Adding upstream version 3.7.9.upstream/3.7.9upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1383 insertions, 0 deletions

diff --git a/lib/nettle/cipher.c b/lib/nettle/cipher.c
new file mode 100644
index 0000000..c9c59fb
--- /dev/null
+++ b/lib/nettle/cipher.c
@@ -0,0 +1,1383 @@
+/*
+ * Copyright (C) 2010-2012 Free Software Foundation, Inc.
+ * Copyright (C) 2014 Red Hat, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GNUTLS.
+ *
+ * The GNUTLS library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>
+ *
+ */
+
+/* Here lie nettle's wrappers for cipher support.
+ */
+
+#include "gnutls_int.h"
+#include "errors.h"
+#include <cipher_int.h>
+#include <nettle/aes.h>
+#include <nettle/camellia.h>
+#include <nettle/arcfour.h>
+#include <nettle/arctwo.h>
+#include <nettle/salsa20.h>
+#include <nettle/des.h>
+#include <nettle/version.h>
+#if ENABLE_GOST
+#ifndef HAVE_NETTLE_GOST28147_SET_KEY
+#include "gost/gost28147.h"
+#else
+#include <nettle/gost28147.h>
+#endif
+#ifndef HAVE_NETTLE_MAGMA_SET_KEY
+#include "gost/magma.h"
+#else
+#include <nettle/magma.h>
+#endif
+#ifndef HAVE_NETTLE_KUZNYECHIK_SET_KEY
+#include "gost/kuznyechik.h"
+#else
+#include <nettle/kuznyechik.h>
+#endif
+#include "gost/acpkm.h"
+#include <nettle/ctr.h>
+#endif
+#include <nettle/nettle-meta.h>
+#include <nettle/cbc.h>
+#include <nettle/gcm.h>
+#include <nettle/ccm.h>
+#include <nettle/chacha.h>
+#include <nettle/chacha-poly1305.h>
+#include <nettle/cfb.h>
+#include <nettle/xts.h>
+#include <nettle/siv-cmac.h>
+#include <fips.h>
+#include <intprops.h>
+
+struct nettle_cipher_ctx;
+
+/* Functions that refer to the nettle library.
+ */
+typedef void (*encrypt_func) (struct nettle_cipher_ctx*,
+			      size_t length, 
+			      uint8_t * dst,
+			      const uint8_t * src);
+typedef void (*decrypt_func) (struct nettle_cipher_ctx*,
+			      size_t length, uint8_t *dst,
+			      const uint8_t *src);
+
+typedef void (*aead_encrypt_func) (struct nettle_cipher_ctx*,
+			      size_t nonce_size, const void *nonce,
+			      size_t auth_size, const void *auth,
+			      size_t tag_size,
+			      size_t length, uint8_t * dst,
+			      const uint8_t * src);
+typedef int (*aead_decrypt_func) (struct nettle_cipher_ctx*,
+			      size_t nonce_size, const void *nonce,
+			      size_t auth_size, const void *auth,
+			      size_t tag_size,
+			      size_t length, uint8_t * dst,
+			      const uint8_t * src);
+
+typedef void (*setiv_func) (void *ctx, size_t length, const uint8_t *);
+typedef void (*gen_setkey_func) (void *ctx, size_t length, const uint8_t *);
+
+struct nettle_cipher_st {
+	gnutls_cipher_algorithm_t algo;
+	unsigned ctx_size;
+	nettle_cipher_func *encrypt_block;
+	nettle_cipher_func *decrypt_block;
+	unsigned block_size;
+	unsigned key_size;
+	unsigned max_iv_size;
+
+	encrypt_func encrypt;
+	decrypt_func decrypt;
+	aead_encrypt_func aead_encrypt;
+	aead_decrypt_func aead_decrypt;
+	nettle_hash_update_func* auth;
+	nettle_hash_digest_func* tag;
+	nettle_set_key_func* set_encrypt_key;
+	nettle_set_key_func* set_decrypt_key;
+	gen_setkey_func gen_set_key; /* for arcfour which has variable key size */
+	setiv_func set_iv;
+};
+
+struct nettle_cipher_ctx {
+	const struct nettle_cipher_st *cipher;
+	void *ctx_ptr; /* always 16-aligned */
+	uint8_t iv[MAX_CIPHER_BLOCK_SIZE];
+	unsigned iv_size;
+
+	bool enc;
+	size_t rekey_counter;
+};
+
+#define AES_GCM_ENCRYPT_MAX_BYTES ((1ULL << 36) - 32)
+static inline int
+record_aes_gcm_encrypt_size(size_t *counter, size_t size) {
+	size_t sum;
+
+	if (!INT_ADD_OK(*counter, size, &sum) ||
+	    sum > AES_GCM_ENCRYPT_MAX_BYTES) {
+		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+	}
+	*counter = sum;
+
+	return 0;
+}
+
+static void
+_stream_encrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		const uint8_t * src)
+{
+	ctx->cipher->encrypt_block(ctx->ctx_ptr, length, dst, src);
+}
+
+static void
+_stream_decrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		const uint8_t * src)
+{
+	ctx->cipher->decrypt_block(ctx->ctx_ptr, length, dst, src);
+}
+
+static void
+_cbc_encrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		const uint8_t * src)
+{
+	cbc_encrypt(ctx->ctx_ptr, ctx->cipher->encrypt_block,
+		    ctx->iv_size, ctx->iv,
+		    length, dst, src);
+}
+
+static void
+_cbc_decrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		const uint8_t * src)
+{
+	cbc_decrypt(ctx->ctx_ptr, ctx->cipher->decrypt_block,
+		    ctx->iv_size, ctx->iv,
+		    length, dst, src);
+}
+
+#if ENABLE_GOST
+struct magma_acpkm_ctx {
+	uint8_t iv[MAGMA_BLOCK_SIZE];
+	struct acpkm_ctx ctx;
+	struct magma_ctx cipher;
+};
+
+struct kuznyechik_acpkm_ctx {
+	uint8_t iv[KUZNYECHIK_BLOCK_SIZE];
+	struct acpkm_ctx ctx;
+	struct kuznyechik_ctx cipher;
+};
+
+static void
+_cfb_encrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		const uint8_t * src)
+{
+	cfb_encrypt(ctx->ctx_ptr, ctx->cipher->encrypt_block,
+		    ctx->iv_size, ctx->iv,
+		    length, dst, src);
+}
+
+static void
+_cfb_decrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		const uint8_t * src)
+{
+	cfb_decrypt(ctx->ctx_ptr, ctx->cipher->encrypt_block,
+		    ctx->iv_size, ctx->iv,
+		    length, dst, src);
+}
+
+static void
+_ctr_acpkm_crypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+	   const uint8_t * src)
+{
+	/* Use context-specific IV which comes as a first field */
+	ctr_crypt(ctx->ctx_ptr, ctx->cipher->encrypt_block,
