0957b409a9
Disabled by default, used by loader and sbin/veriexec Reviewed by: emaste Sponsored by: Juniper Networks Differential Revision: D16334
602 lines
22 KiB
C
602 lines
22 KiB
C
/*
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* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "bearssl.h"
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/*
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* A "profile" is an initialisation function for a SSL context, that
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* configures a list of cipher suites and algorithm implementations.
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* While BearSSL comes with a few predefined profiles, you might one
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* to define you own, using the example below as guidance.
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*
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* Each individual initialisation call sets a parameter or an algorithm
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* support. Setting a specific algorithm pulls in the implementation of
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* that algorithm in the compiled binary, as per static linking
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* behaviour. Removing some of this calls will then reduce total code
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* footprint, but also mechanically prevents some features to be
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* supported (protocol versions and cipher suites).
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*
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* The two below define profiles for the client and the server contexts,
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* respectively. Of course, in a typical size-constrained application,
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* you would use one or the other, not both, to avoid pulling in code
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* for both.
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*/
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void
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example_client_profile(br_ssl_client_context *cc
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/* and possibly some other arguments */)
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{
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/*
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* A list of cipher suites, by preference (first is most
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* preferred). The list below contains all cipher suites supported
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* by BearSSL; trim it done to your needs.
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*/
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static const uint16_t suites[] = {
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BR_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
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BR_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
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BR_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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BR_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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BR_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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BR_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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BR_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
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BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
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BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
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BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
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BR_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
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BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
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BR_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
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BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
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BR_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256,
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BR_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256,
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BR_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384,
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BR_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384,
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BR_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256,
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BR_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256,
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BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384,
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BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384,
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BR_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,
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BR_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,
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BR_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA,
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BR_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA,
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BR_TLS_RSA_WITH_AES_128_GCM_SHA256,
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BR_TLS_RSA_WITH_AES_256_GCM_SHA384,
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BR_TLS_RSA_WITH_AES_128_CBC_SHA256,
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BR_TLS_RSA_WITH_AES_256_CBC_SHA256,
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BR_TLS_RSA_WITH_AES_128_CBC_SHA,
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BR_TLS_RSA_WITH_AES_256_CBC_SHA,
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BR_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,
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BR_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
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BR_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
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BR_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA,
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BR_TLS_RSA_WITH_3DES_EDE_CBC_SHA
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};
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/*
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* Client context must be cleared at some point. This sets
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* every value and pointer to 0 or NULL.
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*/
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br_ssl_client_zero(cc);
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/*
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* Define minimum and maximum protocol versions. Supported
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* versions are:
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* BR_TLS10 TLS 1.0
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* BR_TLS11 TLS 1.1
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* BR_TLS12 TLS 1.2
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*/
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br_ssl_engine_set_versions(&cc->eng, BR_TLS10, BR_TLS12);
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/*
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* Set the PRF implementation(s).
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* For TLS 1.0 and 1.1, the "prf10" is needed.
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* For TLS 1.2, this depends on the cipher suite:
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* -- cipher suites with a name ending in "SHA384" need "prf_sha384";
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* -- all others need "prf_sha256".
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*
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* Note that a cipher suite like TLS_RSA_WITH_AES_128_CBC_SHA will
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* use SHA-1 for the per-record MAC (that's what the final "SHA"
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* means), but still SHA-256 for the PRF when selected along with
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* the TLS-1.2 protocol version.
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*/
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br_ssl_engine_set_prf10(&cc->eng, &br_tls10_prf);
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br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf);
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br_ssl_engine_set_prf_sha384(&cc->eng, &br_tls12_sha384_prf);
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/*
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* Set hash functions for the engine. Required hash functions
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* depend on the protocol and cipher suite:
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*
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* -- TLS 1.0 and 1.1 require both MD5 and SHA-1.
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* -- With TLS 1.2, cipher suites with a name ending in "SHA384"
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* require SHA-384.
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* -- With TLS 1.2, cipher suites with a name ending in "SHA256"
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* require SHA-256.
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* -- With TLS 1.2, cipher suites with a name ending in "SHA"
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* require both SHA-256 and SHA-1.
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*
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* Moreover, these hash functions are also used to compute
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* hashes supporting signatures on the server side (for ECDHE_*
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* cipher suites), and on the client side (for client
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* certificates, except in the case of full static ECDH). In TLS
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* 1.0 and 1.1, SHA-1 (and also MD5) will be used, but with TLS
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* 1.2 these hash functions are negotiated between client and
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* server; SHA-256 and/or SHA-384 should be sufficient in
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* practice.
