| /* |
| * Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| /* |
| * DH low level APIs are deprecated for public use, but still ok for |
| * internal use. |
| */ |
| #include "internal/deprecated.h" |
| |
| #include <string.h> /* strcmp */ |
| #include <openssl/core_dispatch.h> |
| #include <openssl/core_names.h> |
| #include <openssl/bn.h> |
| #include <openssl/err.h> |
| #include "prov/implementations.h" |
| #include "prov/providercommon.h" |
| #include "prov/provider_ctx.h" |
| #include "crypto/dh.h" |
| #include "internal/sizes.h" |
| |
| static OSSL_FUNC_keymgmt_new_fn dh_newdata; |
| static OSSL_FUNC_keymgmt_free_fn dh_freedata; |
| static OSSL_FUNC_keymgmt_gen_init_fn dh_gen_init; |
| static OSSL_FUNC_keymgmt_gen_init_fn dhx_gen_init; |
| static OSSL_FUNC_keymgmt_gen_set_template_fn dh_gen_set_template; |
| static OSSL_FUNC_keymgmt_gen_set_params_fn dh_gen_set_params; |
| static OSSL_FUNC_keymgmt_gen_settable_params_fn dh_gen_settable_params; |
| static OSSL_FUNC_keymgmt_gen_fn dh_gen; |
| static OSSL_FUNC_keymgmt_gen_cleanup_fn dh_gen_cleanup; |
| static OSSL_FUNC_keymgmt_load_fn dh_load; |
| static OSSL_FUNC_keymgmt_get_params_fn dh_get_params; |
| static OSSL_FUNC_keymgmt_gettable_params_fn dh_gettable_params; |
| static OSSL_FUNC_keymgmt_set_params_fn dh_set_params; |
| static OSSL_FUNC_keymgmt_settable_params_fn dh_settable_params; |
| static OSSL_FUNC_keymgmt_has_fn dh_has; |
| static OSSL_FUNC_keymgmt_match_fn dh_match; |
| static OSSL_FUNC_keymgmt_validate_fn dh_validate; |
| static OSSL_FUNC_keymgmt_import_fn dh_import; |
| static OSSL_FUNC_keymgmt_import_types_fn dh_import_types; |
| static OSSL_FUNC_keymgmt_export_fn dh_export; |
| static OSSL_FUNC_keymgmt_export_types_fn dh_export_types; |
| static OSSL_FUNC_keymgmt_dup_fn dh_dup; |
| |
| #define DH_POSSIBLE_SELECTIONS \ |
| (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) |
| |
| struct dh_gen_ctx { |
| OSSL_LIB_CTX *libctx; |
| |
| FFC_PARAMS *ffc_params; |
| int selection; |
| /* All these parameters are used for parameter generation only */ |
| /* If there is a group name then the remaining parameters are not needed */ |
| int group_nid; |
| size_t pbits; |
| size_t qbits; |
| unsigned char *seed; /* optional FIPS186-4 param for testing */ |
| size_t seedlen; |
| int gindex; /* optional FIPS186-4 generator index (ignored if -1) */ |
| int gen_type; /* see dhtype2id */ |
| int generator; /* Used by DH_PARAMGEN_TYPE_GENERATOR in non fips mode only */ |
| int pcounter; |
| int hindex; |
| int priv_len; |
| |
| char *mdname; |
| char *mdprops; |
| OSSL_CALLBACK *cb; |
| void *cbarg; |
| int dh_type; |
| }; |
| |
| static int dh_gen_type_name2id_w_default(const char *name, int type) |
| { |
| if (strcmp(name, "default") == 0) { |
| #ifdef FIPS_MODULE |
| if (type == DH_FLAG_TYPE_DHX) |
| return DH_PARAMGEN_TYPE_FIPS_186_4; |
| |
| return DH_PARAMGEN_TYPE_GROUP; |
| #else |
| if (type == DH_FLAG_TYPE_DHX) |
| return DH_PARAMGEN_TYPE_FIPS_186_2; |
| |
| return DH_PARAMGEN_TYPE_GENERATOR; |
| #endif |
| } |
| |
| return ossl_dh_gen_type_name2id(name, type); |
| } |
| |
| static void *dh_newdata(void *provctx) |
| { |
| DH *dh = NULL; |
| |
| if (ossl_prov_is_running()) { |
| dh = ossl_dh_new_ex(PROV_LIBCTX_OF(provctx)); |
| if (dh != NULL) { |
| DH_clear_flags(dh, DH_FLAG_TYPE_MASK); |
| DH_set_flags(dh, DH_FLAG_TYPE_DH); |
| } |
| } |
| return dh; |
| } |
| |
| static void *dhx_newdata(void *provctx) |
| { |
| DH *dh = NULL; |
| |
| dh = ossl_dh_new_ex(PROV_LIBCTX_OF(provctx)); |
| if (dh != NULL) { |
| DH_clear_flags(dh, DH_FLAG_TYPE_MASK); |
| DH_set_flags(dh, DH_FLAG_TYPE_DHX); |
| } |
| return dh; |
| } |
| |
| static void dh_freedata(void *keydata) |
| { |
| DH_free(keydata); |
| } |
| |
| static int dh_has(const void *keydata, int selection) |
| { |
| const DH *dh = keydata; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || dh == NULL) |
| return 0; |
| if ((selection & DH_POSSIBLE_SELECTIONS) == 0) |
