mirror of
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110bff618b
The catalyst for this is the difficult of passing BNs through the other OSSL_PARAM APIs. Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com> (Merged from https://github.com/openssl/openssl/pull/11390)
481 lines
15 KiB
C
481 lines
15 KiB
C
/*
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* Copyright 2019 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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/*
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* RSA low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include <openssl/core_numbers.h>
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#include <openssl/core_names.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/rsa.h>
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#include <openssl/evp.h>
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#include <openssl/params.h>
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#include <openssl/types.h>
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#include "openssl/param_build.h"
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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#include "prov/provider_ctx.h"
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#include "crypto/rsa.h"
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static OSSL_OP_keymgmt_new_fn rsa_newdata;
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static OSSL_OP_keymgmt_gen_init_fn rsa_gen_init;
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static OSSL_OP_keymgmt_gen_set_params_fn rsa_gen_set_params;
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static OSSL_OP_keymgmt_gen_settable_params_fn rsa_gen_settable_params;
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static OSSL_OP_keymgmt_gen_fn rsa_gen;
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static OSSL_OP_keymgmt_gen_cleanup_fn rsa_gen_cleanup;
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static OSSL_OP_keymgmt_free_fn rsa_freedata;
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static OSSL_OP_keymgmt_get_params_fn rsa_get_params;
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static OSSL_OP_keymgmt_gettable_params_fn rsa_gettable_params;
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static OSSL_OP_keymgmt_has_fn rsa_has;
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static OSSL_OP_keymgmt_match_fn rsa_match;
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static OSSL_OP_keymgmt_validate_fn rsa_validate;
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static OSSL_OP_keymgmt_import_fn rsa_import;
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static OSSL_OP_keymgmt_import_types_fn rsa_import_types;
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static OSSL_OP_keymgmt_export_fn rsa_export;
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static OSSL_OP_keymgmt_export_types_fn rsa_export_types;
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#define RSA_DEFAULT_MD "SHA256"
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#define RSA_POSSIBLE_SELECTIONS \
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(OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS)
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DEFINE_STACK_OF(BIGNUM)
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DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
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static int export_numbers(OSSL_PARAM_BLD *tmpl, const char *key,
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STACK_OF(BIGNUM_const) *numbers)
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{
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int i, nnum;
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if (numbers == NULL)
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return 0;
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nnum = sk_BIGNUM_const_num(numbers);
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for (i = 0; i < nnum; i++) {
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if (!OSSL_PARAM_BLD_push_BN(tmpl, key,
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sk_BIGNUM_const_value(numbers, i)))
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return 0;
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}
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return 1;
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}
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static int key_to_params(RSA *rsa, OSSL_PARAM_BLD *tmpl)
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{
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int ret = 0;
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const BIGNUM *rsa_d = NULL, *rsa_n = NULL, *rsa_e = NULL;
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STACK_OF(BIGNUM_const) *factors = sk_BIGNUM_const_new_null();
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STACK_OF(BIGNUM_const) *exps = sk_BIGNUM_const_new_null();
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STACK_OF(BIGNUM_const) *coeffs = sk_BIGNUM_const_new_null();
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if (rsa == NULL || factors == NULL || exps == NULL || coeffs == NULL)
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goto err;
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RSA_get0_key(rsa, &rsa_n, &rsa_e, &rsa_d);
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rsa_get0_all_params(rsa, factors, exps, coeffs);
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if (rsa_n != NULL
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&& !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_RSA_N, rsa_n))
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goto err;
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if (rsa_e != NULL
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&& !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_RSA_E, rsa_e))
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goto err;
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if (rsa_d != NULL
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&& !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_RSA_D, rsa_d))
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goto err;
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if (!export_numbers(tmpl, OSSL_PKEY_PARAM_RSA_FACTOR, factors)
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|| !export_numbers(tmpl, OSSL_PKEY_PARAM_RSA_EXPONENT, exps)
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|| !export_numbers(tmpl, OSSL_PKEY_PARAM_RSA_COEFFICIENT, coeffs))
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goto err;
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ret = 1;
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err:
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sk_BIGNUM_const_free(factors);
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sk_BIGNUM_const_free(exps);
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sk_BIGNUM_const_free(coeffs);
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return ret;
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}
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static void *rsa_newdata(void *provctx)
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{
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OPENSSL_CTX *libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
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return rsa_new_with_ctx(libctx);
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}
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static void rsa_freedata(void *keydata)
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{
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RSA_free(keydata);
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}
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static int rsa_has(void *keydata, int selection)
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{
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RSA *rsa = keydata;
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int ok = 0;
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if (rsa != NULL) {
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if ((selection & RSA_POSSIBLE_SELECTIONS) != 0)
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ok = 1;
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if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
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ok = ok && 0; /* This will change with PSS and OAEP */
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
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ok = ok && (RSA_get0_e(rsa) != NULL);
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
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ok = ok && (RSA_get0_n(rsa) != NULL);
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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ok = ok && (RSA_get0_d(rsa) != NULL);
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}
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return ok;
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}