+		  ctx->cipher->block_size, ctx->ctx_ptr,
+		  length, dst, src);
+}
+
+static void
+_gost28147_set_key_tc26z(void *ctx, const uint8_t *key)
+{
+	gost28147_set_param(ctx, &gost28147_param_TC26_Z);
+	gost28147_set_key(ctx, key);
+}
+
+static void
+_gost28147_set_key_cpa(void *ctx, const uint8_t *key)
+{
+	gost28147_set_param(ctx, &gost28147_param_CryptoPro_A);
+	gost28147_set_key(ctx, key);
+}
+
+static void
+_gost28147_set_key_cpb(void *ctx, const uint8_t *key)
+{
+	gost28147_set_param(ctx, &gost28147_param_CryptoPro_B);
+	gost28147_set_key(ctx, key);
+}
+
+static void
+_gost28147_set_key_cpc(void *ctx, const uint8_t *key)
+{
+	gost28147_set_param(ctx, &gost28147_param_CryptoPro_C);
+	gost28147_set_key(ctx, key);
+}
+
+static void
+_gost28147_set_key_cpd(void *ctx, const uint8_t *key)
+{
+	gost28147_set_param(ctx, &gost28147_param_CryptoPro_D);
+	gost28147_set_key(ctx, key);
+}
+
+static void
+_gost28147_cnt_set_key_tc26z(void *ctx, const uint8_t *key)
+{
+	gost28147_cnt_init(ctx, key, &gost28147_param_TC26_Z);
+}
+
+static void
+_gost28147_cnt_set_nonce (void *ctx, size_t length, const uint8_t *nonce)
+{
+	gost28147_cnt_set_iv (ctx, nonce);
+}
+
+static void
+_gost28147_cnt_crypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		     const uint8_t * src)
+{
+	gost28147_cnt_crypt((void *)ctx->ctx_ptr, length, dst, src);
+}
+
+static void
+_magma_acpkm_crypt(struct magma_acpkm_ctx *ctx,
+		  size_t length, uint8_t *dst,
+		  const uint8_t *src)
+{
+  acpkm_crypt(&ctx->ctx, &ctx->cipher,
+	      (nettle_cipher_func *)magma_encrypt,
+	      (nettle_set_key_func *)magma_set_key,
+	      length, dst, src);
+}
+
+static void
+_kuznyechik_acpkm_crypt(struct kuznyechik_acpkm_ctx *ctx,
+		       size_t length, uint8_t *dst,
+		       const uint8_t *src)
+{
+  acpkm_crypt(&ctx->ctx, &ctx->cipher,
+	      (nettle_cipher_func *)kuznyechik_encrypt,
+	      (nettle_set_key_func *)kuznyechik_set_key,
+	      length, dst, src);
+}
+
+static void
+_magma_ctr_acpkm_set_key(struct magma_acpkm_ctx *ctx, const uint8_t *key)
+{
+	magma_set_key(&ctx->cipher, key);
+	ctx->ctx.pos = 0;
+	ctx->ctx.N = 1024;
+}
+
+static void
+_magma_ctr_acpkm_set_iv(struct magma_acpkm_ctx *ctx, size_t length, const uint8_t *iv)
+{
+	memcpy(ctx->iv, iv, length);
+	memset(ctx->iv + length, 0, MAGMA_BLOCK_SIZE - length);
+}
+
+static void
+_kuznyechik_ctr_acpkm_set_key(struct kuznyechik_acpkm_ctx *ctx, const uint8_t *key)
+{
+	kuznyechik_set_key(&ctx->cipher, key);
+	ctx->ctx.pos = 0;
+	ctx->ctx.N = 4096;
+}
+
+static void
+_kuznyechik_ctr_acpkm_set_iv(struct kuznyechik_acpkm_ctx *ctx, size_t length, const uint8_t *iv)
+{
+	memcpy(ctx->iv, iv, length);
+	memset(ctx->iv + length, 0, KUZNYECHIK_BLOCK_SIZE - length);
+}
+#endif
+
+static void
+_ccm_encrypt(struct nettle_cipher_ctx *ctx,
+	      size_t nonce_size, const void *nonce,
+	      size_t auth_size, const void *auth,
+	      size_t tag_size,
+	      size_t length, uint8_t * dst,
+	      const uint8_t * src)
+{
+	ccm_encrypt_message((void*)ctx->ctx_ptr, ctx->cipher->encrypt_block,
+			    nonce_size, nonce,
+			    auth_size, auth,
+			    tag_size, length, dst, src);
+}
+
+static int
+_ccm_decrypt(struct nettle_cipher_ctx *ctx,
+	      size_t nonce_size, const void *nonce,
+	      size_t auth_size, const void *auth,
+	      size_t tag_size,
+	      size_t length, uint8_t * dst,
+	      const uint8_t * src)
+{
+	return ccm_decrypt_message((void*)ctx->ctx_ptr, ctx->cipher->encrypt_block,
+				    nonce_size, nonce,
+				    auth_size, auth,
+				    tag_size, length, dst, src);
+}
+
+static void
+_siv_cmac_aes128_encrypt_message(struct nettle_cipher_ctx *ctx,
+				 size_t nonce_size, const void *nonce,
+				 size_t auth_size, const void *auth,
+				 size_t tag_size,
+				 size_t length, uint8_t * dst,
+				 const uint8_t * src)
+{
+	siv_cmac_aes128_encrypt_message((void*)ctx->ctx_ptr,
+					nonce_size, nonce,
+					auth_size, auth,
+					length, dst, src);
+}
+
+static int
+_siv_cmac_aes128_decrypt_message(struct nettle_cipher_ctx *ctx,
+				 size_t nonce_size, const void *nonce,
+				 size_t auth_size, const void *auth,
+				 size_t tag_size,
+				 size_t length, uint8_t * dst,
+				 const uint8_t * src)
+{
+	return siv_cmac_aes128_decrypt_message((void*)ctx->ctx_ptr,
+					       nonce_size, nonce,
+					       auth_size, auth,
+					       length, dst, src);
+}
+
+static void
+_siv_cmac_aes256_encrypt_message(struct nettle_cipher_ctx *ctx,
+				 size_t nonce_size, const void *nonce,
+				 size_t auth_size, const void *auth,
+				 size_t tag_size,
+				 size_t length, uint8_t * dst,
+				 const uint8_t * src)
+{
+	siv_cmac_aes256_encrypt_message((void*)ctx->ctx_ptr,
+					nonce_size, nonce,
+					auth_size, auth,
+					length, dst, src);
+}
+
+static int
+_siv_cmac_aes256_decrypt_message(struct nettle_cipher_ctx *ctx,
+				 size_t nonce_size, const void *nonce,
+				 size_t auth_size, const void *auth,
+				 size_t tag_size,
+				 size_t length, uint8_t * dst,
+				 const uint8_t * src)
+{
+	return siv_cmac_aes256_decrypt_message((void*)ctx->ctx_ptr,
+					       nonce_size, nonce,
+					       auth_size, auth,
+					       length, dst, src);
+}
+
+static void
+_chacha_set_nonce(struct chacha_ctx *ctx,
+		  size_t length, const uint8_t *nonce)
+{
+	chacha_set_nonce(ctx, nonce + CHACHA_COUNTER_SIZE);
+	chacha_set_counter(ctx, nonce);
+}
+
+static void
+_chacha_set_nonce96(struct chacha_ctx *ctx,
+		    size_t length, const uint8_t *nonce)