| return 1; /* the selection is not missing */ |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) |
| ok = ok && (DH_get0_pub_key(dh) != NULL); |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) |
| ok = ok && (DH_get0_priv_key(dh) != NULL); |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) |
| ok = ok && (DH_get0_p(dh) != NULL && DH_get0_g(dh) != NULL); |
| return ok; |
| } |
| |
| static int dh_match(const void *keydata1, const void *keydata2, int selection) |
| { |
| const DH *dh1 = keydata1; |
| const DH *dh2 = keydata2; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running()) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| int key_checked = 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) { |
| const BIGNUM *pa = DH_get0_pub_key(dh1); |
| const BIGNUM *pb = DH_get0_pub_key(dh2); |
| |
| if (pa != NULL && pb != NULL) { |
| ok = ok && BN_cmp(pa, pb) == 0; |
| key_checked = 1; |
| } |
| } |
| if (!key_checked |
| && (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) { |
| const BIGNUM *pa = DH_get0_priv_key(dh1); |
| const BIGNUM *pb = DH_get0_priv_key(dh2); |
| |
| if (pa != NULL && pb != NULL) { |
| ok = ok && BN_cmp(pa, pb) == 0; |
| key_checked = 1; |
| } |
| } |
| ok = ok && key_checked; |
| } |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { |
| FFC_PARAMS *dhparams1 = ossl_dh_get0_params((DH *)dh1); |
| FFC_PARAMS *dhparams2 = ossl_dh_get0_params((DH *)dh2); |
| |
| ok = ok && ossl_ffc_params_cmp(dhparams1, dhparams2, 1); |
| } |
| return ok; |
| } |
| |
| static int dh_import(void *keydata, int selection, const OSSL_PARAM params[]) |
| { |
| DH *dh = keydata; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || dh == NULL) |
| return 0; |
| |
| if ((selection & DH_POSSIBLE_SELECTIONS) == 0) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0) |
| ok = ok && ossl_dh_params_fromdata(dh, params); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| int include_private = |
| selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0; |
| |
| ok = ok && ossl_dh_key_fromdata(dh, params, include_private); |
| } |
| |
| return ok; |
| } |
| |
| static int dh_export(void *keydata, int selection, OSSL_CALLBACK *param_cb, |
| void *cbarg) |
| { |
| DH *dh = keydata; |
| OSSL_PARAM_BLD *tmpl = NULL; |
| OSSL_PARAM *params = NULL; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || dh == NULL) |
| return 0; |
| |
| tmpl = OSSL_PARAM_BLD_new(); |
| if (tmpl == NULL) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0) |
| ok = ok && ossl_dh_params_todata(dh, tmpl, NULL); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| int include_private = |
| selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0; |
| |
| ok = ok && ossl_dh_key_todata(dh, tmpl, NULL, include_private); |
| } |
| |
| if (!ok |
| || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) { |
| ok = 0; |
| goto err; |
| } |
| ok = param_cb(params, cbarg); |
| OSSL_PARAM_free(params); |
| err: |
| OSSL_PARAM_BLD_free(tmpl); |
| return ok; |
| } |
| |
| /* IMEXPORT = IMPORT + EXPORT */ |
| |
| # define DH_IMEXPORTABLE_PARAMETERS \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0), \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_COFACTOR, NULL, 0), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), \ |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_DH_PRIV_LEN, NULL), \ |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0), \ |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0) |
| # define DH_IMEXPORTABLE_PUBLIC_KEY \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0) |
| # define DH_IMEXPORTABLE_PRIVATE_KEY \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0) |
| static const OSSL_PARAM dh_all_types[] = { |
| DH_IMEXPORTABLE_PARAMETERS, |
| DH_IMEXPORTABLE_PUBLIC_KEY, |
| DH_IMEXPORTABLE_PRIVATE_KEY, |
| OSSL_PARAM_END |
| }; |
| static const OSSL_PARAM dh_parameter_types[] = { |
| DH_IMEXPORTABLE_PARAMETERS, |
| OSSL_PARAM_END |
