/*
* Maxim Tishkov 2016
+ * Copyright (c) 2020 Vitaly Chikunov <vt@altlinux.org>
* This file is distributed under the same license as OpenSSL
*/
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
#include "gost_grasshopper_cipher.h"
#include "gost_grasshopper_defines.h"
#include "gost_grasshopper_math.h"
#include "gost_grasshopper_core.h"
+#include "gost_gost2015.h"
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <string.h>
+#include "gost_lcl.h"
#include "e_gost_err.h"
enum GRASSHOPPER_CIPHER_TYPE {
GRASSHOPPER_CIPHER_CBC,
GRASSHOPPER_CIPHER_OFB,
GRASSHOPPER_CIPHER_CFB,
- GRASSHOPPER_CIPHER_CTR
+ GRASSHOPPER_CIPHER_CTR,
+ GRASSHOPPER_CIPHER_CTRACPKM,
+ GRASSHOPPER_CIPHER_CTRACPKMOMAC,
+ GRASSHOPPER_CIPHER_MGM,
+};
+
+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,
+};
+
+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,
+};
+
+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,
};
-static EVP_CIPHER* gost_grasshopper_ciphers[5] = {
- [GRASSHOPPER_CIPHER_ECB] = NULL,
- [GRASSHOPPER_CIPHER_CBC] = NULL,
- [GRASSHOPPER_CIPHER_OFB] = NULL,
- [GRASSHOPPER_CIPHER_CFB] = NULL,
- [GRASSHOPPER_CIPHER_CTR] = NULL
+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),
};
-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_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),
};
-static struct GRASSHOPPER_CIPHER_PARAMS gost_cipher_params[5] = {
- [GRASSHOPPER_CIPHER_ECB] = {
- NID_grasshopper_ecb,
- gost_grasshopper_cipher_init_ecb,
- gost_grasshopper_cipher_do_ecb,
- NULL,
- 16,
- sizeof(gost_grasshopper_cipher_ctx),
- 0,
- true
- },
- [GRASSHOPPER_CIPHER_CBC] = {
- NID_grasshopper_cbc,
- gost_grasshopper_cipher_init_cbc,
- gost_grasshopper_cipher_do_cbc,
- NULL,
- 16,
- sizeof(gost_grasshopper_cipher_ctx),
- 16,
- true
- },
- [GRASSHOPPER_CIPHER_OFB] = {
- NID_grasshopper_ofb,
- gost_grasshopper_cipher_init_ofb,
- gost_grasshopper_cipher_do_ofb,
- gost_grasshopper_cipher_destroy_ofb,
- 1,
- sizeof(gost_grasshopper_cipher_ctx_ofb),
- 16,
- false
- },
- [GRASSHOPPER_CIPHER_CFB] = {
- NID_grasshopper_cfb,
- gost_grasshopper_cipher_init_cfb,
- gost_grasshopper_cipher_do_cfb,
- NULL,
- 1,
- sizeof(gost_grasshopper_cipher_ctx),
- 16,
- false
- },
- [GRASSHOPPER_CIPHER_CTR] = {
- NID_grasshopper_ctr,
- gost_grasshopper_cipher_init_ctr,
- gost_grasshopper_cipher_do_ctr,
- gost_grasshopper_cipher_destroy_ctr,
- 1,
- sizeof(gost_grasshopper_cipher_ctx_ctr),
- 8,
- false
- },
+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),
};
+GOST_cipher grasshopper_mgm_cipher = {
+ .nid = NID_undef,
+ .template = &grasshopper_template_cipher,
+ .block_size = 1,
+ .iv_len = 16,
+ .flags = EVP_CIPH_NO_PADDING |
+ EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER |
+ EVP_CIPH_CTRL_INIT | EVP_CIPH_FLAG_AEAD_CIPHER,
+ .cleanup = gost_grasshopper_mgm_cleanup,
+ .ctrl = gost_grasshopper_mgm_ctrl,
+ .init = gost_grasshopper_cipher_init_mgm,
+ .do_cipher = gost_grasshopper_cipher_do_mgm,
+ .ctx_size = sizeof(gost_mgm_ctx)
+};
+
+static void kuznyechik_NID_callback (int nid)
+{
+ grasshopper_mgm_cipher.nid = nid;
+}
+
+GOST_NID_JOB kuznyechik_mgm_NID = {
+ .sn = SN_kuznyechik_mgm,
+ .ln = SN_kuznyechik_mgm,
+ .callback = kuznyechik_NID_callback,
+};
+
+/* first 256 bit of D from draft-irtf-cfrg-re-keying-12 */
+static const unsigned char ACPKM_D_2018[] = {
+ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 64 bit */
+ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 128 bit */
+ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 256 bit */
+};
+
+static void acpkm_next(gost_grasshopper_cipher_ctx * c)
+{
+ unsigned char newkey[GRASSHOPPER_KEY_SIZE];
+ const int J = GRASSHOPPER_KEY_SIZE / GRASSHOPPER_BLOCK_SIZE;
+ int n;
+
+ for (n = 0; n < J; n++) {
+ const unsigned char *D_n = &ACPKM_D_2018[n * GRASSHOPPER_BLOCK_SIZE];
+
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) D_n,
+ (grasshopper_w128_t *) & newkey[n *
+ GRASSHOPPER_BLOCK_SIZE],
+ &c->buffer);
+ }
+ gost_grasshopper_cipher_key(c, newkey);
+}
+