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*
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* Note that with current implementations, SHA-224 and SHA-256
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* share the same file, so if you use one, you may have the other
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* one with no additional overhead. Similarly, SHA-384 and SHA-512
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* share the same implementation code.
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*/
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br_ssl_engine_set_hash(&cc->eng, br_md5_ID, &br_md5_vtable);
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br_ssl_engine_set_hash(&cc->eng, br_sha1_ID, &br_sha1_vtable);
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br_ssl_engine_set_hash(&cc->eng, br_sha224_ID, &br_sha224_vtable);
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br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable);
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br_ssl_engine_set_hash(&cc->eng, br_sha384_ID, &br_sha384_vtable);
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br_ssl_engine_set_hash(&cc->eng, br_sha512_ID, &br_sha512_vtable);
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/*
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* Set the cipher suites. All specified cipher suite MUST be
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* supported, and the relevant algorithms MUST have been
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* configured (failure to provide needed implementations may
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* trigger unwanted behaviours like segfaults or overflows).
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*/
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br_ssl_engine_set_suites(&cc->eng, suites,
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(sizeof suites) / (sizeof suites[0]));
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/*
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* Public-key algorithm implementations.
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*
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* -- RSA public core ("rsapub") is needed for "RSA" key exchange
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* (cipher suites whose name starts with TLS_RSA).
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*
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* -- RSA signature verification ("rsavrfy") is needed for
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* "ECDHE_RSA" cipher suites (not ECDH_RSA).
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*
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* -- Elliptic curve implementation ("ec") is needed for cipher
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* suites that use elliptic curves (both "ECDH" and "ECDHE"
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* cipher suites).
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*
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* -- ECDSA signature verification is needed for "ECDHE_ECDSA"
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* cipher suites (but not for ECDHE_RSA, ECDH_ECDSA or ECDH_RSA).
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*
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* Normally, you use the "default" implementations, obtained
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* through relevant function calls. These functions return
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* implementations that are deemed "best" for the current
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* platform, where "best" means "fastest within constant-time
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* implementations". Selecting the default implementation is a
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* mixture of compile-time and runtime checks.
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*
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* Nevertheless, specific implementations may be selected
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* explicitly, e.g. to use code which is slower but with a
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* smaller footprint.
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*
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* The RSA code comes in three variants, called "i15", "i31" and
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* "i32". The "i31" code is somewhat faster than the "i32" code.
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* Usually, "i31" is faster than "i15", except on some specific
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* architectures (ARM Cortex M0, M0+, M1 and M3) where the "i15"
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* should be preferred (the "i15" code is constant-time, while
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* the "i31" is not, and the "i15" code is faster anyway).
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*
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* ECDSA code also comes in "i15" and "i31" variants. As in the
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* case of RSA, the "i31" code is faster, except on the small
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* ARM Cortex M, where the "i15" code is faster and safer.
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*
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* There are no less than 10 elliptic curve implementations:
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*
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* - ec_c25519_i15, ec_c25519_i31, ec_c25519_m15 and ec_c25519_m31
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* implement Curve25519.
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*
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* - ec_p256_m15 and ec_p256_m31 implement NIST curve P-256.
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*
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* - ec_prime_i15 and ec_prime_i31 implement NIST curves P-256,
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* P-384 and P-521.
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*
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* - ec_all_m15 is an aggregate implementation that uses
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* ec_c25519_m15, ec_p256_m15 and ec_prime_i15.
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*
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* - ec_all_m31 is an aggregate implementation that uses
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* ec_c25519_m31, ec_p256_m31 and ec_prime_i31.
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*
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* For a given curve, "m15" is faster than "i15" (but possibly
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* with a larger code footprint) and "m31" is faster than "i31"
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* (there again with a larger code footprint). For best
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* performance, use ec_all_m31, except on the small ARM Cortex M
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* where ec_all_m15 should be used. Referencing the other
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* implementations directly will result in smaller code, but
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* support for fewer curves and possibly lower performance.
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*/
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br_ssl_client_set_default_rsapub(cc);
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br_ssl_engine_set_default_rsavrfy(&cc->eng);
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br_ssl_engine_set_default_ecdsa(&cc->eng);
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/* Alternate: set implementations explicitly.