| }; |
| static const OSSL_PARAM dh_key_types[] = { |
| DH_IMEXPORTABLE_PUBLIC_KEY, |
| DH_IMEXPORTABLE_PRIVATE_KEY, |
| OSSL_PARAM_END |
| }; |
| static const OSSL_PARAM *dh_types[] = { |
| NULL, /* Index 0 = none of them */ |
| dh_parameter_types, /* Index 1 = parameter types */ |
| dh_key_types, /* Index 2 = key types */ |
| dh_all_types /* Index 3 = 1 + 2 */ |
| }; |
| |
| static const OSSL_PARAM *dh_imexport_types(int selection) |
| { |
| int type_select = 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0) |
| type_select += 1; |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) |
| type_select += 2; |
| return dh_types[type_select]; |
| } |
| |
| static const OSSL_PARAM *dh_import_types(int selection) |
| { |
| return dh_imexport_types(selection); |
| } |
| |
| static const OSSL_PARAM *dh_export_types(int selection) |
| { |
| return dh_imexport_types(selection); |
| } |
| |
| static ossl_inline int dh_get_params(void *key, OSSL_PARAM params[]) |
| { |
| DH *dh = key; |
| OSSL_PARAM *p; |
| |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL |
| && !OSSL_PARAM_set_int(p, DH_bits(dh))) |
| return 0; |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL |
| && !OSSL_PARAM_set_int(p, DH_security_bits(dh))) |
| return 0; |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL |
| && !OSSL_PARAM_set_int(p, DH_size(dh))) |
| return 0; |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY)) != NULL) { |
| if (p->data_type != OSSL_PARAM_OCTET_STRING) |
| return 0; |
| p->return_size = ossl_dh_key2buf(dh, (unsigned char **)&p->data, |
| p->data_size, 0); |
| if (p->return_size == 0) |
| return 0; |
| } |
| |
| return ossl_dh_params_todata(dh, NULL, params) |
| && ossl_dh_key_todata(dh, NULL, params, 1); |
| } |
| |
| static const OSSL_PARAM dh_params[] = { |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0), |
| DH_IMEXPORTABLE_PARAMETERS, |
| DH_IMEXPORTABLE_PUBLIC_KEY, |
| DH_IMEXPORTABLE_PRIVATE_KEY, |
| OSSL_PARAM_END |
| }; |
| |
| static const OSSL_PARAM *dh_gettable_params(void *provctx) |
| { |
| return dh_params; |
| } |
| |
| static const OSSL_PARAM dh_known_settable_params[] = { |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0), |
| OSSL_PARAM_END |
| }; |
| |
| static const OSSL_PARAM *dh_settable_params(void *provctx) |
| { |
| return dh_known_settable_params; |
| } |
| |
| static int dh_set_params(void *key, const OSSL_PARAM params[]) |
| { |
| DH *dh = key; |
| const OSSL_PARAM *p; |
| |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY); |
| if (p != NULL |
| && (p->data_type != OSSL_PARAM_OCTET_STRING |
| || !ossl_dh_buf2key(dh, p->data, p->data_size))) |
| return 0; |
| |
| return 1; |
| } |
| |
| static int dh_validate_public(const DH *dh, int checktype) |
| { |
| const BIGNUM *pub_key = NULL; |
| int res = 0; |
| |
| DH_get0_key(dh, &pub_key, NULL); |
| if (pub_key == NULL) |
| return 0; |
| |
| /* The partial test is only valid for named group's with q = (p - 1) / 2 */ |
| if (checktype == OSSL_KEYMGMT_VALIDATE_QUICK_CHECK |
| && ossl_dh_is_named_safe_prime_group(dh)) |
| return ossl_dh_check_pub_key_partial(dh, pub_key, &res); |
| |
| return DH_check_pub_key(dh, pub_key, &res); |
| } |
| |
| static int dh_validate_private(const DH *dh) |
| { |
| int status = 0; |
| const BIGNUM *priv_key = NULL; |
| |
| DH_get0_key(dh, NULL, &priv_key); |
| if (priv_key == NULL) |
| return 0; |
| return ossl_dh_check_priv_key(dh, priv_key, &status); |
| } |
| |
| static int dh_validate(const void *keydata, int selection, int checktype) |
| { |
| const DH *dh = keydata; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running()) |
| return 0; |
| |
| if ((selection & DH_POSSIBLE_SELECTIONS) == 0) |
| return 1; /* nothing to validate */ |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { |
| /* |
| * Both of these functions check parameters. DH_check_params_ex() |
| * performs a lightweight check (e.g. it does not check that p is a |
