/*
* Copyright (C) 2020 Tobias Brunner
* Copyright (C) 2020-2021 Pascal Knecht
* Copyright (C) 2020 Méline Sieber
* HSR Hochschule fuer Technik Rapperswil
*
* Copyright (C) 2010-2014 Martin Willi
* Copyright (C) 2010-2014 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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 General Public License
* for more details.
*/
#include "tls_crypto.h"
#include "tls_hkdf.h"
#include <utils/debug.h>
#include <plugins/plugin_feature.h>
#include <collections/hashtable.h>
#include <collections/array.h>
ENUM_BEGIN(tls_cipher_suite_names, TLS_NULL_WITH_NULL_NULL,
TLS_DH_anon_WITH_3DES_EDE_CBC_SHA,
"TLS_NULL_WITH_NULL_NULL",
"TLS_RSA_WITH_NULL_MD5",
"TLS_RSA_WITH_NULL_SHA",
"TLS_RSA_EXPORT_WITH_RC4_40_MD5",
"TLS_RSA_WITH_RC4_128_MD5",
"TLS_RSA_WITH_RC4_128_SHA",
"TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5",
"TLS_RSA_WITH_IDEA_CBC_SHA",
"TLS_RSA_EXPORT_WITH_DES40_CBC_SHA",
"TLS_RSA_WITH_DES_CBC_SHA",
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",
"TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA",
"TLS_DH_DSS_WITH_DES_CBC_SHA",
"TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA",
"TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA",
"TLS_DH_RSA_WITH_DES_CBC_SHA",
"TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA",
"TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA",
"TLS_DHE_DSS_WITH_DES_CBC_SHA",
"TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA",
"TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA",
"TLS_DHE_RSA_WITH_DES_CBC_SHA",
"TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA",
"TLS_DH_anon_EXPORT_WITH_RC4_40_MD5",
"TLS_DH_anon_WITH_RC4_128_MD5",
"TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA",
"TLS_DH_anon_WITH_DES_CBC_SHA",
"TLS_DH_anon_WITH_3DES_EDE_CBC_SHA");
ENUM_NEXT(tls_cipher_suite_names, TLS_KRB5_WITH_DES_CBC_SHA,
TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA,
TLS_DH_anon_WITH_3DES_EDE_CBC_SHA,
"TLS_KRB5_WITH_DES_CBC_SHA",
"TLS_KRB5_WITH_3DES_EDE_CBC_SHA",
"TLS_KRB5_WITH_RC4_128_SHA",
"TLS_KRB5_WITH_IDEA_CBC_SHA",
"TLS_KRB5_WITH_DES_CBC_MD5",
"TLS_KRB5_WITH_3DES_EDE_CBC_MD5",
"TLS_KRB5_WITH_RC4_128_MD5",
"TLS_KRB5_WITH_IDEA_CBC_MD5",
"TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA",
"TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA",
"TLS_KRB5_EXPORT_WITH_RC4_40_SHA",
"TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5",
"TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5",
"TLS_KRB5_EXPORT_WITH_RC4_40_MD5",
"TLS_PSK_WITH_NULL_SHA",
"TLS_DHE_PSK_WITH_NULL_SHA",
"TLS_RSA_PSK_WITH_NULL_SHA",
"TLS_RSA_WITH_AES_128_CBC_SHA",
"TLS_DH_DSS_WITH_AES_128_CBC_SHA",
"TLS_DH_RSA_WITH_AES_128_CBC_SHA",
"TLS_DHE_DSS_WITH_AES_128_CBC_SHA",
"TLS_DHE_RSA_WITH_AES_128_CBC_SHA",
"TLS_DH_anon_WITH_AES_128_CBC_SHA",
"TLS_RSA_WITH_AES_256_CBC_SHA",
"TLS_DH_DSS_WITH_AES_256_CBC_SHA",
"TLS_DH_RSA_WITH_AES_256_CBC_SHA",
"TLS_DHE_DSS_WITH_AES_256_CBC_SHA",
"TLS_DHE_RSA_WITH_AES_256_CBC_SHA",
"TLS_DH_anon_WITH_AES_256_CBC_SHA",
"TLS_RSA_WITH_NULL_SHA256",
"TLS_RSA_WITH_AES_128_CBC_SHA256",
"TLS_RSA_WITH_AES_256_CBC_SHA256",
"TLS_DH_DSS_WITH_AES_128_CBC_SHA256",
"TLS_DH_RSA_WITH_AES_128_CBC_SHA256",
"TLS_DHE_DSS_WITH_AES_128_CBC_SHA256",
"TLS_RSA_WITH_CAMELLIA_128_CBC_SHA",
"TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA",
"TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA",
"TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA",
"TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA",
"TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA");
ENUM_NEXT(tls_cipher_suite_names, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
TLS_DH_anon_WITH_AES_256_CBC_SHA256,
TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA,
"TLS_DHE_RSA_WITH_AES_128_CBC_SHA256",
"TLS_DH_DSS_WITH_AES_256_CBC_SHA256",
"TLS_DH_RSA_WITH_AES_256_CBC_SHA256",
"TLS_DHE_DSS_WITH_AES_256_CBC_SHA256",
"TLS_DHE_RSA_WITH_AES_256_CBC_SHA256",
"TLS_DH_anon_WITH_AES_128_CBC_SHA256",
"TLS_DH_anon_WITH_AES_256_CBC_SHA256");
ENUM_NEXT(tls_cipher_suite_names, TLS_RSA_WITH_CAMELLIA_256_CBC_SHA,
TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256,
TLS_DH_anon_WITH_AES_256_CBC_SHA256,
"TLS_RSA_WITH_CAMELLIA_256_CBC_SHA",
"TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA",
"TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA",
"TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA",
"TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA",
"TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA",
"TLS_PSK_WITH_RC4_128_SHA",
"TLS_PSK_WITH_3DES_EDE_CBC_SHA",
"TLS_PSK_WITH_AES_128_CBC_SHA",
"TLS_PSK_WITH_AES_256_CBC_SHA",
"TLS_DHE_PSK_WITH_RC4_128_SHA",
"TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA",
"TLS_DHE_PSK_WITH_AES_128_CBC_SHA",
"TLS_DHE_PSK_WITH_AES_256_CBC_SHA",
"TLS_RSA_PSK_WITH_RC4_128_SHA",
"TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA",
"TLS_RSA_PSK_WITH_AES_128_CBC_SHA",
"TLS_RSA_PSK_WITH_AES_256_CBC_SHA",
"TLS_RSA_WITH_SEED_CBC_SHA",
"TLS_DH_DSS_WITH_SEED_CBC_SHA",
"TLS_DH_RSA_WITH_SEED_CBC_SHA",
"TLS_DHE_DSS_WITH_SEED_CBC_SHA",
"TLS_DHE_RSA_WITH_SEED_CBC_SHA",
"TLS_DH_anon_WITH_SEED_CBC_SHA",
"TLS_RSA_WITH_AES_128_GCM_SHA256",
"TLS_RSA_WITH_AES_256_GCM_SHA384",
"TLS_DHE_RSA_WITH_AES_128_GCM_SHA256",
"TLS_DHE_RSA_WITH_AES_256_GCM_SHA384",
"TLS_DH_RSA_WITH_AES_128_GCM_SHA256",
"TLS_DH_RSA_WITH_AES_256_GCM_SHA384",
"TLS_DHE_DSS_WITH_AES_128_GCM_SHA256",
"TLS_DHE_DSS_WITH_AES_256_GCM_SHA384",
"TLS_DH_DSS_WITH_AES_128_GCM_SHA256",
"TLS_DH_DSS_WITH_AES_256_GCM_SHA384",
"TLS_DH_anon_WITH_AES_128_GCM_SHA256",
"TLS_DH_anon_WITH_AES_256_GCM_SHA384",
"TLS_PSK_WITH_AES_128_GCM_SHA256",
"TLS_PSK_WITH_AES_256_GCM_SHA384",
"TLS_DHE_PSK_WITH_AES_128_GCM_SHA256",
"TLS_DHE_PSK_WITH_AES_256_GCM_SHA384",
"TLS_RSA_PSK_WITH_AES_128_GCM_SHA256",
"TLS_RSA_PSK_WITH_AES_256_GCM_SHA384",
"TLS_PSK_WITH_AES_128_CBC_SHA256",
"TLS_PSK_WITH_AES_256_CBC_SHA384",
"TLS_PSK_WITH_NULL_SHA256",
"TLS_PSK_WITH_NULL_SHA384",
"TLS_DHE_PSK_WITH_AES_128_CBC_SHA256",
"TLS_DHE_PSK_WITH_AES_256_CBC_SHA384",
"TLS_DHE_PSK_WITH_NULL_SHA256",
"TLS_DHE_PSK_WITH_NULL_SHA384",
"TLS_RSA_PSK_WITH_AES_128_CBC_SHA256",
"TLS_RSA_PSK_WITH_AES_256_CBC_SHA384",
"TLS_RSA_PSK_WITH_NULL_SHA256",
"TLS_RSA_PSK_WITH_NULL_SHA384",
"TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256",
"TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256",
"TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256",
"TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256",
"TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256",
"TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256",
"TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256",
"TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256",
"TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256",
"TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256",
"TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256",
"TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256");