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static int rsa_match(const void *keydata1, const void *keydata2, int selection)
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{
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const RSA *rsa1 = keydata1;
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const RSA *rsa2 = keydata2;
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int ok = 1;
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/* There is always an |e| */
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ok = ok && BN_cmp(RSA_get0_e(rsa1), RSA_get0_e(rsa2)) == 0;
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
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ok = ok && BN_cmp(RSA_get0_n(rsa1), RSA_get0_n(rsa2)) == 0;
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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ok = ok && BN_cmp(RSA_get0_d(rsa1), RSA_get0_d(rsa2)) == 0;
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return ok;
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}
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static int rsa_import(void *keydata, int selection, const OSSL_PARAM params[])
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{
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RSA *rsa = keydata;
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int ok = 1;
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if (rsa == NULL)
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return 0;
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/* TODO(3.0) PSS and OAEP should bring on parameters */
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
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ok = ok && rsa_fromdata(rsa, params);
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return ok;
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}
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static int rsa_export(void *keydata, int selection,
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OSSL_CALLBACK *param_callback, void *cbarg)
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{
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RSA *rsa = keydata;
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OSSL_PARAM_BLD tmpl;
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OSSL_PARAM *params = NULL;
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int ok = 1;
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if (rsa == NULL)
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return 0;
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/* TODO(3.0) PSS and OAEP should bring on parameters */
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OSSL_PARAM_BLD_init(&tmpl);
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
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ok = ok && key_to_params(rsa, &tmpl);
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if (!ok
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|| (params = OSSL_PARAM_BLD_to_param(&tmpl)) == NULL)
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return 0;
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ok = param_callback(params, cbarg);
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OSSL_PARAM_BLD_free(params);
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return ok;
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}
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/*
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* This provider can export everything in an RSA key, so we use the exact
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* same type description for export as for import. Other providers might
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* choose to import full keys, but only export the public parts, and will
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* therefore have the importkey_types and importkey_types functions return
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* different arrays.
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*/
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static const OSSL_PARAM rsa_key_types[] = {
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_N, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_E, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_D, NULL, 0),
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/* We tolerate up to 10 factors... */
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_FACTOR, NULL, 0),
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/* ..., up to 10 CRT exponents... */
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_EXPONENT, NULL, 0),
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/* ..., and up to 9 CRT coefficients */
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_COEFFICIENT, NULL, 0),
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};
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/*
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* We lied about the amount of factors, exponents and coefficients, the
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* export and import functions can really deal with an infinite amount
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* of these numbers. However, RSA keys with too many primes are futile,
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* so we at least pretend to have some limits.
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*/
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static const OSSL_PARAM *rsa_imexport_types(int selection)
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{
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
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return rsa_key_types;
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return NULL;
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}
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static const OSSL_PARAM *rsa_import_types(int selection)
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{
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return rsa_imexport_types(selection);
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}
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static const OSSL_PARAM *rsa_export_types(int selection)
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{
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return rsa_imexport_types(selection);
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}
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static int rsa_get_params(void *key, OSSL_PARAM params[])
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{
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RSA *rsa = key;
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OSSL_PARAM *p;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
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&& !OSSL_PARAM_set_int(p, RSA_bits(rsa)))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
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&& !OSSL_PARAM_set_int(p, RSA_security_bits(rsa)))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
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&& !OSSL_PARAM_set_int(p, RSA_size(rsa)))
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return 0;
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# if 0 /* TODO(3.0): PSS support pending */
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if ((p = OSSL_PARAM_locate(params,
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OSSL_PKEY_PARAM_MANDATORY_DIGEST)) != NULL
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&& RSA_get0_pss_params(rsa) != NULL) {
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const EVP_MD *md, *mgf1md;
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int min_saltlen;
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if (!rsa_pss_get_param(RSA_get0_pss_params(rsa),
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&md, &mgf1md, &min_saltlen)) {
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ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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if (!OSSL_PARAM_set_utf8_string(p, EVP_MD_name(md)))
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return 0;
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}
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#endif
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
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/* TODO(3.0): PSS support pending */
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#if 0
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&& RSA_get0_pss_params(rsa) == NULL
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#endif
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) {
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if (!OSSL_PARAM_set_utf8_string(p, RSA_DEFAULT_MD))
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return 0;
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}
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return 1;
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}
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static const OSSL_PARAM rsa_params[] = {
