mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
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174 lines
5.2 KiB
C
174 lines
5.2 KiB
C
/*
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* Copyright 2020-2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "internal/ffc.h"
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#include "internal/nelem.h"
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#include "crypto/bn_dh.h"
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#ifndef OPENSSL_NO_DH
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# define FFDHE(sz, keylength) { \
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SN_ffdhe##sz, NID_ffdhe##sz, \
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sz, \
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keylength, \
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&ossl_bignum_ffdhe##sz##_p, &ossl_bignum_ffdhe##sz##_q, \
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&ossl_bignum_const_2, \
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}
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# define MODP(sz, keylength) { \
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SN_modp_##sz, NID_modp_##sz, \
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sz, \
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keylength, \
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&ossl_bignum_modp_##sz##_p, &ossl_bignum_modp_##sz##_q, \
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&ossl_bignum_const_2 \
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}
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# define RFC5114(name, uid, sz, tag) { \
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name, uid, \
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sz, \
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0, \
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&ossl_bignum_dh##tag##_p, &ossl_bignum_dh##tag##_q, \
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&ossl_bignum_dh##tag##_g \
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}
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#else
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# define FFDHE(sz, keylength) { SN_ffdhe##sz, NID_ffdhe##sz }
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# define MODP(sz, keylength) { SN_modp_##sz, NID_modp_##sz }
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# define RFC5114(name, uid, sz, tag) { name, uid }
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#endif
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struct dh_named_group_st {
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const char *name;
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int uid;
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#ifndef OPENSSL_NO_DH
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int32_t nbits;
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int keylength;
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const BIGNUM *p;
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const BIGNUM *q;
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const BIGNUM *g;
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#endif
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};
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/*
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* The private key length values are taken from RFC7919 with the values for
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* MODP primes given the same lengths as the equivalent FFDHE.
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* The MODP 1536 value is approximated.
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*/
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static const DH_NAMED_GROUP dh_named_groups[] = {
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FFDHE(2048, 225),
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FFDHE(3072, 275),
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FFDHE(4096, 325),
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FFDHE(6144, 375),
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FFDHE(8192, 400),
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#ifndef FIPS_MODULE
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MODP(1536, 200),
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#endif
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MODP(2048, 225),
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MODP(3072, 275),
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MODP(4096, 325),
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MODP(6144, 375),
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MODP(8192, 400),
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/*
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* Additional dh named groups from RFC 5114 that have a different g.
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* The uid can be any unique identifier.
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*/
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#ifndef FIPS_MODULE
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RFC5114("dh_1024_160", 1, 1024, 1024_160),
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RFC5114("dh_2048_224", 2, 2048, 2048_224),
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RFC5114("dh_2048_256", 3, 2048, 2048_256),
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#endif
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};
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const DH_NAMED_GROUP *ossl_ffc_name_to_dh_named_group(const char *name)
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{
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size_t i;
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for (i = 0; i < OSSL_NELEM(dh_named_groups); ++i) {
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if (OPENSSL_strcasecmp(dh_named_groups[i].name, name) == 0)
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return &dh_named_groups[i];
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}
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return NULL;
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}
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const DH_NAMED_GROUP *ossl_ffc_uid_to_dh_named_group(int uid)
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{
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size_t i;
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for (i = 0; i < OSSL_NELEM(dh_named_groups); ++i) {
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if (dh_named_groups[i].uid == uid)
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return &dh_named_groups[i];
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}
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return NULL;
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}
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#ifndef OPENSSL_NO_DH
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const DH_NAMED_GROUP *ossl_ffc_numbers_to_dh_named_group(const BIGNUM *p,
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const BIGNUM *q,
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const BIGNUM *g)
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{
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size_t i;
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for (i = 0; i < OSSL_NELEM(dh_named_groups); ++i) {
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/* Keep searching until a matching p and g is found */
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if (BN_cmp(p, dh_named_groups[i].p) == 0
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&& BN_cmp(g, dh_named_groups[i].g) == 0
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/* Verify q is correct if it exists */
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&& (q == NULL || BN_cmp(q, dh_named_groups[i].q) == 0))
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return &dh_named_groups[i];
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}
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return NULL;
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}
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#endif
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int ossl_ffc_named_group_get_uid(const DH_NAMED_GROUP *group)
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{
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if (group == NULL)
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return NID_undef;
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return group->uid;
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}
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const char *ossl_ffc_named_group_get_name(const DH_NAMED_GROUP *group)
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{
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if (group == NULL)
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return NULL;
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return group->name;
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}
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#ifndef OPENSSL_NO_DH
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int ossl_ffc_named_group_get_keylength(const DH_NAMED_GROUP *group)
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{
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if (group == NULL)
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return 0;
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return group->keylength;
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}
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const BIGNUM *ossl_ffc_named_group_get_q(const DH_NAMED_GROUP *group)
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{
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if (group == NULL)
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return NULL;
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return group->q;
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}
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int ossl_ffc_named_group_set(FFC_PARAMS *ffc, const DH_NAMED_GROUP *group)
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{
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if (ffc == NULL || group == NULL)
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return 0;
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ossl_ffc_params_set0_pqg(ffc, (BIGNUM *)group->p, (BIGNUM *)group->q,
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(BIGNUM *)group->g);
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ffc->keylength = group->keylength;
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/* flush the cached nid, The DH layer is responsible for caching */
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ffc->nid = NID_undef;
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return 1;
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}
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#endif
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