ENUM_NEXT(tls_cipher_suite_names, TLS_EMPTY_RENEGOTIATION_INFO_SCSV,
TLS_EMPTY_RENEGOTIATION_INFO_SCSV,
TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256,
"TLS_EMPTY_RENEGOTIATION_INFO_SCSV");
ENUM_NEXT(tls_cipher_suite_names, TLS_AES_128_GCM_SHA256,
TLS_AES_128_CCM_8_SHA256,
TLS_EMPTY_RENEGOTIATION_INFO_SCSV,
"TLS_AES_128_GCM_SHA256",
"TLS_AES_256_GCM_SHA384",
"TLS_CHACHA20_POLY1305_SHA256",
"TLS_AES_128_CCM_SHA256",
"TLS_AES_128_CCM_8_SHA256");
ENUM_NEXT(tls_cipher_suite_names, TLS_ECDH_ECDSA_WITH_NULL_SHA,
TLS_ECDHE_PSK_WITH_NULL_SHA384,
TLS_AES_128_CCM_8_SHA256,
"TLS_ECDH_ECDSA_WITH_NULL_SHA",
"TLS_ECDH_ECDSA_WITH_RC4_128_SHA",
"TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA",
"TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA",
"TLS_ECDHE_ECDSA_WITH_NULL_SHA",
"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA",
"TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA",
"TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA",
"TLS_ECDH_RSA_WITH_NULL_SHA",
"TLS_ECDH_RSA_WITH_RC4_128_SHA",
"TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDH_RSA_WITH_AES_128_CBC_SHA",
"TLS_ECDH_RSA_WITH_AES_256_CBC_SHA",
"TLS_ECDHE_RSA_WITH_NULL_SHA",
"TLS_ECDHE_RSA_WITH_RC4_128_SHA",
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
"TLS_ECDH_anon_WITH_NULL_SHA",
"TLS_ECDH_anon_WITH_RC4_128_SHA",
"TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDH_anon_WITH_AES_128_CBC_SHA",
"TLS_ECDH_anon_WITH_AES_256_CBC_SHA",
"TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA",
"TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA",
"TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA",
"TLS_SRP_SHA_WITH_AES_128_CBC_SHA",
"TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA",
"TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA",
"TLS_SRP_SHA_WITH_AES_256_CBC_SHA",
"TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA",
"TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA",
"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256",
"TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384",
"TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256",
"TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384",
"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256",
"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384",
"TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256",
"TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384",
"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
"TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384",
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
"TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384",
"TLS_ECDHE_PSK_WITH_RC4_128_SHA",
"TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA",
"TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA",
"TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA",
"TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256",
"TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384",
"TLS_ECDHE_PSK_WITH_NULL_SHA",
"TLS_ECDHE_PSK_WITH_NULL_SHA256",
"TLS_ECDHE_PSK_WITH_NULL_SHA384");
ENUM_NEXT(tls_cipher_suite_names, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
TLS_ECDHE_PSK_WITH_NULL_SHA384,
"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256",
"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
"TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256");
ENUM_END(tls_cipher_suite_names, TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256);
ENUM(tls_hash_algorithm_names, TLS_HASH_NONE, TLS_HASH_SHA512,
"NONE",
"MD5",
"SHA1",
"SHA224",
"SHA256",
"SHA384",
"SHA512",
);
ENUM_BEGIN(tls_signature_scheme_names,
TLS_SIG_RSA_PKCS1_SHA1, TLS_SIG_RSA_PKCS1_SHA1,
"RSA_PKCS1_SHA1");
ENUM_NEXT(tls_signature_scheme_names,
TLS_SIG_ECDSA_SHA1, TLS_SIG_ECDSA_SHA1, TLS_SIG_RSA_PKCS1_SHA1,
"ECDSA_SHA1");
ENUM_NEXT(tls_signature_scheme_names,
TLS_SIG_RSA_PKCS1_SHA224, TLS_SIG_ECDSA_SHA224, TLS_SIG_ECDSA_SHA1,
"RSA_PKCS1_SHA224",
"DSA_SHA224",
"ECDSA_SHA224");
ENUM_NEXT(tls_signature_scheme_names,
TLS_SIG_RSA_PKCS1_SHA256, TLS_SIG_ECDSA_SHA256, TLS_SIG_ECDSA_SHA224,
"RSA_PKCS1_SHA256",
"DSA_SHA256",
"ECDSA_SHA256");
ENUM_NEXT(tls_signature_scheme_names,
TLS_SIG_RSA_PKCS1_SHA384, TLS_SIG_ECDSA_SHA384, TLS_SIG_ECDSA_SHA256,
"RSA_PKCS1_SHA384",
"DSA_SHA384",
"ECDSA_SHA384");
ENUM_NEXT(tls_signature_scheme_names,
TLS_SIG_RSA_PKCS1_SHA512, TLS_SIG_ECDSA_SHA512, TLS_SIG_ECDSA_SHA384,
"RSA_PKCS1_SHA512",
"DSA_SHA512",
"ECDSA_SHA512");
ENUM_NEXT(tls_signature_scheme_names,
TLS_SIG_RSA_PSS_RSAE_SHA256, TLS_SIG_RSA_PSS_PSS_SHA512, TLS_SIG_ECDSA_SHA512,
"RSA_PSS_RSAE_SHA256",
"RSA_PSS_RSAE_SHA384",
"RSA_PSS_RSAE_SHA512",
"ED25519",
"ED448",
"RSA_PSS_PSS_SHA256",
"RSA_PSS_PSS_SHA384",
"RSA_PSS_PSS_SHA512",
);
ENUM_END(tls_signature_scheme_names, TLS_SIG_RSA_PSS_PSS_SHA512);
ENUM_BEGIN(tls_client_certificate_type_names,
TLS_RSA_SIGN, TLS_DSS_EPHEMERAL_DH,
"RSA_SIGN",
"DSA_SIGN",
"RSA_FIXED_DH",
"DSS_FIXED_DH",
"RSA_EPHEMERAL_DH",
"DSS_EPHEMERAL_DH");
ENUM_NEXT(tls_client_certificate_type_names,
TLS_FORTEZZA_DMS, TLS_FORTEZZA_DMS, TLS_DSS_EPHEMERAL_DH,
"FORTEZZA_DMS");
ENUM_NEXT(tls_client_certificate_type_names,
TLS_ECDSA_SIGN, TLS_ECDSA_FIXED_ECDH, TLS_FORTEZZA_DMS,
"ECDSA_SIGN",
"RSA_FIXED_ECDH",
"ECDSA_FIXED_ECDH");
ENUM_END(tls_client_certificate_type_names, TLS_ECDSA_FIXED_ECDH);
ENUM(tls_ecc_curve_type_names, TLS_ECC_EXPLICIT_PRIME, TLS_ECC_NAMED_CURVE,
"EXPLICIT_PRIME",
"EXPLICIT_CHAR2",
"NAMED_CURVE",
);
ENUM_BEGIN(tls_named_group_names, TLS_SECT163K1, TLS_SECP521R1,
"SECT163K1",
"SECT163R1",
"SECT163R2",
"SECT193R1",
"SECT193R2",
"SECT233K1",
"SECT233R1",
"SECT239K1",
"SECT283K1",
"SECT283R1",
"SECT409K1",
"SECT409R1",
"SECT571K1",
"SECT571R1",
"SECP160K1",
"SECP160R1",
"SECP160R2",
"SECP192K1",
"SECP192R1",
"SECP224K1",
"SECP224R1",
"SECP256K1",
"SECP256R1",
"SECP384R1",
"SECP521R1",
);
ENUM_NEXT(tls_named_group_names, TLS_CURVE25519, TLS_CURVE448, TLS_SECP521R1,
"CURVE25519",
"CURVE448",
);
ENUM_NEXT(tls_named_group_names, TLS_FFDHE2048, TLS_FFDHE8192, TLS_CURVE448,
"FFDHE2048",
"FFDHE3072",
"FFDHE4096",
"FFDHE6144",
"FFDHE8192",
);
ENUM_END(tls_named_group_names, TLS_FFDHE8192);
ENUM(tls_ansi_point_format_names, TLS_ANSI_COMPRESSED, TLS_ANSI_HYBRID_Y,
"compressed",
"compressed y",
"uncompressed",
"uncompressed y",
"hybrid",
"hybrid y",
);
ENUM(tls_ec_point_format_names,
TLS_EC_POINT_UNCOMPRESSED, TLS_EC_POINT_ANSIX962_COMPRESSED_CHAR2,
"uncompressed",
"ansiX962 compressed prime",
"ansiX962 compressed char2",
);
typedef struct private_tls_crypto_t private_tls_crypto_t;
/**
* Private data of an tls_crypto_t object.
*/
struct private_tls_crypto_t {
/**
* Public tls_crypto_t interface.
*/
tls_crypto_t public;
/**
* Protection layer
*/
tls_protection_t *protection;
/**
* List of supported/acceptable cipher suites
*/
tls_cipher_suite_t *suites;
/**
* Number of supported suites
*/
int suite_count;
/**
* HKDF for TLS 1.3
*/
tls_hkdf_t *hkdf;
/**
* Selected cipher suite
*/
tls_cipher_suite_t suite;
/**
* RSA supported?
*/
bool rsa;
/**
* ECDSA supported?
