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/*
* Copyright (C) 2008, 2009, 2010 Simon Josefsson
* Copyright (C) 2006, 2007, The Written Word, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* Neither the name of the copyright holder nor the names
* of any other contributors may be used to endorse or
* promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#include <gcrypt.h>
#define LIBSSH2_MD5 1
#define LIBSSH2_HMAC_RIPEMD 1
#define LIBSSH2_HMAC_SHA256 1
#define LIBSSH2_HMAC_SHA512 1
#define LIBSSH2_AES 1
#define LIBSSH2_AES_CTR 1
#define LIBSSH2_BLOWFISH 1
#define LIBSSH2_RC4 1
#define LIBSSH2_CAST 1
#define LIBSSH2_3DES 1
#define LIBSSH2_RSA 1
#define LIBSSH2_DSA 1
#define LIBSSH2_ECDSA 0
#define LIBSSH2_ED25519 0
#define MD5_DIGEST_LENGTH 16
#define SHA_DIGEST_LENGTH 20
#define SHA256_DIGEST_LENGTH 32
#define SHA384_DIGEST_LENGTH 48
#define SHA512_DIGEST_LENGTH 64
#define EC_MAX_POINT_LEN ((528 * 2 / 8) + 1)
#define _libssh2_random(buf, len) \
(gcry_randomize ((buf), (len), GCRY_STRONG_RANDOM), 1)
#define libssh2_prepare_iovec(vec, len) /* Empty. */
#define libssh2_sha1_ctx gcry_md_hd_t
/* returns 0 in case of failure */
#define libssh2_sha1_init(ctx) \
(GPG_ERR_NO_ERROR == gcry_md_open(ctx, GCRY_MD_SHA1, 0))
#define libssh2_sha1_update(ctx, data, len) \
gcry_md_write(ctx, (unsigned char *) data, len)
#define libssh2_sha1_final(ctx, out) \
memcpy(out, gcry_md_read(ctx, 0), SHA_DIGEST_LENGTH), gcry_md_close(ctx)
#define libssh2_sha1(message, len, out) \
gcry_md_hash_buffer(GCRY_MD_SHA1, out, message, len)
#define libssh2_sha256_ctx gcry_md_hd_t
#define libssh2_sha256_init(ctx) \
(GPG_ERR_NO_ERROR == gcry_md_open(ctx, GCRY_MD_SHA256, 0))
#define libssh2_sha256_update(ctx, data, len) \
gcry_md_write(ctx, (unsigned char *) data, len)
#define libssh2_sha256_final(ctx, out) \
memcpy(out, gcry_md_read(ctx, 0), SHA256_DIGEST_LENGTH), gcry_md_close(ctx)
#define libssh2_sha256(message, len, out) \
gcry_md_hash_buffer(GCRY_MD_SHA256, out, message, len)
#define libssh2_sha384_ctx gcry_md_hd_t
#define libssh2_sha384_init(ctx) \
(GPG_ERR_NO_ERROR == gcry_md_open(ctx, GCRY_MD_SHA384, 0))
#define libssh2_sha384_update(ctx, data, len) \
gcry_md_write(ctx, (unsigned char *) data, len)
#define libssh2_sha384_final(ctx, out) \
memcpy(out, gcry_md_read(ctx, 0), SHA384_DIGEST_LENGTH), gcry_md_close(ctx)
#define libssh2_sha384(message, len, out) \
gcry_md_hash_buffer(GCRY_MD_SHA384, out, message, len)
#define libssh2_sha512_ctx gcry_md_hd_t
#define libssh2_sha512_init(ctx) \
(GPG_ERR_NO_ERROR == gcry_md_open(ctx, GCRY_MD_SHA512, 0))
#define libssh2_sha512_update(ctx, data, len) \
gcry_md_write(ctx, (unsigned char *) data, len)
#define libssh2_sha512_final(ctx, out) \
memcpy(out, gcry_md_read(ctx, 0), SHA512_DIGEST_LENGTH), gcry_md_close(ctx)
#define libssh2_sha512(message, len, out) \
gcry_md_hash_buffer(GCRY_MD_SHA512, out, message, len)
#define libssh2_md5_ctx gcry_md_hd_t
/* returns 0 in case of failure */
#define libssh2_md5_init(ctx) \
(GPG_ERR_NO_ERROR == gcry_md_open(ctx, GCRY_MD_MD5, 0))
#define libssh2_md5_update(ctx, data, len) \
gcry_md_write(ctx, (unsigned char *) data, len)
#define libssh2_md5_final(ctx, out) \
memcpy(out, gcry_md_read(ctx, 0), MD5_DIGEST_LENGTH), gcry_md_close(ctx)
#define libssh2_md5(message, len, out) \
gcry_md_hash_buffer(GCRY_MD_MD5, out, message, len)
#define libssh2_hmac_ctx gcry_md_hd_t
#define libssh2_hmac_ctx_init(ctx)
#define libssh2_hmac_sha1_init(ctx, key, keylen) \
gcry_md_open(ctx, GCRY_MD_SHA1, GCRY_MD_FLAG_HMAC), \
gcry_md_setkey(*ctx, key, keylen)
#define libssh2_hmac_md5_init(ctx, key, keylen) \
gcry_md_open(ctx, GCRY_MD_MD5, GCRY_MD_FLAG_HMAC), \
gcry_md_setkey(*ctx, key, keylen)
#define libssh2_hmac_ripemd160_init(ctx, key, keylen) \
gcry_md_open(ctx, GCRY_MD_RMD160, GCRY_MD_FLAG_HMAC), \