+{
+	chacha_set_nonce96(ctx, nonce + CHACHA_COUNTER32_SIZE);
+	chacha_set_counter32(ctx, nonce);
+}
+
+static void
+_chacha_poly1305_set_nonce (struct chacha_poly1305_ctx *ctx,
+		   size_t length, const uint8_t *nonce)
+{
+	chacha_poly1305_set_nonce(ctx, nonce);
+}
+		   
+struct gcm_cast_st { struct gcm_key key; struct gcm_ctx gcm; unsigned long xx[1]; };
+#define GCM_CTX_GET_KEY(ptr) (&((struct gcm_cast_st*)ptr)->key)
+#define GCM_CTX_GET_CTX(ptr) (&((struct gcm_cast_st*)ptr)->gcm)
+#define GCM_CTX_GET_CIPHER(ptr) ((void*)&((struct gcm_cast_st*)ptr)->xx)
+
+static void
+_gcm_encrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		 const uint8_t * src)
+{
+	gcm_encrypt(GCM_CTX_GET_CTX(ctx->ctx_ptr), GCM_CTX_GET_KEY(ctx->ctx_ptr),
+		    GCM_CTX_GET_CIPHER(ctx->ctx_ptr), ctx->cipher->encrypt_block,
+		    length, dst, src);
+}
+
+static void
+_gcm_decrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		 const uint8_t * src)
+{
+	gcm_decrypt(GCM_CTX_GET_CTX(ctx->ctx_ptr), GCM_CTX_GET_KEY(ctx->ctx_ptr),
+		    GCM_CTX_GET_CIPHER(ctx->ctx_ptr), ctx->cipher->encrypt_block,
+		    length, dst, src);
+}
+
+static void _des_set_key(struct des_ctx *ctx, const uint8_t *key)
+{
+	des_set_key(ctx, key);
+}
+
+static void _des3_set_key(struct des3_ctx *ctx, const uint8_t *key)
+{
+	des3_set_key(ctx, key);
+}
+
+static void
+_cfb8_encrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+	      const uint8_t * src)
+{
+	cfb8_encrypt(ctx->ctx_ptr, ctx->cipher->encrypt_block,
+		     ctx->iv_size, ctx->iv,
+		     length, dst, src);
+}
+
+static void
+_cfb8_decrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+	      const uint8_t * src)
+{
+	cfb8_decrypt(ctx->ctx_ptr, ctx->cipher->encrypt_block,
+		     ctx->iv_size, ctx->iv,
+		     length, dst, src);
+}
+
+static void
+_xts_aes128_set_encrypt_key(struct xts_aes128_key *xts_key,
+			    const uint8_t *key)
+{
+	if (_gnutls_fips_mode_enabled() &&
+	    gnutls_memcmp(key, key + AES128_KEY_SIZE, AES128_KEY_SIZE) == 0)
+		_gnutls_switch_lib_state(LIB_STATE_ERROR);
+
+	xts_aes128_set_encrypt_key(xts_key, key);
+}
+
+static void
+_xts_aes128_set_decrypt_key(struct xts_aes128_key *xts_key,
+			    const uint8_t *key)
+{
+	if (_gnutls_fips_mode_enabled() &&
+	    gnutls_memcmp(key, key + AES128_KEY_SIZE, AES128_KEY_SIZE) == 0)
+		_gnutls_switch_lib_state(LIB_STATE_ERROR);
+
+	xts_aes128_set_decrypt_key(xts_key, key);
+}
+
+static void
+_xts_aes256_set_encrypt_key(struct xts_aes256_key *xts_key,
+			    const uint8_t *key)
+{
+	if (_gnutls_fips_mode_enabled() &&
+	    gnutls_memcmp(key, key + AES256_KEY_SIZE, AES256_KEY_SIZE) == 0)
+		_gnutls_switch_lib_state(LIB_STATE_ERROR);
+
+	xts_aes256_set_encrypt_key(xts_key, key);
+}
+
+static void
+_xts_aes256_set_decrypt_key(struct xts_aes256_key *xts_key,
+			    const uint8_t *key)
+{
+	if (_gnutls_fips_mode_enabled() &&
+	    gnutls_memcmp(key, key + AES256_KEY_SIZE, AES256_KEY_SIZE) == 0)
+		_gnutls_switch_lib_state(LIB_STATE_ERROR);
+
+	xts_aes256_set_decrypt_key(xts_key, key);
+}
+
+static void
+_xts_aes128_encrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		    const uint8_t * src)
+{
+	xts_aes128_encrypt_message(ctx->ctx_ptr, ctx->iv, length, dst, src);
+}
+
+static void
+_xts_aes128_decrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		    const uint8_t * src)
+{
+	xts_aes128_decrypt_message(ctx->ctx_ptr, ctx->iv, length, dst, src);
+}
+
+static void
+_xts_aes256_encrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		    const uint8_t * src)
+{
+	xts_aes256_encrypt_message(ctx->ctx_ptr, ctx->iv, length, dst, src);
+}
+
+static void
+_xts_aes256_decrypt(struct nettle_cipher_ctx *ctx, size_t length, uint8_t * dst,
+		    const uint8_t * src)
+{
+	xts_aes256_decrypt_message(ctx->ctx_ptr, ctx->iv, length, dst, src);
+}
+
+static const struct nettle_cipher_st builtin_ciphers[] = {
+	{  .algo = GNUTLS_CIPHER_AES_128_GCM,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES128_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes128_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes128_decrypt,
+
+	   .ctx_size = sizeof(struct gcm_aes128_ctx),
+	   .encrypt = _gcm_encrypt,
+	   .decrypt = _gcm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)gcm_aes128_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)gcm_aes128_set_key,
+
+	   .tag = (nettle_hash_digest_func*)gcm_aes128_digest,
+	   .auth = (nettle_hash_update_func*)gcm_aes128_update,
+	   .set_iv = (setiv_func)gcm_aes128_set_iv,
+	   .max_iv_size = GCM_IV_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_192_GCM,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES192_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes192_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes192_decrypt,
+
+	   .ctx_size = sizeof(struct gcm_aes192_ctx),
+	   .encrypt = _gcm_encrypt,
+	   .decrypt = _gcm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)gcm_aes192_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)gcm_aes192_set_key,
+
+	   .tag = (nettle_hash_digest_func*)gcm_aes192_digest,
+	   .auth = (nettle_hash_update_func*)gcm_aes192_update,
+	   .set_iv = (setiv_func)gcm_aes192_set_iv,
+	   .max_iv_size = GCM_IV_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_256_GCM,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes256_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes256_decrypt,
+
+	   .ctx_size = sizeof(struct gcm_aes256_ctx),
