diff options
Diffstat (limited to 'libs/libssh2/src/wincng.h')
| -rw-r--r-- | libs/libssh2/src/wincng.h | 561 |
1 files changed, 561 insertions, 0 deletions
diff --git a/libs/libssh2/src/wincng.h b/libs/libssh2/src/wincng.h new file mode 100644 index 0000000000..a8d0d80575 --- /dev/null +++ b/libs/libssh2/src/wincng.h @@ -0,0 +1,561 @@ +#ifndef LIBSSH2_WINCNG_H +#define LIBSSH2_WINCNG_H +/* + * Copyright (C) Marc Hoersken <info@marc-hoersken.de> + * 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. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#define LIBSSH2_CRYPTO_ENGINE libssh2_wincng + +/* required for cross-compilation against the w64 mingw-runtime package */ +#if defined(_WIN32_WINNT) && (_WIN32_WINNT < 0x0600) +#undef _WIN32_WINNT +#endif +#ifndef _WIN32_WINNT +#define _WIN32_WINNT 0x0600 +#endif + +#include <windows.h> +#include <bcrypt.h> + +#define LIBSSH2_MD5 1 + +#define LIBSSH2_HMAC_RIPEMD 0 +#define LIBSSH2_HMAC_SHA256 1 +#define LIBSSH2_HMAC_SHA512 1 + +#define LIBSSH2_AES_CBC 1 +#define LIBSSH2_AES_CTR 1 +#define LIBSSH2_AES_GCM 0 +#define LIBSSH2_BLOWFISH 0 +#define LIBSSH2_RC4 1 +#define LIBSSH2_CAST 0 +#define LIBSSH2_3DES 1 + +#define LIBSSH2_RSA 1 +#define LIBSSH2_RSA_SHA1 1 +#define LIBSSH2_RSA_SHA2 1 +#define LIBSSH2_DSA 1 +#define LIBSSH2_ED25519 0 + +/* + * Conditionally enable ECDSA support. + * + * ECDSA support requires the use of + * + * BCryptDeriveKey(..., BCRYPT_KDF_RAW_SECRET, ... ) + * + * This functionality is only available as of Windows 10. To maintain + * backward compatibility, ECDSA support is therefore disabled + * by default and needs to be explicitly enabled using a build + * flag. + */ +#ifdef LIBSSH2_ECDSA_WINCNG +#define LIBSSH2_ECDSA 1 +#else +#define LIBSSH2_ECDSA 0 +#endif + +#include "crypto_config.h" + +#if LIBSSH2_MD5 || LIBSSH2_MD5_PEM +#define MD5_DIGEST_LENGTH 16 +#endif +#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) + +#if LIBSSH2_ECDSA +#else +#define _libssh2_ec_key void +#endif + +/*******************************************************************/ +/* + * Windows CNG backend: Global context handles + */ + +struct _libssh2_wincng_ctx { + BCRYPT_ALG_HANDLE hAlgRNG; + BCRYPT_ALG_HANDLE hAlgHashMD5; + BCRYPT_ALG_HANDLE hAlgHashSHA1; + BCRYPT_ALG_HANDLE hAlgHashSHA256; + BCRYPT_ALG_HANDLE hAlgHashSHA384; + BCRYPT_ALG_HANDLE hAlgHashSHA512; + BCRYPT_ALG_HANDLE hAlgHmacMD5; + BCRYPT_ALG_HANDLE hAlgHmacSHA1; + BCRYPT_ALG_HANDLE hAlgHmacSHA256; + BCRYPT_ALG_HANDLE hAlgHmacSHA384; + BCRYPT_ALG_HANDLE hAlgHmacSHA512; + BCRYPT_ALG_HANDLE hAlgRSA; + BCRYPT_ALG_HANDLE hAlgDSA; + BCRYPT_ALG_HANDLE hAlgAES_CBC; + BCRYPT_ALG_HANDLE hAlgAES_ECB; + BCRYPT_ALG_HANDLE hAlgRC4_NA; + BCRYPT_ALG_HANDLE hAlg3DES_CBC; + BCRYPT_ALG_HANDLE hAlgDH; + BCRYPT_ALG_HANDLE hAlgChacha20; +#if