/* Set 256 bit key into context */
-static GRASSHOPPER_INLINE void gost_grasshopper_cipher_key(gost_grasshopper_cipher_ctx* c, const uint8_t* k) {
- int i;
+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_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 */
-static GRASSHOPPER_INLINE void gost_grasshopper_cipher_destroy(gost_grasshopper_cipher_ctx* c) {
- int i;
+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]);
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;
-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 (ctx->omac_ctx)
+ EVP_MD_CTX_free(ctx->omac_ctx);
- grasshopper_zero128(&ctx->iv_buffer);
grasshopper_zero128(&ctx->partial_buffer);
-
- ctx->counter = 0;
}
-static int gost_grasshopper_cipher_init(EVP_CIPHER_CTX* ctx, const unsigned char* key,
- const unsigned char* iv, int enc) {
- gost_grasshopper_cipher_ctx* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
+static int gost_grasshopper_cipher_init(EVP_CIPHER_CTX *ctx,
+ const unsigned char *key,
+ const unsigned char *iv, int enc)
+{
+ gost_grasshopper_cipher_ctx *c = EVP_CIPHER_CTX_get_cipher_data(ctx);
if (EVP_CIPHER_CTX_get_app_data(ctx) == NULL) {
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) {
- memcpy((unsigned char*) EVP_CIPHER_CTX_original_iv(ctx), iv,
+ memcpy((unsigned char *)EVP_CIPHER_CTX_original_iv(ctx), iv,
EVP_CIPHER_CTX_iv_length(ctx));
}
memcpy(EVP_CIPHER_CTX_iv_noconst(ctx),
- EVP_CIPHER_CTX_original_iv(ctx),
- EVP_CIPHER_CTX_iv_length(ctx));
+ EVP_CIPHER_CTX_original_iv(ctx), EVP_CIPHER_CTX_iv_length(ctx));
grasshopper_zero128(&c->buffer);
return 1;
}
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ecb(EVP_CIPHER_CTX* ctx, const unsigned char* key,
- const unsigned char* iv,
- int enc) {
- gost_grasshopper_cipher_ctx* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
+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);
}
-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);
+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);
}
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_init_ofb(EVP_CIPHER_CTX* ctx, const unsigned char* key,
- const unsigned char* iv,
- int enc) {
- gost_grasshopper_cipher_ctx_ofb* c = EVP_CIPHER_CTX_get_cipher_data(ctx);
-
- 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);
}
-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);
+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);
}
-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);
+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);
- grasshopper_zero128(&c->iv_buffer);
grasshopper_zero128(&c->partial_buffer);
- c->counter = 0;
+ return gost_grasshopper_cipher_init(ctx, key, iv, enc);
+}
+
+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;
+ EVP_CIPHER_CTX_set_num(ctx, 0);
+ c->section_size = 4096;
return gost_grasshopper_cipher_init(ctx, key, iv, enc);
}
-static GRASSHOPPER_INLINE int gost_grasshopper_cipher_do(EVP_CIPHER_CTX* ctx, unsigned char* out,
- const unsigned char* in, size_t inl) {
- gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
- struct GRASSHOPPER_CIPHER_PARAMS* params = &gost_cipher_params[c->type];
+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);
+}
+
+// TODO: const *in, const *c
+void gost_grasshopper_encrypt_wrap(unsigned char *in, unsigned char *out,
+ gost_grasshopper_cipher_ctx *c) {
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) in,
+ (grasshopper_w128_t *) out,
+ &c->buffer);
+}
+
+
+
+/* ----------------------------------------------------------------------------------------------- */
+/*! Функция реализует операцию умножения двух элементов конечного поля \f$ \mathbb F_{2^{128}}\f$,
+ порожденного неприводимым многочленом
+ \f$ f(x) = x^{128} + x^7 + x^2 + x + 1 \in \mathbb F_2[x]\f$. Для умножения используется
+ простейшая реализация, основанная на приведении по модулю после каждого шага алгоритма. */
+/* ----------------------------------------------------------------------------------------------- */
