/* * Copyright (C) 2010 Martin Willi * Copyright (C) 2010 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 . * * 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 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_SHA2", "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_SHA2", "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_ECDH_ECDSA_WITH_NULL_SHA, TLS_ECDHE_PSK_WITH_NULL_SHA384, TLS_EMPTY_RENEGOTIATION_INFO_SCSV, "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_END(tls_cipher_suite_names, TLS_ECDHE_PSK_WITH_NULL_SHA384); ENUM(tls_hash_algorithm_names, TLS_HASH_NONE, TLS_HASH_SHA512, "NONE", "MD5", "SHA1", "SHA224", "SHA256", "SHA384", "SHA512", ); ENUM(tls_signature_algorithm_names, TLS_SIG_RSA, TLS_SIG_ECDSA, "RSA", "DSA", "ECDSA", ); 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(tls_named_curve_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(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; /** * 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 concatentated */ chunk_t handshake; /** * Connection state TLS PRF */ tls_prf_t *prf; /** * Signer instance for inbound traffic */ signer_t *signer_in; /** * Signer instance for outbound traffic */ signer_t *signer_out; /** * Crypter instance for inbound traffic */ crypter_t *crypter_in; /** * Crypter instance for outbound traffic */ crypter_t *crypter_out; /** * IV for input decryption, if < TLSv1.2 */ chunk_t iv_in; /** * IV for output decryption, if < TLSv1.2 */ chunk_t iv_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; } suite_algs_t; /** * Mapping suites to a set of algorithms */ static suite_algs_t suite_algs[] = { { 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_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_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_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_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_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_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_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_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 }, { 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_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 }, { 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_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 }, { 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_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 }, { 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_DHE_RSA_WITH_3DES_EDE_CBC_SHA, KEY_RSA, MODP_2048_BIT, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_3DES, 0 }, { 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 }, { 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_RSA_WITH_AES_256_CBC_SHA, KEY_RSA, MODP_NONE, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_AES_CBC, 32 }, { 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_RSA_WITH_CAMELLIA_128_CBC_SHA, KEY_RSA, MODP_NONE, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_CAMELLIA_CBC, 16 }, { 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_RSA_WITH_CAMELLIA_256_CBC_SHA, KEY_RSA, MODP_NONE, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_CAMELLIA_CBC, 32 }, { 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_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, KEY_ECDSA, ECP_256_BIT, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_3DES, 0 }, { TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, KEY_RSA, ECP_256_BIT, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_3DES, 0 }, { TLS_RSA_WITH_3DES_EDE_CBC_SHA, KEY_RSA, MODP_NONE, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_3DES, 0 }, { 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_ECDHE_RSA_WITH_NULL_SHA, KEY_ECDSA, ECP_256_BIT, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_NULL, 0 }, { TLS_RSA_WITH_NULL_SHA, KEY_RSA, MODP_NONE, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA1_160, ENCR_NULL, 0 }, { TLS_RSA_WITH_NULL_SHA256, KEY_RSA, MODP_NONE, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_SHA2_256_256, ENCR_NULL, 0 }, { TLS_RSA_WITH_NULL_MD5, KEY_RSA, MODP_NONE, HASH_SHA256, PRF_HMAC_SHA2_256, AUTH_HMAC_MD5_128, ENCR_NULL, 0 }, }; /** * 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(private_tls_crypto_t *this, 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++) { enumerator = create_enumerator(lib->crypto); while (enumerator->enumerate(enumerator, current_alg, &plugin_name)) { if ((suites[i].encr == ENCR_NULL || !current.encr || current.encr == suites[i].encr) && (!current.mac || current.mac == suites[i].mac) && (!current.prf || current.prf == suites[i].prf) && (!current.hash || current.hash == suites[i].hash) && (suites[i].dh == MODP_NONE || !current.dh || current.dh == suites[i].dh)) { suites[remaining] = suites[i]; remaining++; break; } } enumerator->destroy(enumerator); } *count = remaining; } /** * Purge NULL encryption cipher suites from list */ static void filter_null_suites(private_tls_crypto_t *this, 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)) { if (strcaseeq(token, "aes128") && suites[i].encr == ENCR_AES_CBC && suites[i].encr_size == 16) { suites[remaining++] = suites[i]; break; } if (strcaseeq(token, "aes256") && suites[i].encr == ENCR_AES_CBC && suites[i].encr_size == 32) { suites[remaining++] = suites[i]; break; } if (strcaseeq(token, "camellia128") && suites[i].encr == ENCR_CAMELLIA_CBC && suites[i].encr_size == 16) { suites[remaining++] = suites[i]; break; } if (strcaseeq(token, "camellia256") && suites[i].encr == ENCR_CAMELLIA_CBC && suites[i].encr_size == 32) { suites[remaining++] = suites[i]; break; } if (strcaseeq(token, "3des") && suites[i].encr == ENCR_3DES) { suites[remaining++] = suites[i]; break; } if (strcaseeq(token, "null") && suites[i].encr == ENCR_NULL) { 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, "md5") && suites[i].mac == AUTH_HMAC_MD5_128) { suites[remaining++] = suites[i]; break; } 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)) { suite = enum_from_name(tls_cipher_suite_names, token); if (suite == suites[i].suite) { suites[remaining++] = suites[i]; break; } } enumerator->destroy(enumerator); } *count = remaining; } } /** * Initialize the cipher suite list */ static void build_cipher_suite_list(private_tls_crypto_t *this, bool require_encryption) { suite_algs_t suites[countof(suite_algs)]; int count = countof(suite_algs), i; /* copy all suites */ for (i = 0; i < count; i++) { suites[i] = suite_algs[i]; } if (require_encryption) { filter_null_suites(this, 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 suite list by each algorithm */ filter_suite(this, suites, &count, offsetof(suite_algs_t, encr), lib->crypto->create_crypter_enumerator); filter_suite(this, suites, &count, offsetof(suite_algs_t, mac), lib->crypto->create_signer_enumerator); filter_suite(this, suites, &count, offsetof(suite_algs_t, prf), lib->crypto->create_prf_enumerator); filter_suite(this, suites, &count, offsetof(suite_algs_t, hash), lib->crypto->create_hasher_enumerator); filter_suite(this, suites, &count, offsetof(suite_algs_t, dh), lib->crypto->create_dh_enumerator); /* 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); for (i = 0; i < count; i++) { DBG2(DBG_TLS, " %N", tls_cipher_suite_names, suites[i].suite); this->suites[i] = suites[i].suite; } } METHOD(tls_crypto_t, get_cipher_suites, int, private_tls_crypto_t *this, tls_cipher_suite_t **suites) { *suites = this->suites; return this->suite_count; } /** * Create crypto primitives */ static bool create_ciphers(private_tls_crypto_t *this, suite_algs_t *algs) { DESTROY_IF(this->prf); if (this->tls->get_version(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; } DESTROY_IF(this->signer_in); DESTROY_IF(this->signer_out); this->signer_in = lib->crypto->create_signer(lib->crypto, algs->mac); this->signer_out = lib->crypto->create_signer(lib->crypto, algs->mac); if (!this->signer_in || !this->signer_out) { DBG1(DBG_TLS, "selected TLS MAC %N not supported", integrity_algorithm_names, algs->mac); return FALSE; } DESTROY_IF(this->crypter_in); DESTROY_IF(this->crypter_out); if (algs->encr == ENCR_NULL) { this->crypter_in = this->crypter_out = NULL; } else { this->crypter_in = lib->crypto->create_crypter(lib->crypto, algs->encr, algs->encr_size); this->crypter_out = lib->crypto->create_crypter(lib->crypto, algs->encr, algs->encr_size); if (!this->crypter_in || !this->crypter_out) { DBG1(DBG_TLS, "selected TLS crypter %N not supported", encryption_algorithm_names, algs->encr); return FALSE; } } return TRUE; } 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) { if (create_ciphers(this, algs)) { this->suite = this->suites[i]; return this->suite; } } } } } } return 0; } 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) { return