LIBSSH2_ECDSA + BCRYPT_ALG_HANDLE hAlgECDH[3]; /* indexed by libssh2_curve_type */ + BCRYPT_ALG_HANDLE hAlgECDSA[3]; /* indexed by libssh2_curve_type */ +#endif + volatile int hasAlgDHwithKDF; /* -1=no, 0=maybe, 1=yes */ +}; + +extern struct _libssh2_wincng_ctx _libssh2_wincng; + + +/*******************************************************************/ +/* + * Windows CNG backend: Generic functions + */ + +#define libssh2_crypto_init() \ + _libssh2_wincng_init() +#define libssh2_crypto_exit() \ + _libssh2_wincng_free() + +#define _libssh2_random(buf, len) \ + _libssh2_wincng_random(buf, len) + +#define libssh2_prepare_iovec(vec, len) /* Empty. */ + + +/*******************************************************************/ +/* + * Windows CNG backend: Hash structure + */ + +typedef struct __libssh2_wincng_hash_ctx { + BCRYPT_HASH_HANDLE hHash; + unsigned char *pbHashObject; + ULONG dwHashObject; + ULONG cbHash; +} _libssh2_wincng_hash_ctx; + +/* + * Windows CNG backend: Hash functions + */ + +#define libssh2_sha1_ctx _libssh2_wincng_hash_ctx +#define libssh2_sha1_init(ctx) \ + (_libssh2_wincng_hash_init(ctx, _libssh2_wincng.hAlgHashSHA1, \ + SHA_DIGEST_LENGTH, NULL, 0) == 0) +#define libssh2_sha1_update(ctx, data, datalen) \ + (_libssh2_wincng_hash_update(&ctx, data, (ULONG) datalen) == 0) +#define libssh2_sha1_final(ctx, hash) \ + (_libssh2_wincng_hash_final(&ctx, hash) == 0) +#define libssh2_sha1(data, datalen, hash) \ + _libssh2_wincng_hash(data, datalen, _libssh2_wincng.hAlgHashSHA1, \ + hash, SHA_DIGEST_LENGTH) + +#define libssh2_sha256_ctx _libssh2_wincng_hash_ctx +#define libssh2_sha256_init(ctx) \ + (_libssh2_wincng_hash_init(ctx, _libssh2_wincng.hAlgHashSHA256, \ + SHA256_DIGEST_LENGTH, NULL, 0) == 0) +#define libssh2_sha256_update(ctx, data, datalen) \ + (_libssh2_wincng_hash_update(&ctx, data, (ULONG) datalen) == 0) +#define libssh2_sha256_final(ctx, hash) \ + (_libssh2_wincng_hash_final(&ctx, hash) == 0) +#define libssh2_sha256(data, datalen, hash) \ + _libssh2_wincng_hash(data, datalen, _libssh2_wincng.hAlgHashSHA256, \ + hash, SHA256_DIGEST_LENGTH) + +#define libssh2_sha384_ctx _libssh2_wincng_hash_ctx +#define libssh2_sha384_init(ctx) \ + (_libssh2_wincng_hash_init(ctx, _libssh2_wincng.hAlgHashSHA384, \ + SHA384_DIGEST_LENGTH, NULL, 0) == 0) +#define libssh2_sha384_update(ctx, data, datalen) \ + (_libssh2_wincng_hash_update(&ctx, data, (ULONG) datalen) == 0) +#define libssh2_sha384_final(ctx, hash) \ + (_libssh2_wincng_hash_final(&ctx, hash) == 0) +#define libssh2_sha384(data, datalen, hash) \ + _libssh2_wincng_hash(data, datalen, _libssh2_wincng.hAlgHashSHA384, \ + hash, SHA384_DIGEST_LENGTH) + +#define libssh2_sha512_ctx _libssh2_wincng_hash_ctx +#define libssh2_sha512_init(ctx) \ + (_libssh2_wincng_hash_init(ctx, _libssh2_wincng.hAlgHashSHA512, \ + SHA512_DIGEST_LENGTH, NULL, 0) == 0) +#define libssh2_sha512_update(ctx, data, datalen) \ + (_libssh2_wincng_hash_update(&ctx, data, (ULONG) datalen) == 0) +#define libssh2_sha512_final(ctx, hash) \ + (_libssh2_wincng_hash_final(&ctx, hash) == 0) +#define libssh2_sha512(data, datalen, hash) \ + _libssh2_wincng_hash(data, datalen, _libssh2_wincng.hAlgHashSHA512, \ + hash, SHA512_DIGEST_LENGTH) + +#if LIBSSH2_MD5 || LIBSSH2_MD5_PEM +#define libssh2_md5_ctx _libssh2_wincng_hash_ctx +#define libssh2_md5_init(ctx) \ + (_libssh2_wincng_hash_init(ctx, _libssh2_wincng.hAlgHashMD5, \ + MD5_DIGEST_LENGTH, NULL, 0) == 0) +#define libssh2_md5_update(ctx, data, datalen) \ + (_libssh2_wincng_hash_update(&ctx, data, (ULONG) datalen) == 0) +#define libssh2_md5_final(ctx, hash) \ + (_libssh2_wincng_hash_final(&ctx, hash) == 0) +#endif + +/* + * Windows CNG backend: HMAC functions + */ + +#define libssh2_hmac_ctx _libssh2_wincng_hash_ctx + + +/*******************************************************************/ +/* + * Windows CNG backend: Key Context structure + */ + +typedef struct __libssh2_wincng_key_ctx { + BCRYPT_KEY_HANDLE hKey; + void *pbKeyObject; + DWORD cbKeyObject; +} _libssh2_wincng_key_ctx; + + +/* + * Windows CNG backend: RSA functions + */ + +#define libssh2_rsa_ctx _libssh2_wincng_key_ctx +#define _libssh2_rsa_new(rsactx, e, e_len, n, n_len, \ + d, d_len, p, p_len, q, q_len, \ + e1, e1_len, e2, e2_len, c, c_len) \ + _libssh2_wincng_rsa_new(rsactx, e, e_len, n, n_len, \ + d, d_len, p, p_len, q, q_len, \ + e1, e1_len, e2, e2_len, c, c_len) +#define _libssh2_rsa_new_private(rsactx, s, filename, passphrase) \ + _libssh2_wincng_rsa_new_private(rsactx, s, filename, passphrase) +#define _libssh2_rsa_new_private_frommemory(rsactx, s, filedata, \ + filedata_len, passphrase) \ + _libssh2_wincng_rsa_new_private_frommemory(rsactx, s, filedata, \ + filedata_len, passphrase) +#define _libssh2_rsa_sha1_sign(s, rsactx, hash, hash_len, sig, sig_len) \ + _libssh2_wincng_rsa_sha1_sign(s, rsactx, hash, hash_len, sig, sig_len) +#define _libssh2_rsa_sha2_sign(s, rsactx, hash, hash_len, sig, sig_len) \ + _libssh2_wincng_rsa_sha2_sign(s, rsactx, hash, hash_len, sig, sig_len) +#define _libssh2_rsa_sha1_verify(rsactx, sig, sig_len, m, m_len) \ + _libssh2_wincng_rsa_sha1_verify(rsactx, sig, sig_len, m, m_len) +#define _libssh2_rsa_sha2_verify(rsactx, hash_len, sig, sig_len, m, m_len) \ + _libssh2_wincng_rsa_sha2_verify(rsactx, hash_len, sig, sig_len, m, m_len) +#define _libssh2_rsa_free(rsactx) \ + _libssh2_wincng_rsa_free(rsactx) + +/* + * Windows CNG backend: DSA functions + */ + +#define libssh2_dsa_ctx _libssh2_wincng_key_ctx +#define _libssh2_dsa_new(dsactx, p, p_len, q, q_len, \ + g, g_len, y, y_len, x, x_len) \ + _libssh2_wincng_dsa_new(dsactx, p, p_len, q, q_len, \ + g, g_len, y, y_len, x, x_len) +#define _libssh2_dsa_new_private(dsactx, s, filename, passphrase) \ + _libssh2_wincng_dsa_new_private(dsactx, s, filename, passphrase) +#define _libssh2_dsa_new_private_frommemory(dsactx, s, filedata, \ + filedata_len, passphrase) \ + _libssh2_wincng_dsa_new_private_frommemory(dsactx, s, filedata, \ + filedata_len, passphrase) +#define _libssh2_dsa_sha1_sign(dsactx, hash, hash_len, sig) \ + _libssh2_wincng_dsa_sha1_sign(dsactx, hash, hash_len, sig) +#define _libssh2_dsa_sha1_verify(dsactx, sig, m, m_len) \ + _libssh2_wincng_dsa_sha1_verify(dsactx, sig, m, m_len) +#define _libssh2_dsa_free(dsactx) \ + _libssh2_wincng_dsa_free(dsactx) + + +/* + * Windows CNG backend: ECDSA functions + */ + +typedef enum { + LIBSSH2_EC_CURVE_NISTP256 = 0, + LIBSSH2_EC_CURVE_NISTP384 = 1, + LIBSSH2_EC_CURVE_NISTP521 = 2, +} libssh2_curve_type; + +typedef struct __libssh2_wincng_ecdsa_ctx { + BCRYPT_KEY_HANDLE handle; + libssh2_curve_type curve; +} _libssh2_wincng_ecdsa_key; + +#define libssh2_ecdsa_ctx _libssh2_wincng_ecdsa_key + +#if LIBSSH2_ECDSA +#define _libssh2_ec_key _libssh2_wincng_ecdsa_key +#endif + +void +_libssh2_wincng_ecdsa_free(libssh2_ecdsa_ctx* ctx); + +#define _libssh2_ecdsa_create_key(session, privkey, pubkey_octal, \ + pubkey_octal_len, curve) \ + _libssh2_wincng_ecdh_create_key(session, privkey, pubkey_octal, \ + pubkey_octal_len, curve) + +#define _libssh2_ecdsa_curve_name_with_octal_new(ctx, k, k_len, curve) \ + _libssh2_wincng_ecdsa_curve_name_with_octal_new(ctx, k, k_len, curve) + +#define _libssh2_ecdh_gen_k(k, privkey, server_pubkey, server_pubkey_len) \ + _libssh2_wincng_ecdh_gen_k(k, privkey, server_pubkey, server_pubkey_len) + +#define _libssh2_ecdsa_verify(ctx, r, r_len, s, s_len, m, m_len) \ + _libssh2_wincng_ecdsa_verify(ctx, r, r_len, s, s_len, m, m_len) + +#define _libssh2_ecdsa_new_private(ctx, session, filename, passphrase) \ + _libssh2_wincng_ecdsa_new_private(ctx, session, filename, passphrase) + +#define _libssh2_ecdsa_new_private_frommemory(ctx, session, filedata, \ + filedata_len, passphrase) \ + _libssh2_wincng_ecdsa_new_private_frommemory(ctx, session, filedata, \ + filedata_len, passphrase) + +#define _libssh2_ecdsa_sign(session, ctx, hash, hash_len, sign, sign_len) \ + _libssh2_wincng_ecdsa_sign(session, ctx, hash, hash_len, sign, sign_len) + +#define _libssh2_ecdsa_get_curve_type(ctx) \ + _libssh2_wincng_ecdsa_get_curve_type(ctx) + +#define _libssh2_ecdsa_free(ecdsactx) \ + _libssh2_wincng_ecdsa_free(ecdsactx) + + +/* + * Windows CNG backend: Key functions + */ + +#define _libssh2_pub_priv_keyfile(s, m, m_len, p, p_len, pk, pw) \ + _libssh2_wincng_pub_priv_keyfile(s, m, m_len, p, p_len, pk, pw) +#define _libssh2_pub_priv_keyfilememory(s, m, m_len, p, p_len, \ + pk, pk_len, pw) \ + _libssh2_wincng_pub_priv_keyfilememory(s, m, m_len, p, p_len, \ + pk, pk_len, pw) +#define _libssh2_sk_pub_keyfilememory(s, m, m_len, p, p_len, alg, app, \ + f, kh, kh_len, pk, pk_len, pw) \ + _libssh2_wincng_sk_pub_keyfilememory(s, m, m_len, p, p_len, alg, app, \ + f, kh, kh_len, pk, pk_len, pw) + +/*******************************************************************/ +/* + * Windows CNG backend: Cipher Context structure + */ + +struct _libssh2_wincng_cipher_ctx { + BCRYPT_KEY_HANDLE hKey; + unsigned char *pbKeyObject; + unsigned char *pbIV; + unsigned char *pbCtr; + ULONG dwKeyObject; + ULONG dwIV; + ULONG dwBlockLength; + ULONG dwCtrLength; +}; + +#define _libssh2_cipher_ctx struct _libssh2_wincng_cipher_ctx + +/* + * Windows CNG backend: Cipher Type structure + */ + +struct _libssh2_wincng_cipher_type { + BCRYPT_ALG_HANDLE *phAlg; + ULONG dwKeyLength; + int useIV; /* TODO: Convert to bool when a C89 compatible bool type + is defined */ + int ctrMode; +}; + +#define _libssh2_cipher_type(type) struct _libssh2_wincng_cipher_type type + +#define _libssh2_cipher_aes256ctr { &_libssh2_wincng.hAlgAES_ECB, 32, 0, 1 } +#define _libssh2_cipher_aes192ctr { &_libssh2_wincng.hAlgAES_ECB, 24, 0, 1 } +#define _libssh2_cipher_aes128ctr { &_libssh2_wincng.hAlgAES_ECB, 16, 0, 1 } +#define _libssh2_cipher_aes256 { &_libssh2_wincng.hAlgAES_CBC, 32, 1, 0 } +#define _libssh2_cipher_aes192 { &_libssh2_wincng.hAlgAES_CBC, 24, 1, 0 } +#define _libssh2_cipher_aes128 { &_libssh2_wincng.hAlgAES_CBC, 16, 1, 0 } +#define _libssh2_cipher_arcfour { &_libssh2_wincng.hAlgRC4_NA, 16, 0, 0 } +#define _libssh2_cipher_3des { &_libssh2_wincng.hAlg3DES_CBC, 24, 1, 0 } +#define _libssh2_cipher_chacha20 { &_libssh2_wincng.hAlgChacha20, 24, 1, 0 } + +/* + * Windows CNG backend: Cipher functions + */ + +#define _libssh2_cipher_init(ctx, type, iv, secret, encrypt) \ + _libssh2_wincng_cipher_init(ctx, type, iv, secret, encrypt) +#define _libssh2_cipher_crypt(ctx, type, encrypt, block, blocklen, fl) \ + _libssh2_wincng_cipher_crypt(ctx, type, encrypt, block, blocklen, fl) +#define _libssh2_cipher_dtor(ctx) \ + _libssh2_wincng_cipher_dtor(ctx) + +/*******************************************************************/ +/* + * Windows CNG backend: BigNumber Context + */ + +#define _libssh2_bn_ctx int /* not used */ +#define _libssh2_bn_ctx_new() 0 /* not used */ +#define _libssh2_bn_ctx_free(bnctx) ((void)0) /* not used */ + + +/*******************************************************************/ +/* + * Windows CNG backend: BigNumber structure + */ + +struct _libssh2_wincng_bignum { + unsigned char *bignum; + ULONG length; +}; + +#define _libssh2_bn struct _libssh2_wincng_bignum + +/* + * Windows CNG backend: BigNumber