| * safe prime) |
| */ |
| if (checktype == OSSL_KEYMGMT_VALIDATE_QUICK_CHECK) |
| ok = ok && DH_check_params_ex(dh); |
| else |
| ok = ok && DH_check_ex(dh); |
| } |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) |
| ok = ok && dh_validate_public(dh, checktype); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) |
| ok = ok && dh_validate_private(dh); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) |
| == OSSL_KEYMGMT_SELECT_KEYPAIR) |
| ok = ok && ossl_dh_check_pairwise(dh); |
| return ok; |
| } |
| |
| static void *dh_gen_init_base(void *provctx, int selection, |
| const OSSL_PARAM params[], int type) |
| { |
| OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx); |
| struct dh_gen_ctx *gctx = NULL; |
| |
| if (!ossl_prov_is_running()) |
| return NULL; |
| |
| if ((selection & (OSSL_KEYMGMT_SELECT_KEYPAIR |
| | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)) == 0) |
| return NULL; |
| |
| if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) { |
| gctx->selection = selection; |
| gctx->libctx = libctx; |
| gctx->pbits = 2048; |
| gctx->qbits = 224; |
| gctx->mdname = NULL; |
| #ifdef FIPS_MODULE |
| gctx->gen_type = (type == DH_FLAG_TYPE_DHX) |
| ? DH_PARAMGEN_TYPE_FIPS_186_4 |
| : DH_PARAMGEN_TYPE_GROUP; |
| #else |
| gctx->gen_type = (type == DH_FLAG_TYPE_DHX) |
| ? DH_PARAMGEN_TYPE_FIPS_186_2 |
| : DH_PARAMGEN_TYPE_GENERATOR; |
| #endif |
| gctx->gindex = -1; |
| gctx->hindex = 0; |
| gctx->pcounter = -1; |
| gctx->generator = DH_GENERATOR_2; |
| gctx->dh_type = type; |
| } |
| if (!dh_gen_set_params(gctx, params)) { |
| OPENSSL_free(gctx); |
| gctx = NULL; |
| } |
| return gctx; |
| } |
| |
| static void *dh_gen_init(void *provctx, int selection, |
| const OSSL_PARAM params[]) |
| { |
| return dh_gen_init_base(provctx, selection, params, DH_FLAG_TYPE_DH); |
| } |
| |
| static void *dhx_gen_init(void *provctx, int selection, |
| const OSSL_PARAM params[]) |
| { |
| return dh_gen_init_base(provctx, selection, params, DH_FLAG_TYPE_DHX); |
| } |
| |
| static int dh_gen_set_template(void *genctx, void *templ) |
| { |
| struct dh_gen_ctx *gctx = genctx; |
| DH *dh = templ; |
| |
| if (!ossl_prov_is_running() || gctx == NULL || dh == NULL) |
| return 0; |
| gctx->ffc_params = ossl_dh_get0_params(dh); |
| return 1; |
| } |
| |
| static int dh_set_gen_seed(struct dh_gen_ctx *gctx, unsigned char *seed, |
| size_t seedlen) |
| { |
| OPENSSL_clear_free(gctx->seed, gctx->seedlen); |
| gctx->seed = NULL; |
| gctx->seedlen = 0; |
| if (seed != NULL && seedlen > 0) { |
| gctx->seed = OPENSSL_memdup(seed, seedlen); |
| if (gctx->seed == NULL) |
| return 0; |
| gctx->seedlen = seedlen; |
| } |
| return 1; |
| } |
| |
| static int dh_gen_common_set_params(void *genctx, const OSSL_PARAM params[]) |
| { |
| struct dh_gen_ctx *gctx = genctx; |
| const OSSL_PARAM *p; |
| |
| if (gctx == NULL) |
| return 0; |
| if (params == NULL) |
| return 1; |
| |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_TYPE); |
| if (p != NULL) { |
| if (p->data_type != OSSL_PARAM_UTF8_STRING |
| || ((gctx->gen_type = |
| dh_gen_type_name2id_w_default(p->data, gctx->dh_type)) == -1)) { |
| ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT); |
| return 0; |
| } |
| } |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_GROUP_NAME); |
| if (p != NULL) { |
| const DH_NAMED_GROUP *group = NULL; |
| |
| if (p->data_type != OSSL_PARAM_UTF8_STRING |
| || p->data == NULL |
| || (group = ossl_ffc_name_to_dh_named_group(p->data)) == NULL |
| || ((gctx->group_nid = |
| ossl_ffc_named_group_get_uid(group)) == NID_undef)) { |
| ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT); |
| return 0; |
| } |
| } |
| if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PBITS)) != NULL |
| && !OSSL_PARAM_get_size_t(p, &gctx->pbits)) |
| return 0; |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_PRIV_LEN); |
| if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->priv_len)) |
| return 0; |
| return 1; |