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br_ssl_client_set_rsapub(cc, &br_rsa_i31_public);
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br_ssl_client_set_rsavrfy(cc, &br_rsa_i31_pkcs1_vrfy);
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br_ssl_engine_set_ec(&cc->eng, &br_ec_all_m31);
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br_ssl_engine_set_ecdsa(&cc->eng, &br_ecdsa_i31_vrfy_asn1);
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*/
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/*
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* Record handler:
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* -- Cipher suites in AES_128_CBC, AES_256_CBC and 3DES_EDE_CBC
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* need the CBC record handler ("set_cbc").
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* -- Cipher suites in AES_128_GCM and AES_256_GCM need the GCM
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* record handler ("set_gcm").
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* -- Cipher suites in CHACHA20_POLY1305 need the ChaCha20+Poly1305
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* record handler ("set_chapol").
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*/
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br_ssl_engine_set_cbc(&cc->eng,
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&br_sslrec_in_cbc_vtable,
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&br_sslrec_out_cbc_vtable);
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br_ssl_engine_set_gcm(&cc->eng,
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&br_sslrec_in_gcm_vtable,
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&br_sslrec_out_gcm_vtable);
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br_ssl_engine_set_chapol(&cc->eng,
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&br_sslrec_in_chapol_vtable,
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&br_sslrec_out_chapol_vtable);
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/*
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* Symmetric encryption:
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* -- AES_128_CBC and AES_256_CBC require an "aes_cbc" implementation
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* (actually two implementations, for encryption and decryption).
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* -- 3DES_EDE_CBC requires a "des_cbc" implementation
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* (actually two implementations, for encryption and decryption).
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* -- AES_128_GCM and AES_256_GCM require an "aes_ctr" imeplementation
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* and also a GHASH implementation.
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*
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* Two 3DES implementations are provided:
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*
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* des_tab Classical table-based implementation; it is
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* not constant-time.
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*
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* dest_ct Constant-time DES/3DES implementation. It is
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* slower than des_tab.
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*
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* Four AES implementations are provided:
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*
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* aes_ct Constant-time AES implementation, for 32-bit
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* systems.
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*
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* aes_ct64 Constant-time AES implementation, for 64-bit
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* systems. It actually also runs on 32-bit systems,
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* but, on such systems, it yields larger code and
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* slightly worse performance. On 64-bit systems,
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* aes_ct64 is about twice faster than aes_ct for
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* CTR processing (GCM encryption and decryption),
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* and for CBC (decryption only).
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*
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* aes_small Smallest implementation provided, but also the
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* slowest, and it is not constant-time. Use it
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* only if desperate for code size.
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*
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* aes_big Classical table-based AES implementation. This
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* is decently fast and still resonably compact,
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* but it is not constant-time.
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*
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* aes_x86ni Very fast implementation that uses the AES-NI
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* opcodes on recent x86 CPU. But it may not be
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* compiled in the library if the compiler or
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* architecture is not supported; and the CPU
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* may also not support the opcodes. Selection
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* functions are provided to test for availability
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* of the code and the opcodes.
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*
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* Whether having constant-time implementations is absolutely
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* required for security depends on the context (in particular
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* whether the target architecture actually has cache memory),
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* and while side-channel analysis for non-constant-time AES
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* code has been demonstrated in lab conditions, it certainly
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* does not apply to all actual usages, and it has never been
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* spotted in the wild. It is still considered cautious to use
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* constant-time code by default, and to consider the other
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* implementations only if duly measured performance issues make
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* it mandatory.