+static void gf128_mul_uint64 (uint64_t *result, uint64_t *arg1, uint64_t *arg2)
+{
+ int i = 0;
+ register uint64_t t, X0, X1;
+ uint64_t Z0 = 0, Z1 = 0;
+
+#ifdef L_ENDIAN
+ X0 = BSWAP64(*(arg1 + 1));
+ X1 = BSWAP64(*arg1);
+#else
+ X0 = *(arg1 + 1);
+ X1 = *arg1;
+#endif
+
+ //first 64 bits of arg1
+#ifdef L_ENDIAN
+ t = BSWAP64(*(arg2 + 1));
+#else
+ t = *(arg2 + 1);
+#endif
+
+ for (i = 0; i < 64; i++) {
+ if (t & 0x1) {
+ Z0 ^= X0;
+ Z1 ^= X1;
+ }
+ t >>= 1;
+ if (X1 & 0x8000000000000000) {
+ X1 <<= 1;
+ X1 ^= X0>>63;
+ X0 <<= 1;
+ X0 ^= 0x87;
+ }
+ else {
+ X1 <<= 1;
+ X1 ^= X0>>63;
+ X0 <<= 1;
+ }
+ }
+
+ //second 64 bits of arg2
+#ifdef L_ENDIAN
+ t = BSWAP64(*arg2);
+#else
+ t = *arg2;
+#endif
+
+ for (i = 0; i < 63; i++) {
+ if (t & 0x1) {
+ Z0 ^= X0;
+ Z1 ^= X1;
+ }
+ t >>= 1;
+ if (X1 & 0x8000000000000000) {
+ X1 <<= 1;
+ X1 ^= X0>>63;
+ X0 <<= 1;
+ X0 ^= 0x87;
+ }
+ else {
+ X1 <<= 1;
+ X1 ^= X0>>63;
+ X0 <<= 1;
+ }
+ }
+
+ if (t & 0x1) {
+ Z0 ^= X0;
+ Z1 ^= X1;
+ }
+
+#ifdef L_ENDIAN
+ result[0] = BSWAP64(Z1);
+ result[1] = BSWAP64(Z0);
+#else
+ result[0] = Z1;
+ result[1] = Z0;
+#endif
+}
+
+static GRASSHOPPER_INLINE int
+gost_grasshopper_cipher_init_mgm(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc)
+{
+ gost_mgm_ctx *mctx =
+ (gost_mgm_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
+ int bl;
+
+ if (!iv && !key)
+ return 1;
+ if (key) {
+ bl = EVP_CIPHER_CTX_iv_length(ctx);
+ gost_grasshopper_cipher_key(&mctx->ks.gh_ks, key);
+ gost_mgm128_init(&mctx->mgm, &mctx->ks,
+ (block128_f) gost_grasshopper_encrypt_wrap, gf128_mul_uint64, bl);
+
+ /*
+ * If we have an iv can set it directly, otherwise use saved IV.
+ */
+ if (iv == NULL && mctx->iv_set)
+ iv = mctx->iv;
+ if (iv) {
+ if (gost_mgm128_setiv(&mctx->mgm, iv, mctx->ivlen) != 1)
+ return 0;
+ mctx->iv_set = 1;
+ }
+ mctx->key_set = 1;
+ } else {
+ /* If key set use IV, otherwise copy */
+ if (mctx->key_set) {
+ if (gost_mgm128_setiv(&mctx->mgm, iv, mctx->ivlen) != 1)
+ return 0;
+ }
+ else
+ memcpy(mctx->iv, iv, mctx->ivlen);
+ mctx->iv_set = 1;
+ }
+ return 1;
}
-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);
+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);
- const unsigned char* current_in = in;
- unsigned char* current_out = out;
+ const unsigned char *current_in = in;
+ unsigned char *current_out = out;
size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
size_t i;
- for (i = 0; i < blocks; i++, current_in += GRASSHOPPER_BLOCK_SIZE, current_out += GRASSHOPPER_BLOCK_SIZE) {
+ for (i = 0; i < blocks;
+ i++, current_in += GRASSHOPPER_BLOCK_SIZE, current_out +=
+ GRASSHOPPER_BLOCK_SIZE) {
if (encrypting) {
- grasshopper_encrypt_block(&c->encrypt_round_keys, (grasshopper_w128_t*) current_in,
- (grasshopper_w128_t*) current_out,
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) current_in,
+ (grasshopper_w128_t *) current_out,
&c->buffer);
} else {
- grasshopper_decrypt_block(&c->decrypt_round_keys, (grasshopper_w128_t*) current_in,
- (grasshopper_w128_t*) current_out,
+ grasshopper_decrypt_block(&c->decrypt_round_keys,
+ (grasshopper_w128_t *) current_in,
+ (grasshopper_w128_t *) current_out,
&c->buffer);
}
}
return 1;
}
-static int gost_grasshopper_cipher_do_cbc(EVP_CIPHER_CTX* ctx, unsigned char* out,
- const unsigned char* in, size_t inl) {
- gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
- unsigned char* iv = EVP_CIPHER_CTX_iv_noconst(ctx);
+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;
+ const unsigned char *current_in = in;
+ unsigned char *current_out = out;
size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
size_t i;
- grasshopper_w128_t* currentBlock;
+ grasshopper_w128_t *currentBlock;
- currentBlock = (grasshopper_w128_t*) iv;
+ currentBlock = (grasshopper_w128_t *) iv;
- for (i = 0; i < blocks; i++, current_in += GRASSHOPPER_BLOCK_SIZE, current_out += GRASSHOPPER_BLOCK_SIZE) {
- currentInputBlock = (grasshopper_w128_t*) current_in;
- currentOutputBlock = (grasshopper_w128_t*) current_out;
+ for (i = 0; i < blocks;