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OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
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OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
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OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
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OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *rsa_gettable_params(void)
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{
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return rsa_params;
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}
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static int rsa_validate(void *keydata, int selection)
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{
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RSA *rsa = keydata;
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int ok = 0;
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if ((selection & RSA_POSSIBLE_SELECTIONS) != 0)
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ok = 1;
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/* If the whole key is selected, we do a pairwise validation */
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
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== OSSL_KEYMGMT_SELECT_KEYPAIR) {
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ok = ok && rsa_validate_pairwise(rsa);
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} else {
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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ok = ok && rsa_validate_private(rsa);
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
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ok = ok && rsa_validate_public(rsa);
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}
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return ok;
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}
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struct rsa_gen_ctx {
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OPENSSL_CTX *libctx;
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size_t nbits;
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BIGNUM *pub_exp;
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size_t primes;
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/* For generation callback */
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OSSL_CALLBACK *cb;
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void *cbarg;
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};
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static int rsa_gencb(int p, int n, BN_GENCB *cb)
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{
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struct rsa_gen_ctx *gctx = BN_GENCB_get_arg(cb);
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OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
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params[0] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_POTENTIAL, &p);
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params[1] = OSSL_PARAM_construct_int(OSSL_GEN_PARAM_ITERATION, &n);
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return gctx->cb(params, gctx->cbarg);
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}
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static void *rsa_gen_init(void *provctx, int selection)
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{
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OPENSSL_CTX *libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
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struct rsa_gen_ctx *gctx = NULL;
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
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return NULL;
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if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
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gctx->libctx = libctx;
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if ((gctx->pub_exp = BN_new()) == NULL
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|| !BN_set_word(gctx->pub_exp, RSA_F4)) {
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BN_free(gctx->pub_exp);
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gctx = NULL;
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} else {
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gctx->nbits = 2048;
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gctx->primes = RSA_DEFAULT_PRIME_NUM;
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}
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}
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return gctx;
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}
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static int rsa_gen_set_params(void *genctx, const OSSL_PARAM params[])
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{
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struct rsa_gen_ctx *gctx = genctx;
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const OSSL_PARAM *p;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_BITS)) != NULL
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&& !OSSL_PARAM_get_size_t(p, &gctx->nbits))
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return 0;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_PRIMES)) != NULL
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&& !OSSL_PARAM_get_size_t(p, &gctx->primes))
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return 0;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_E)) != NULL
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&& !OSSL_PARAM_get_BN(p, &gctx->pub_exp))
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return 0;
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return 1;
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}
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static const OSSL_PARAM *rsa_gen_settable_params(void *provctx)
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{
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static OSSL_PARAM settable[] = {
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OSSL_PARAM_size_t(OSSL_PKEY_PARAM_RSA_BITS, NULL),
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OSSL_PARAM_size_t(OSSL_PKEY_PARAM_RSA_PRIMES, NULL),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_RSA_E, NULL, 0),
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OSSL_PARAM_END
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};
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return settable;
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}
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static void *rsa_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
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{
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struct rsa_gen_ctx *gctx = genctx;
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RSA *rsa = NULL;
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BN_GENCB *gencb = NULL;
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if (gctx == NULL
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|| (rsa = rsa_new_with_ctx(gctx->libctx)) == NULL)
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return NULL;
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|
|
gctx->cb = osslcb;
|
|
gctx->cbarg = cbarg;
|
|
gencb = BN_GENCB_new();
|
|
if (gencb != NULL)
|
|
BN_GENCB_set(gencb, rsa_gencb, genctx);
|
|
|
|
if (!RSA_generate_multi_prime_key(rsa, (int)gctx->nbits, (int)gctx->primes,
|
|
gctx->pub_exp, gencb)) {
|
|
RSA_free(rsa);
|
|
rsa = NULL;
|
|
}
|
|
|
|
BN_GENCB_free(gencb);
|
|
|
|
return rsa;
|
|
}
|
|
|
|
static void rsa_gen_cleanup(void *genctx)
|
|
{
|
|
struct rsa_gen_ctx *gctx = genctx;
|
|
|
|
if (gctx == NULL)
|
|
return;
|
|
|
|
BN_clear_free(gctx->pub_exp);
|
|
OPENSSL_free(gctx);
|
|
}
|
|
|
|
const OSSL_DISPATCH rsa_keymgmt_functions[] = {
|
|
{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))rsa_newdata },
|
|
{ OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))rsa_gen_init },
|
|
{ OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS,
|
|
(void (*)(void))rsa_gen_set_params },
|
|
{ OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
|
|
(void (*)(void))rsa_gen_settable_params },
|
|
{ OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))rsa_gen },
|
|
{ OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))rsa_gen_cleanup },
|
|
{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))rsa_freedata },
|
|
{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))rsa_get_params },
|
|
{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))rsa_gettable_params },
|
|
{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))rsa_has },
|
|
{ OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))rsa_match },
|
|
{ OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))rsa_validate },
|
|
{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))rsa_import },
|
|
{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))rsa_import_types },
|
|
{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))rsa_export },
|
|
{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))rsa_export_types },
|
|
{ 0, NULL }
|
|
};
|