*/
bool ecdsa;
/**
* TLS context
*/
tls_t *tls;
/**
* TLS session cache
*/
tls_cache_t *cache;
/**
* All handshake data concatenated
*/
chunk_t handshake;
/**
* Connection state TLS PRF
*/
tls_prf_t *prf;
/**
* AEAD transform for inbound traffic
*/
tls_aead_t *aead_in;
/**
* AEAD transform for outbound traffic
*/
tls_aead_t *aead_out;
/**
* EAP-[T]TLS MSK
*/
chunk_t msk;
/**
* ASCII string constant used as seed for EAP-[T]TLS MSK PRF
*/
char *msk_label;
};
typedef struct {
tls_cipher_suite_t suite;
key_type_t key;
diffie_hellman_group_t dh;
hash_algorithm_t hash;
pseudo_random_function_t prf;
integrity_algorithm_t mac;
encryption_algorithm_t encr;
size_t encr_size;
tls_version_t min_version;
tls_version_t max_version;
} suite_algs_t;
/**
* Mapping suites to a set of algorithms
*
* The order represents the descending preference of cipher suites and follows
* this rule set:
*
* 1. TLS 1.3 > Legacy TLS
* 2. AES > CAMELLIA > NULL
* 3. AES256 > AES128
* 4. GCM > CBC
* 5. ECDHE > DHE > NULL
* 6. ECDSA > RSA
* 7. SHA384 > SHA256 > SHA1
*
*/
static suite_algs_t suite_algs[] = {
/* Cipher suites of TLS 1.3: key exchange and authentication
* delegated to extensions, therefore KEY_ANY, MODP_NONE, PRF_UNDEFINED */
{ TLS_AES_256_GCM_SHA384,
KEY_ANY, MODP_NONE,
HASH_SHA384, PRF_UNDEFINED,
AUTH_HMAC_SHA2_384_384, ENCR_AES_GCM_ICV16, 32,
TLS_1_3, TLS_1_3,
},
{ TLS_AES_128_GCM_SHA256,
KEY_ANY, MODP_NONE,
HASH_SHA256, PRF_UNDEFINED,
AUTH_HMAC_SHA2_256_256, ENCR_AES_GCM_ICV16, 16,
TLS_1_3, TLS_1_3,
},
{ TLS_CHACHA20_POLY1305_SHA256,
KEY_ANY, MODP_NONE,
HASH_SHA256, PRF_UNDEFINED,
AUTH_HMAC_SHA2_256_256, ENCR_CHACHA20_POLY1305, 32,
TLS_1_3, TLS_1_3,
},
{ TLS_AES_128_CCM_SHA256,
KEY_ANY, MODP_NONE,
HASH_SHA256, PRF_UNDEFINED,
AUTH_HMAC_SHA2_256_256, ENCR_AES_CCM_ICV16, 16,
TLS_1_3, TLS_1_3,
},
{ TLS_AES_128_CCM_8_SHA256,
KEY_ANY, MODP_NONE,
HASH_SHA256, PRF_UNDEFINED,
AUTH_HMAC_SHA2_256_256, ENCR_AES_CCM_ICV8, 16,
TLS_1_3, TLS_1_3,
},
/* Legacy TLS cipher suites */
{ TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
KEY_ECDSA, ECP_384_BIT,
HASH_SHA384, PRF_HMAC_SHA2_384,
AUTH_UNDEFINED, ENCR_AES_GCM_ICV16, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
KEY_ECDSA, ECP_384_BIT,
HASH_SHA384, PRF_HMAC_SHA2_384,
AUTH_HMAC_SHA2_384_384, ENCR_AES_CBC, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
KEY_ECDSA, ECP_384_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 32,
TLS_1_0, TLS_1_2,
},
{ TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
KEY_ECDSA, ECP_256_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_UNDEFINED, ENCR_AES_GCM_ICV16, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
KEY_ECDSA, ECP_256_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_AES_CBC, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
KEY_ECDSA, ECP_256_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 16,
TLS_1_0, TLS_1_2,
},
{ TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
KEY_RSA, ECP_384_BIT,
HASH_SHA384, PRF_HMAC_SHA2_384,
AUTH_UNDEFINED, ENCR_AES_GCM_ICV16, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
KEY_RSA, ECP_384_BIT,
HASH_SHA384, PRF_HMAC_SHA2_384,
AUTH_HMAC_SHA2_384_384, ENCR_AES_CBC, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
KEY_RSA, ECP_384_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 32,
TLS_1_0, TLS_1_2,
},
{ TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
KEY_RSA, ECP_256_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_UNDEFINED, ENCR_AES_GCM_ICV16, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
KEY_RSA, ECP_256_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_AES_CBC, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
KEY_RSA, ECP_256_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 16,
TLS_1_0, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
KEY_RSA, MODP_4096_BIT,
HASH_SHA384, PRF_HMAC_SHA2_384,
AUTH_UNDEFINED, ENCR_AES_GCM_ICV16, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
KEY_RSA, MODP_4096_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_AES_CBC, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
KEY_RSA, MODP_3072_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 32,
SSL_3_0, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256,
KEY_RSA, MODP_4096_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_CAMELLIA_CBC, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA,
KEY_RSA, MODP_3072_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_CAMELLIA_CBC, 32,
SSL_3_0, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
KEY_RSA, MODP_3072_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_UNDEFINED, ENCR_AES_GCM_ICV16, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
KEY_RSA, MODP_3072_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_AES_CBC, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
KEY_RSA, MODP_2048_BIT,
HASH_SHA256,PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 16,
SSL_3_0, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256,
KEY_RSA, MODP_3072_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_CAMELLIA_CBC, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA,
KEY_RSA, MODP_2048_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_CAMELLIA_CBC, 16,
SSL_3_0, TLS_1_2,
},
{ TLS_RSA_WITH_AES_256_GCM_SHA384,
KEY_RSA, MODP_NONE,
HASH_SHA384, PRF_HMAC_SHA2_384,
AUTH_UNDEFINED, ENCR_AES_GCM_ICV16, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_RSA_WITH_AES_256_CBC_SHA256,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_AES_CBC, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_RSA_WITH_AES_256_CBC_SHA,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 32,
SSL_3_0, TLS_1_2,
},
{ TLS_RSA_WITH_AES_128_GCM_SHA256,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_UNDEFINED, ENCR_AES_GCM_ICV16, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_RSA_WITH_AES_128_CBC_SHA256,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_AES_CBC, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_RSA_WITH_AES_128_CBC_SHA,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 16,
SSL_3_0, TLS_1_2,
},
{ TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_CAMELLIA_CBC, 32,
TLS_1_2, TLS_1_2,
},
{ TLS_RSA_WITH_CAMELLIA_256_CBC_SHA,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_CAMELLIA_CBC, 32,
SSL_3_0, TLS_1_2,
},
{ TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_CAMELLIA_CBC, 16,
TLS_1_2, TLS_1_2,
},
{ TLS_RSA_WITH_CAMELLIA_128_CBC_SHA,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_CAMELLIA_CBC, 16,
SSL_3_0, TLS_1_2,
},
{ TLS_ECDHE_ECDSA_WITH_NULL_SHA,
KEY_ECDSA, ECP_256_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_NULL, 0,
TLS_1_0, TLS_1_2,
},
{ TLS_ECDHE_RSA_WITH_NULL_SHA,
KEY_ECDSA, ECP_256_BIT,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_NULL, 0,
TLS_1_0, TLS_1_2,
},
{ TLS_RSA_WITH_NULL_SHA256,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA2_256_256, ENCR_NULL, 0,
TLS_1_2, TLS_1_2,
},
{ TLS_RSA_WITH_NULL_SHA,
KEY_RSA, MODP_NONE,
HASH_SHA256, PRF_HMAC_SHA2_256,
AUTH_HMAC_SHA1_160, ENCR_NULL, 0,
SSL_3_0, TLS_1_2,
},
};
/**
* Look up algorithms by a suite
*/
static suite_algs_t *find_suite(tls_cipher_suite_t suite)
{
int i;
for (i = 0; i < countof(suite_algs); i++)
{
if (suite_algs[i].suite == suite)
{
return &suite_algs[i];
}
}
return NULL;
}
/**
* Filter a suite list using a transform enumerator
*/
static void filter_suite(suite_algs_t suites[], int *count, int offset,
enumerator_t*(*create_enumerator)(crypto_factory_t*))
{
const char *plugin_name;
suite_algs_t current;
int *current_alg, i, remaining = 0;
enumerator_t *enumerator;
memset(¤t, 0, sizeof(current));
current_alg = (int*)((char*)¤t + offset);
for (i = 0; i < *count; i++)
{
if (create_enumerator == lib->crypto->create_crypter_enumerator &&
encryption_algorithm_is_aead(suites[i].encr))
{ /* filtering crypters, but current suite uses an AEAD, apply */
suites[remaining] = suites[i];
remaining++;
continue;
}
if (create_enumerator == lib->crypto->create_aead_enumerator &&
!encryption_algorithm_is_aead(suites[i].encr))
{ /* filtering AEADs, but current suite doesn't use one, apply */
suites[remaining] = suites[i];
remaining++;
continue;
}
enumerator = create_enumerator(lib->crypto);
while (enumerator->enumerate(enumerator, current_alg, &plugin_name))
{
if (current.encr && current.encr != suites[i].encr)
{
if (suites[i].encr != ENCR_NULL)
{ /* skip, ENCR does not match nor is NULL */
continue;
}
}
if (current.mac && current.mac != suites[i].mac)
{
if (suites[i].mac != AUTH_UNDEFINED)
{ /* skip, MAC does not match nor is it undefined */
continue;
}
}
if (current.prf && current.prf != suites[i].prf)
{
if (suites[i].prf != PRF_UNDEFINED)
{
/* skip, PRF does not match nor is it undefined */
continue;
}
}
if (current.hash && current.hash != suites[i].hash)
