const unsigned char *in, size_t inl);
/* Cleanup function */
static int gost_cipher_cleanup(EVP_CIPHER_CTX *);
+static int gost_magma_mgm_cleanup(EVP_CIPHER_CTX *c);
/* set/get cipher parameters */
static int gost89_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
static int gost89_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
const unsigned char *iv, int enc);
static int magma_cipher_init_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
+static int gost_magma_cipher_init_mgm(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc);
/* Handles block of data in CBC mode */
static int magma_cipher_do_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
static int magma_cipher_do_ctr_acpkm_omac(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl);
-
+static int gost_magma_cipher_do_mgm(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t len);
/* set/get cipher parameters */
static int magma_set_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
static int magma_get_asn1_parameters(EVP_CIPHER_CTX *ctx, ASN1_TYPE *params);
/* Control function */
static int magma_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
static int magma_cipher_ctl_acpkm_omac(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
+static int gost_magma_mgm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
/*
* Single level template accessor.
int flags = c->flags | TPL_VAL(c, flags);
int block_size = TPL(c, block_size);
switch (flags & EVP_CIPH_MODE) {
- case EVP_CIPH_CTR_MODE:
- case EVP_CIPH_CFB_MODE:
- case EVP_CIPH_OFB_MODE:
- OPENSSL_assert(block_size == 1);
- OPENSSL_assert(flags & EVP_CIPH_NO_PADDING);
- break;
- default:
+ case EVP_CIPH_CBC_MODE:
+ case EVP_CIPH_ECB_MODE:
+ case EVP_CIPH_WRAP_MODE:
OPENSSL_assert(block_size != 1);
OPENSSL_assert(!(flags & EVP_CIPH_NO_PADDING));
+ break;
+ default:
+ OPENSSL_assert(block_size == 1);
+ OPENSSL_assert(flags & EVP_CIPH_NO_PADDING);
}
if (TPL(c, iv_len))
.do_cipher = magma_cipher_do_ecb,
};
+ GOST_cipher magma_mgm_cipher = {
+ .nid = NID_undef,
+ .template = &magma_template_cipher,
+ .block_size = 1,
+ .iv_len = 8,
+ .flags = EVP_CIPH_NO_PADDING |
+ EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER |
+ EVP_CIPH_CTRL_INIT | EVP_CIPH_FLAG_AEAD_CIPHER,
+ .init = gost_magma_cipher_init_mgm,
+ .do_cipher = gost_magma_cipher_do_mgm,
+ .ctrl = gost_magma_mgm_ctrl,
+ .cleanup = gost_magma_mgm_cleanup,
+ .ctx_size = sizeof(gost_mgm_ctx)
+ };
+
+static void magma_NID_callback (int nid)
+{
+ magma_mgm_cipher.nid = nid;
+}
+
+GOST_NID_JOB magma_mgm_NID = {
+ .sn = SN_magma_mgm,
+ .ln = SN_magma_mgm,
+ .callback = magma_NID_callback,
+};
+
GOST_cipher magma_cbc_cipher = {
.nid = NID_magma_cbc,
.template = &gost_template_cipher,
return magma_cipher_init(ctx, key, iv, enc);
}
+void gost_magma_encrypt_wrap(unsigned char *in, unsigned char *out,
+ struct ossl_gost_cipher_ctx *c) {
+ int i;
+ unsigned char b[8];
+ unsigned char d[8];
+ for (i = 0; i < 8; i++) {
+ b[7 - i] = in[i];
+ }
+ gostcrypt(&(c->cctx), b, d);
+ for (i = 0; i < 8; i++) {
+ out[7 - i] = d[i];
+ }
+}
+
+/* ----------------------------------------------------------------------------------------------- */
+/*! Функция реализует операцию умножения двух элементов конечного поля \f$ \mathbb F_{2^{64}}\f$,
+ порожденного неприводимым многочленом
+ \f$ f(x) = x^{64} + x^4 + x^3 + x + 1 \in \mathbb F_2[x]\f$. Для умножения используется
+ простейшая реализация, основанная на приведении по модулю после каждого шага алгоритма. */
+/* ----------------------------------------------------------------------------------------------- */
+static void gf64_mul (uint64_t *result, uint64_t *arg1, uint64_t *arg2)
+{
+ int i = 0;
+ register uint64_t t, X0;
+ uint64_t Z0 = 0;
+
+#ifdef L_ENDIAN
+ X0 = BSWAP64(*arg1);
+#else
+ X0 = *arg1;
+#endif
+
+#ifdef L_ENDIAN
+ t = BSWAP64(*(arg2));
+#else
+ t = *(arg2);
+#endif
+
+ for (i = 0; i < 63; i++) {
+ if (t & 0x1) {
+ Z0 ^= X0;
+ }
+ t >>= 1;
+ if (X0 & 0x8000000000000000) {
+ X0 <<= 1;
+ X0 ^= 0x1b;
+ }
+ else {
+ X0 <<= 1;
+ }
+ }
+
+ if (t & 0x1) {
+ Z0 ^= X0;
+ }
+
+#ifdef L_ENDIAN
+ *(result) = BSWAP64(Z0);
+#else
+ *(result) = Z0;
+#endif
+}
+
+static int gost_magma_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);
+ if (!gost_cipher_set_param(&mctx->ks.g_ks, NID_id_tc26_gost_28147_param_Z))
+ return 0;
+ magma_key(&(mctx->ks.g_ks.cctx), key);
+ gost_mgm128_init(&mctx->mgm, &mctx->ks,
+ (block128_f) gost_magma_encrypt_wrap, gf64_mul, 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;
+}
+
/*
* Wrapper around gostcrypt function from gost89.c which perform key meshing
* when nesseccary
return inl;
}
+
+static int gost_magma_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_MAGMA_CIPHER_DO_MGM,
+ GOST_R_BAD_ORDER);
+ return -1;
+ }
+
+ if (!mctx->iv_set) {
+ GOSTerr(GOST_F_GOST_MAGMA_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), 8);
+ mctx->taglen = 8;
+ /* Don't reuse the IV */
+ mctx->iv_set = 0;
+ return 0;
+ }
+
+}
+
/* GOST encryption in CFB mode */
static int gost_cipher_do_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
return 1;
}
+static int gost_magma_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_destroy(&mctx->ks.g_ks.cctx);
+ OPENSSL_cleanse(&mctx->mgm, sizeof(mctx->mgm));
+ EVP_CIPHER_CTX_set_app_data(c, NULL);
+ return 1;
+}
+
+static int gost_magma_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 != 8 || enc) {
+ GOSTerr(GOST_F_GOST_MAGMA_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 > 8 || !enc || mctx->taglen < 0) {
+ GOSTerr(GOST_F_GOST_MAGMA_MGM_CTRL,
+ GOST_R_INVALID_TAG_LENGTH);
+ return 0;
+ }
+ memcpy(ptr, buf, arg);
+ return 1;
+
+ default:
+ return -1;
+ }
+}
+
/* Control function for gost cipher */
static int gost_cipher_ctl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
{
case EVP_CTRL_RAND_KEY:
if (RAND_priv_bytes
((unsigned char *)ptr, EVP_CIPHER_CTX_key_length(ctx)) <= 0) {
- GOSTerr(GOST_F_GOST_CIPHER_CTL, GOST_R_RNG_ERROR);
+ GOSTerr(GOST_F_MAGMA_CIPHER_CTL, GOST_R_RNG_ERROR);
return -1;
}
break;
projects / openssl-gost / engine.git / blobdiff