| /* |
| * 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 |
| */ |
| |
| /* |
| * DSA low level APIs are deprecated for public use, but still ok for |
| * internal use. |
| */ |
| #include "internal/deprecated.h" |
| |
| #include <openssl/core_dispatch.h> |
| #include <openssl/core_names.h> |
| #include <openssl/bn.h> |
| #include <openssl/err.h> |
| #include "prov/providercommon.h" |
| #include "prov/implementations.h" |
| #include "prov/provider_ctx.h" |
| #include "crypto/dsa.h" |
| #include "internal/sizes.h" |
| #include "internal/nelem.h" |
| #include "internal/param_build_set.h" |
| |
| static OSSL_FUNC_keymgmt_new_fn dsa_newdata; |
| static OSSL_FUNC_keymgmt_free_fn dsa_freedata; |
| static OSSL_FUNC_keymgmt_gen_init_fn dsa_gen_init; |
| static OSSL_FUNC_keymgmt_gen_set_template_fn dsa_gen_set_template; |
| static OSSL_FUNC_keymgmt_gen_set_params_fn dsa_gen_set_params; |
| static OSSL_FUNC_keymgmt_gen_settable_params_fn dsa_gen_settable_params; |
| static OSSL_FUNC_keymgmt_gen_fn dsa_gen; |
| static OSSL_FUNC_keymgmt_gen_cleanup_fn dsa_gen_cleanup; |
| static OSSL_FUNC_keymgmt_load_fn dsa_load; |
| static OSSL_FUNC_keymgmt_get_params_fn dsa_get_params; |
| static OSSL_FUNC_keymgmt_gettable_params_fn dsa_gettable_params; |
| static OSSL_FUNC_keymgmt_has_fn dsa_has; |
| static OSSL_FUNC_keymgmt_match_fn dsa_match; |
| static OSSL_FUNC_keymgmt_validate_fn dsa_validate; |
| static OSSL_FUNC_keymgmt_import_fn dsa_import; |
| static OSSL_FUNC_keymgmt_import_types_fn dsa_import_types; |
| static OSSL_FUNC_keymgmt_export_fn dsa_export; |
| static OSSL_FUNC_keymgmt_export_types_fn dsa_export_types; |
| static OSSL_FUNC_keymgmt_dup_fn dsa_dup; |
| |
| #define DSA_DEFAULT_MD "SHA256" |
| #define DSA_POSSIBLE_SELECTIONS \ |
| (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) |
| |
| struct dsa_gen_ctx { |
| OSSL_LIB_CTX *libctx; |
| |
| FFC_PARAMS *ffc_params; |
| int selection; |
| /* All these parameters are used for parameter generation only */ |
| 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; /* DSA_PARAMGEN_TYPE_FIPS_186_2 or DSA_PARAMGEN_TYPE_FIPS_186_4 */ |
| int pcounter; |
| int hindex; |
| char *mdname; |
| char *mdprops; |
| OSSL_CALLBACK *cb; |
| void *cbarg; |
| }; |
| typedef struct dh_name2id_st{ |
| const char *name; |
| int id; |
| } DSA_GENTYPE_NAME2ID; |
| |
| static const DSA_GENTYPE_NAME2ID dsatype2id[]= |
| { |
| #ifdef FIPS_MODULE |
| { "default", DSA_PARAMGEN_TYPE_FIPS_186_4 }, |
| #else |
| { "default", DSA_PARAMGEN_TYPE_FIPS_DEFAULT }, |
| #endif |
| { "fips186_4", DSA_PARAMGEN_TYPE_FIPS_186_4 }, |
| { "fips186_2", DSA_PARAMGEN_TYPE_FIPS_186_2 }, |
| }; |
| |
| static int dsa_gen_type_name2id(const char *name) |
| { |
| size_t i; |
| |
| for (i = 0; i < OSSL_NELEM(dsatype2id); ++i) { |
| if (OPENSSL_strcasecmp(dsatype2id[i].name, name) == 0) |
| return dsatype2id[i].id; |
| } |
| return -1; |
| } |
| |
| static int dsa_key_todata(DSA *dsa, OSSL_PARAM_BLD *bld, OSSL_PARAM params[], |
| int include_private) |
| { |
| const BIGNUM *priv = NULL, *pub = NULL; |
| |
| if (dsa == NULL) |
| return 0; |
| |
| DSA_get0_key(dsa, &pub, &priv); |
| if (include_private |
| && priv != NULL |
| && !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PRIV_KEY, priv)) |
| return 0; |
| if (pub != NULL |
| && !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PUB_KEY, pub)) |
| return 0; |
| |
| return 1; |
| } |
| |
| static void *dsa_newdata(void *provctx) |
| { |
| if (!ossl_prov_is_running()) |
| return NULL; |
| return ossl_dsa_new(PROV_LIBCTX_OF(provctx)); |
| } |
| |
| static void dsa_freedata(void *keydata) |
| { |
| DSA_free(keydata); |
| } |
| |
| static int dsa_has(const void *keydata, int selection) |
| { |
| const DSA *dsa = keydata; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || dsa == NULL) |
| return 0; |
| if ((selection & DSA_POSSIBLE_SELECTIONS) == 0) |
| return 1; /* the selection is not missing */ |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) |
| ok = ok && (DSA_get0_pub_key(dsa) != NULL); |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) |