{ /* skip, hash does not match */
continue;
}
if (current.dh && current.dh != suites[i].dh)
{
if (suites[i].dh != MODP_NONE &&
!(diffie_hellman_group_is_ec(current.dh) &&
diffie_hellman_group_is_ec(suites[i].dh)))
{ /* skip DH group, does not match nor NONE nor both ECDH */
continue;
}
}
/* suite supported, apply */
suites[remaining] = suites[i];
remaining++;
break;
}
enumerator->destroy(enumerator);
}
*count = remaining;
}
/**
* Purge NULL encryption cipher suites from list
*/
static void filter_null_suites(suite_algs_t suites[], int *count)
{
int i, remaining = 0;
for (i = 0; i < *count; i++)
{
if (suites[i].encr != ENCR_NULL)
{
suites[remaining] = suites[i];
remaining++;
}
}
*count = remaining;
}
/**
* Purge suites using a given key type
*/
static void filter_key_suites(private_tls_crypto_t *this,
suite_algs_t suites[], int *count, key_type_t key)
{
int i, remaining = 0;
DBG2(DBG_TLS, "disabling %N suites, no backend found", key_type_names, key);
for (i = 0; i < *count; i++)
{
if (suites[i].key != key)
{
suites[remaining] = suites[i];
remaining++;
}
}
*count = remaining;
}
/**
* Filter suites by key exchange user config
*/
static void filter_key_exchange_config_suites(private_tls_crypto_t *this,
suite_algs_t suites[], int *count)
{
enumerator_t *enumerator;
int i, remaining = 0;
char *token, *config;
config = lib->settings->get_str(lib->settings, "%s.tls.key_exchange", NULL,
lib->ns);
if (config)
{
for (i = 0; i < *count; i++)
{
enumerator = enumerator_create_token(config, ",", " ");
while (enumerator->enumerate(enumerator, &token))
{
if (strcaseeq(token, "ecdhe-ecdsa") &&
diffie_hellman_group_is_ec(suites[i].dh) &&
suites[i].key == KEY_ECDSA)
{
suites[remaining++] = suites[i];
break;
}
if (strcaseeq(token, "ecdhe-rsa") &&
diffie_hellman_group_is_ec(suites[i].dh) &&
suites[i].key == KEY_RSA)
{
suites[remaining++] = suites[i];
break;
}
if (strcaseeq(token, "dhe-rsa") &&
!diffie_hellman_group_is_ec(suites[i].dh) &&
suites[i].dh != MODP_NONE &&
suites[i].key == KEY_RSA)
{
suites[remaining++] = suites[i];
break;
}
if (strcaseeq(token, "rsa") &&
suites[i].dh == MODP_NONE &&
suites[i].key == KEY_RSA)
{
suites[remaining++] = suites[i];
break;
}
}
enumerator->destroy(enumerator);
}
*count = remaining;
}
}
/**
* Filter suites by cipher user config
*/
static void filter_cipher_config_suites(private_tls_crypto_t *this,
suite_algs_t suites[], int *count)
{
enumerator_t *enumerator;
int i, remaining = 0;
char *token, *config;
config = lib->settings->get_str(lib->settings, "%s.tls.cipher", NULL,
lib->ns);
if (config)
{
for (i = 0; i < *count; i++)
{
enumerator = enumerator_create_token(config, ",", " ");
while (enumerator->enumerate(enumerator, &token))
{
const proposal_token_t *tok;
tok = lib->proposal->get_token(lib->proposal, token);
if (tok != NULL && tok->type == ENCRYPTION_ALGORITHM &&
suites[i].encr == tok->algorithm &&
(!tok->keysize || suites[i].encr_size == tok->keysize / 8))
{
suites[remaining++] = suites[i];
break;
}
}
enumerator->destroy(enumerator);
}
*count = remaining;
}
}
/**
* Filter suites by mac user config
*/
static void filter_mac_config_suites(private_tls_crypto_t *this,
suite_algs_t suites[], int *count)
{
enumerator_t *enumerator;
int i, remaining = 0;
char *token, *config;
config = lib->settings->get_str(lib->settings, "%s.tls.mac", NULL,
lib->ns);
if (config)
{
for (i = 0; i < *count; i++)
{
enumerator = enumerator_create_token(config, ",", " ");
while (enumerator->enumerate(enumerator, &token))
{
if (strcaseeq(token, "sha1") &&
suites[i].mac == AUTH_HMAC_SHA1_160)
{
suites[remaining++] = suites[i];
break;
}
if (strcaseeq(token, "sha256") &&
suites[i].mac == AUTH_HMAC_SHA2_256_256)
{
suites[remaining++] = suites[i];
break;
}
if (strcaseeq(token, "sha384") &&
suites[i].mac == AUTH_HMAC_SHA2_384_384)
{
suites[remaining++] = suites[i];
break;
}
}
enumerator->destroy(enumerator);
}
*count = remaining;
}
}
/**
* Filter for specific suites specified in strongswan.conf
*/
static void filter_specific_config_suites(private_tls_crypto_t *this,
suite_algs_t suites[], int *count)
{
enumerator_t *enumerator;
int i, remaining = 0, suite;
char *token, *config;
config = lib->settings->get_str(lib->settings, "%s.tls.suites", NULL,
lib->ns);
if (config)
{
for (i = 0; i < *count; i++)
{
enumerator = enumerator_create_token(config, ",", " ");
while (enumerator->enumerate(enumerator, &token))
{
if (enum_from_name(tls_cipher_suite_names, token, &suite) &&
suite == suites[i].suite)
{
suites[remaining++] = suites[i];
break;
}
}
enumerator->destroy(enumerator);
}
*count = remaining;
}
}
/**
* Filter key exchange curves by curve user config
*/
static bool filter_curve_config(tls_named_group_t curve)
{
enumerator_t *enumerator;
char *token, *config;
config = lib->settings->get_str(lib->settings, "%s.tls.ke_group", NULL,
lib->ns);
if (config)
{
enumerator = enumerator_create_token(config, ",", " ");
while (enumerator->enumerate(enumerator, &token))
{
const proposal_token_t *tok;
tok = lib->proposal->get_token(lib->proposal, token);
if (tok != NULL && tok->type == DIFFIE_HELLMAN_GROUP &&
curve == tls_ec_group_to_curve(tok->algorithm))
{
enumerator->destroy(enumerator);
return TRUE;
}
}
enumerator->destroy(enumerator);
}
return !config;
}
/**
* Filter out unsupported suites on given suite array
*/
static void filter_unsupported_suites(suite_algs_t suites[], int *count)
{
/* filter suite list by each algorithm */
filter_suite(suites, count, offsetof(suite_algs_t, encr),
lib->crypto->create_aead_enumerator);
filter_suite(suites, count, offsetof(suite_algs_t, prf),
lib->crypto->create_prf_enumerator);
filter_suite(suites, count, offsetof(suite_algs_t, encr),
lib->crypto->create_crypter_enumerator);
filter_suite(suites, count, offsetof(suite_algs_t, mac),
lib->crypto->create_signer_enumerator);
filter_suite(suites, count, offsetof(suite_algs_t, hash),
lib->crypto->create_hasher_enumerator);
filter_suite(suites, count, offsetof(suite_algs_t, dh),
lib->crypto->create_dh_enumerator);
}
/**
* Initialize the cipher suite list
*/
static void build_cipher_suite_list(private_tls_crypto_t *this)
{
suite_algs_t suites[countof(suite_algs)];
tls_version_t min_version, max_version, new_min_version, new_max_version;
bool require_encryption = TRUE;
int count = 0, i;
switch (this->tls->get_purpose(this->tls))
{
case TLS_PURPOSE_EAP_TLS:
require_encryption = FALSE;
break;
case TLS_PURPOSE_GENERIC:
if (this->tls->get_flags(this->tls) & TLS_FLAG_ENCRYPTION_OPTIONAL)
{
require_encryption = FALSE;
}
break;
default:
break;
}
min_version = this->tls->get_version_min(this->tls);
max_version = this->tls->get_version_max(this->tls);
/* copy all suites appropriate for the current min/max versions */
for (i = 0; i < countof(suite_algs); i++)
{
if (suite_algs[i].min_version <= max_version &&
suite_algs[i].max_version >= min_version)
{
suites[count++] = suite_algs[i];
}
}
if (require_encryption)
{
filter_null_suites(suites, &count);
}
if (!this->rsa)
{
filter_key_suites(this, suites, &count, KEY_RSA);
}
if (!this->ecdsa)
{
filter_key_suites(this, suites, &count, KEY_ECDSA);
}
filter_unsupported_suites(suites, &count);
/* filter suites with strongswan.conf options */
filter_key_exchange_config_suites(this, suites, &count);
filter_cipher_config_suites(this, suites, &count);
filter_mac_config_suites(this, suites, &count);
filter_specific_config_suites(this, suites, &count);
free(this->suites);
this->suite_count = count;
this->suites = malloc(sizeof(tls_cipher_suite_t) * count);
DBG2(DBG_TLS, "%d supported TLS cipher suites:", count);
new_min_version = max_version;
new_max_version = min_version;
for (i = 0; i < count; i++)
{
DBG2(DBG_TLS, " %N", tls_cipher_suite_names, suites[i].suite);
this->suites[i] = suites[i].suite;
/* set TLS min/max versions appropriate to the final cipher suites */
new_max_version = max(new_max_version, suites[i].max_version);
new_min_version = min(new_min_version, suites[i].min_version);
}
new_max_version = min(new_max_version, max_version);
new_min_version = max(new_min_version, min_version);
if ((min_version != new_min_version || max_version != new_max_version) &&
this->tls->set_version(this->tls, new_min_version, new_max_version))
{
DBG2(DBG_TLS, "TLS min/max %N/%N according to the cipher suites",
tls_numeric_version_names, new_min_version,
tls_numeric_version_names, new_max_version);
}
}
METHOD(tls_crypto_t, get_cipher_suites, int,
private_tls_crypto_t *this, tls_cipher_suite_t **suites)
{
if (!this->suites)
{
build_cipher_suite_list(this);
}
if (suites)
{
*suites = this->suites;
}
return this->suite_count;
}
/**
* Create NULL encryption transforms
*/
static bool create_null(private_tls_crypto_t *this, suite_algs_t *algs)
{
this->aead_in = tls_aead_create_null(algs->mac);