algs->dh; } return MODP_NONE; } METHOD(tls_crypto_t, get_signature_algorithms, void, private_tls_crypto_t *this, bio_writer_t *writer) { bio_writer_t *supported; enumerator_t *enumerator; hash_algorithm_t alg; tls_hash_algorithm_t hash; const char *plugin_name; supported = bio_writer_create(32); enumerator = lib->crypto->create_hasher_enumerator(lib->crypto); while (enumerator->enumerate(enumerator, &alg, &plugin_name)) { switch (alg) { case HASH_MD5: hash = TLS_HASH_MD5; break; case HASH_SHA1: hash = TLS_HASH_SHA1; break; case HASH_SHA224: hash = TLS_HASH_SHA224; break; case HASH_SHA256: hash = TLS_HASH_SHA256; break; case HASH_SHA384: hash = TLS_HASH_SHA384; break; case HASH_SHA512: hash = TLS_HASH_SHA512; break; default: continue; } if (this->rsa) { supported->write_uint8(supported, hash); supported->write_uint8(supported, TLS_SIG_RSA); } if (this->ecdsa && alg != HASH_MD5 && alg != HASH_SHA224) { /* currently we have no signature scheme for MD5/SHA224 */ supported->write_uint8(supported, hash); supported->write_uint8(supported, TLS_SIG_ECDSA); } } enumerator->destroy(enumerator); supported->wrap16(supported); writer->write_data16(writer, supported->get_buf(supported)); supported->destroy(supported); } /** * Mapping groups to TLS named curves */ static struct { diffie_hellman_group_t group; tls_named_curve_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}, }; /** * Filter EC groups, add TLS curve */ static bool group_filter(void *null, diffie_hellman_group_t *in, diffie_hellman_group_t *out, void* dummy1, tls_named_curve_t *curve) { int i; for (i = 0; i < countof(curves); i++) { if (curves[i].group == *in) { if (out) { *out = curves[i].group; } if (curve) { *curve = curves[i].curve; } return TRUE; } } return FALSE; } METHOD(tls_crypto_t, create_ec_enumerator, enumerator_t*, private_tls_crypto_t *this) { return enumerator_create_filter( lib->crypto->create_dh_enumerator(lib->crypto), (void*)group_filter, NULL, NULL); } 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) { u_int32_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(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; } /** * Get the signature scheme from a TLS 1.2 hash/sig algorithm pair */ static signature_scheme_t hashsig_to_scheme(key_type_t type, tls_hash_algorithm_t hash, tls_signature_algorithm_t sig) { switch (sig) { case TLS_SIG_RSA: if (type != KEY_RSA) { return SIGN_UNKNOWN; } switch (hash) { case TLS_HASH_MD5: return SIGN_RSA_EMSA_PKCS1_MD5; case TLS_HASH_SHA1: return SIGN_RSA_EMSA_PKCS1_SHA1; case TLS_HASH_SHA224: return SIGN_RSA_EMSA_PKCS1_SHA224; case TLS_HASH_SHA256: return SIGN_RSA_EMSA_PKCS1_SHA256; case TLS_HASH_SHA384: return SIGN_RSA_EMSA_PKCS1_SHA384; case TLS_HASH_SHA512: return SIGN_RSA_EMSA_PKCS1_SHA512; default: return SIGN_UNKNOWN; } case TLS_SIG_ECDSA: if (type != KEY_ECDSA) { return SIGN_UNKNOWN; } switch (hash) { case TLS_HASH_SHA224: return SIGN_ECDSA_WITH_SHA1_DER; case TLS_HASH_SHA256: return SIGN_ECDSA_WITH_SHA256_DER; case TLS_HASH_SHA384: return SIGN_ECDSA_WITH_SHA384_DER; case TLS_HASH_SHA512: return SIGN_ECDSA_WITH_SHA512_DER; default: return SIGN_UNKNOWN; } default: return SIGN_UNKNOWN; } } 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(this->tls) >= TLS_1_2) { signature_scheme_t scheme; bio_reader_t *reader; u_int8_t hash, alg; chunk_t sig; bool done = FALSE; if (!hashsig.len) { /* fallback if none given */ hashsig = chunk_from_chars( TLS_HASH_SHA1, TLS_SIG_RSA, TLS_HASH_SHA1, TLS_SIG_ECDSA); } reader = bio_reader_create(hashsig); while (reader->remaining(reader) >= 2) { if (reader->read_uint8(reader, &hash) && reader->read_uint8(reader, &alg)) { scheme = hashsig_to_scheme(key->get_type(key), hash, alg); if (scheme != SIGN_UNKNOWN && key->sign(key, scheme, 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/%N", tls_hash_algorithm_names, hash, tls_signature_algorithm_names, alg); writer->write_uint8(writer, hash); writer->write_uint8(writer, alg); 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, 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, data, &sig)) { return FALSE; } DBG2(DBG_TLS, "created signature with SHA1/ECDSA"); 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(this->tls) >= TLS_1_2) { signature_scheme_t scheme = SIGN_UNKNOWN; u_int8_t hash, alg; chunk_t sig; if (!reader->read_uint8(reader, &hash) || !reader->read_uint8(reader, &alg) || !reader->read_data16(reader, &sig)) { DBG1(DBG_TLS, "received