+	   .encrypt = _gcm_encrypt,
+	   .decrypt = _gcm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)gcm_aes256_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)gcm_aes256_set_key,
+	   
+	   .tag = (nettle_hash_digest_func*)gcm_aes256_digest,
+	   .auth = (nettle_hash_update_func*)gcm_aes256_update,
+	   .set_iv = (setiv_func)gcm_aes256_set_iv,
+	   .max_iv_size = GCM_IV_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_128_CCM,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES128_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes128_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes128_decrypt,
+
+	   .ctx_size = sizeof(struct aes128_ctx),
+	   .aead_encrypt = _ccm_encrypt,
+	   .aead_decrypt = _ccm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes128_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes128_set_encrypt_key,
+	   .max_iv_size = CCM_MAX_NONCE_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_128_CCM_8,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES128_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes128_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes128_decrypt,
+
+	   .ctx_size = sizeof(struct aes128_ctx),
+	   .aead_encrypt = _ccm_encrypt,
+	   .aead_decrypt = _ccm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes128_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes128_set_encrypt_key,
+	   .max_iv_size = CCM_MAX_NONCE_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_256_CCM,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes256_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes256_decrypt,
+
+	   .ctx_size = sizeof(struct aes256_ctx),
+	   .aead_encrypt = _ccm_encrypt,
+	   .aead_decrypt = _ccm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes256_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes256_set_encrypt_key,
+	   .max_iv_size = CCM_MAX_NONCE_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_256_CCM_8,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes256_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes256_decrypt,
+
+	   .ctx_size = sizeof(struct aes256_ctx),
+	   .aead_encrypt = _ccm_encrypt,
+	   .aead_decrypt = _ccm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes256_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes256_set_encrypt_key,
+	   .max_iv_size = CCM_MAX_NONCE_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_CAMELLIA_128_GCM,
+	   .block_size = CAMELLIA_BLOCK_SIZE,
+	   .key_size = CAMELLIA128_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)camellia128_crypt,
+	   .decrypt_block = (nettle_cipher_func*)camellia128_crypt,
+
+	   .ctx_size = sizeof(struct gcm_camellia128_ctx),
+	   .encrypt = _gcm_encrypt,
+	   .decrypt = _gcm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)gcm_camellia128_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)gcm_camellia128_set_key,
+	   .tag = (nettle_hash_digest_func*)gcm_camellia128_digest,
+	   .auth = (nettle_hash_update_func*)gcm_camellia128_update,
+	   .max_iv_size = GCM_IV_SIZE,
+	   .set_iv = (setiv_func)gcm_camellia128_set_iv
+	},
+	{  .algo = GNUTLS_CIPHER_CAMELLIA_256_GCM,
+	   .block_size = CAMELLIA_BLOCK_SIZE,
+	   .key_size = CAMELLIA256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)camellia256_crypt,
+	   .decrypt_block = (nettle_cipher_func*)camellia256_crypt,
+
+	   .ctx_size = sizeof(struct gcm_camellia256_ctx),
+	   .encrypt = _gcm_encrypt,
+	   .decrypt = _gcm_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)gcm_camellia256_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)gcm_camellia256_set_key,
+	   .tag = (nettle_hash_digest_func*)gcm_camellia256_digest,
+	   .auth = (nettle_hash_update_func*)gcm_camellia256_update,
+	   .max_iv_size = GCM_IV_SIZE,
+	   .set_iv = (setiv_func)gcm_camellia256_set_iv
+	},
+	{  .algo = GNUTLS_CIPHER_AES_128_CBC,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES128_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes128_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes128_decrypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct aes128_ctx, AES_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes128_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes128_set_decrypt_key,
+	   .max_iv_size = AES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_192_CBC,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES192_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes192_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes192_decrypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct aes192_ctx, AES_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes192_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes192_set_decrypt_key,
+	   .max_iv_size = AES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_256_CBC,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes256_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes256_decrypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct aes256_ctx, AES_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes256_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes256_set_decrypt_key,
+	   .max_iv_size = AES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_CAMELLIA_128_CBC,
+	   .block_size = CAMELLIA_BLOCK_SIZE,
+	   .key_size = CAMELLIA128_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)camellia128_crypt,