this->aead_out = tls_aead_create_null(algs->mac);
if (!this->aead_in || !this->aead_out)
{
DBG1(DBG_TLS, "selected TLS MAC %N not supported",
integrity_algorithm_names, algs->mac);
return FALSE;
}
return TRUE;
}
/**
* Create traditional transforms
*/
static bool create_traditional(private_tls_crypto_t *this, suite_algs_t *algs)
{
if (this->tls->get_version_max(this->tls) < TLS_1_1)
{
this->aead_in = tls_aead_create_implicit(algs->mac,
algs->encr, algs->encr_size);
this->aead_out = tls_aead_create_implicit(algs->mac,
algs->encr, algs->encr_size);
}
else
{
this->aead_in = tls_aead_create_explicit(algs->mac,
algs->encr, algs->encr_size);
this->aead_out = tls_aead_create_explicit(algs->mac,
algs->encr, algs->encr_size);
}
if (!this->aead_in || !this->aead_out)
{
DBG1(DBG_TLS, "selected TLS transforms %N-%u-%N not supported",
encryption_algorithm_names, algs->encr, algs->encr_size * 8,
integrity_algorithm_names, algs->mac);
return FALSE;
}
return TRUE;
}
/**
* Create AEAD transforms
*/
static bool create_aead(private_tls_crypto_t *this, suite_algs_t *algs)
{
if (this->tls->get_version_max(this->tls) < TLS_1_3)
{
this->aead_in = tls_aead_create_aead(algs->encr, algs->encr_size);
this->aead_out = tls_aead_create_aead(algs->encr, algs->encr_size);
}
else
{
this->aead_in = tls_aead_create_seq(algs->encr, algs->encr_size);
this->aead_out = tls_aead_create_seq(algs->encr, algs->encr_size);
}
if (!this->aead_in || !this->aead_out)
{
DBG1(DBG_TLS, "selected TLS transforms %N-%u not supported",
encryption_algorithm_names, algs->encr, algs->encr_size * 8);
return FALSE;
}
return TRUE;
}
/**
* Clean up and unset AEAD transforms
*/
static void destroy_aeads(private_tls_crypto_t *this)
{
DESTROY_IF(this->aead_in);
DESTROY_IF(this->aead_out);
this->aead_in = this->aead_out = NULL;
}
/**
* Create crypto primitives
*/
static bool create_ciphers(private_tls_crypto_t *this, suite_algs_t *algs)
{
destroy_aeads(this);
DESTROY_IF(this->hkdf);
DESTROY_IF(this->prf);
if (this->tls->get_version_max(this->tls) < TLS_1_3)
{
if (this->tls->get_version_max(this->tls) < TLS_1_2)
{
this->prf = tls_prf_create_10();
}
else
{
this->prf = tls_prf_create_12(algs->prf);
}
if (!this->prf)
{
DBG1(DBG_TLS, "selected TLS PRF not supported");
return FALSE;
}
}
else
{
this->hkdf = tls_hkdf_create(algs->hash, chunk_empty);
if (!this->hkdf)
{
DBG1(DBG_TLS, "TLS HKDF creation unsuccessful");
return FALSE;
}
}
if (algs->encr == ENCR_NULL)
{
if (create_null(this, algs))
{
return TRUE;
}
}
else if (encryption_algorithm_is_aead(algs->encr))
{
if (create_aead(this, algs))
{
return TRUE;
}
}
else
{
if (create_traditional(this, algs))
{
return TRUE;
}
}
destroy_aeads(this);
return FALSE;
}
METHOD(tls_crypto_t, select_cipher_suite, tls_cipher_suite_t,
private_tls_crypto_t *this, tls_cipher_suite_t *suites, int count,
key_type_t key)
{
suite_algs_t *algs;
int i, j;
for (i = 0; i < this->suite_count; i++)
{
for (j = 0; j < count; j++)
{
if (this->suites[i] == suites[j])
{
algs = find_suite(this->suites[i]);
if (algs)
{
if (key == KEY_ANY || key == algs->key ||
(algs->key == KEY_ECDSA && key == KEY_ED25519) ||
(algs->key == KEY_ECDSA && key == KEY_ED448))
{
if (create_ciphers(this, algs))
{
this->suite = this->suites[i];
return this->suite;
}
}
}
}
}
}
return 0;
}
/**
* Parameters for RSA/PSS signature schemes
*/
#define PSS_PARAMS(bits) static rsa_pss_params_t pss_params_sha##bits = { \
.hash = HASH_SHA##bits, \
.mgf1_hash = HASH_SHA##bits, \
.salt_len = HASH_SIZE_SHA##bits, \
}
PSS_PARAMS(256);
PSS_PARAMS(384);
PSS_PARAMS(512);
typedef struct {
tls_signature_scheme_t sig;
signature_params_t params;
/* min/max versions for use in CertificateVerify */
tls_version_t min_version;
tls_version_t max_version;
} scheme_algs_t;
/**
* Map TLS signature schemes, ordered by preference
*/
static scheme_algs_t schemes[] = {
{ TLS_SIG_ECDSA_SHA256, { .scheme = SIGN_ECDSA_WITH_SHA256_DER },
TLS_1_0, TLS_1_3 },
{ TLS_SIG_ECDSA_SHA384, { .scheme = SIGN_ECDSA_WITH_SHA384_DER },
TLS_1_0, TLS_1_3 },
{ TLS_SIG_ECDSA_SHA512, { .scheme = SIGN_ECDSA_WITH_SHA512_DER },
TLS_1_0, TLS_1_3 },
{ TLS_SIG_ED25519, { .scheme = SIGN_ED25519 },
TLS_1_0, TLS_1_3 },
{ TLS_SIG_ED448, { .scheme = SIGN_ED448 },
TLS_1_0, TLS_1_3 },
{ TLS_SIG_RSA_PSS_RSAE_SHA256, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha256, },
TLS_1_2, TLS_1_3 },
{ TLS_SIG_RSA_PSS_RSAE_SHA384, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha384, },
TLS_1_2, TLS_1_3 },
{ TLS_SIG_RSA_PSS_RSAE_SHA512, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha512, },
TLS_1_2, TLS_1_3 },
/* the parameters for the next three should actually be taken from the
* public key, we currently don't have an API for that, so assume defaults */
{ TLS_SIG_RSA_PSS_PSS_SHA256, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha256, },
TLS_1_2, TLS_1_3 },
{ TLS_SIG_RSA_PSS_PSS_SHA384, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha384, },
TLS_1_2, TLS_1_3 },
{ TLS_SIG_RSA_PSS_PSS_SHA512, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha512, },
TLS_1_2, TLS_1_3 },
{ TLS_SIG_RSA_PKCS1_SHA256, { .scheme = SIGN_RSA_EMSA_PKCS1_SHA2_256 },
TLS_1_0, TLS_1_2 },
{ TLS_SIG_RSA_PKCS1_SHA384, { .scheme = SIGN_RSA_EMSA_PKCS1_SHA2_384 },
TLS_1_0, TLS_1_2 },
{ TLS_SIG_RSA_PKCS1_SHA512, { .scheme = SIGN_RSA_EMSA_PKCS1_SHA2_512 },
TLS_1_0, TLS_1_2 },
};
/**
* Filter signature scheme config
*/
static bool filter_signature_scheme_config(tls_signature_scheme_t signature)
{
enumerator_t *enumerator;
char *token, *config;
config = lib->settings->get_str(lib->settings, "%s.tls.signature", NULL,
lib->ns);
if (config)
{
enumerator = enumerator_create_token(config, ",", " ");
while (enumerator->enumerate(enumerator, &token))
{
tls_signature_scheme_t sig;
if (enum_from_name(tls_signature_scheme_names, token, &sig) &&
sig == signature)
{
enumerator->destroy(enumerator);
return TRUE;
}
}
enumerator->destroy(enumerator);
}
return !config;
}
METHOD(tls_crypto_t, get_signature_algorithms, void,
private_tls_crypto_t *this, bio_writer_t *writer, bool cert)
{
bio_writer_t *supported;
tls_version_t min_version, max_version;
int i;
supported = bio_writer_create(32);
if (!cert)
{
min_version = this->tls->get_version_min(this->tls);
max_version = this->tls->get_version_max(this->tls);
}
for (i = 0; i < countof(schemes); i++)
{
if ((cert || (schemes[i].min_version <= max_version &&
schemes[i].max_version >= min_version)) &&
lib->plugins->has_feature(lib->plugins,
PLUGIN_PROVIDE(PUBKEY_VERIFY, schemes[i].params.scheme)) &&
filter_signature_scheme_config(schemes[i].sig))
{
supported->write_uint16(supported, schemes[i].sig);
}
}
writer->write_data16(writer, supported->get_buf(supported));
supported->destroy(supported);
}
/**
* Get the signature parameters from a TLS signature scheme
*/
static signature_params_t *params_for_scheme(tls_signature_scheme_t sig,
bool sign)
{
int i;
for (i = 0; i < countof(schemes); i++)
{
/* strongSwan supports only RSA_PSS_RSAE schemes for signing but can
* verify public keys in rsaEncryption as well as rsassaPss encoding. */
if (sign && (sig == TLS_SIG_RSA_PSS_PSS_SHA256 ||
sig == TLS_SIG_RSA_PSS_PSS_SHA384 ||
sig == TLS_SIG_RSA_PSS_PSS_SHA512))
{
continue;
}
if (schemes[i].sig == sig)
{
return &schemes[i].params;
}
}
return NULL;
}
/**
* Mapping groups to TLS named curves
*/
static struct {
diffie_hellman_group_t group;
tls_named_group_t curve;
} curves[] = {
{ ECP_256_BIT, TLS_SECP256R1},
{ ECP_384_BIT, TLS_SECP384R1},
{ ECP_521_BIT, TLS_SECP521R1},
{ ECP_224_BIT, TLS_SECP224R1},
{ ECP_192_BIT, TLS_SECP192R1},
{ CURVE_25519, TLS_CURVE25519},
{ CURVE_448, TLS_CURVE448},
};
CALLBACK(group_filter, bool,
void *null, enumerator_t *orig, va_list args)
{
diffie_hellman_group_t group, *group_out;
tls_named_group_t curve, *curve_out;
char *plugin;
VA_ARGS_VGET(args, group_out, curve_out);
while (orig->enumerate(orig, &group, &plugin))
{
curve = tls_ec_group_to_curve(group);
if (curve)
{
if (group_out)
{
*group_out = group;
}
if (curve_out)
{
*curve_out = curve;
}
return TRUE;
}
}
return FALSE;
}
CALLBACK(config_filter, bool,
void *null, enumerator_t *orig, va_list args)
{
diffie_hellman_group_t group, *group_out;
tls_named_group_t curve, *curve_out;
VA_ARGS_VGET(args, group_out, curve_out);
while (orig->enumerate(orig, &group, &curve))
{
if (filter_curve_config(curve))
{
if (group_out)
{
*group_out = group;
}
if (curve_out)
{
*curve_out = curve;
}
return TRUE;
}
}
return FALSE;
}
METHOD(tls_crypto_t, create_ec_enumerator, enumerator_t*,
private_tls_crypto_t *this)
{
return enumerator_create_filter(
enumerator_create_filter(
lib->crypto->create_dh_enumerator(lib->crypto),
group_filter, NULL, NULL),
config_filter, NULL, NULL);
}
/**
* Check if the given ECDH group is supported or return the first one we
* actually do support.
