#ifndef LIBSSH2_MBEDTLS_H #define LIBSSH2_MBEDTLS_H /* Copyright (C) Art * 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_mbedtls #include #include #include #include #include #include #ifdef MBEDTLS_ECDH_C # include #endif #ifdef MBEDTLS_ECDSA_C # include #endif #include #include #include #include /* Define which features are supported. */ #define LIBSSH2_MD5 1 #define LIBSSH2_HMAC_RIPEMD 1 #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 #ifdef MBEDTLS_CIPHER_BLOWFISH_CBC # define LIBSSH2_BLOWFISH 1 #else # define LIBSSH2_BLOWFISH 0 #endif #ifdef MBEDTLS_CIPHER_ARC4_128 # define LIBSSH2_RC4 1 #else # define LIBSSH2_RC4 0 #endif #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 0 #ifdef MBEDTLS_ECDSA_C # define LIBSSH2_ECDSA 1 #else # define LIBSSH2_ECDSA 0 #endif #define LIBSSH2_ED25519 0 #define LIBSSH2_MLKEM 0 #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) /*******************************************************************/ /* * mbedTLS backend: Generic functions */ #define libssh2_crypto_init() \ _libssh2_mbedtls_init() #define libssh2_crypto_exit() \ _libssh2_mbedtls_free() #define _libssh2_random(buf, len) \ _libssh2_mbedtls_random(buf, len) #define libssh2_prepare_iovec(vec, len) /* Empty. */ /*******************************************************************/ /* * mbedTLS backend: HMAC functions */ #define libssh2_hmac_ctx mbedtls_md_context_t /*******************************************************************/ /* * mbedTLS backend: SHA1 functions */ #define libssh2_sha1_ctx mbedtls_md_context_t #define libssh2_sha1_init(pctx) \ _libssh2_mbedtls_hash_init(pctx, MBEDTLS_MD_SHA1, NULL, 0) #define libssh2_sha1_update(ctx, data, datalen) \ (mbedtls_md_update(&ctx, (const unsigned char *) data, datalen) == 0) #define libssh2_sha1_final(ctx, hash) \ _libssh2_mbedtls_hash_final(&ctx, hash) #define libssh2_sha1(data, datalen, hash) \ _libssh2_mbedtls_hash(data, datalen, MBEDTLS_MD_SHA1, hash) /*******************************************************************/ /* * mbedTLS backend: SHA256 functions */ #define libssh2_sha256_ctx mbedtls_md_context_t #define libssh2_sha256_init(pctx) \ _libssh2_mbedtls_hash_init(pctx, MBEDTLS_MD_SHA256, NULL, 0) #define libssh2_sha256_update(ctx, data, datalen) \ (mbedtls_md_update(&ctx, (const unsigned char *) data, datalen) == 0) #define libssh2_sha256_final(ctx, hash) \ _libssh2_mbedtls_hash_final(&ctx, hash) #define libssh2_sha256(data, datalen, hash) \ _libssh2_mbedtls_hash(data, datalen, MBEDTLS_MD_SHA256, hash) /*******************************************************************/ /* * mbedTLS backend: SHA384 functions */ #define libssh2_sha384_ctx mbedtls_md_context_t #define libssh2_sha384_init(pctx) \ _libssh2_mbedtls_hash_init(pctx, MBEDTLS_MD_SHA384, NULL, 0) #define libssh2_sha384_update(ctx, data, datalen) \ (mbedtls_md_update(&ctx, (const unsigned char *) data, datalen) == 0) #define libssh2_sha384_final(ctx, hash) \ _libssh2_mbedtls_hash_final(&ctx, hash) #define libssh2_sha384(data, datalen, hash) \ _libssh2_mbedtls_hash(data, datalen, MBEDTLS_MD_SHA384, hash) /*******************************************************************/ /* * mbedTLS backend: SHA512 functions */ #define libssh2_sha512_ctx mbedtls_md_context_t #define libssh2_sha512_init(pctx) \ _libssh2_mbedtls_hash_init(pctx, MBEDTLS_MD_SHA512, NULL, 0) #define libssh2_sha512_update(ctx, data, datalen) \ (mbedtls_md_update(&ctx, (const unsigned char *) data, datalen) == 0) #define libssh2_sha512_final(ctx, hash) \ _libssh2_mbedtls_hash_final(&ctx, hash) #define libssh2_sha512(data, datalen, hash) \ _libssh2_mbedtls_hash(data, datalen, MBEDTLS_MD_SHA512, hash) /*******************************************************************/ /* * mbedTLS