ c->partial_buffer.b[num & GRASSHOPPER_BLOCK_MASK]; - --inl; + --lasted; num++; } - size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE; - size_t i; - grasshopper_w128_t tmp; + blocks = lasted / GRASSHOPPER_BLOCK_SIZE; // full parts for (i = 0; i < blocks; i++) { apply_acpkm_grasshopper(c, &num); grasshopper_encrypt_block(&c->c.encrypt_round_keys, (grasshopper_w128_t *) iv, - (grasshopper_w128_t *) &c->partial_buffer, &c->c.buffer); - grasshopper_plus128(&tmp, &c->partial_buffer, (grasshopper_w128_t *) in); + (grasshopper_w128_t *) & c->partial_buffer, + &c->c.buffer); + grasshopper_plus128(&tmp, &c->partial_buffer, + (grasshopper_w128_t *) in); grasshopper_copy128((grasshopper_w128_t *) out, &tmp); ctr128_inc(iv); in += GRASSHOPPER_BLOCK_SIZE; out += GRASSHOPPER_BLOCK_SIZE; num += GRASSHOPPER_BLOCK_SIZE; + lasted -= GRASSHOPPER_BLOCK_SIZE; } // last part - size_t lasted = inl - blocks * GRASSHOPPER_BLOCK_SIZE; if (lasted > 0) { apply_acpkm_grasshopper(c, &num); grasshopper_encrypt_block(&c->c.encrypt_round_keys, @@ -511,25 +552,54 @@ int gost_grasshopper_cipher_do_ctracpkm(EVP_CIPHER_CTX *ctx, } EVP_CIPHER_CTX_set_num(ctx, num); - return 1; + return inl; } +static int gost_grasshopper_cipher_do_ctracpkm_omac(EVP_CIPHER_CTX *ctx, + unsigned char *out, + const unsigned char *in, + size_t inl) +{ + int result; + gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx); + /* As in and out can be the same pointer, process unencrypted here */ + if (EVP_CIPHER_CTX_encrypting(ctx)) + EVP_DigestSignUpdate(c->omac_ctx, in, inl); + + if (in == NULL && inl == 0) { /* Final call */ + return gost2015_final_call(ctx, c->omac_ctx, KUZNYECHIK_MAC_MAX_SIZE, c->tag, gost_grasshopper_cipher_do_ctracpkm); + } + + if (in == NULL) { + GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_DO_CTRACPKM_OMAC, ERR_R_EVP_LIB); + return -1; + } + result = gost_grasshopper_cipher_do_ctracpkm(ctx, out, in, inl); + + /* As in and out can be the same pointer, process decrypted here */ + if (!EVP_CIPHER_CTX_encrypting(ctx)) + EVP_DigestSignUpdate(c->omac_ctx, out, inl); + + return result; +} /* * Fixed 128-bit IV implementation make shift regiser redundant. */ -static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx_ofb * ctx, +static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx * ctx, grasshopper_w128_t * iv, - grasshopper_w128_t * buf) { - memcpy(&ctx->buffer1, iv, 16); - grasshopper_encrypt_block(&ctx->c.encrypt_round_keys, &ctx->buffer1, - buf, &ctx->c.buffer); + grasshopper_w128_t * buf) +{ + grasshopper_w128_t tmp; + memcpy(&tmp, iv, 16); + grasshopper_encrypt_block(&ctx->encrypt_round_keys, &tmp, + buf, &ctx->buffer); memcpy(iv, buf, 16); } -int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, size_t inl) { - gost_grasshopper_cipher_ctx_ofb *c = - (gost_grasshopper_cipher_ctx_ofb *) +static int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) +{ + gost_grasshopper_cipher_ctx *c = (gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx); const unsigned char *in_ptr = in; unsigned char *out_ptr = out; @@ -590,8 +660,9 @@ int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX *ctx, unsigned char *out, return 1; } -int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, size_t inl) { +static int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) +{ gost_grasshopper_cipher_ctx *c = (gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx); const unsigned char *in_ptr = in; @@ -616,8 +687,7 @@ int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out, } } if (j == GRASSHOPPER_BLOCK_SIZE) { - memcpy(iv, buf + GRASSHOPPER_BLOCK_SIZE, - GRASSHOPPER_BLOCK_SIZE); + memcpy(iv, buf + GRASSHOPPER_BLOCK_SIZE, GRASSHOPPER_BLOCK_SIZE); EVP_CIPHER_CTX_set_num(ctx, 0); } else { EVP_CIPHER_CTX_set_num(ctx, (int)j); @@ -676,67 +746,66 @@ int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out, return 1; } -int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX *ctx) { +static int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX *ctx) +{ gost_grasshopper_cipher_ctx *c = (gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx); if (!c) return 1; - struct GRASSHOPPER_CIPHER_PARAMS *params = &gost_cipher_params[c->type]; - - gost_grasshopper_cipher_destroy(c); - if (params->destroy_cipher != NULL) { - params->destroy_cipher(c); - } + if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CTR_MODE) + gost_grasshopper_cipher_destroy_ctr(c); EVP_CIPHER_CTX_set_app_data(ctx, NULL); return 1; } -int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX *ctx, - ASN1_TYPE *params) { - int len = 0; - unsigned char *buf = NULL; - ASN1_OCTET_STRING *os = NULL; +static int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params) +{ + if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CTR_MODE) { + gost_grasshopper_cipher_ctx_ctr *ctr = EVP_CIPHER_CTX_get_cipher_data(ctx); - os = ASN1_OCTET_STRING_new(); + /* CMS implies 256kb section_size */ + ctr->section_size = 256*1024; - if (!os || !ASN1_OCTET_STRING_set(os, buf, len)) { - OPENSSL_free(buf); - GOSTerr(GOST_F_GOST_GRASSHOPPER_SET_ASN1_PARAMETERS, - ERR_R_MALLOC_FAILURE); - return 0; + return gost2015_set_asn1_params(params, + EVP_CIPHER_CTX_original_iv(ctx), 8, ctr->kdf_seed); } - OPENSSL_free(buf); - - ASN1_TYPE_set(params, V_ASN1_SEQUENCE, os); - return 1; + return 0; } -GRASSHOPPER_INLINE int gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX - *ctx, - ASN1_TYPE - *params) { - int ret = -1; +static GRASSHOPPER_INLINE int +gost_grasshopper_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params) +{ + if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CTR_MODE) { + gost_grasshopper_cipher_ctx_ctr *ctr = EVP_CIPHER_CTX_get_cipher_data(ctx); - if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) { - return ret; - } + int iv_len = 16; + unsigned char iv[16]; - return 1; + if (gost2015_get_asn1_params(params, 16, iv, 8, ctr->kdf_seed) == 0) { + return 0; + } + + memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), iv, iv_len); + memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv, iv_len); + + /* CMS implies 256kb section_size */ + ctr->section_size = 256*1024; + return 1; + } + return 0; } -int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, - void *ptr) { +static int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) +{ switch (type) { case EVP_CTRL_RAND_KEY:{ - if (RAND_bytes - ((unsigned char *)ptr, - EVP_CIPHER_CTX_key_length(ctx)) <= 0) { - GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, - GOST_R_RNG_ERROR); + if (RAND_priv_bytes + ((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) { + GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, GOST_R_RNG_ERROR); return -1; } break; @@ -744,132 +813,129 @@ int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, case EVP_CTRL_KEY_MESH:{ gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx); - if (c->c.type != GRASSHOPPER_CIPHER_CTRACPKM || !arg - || (arg % GRASSHOPPER_BLOCK_SIZE)) + if ((c->c.type != GRASSHOPPER_CIPHER_CTRACPKM && + c->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC) + || (arg == 0) + || (arg % GRASSHOPPER_BLOCK_SIZE)) return -1; c->section_size = arg; break; } - default: - GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, - GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND); + case EVP_CTRL_TLSTREE: + { + unsigned char newkey[32]; + int mode = EVP_CIPHER_CTX_mode(ctx); + gost_grasshopper_cipher_ctx_ctr *ctr_ctx = NULL; + gost_grasshopper_cipher_ctx *c = NULL; + + unsigned char adjusted_iv[16]; + unsigned char seq[8]; + int j, carry, decrement_arg; + if (mode != EVP_CIPH_CTR_MODE) + return -1; + + ctr_ctx = (gost_grasshopper_cipher_ctx_ctr *) + EVP_CIPHER_CTX_get_cipher_data(ctx); + c = &(ctr_ctx->c); + + /* + * 'arg' parameter indicates what we should do with sequence value. + * + * When function called, seq is incremented after MAC calculation. + * In ETM mode, we use seq 'as is' in the ctrl-function (arg = 0) + * Otherwise we have to decrease it in the implementation (arg = 1). + */ + memcpy(seq, ptr, 8); + decrement_arg = arg; + if (!decrement_sequence(seq, decrement_arg)) + { + GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, GOST_R_CTRL_CALL_FAILED); + return -1; + } + + if (gost_tlstree(NID_grasshopper_cbc, c->master_key.k.b, newkey, + (const unsigned char *)seq) > 0) { + memset(adjusted_iv, 0, 16); + memcpy(adjusted_iv, EVP_CIPHER_CTX_original_iv(ctx), 8); + for(j=7,carry=0; j>=0; j--) + { + int adj_byte = adjusted_iv[j]+seq[j]+carry; + carry = (adj_byte > 255) ? 1 : 0; + adjusted_iv[j] = adj_byte & 0xFF; + } + EVP_CIPHER_CTX_set_num(ctx, 0); + memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), adjusted_iv, 16); + + gost_grasshopper_cipher_key(c, newkey); + return 1; + } + } return -1; - } - return 1; -} +#if 0 + case EVP_CTRL_AEAD_GET_TAG: + case EVP_CTRL_AEAD_SET_TAG: + { + int taglen = arg; + unsigned char *tag = ptr; + + gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx); + if (c->c.type != GRASSHOPPER_CIPHER_MGM) + return -1; -GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_create(int - cipher_type, - int - block_size) { - return EVP_CIPHER_meth_new(cipher_type, block_size /* block_size */ , - GRASSHOPPER_KEY_SIZE /* key_size */ ); -} + if (taglen > KUZNYECHIK_MAC_MAX_SIZE) { + CRYPTOCOMerr(CRYPTOCOM_F_GOST_GRASSHOPPER_CIPHER_CTL, + CRYPTOCOM_R_INVALID_TAG_LENGTH); + return -1; + } -const int cipher_gost_grasshopper_setup(EVP_CIPHER *cipher, uint8_t mode, - int iv_size, bool padding) { - return EVP_CIPHER_meth_set_iv_length(cipher, iv_size) - && EVP_CIPHER_meth_set_flags(cipher, - (unsigned long)(mode | - ((!padding) ? - EVP_CIPH_NO_PADDING : - 0) | ((iv_size > - 0) ? - EVP_CIPH_CUSTOM_IV - : 0) | - EVP_CIPH_RAND_KEY | - EVP_CIPH_ALWAYS_CALL_INIT) - ) - && EVP_CIPHER_meth_set_cleanup(cipher, - gost_grasshopper_cipher_cleanup) - && EVP_CIPHER_meth_set_set_asn1_params(cipher, - gost_grasshopper_set_asn1_parameters) - && EVP_CIPHER_meth_set_get_asn1_params(cipher, - gost_grasshopper_get_asn1_parameters) - && EVP_CIPHER_meth_set_ctrl(cipher, gost_grasshopper_cipher_ctl) - && EVP_CIPHER_meth_set_do_cipher(cipher, - gost_grasshopper_cipher_do); -} + if (type == EVP_CTRL_AEAD_GET_TAG) + memcpy(tag, c->final_tag, taglen); + else + memcpy(c->final_tag, tag, taglen); -const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper(uint8_t mode, - uint8_t num) { - EVP_CIPHER **cipher; - struct GRASSHOPPER_CIPHER_PARAMS *params; + return 1; + } +#endif + case EVP_CTRL_PROCESS_UNPROTECTED: + { + STACK_OF(X509_ATTRIBUTE) *x = ptr; + gost_grasshopper_cipher_ctx_ctr *c = EVP_CIPHER_CTX_get_cipher_data(ctx); - cipher = &gost_grasshopper_ciphers[num]; + if (c->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC) + return -1; - if (*cipher == NULL) { - params = &gost_cipher_params[num]; + return gost2015_process_unprotected_attributes(x, arg, KUZNYECHIK_MAC_MAX_SIZE, c->tag); + } + return 1; + case EVP_CTRL_COPY: { + EVP_CIPHER_CTX *out = ptr; - int nid = params->nid; - grasshopper_init_cipher_func init_cipher = params->init_cipher; - int block_size = params->block_size; - int ctx_size = params->ctx_size; - int iv_size = params->iv_size; - bool padding = params->padding; + gost_grasshopper_cipher_ctx_ctr *out_cctx = EVP_CIPHER_CTX_get_cipher_data(out); + gost_grasshopper_cipher_ctx_ctr *in_cctx = EVP_CIPHER_CTX_get_cipher_data(ctx); - *cipher = cipher_gost_grasshopper_create(nid, block_size); - if (*cipher == NULL) { - return NULL; - } + if (in_cctx->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC) + return -1; - if (!cipher_gost_grasshopper_setup(*cipher, mode, iv_size, padding) - || !EVP_CIPHER_meth_set_init(*cipher, init_cipher) - || !EVP_CIPHER_meth_set_impl_ctx_size(*cipher, ctx_size)) { - EVP_CIPHER_meth_free(*cipher); - *cipher = NULL; + if (in_cctx->omac_ctx == out_cctx->omac_ctx) { + out_cctx->omac_ctx = EVP_MD_CTX_new(); + if (out_cctx->omac_ctx == NULL) { + GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, ERR_R_MALLOC_FAILURE); + return -1; + } } + return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx); } - - return *cipher; -} - -const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ecb() { - return cipher_gost_grasshopper(EVP_CIPH_ECB_MODE, - GRASSHOPPER_CIPHER_ECB); -} - -const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_cbc() { - return cipher_gost_grasshopper(EVP_CIPH_CBC_MODE, - GRASSHOPPER_CIPHER_CBC); -} - -const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ofb() { - return cipher_gost_grasshopper(EVP_CIPH_OFB_MODE, - GRASSHOPPER_CIPHER_OFB); -} - -const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_cfb() { - return cipher_gost_grasshopper(EVP_CIPH_CFB_MODE, - GRASSHOPPER_CIPHER_CFB); -} - -const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctr() { - return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, - GRASSHOPPER_CIPHER_CTR); -} - -const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctracpkm() { - return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, - GRASSHOPPER_CIPHER_CTRACPKM); -} - -void cipher_gost_grasshopper_destroy(void) { - EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_ECB]); - gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_ECB] = NULL; - EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CBC]); - gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CBC] = NULL; - EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_OFB]); - gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_OFB] = NULL; - EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CFB]); - gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CFB] = NULL; - EVP_CIPHER_meth_free(gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTR]); - gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTR] = NULL; - EVP_CIPHER_meth_free(gost_grasshopper_ciphers - [GRASSHOPPER_CIPHER_CTRACPKM]); - gost_grasshopper_ciphers[GRASSHOPPER_CIPHER_CTRACPKM] = NULL; + default: + GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, + GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND); + return -1; + } + return 1; } -#if defined(__cplusplus) +/* Called directly by CMAC_ACPKM_Init() */ +const GRASSHOPPER_INLINE EVP_CIPHER *cipher_gost_grasshopper_ctracpkm() +{ + return GOST_init_cipher(&grasshopper_ctr_acpkm_cipher); } -#endif +/* vim: set expandtab cinoptions=\:0,l1,t0,g0,(0 sw=4 : */