+	   .decrypt_block = (nettle_cipher_func*)camellia128_crypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct camellia128_ctx, CAMELLIA_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)camellia128_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)camellia128_set_decrypt_key,
+	   .max_iv_size = CAMELLIA_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_CAMELLIA_192_CBC,
+	   .block_size = CAMELLIA_BLOCK_SIZE,
+	   .key_size = CAMELLIA192_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)camellia192_crypt,
+	   .decrypt_block = (nettle_cipher_func*)camellia192_crypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct camellia192_ctx, CAMELLIA_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)camellia192_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)camellia192_set_decrypt_key,
+	   .max_iv_size = CAMELLIA_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_CAMELLIA_256_CBC,
+	   .block_size = CAMELLIA_BLOCK_SIZE,
+	   .key_size = CAMELLIA256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)camellia256_crypt,
+	   .decrypt_block = (nettle_cipher_func*)camellia256_crypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct camellia256_ctx, CAMELLIA_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)camellia256_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)camellia256_set_decrypt_key,
+	   .max_iv_size = CAMELLIA_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_RC2_40_CBC,
+	   .block_size = ARCTWO_BLOCK_SIZE,
+	   .key_size = 5,
+	   .encrypt_block = (nettle_cipher_func*)arctwo_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)arctwo_decrypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct arctwo_ctx, ARCTWO_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)arctwo40_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)arctwo40_set_key,
+	   .max_iv_size = ARCTWO_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_DES_CBC,
+	   .block_size = DES_BLOCK_SIZE,
+	   .key_size = DES_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)des_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)des_decrypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct des_ctx, DES_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)_des_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)_des_set_key,
+	   .max_iv_size = DES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_3DES_CBC,
+	   .block_size = DES3_BLOCK_SIZE,
+	   .key_size = DES3_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)des3_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)des3_decrypt,
+
+	   .ctx_size = sizeof(struct CBC_CTX(struct des3_ctx, DES3_BLOCK_SIZE)),
+	   .encrypt = _cbc_encrypt,
+	   .decrypt = _cbc_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)_des3_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)_des3_set_key,
+	   .max_iv_size = DES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_ARCFOUR_128,
+	   .block_size = 1,
+	   .key_size = 0,
+	   .encrypt_block = (nettle_cipher_func*)arcfour_crypt,
+	   .decrypt_block = (nettle_cipher_func*)arcfour_crypt,
+
+	   .ctx_size = sizeof(struct arcfour_ctx),
+	   .encrypt = _stream_encrypt,
+	   .decrypt = _stream_encrypt,
+	   .gen_set_key = (gen_setkey_func)arcfour_set_key,
+	   .set_encrypt_key = (nettle_set_key_func*)arcfour128_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)arcfour128_set_key,
+	},
+	{  .algo = GNUTLS_CIPHER_SALSA20_256,
+	   .block_size = 1,
+	   .key_size = SALSA20_256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)salsa20_crypt,
+	   .decrypt_block = (nettle_cipher_func*)salsa20_crypt,
+
+	   .ctx_size = sizeof(struct salsa20_ctx),
+	   .encrypt = _stream_encrypt,
+	   .decrypt = _stream_encrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)salsa20_256_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)salsa20_256_set_key,
+	   .max_iv_size = SALSA20_NONCE_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_ESTREAM_SALSA20_256,
+	   .block_size = 1,
+	   .key_size = SALSA20_256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)salsa20r12_crypt,
+	   .decrypt_block = (nettle_cipher_func*)salsa20r12_crypt,
+
+	   .ctx_size = sizeof(struct salsa20_ctx),
+	   .encrypt = _stream_encrypt,
+	   .decrypt = _stream_encrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)salsa20_256_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)salsa20_256_set_key,
+	   .max_iv_size = SALSA20_NONCE_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_CHACHA20_32,
+	   .block_size = 1,
+	   .key_size = CHACHA_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)chacha_crypt32,
+	   .decrypt_block = (nettle_cipher_func*)chacha_crypt32,
+
+	   .ctx_size = sizeof(struct chacha_ctx),
+	   .encrypt = _stream_encrypt,
+	   .decrypt = _stream_encrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)chacha_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)chacha_set_key,
+	   .set_iv = (setiv_func)_chacha_set_nonce96,
+	   /* we allow setting the initial block counter as part of nonce */
+	   .max_iv_size = CHACHA_NONCE96_SIZE + CHACHA_COUNTER32_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_CHACHA20_64,
+	   .block_size = 1,
+	   .key_size = CHACHA_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)chacha_crypt,
+	   .decrypt_block = (nettle_cipher_func*)chacha_crypt,
+
+	   .ctx_size = sizeof(struct chacha_ctx),
+	   .encrypt = _stream_encrypt,
+	   .decrypt = _stream_encrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)chacha_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)chacha_set_key,