+ i++, current_in += GRASSHOPPER_BLOCK_SIZE, current_out +=
+ GRASSHOPPER_BLOCK_SIZE) {
+ grasshopper_w128_t *currentInputBlock = (grasshopper_w128_t *) current_in;
+ grasshopper_w128_t *currentOutputBlock = (grasshopper_w128_t *) current_out;
if (encrypting) {
grasshopper_append128(currentBlock, currentInputBlock);
- grasshopper_encrypt_block(&c->encrypt_round_keys, currentBlock, currentOutputBlock, &c->buffer);
+ grasshopper_encrypt_block(&c->encrypt_round_keys, currentBlock,
+ currentOutputBlock, &c->buffer);
grasshopper_copy128(currentBlock, currentOutputBlock);
} else {
- grasshopper_decrypt_block(&c->decrypt_round_keys, currentInputBlock, currentOutputBlock, &c->buffer);
+ grasshopper_w128_t tmp;
+
+ grasshopper_copy128(&tmp, currentInputBlock);
+ grasshopper_decrypt_block(&c->decrypt_round_keys,
+ currentInputBlock, currentOutputBlock,
+ &c->buffer);
grasshopper_append128(currentOutputBlock, currentBlock);
- grasshopper_copy128(currentBlock, currentInputBlock);
+ grasshopper_copy128(currentBlock, &tmp);
}
}
return 1;
}
-static int gost_grasshopper_cipher_do_ctr(EVP_CIPHER_CTX* ctx, unsigned char* out,
- const unsigned char* in, size_t inl) {
- gost_grasshopper_cipher_ctx_ctr* c = (gost_grasshopper_cipher_ctx_ctr*) EVP_CIPHER_CTX_get_cipher_data(ctx);
- unsigned char* iv = EVP_CIPHER_CTX_iv_noconst(ctx);
- const unsigned char* current_in = in;
- unsigned char* current_out = out;
- size_t blocks = inl / GRASSHOPPER_BLOCK_SIZE;
- grasshopper_w128_t* currentInputBlock;
- grasshopper_w128_t* currentOutputBlock;
- size_t lasted;
+void inc_counter(unsigned char *counter, size_t counter_bytes)
+{
+ unsigned int n = counter_bytes;
+
+ do {
+ unsigned char c;
+ --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 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 = inl;
size_t i;
+ size_t blocks;
+ grasshopper_w128_t *iv_buffer;
+ grasshopper_w128_t tmp;
+
+ while (n && lasted) {
+ *(current_out++) = *(current_in++) ^ c->partial_buffer.b[n];
+ --lasted;
+ n = (n + 1) % GRASSHOPPER_BLOCK_SIZE;
+ }
+ EVP_CIPHER_CTX_set_num(ctx, n);
+ blocks = lasted / GRASSHOPPER_BLOCK_SIZE;
- memcpy(&c->iv_buffer, iv, 8);
+ 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;
- memcpy(c->iv_buffer.b + 8, &c->counter, 8);
- grasshopper_encrypt_block(&c->c.encrypt_round_keys, &c->iv_buffer, currentOutputBlock, &c->c.buffer);
- grasshopper_append128(currentOutputBlock, currentInputBlock);
- c->counter += 1;
+ currentInputBlock = (grasshopper_w128_t *) current_in;
+ currentOutputBlock = (grasshopper_w128_t *) current_out;
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, iv_buffer,
+ &c->partial_buffer, &c->c.buffer);
+ grasshopper_plus128(&tmp, &c->partial_buffer, currentInputBlock);
+ grasshopper_copy128(currentOutputBlock, &tmp);
+ ctr128_inc(iv_buffer->b);
current_in += GRASSHOPPER_BLOCK_SIZE;
current_out += GRASSHOPPER_BLOCK_SIZE;
+ 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;
- memcpy(c->iv_buffer.b + 8, &c->counter, 8);
- grasshopper_encrypt_block(&c->c.encrypt_round_keys, &c->iv_buffer, &c->partial_buffer, &c->c.buffer);
+ currentInputBlock = (grasshopper_w128_t *) current_in;
+ currentOutputBlock = (grasshopper_w128_t *) current_out;
+ grasshopper_encrypt_block(&c->c.encrypt_round_keys, iv_buffer,
+ &c->partial_buffer, &c->c.buffer);
for (i = 0; i < lasted; i++) {
- currentOutputBlock->b[i] = c->partial_buffer.b[i] ^ currentInputBlock->b[i];
+ currentOutputBlock->b[i] =
+ c->partial_buffer.b[i] ^ currentInputBlock->b[i];
}
- c->counter += 1;
+ EVP_CIPHER_CTX_set_num(ctx, i);
+ 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)
+{
+ if (!ctx->section_size || (*num < ctx->section_size))
+ return;
+ acpkm_next(&ctx->c);
+ *num &= GRASSHOPPER_BLOCK_MASK;
}
-static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx_ofb* ctx, grasshopper_w128_t* iv,
- grasshopper_w128_t* buf) {
- memcpy(&ctx->buffer1, iv, 16);
- ctx->g = ctx->buffer1.b[0] | (ctx->buffer1.b[1] << 8) | (ctx->buffer1.b[2] << 16) |