*/
static diffie_hellman_group_t supported_ec_group(private_tls_crypto_t *this,
diffie_hellman_group_t orig)
{
diffie_hellman_group_t current, first = MODP_NONE;
enumerator_t *enumerator;
enumerator = create_ec_enumerator(this);
while (enumerator->enumerate(enumerator, ¤t, NULL))
{
if (current == orig)
{
enumerator->destroy(enumerator);
return orig;
}
else if (first == MODP_NONE)
{
first = current;
}
}
enumerator->destroy(enumerator);
return first;
}
METHOD(tls_crypto_t, get_dh_group, diffie_hellman_group_t,
private_tls_crypto_t *this)
{
suite_algs_t *algs;
algs = find_suite(this->suite);
if (algs)
{
if (diffie_hellman_group_is_ec(algs->dh))
{
return supported_ec_group(this, algs->dh);
}
return algs->dh;
}
return MODP_NONE;
}
METHOD(tls_crypto_t, set_protection, void,
private_tls_crypto_t *this, tls_protection_t *protection)
{
this->protection = protection;
}
METHOD(tls_crypto_t, append_handshake, void,
private_tls_crypto_t *this, tls_handshake_type_t type, chunk_t data)
{
uint32_t header;
/* reconstruct handshake header */
header = htonl(data.len | (type << 24));
this->handshake = chunk_cat("mcc", this->handshake,
chunk_from_thing(header), data);
}
/**
* Create a hash using the suites HASH algorithm
*/
static bool hash_data(private_tls_crypto_t *this, chunk_t data, chunk_t *hash)
{
if (this->tls->get_version_max(this->tls) >= TLS_1_2)
{
hasher_t *hasher;
suite_algs_t *alg;
alg = find_suite(this->suite);
if (!alg)
{
return FALSE;
}
hasher = lib->crypto->create_hasher(lib->crypto, alg->hash);
if (!hasher || !hasher->allocate_hash(hasher, data, hash))
{
DBG1(DBG_TLS, "%N not supported", hash_algorithm_names, alg->hash);
DESTROY_IF(hasher);
return FALSE;
}
hasher->destroy(hasher);
}
else
{
hasher_t *md5, *sha1;
char buf[HASH_SIZE_MD5 + HASH_SIZE_SHA1];
md5 = lib->crypto->create_hasher(lib->crypto, HASH_MD5);
if (!md5 || !md5->get_hash(md5, data, buf))
{
DBG1(DBG_TLS, "%N not supported", hash_algorithm_names, HASH_MD5);
DESTROY_IF(md5);
return FALSE;
}
md5->destroy(md5);
sha1 = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
if (!sha1 || !sha1->get_hash(sha1, data, buf + HASH_SIZE_MD5))
{
DBG1(DBG_TLS, "%N not supported", hash_algorithm_names, HASH_SHA1);
DESTROY_IF(sha1);
return FALSE;
}
sha1->destroy(sha1);
*hash = chunk_clone(chunk_from_thing(buf));
}
return TRUE;
}
METHOD(tls_crypto_t, hash_handshake, bool,
private_tls_crypto_t *this, chunk_t *out)
{
chunk_t hash;
if (!hash_data(this, this->handshake, &hash))
{
return FALSE;
}
chunk_free(&this->handshake);
append_handshake(this, TLS_MESSAGE_HASH, hash);
if (out)
{
*out = hash;
}
else
{
free(hash.ptr);
}
return TRUE;
}
/**
* TLS 1.3 static part of the data the server signs (64 spaces followed by the
* context string "TLS 1.3, server CertificateVerify" and a 0 byte).
*/
static chunk_t tls13_sig_data_server = chunk_from_chars(
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x54, 0x4c, 0x53, 0x20, 0x31, 0x2e, 0x33, 0x2c,
0x20, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20,
0x43, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63,
0x61, 0x74, 0x65, 0x56, 0x65, 0x72, 0x69, 0x66,
0x79, 0x00,
);
/**
* TLS 1.3 static part of the data the peer signs (64 spaces followed by the
* context string "TLS 1.3, client CertificateVerify" and a 0 byte).
*/
static chunk_t tls13_sig_data_client = chunk_from_chars(
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x54, 0x4c, 0x53, 0x20, 0x31, 0x2e, 0x33, 0x2c,
0x20, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x20,
0x43, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63,
0x61, 0x74, 0x65, 0x56, 0x65, 0x72, 0x69, 0x66,
0x79, 0x00,
);
METHOD(tls_crypto_t, sign, bool,
private_tls_crypto_t *this, private_key_t *key, bio_writer_t *writer,
chunk_t data, chunk_t hashsig)
{
if (this->tls->get_version_max(this->tls) >= TLS_1_2)
{
/* fallback to SHA1/RSA and SHA1/ECDSA */
const chunk_t hashsig_def = chunk_from_chars(0x02, 0x01, 0x02, 0x03);
signature_params_t *params;
key_type_t type;
uint16_t scheme;
bio_reader_t *reader;
chunk_t sig;
bool done = FALSE;
if (this->tls->get_version_max(this->tls) >= TLS_1_3)
{
chunk_t transcript_hash;
if (!hash_data(this, data, &transcript_hash))
{
DBG1(DBG_TLS, "unable to create transcript hash");
return FALSE;
}
if (this->tls->is_server(this->tls))
{
data = chunk_cata("cm", tls13_sig_data_server, transcript_hash);
}
else
{
data = chunk_cata("cm", tls13_sig_data_client, transcript_hash);
}
}
if (!hashsig.len)
{ /* fallback if none given */
hashsig = hashsig_def;
}
type = key->get_type(key);
reader = bio_reader_create(hashsig);
while (reader->remaining(reader) >= 2)
{
if (reader->read_uint16(reader, &scheme))
{
params = params_for_scheme(scheme, TRUE);
if (params &&
type == key_type_from_signature_scheme(params->scheme) &&
key->sign(key, params->scheme, params->params, data, &sig))
{
done = TRUE;
break;
}
}
}
reader->destroy(reader);
if (!done)
{
DBG1(DBG_TLS, "none of the proposed hash/sig algorithms supported");
return FALSE;
}
DBG2(DBG_TLS, "created signature with %N", tls_signature_scheme_names,
scheme);
writer->write_uint16(writer, scheme);
writer->write_data16(writer, sig);
free(sig.ptr);
}
else
{
chunk_t sig, hash;
bool done;
switch (key->get_type(key))
{
case KEY_RSA:
if (!hash_data(this, data, &hash))
{
return FALSE;
}
done = key->sign(key, SIGN_RSA_EMSA_PKCS1_NULL, NULL, hash,
&sig);
free(hash.ptr);
if (!done)
{
return FALSE;
}
DBG2(DBG_TLS, "created signature with MD5+SHA1/RSA");
break;
case KEY_ECDSA:
if (!key->sign(key, SIGN_ECDSA_WITH_SHA1_DER, NULL, data, &sig))
{
return FALSE;
}
DBG2(DBG_TLS, "created signature with SHA1/ECDSA");
break;
case KEY_ED25519:
if (!key->sign(key, SIGN_ED25519, NULL, data, &sig))
{
return FALSE;
}
DBG2(DBG_TLS, "created signature with Ed25519");
break;
case KEY_ED448:
if (!key->sign(key, SIGN_ED448, NULL, data, &sig))
{
return FALSE;
}
DBG2(DBG_TLS, "created signature with Ed448");
break;
default:
return FALSE;
}
writer->write_data16(writer, sig);
free(sig.ptr);
}
return TRUE;
}
METHOD(tls_crypto_t, verify, bool,
private_tls_crypto_t *this, public_key_t *key, bio_reader_t *reader,
chunk_t data)
{
if (this->tls->get_version_max(this->tls) >= TLS_1_2)
{
signature_params_t *params;
uint16_t scheme;
chunk_t sig;
if (!reader->read_uint16(reader, &scheme) ||
!reader->read_data16(reader, &sig))
{
DBG1(DBG_TLS, "received invalid signature");
return FALSE;
}
params = params_for_scheme(scheme, FALSE);
if (!params)
{
DBG1(DBG_TLS, "signature algorithms %N not supported",
tls_signature_scheme_names, scheme);
return FALSE;
}
if (this->tls->get_version_max(this->tls) >= TLS_1_3)
{
chunk_t transcript_hash;
if (!hash_data(this, data, &transcript_hash))
{
DBG1(DBG_TLS, "Unable to create transcript hash");
return FALSE;
}
if (this->tls->is_server(this->tls))
{
data = chunk_cata("cm", tls13_sig_data_client, transcript_hash);
}
else
{
data = chunk_cata("cm", tls13_sig_data_server, transcript_hash);
}
}
if (!key->verify(key, params->scheme, params->params, data, sig))
{
DBG1(DBG_TLS, "signature verification with %N failed",
tls_signature_scheme_names, scheme);
return FALSE;
}
DBG2(DBG_TLS, "verified signature with %N",
tls_signature_scheme_names, scheme);
}
else
{
chunk_t sig, hash;
bool done;
if (!reader->read_data16(reader, &sig))
{
DBG1(DBG_TLS, "received invalid signature");
return FALSE;
}
switch (key->get_type(key))
{
case KEY_RSA:
if (!hash_data(this, data, &hash))
{
return FALSE;
}
done = key->verify(key, SIGN_RSA_EMSA_PKCS1_NULL, NULL, hash,
sig);
free(hash.ptr);
if (!done)
{
return FALSE;
}
DBG2(DBG_TLS, "verified signature data with MD5+SHA1/RSA");
break;
case KEY_ECDSA:
if (!key->verify(key, SIGN_ECDSA_WITH_SHA1_DER, NULL, data,
sig))
{
return FALSE;
}
DBG2(DBG_TLS, "verified signature with SHA1/ECDSA");
break;
case KEY_ED25519:
if (!key->verify(key, SIGN_ED25519, NULL, data, sig))
{
return FALSE;
}
DBG2(DBG_TLS, "verified signature with Ed25519");
break;
case KEY_ED448:
if (!key->verify(key, SIGN_ED448, NULL, data, sig))
{
return FALSE;
}
DBG2(DBG_TLS, "verified signature with Ed448");
break;
default:
return FALSE;
}
}
return TRUE;
}
METHOD(tls_crypto_t, sign_handshake, bool,
private_tls_crypto_t *this, private_key_t *key, bio_writer_t *writer,
chunk_t hashsig)
{
return sign(this, key, writer, this->handshake, hashsig);
}
METHOD(tls_crypto_t, verify_handshake, bool,
private_tls_crypto_t *this, public_key_t *key, bio_reader_t *reader)
{
return verify(this, key, reader, this->handshake);
}
METHOD(tls_crypto_t, calculate_finished_legacy, bool,
private_tls_crypto_t *this, char *label, char out[12])
{
chunk_t seed;
if (!this->prf)
{
return FALSE;
}
if (!hash_data(this, this->handshake, &seed))
{
return FALSE;
}
if (!this->prf->get_bytes(this->prf, label, seed, 12, out))
{
free(seed.ptr);
return FALSE;
}
free(seed.ptr);
return TRUE;
}
METHOD(tls_crypto_t, calculate_finished, bool,
private_tls_crypto_t *this, bool server, chunk_t *out)
{
chunk_t finished_key, finished_hash;
if (!this->hkdf)
{
return FALSE;
}
if (!hash_data(this, this->handshake, &finished_hash))
{
DBG1(DBG_TLS, "creating hash of handshake failed");
return FALSE;
}
if (!this->hkdf->derive_finished(this->hkdf, server, &finished_key))
{
DBG1(DBG_TLS, "generating finished key failed");
chunk_clear(&finished_hash);