+	   .set_iv = (setiv_func)_chacha_set_nonce,
+	   /* we allow setting the initial block counter as part of nonce */
+	   .max_iv_size = CHACHA_NONCE_SIZE + CHACHA_COUNTER_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_CHACHA20_POLY1305,
+	   .block_size = CHACHA_POLY1305_BLOCK_SIZE,
+	   .key_size = CHACHA_POLY1305_KEY_SIZE,
+
+	   .ctx_size = sizeof(struct chacha_poly1305_ctx),
+	   .encrypt_block = (nettle_cipher_func*)chacha_poly1305_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)chacha_poly1305_decrypt,
+	   .encrypt = _stream_encrypt,
+	   .decrypt = _stream_decrypt,
+	   .auth = (nettle_hash_update_func*)chacha_poly1305_update,
+	   .tag = (nettle_hash_digest_func*)chacha_poly1305_digest,
+	   .set_encrypt_key = (nettle_set_key_func*)chacha_poly1305_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)chacha_poly1305_set_key,
+	   .set_iv = (setiv_func)_chacha_poly1305_set_nonce,
+	   .max_iv_size = CHACHA_POLY1305_NONCE_SIZE,
+	},
+#if ENABLE_GOST
+	{
+	   .algo = GNUTLS_CIPHER_GOST28147_TC26Z_CFB,
+	   .block_size = GOST28147_BLOCK_SIZE,
+	   .key_size = GOST28147_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+	   .decrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+
+	   .ctx_size = sizeof(struct CFB_CTX(struct gost28147_ctx, GOST28147_BLOCK_SIZE)),
+	   .encrypt = _cfb_encrypt,
+	   .decrypt = _cfb_decrypt,
+	   .set_encrypt_key = _gost28147_set_key_tc26z,
+	   .set_decrypt_key = _gost28147_set_key_tc26z,
+	},
+	{
+	   .algo = GNUTLS_CIPHER_GOST28147_CPA_CFB,
+	   .block_size = GOST28147_BLOCK_SIZE,
+	   .key_size = GOST28147_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+	   .decrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+
+	   .ctx_size = sizeof(struct CFB_CTX(struct gost28147_ctx, GOST28147_BLOCK_SIZE)),
+	   .encrypt = _cfb_encrypt,
+	   .decrypt = _cfb_decrypt,
+	   .set_encrypt_key = _gost28147_set_key_cpa,
+	   .set_decrypt_key = _gost28147_set_key_cpa,
+	},
+	{
+	   .algo = GNUTLS_CIPHER_GOST28147_CPB_CFB,
+	   .block_size = GOST28147_BLOCK_SIZE,
+	   .key_size = GOST28147_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+	   .decrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+
+	   .ctx_size = sizeof(struct CFB_CTX(struct gost28147_ctx, GOST28147_BLOCK_SIZE)),
+	   .encrypt = _cfb_encrypt,
+	   .decrypt = _cfb_decrypt,
+	   .set_encrypt_key = _gost28147_set_key_cpb,
+	   .set_decrypt_key = _gost28147_set_key_cpb,
+	},
+	{
+	   .algo = GNUTLS_CIPHER_GOST28147_CPC_CFB,
+	   .block_size = GOST28147_BLOCK_SIZE,
+	   .key_size = GOST28147_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+	   .decrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+
+	   .ctx_size = sizeof(struct CFB_CTX(struct gost28147_ctx, GOST28147_BLOCK_SIZE)),
+	   .encrypt = _cfb_encrypt,
+	   .decrypt = _cfb_decrypt,
+	   .set_encrypt_key = _gost28147_set_key_cpc,
+	   .set_decrypt_key = _gost28147_set_key_cpc,
+	},
+	{
+	   .algo = GNUTLS_CIPHER_GOST28147_CPD_CFB,
+	   .block_size = GOST28147_BLOCK_SIZE,
+	   .key_size = GOST28147_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+	   .decrypt_block = (nettle_cipher_func*)gost28147_encrypt_for_cfb,
+
+	   .ctx_size = sizeof(struct CFB_CTX(struct gost28147_ctx, GOST28147_BLOCK_SIZE)),
+	   .encrypt = _cfb_encrypt,
+	   .decrypt = _cfb_decrypt,
+	   .set_encrypt_key = _gost28147_set_key_cpd,
+	   .set_decrypt_key = _gost28147_set_key_cpd,
+	},
+	{
+	   .algo = GNUTLS_CIPHER_GOST28147_TC26Z_CNT,
+	   .block_size = GOST28147_BLOCK_SIZE,
+	   .key_size = GOST28147_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)gost28147_encrypt, /* unused */
+	   .decrypt_block = (nettle_cipher_func*)gost28147_decrypt, /* unused */
+
+	   .ctx_size = sizeof(struct gost28147_cnt_ctx),
+	   .encrypt = _gost28147_cnt_crypt,
+	   .decrypt = _gost28147_cnt_crypt,
+	   .set_encrypt_key = _gost28147_cnt_set_key_tc26z,
+	   .set_decrypt_key = _gost28147_cnt_set_key_tc26z,
+	   .set_iv = (setiv_func)_gost28147_cnt_set_nonce,
+	},
+	{
+	   .algo = GNUTLS_CIPHER_MAGMA_CTR_ACPKM,
+	   .block_size = MAGMA_BLOCK_SIZE,
+	   .key_size = MAGMA_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)_magma_acpkm_crypt,
+	   .decrypt_block = (nettle_cipher_func*)_magma_acpkm_crypt,
+
+	   .ctx_size = sizeof(struct magma_acpkm_ctx),
+	   .encrypt = _ctr_acpkm_crypt,
+	   .decrypt = _ctr_acpkm_crypt,
+	   .set_encrypt_key = (nettle_set_key_func*)_magma_ctr_acpkm_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)_magma_ctr_acpkm_set_key,
+	   .set_iv = (setiv_func)_magma_ctr_acpkm_set_iv,
+	},
+	{
+	   .algo = GNUTLS_CIPHER_KUZNYECHIK_CTR_ACPKM,
+	   .block_size = KUZNYECHIK_BLOCK_SIZE,
+	   .key_size = KUZNYECHIK_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)_kuznyechik_acpkm_crypt,
+	   .decrypt_block = (nettle_cipher_func*)_kuznyechik_acpkm_crypt,
+
+	   .ctx_size = sizeof(struct kuznyechik_acpkm_ctx),
+	   .encrypt = _ctr_acpkm_crypt,
+	   .decrypt = _ctr_acpkm_crypt,
+	   .set_encrypt_key = (nettle_set_key_func*)_kuznyechik_ctr_acpkm_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)_kuznyechik_ctr_acpkm_set_key,
+	   .set_iv = (setiv_func)_kuznyechik_ctr_acpkm_set_iv,
+	},
+#endif
+	{  .algo = GNUTLS_CIPHER_AES_128_CFB8,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES128_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes128_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes128_encrypt,
+