- ((uint32_t) ctx->buffer1.b[3] << 24);
- ctx->g += 0x01010101;
- ctx->buffer1.b[0] = (unsigned char) (ctx->g & 0xff);
- ctx->buffer1.b[1] = (unsigned char) ((ctx->g >> 8) & 0xff);
- ctx->buffer1.b[2] = (unsigned char) ((ctx->g >> 16) & 0xff);
- ctx->buffer1.b[3] = (unsigned char) ((ctx->g >> 24) & 0xff);
- ctx->g = ctx->buffer1.b[4] | (ctx->buffer1.b[5] << 8) | (ctx->buffer1.b[6] << 16) |
- ((uint32_t) ctx->buffer1.b[7] << 24);
- ctx->go = ctx->g;
- ctx->g += 0x01010104;
- if (ctx->go > ctx->g) { /* overflow */
- ctx->g++;
- }
- ctx->buffer1.b[4] = (unsigned char) (ctx->g & 0xff);
- ctx->buffer1.b[5] = (unsigned char) ((ctx->g >> 8) & 0xff);
- ctx->buffer1.b[6] = (unsigned char) ((ctx->g >> 16) & 0xff);
- ctx->buffer1.b[7] = (unsigned char) ((ctx->g >> 24) & 0xff);
- ctx->g = ctx->buffer1.b[8] | (ctx->buffer1.b[9] << 8) | (ctx->buffer1.b[10] << 16) |
- ((uint32_t) ctx->buffer1.b[11] << 24);
- ctx->go = ctx->g;
- ctx->g += 0x01010107;
- if (ctx->go > ctx->g) { /* overflow */
- ctx->g++;
- }
- ctx->buffer1.b[8] = (unsigned char) (ctx->g & 0xff);
- ctx->buffer1.b[9] = (unsigned char) ((ctx->g >> 8) & 0xff);
- ctx->buffer1.b[10] = (unsigned char) ((ctx->g >> 16) & 0xff);
- ctx->buffer1.b[11] = (unsigned char) ((ctx->g >> 24) & 0xff);
- ctx->g = ctx->buffer1.b[12] | (ctx->buffer1.b[13] << 8) | (ctx->buffer1.b[14] << 16) |
- ((uint32_t) ctx->buffer1.b[15] << 24);
- ctx->go = ctx->g;
- ctx->g += 0x01010110;
- if (ctx->go > ctx->g) { /* overflow */
- ctx->g++;
- }
- ctx->buffer1.b[12] = (unsigned char) (ctx->g & 0xff);
- ctx->buffer1.b[13] = (unsigned char) ((ctx->g >> 8) & 0xff);
- ctx->buffer1.b[14] = (unsigned char) ((ctx->g >> 16) & 0xff);
- ctx->buffer1.b[15] = (unsigned char) ((ctx->g >> 24) & 0xff);
- memcpy(iv, &ctx->buffer1, 16);
- grasshopper_encrypt_block(&ctx->c.encrypt_round_keys, &ctx->buffer1, buf, &ctx->c.buffer);
-}
-
-static int gost_grasshopper_cipher_do_ofb(EVP_CIPHER_CTX* ctx, unsigned char* out,
- const unsigned char* in, size_t inl) {
- gost_grasshopper_cipher_ctx_ofb* c = (gost_grasshopper_cipher_ctx_ofb*) EVP_CIPHER_CTX_get_cipher_data(ctx);
- const unsigned char* in_ptr = in;
- unsigned char* out_ptr = out;
- unsigned char* buf = EVP_CIPHER_CTX_buf_noconst(ctx);
- unsigned char* iv = EVP_CIPHER_CTX_iv_noconst(ctx);
+/* If meshing is not configured via ctrl (setting section_size)
+ * this function works exactly like plain ctr */
+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) && lasted) {
+ *out++ = *in++ ^ c->partial_buffer.b[num & GRASSHOPPER_BLOCK_MASK];
+ --lasted;
+ num++;
+ }
+ 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_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
+ 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 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;
+}
+
+
+
+static int gost_grasshopper_cipher_do_mgm(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t len)
+{
+ gost_mgm_ctx *mctx =
+ (gost_mgm_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
+ int enc = EVP_CIPHER_CTX_encrypting(ctx);
+
+ /* If not set up, return error */
+ if (!mctx->key_set) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_DO_MGM,
+ GOST_R_BAD_ORDER);
+ return -1;
+ }
+
+ if (!mctx->iv_set) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_DO_MGM,
+ GOST_R_BAD_ORDER);
+ return -1;
+ }
+ if (in) {
+ if (out == NULL) {
+ if (gost_mgm128_aad(&mctx->mgm, in, len))
+ return -1;
+ } else if (enc) {
+ if (gost_mgm128_encrypt(&mctx->mgm, in, out, len))
+ return -1;
+ } else {
+ if (gost_mgm128_decrypt(&mctx->mgm, in, out, len))
+ return -1;
+ }
+ return len;
+ } else {
+ if (!enc) {
+ if (mctx->taglen < 0)
+ return -1;
+ if (gost_mgm128_finish(&mctx->mgm,
+ EVP_CIPHER_CTX_buf_noconst(ctx),
+ mctx->taglen) != 0)
+ return -1;
+ mctx->iv_set = 0;
+ return 0;
+ }
+ gost_mgm128_tag(&mctx->mgm, EVP_CIPHER_CTX_buf_noconst(ctx), 16);
+ mctx->taglen = 16;
+ /* Don't reuse the IV */
+ mctx->iv_set = 0;
+ return 0;
+ }
+
+}
+
+/*
+ * Fixed 128-bit IV implementation make shift regiser redundant.