return FALSE;
}
if (!this->hkdf->allocate_bytes(this->hkdf, finished_key, finished_hash, out))
{
DBG1(DBG_TLS, "generating finished HMAC failed");
chunk_clear(&finished_key);
chunk_clear(&finished_hash);
return FALSE;
}
chunk_clear(&finished_key);
chunk_clear(&finished_hash);
return TRUE;
}
/**
* Derive master secret from premaster, optionally save session
*/
static bool derive_master(private_tls_crypto_t *this, chunk_t premaster,
chunk_t session, identification_t *id,
chunk_t client_random, chunk_t server_random)
{
char master[48];
chunk_t seed;
/* derive master secret */
seed = chunk_cata("cc", client_random, server_random);
if (!this->prf->set_key(this->prf, premaster) ||
!this->prf->get_bytes(this->prf, "master secret", seed,
sizeof(master), master) ||
!this->prf->set_key(this->prf, chunk_from_thing(master)))
{
return FALSE;
}
if (this->cache && session.len)
{
this->cache->create(this->cache, session, id, chunk_from_thing(master),
this->suite);
}
memwipe(master, sizeof(master));
return TRUE;
}
/**
* Expand key material from master secret
*/
static bool expand_keys(private_tls_crypto_t *this,
chunk_t client_random, chunk_t server_random)
{
chunk_t seed, block;
chunk_t cw_mac, cw, cw_iv;
chunk_t sw_mac, sw, sw_iv;
int mklen, eklen, ivlen;
if (!this->aead_in || !this->aead_out)
{
return FALSE;
}
/* derive key block for key expansion */
mklen = this->aead_in->get_mac_key_size(this->aead_in);
eklen = this->aead_in->get_encr_key_size(this->aead_in);
ivlen = this->aead_in->get_iv_size(this->aead_in);
seed = chunk_cata("cc", server_random, client_random);
block = chunk_alloca((mklen + eklen + ivlen) * 2);
if (!this->prf->get_bytes(this->prf, "key expansion", seed,
block.len, block.ptr))
{
return FALSE;
}
/* client/server write signer keys */
cw_mac = chunk_create(block.ptr, mklen);
block = chunk_skip(block, mklen);
sw_mac = chunk_create(block.ptr, mklen);
block = chunk_skip(block, mklen);
/* client/server write encryption keys */
cw = chunk_create(block.ptr, eklen);
block = chunk_skip(block, eklen);
sw = chunk_create(block.ptr, eklen);
block = chunk_skip(block, eklen);
/* client/server write IV; TLS 1.0 implicit IVs or AEAD salt, if any */
cw_iv = chunk_create(block.ptr, ivlen);
block = chunk_skip(block, ivlen);
sw_iv = chunk_create(block.ptr, ivlen);
block = chunk_skip(block, ivlen);
if (this->tls->is_server(this->tls))
{
if (!this->aead_in->set_keys(this->aead_in, cw_mac, cw, cw_iv) ||
!this->aead_out->set_keys(this->aead_out, sw_mac, sw, sw_iv))
{
return FALSE;
}
}
else
{
if (!this->aead_out->set_keys(this->aead_out, cw_mac, cw, cw_iv) ||
!this->aead_in->set_keys(this->aead_in, sw_mac, sw, sw_iv))
{
return FALSE;
}
}
/* EAP-MSK */
if (this->msk_label)
{
seed = chunk_cata("cc", client_random, server_random);
this->msk = chunk_alloc(64);
if (!this->prf->get_bytes(this->prf, this->msk_label, seed,
this->msk.len, this->msk.ptr))
{
return FALSE;
}
}
return TRUE;
}
METHOD(tls_crypto_t, derive_secrets, bool,
private_tls_crypto_t *this, chunk_t premaster, chunk_t session,
identification_t *id, chunk_t client_random, chunk_t server_random)
{
return derive_master(this, premaster, session, id,
client_random, server_random) &&
expand_keys(this, client_random, server_random);
}
/**
* Derive and configure the client/server key/IV on an AEAD using a given label.
*/
static bool derive_labeled_key(private_tls_crypto_t *this, bool server,
tls_hkdf_label_t label, tls_aead_t *aead)
{
chunk_t key = chunk_empty, iv = chunk_empty;
bool success = FALSE;
if (!this->hkdf->generate_secret(this->hkdf, label, this->handshake,
NULL) ||
!this->hkdf->derive_key(this->hkdf, server,
aead->get_encr_key_size(aead), &key) ||
!this->hkdf->derive_iv(this->hkdf, server,
aead->get_iv_size(aead), &iv))
{
DBG1(DBG_TLS, "deriving key material failed");
goto out;
}
if (!aead->set_keys(aead, chunk_empty, key, iv))
{
DBG1(DBG_TLS, "setting AEAD key material failed");
goto out;
}
success = TRUE;
out:
chunk_clear(&key);
chunk_clear(&iv);
return success;
}
/**
* Derive and configure the keys/IVs using the given labels.
*/
static bool derive_labeled_keys(private_tls_crypto_t *this,
tls_hkdf_label_t client_label,
tls_hkdf_label_t server_label)
{
tls_aead_t *aead_c, *aead_s;
suite_algs_t *algs;
algs = find_suite(this->suite);
destroy_aeads(this);
if (!create_aead(this, algs))
{
return FALSE;
}
aead_c = this->aead_out;
aead_s = this->aead_in;
if (this->tls->is_server(this->tls))
{
aead_c = this->aead_in;
aead_s = this->aead_out;
}
return derive_labeled_key(this, FALSE, client_label, aead_c) &&
derive_labeled_key(this, TRUE, server_label, aead_s);
}
METHOD(tls_crypto_t, derive_handshake_keys, bool,
private_tls_crypto_t *this, chunk_t shared_secret)
{
this->hkdf->set_shared_secret(this->hkdf, shared_secret);
return derive_labeled_keys(this, TLS_HKDF_C_HS_TRAFFIC,
TLS_HKDF_S_HS_TRAFFIC);
}
METHOD(tls_crypto_t, derive_app_keys, bool,
private_tls_crypto_t *this)
{
if (!derive_labeled_keys(this, TLS_HKDF_C_AP_TRAFFIC,
TLS_HKDF_S_AP_TRAFFIC))
{
return FALSE;
}
/* EAP-MSK */
if (this->msk_label)
{
/* because the length is encoded when expanding key material, we
* request the same number of bytes as FreeRADIUS (the first 64 for
* the MSK, the next for the EMSK, which we just ignore) */
if (!this->hkdf->export(this->hkdf, this->msk_label, chunk_empty,
this->handshake, 128, &this->msk))
{
return FALSE;
}
this->msk.len = 64;
}
return TRUE;
}
METHOD(tls_crypto_t, update_app_keys, bool,
private_tls_crypto_t *this, bool inbound)
{
suite_algs_t *algs;
tls_hkdf_label_t label = TLS_HKDF_UPD_C_TRAFFIC;
algs = find_suite(this->suite);
destroy_aeads(this);
if (!create_aead(this, algs))
{
return FALSE;
}
if (this->tls->is_server(this->tls) != inbound)
{
label = TLS_HKDF_UPD_S_TRAFFIC;
}
return derive_labeled_key(this, label == TLS_HKDF_UPD_S_TRAFFIC, label,
inbound ? this->aead_in : this->aead_out);
}
METHOD(tls_crypto_t, resume_session, tls_cipher_suite_t,
private_tls_crypto_t *this, chunk_t session, identification_t *id,
chunk_t client_random, chunk_t server_random)
{
chunk_t master;
if (this->cache && session.len)
{
this->suite = this->cache->lookup(this->cache, session, id, &master);
if (this->suite)
{
this->suite = select_cipher_suite(this, &this->suite, 1, KEY_ANY);
if (this->suite)
{
if (!this->prf->set_key(this->prf, master) ||
!expand_keys(this, client_random, server_random))
{
this->suite = 0;
}
}
chunk_clear(&master);
}
return this->suite;
}
return 0;
}
METHOD(tls_crypto_t, get_session, chunk_t,
private_tls_crypto_t *this, identification_t *server)
{
if (this->cache)
{
return this->cache->check(this->cache, server);
}
return chunk_empty;
}
METHOD(tls_crypto_t, change_cipher, void,
private_tls_crypto_t *this, bool inbound)
{
if (this->protection)
{
if (inbound)
{
this->protection->set_cipher(this->protection, TRUE, this->aead_in);
this->aead_in = NULL;
}
else
{
this->protection->set_cipher(this->protection, FALSE, this->aead_out);
this->aead_out = NULL;
}
}
}
METHOD(tls_crypto_t, get_eap_msk, chunk_t,
private_tls_crypto_t *this)
{
return this->msk;
}
METHOD(tls_crypto_t, destroy, void,
private_tls_crypto_t *this)
{
destroy_aeads(this);
free(this->handshake.ptr);
free(this->msk.ptr);
DESTROY_IF(this->prf);
DESTROY_IF(this->hkdf);
free(this->suites);
free(this);
}
/**
* See header
*/
tls_crypto_t *tls_crypto_create(tls_t *tls, tls_cache_t *cache)
{
private_tls_crypto_t *this;
enumerator_t *enumerator;
credential_type_t type;
int subtype;
INIT(this,
.public = {
.get_cipher_suites = _get_cipher_suites,
.select_cipher_suite = _select_cipher_suite,
.get_dh_group = _get_dh_group,
.get_signature_algorithms = _get_signature_algorithms,
.create_ec_enumerator = _create_ec_enumerator,
.set_protection = _set_protection,
.append_handshake = _append_handshake,
.hash_handshake = _hash_handshake,
.sign = _sign,
.verify = _verify,
.sign_handshake = _sign_handshake,
.verify_handshake = _verify_handshake,
.calculate_finished_legacy = _calculate_finished_legacy,
.calculate_finished = _calculate_finished,
.derive_secrets = _derive_secrets,
.derive_handshake_keys = _derive_handshake_keys,
.derive_app_keys = _derive_app_keys,
.update_app_keys = _update_app_keys,
.resume_session = _resume_session,
.get_session = _get_session,
.change_cipher = _change_cipher,
.get_eap_msk = _get_eap_msk,
.destroy = _destroy,
},
.tls = tls,
.cache = cache,
);
/* FIXME: EDDSA keys are currently treated like ECDSA keys. A cleaner
* separation would be welcome. */
enumerator = lib->creds->create_builder_enumerator(lib->creds);
while (enumerator->enumerate(enumerator, &type, &subtype))
{
if (type == CRED_PUBLIC_KEY)
{
switch (subtype)
{
case KEY_RSA:
this->rsa = TRUE;
break;
case KEY_ECDSA:
case KEY_ED25519:
case KEY_ED448:
this->ecdsa = TRUE;
break;
default:
break;
}
}
}
enumerator->destroy(enumerator);
switch (tls->get_purpose(tls))
{
case TLS_PURPOSE_EAP_TLS:
/* MSK PRF ASCII constant label according to EAP-TLS RFC 5216 */
this->msk_label = "client EAP encryption";
break;
case TLS_PURPOSE_EAP_PEAP:
this->msk_label = "client EAP encryption";
break;
case TLS_PURPOSE_EAP_TTLS:
/* MSK PRF ASCII constant label according to EAP-TTLS RFC 5281 */
this->msk_label = "ttls keying material";
break;
default:
break;
}
return &this->public;
}
/**
* See header.