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*/
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br_ssl_engine_set_aes_cbc(&cc->eng,
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&br_aes_ct_cbcenc_vtable,
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&br_aes_ct_cbcdec_vtable);
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br_ssl_engine_set_aes_ctr(&cc->eng,
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&br_aes_ct_ctr_vtable);
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/* Alternate: aes_ct64
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br_ssl_engine_set_aes_cbc(&cc->eng,
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&br_aes_ct64_cbcenc_vtable,
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&br_aes_ct64_cbcdec_vtable);
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br_ssl_engine_set_aes_ctr(&cc->eng,
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&br_aes_ct64_ctr_vtable);
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*/
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/* Alternate: aes_small
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br_ssl_engine_set_aes_cbc(&cc->eng,
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&br_aes_small_cbcenc_vtable,
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&br_aes_small_cbcdec_vtable);
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br_ssl_engine_set_aes_ctr(&cc->eng,
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&br_aes_small_ctr_vtable);
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*/
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/* Alternate: aes_big
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br_ssl_engine_set_aes_cbc(&cc->eng,
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&br_aes_big_cbcenc_vtable,
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&br_aes_big_cbcdec_vtable);
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br_ssl_engine_set_aes_ctr(&cc->eng,
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&br_aes_big_ctr_vtable);
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*/
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br_ssl_engine_set_des_cbc(&cc->eng,
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&br_des_ct_cbcenc_vtable,
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&br_des_ct_cbcdec_vtable);
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/* Alternate: des_tab
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br_ssl_engine_set_des_cbc(&cc->eng,
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&br_des_tab_cbcenc_vtable,
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&br_des_tab_cbcdec_vtable);
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*/
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/*
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* GHASH is needed for AES_128_GCM and AES_256_GCM. Three
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* implementations are provided:
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*
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* ctmul Uses 32-bit multiplications with a 64-bit result.
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*
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* ctmul32 Uses 32-bit multiplications with a 32-bit result.
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*
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* ctmul64 Uses 64-bit multiplications with a 64-bit result.
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*
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* On 64-bit platforms, ctmul64 is the smallest and fastest of
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* the three. On 32-bit systems, ctmul should be preferred. The
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* ctmul32 implementation is meant to be used for the specific
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* 32-bit systems that do not have a 32x32->64 multiplier (i.e.
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* the ARM Cortex-M0 and Cortex-M0+).
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*
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* These implementations are all constant-time as long as the
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* underlying multiplication opcode is constant-time (which is
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* true for all modern systems, but not for older architectures
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* such that ARM9 or 80486).
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*/
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br_ssl_engine_set_ghash(&cc->eng,
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&br_ghash_ctmul);
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/* Alternate: ghash_ctmul32
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br_ssl_engine_set_ghash(&cc->eng,
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&br_ghash_ctmul32);
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*/
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/* Alternate: ghash_ctmul64
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br_ssl_engine_set_ghash(&cc->eng,
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&br_ghash_ctmul64);
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*/
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#if 0
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/*
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* For a client, the normal case is to validate the server
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* certificate with regards to a set of trust anchors. This
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* entails using a br_x509_minimal_context structure, configured
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* with the relevant algorithms, as shown below.
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*
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* Alternatively, the client could "know" the intended server
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* public key through an out-of-band mechanism, in which case
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* a br_x509_knownkey_context is appropriate, for a much reduced
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* code footprint.
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*
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* We assume here that the following extra parameters have been
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* provided:
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*
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* xc engine context (br_x509_minimal_context *)
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* trust_anchors trust anchors (br_x509_trust_anchor *)
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* trust_anchors_num number of trust anchors (size_t)
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*/
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/*
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* The X.509 engine needs a hash function for processing the
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* subject and issuer DN of certificates and trust anchors. Any
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* supported hash function is appropriate; here we use SHA-256.
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* The trust an
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*/
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br_x509_minimal_init(xc, &br_sha256_vtable,
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trust_anchors, trust_anchors_num);
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/*
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* Set suites and asymmetric crypto implementations. We use the
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* "i31" code for RSA (it is somewhat faster than the "i32"
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* implementation). These implementations are used for
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* signature verification on certificates, but not for the
|
|
* SSL-specific usage of the server's public key. For instance,
|
|
* if the server has an EC public key but the rest of the chain
|
|
* (intermediate CA, root...) use RSA, then you would need only
|
|
* the RSA verification function below.
|
|
*/
|
|
br_x509_minimal_set_rsa(xc, &br_rsa_i31_pkcs1_vrfy);
|
|
br_x509_minimal_set_ecdsa(xc,
|
|
&br_ec_prime_i31, &br_ecdsa_i31_vrfy_asn1);
|
|
|
|
/*
|
|
* Set supported hash functions. These are for signatures on
|
|
* certificates. There again, you only need the hash functions
|
|
* that are actually used in certificates, but if a given
|
|
* function was included for the SSL engine, you may as well
|
|
* add it here.
|
|
*
|
|
* Note: the engine explicitly rejects signatures that use MD5.
|
|
* Thus, there is no need for MD5 here.