gcry_md_setkey(*ctx, key, keylen)
#define libssh2_hmac_sha256_init(ctx, key, keylen) \
gcry_md_open(ctx, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC), \
gcry_md_setkey(*ctx, key, keylen)
#define libssh2_hmac_sha512_init(ctx, key, keylen) \
gcry_md_open(ctx, GCRY_MD_SHA512, GCRY_MD_FLAG_HMAC), \
gcry_md_setkey(*ctx, key, keylen)
#define libssh2_hmac_update(ctx, data, datalen) \
gcry_md_write(ctx, (unsigned char *) data, datalen)
#define libssh2_hmac_final(ctx, data) \
memcpy(data, gcry_md_read(ctx, 0), \
gcry_md_get_algo_dlen(gcry_md_get_algo(ctx)))
#define libssh2_hmac_cleanup(ctx) gcry_md_close (*ctx);
#define libssh2_crypto_init() gcry_control (GCRYCTL_DISABLE_SECMEM)
#define libssh2_crypto_exit()
#define libssh2_rsa_ctx struct gcry_sexp
#define _libssh2_rsa_free(rsactx) gcry_sexp_release (rsactx)
#define libssh2_dsa_ctx struct gcry_sexp
#define _libssh2_dsa_free(dsactx) gcry_sexp_release (dsactx)
#if LIBSSH2_ECDSA
#else
#define _libssh2_ec_key void
#endif
#define _libssh2_cipher_type(name) int name
#define _libssh2_cipher_ctx gcry_cipher_hd_t
#define _libssh2_gcry_ciphermode(c,m) ((c << 8) | m)
#define _libssh2_gcry_cipher(c) (c >> 8)
#define _libssh2_gcry_mode(m) (m & 0xFF)
#define _libssh2_cipher_aes256ctr \
_libssh2_gcry_ciphermode(GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_CTR)
#define _libssh2_cipher_aes192ctr \
_libssh2_gcry_ciphermode(GCRY_CIPHER_AES192, GCRY_CIPHER_MODE_CTR)
#define _libssh2_cipher_aes128ctr \
_libssh2_gcry_ciphermode(GCRY_CIPHER_AES128, GCRY_CIPHER_MODE_CTR)
#define _libssh2_cipher_aes256 \
_libssh2_gcry_ciphermode(GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_CBC)
#define _libssh2_cipher_aes192 \
_libssh2_gcry_ciphermode(GCRY_CIPHER_AES192, GCRY_CIPHER_MODE_CBC)
#define _libssh2_cipher_aes128 \
_libssh2_gcry_ciphermode(GCRY_CIPHER_AES128, GCRY_CIPHER_MODE_CBC)
#define _libssh2_cipher_blowfish \
_libssh2_gcry_ciphermode(GCRY_CIPHER_BLOWFISH, GCRY_CIPHER_MODE_CBC)
#define _libssh2_cipher_arcfour \
_libssh2_gcry_ciphermode(GCRY_CIPHER_ARCFOUR, GCRY_CIPHER_MODE_STREAM)
#define _libssh2_cipher_cast5 \
_libssh2_gcry_ciphermode(GCRY_CIPHER_CAST5, GCRY_CIPHER_MODE_CBC)
#define _libssh2_cipher_3des \
_libssh2_gcry_ciphermode(GCRY_CIPHER_3DES, GCRY_CIPHER_MODE_CBC)
#define _libssh2_cipher_dtor(ctx) gcry_cipher_close(*(ctx))
#define _libssh2_bn struct gcry_mpi
#define _libssh2_bn_ctx int
#define _libssh2_bn_ctx_new() 0
#define _libssh2_bn_ctx_free(bnctx) ((void)0)
#define _libssh2_bn_init() gcry_mpi_new(0)
#define _libssh2_bn_init_from_bin() NULL /* because gcry_mpi_scan() creates a new bignum */
#define _libssh2_bn_set_word(bn, val) gcry_mpi_set_ui(bn, val)
#define _libssh2_bn_from_bin(bn, len, val) gcry_mpi_scan(&((bn)), GCRYMPI_FMT_USG, val, len, NULL)
#define _libssh2_bn_to_bin(bn, val) gcry_mpi_print (GCRYMPI_FMT_USG, val, _libssh2_bn_bytes(bn), NULL, bn)
#define _libssh2_bn_bytes(bn) (gcry_mpi_get_nbits (bn) / 8 + ((gcry_mpi_get_nbits (bn) % 8 == 0) ? 0 : 1))
#define _libssh2_bn_bits(bn) gcry_mpi_get_nbits (bn)
#define _libssh2_bn_free(bn) gcry_mpi_release(bn)
#define _libssh2_dh_ctx struct gcry_mpi *
#define libssh2_dh_init(dhctx) _libssh2_dh_init(dhctx)
#define libssh2_dh_key_pair(dhctx, public, g, p, group_order, bnctx) \
_libssh2_dh_key_pair(dhctx, public, g, p, group_order)
#define libssh2_dh_secret(dhctx, secret, f, p, bnctx) \
_libssh2_dh_secret(dhctx, secret, f, p)
#define libssh2_dh_dtor(dhctx) _libssh2_dh_dtor(dhctx)
extern void _libssh2_dh_init(_libssh2_dh_ctx *dhctx);
extern int _libssh2_dh_key_pair(_libssh2_dh_ctx *dhctx, _libssh2_bn *public,
_libssh2_bn *g, _libssh2_bn *p,
int group_order);
extern int _libssh2_dh_secret(_libssh2_dh_ctx *dhctx, _libssh2_bn *secret,
_libssh2_bn *f, _libssh2_bn *p);
extern void _libssh2_dh_dtor(_libssh2_dh_ctx *dhctx);