| } |
| |
| static const OSSL_PARAM *dh_gen_settable_params(ossl_unused void *genctx, |
| ossl_unused void *provctx) |
| { |
| static const OSSL_PARAM dh_gen_settable[] = { |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_DH_PRIV_LEN, NULL), |
| OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_DH_GENERATOR, NULL), |
| OSSL_PARAM_END |
| }; |
| return dh_gen_settable; |
| } |
| |
| static const OSSL_PARAM *dhx_gen_settable_params(ossl_unused void *genctx, |
| ossl_unused void *provctx) |
| { |
| static const OSSL_PARAM dhx_gen_settable[] = { |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_DH_PRIV_LEN, NULL), |
| OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_PBITS, NULL), |
| OSSL_PARAM_size_t(OSSL_PKEY_PARAM_FFC_QBITS, NULL), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST, NULL, 0), |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_DIGEST_PROPS, NULL, 0), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_GINDEX, NULL), |
| OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_PCOUNTER, NULL), |
| OSSL_PARAM_int(OSSL_PKEY_PARAM_FFC_H, NULL), |
| OSSL_PARAM_END |
| }; |
| return dhx_gen_settable; |
| } |
| |
| static int dhx_gen_set_params(void *genctx, const OSSL_PARAM params[]) |
| { |
| struct dh_gen_ctx *gctx = genctx; |
| const OSSL_PARAM *p; |
| |
| if (!dh_gen_common_set_params(genctx, params)) |
| return 0; |
| |
| /* Parameters related to fips186-4 and fips186-2 */ |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX); |
| if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->gindex)) |
| return 0; |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER); |
| if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->pcounter)) |
| return 0; |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H); |
| if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->hindex)) |
| return 0; |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED); |
| if (p != NULL |
| && (p->data_type != OSSL_PARAM_OCTET_STRING |
| || !dh_set_gen_seed(gctx, p->data, p->data_size))) |
| return 0; |
| if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS)) != NULL |
| && !OSSL_PARAM_get_size_t(p, &gctx->qbits)) |
| return 0; |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST); |
| if (p != NULL) { |
| if (p->data_type != OSSL_PARAM_UTF8_STRING) |
| return 0; |
| OPENSSL_free(gctx->mdname); |
| gctx->mdname = OPENSSL_strdup(p->data); |
| if (gctx->mdname == NULL) |
| return 0; |
| } |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST_PROPS); |
| if (p != NULL) { |
| if (p->data_type != OSSL_PARAM_UTF8_STRING) |
| return 0; |
| OPENSSL_free(gctx->mdprops); |
| gctx->mdprops = OPENSSL_strdup(p->data); |
| if (gctx->mdprops == NULL) |
| return 0; |
| } |
| |
| /* Parameters that are not allowed for DHX */ |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_GENERATOR); |
| if (p != NULL) { |
| ERR_raise(ERR_LIB_PROV, ERR_R_UNSUPPORTED); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int dh_gen_set_params(void *genctx, const OSSL_PARAM params[]) |
| { |
| struct dh_gen_ctx *gctx = genctx; |
| const OSSL_PARAM *p; |
| |
| if (!dh_gen_common_set_params(genctx, params)) |
| return 0; |
| |
| p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_GENERATOR); |
| if (p != NULL && !OSSL_PARAM_get_int(p, &gctx->generator)) |
| return 0; |
| |
| /* Parameters that are not allowed for DH */ |
| if (OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_GINDEX) != NULL |
| || OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_PCOUNTER) != NULL |
| || OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_H) != NULL |
| || OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_SEED) != NULL |
| || OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_QBITS) != NULL |
| || OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_FFC_DIGEST) != NULL |
| || OSSL_PARAM_locate_const(params, |
| OSSL_PKEY_PARAM_FFC_DIGEST_PROPS) != NULL) { |
| ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int dh_gencb(int p, int n, BN_GENCB *cb) |
| { |
| struct dh_gen_ctx *gctx = BN_GENCB_get_arg(cb); |
| OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END }; |
| |
| params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p); |
| params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n); |
| |
| return gctx->cb(params, gctx->cbarg); |
| } |
| |
| static void *dh_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg) |
| { |
| int ret = 0; |
| struct dh_gen_ctx *gctx = genctx; |
| DH *dh = NULL; |
| BN_GENCB *gencb = NULL; |
| FFC_PARAMS *ffc; |
| |
| if (!ossl_prov_is_running() || gctx == NULL) |
| return NULL; |
| |
| /* |
| * If a group name is selected then the type is group regardless of what the |
| * the user selected. This overrides rather than errors for backwards |
| * compatibility. |
| */ |
| if (gctx->group_nid != NID_undef) |
| gctx->gen_type = DH_PARAMGEN_TYPE_GROUP; |
| |
| /* For parameter generation - If there is a group name just create it */ |
| if (gctx->gen_type == DH_PARAMGEN_TYPE_GROUP |
| && gctx->ffc_params == NULL) { |
| /* Select a named group if there is not one already */ |
| if (gctx->group_nid == NID_undef) |
| gctx->group_nid = ossl_dh_get_named_group_uid_from_size(gctx->pbits); |
| if (gctx->group_nid == NID_undef) |
| return NULL; |
| dh = ossl_dh_new_by_nid_ex(gctx->libctx, gctx->group_nid); |
| if (dh == NULL) |
| return NULL; |
| ffc = ossl_dh_get0_params(dh); |
| } else { |
| dh = ossl_dh_new_ex(gctx->libctx); |
| if (dh == NULL) |
| return NULL; |
| ffc = ossl_dh_get0_params(dh); |
| |
| /* Copy the template value if one was passed */ |
| if (gctx->ffc_params != NULL |
| && !ossl_ffc_params_copy(ffc, gctx->ffc_params)) |
| goto end; |
| |
| if (!ossl_ffc_params_set_seed(ffc, gctx->seed, gctx->seedlen)) |
| goto end; |
| if (gctx->gindex != -1) { |
| ossl_ffc_params_set_gindex(ffc, gctx->gindex); |
| if (gctx->pcounter != -1) |
| ossl_ffc_params_set_pcounter(ffc, gctx->pcounter); |
| } else if (gctx->hindex != 0) { |
| ossl_ffc_params_set_h(ffc, gctx->hindex); |
| } |
| if (gctx->mdname != NULL) { |
| if (!ossl_ffc_set_digest(ffc, gctx->mdname, gctx->mdprops)) |
| goto end; |
| } |
| gctx->cb = osslcb; |
| gctx->cbarg = cbarg; |
| gencb = BN_GENCB_new(); |
| if (gencb != NULL) |
| BN_GENCB_set(gencb, dh_gencb, genctx); |
| |
| if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { |
| /* |
| * NOTE: The old safe prime generator code is not used in fips mode, |
| * (i.e internally it ignores the generator and chooses a named |
| * group based on pbits. |
| */ |
| if (gctx->gen_type == DH_PARAMGEN_TYPE_GENERATOR) |
| ret = DH_generate_parameters_ex(dh, gctx->pbits, |
| gctx->generator, gencb); |
| else |
| ret = ossl_dh_generate_ffc_parameters(dh, gctx->gen_type, |
| gctx->pbits, gctx->qbits, |
| gencb); |
| if (ret <= 0) |
| goto end; |
| } |
| } |
| |
| if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| if (ffc->p == NULL || ffc->g == NULL) |
| goto end; |
| if (gctx->priv_len > 0) |
| DH_set_length(dh, (long)gctx->priv_len); |
| ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY, |
| gctx->gen_type == DH_PARAMGEN_TYPE_FIPS_186_2); |
| if (DH_generate_key(dh) <= 0) |
| goto end; |
| } |
| DH_clear_flags(dh, DH_FLAG_TYPE_MASK); |
| DH_set_flags(dh, gctx->dh_type); |
| |
| ret = 1; |
| end: |
| if (ret <= 0) { |
| DH_free(dh); |
| dh = NULL; |
| } |
| BN_GENCB_free(gencb); |
| return dh; |
| } |
| |
| static void dh_gen_cleanup(void *genctx) |
| { |
| struct dh_gen_ctx *gctx = genctx; |
| |
| if (gctx == NULL) |
| return; |
| |
| OPENSSL_free(gctx->mdname); |
| OPENSSL_free(gctx->mdprops); |
| OPENSSL_clear_free(gctx->seed, gctx->seedlen); |
| OPENSSL_free(gctx); |
| } |
| |
| static void *dh_load(const void *reference, size_t reference_sz) |
| { |
| DH *dh = NULL; |
| |
| if (ossl_prov_is_running() && reference_sz == sizeof(dh)) { |
| /* The contents of the reference is the address to our object */ |