|
|
*/
|
|
br_ssl_engine_set_hash(xc, br_sha1_ID, &br_sha1_vtable);
|
|
br_ssl_engine_set_hash(xc, br_sha224_ID, &br_sha224_vtable);
|
|
br_ssl_engine_set_hash(xc, br_sha256_ID, &br_sha256_vtable);
|
|
br_ssl_engine_set_hash(xc, br_sha384_ID, &br_sha384_vtable);
|
|
br_ssl_engine_set_hash(xc, br_sha512_ID, &br_sha512_vtable);
|
|
|
|
/*
|
|
* Link the X.509 engine in the SSL engine.
|
|
*/
|
|
br_ssl_engine_set_x509(&cc->eng, &xc->vtable);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Example server profile. Most of it is shared with the client
|
|
* profile, so see the comments in the client function for details.
|
|
*
|
|
* This example function assumes a server with a (unique) RSA private
|
|
* key, so the list of cipher suites is trimmed down for RSA.
|
|
*/
|
|
void
|
|
example_server_profile(br_ssl_server_context *cc,
|
|
const br_x509_certificate *chain, size_t chain_len,
|
|
const br_rsa_private_key *sk)
|
|
{
|
|
static const uint16_t suites[] = {
|
|
BR_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
|
|
BR_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
|
|
BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
|
|
BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
|
|
BR_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
|
|
BR_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
|
|
BR_TLS_RSA_WITH_AES_128_GCM_SHA256,
|
|
BR_TLS_RSA_WITH_AES_256_GCM_SHA384,
|
|
BR_TLS_RSA_WITH_AES_128_CBC_SHA256,
|
|
BR_TLS_RSA_WITH_AES_256_CBC_SHA256,
|
|
BR_TLS_RSA_WITH_AES_128_CBC_SHA,
|
|
BR_TLS_RSA_WITH_AES_256_CBC_SHA,
|
|
BR_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
|
|
BR_TLS_RSA_WITH_3DES_EDE_CBC_SHA
|
|
};
|
|
|
|
br_ssl_server_zero(cc);
|
|
br_ssl_engine_set_versions(&cc->eng, BR_TLS10, BR_TLS12);
|
|
|
|
br_ssl_engine_set_prf10(&cc->eng, &br_tls10_prf);
|
|
br_ssl_engine_set_prf_sha256(&cc->eng, &br_tls12_sha256_prf);
|
|
br_ssl_engine_set_prf_sha384(&cc->eng, &br_tls12_sha384_prf);
|
|
|
|
/*
|
|
* Apart from the requirements listed in the client side, these
|
|
* hash functions are also used by the server to compute its
|
|
* signature on ECDHE parameters. Which functions are needed
|
|
* depends on what the client may support; furthermore, the
|
|
* client may fail to send the relevant extension, in which
|
|
* case the server will default to whatever it can (as per the
|
|
* standard, it should be SHA-1 in that case).
|
|
*/
|
|
br_ssl_engine_set_hash(&cc->eng, br_md5_ID, &br_md5_vtable);
|
|
br_ssl_engine_set_hash(&cc->eng, br_sha1_ID, &br_sha1_vtable);
|
|
br_ssl_engine_set_hash(&cc->eng, br_sha224_ID, &br_sha224_vtable);
|
|
br_ssl_engine_set_hash(&cc->eng, br_sha256_ID, &br_sha256_vtable);
|
|
br_ssl_engine_set_hash(&cc->eng, br_sha384_ID, &br_sha384_vtable);
|
|
br_ssl_engine_set_hash(&cc->eng, br_sha512_ID, &br_sha512_vtable);
|
|
|
|
br_ssl_engine_set_suites(&cc->eng, suites,
|
|
(sizeof suites) / (sizeof suites[0]));
|
|
|
|
/*
|
|
* Elliptic curve implementation is used for ECDHE suites (but
|
|
* not for ECDH).
|
|
*/
|
|
br_ssl_engine_set_ec(&cc->eng, &br_ec_prime_i31);
|
|
|
|
/*
|
|
* Set the "server policy": handler for the certificate chain
|
|
* and private key operations. Here, we indicate that the RSA
|
|
* private key is fit for both signing and decrypting, and we
|
|
* provide the two relevant implementations.
|
|
|
|
* BR_KEYTYPE_KEYX allows TLS_RSA_*, BR_KEYTYPE_SIGN allows
|
|
* TLS_ECDHE_RSA_*.