+ */
+static void gost_grasshopper_cnt_next(gost_grasshopper_cipher_ctx * ctx,
+ grasshopper_w128_t * iv,
+ 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);
+}
+
+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;
+ unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
+ unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
int num = EVP_CIPHER_CTX_num(ctx);
size_t i = 0;
size_t j;
/* process partial block if any */
if (num > 0) {
- for (j = (size_t) num, i = 0; j < GRASSHOPPER_BLOCK_SIZE && i < inl;
+ for (j = (size_t)num, i = 0; j < GRASSHOPPER_BLOCK_SIZE && i < inl;
j++, i++, in_ptr++, out_ptr++) {
*out_ptr = buf[j] ^ (*in_ptr);
}
if (j == GRASSHOPPER_BLOCK_SIZE) {
EVP_CIPHER_CTX_set_num(ctx, 0);
} else {
- EVP_CIPHER_CTX_set_num(ctx, (int) j);
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
return 1;
}
}
for (; i + GRASSHOPPER_BLOCK_SIZE <
- inl; i += GRASSHOPPER_BLOCK_SIZE, in_ptr += GRASSHOPPER_BLOCK_SIZE, out_ptr += GRASSHOPPER_BLOCK_SIZE) {
+ inl;
+ i += GRASSHOPPER_BLOCK_SIZE, in_ptr +=
+ GRASSHOPPER_BLOCK_SIZE, out_ptr += GRASSHOPPER_BLOCK_SIZE) {
/*
* block cipher current iv
*/
/* Encrypt */
- gost_grasshopper_cnt_next(c, (grasshopper_w128_t*) iv, (grasshopper_w128_t*) buf);
+ gost_grasshopper_cnt_next(c, (grasshopper_w128_t *) iv,
+ (grasshopper_w128_t *) buf);
/*
* xor next block of input text with it and output it
/* Process rest of buffer */
if (i < inl) {
- gost_grasshopper_cnt_next(c, (grasshopper_w128_t*) iv, (grasshopper_w128_t*) buf);
+ gost_grasshopper_cnt_next(c, (grasshopper_w128_t *) iv,
+ (grasshopper_w128_t *) buf);
for (j = 0; i < inl; j++, i++) {
out_ptr[j] = buf[j] ^ in_ptr[j];
}
- EVP_CIPHER_CTX_set_num(ctx, (int) j);
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
} else {
EVP_CIPHER_CTX_set_num(ctx, 0);
}
return 1;
}
-static int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX* ctx, unsigned char* out,
- const unsigned char* in, size_t inl) {
- gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
- const unsigned char* in_ptr = in;
- unsigned char* out_ptr = out;
- unsigned char* buf = EVP_CIPHER_CTX_buf_noconst(ctx);
- unsigned char* iv = EVP_CIPHER_CTX_iv_noconst(ctx);
+static int gost_grasshopper_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ gost_grasshopper_cipher_ctx *c =
+ (gost_grasshopper_cipher_ctx *) EVP_CIPHER_CTX_get_cipher_data(ctx);
+ const unsigned char *in_ptr = in;
+ unsigned char *out_ptr = out;
+ unsigned char *buf = EVP_CIPHER_CTX_buf_noconst(ctx);
+ unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
bool encrypting = (bool) EVP_CIPHER_CTX_encrypting(ctx);
int num = EVP_CIPHER_CTX_num(ctx);
size_t i = 0;
/* process partial block if any */
if (num > 0) {
- for (j = (size_t) num, i = 0; j < GRASSHOPPER_BLOCK_SIZE && i < inl; j++, i++, in_ptr++, out_ptr++) {
+ for (j = (size_t)num, i = 0; j < GRASSHOPPER_BLOCK_SIZE && i < inl;
+ j++, i++, in_ptr++, out_ptr++) {
if (!encrypting) {
buf[j + GRASSHOPPER_BLOCK_SIZE] = *in_ptr;
}
memcpy(iv, buf + GRASSHOPPER_BLOCK_SIZE, GRASSHOPPER_BLOCK_SIZE);
EVP_CIPHER_CTX_set_num(ctx, 0);
} else {
- EVP_CIPHER_CTX_set_num(ctx, (int) j);
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
return 1;
}
}
for (; i + GRASSHOPPER_BLOCK_SIZE <
- inl; i += GRASSHOPPER_BLOCK_SIZE, in_ptr += GRASSHOPPER_BLOCK_SIZE, out_ptr += GRASSHOPPER_BLOCK_SIZE) {
+ inl;
+ i += GRASSHOPPER_BLOCK_SIZE, in_ptr +=
+ GRASSHOPPER_BLOCK_SIZE, out_ptr += GRASSHOPPER_BLOCK_SIZE) {
/*
* block cipher current iv
*/
- grasshopper_encrypt_block(&c->encrypt_round_keys, (grasshopper_w128_t*) iv, (grasshopper_w128_t*) buf,