| ok = ok && (DSA_get0_priv_key(dsa) != NULL); |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) |
| ok = ok && (DSA_get0_p(dsa) != NULL && DSA_get0_g(dsa) != NULL); |
| return ok; |
| } |
| |
| static int dsa_match(const void *keydata1, const void *keydata2, int selection) |
| { |
| const DSA *dsa1 = keydata1; |
| const DSA *dsa2 = 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 = DSA_get0_pub_key(dsa1); |
| const BIGNUM *pb = DSA_get0_pub_key(dsa2); |
| |
| 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 = DSA_get0_priv_key(dsa1); |
| const BIGNUM *pb = DSA_get0_priv_key(dsa2); |
| |
| 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 *dsaparams1 = ossl_dsa_get0_params((DSA *)dsa1); |
| FFC_PARAMS *dsaparams2 = ossl_dsa_get0_params((DSA *)dsa2); |
| |
| ok = ok && ossl_ffc_params_cmp(dsaparams1, dsaparams2, 1); |
| } |
| return ok; |
| } |
| |
| static int dsa_import(void *keydata, int selection, const OSSL_PARAM params[]) |
| { |
| DSA *dsa = keydata; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || dsa == NULL) |
| return 0; |
| |
| if ((selection & DSA_POSSIBLE_SELECTIONS) == 0) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0) |
| ok = ok && ossl_dsa_ffc_params_fromdata(dsa, params); |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| int include_private = |
| selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0; |
| |
| ok = ok && ossl_dsa_key_fromdata(dsa, params, include_private); |
| } |
| |
| return ok; |
| } |
| |
| static int dsa_export(void *keydata, int selection, OSSL_CALLBACK *param_cb, |
| void *cbarg) |
| { |
| DSA *dsa = keydata; |
| OSSL_PARAM_BLD *tmpl; |
| OSSL_PARAM *params = NULL; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running() || dsa == NULL) |
| return 0; |
| |
| tmpl = OSSL_PARAM_BLD_new(); |
| if (tmpl == NULL) |
| return 0; |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0) |
| ok = ok && ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), tmpl, NULL); |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| int include_private = |
| selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0; |
| |
| ok = ok && dsa_key_todata(dsa, tmpl, NULL, include_private); |
| } |
| |
| if (!ok |
| || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) |
| goto err; |
| |
| ok = param_cb(params, cbarg); |
| OSSL_PARAM_free(params); |
| err: |
| OSSL_PARAM_BLD_free(tmpl); |
| return ok; |
| } |
| |
| /* IMEXPORT = IMPORT + EXPORT */ |
| |
| # define DSA_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_octet_string(OSSL_PKEY_PARAM_FFC_SEED, NULL, 0) |
| # define DSA_IMEXPORTABLE_PUBLIC_KEY \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0) |
| # define DSA_IMEXPORTABLE_PRIVATE_KEY \ |
| OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0) |
| static const OSSL_PARAM dsa_all_types[] = { |
| DSA_IMEXPORTABLE_PARAMETERS, |
| DSA_IMEXPORTABLE_PUBLIC_KEY, |
| DSA_IMEXPORTABLE_PRIVATE_KEY, |
| OSSL_PARAM_END |
| }; |
| static const OSSL_PARAM dsa_parameter_types[] = { |
| DSA_IMEXPORTABLE_PARAMETERS, |
| OSSL_PARAM_END |
| }; |
| static const OSSL_PARAM dsa_key_types[] = { |
| DSA_IMEXPORTABLE_PUBLIC_KEY, |
| DSA_IMEXPORTABLE_PRIVATE_KEY, |
| OSSL_PARAM_END |
| }; |
| static const OSSL_PARAM *dsa_types[] = { |
| NULL, /* Index 0 = none of them */ |
| dsa_parameter_types, /* Index 1 = parameter types */ |
| dsa_key_types, /* Index 2 = key types */ |
| dsa_all_types /* Index 3 = 1 + 2 */ |
| }; |
| |
| static const OSSL_PARAM *dsa_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 dsa_types[type_select]; |
| } |
| |
| static const OSSL_PARAM *dsa_import_types(int selection) |
| { |
| return dsa_imexport_types(selection); |
| } |
| |
| static const OSSL_PARAM *dsa_export_types(int selection) |
| { |
| return dsa_imexport_types(selection); |
| } |
| |
| static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[]) |
| { |
| DSA *dsa = key; |
| OSSL_PARAM *p; |
| |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL |
| && !OSSL_PARAM_set_int(p, DSA_bits(dsa))) |
| return 0; |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL |
| && !OSSL_PARAM_set_int(p, DSA_security_bits(dsa))) |