|
|
*/
|
|
br_ssl_server_set_single_rsa(cc, chain, chain_len, sk,
|
|
BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN,
|
|
br_rsa_i31_private, br_rsa_i31_pkcs1_sign);
|
|
/*
|
|
* If the server used an EC private key, this call would look
|
|
* like this:
|
|
|
|
br_ssl_server_set_single_ec(cc, chain, chain_len, sk,
|
|
BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN,
|
|
cert_issuer_key_type,
|
|
&br_ec_prime_i31, br_ecdsa_i31_sign_asn1);
|
|
|
|
* Note the tricky points:
|
|
*
|
|
* -- "ECDH" cipher suites use only the EC code (&br_ec_prime_i31);
|
|
* the ECDHE_ECDSA cipher suites need both the EC code and
|
|
* the ECDSA signature implementation.
|
|
*
|
|
* -- For "ECDH" (not "ECDHE") cipher suites, the engine must
|
|
* know the key type (RSA or EC) for the intermediate CA that
|
|
* issued the server's certificate; this is an artefact of
|
|
* how the protocol is defined. BearSSL won't try to decode
|
|
* the server's certificate to obtain that information (it
|
|
* could do that, the code is there, but it would increase the
|
|
* footprint). So this must be provided by the caller.
|
|
*
|
|
* -- BR_KEYTYPE_KEYX allows ECDH, BR_KEYTYPE_SIGN allows
|
|
* ECDHE_ECDSA.
|
|
*/
|
|
|
|
br_ssl_engine_set_cbc(&cc->eng,
|
|
&br_sslrec_in_cbc_vtable,
|
|
&br_sslrec_out_cbc_vtable);
|
|
br_ssl_engine_set_gcm(&cc->eng,
|
|
&br_sslrec_in_gcm_vtable,
|
|
&br_sslrec_out_gcm_vtable);
|
|
|
|
br_ssl_engine_set_aes_cbc(&cc->eng,
|
|
&br_aes_ct_cbcenc_vtable,
|
|
&br_aes_ct_cbcdec_vtable);
|
|
br_ssl_engine_set_aes_ctr(&cc->eng,
|
|
&br_aes_ct_ctr_vtable);
|
|
/* Alternate: aes_ct64
|
|
br_ssl_engine_set_aes_cbc(&cc->eng,
|
|
&br_aes_ct64_cbcenc_vtable,
|
|
&br_aes_ct64_cbcdec_vtable);
|
|
br_ssl_engine_set_aes_ctr(&cc->eng,
|
|
&br_aes_ct64_ctr_vtable);
|
|
*/
|
|
/* Alternate: aes_small
|
|
br_ssl_engine_set_aes_cbc(&cc->eng,
|
|
&br_aes_small_cbcenc_vtable,
|
|
&br_aes_small_cbcdec_vtable);
|
|
br_ssl_engine_set_aes_ctr(&cc->eng,
|
|
&br_aes_small_ctr_vtable);
|
|
*/
|
|
/* Alternate: aes_big
|
|
br_ssl_engine_set_aes_cbc(&cc->eng,
|
|
&br_aes_big_cbcenc_vtable,
|
|
&br_aes_big_cbcdec_vtable);
|
|
br_ssl_engine_set_aes_ctr(&cc->eng,
|
|
&br_aes_big_ctr_vtable);
|
|
*/
|
|
br_ssl_engine_set_des_cbc(&cc->eng,
|
|
&br_des_ct_cbcenc_vtable,
|
|
&br_des_ct_cbcdec_vtable);
|
|
/* Alternate: des_tab
|
|
br_ssl_engine_set_des_cbc(&cc->eng,
|
|
&br_des_tab_cbcenc_vtable,
|
|
&br_des_tab_cbcdec_vtable);
|
|
*/
|
|
|
|
br_ssl_engine_set_ghash(&cc->eng,
|
|
&br_ghash_ctmul);
|
|
/* Alternate: ghash_ctmul32
|
|
br_ssl_engine_set_ghash(&cc->eng,
|
|
&br_ghash_ctmul32);
|
|
*/
|
|
/* Alternate: ghash_ctmul64
|
|
br_ssl_engine_set_ghash(&cc->eng,
|
|
&br_ghash_ctmul64);
|
|
*/
|
|
}
|