+	   .ctx_size = sizeof(struct CFB8_CTX(struct aes128_ctx, AES_BLOCK_SIZE)),
+	   .encrypt = _cfb8_encrypt,
+	   .decrypt = _cfb8_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes128_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes128_set_encrypt_key,
+	   .max_iv_size = AES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_192_CFB8,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES192_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes192_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes192_encrypt,
+
+	   .ctx_size = sizeof(struct CFB8_CTX(struct aes192_ctx, AES_BLOCK_SIZE)),
+	   .encrypt = _cfb8_encrypt,
+	   .decrypt = _cfb8_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes192_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes192_set_encrypt_key,
+	   .max_iv_size = AES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_256_CFB8,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES256_KEY_SIZE,
+	   .encrypt_block = (nettle_cipher_func*)aes256_encrypt,
+	   .decrypt_block = (nettle_cipher_func*)aes256_encrypt,
+
+	   .ctx_size = sizeof(struct CFB8_CTX(struct aes256_ctx, AES_BLOCK_SIZE)),
+	   .encrypt = _cfb8_encrypt,
+	   .decrypt = _cfb8_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)aes256_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)aes256_set_encrypt_key,
+	   .max_iv_size = AES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_128_XTS,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES128_KEY_SIZE * 2,
+
+	   .ctx_size = sizeof(struct xts_aes128_key),
+	   .encrypt = _xts_aes128_encrypt,
+	   .decrypt = _xts_aes128_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)_xts_aes128_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)_xts_aes128_set_decrypt_key,
+	   .max_iv_size = AES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_256_XTS,
+	   .block_size = AES_BLOCK_SIZE,
+	   .key_size = AES256_KEY_SIZE * 2,
+
+	   .ctx_size = sizeof(struct xts_aes256_key),
+	   .encrypt = _xts_aes256_encrypt,
+	   .decrypt = _xts_aes256_decrypt,
+	   .set_encrypt_key = (nettle_set_key_func*)_xts_aes256_set_encrypt_key,
+	   .set_decrypt_key = (nettle_set_key_func*)_xts_aes256_set_decrypt_key,
+	   .max_iv_size = AES_BLOCK_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_128_SIV,
+	   .block_size = SIV_BLOCK_SIZE,
+	   .key_size = SIV_CMAC_AES128_KEY_SIZE,
+
+	   .ctx_size = sizeof(struct siv_cmac_aes128_ctx),
+	   .aead_encrypt = (aead_encrypt_func)_siv_cmac_aes128_encrypt_message,
+	   .aead_decrypt = (aead_decrypt_func)_siv_cmac_aes128_decrypt_message,
+	   .set_encrypt_key = (nettle_set_key_func*)siv_cmac_aes128_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)siv_cmac_aes128_set_key,
+	   .max_iv_size = SIV_DIGEST_SIZE,
+	},
+	{  .algo = GNUTLS_CIPHER_AES_256_SIV,
+	   .block_size = SIV_BLOCK_SIZE,
+	   .key_size = SIV_CMAC_AES256_KEY_SIZE,
+
+	   .ctx_size = sizeof(struct siv_cmac_aes256_ctx),
+	   .aead_encrypt = (aead_encrypt_func)_siv_cmac_aes256_encrypt_message,
+	   .aead_decrypt = (aead_decrypt_func)_siv_cmac_aes256_decrypt_message,
+	   .set_encrypt_key = (nettle_set_key_func*)siv_cmac_aes256_set_key,
+	   .set_decrypt_key = (nettle_set_key_func*)siv_cmac_aes256_set_key,
+	   .max_iv_size = SIV_DIGEST_SIZE,
+	},
+};
+
+static int wrap_nettle_cipher_exists(gnutls_cipher_algorithm_t algo)
+{
+	unsigned i;
+	for (i=0;i<sizeof(builtin_ciphers)/sizeof(builtin_ciphers[0]);i++) {
+		if (algo == builtin_ciphers[i].algo) {
+			return 1;
+		}
+	}
+	return 0;
+}
+
+static int
+wrap_nettle_cipher_init(gnutls_cipher_algorithm_t algo, void **_ctx,
+			int enc)
+{
+	struct nettle_cipher_ctx *ctx;
+	uintptr_t cur_alignment;
+	int idx = -1;
+	unsigned i;
+	uint8_t *ctx_ptr;
+
+	for (i=0;i<sizeof(builtin_ciphers)/sizeof(builtin_ciphers[0]);i++) {
+		if (algo == builtin_ciphers[i].algo) {
+			idx = i;
+			break;
+		}
+	}
+
+	if (idx == -1)
+		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+
+	ctx = gnutls_calloc(1, sizeof(*ctx)+builtin_ciphers[idx].ctx_size+16);
+	if (ctx == NULL) {
+		gnutls_assert();
+		return GNUTLS_E_MEMORY_ERROR;
+	}
+
+	ctx->enc = enc;
+	ctx_ptr = ((uint8_t*)ctx) + sizeof(*ctx);
+
+	cur_alignment = ((uintptr_t)ctx_ptr) % 16;
+	if (cur_alignment > 0)
+		ctx_ptr += 16 - cur_alignment;
+
+	ctx->ctx_ptr = ctx_ptr;
+	ctx->cipher = &builtin_ciphers[idx];
+
+	*_ctx = ctx;
+
+	return 0;
+}
+
+static int
+wrap_nettle_cipher_setkey(void *_ctx, const void *key, size_t keysize)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+
+	if (ctx->cipher->key_size > 0 && unlikely(keysize != ctx->cipher->key_size)) {
+		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+	} else if (ctx->cipher->key_size == 0) {
+		ctx->cipher->gen_set_key(ctx->ctx_ptr, keysize, key);
+		return 0;
+	}
+
+	if (ctx->enc)
+		ctx->cipher->set_encrypt_key(ctx->ctx_ptr, key);
+	else
+		ctx->cipher->set_decrypt_key(ctx->ctx_ptr, key);
+
+	switch (ctx->cipher->algo) {
+	case GNUTLS_CIPHER_AES_128_GCM:
+	case GNUTLS_CIPHER_AES_192_GCM:
+	case GNUTLS_CIPHER_AES_256_GCM:
+		ctx->rekey_counter = 0;
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int
+wrap_nettle_cipher_setiv(void *_ctx, const void *iv, size_t iv_size)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+	unsigned max_iv;
+
+	switch (ctx->cipher->algo) {
+	case GNUTLS_CIPHER_AES_128_GCM:
+	case GNUTLS_CIPHER_AES_192_GCM:
+	case GNUTLS_CIPHER_AES_256_GCM:
+		FIPS_RULE(iv_size < GCM_IV_SIZE, GNUTLS_E_INVALID_REQUEST, "access to short GCM nonce size\n");