| return 0; |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL |
| && !OSSL_PARAM_set_int(p, DSA_size(dsa))) |
| return 0; |
| if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL |
| && !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD)) |
| return 0; |
| return ossl_ffc_params_todata(ossl_dsa_get0_params(dsa), NULL, params) |
| && dsa_key_todata(dsa, NULL, params, 1); |
| } |
| |
| static const OSSL_PARAM dsa_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_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0), |
| DSA_IMEXPORTABLE_PARAMETERS, |
| DSA_IMEXPORTABLE_PUBLIC_KEY, |
| DSA_IMEXPORTABLE_PRIVATE_KEY, |
| OSSL_PARAM_END |
| }; |
| |
| static const OSSL_PARAM *dsa_gettable_params(void *provctx) |
| { |
| return dsa_params; |
| } |
| |
| static int dsa_validate_domparams(const DSA *dsa, int checktype) |
| { |
| int status = 0; |
| |
| return ossl_dsa_check_params(dsa, checktype, &status); |
| } |
| |
| static int dsa_validate_public(const DSA *dsa) |
| { |
| int status = 0; |
| const BIGNUM *pub_key = NULL; |
| |
| DSA_get0_key(dsa, &pub_key, NULL); |
| if (pub_key == NULL) |
| return 0; |
| return ossl_dsa_check_pub_key(dsa, pub_key, &status); |
| } |
| |
| static int dsa_validate_private(const DSA *dsa) |
| { |
| int status = 0; |
| const BIGNUM *priv_key = NULL; |
| |
| DSA_get0_key(dsa, NULL, &priv_key); |
| if (priv_key == NULL) |
| return 0; |
| return ossl_dsa_check_priv_key(dsa, priv_key, &status); |
| } |
| |
| static int dsa_validate(const void *keydata, int selection, int checktype) |
| { |
| const DSA *dsa = keydata; |
| int ok = 1; |
| |
| if (!ossl_prov_is_running()) |
| return 0; |
| |
| if ((selection & DSA_POSSIBLE_SELECTIONS) == 0) |
| return 1; /* nothing to validate */ |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) |
| ok = ok && dsa_validate_domparams(dsa, checktype); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) |
| ok = ok && dsa_validate_public(dsa); |
| |
| if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) |
| ok = ok && dsa_validate_private(dsa); |
| |
| /* If the whole key is selected, we do a pairwise validation */ |
| if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) |
| == OSSL_KEYMGMT_SELECT_KEYPAIR) |
| ok = ok && ossl_dsa_check_pairwise(dsa); |
| return ok; |
| } |
| |
| static void *dsa_gen_init(void *provctx, int selection, |
| const OSSL_PARAM params[]) |
| { |
| OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(provctx); |
| struct dsa_gen_ctx *gctx = NULL; |
| |
| if (!ossl_prov_is_running() || (selection & DSA_POSSIBLE_SELECTIONS) == 0) |
| return NULL; |
| |
| if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) { |
| gctx->selection = selection; |
| gctx->libctx = libctx; |
| gctx->pbits = 2048; |
| gctx->qbits = 224; |
| #ifdef FIPS_MODULE |
| gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_186_4; |
| #else |
| gctx->gen_type = DSA_PARAMGEN_TYPE_FIPS_DEFAULT; |
| #endif |
| gctx->gindex = -1; |
| gctx->pcounter = -1; |
| gctx->hindex = 0; |
| } |
| if (!dsa_gen_set_params(gctx, params)) { |
| OPENSSL_free(gctx); |
| gctx = NULL; |
| } |
| return gctx; |
| } |
| |
| static int dsa_gen_set_template(void *genctx, void *templ) |
| { |
| struct dsa_gen_ctx *gctx = genctx; |
| DSA *dsa = templ; |
| |
| if (!ossl_prov_is_running() || gctx == NULL || dsa == NULL) |
| return 0; |
| gctx->ffc_params = ossl_dsa_get0_params(dsa); |
| return 1; |
| } |
| |
| static int dsa_set_gen_seed(struct dsa_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 dsa_gen_set_params(void *genctx, const OSSL_PARAM params[]) |
| { |
| struct dsa_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 = dsa_gen_type_name2id(p->data)) == -1)) { |
| ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT); |
| return 0; |
| } |
| } |
| 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 |
| || !dsa_set_gen_seed(gctx, p->data, p->data_size))) |
| 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; |
| 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; |
| } |
| return 1; |
| } |
| |
| static const OSSL_PARAM *dsa_gen_settable_params(ossl_unused void *genctx, |