- &c->buffer);
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) iv,
+ (grasshopper_w128_t *) buf, &c->buffer);
/*
* xor next block of input text with it and output it
*/
/* Process rest of buffer */
if (i < inl) {
- grasshopper_encrypt_block(&c->encrypt_round_keys, (grasshopper_w128_t*) iv, (grasshopper_w128_t*) buf,
- &c->buffer);
+ grasshopper_encrypt_block(&c->encrypt_round_keys,
+ (grasshopper_w128_t *) iv,
+ (grasshopper_w128_t *) buf, &c->buffer);
if (!encrypting) {
memcpy(buf + GRASSHOPPER_BLOCK_SIZE, in_ptr, inl - i);
}
for (j = 0; i < inl; j++, i++) {
out_ptr[j] = buf[j] ^ in_ptr[j];
}
- EVP_CIPHER_CTX_set_num(ctx, (int) j);
+ EVP_CIPHER_CTX_set_num(ctx, (int)j);
if (encrypting) {
memcpy(buf + GRASSHOPPER_BLOCK_SIZE, out_ptr, j);
}
return 1;
}
-static int gost_grasshopper_cipher_cleanup(EVP_CIPHER_CTX* ctx) {
- gost_grasshopper_cipher_ctx* c = (gost_grasshopper_cipher_ctx*) EVP_CIPHER_CTX_get_cipher_data(ctx);
- struct GRASSHOPPER_CIPHER_PARAMS* params = &gost_cipher_params[c->type];
+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);
- gost_grasshopper_cipher_destroy(c);
- if (params->destroy_cipher != NULL) {
- params->destroy_cipher(c);
- }
+ if (!c)
+ return 1;
+
+ 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;
}
-static int gost_grasshopper_set_asn1_parameters(EVP_CIPHER_CTX* ctx, ASN1_TYPE* params) {
- int len = 0;
- unsigned char* buf = NULL;
- unsigned char* p = NULL;
- ASN1_OCTET_STRING* os = NULL;
+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_GOST89_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;
}
-static 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);
+
+ int iv_len = 16;
+ unsigned char iv[16];
- if (ASN1_TYPE_get(params) != V_ASN1_SEQUENCE) {
- return ret;
+ 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;
+}
+static int gost_grasshopper_mgm_cleanup(EVP_CIPHER_CTX *c)
+{
+ gost_mgm_ctx *mctx =
+ (gost_mgm_ctx *)EVP_CIPHER_CTX_get_cipher_data(c);
+ if (mctx == NULL)
+ return 0;
+ gost_grasshopper_cipher_destroy(&mctx->ks.gh_ks);
+ OPENSSL_cleanse(&mctx->mgm, sizeof(mctx->mgm));
+ if (mctx->iv != EVP_CIPHER_CTX_iv_noconst(c))
+ OPENSSL_free(mctx->iv);
return 1;
}
-static int gost_grasshopper_cipher_ctl(EVP_CIPHER_CTX* ctx, int type, int arg, void* ptr) {
+static int gost_grasshopper_mgm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+{
+ gost_mgm_ctx *mctx =
+ (gost_mgm_ctx *)EVP_CIPHER_CTX_get_cipher_data(c);
+ unsigned char *buf, *iv;
+ int ivlen, enc;
+
+ switch (type) {
+ case EVP_CTRL_INIT:
+ ivlen = EVP_CIPHER_iv_length(EVP_CIPHER_CTX_cipher(c));
+ iv = EVP_CIPHER_CTX_iv_noconst(c);
+ mctx->key_set = 0;
+ mctx->iv_set = 0;
+ mctx->ivlen = ivlen;
+ mctx->iv = iv;
+ mctx->taglen = -1;
+ return 1;
+
+ case EVP_CTRL_GET_IVLEN:
+ *(int *)ptr = mctx->ivlen;
+ return 1;
+
+ case EVP_CTRL_AEAD_SET_IVLEN:
+ if (arg <= 0)
+ return 0;
+ if ((arg > EVP_MAX_IV_LENGTH) && (arg > mctx->ivlen)) {
+ // TODO: Allocate memory for IV or set error
+ return 0;
+ }
+ mctx->ivlen = arg;
+ return 1;
+
+ case EVP_CTRL_AEAD_SET_TAG:
+ buf = EVP_CIPHER_CTX_buf_noconst(c);
+ enc = EVP_CIPHER_CTX_encrypting(c);
+ if (arg <= 0 || arg != 16 || enc) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_MGM_CTRL,
+ GOST_R_INVALID_TAG_LENGTH);
+ return 0;
+ }
+ memcpy(buf, ptr, arg);
+ mctx->taglen = arg;
+ return 1;
+
+ case EVP_CTRL_AEAD_GET_TAG:
+ buf = EVP_CIPHER_CTX_buf_noconst(c);
+ enc = EVP_CIPHER_CTX_encrypting(c);