invalid signature"); return FALSE; } scheme = hashsig_to_scheme(key->get_type(key), hash, alg); if (scheme == SIGN_UNKNOWN) { DBG1(DBG_TLS, "signature algorithms %N/%N not supported", tls_hash_algorithm_names, hash, tls_signature_algorithm_names, alg); return FALSE; } if (!key->verify(key, scheme, data, sig)) { return FALSE; } DBG2(DBG_TLS, "verified signature with %N/%N", tls_hash_algorithm_names, hash, tls_signature_algorithm_names, alg); } 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, 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, data, sig)) { return FALSE; } DBG2(DBG_TLS, "verified signature with SHA1/ECDSA"); 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, 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; } /** * 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, client_write, server_write; int mks, eks = 0, ivs = 0; /* derive key block for key expansion */ mks = this->signer_out->get_key_size(this->signer_out); if (this->crypter_out) { eks = this->crypter_out->get_key_size(this->crypter_out); if (this->tls->get_version(this->tls) < TLS_1_1) { ivs = this->crypter_out->get_iv_size(this->crypter_out); } } seed = chunk_cata("cc", server_random, client_random); block = chunk_alloca((mks + eks + ivs) * 2); if (!this->prf->get_bytes(this->prf, "key expansion", seed, block.len, block.ptr)) { return FALSE; } /* signer keys */ client_write = chunk_create(block.ptr, mks); block = chunk_skip(block, mks); server_write = chunk_create(block.ptr, mks); block = chunk_skip(block, mks); if (this->tls->is_server(this->tls)) { if (!this->signer_in->set_key(this->signer_in, client_write) || !this->signer_out->set_key(this->signer_out, server_write)) { return FALSE; } } else { if (!this->signer_out->set_key(this->signer_out, client_write) || !this->signer_in->set_key(this->signer_in, server_write)) { return FALSE; } } /* crypter keys, and IVs if < TLSv1.2 */ if (this->crypter_out && this->crypter_in) { client_write = chunk_create(block.ptr, eks); block = chunk_skip(block, eks); server_write = chunk_create(block.ptr, eks); block = chunk_skip(block, eks); if (this->tls->is_server(this->tls)) { if (!this->crypter_in->set_key(this->crypter_in, client_write) || !this->crypter_out->set_key(this->crypter_out, server_write)) { return FALSE; } } else { if (!this->crypter_out->set_key(this->crypter_out, client_write) || !this->crypter_in->set_key(this->crypter_in, server_write)) { return FALSE; } } if (ivs) { client_write = chunk_create(block.ptr, ivs); block = chunk_skip(block, ivs); server_write = chunk_create(block.ptr, ivs); block = chunk_skip(block, ivs); if (this->tls->is_server(this->tls)) { this->iv_in = chunk_clone(client_write); this->iv_out = chunk_clone(server_write); } else { this->iv_out = chunk_clone(client_write); this->iv_in = chunk_clone(server_write); } } } /* 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); } 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->signer_in, this->crypter_in, this->iv_in); } else { this->protection->set_cipher(this->protection, FALSE, this->signer_out, this->crypter_out, this->iv_out); } } } 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_IF(this->signer_in); DESTROY_IF(this->signer_out); DESTROY_IF(this->crypter_in); DESTROY_IF(this->crypter_out); free(this->iv_in.ptr); free(this->iv_out.ptr); free(this->handshake.ptr); free(this->msk.ptr); DESTROY_IF(this->prf); 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, .sign = _sign, .verify = _verify, .sign_handshake = _sign_handshake, .verify_handshake = _verify_handshake, .calculate_finished = _calculate_finished, .derive_secrets = _derive_secrets, .resume_session = _resume_session, .get_session = _get_session, .change_cipher = _change_cipher, .get_eap_msk = _get_eap_msk, .destroy = _destroy, }, .tls = tls, .cache = cache, ); 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: 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"; build_cipher_suite_list(this, FALSE); break; case TLS_PURPOSE_EAP_PEAP: this->msk_label = "client EAP encryption"; build_cipher_suite_list(this, TRUE); break; case TLS_PURPOSE_EAP_TTLS: /* MSK PRF ASCII constant label according to EAP-TTLS RFC 5281 */ this->msk_label = "ttls keying material"; build_cipher_suite_list(this, TRUE); break; case TLS_PURPOSE_GENERIC: build_cipher_suite_list(this, TRUE); break; default: break; } return &this->public; }