*/
int tls_crypto_get_supported_suites(bool null, tls_version_t version,
tls_cipher_suite_t **out)
{
suite_algs_t suites[countof(suite_algs)];
int count = 0, i;
/* initialize copy of suite list */
for (i = 0; i < countof(suite_algs); i++)
{
if (suite_algs[i].min_version <= version &&
suite_algs[i].max_version >= version)
{
suites[count++] = suite_algs[i];
}
}
filter_unsupported_suites(suites, &count);
if (!null)
{
filter_null_suites(suites, &count);
}
if (out)
{
*out = calloc(count, sizeof(tls_cipher_suite_t));
for (i = 0; i < count; i++)
{
(*out)[i] = suites[i].suite;
}
}
return count;
}
/**
* See header.
*/
int tls_crypto_get_supported_groups(diffie_hellman_group_t **out)
{
enumerator_t *enumerator;
diffie_hellman_group_t groups[countof(curves)];
diffie_hellman_group_t group;
tls_named_group_t curve;
int count = 0, i;
enumerator = enumerator_create_filter(
lib->crypto->create_dh_enumerator(lib->crypto),
group_filter, NULL, NULL);
while (enumerator->enumerate(enumerator, &group, &curve))
{
groups[count++] = group;
}
enumerator->destroy(enumerator);
if (out)
{
*out = calloc(count, sizeof(diffie_hellman_group_t));
for (i = 0; i < count; i++)
{
(*out)[i] = groups[i];
}
}
return count;
}
/**
* See header.
*/
int tls_crypto_get_supported_signatures(tls_version_t version,
tls_signature_scheme_t **out)
{
scheme_algs_t sigs[countof(schemes)];
int count = 0, i;
/* initialize copy of signature scheme list */
for (i = 0; i < countof(schemes); i++)
{
/* only RSA_PSS_RSAE schemes supported for signing and verifying */
if (schemes[i].sig == TLS_SIG_RSA_PSS_PSS_SHA256 ||
schemes[i].sig == TLS_SIG_RSA_PSS_PSS_SHA384 ||
schemes[i].sig == TLS_SIG_RSA_PSS_PSS_SHA512)
{
continue;
}
if (schemes[i].min_version <= version &&
schemes[i].max_version >= version &&
lib->plugins->has_feature(lib->plugins,
PLUGIN_PROVIDE(PUBKEY_VERIFY, schemes[i].params.scheme)))
{
sigs[count++] = schemes[i];
}
}
if (out)
{
*out = calloc(count, sizeof(tls_signature_scheme_t));
for (i = 0; i < count; i++)
{
(*out)[i] = sigs[i].sig;
}
}
return count;
}
/**
* See header.
*/
tls_named_group_t tls_ec_group_to_curve(diffie_hellman_group_t group)
{
int i;
for (i = 0; i < countof(curves); i++)
{
if (curves[i].group == group)
{
return curves[i].curve;
}
}
return 0;
}
/**
* See header.
*/
key_type_t tls_signature_scheme_to_key_type(tls_signature_scheme_t sig)
{
int i;
for (i = 0; i < countof(schemes); i++)
{
if (schemes[i].sig == sig)
{
return key_type_from_signature_scheme(schemes[i].params.scheme);
}
}
return 0;
}
/**
* Hashtable hash function
*/
static u_int hash_key_type(key_type_t *type)
{
return chunk_hash(chunk_from_thing(*type));
}
/**
* Hashtable equals function
*/
static bool equals_key_type(key_type_t *key1, key_type_t *key2)
{
return *key1 == *key2;
}
CALLBACK(filter_key_types, bool,
void *data, enumerator_t *orig, va_list args)
{
key_type_t *key_type, *out;
VA_ARGS_VGET(args, out);
if (orig->enumerate(orig, NULL, &key_type))
{
*out = *key_type;
return TRUE;
}
return FALSE;
}
CALLBACK(destroy_key_types, void,
hashtable_t *ht)
{
ht->destroy_function(ht, (void*)free);
}
/**
* Create an enumerator over supported key types within a specific TLS range
*/
static enumerator_t *get_supported_key_types(tls_version_t min_version,
tls_version_t max_version)
{
hashtable_t *ht;
key_type_t *type, lookup;
int i;
ht = hashtable_create((hashtable_hash_t)hash_key_type,
(hashtable_equals_t)equals_key_type, 4);
for (i = 0; i < countof(schemes); i++)
{
if (schemes[i].min_version <= max_version &&
schemes[i].max_version >= min_version)
{
lookup = key_type_from_signature_scheme(schemes[i].params.scheme);
if (!ht->get(ht, &lookup))
{
type = malloc_thing(key_type_t);
*type = lookup;
ht->put(ht, type, type);
}
}
}
return enumerator_create_filter(ht->create_enumerator(ht),
filter_key_types, ht, destroy_key_types);
}
/**
* Create an array of an intersection of server and peer supported key types
*/
static array_t *create_common_key_types(enumerator_t *enumerator, chunk_t hashsig)
{
array_t *key_types;
key_type_t v, lookup;
uint16_t sig_scheme;
key_types = array_create(sizeof(key_type_t), 8);
while (enumerator->enumerate(enumerator, &v))
{
bio_reader_t *reader;
reader = bio_reader_create(hashsig);
while (reader->remaining(reader) &&
reader->read_uint16(reader, &sig_scheme))
{
lookup = tls_signature_scheme_to_key_type(sig_scheme);
if (v == lookup)
{
array_insert(key_types, ARRAY_TAIL, &lookup);
break;
}
}
reader->destroy(reader);
}
return key_types;
}
typedef struct {
enumerator_t public;
array_t *key_types;
identification_t *peer;
private_key_t *key;
auth_cfg_t *auth;
} private_key_enumerator_t;
METHOD(enumerator_t, private_key_enumerate, bool,
private_key_enumerator_t *this, va_list args)
{
key_type_t type;
auth_cfg_t **auth_out;
private_key_t **key_out;
VA_ARGS_VGET(args, key_out, auth_out);
DESTROY_IF(this->key);
DESTROY_IF(this->auth);
this->auth = auth_cfg_create();
while (array_remove(this->key_types, ARRAY_HEAD, &type))
{
this->key = lib->credmgr->get_private(lib->credmgr, type, this->peer,
this->auth);
if (this->key)
{
*key_out = this->key;
if (auth_out)
{
*auth_out = this->auth;
}
return TRUE;
}
}
return FALSE;
}
METHOD(enumerator_t, private_key_destroy, void,
private_key_enumerator_t *this)
{
DESTROY_IF(this->key);
DESTROY_IF(this->auth);
array_destroy(this->key_types);
free(this);
}
/**
* See header.
*/
enumerator_t *tls_create_private_key_enumerator(tls_version_t min_version,
tls_version_t max_version,
chunk_t hashsig,
identification_t *peer)
{
private_key_enumerator_t *enumerator;
enumerator_t *key_types;
key_types = get_supported_key_types(min_version, max_version);
INIT(enumerator,
.public = {
.enumerate = enumerator_enumerate_default,
.venumerate = _private_key_enumerate,
.destroy = _private_key_destroy,
},
.key_types = create_common_key_types(key_types, hashsig),
.peer = peer,
);
key_types->destroy(key_types);
if (!array_count(enumerator->key_types))
{
private_key_destroy(enumerator);
return NULL;
}
return &enumerator->public;
}
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