| dh = *(DH **)reference; |
| /* We grabbed, so we detach it */ |
| *(DH **)reference = NULL; |
| return dh; |
| } |
| return NULL; |
| } |
| |
| static void *dh_dup(const void *keydata_from, int selection) |
| { |
| if (ossl_prov_is_running()) |
| return ossl_dh_dup(keydata_from, selection); |
| return NULL; |
| } |
| |
| const OSSL_DISPATCH ossl_dh_keymgmt_functions[] = { |
| { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dh_newdata }, |
| { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dh_gen_init }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dh_gen_set_template }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dh_gen_set_params }, |
| { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS, |
| (void (*)(void))dh_gen_settable_params }, |
| { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dh_gen }, |
| { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dh_gen_cleanup }, |
| { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dh_load }, |
| { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dh_freedata }, |
| { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dh_get_params }, |
| { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dh_gettable_params }, |
| { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))dh_set_params }, |
| { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))dh_settable_params }, |
| { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dh_has }, |
| { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dh_match }, |
| { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dh_validate }, |
| { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dh_import }, |
| { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dh_import_types }, |
| { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dh_export }, |
| { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dh_export_types }, |
| { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dh_dup }, |
| { 0, NULL } |
| }; |
| |
| /* For any DH key, we use the "DH" algorithms regardless of sub-type. */ |
| static const char *dhx_query_operation_name(int operation_id) |
| { |
| return "DH"; |
| } |
| |
| const OSSL_DISPATCH ossl_dhx_keymgmt_functions[] = { |
| { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dhx_newdata }, |
| { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dhx_gen_init }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dh_gen_set_template }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dhx_gen_set_params }, |
| { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS, |
| (void (*)(void))dhx_gen_settable_params }, |
| { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dh_gen }, |
| { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dh_gen_cleanup }, |
| { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dh_load }, |
| { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dh_freedata }, |
| { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dh_get_params }, |
| { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dh_gettable_params }, |
| { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*) (void))dh_set_params }, |
| { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))dh_settable_params }, |
| { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dh_has }, |
| { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dh_match }, |
| { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dh_validate }, |
| { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dh_import }, |
| { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dh_import_types }, |
| { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dh_export }, |
| { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dh_export_types }, |
| { OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME, |
| (void (*)(void))dhx_query_operation_name }, |
| { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dh_dup }, |
| { 0, NULL } |
| }; |