+ if (arg <= 0 || arg > 16 || !enc || mctx->taglen < 0) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_MGM_CTRL,
+ GOST_R_INVALID_TAG_LENGTH);
+ return 0;
+ }
+ memcpy(ptr, buf, arg);
+ return 1;
+
+ default:
+ return -1;
+ }
+}
+
+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_CIPHER_CTL, GOST_R_RNG_ERROR);
+ case EVP_CTRL_RAND_KEY:{
+ 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;
}
- default:
- GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
- return -1;
- }
- return 1;
-}
-
-static GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_create(int cipher_type, int block_size) {
- return EVP_CIPHER_meth_new(cipher_type,
- block_size /* block_size */,
- GRASSHOPPER_KEY_SIZE /* key_size */);
-}
-
-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);
-}
-
-static 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];
+ 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 &&
+ c->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC)
+ || (arg == 0)
+ || (arg % GRASSHOPPER_BLOCK_SIZE))
+ return -1;
+ c->section_size = arg;
+ break;
+ }
+ 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);
- if (*cipher == NULL) {
- params = &gost_cipher_params[num];
+ gost_grasshopper_cipher_key(c, newkey);
+ 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;
- 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;
+ if (taglen > KUZNYECHIK_MAC_MAX_SIZE) {
+ CRYPTOCOMerr(CRYPTOCOM_F_GOST_GRASSHOPPER_CIPHER_CTL,
+ CRYPTOCOM_R_INVALID_TAG_LENGTH);
+ return -1;
+ }
- *cipher = cipher_gost_grasshopper_create(nid, block_size);
- if (*cipher == NULL) {
- return NULL;
- }
+ if (type == EVP_CTRL_AEAD_GET_TAG)
+ memcpy(tag, c->final_tag, taglen);
+ else
+ memcpy(c->final_tag, tag, taglen);
- 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 1;
}
- }
-
- return *cipher;
-}
+#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);
-const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_ecb() {
- return cipher_gost_grasshopper(EVP_CIPH_ECB_MODE, GRASSHOPPER_CIPHER_ECB);
-}
+ if (c->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC)
+ return -1;
-const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_cbc() {
- return cipher_gost_grasshopper(EVP_CIPH_CBC_MODE, GRASSHOPPER_CIPHER_CBC);
-}
+ return gost2015_process_unprotected_attributes(x, arg, KUZNYECHIK_MAC_MAX_SIZE, c->tag);
+ }
+ case EVP_CTRL_COPY: {
+ EVP_CIPHER_CTX *out = ptr;
-const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_ofb() {
- return cipher_gost_grasshopper(EVP_CIPH_OFB_MODE, GRASSHOPPER_CIPHER_OFB);
-}
+ 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);
-const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_cfb() {
- return cipher_gost_grasshopper(EVP_CIPH_CFB_MODE, GRASSHOPPER_CIPHER_CFB);
-}
+ if (in_cctx->c.type != GRASSHOPPER_CIPHER_CTRACPKMOMAC)
+ return -1;
-const GRASSHOPPER_INLINE EVP_CIPHER* cipher_gost_grasshopper_ctr() {
- return cipher_gost_grasshopper(EVP_CIPH_CTR_MODE, GRASSHOPPER_CIPHER_CTR);
+ if (in_cctx->omac_ctx == out_cctx->omac_ctx) {
+ out_cctx->omac_ctx = EVP_MD_CTX_new();
+ if (out_cctx->omac_ctx == NULL) {
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL, ERR_R_MALLOC_FAILURE);
+ return -1;
+ }
+ }
+ return EVP_MD_CTX_copy(out_cctx->omac_ctx, in_cctx->omac_ctx);
+ }
+ default:
+ GOSTerr(GOST_F_GOST_GRASSHOPPER_CIPHER_CTL,
+ GOST_R_UNSUPPORTED_CIPHER_CTL_COMMAND);
+ return -1;
+ }
+ return 1;
}
-#if defined(__cplusplus)
+/* Called directly by CMAC_ACPKM_Init() */
+const 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 : */
projects / openssl-gost / engine.git / blobdiff