| ossl_unused void *provctx) |
| { |
| static OSSL_PARAM settable[] = { |
| OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE, NULL, 0), |
| 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 settable; |
| } |
| |
| static int dsa_gencb(int p, int n, BN_GENCB *cb) |
| { |
| struct dsa_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 *dsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg) |
| { |
| struct dsa_gen_ctx *gctx = genctx; |
| DSA *dsa = NULL; |
| BN_GENCB *gencb = NULL; |
| int ret = 0; |
| FFC_PARAMS *ffc; |
| |
| if (!ossl_prov_is_running() || gctx == NULL) |
| return NULL; |
| dsa = ossl_dsa_new(gctx->libctx); |
| if (dsa == NULL) |
| return NULL; |
| |
| if (gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_DEFAULT) |
| gctx->gen_type = (gctx->pbits >= 2048 ? DSA_PARAMGEN_TYPE_FIPS_186_4 : |
| DSA_PARAMGEN_TYPE_FIPS_186_2); |
| |
| gctx->cb = osslcb; |
| gctx->cbarg = cbarg; |
| gencb = BN_GENCB_new(); |
| if (gencb != NULL) |
| BN_GENCB_set(gencb, dsa_gencb, genctx); |
| |
| ffc = ossl_dsa_get0_params(dsa); |
| /* Copy the template value if one was passed */ |
| if (gctx->ffc_params != NULL |
| && !ossl_ffc_params_copy(ffc, gctx->ffc_params)) |
| goto end; |
| |
| if (gctx->seed != NULL |
| && !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; |
| } |
| if ((gctx->selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) { |
| |
| if (ossl_dsa_generate_ffc_parameters(dsa, gctx->gen_type, |
| gctx->pbits, gctx->qbits, |
| gencb) <= 0) |
| goto end; |
| } |
| ossl_ffc_params_enable_flags(ffc, FFC_PARAM_FLAG_VALIDATE_LEGACY, |
| gctx->gen_type == DSA_PARAMGEN_TYPE_FIPS_186_2); |
| if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) { |
| if (ffc->p == NULL |
| || ffc->q == NULL |
| || ffc->g == NULL) |
| goto end; |
| if (DSA_generate_key(dsa) <= 0) |
| goto end; |
| } |
| ret = 1; |
| end: |
| if (ret <= 0) { |
| DSA_free(dsa); |
| dsa = NULL; |
| } |
| BN_GENCB_free(gencb); |
| return dsa; |
| } |
| |
| static void dsa_gen_cleanup(void *genctx) |
| { |
| struct dsa_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 *dsa_load(const void *reference, size_t reference_sz) |
| { |
| DSA *dsa = NULL; |
| |
| if (ossl_prov_is_running() && reference_sz == sizeof(dsa)) { |
| /* The contents of the reference is the address to our object */ |
| dsa = *(DSA **)reference; |
| /* We grabbed, so we detach it */ |
| *(DSA **)reference = NULL; |
| return dsa; |
| } |
| return NULL; |
| } |
| |
| static void *dsa_dup(const void *keydata_from, int selection) |
| { |
| if (ossl_prov_is_running()) |
| return ossl_dsa_dup(keydata_from, selection); |
| return NULL; |
| } |
| |
| const OSSL_DISPATCH ossl_dsa_keymgmt_functions[] = { |
| { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata }, |
| { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))dsa_gen_init }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE, (void (*)(void))dsa_gen_set_template }, |
| { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))dsa_gen_set_params }, |
| { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS, |
| (void (*)(void))dsa_gen_settable_params }, |
| { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))dsa_gen }, |
| { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))dsa_gen_cleanup }, |
| { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))dsa_load }, |
| { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata }, |
| { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dsa_get_params }, |
| { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dsa_gettable_params }, |
| { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has }, |
| { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match }, |
| { OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate }, |
| { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import }, |
| { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types }, |
| { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export }, |
| { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types }, |
| { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))dsa_dup }, |
| { 0, NULL } |
| }; |