backend: MD5 functions */ #if LIBSSH2_MD5 || LIBSSH2_MD5_PEM #define libssh2_md5_ctx mbedtls_md_context_t #define libssh2_md5_init(pctx) \ _libssh2_mbedtls_hash_init(pctx, MBEDTLS_MD_MD5, NULL, 0) #define libssh2_md5_update(ctx, data, datalen) \ (mbedtls_md_update(&ctx, (const unsigned char *) data, datalen) == 0) #define libssh2_md5_final(ctx, hash) \ _libssh2_mbedtls_hash_final(&ctx, hash) #endif /*******************************************************************/ /* * mbedTLS backend: RSA functions */ #define libssh2_rsa_ctx mbedtls_rsa_context #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_mbedtls_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_mbedtls_rsa_new_private(rsactx, s, filename, passphrase) #define _libssh2_rsa_new_private_frommemory(rsactx, s, filedata, \ filedata_len, passphrase) \ _libssh2_mbedtls_rsa_new_private_frommemory(rsactx, s, filedata, \ filedata_len, passphrase) #define _libssh2_rsa_sha1_sign(s, rsactx, hash, hash_len, sig, sig_len) \ _libssh2_mbedtls_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_mbedtls_rsa_sha2_sign(s, rsactx, hash, hash_len, sig, sig_len) #define _libssh2_rsa_sha1_verify(rsactx, sig, sig_len, m, m_len) \ _libssh2_mbedtls_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_mbedtls_rsa_sha2_verify(rsactx, hash_len, sig, sig_len, m, m_len) #define _libssh2_rsa_free(rsactx) \ _libssh2_mbedtls_rsa_free(rsactx) /*******************************************************************/ /* * mbedTLS backend: ECDSA structures */ #if LIBSSH2_ECDSA typedef enum { #ifdef MBEDTLS_ECP_DP_SECP256R1_ENABLED LIBSSH2_EC_CURVE_NISTP256 = MBEDTLS_ECP_DP_SECP256R1, #else LIBSSH2_EC_CURVE_NISTP256 = MBEDTLS_ECP_DP_NONE, #endif #ifdef MBEDTLS_ECP_DP_SECP384R1_ENABLED LIBSSH2_EC_CURVE_NISTP384 = MBEDTLS_ECP_DP_SECP384R1, #else LIBSSH2_EC_CURVE_NISTP384 = MBEDTLS_ECP_DP_NONE, #endif #ifdef MBEDTLS_ECP_DP_SECP521R1_ENABLED LIBSSH2_EC_CURVE_NISTP521 = MBEDTLS_ECP_DP_SECP521R1 #else LIBSSH2_EC_CURVE_NISTP521 = MBEDTLS_ECP_DP_NONE, #endif } libssh2_curve_type; # define _libssh2_ec_key mbedtls_ecp_keypair #else # define _libssh2_ec_key void #endif /* LIBSSH2_ECDSA */ /*******************************************************************/ /* * mbedTLS backend: ECDSA functions */ #if LIBSSH2_ECDSA #define libssh2_ecdsa_ctx mbedtls_ecdsa_context #define _libssh2_ecdsa_create_key(session, privkey, pubkey_octal, \ pubkey_octal_len, curve) \ _libssh2_mbedtls_ecdsa_create_key(session, privkey, pubkey_octal, \ pubkey_octal_len, curve) #define _libssh2_ecdsa_curve_name_with_octal_new(ctx, k, k_len, curve) \ _libssh2_mbedtls_ecdsa_curve_name_with_octal_new(ctx, k, k_len, curve) #define _libssh2_ecdh_gen_k(k, privkey, server_pubkey, server_pubkey_len) \ _libssh2_mbedtls_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_mbedtls_ecdsa_verify(ctx, r, r_len, s, s_len, m, m_len) #define _libssh2_ecdsa_new_private(ctx, session, filename, passphrase) \ _libssh2_mbedtls_ecdsa_new_private(ctx, session, filename, passphrase) #define _libssh2_ecdsa_new_private_frommemory(ctx, session, filedata, \ filedata_len, passphrase) \ _libssh2_mbedtls_ecdsa_new_private_frommemory(ctx, session, filedata, \ filedata_len, passphrase) #define _libssh2_ecdsa_sign(session, ctx, hash, hash_len, sign, sign_len) \ _libssh2_mbedtls_ecdsa_sign(session, ctx, hash, hash_len, sign, sign_len) #define _libssh2_ecdsa_get_curve_type(ctx) \ _libssh2_mbedtls_ecdsa_get_curve_type(ctx) #define _libssh2_ecdsa_free(ctx) \ _libssh2_mbedtls_ecdsa_free(ctx) #endif /* LIBSSH2_ECDSA */ /*******************************************************************/ /* * mbedTLS backend: Key functions */ #define _libssh2_pub_priv_keyfile(s, m, m_len, p, p_len, pk, pw) \ _libssh2_mbedtls_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_mbedtls_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_mbedtls_sk_pub_keyfilememory(s, m, m_len, p, p_len, alg, app, \ f, kh, kh_len, pk, pk_len, pw) /*******************************************************************/ /* * mbedTLS backend: Cipher Context structure */ #define _libssh2_cipher_ctx mbedtls_cipher_context_t #define _libssh2_cipher_type(algo) mbedtls_cipher_type_t algo #define _libssh2_cipher_aes256ctr MBEDTLS_CIPHER_AES_256_CTR #define _libssh2_cipher_aes192ctr MBEDTLS_CIPHER_AES_192_CTR #define _libssh2_cipher_aes128ctr MBEDTLS_CIPHER_AES_128_CTR #define _libssh2_cipher_aes256 MBEDTLS_CIPHER_AES_256_CBC #define _libssh2_cipher_aes192 MBEDTLS_CIPHER_AES_192_CBC #define _libssh2_cipher_aes128 MBEDTLS_CIPHER_AES_128_CBC #ifdef MBEDTLS_CIPHER_BLOWFISH_CBC #define _libssh2_cipher_blowfish MBEDTLS_CIPHER_BLOWFISH_CBC #endif #ifdef MBEDTLS_CIPHER_ARC4_128 #define _libssh2_cipher_arcfour MBEDTLS_CIPHER_ARC4_128 #endif #define _libssh2_cipher_3des MBEDTLS_CIPHER_DES_EDE3_CBC #define _libssh2_cipher_chacha20 MBEDTLS_CIPHER_CHACHA20_POLY1305 /*******************************************************************/ /* * mbedTLS backend: Cipher functions */ #define _libssh2_cipher_init(ctx, type, iv, secret, encrypt) \ _libssh2_mbedtls_cipher_init(ctx, type, iv, secret, encrypt) #define _libssh2_cipher_crypt(ctx, type, encrypt, block, blocklen, fl) \ _libssh2_mbedtls_cipher_crypt(ctx, type, encrypt, block, blocklen, fl) #define _libssh2_cipher_dtor(ctx) \ _libssh2_mbedtls_cipher_dtor(ctx) /*******************************************************************/ /* * mbedTLS backend: BigNumber Support */ #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 */ #define _libssh2_bn mbedtls_mpi #define _libssh2_bn_init() \ _libssh2_mbedtls_bignum_init() #define _libssh2_bn_init_from_bin() \ _libssh2_mbedtls_bignum_init() #define _libssh2_bn_set_word(bn, word) \ mbedtls_mpi_lset(bn, word) #define _libssh2_bn_from_bin(bn, len, bin) \ mbedtls_mpi_read_binary(bn, bin, len) #define _libssh2_bn_to_bin(bn, bin) \ mbedtls_mpi_write_binary(bn, bin, mbedtls_mpi_size(bn)) #define _libssh2_bn_bytes(bn) \ mbedtls_mpi_size(bn) #define _libssh2_bn_bits(bn) \ mbedtls_mpi_bitlen(bn) #define _libssh2_bn_free(bn) \ _libssh2_mbedtls_bignum_free(bn) /*******************************************************************/ /* * mbedTLS 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 8192 #define LIBSSH2_DH_MAX_MODULUS_BITS 16384 #define _libssh2_dh_ctx mbedtls_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) /*******************************************************************/ /* * mbedTLS backend: forward declarations */ void _libssh2_mbedtls_init(void); void _libssh2_mbedtls_free(void); int _libssh2_mbedtls_random(unsigned char *buf, size_t len); void _libssh2_mbedtls_cipher_dtor(_libssh2_cipher_ctx *ctx); int _libssh2_mbedtls_hash_init(mbedtls_md_context_t *ctx, mbedtls_md_type_t mdtype, const unsigned char *key, size_t keylen); int _libssh2_mbedtls_hash_final(mbedtls_md_context_t *ctx, unsigned char *hash); int _libssh2_mbedtls_hash(const unsigned char *data, size_t datalen, mbedtls_md_type_t mdtype, unsigned char *hash); _libssh2_bn * _libssh2_mbedtls_bignum_init(void); void _libssh2_mbedtls_bignum_free(_libssh2_bn *bn); void _libssh2_mbedtls_rsa_free(libssh2_rsa_ctx *rsa); #if LIBSSH2_ECDSA libssh2_curve_type _libssh2_mbedtls_ecdsa_key_get_curve_type(libssh2_ecdsa_ctx *ctx); int _libssh2_mbedtls_ecdsa_curve_type_from_name(const char *name, libssh2_curve_type *type); void _libssh2_mbedtls_ecdsa_free(libssh2_ecdsa_ctx *ctx); #endif /* LIBSSH2_ECDSA */ extern void _libssh2_init_aes_ctr(void); 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_MBEDTLS_H */