+		ctx->rekey_counter = 0;
+		break;
+	case GNUTLS_CIPHER_SALSA20_256:
+	case GNUTLS_CIPHER_ESTREAM_SALSA20_256:
+		if (iv_size != SALSA20_IV_SIZE)
+			return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+		break;
+	default:
+		break;
+	}
+
+	max_iv = ctx->cipher->max_iv_size;
+	if (max_iv == 0)
+		max_iv = MAX_CIPHER_BLOCK_SIZE;
+
+	if (iv_size > max_iv)
+		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+
+	if (ctx->cipher->set_iv) {
+		ctx->cipher->set_iv(ctx->ctx_ptr, iv_size, iv);
+	} else {
+		if (iv)
+			memcpy(ctx->iv, iv, iv_size);
+		ctx->iv_size = iv_size;
+	}
+
+	return 0;
+}
+
+static int
+wrap_nettle_cipher_getiv(void *_ctx, void *iv, size_t iv_size)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+
+	if (iv_size < ctx->iv_size)
+		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+
+	memcpy(iv, ctx->iv, ctx->iv_size);
+
+	return (int) ctx->iv_size;
+}
+
+static int
+wrap_nettle_cipher_decrypt(void *_ctx, const void *encr, size_t encr_size,
+			   void *plain, size_t plain_size)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+
+	if (unlikely(ctx->cipher->decrypt == NULL))
+		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+
+	ctx->cipher->decrypt(ctx, encr_size, plain, encr);
+
+	return 0;
+}
+
+static int
+wrap_nettle_cipher_encrypt(void *_ctx, const void *plain, size_t plain_size,
+			   void *encr, size_t encr_size)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+	int ret;
+
+	if (unlikely(ctx->cipher->encrypt == NULL))
+		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+
+	switch (ctx->cipher->algo) {
+	case GNUTLS_CIPHER_AES_128_GCM:
+	case GNUTLS_CIPHER_AES_192_GCM:
+	case GNUTLS_CIPHER_AES_256_GCM:
+		ret = record_aes_gcm_encrypt_size(&ctx->rekey_counter, plain_size);
+		if (ret < 0) {
+			return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+		}
+		break;
+	default:
+		break;
+	}
+
+	ctx->cipher->encrypt(ctx, plain_size, encr, plain);
+
+	return 0;
+}
+
+static int
+wrap_nettle_cipher_aead_encrypt(void *_ctx,
+				const void *nonce, size_t nonce_size,
+				const void *auth, size_t auth_size,
+				size_t tag_size,
+				const void *plain, size_t plain_size,
+				void *encr, size_t encr_size)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+
+	if (ctx->cipher->aead_encrypt == NULL) {
+		/* proper AEAD cipher */
+		if (encr_size < plain_size + tag_size)
+			return gnutls_assert_val(GNUTLS_E_SHORT_MEMORY_BUFFER);
+
+		ctx->cipher->set_iv(ctx->ctx_ptr, nonce_size, nonce);
+		ctx->cipher->auth(ctx->ctx_ptr, auth_size, auth);
+
+		ctx->cipher->encrypt(ctx, plain_size, encr, plain);
+
+		ctx->cipher->tag(ctx->ctx_ptr, tag_size, ((uint8_t*)encr) + plain_size);
+	} else {
+		/* CCM-style cipher */
+		ctx->cipher->aead_encrypt(ctx,
+					  nonce_size, nonce,
+					  auth_size, auth,
+					  tag_size,
+					  tag_size+plain_size, encr,
+					  plain);
+	}
+	return 0;
+}
+
+static int
+wrap_nettle_cipher_aead_decrypt(void *_ctx,
+				const void *nonce, size_t nonce_size,
+				const void *auth, size_t auth_size,
+				size_t tag_size,
+				const void *encr, size_t encr_size,
+				void *plain, size_t plain_size)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+	int ret;
+
+	if (unlikely(encr_size < tag_size))
+		return gnutls_assert_val(GNUTLS_E_DECRYPTION_FAILED);
+
+	if (ctx->cipher->aead_decrypt == NULL) {
+		/* proper AEAD cipher */
+		uint8_t tag[MAX_HASH_SIZE];
+
+		ctx->cipher->set_iv(ctx->ctx_ptr, nonce_size, nonce);
+		ctx->cipher->auth(ctx->ctx_ptr, auth_size, auth);
+
+		encr_size -= tag_size;
+
+		if (unlikely(plain_size < encr_size))
+			return gnutls_assert_val(GNUTLS_E_SHORT_MEMORY_BUFFER);
+
+		ctx->cipher->decrypt(ctx, encr_size, plain, encr);
+
+		ctx->cipher->tag(ctx->ctx_ptr, tag_size, tag);
+
+		if (gnutls_memcmp(((uint8_t*)encr)+encr_size, tag, tag_size) != 0)
+			return gnutls_assert_val(GNUTLS_E_DECRYPTION_FAILED);
+	} else {
+		/* CCM-style cipher */
+		encr_size -= tag_size;
+
+		if (unlikely(plain_size < encr_size))
+			return gnutls_assert_val(GNUTLS_E_SHORT_MEMORY_BUFFER);
+
+		ret = ctx->cipher->aead_decrypt(ctx,
+						nonce_size, nonce,
+						auth_size, auth,
+						tag_size,
+						encr_size, plain,
+						encr);
+		if (unlikely(ret == 0))
+				return gnutls_assert_val(GNUTLS_E_DECRYPTION_FAILED);
+	}
+	return 0;
+}
+
+static int
+wrap_nettle_cipher_auth(void *_ctx, const void *plain, size_t plain_size)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+
+	ctx->cipher->auth(ctx->ctx_ptr, plain_size, plain);
+
+	return 0;
+}
+
+static void wrap_nettle_cipher_tag(void *_ctx, void *tag, size_t tag_size)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+
+	ctx->cipher->tag(ctx->ctx_ptr, tag_size, tag);
+
+}
+
+static void wrap_nettle_cipher_close(void *_ctx)
+{
+	struct nettle_cipher_ctx *ctx = _ctx;
+
+	zeroize_temp_key(ctx->ctx_ptr, ctx->cipher->ctx_size);
+	gnutls_free(ctx);
+}
+
+gnutls_crypto_cipher_st _gnutls_cipher_ops = {
+	.init = wrap_nettle_cipher_init,
+	.exists = wrap_nettle_cipher_exists,
+	.setiv = wrap_nettle_cipher_setiv,
+	.getiv = wrap_nettle_cipher_getiv,
+	.setkey = wrap_nettle_cipher_setkey,
+	.encrypt = wrap_nettle_cipher_encrypt,
+	.decrypt = wrap_nettle_cipher_decrypt,
+	.aead_encrypt = wrap_nettle_cipher_aead_encrypt,
+	.aead_decrypt = wrap_nettle_cipher_aead_decrypt,
+	.deinit = wrap_nettle_cipher_close,
+	.auth = wrap_nettle_cipher_auth,
+	.tag = wrap_nettle_cipher_tag,
+};