functions + */ + +#define _libssh2_bn_init() \ + _libssh2_wincng_bignum_init() +#define _libssh2_bn_init_from_bin() \ + _libssh2_bn_init() +#define _libssh2_bn_set_word(bn, word) \ + _libssh2_wincng_bignum_set_word(bn, word) +#define _libssh2_bn_from_bin(bn, len, bin) \ + _libssh2_wincng_bignum_from_bin(bn, (ULONG) len, bin) +#define _libssh2_bn_to_bin(bn, bin) \ + _libssh2_wincng_bignum_to_bin(bn, bin) +#define _libssh2_bn_bytes(bn) bn->length +#define _libssh2_bn_bits(bn) \ + _libssh2_wincng_bignum_bits(bn) +#define _libssh2_bn_free(bn) \ + _libssh2_wincng_bignum_free(bn) + +/* + * Windows CNG backend: Diffie-Hellman support + */ + +/* Default generate and safe prime sizes for + diffie-hellman-group-exchange-sha1 */ +#define LIBSSH2_DH_GEX_MINGROUP 2048 +#define LIBSSH2_DH_GEX_OPTGROUP 4096 +#define LIBSSH2_DH_GEX_MAXGROUP 4096 + +#define LIBSSH2_DH_MAX_MODULUS_BITS 16384 + +typedef struct { + /* holds our private and public key components */ + BCRYPT_KEY_HANDLE dh_handle; + /* records the parsed out modulus and generator + * parameters that are shared with the peer */ + BCRYPT_DH_PARAMETER_HEADER *dh_params; + /* records the parsed out private key component for + * fallback if the DH API raw KDF is not supported */ + struct _libssh2_wincng_bignum *dh_privbn; +} _libssh2_dh_ctx; + +#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) + +/*******************************************************************/ +/* + * Windows CNG backend: forward declarations + */ +void _libssh2_wincng_init(void); +void _libssh2_wincng_free(void); +int _libssh2_wincng_random(void *buf, size_t len); + +int +_libssh2_wincng_hash_init(_libssh2_wincng_hash_ctx *ctx, + BCRYPT_ALG_HANDLE hAlg, ULONG hashlen, + unsigned char *key, ULONG keylen); +int +_libssh2_wincng_hash_update(_libssh2_wincng_hash_ctx *ctx, + const void *data, ULONG datalen); +int +_libssh2_wincng_hash_final(_libssh2_wincng_hash_ctx *ctx, + unsigned char *hash); +int +_libssh2_wincng_hash(const unsigned char *data, ULONG datalen, + BCRYPT_ALG_HANDLE hAlg, + unsigned char *hash, ULONG hashlen); + +void +_libssh2_wincng_rsa_free(libssh2_rsa_ctx *rsa); + +#if LIBSSH2_DSA +void +_libssh2_wincng_dsa_free(libssh2_dsa_ctx *dsa); +#endif + +void +_libssh2_wincng_cipher_dtor(_libssh2_cipher_ctx *ctx); + +_libssh2_bn * +_libssh2_wincng_bignum_init(void); +int +_libssh2_wincng_bignum_set_word(_libssh2_bn *bn, ULONG word); +ULONG +_libssh2_wincng_bignum_bits(const _libssh2_bn *bn); +int +_libssh2_wincng_bignum_from_bin(_libssh2_bn *bn, ULONG len, + const unsigned char *bin); +int +_libssh2_wincng_bignum_to_bin(const _libssh2_bn *bn, unsigned char *bin); +void +_libssh2_wincng_bignum_free(_libssh2_bn *bn); +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); + +#endif /* LIBSSH2_WINCNG_H */ |