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ebad0b0beb
Before the addition of this function, it was impossible to read the symmetric key from an EVP_PKEY_HMAC type EVP_PKEY. Reviewed-by: Emilia Käsper <emilia@openssl.org> Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/1217)
461 lines
11 KiB
C
461 lines
11 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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 <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include <openssl/rsa.h>
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#include <openssl/dsa.h>
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#include <openssl/dh.h>
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#include <openssl/engine.h>
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#include "internal/asn1_int.h"
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#include "internal/evp_int.h"
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static void EVP_PKEY_free_it(EVP_PKEY *x);
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int EVP_PKEY_bits(EVP_PKEY *pkey)
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{
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if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
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return pkey->ameth->pkey_bits(pkey);
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return 0;
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}
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int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
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{
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if (pkey == NULL)
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return 0;
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if (!pkey->ameth || !pkey->ameth->pkey_security_bits)
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return -2;
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return pkey->ameth->pkey_security_bits(pkey);
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}
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int EVP_PKEY_size(EVP_PKEY *pkey)
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{
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if (pkey && pkey->ameth && pkey->ameth->pkey_size)
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return pkey->ameth->pkey_size(pkey);
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return 0;
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}
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int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
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{
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#ifndef OPENSSL_NO_DSA
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if (pkey->type == EVP_PKEY_DSA) {
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int ret = pkey->save_parameters;
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if (mode >= 0)
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pkey->save_parameters = mode;
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return (ret);
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}
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#endif
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#ifndef OPENSSL_NO_EC
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if (pkey->type == EVP_PKEY_EC) {
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int ret = pkey->save_parameters;
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if (mode >= 0)
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pkey->save_parameters = mode;
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return (ret);
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}
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#endif
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return (0);
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}
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int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
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{
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if (to->type == EVP_PKEY_NONE) {
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if (EVP_PKEY_set_type(to, from->type) == 0)
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return 0;
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} else if (to->type != from->type) {
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EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
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goto err;
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}
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if (EVP_PKEY_missing_parameters(from)) {
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EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
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goto err;
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}
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if (!EVP_PKEY_missing_parameters(to)) {
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if (EVP_PKEY_cmp_parameters(to, from) == 1)
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return 1;
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EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
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return 0;
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}
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if (from->ameth && from->ameth->param_copy)
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return from->ameth->param_copy(to, from);
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err:
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return 0;
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}
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int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
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{
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if (pkey->ameth && pkey->ameth->param_missing)
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return pkey->ameth->param_missing(pkey);
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return 0;
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}
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int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
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{
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if (a->type != b->type)
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return -1;
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if (a->ameth && a->ameth->param_cmp)
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return a->ameth->param_cmp(a, b);
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return -2;
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}
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int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
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{
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if (a->type != b->type)
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return -1;
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if (a->ameth) {
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int ret;
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/* Compare parameters if the algorithm has them */
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if (a->ameth->param_cmp) {
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ret = a->ameth->param_cmp(a, b);
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if (ret <= 0)
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return ret;
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}
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if (a->ameth->pub_cmp)
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return a->ameth->pub_cmp(a, b);
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}
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return -2;
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}
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EVP_PKEY *EVP_PKEY_new(void)
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{
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EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
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if (ret == NULL) {
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EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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ret->type = EVP_PKEY_NONE;
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ret->save_type = EVP_PKEY_NONE;
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ret->references = 1;
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ret->save_parameters = 1;
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ret->lock = CRYPTO_THREAD_lock_new();
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if (ret->lock == NULL) {
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EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
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OPENSSL_free(ret);
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return NULL;
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}
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return ret;
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}
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int EVP_PKEY_up_ref(EVP_PKEY *pkey)
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{
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int i;
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if (CRYPTO_atomic_add(&pkey->references, 1, &i, pkey->lock) <= 0)
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return 0;
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REF_PRINT_COUNT("EVP_PKEY", pkey);
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REF_ASSERT_ISNT(i < 2);
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return ((i > 1) ? 1 : 0);
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}
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/*
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* Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
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* is NULL just return 1 or 0 if the algorithm exists.
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*/
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static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len)
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{
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const EVP_PKEY_ASN1_METHOD *ameth;
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ENGINE *e = NULL;
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if (pkey) {
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if (pkey->pkey.ptr)
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EVP_PKEY_free_it(pkey);
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/*
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* If key type matches and a method exists then this lookup has
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* succeeded once so just indicate success.
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*/
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if ((type == pkey->save_type) && pkey->ameth)
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return 1;
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#ifndef OPENSSL_NO_ENGINE
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/* If we have an ENGINE release it */
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ENGINE_finish(pkey->engine);
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pkey->engine = NULL;
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#endif
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}
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if (str)
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ameth = EVP_PKEY_asn1_find_str(&e, str, len);
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else
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ameth = EVP_PKEY_asn1_find(&e, type);
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#ifndef OPENSSL_NO_ENGINE
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if (pkey == NULL)
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ENGINE_finish(e);
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#endif
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if (ameth == NULL) {
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EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
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return 0;
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}
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if (pkey) {
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pkey->ameth = ameth;
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pkey->engine = e;
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pkey->type = pkey->ameth->pkey_id;
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pkey->save_type = type;
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}
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return 1;
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}
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int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
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{
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return pkey_set_type(pkey, type, NULL, -1);
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}
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int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
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{
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return pkey_set_type(pkey, EVP_PKEY_NONE, str, len);
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}
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int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
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{
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if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
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return 0;
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pkey->pkey.ptr = key;
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return (key != NULL);
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}
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void *EVP_PKEY_get0(const EVP_PKEY *pkey)
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{
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return pkey->pkey.ptr;
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}
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const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
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{
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ASN1_OCTET_STRING *os = NULL;
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if (pkey->type != EVP_PKEY_HMAC) {
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EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
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return NULL;
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}
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os = EVP_PKEY_get0(pkey);
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*len = os->length;
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return os->data;
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}
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#ifndef OPENSSL_NO_RSA
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int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
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{
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int ret = EVP_PKEY_assign_RSA(pkey, key);
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if (ret)
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RSA_up_ref(key);
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return ret;
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}
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RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey)
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{
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if (pkey->type != EVP_PKEY_RSA) {
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EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
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return NULL;
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}
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return pkey->pkey.rsa;
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}
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RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
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{
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RSA *ret = EVP_PKEY_get0_RSA(pkey);
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if (ret != NULL)
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RSA_up_ref(ret);
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return ret;
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}
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#endif
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#ifndef OPENSSL_NO_DSA
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int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
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{
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int ret = EVP_PKEY_assign_DSA(pkey, key);
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if (ret)
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DSA_up_ref(key);
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return ret;
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}
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DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey)
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{
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if (pkey->type != EVP_PKEY_DSA) {
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EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
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return NULL;
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}
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return pkey->pkey.dsa;
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}
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DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
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{
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DSA *ret = EVP_PKEY_get0_DSA(pkey);
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if (ret != NULL)
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DSA_up_ref(ret);
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return ret;
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}
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#endif
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#ifndef OPENSSL_NO_EC
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int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
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{
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int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
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if (ret)
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EC_KEY_up_ref(key);
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return ret;
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}
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EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
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{
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if (pkey->type != EVP_PKEY_EC) {
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EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
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return NULL;
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}
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return pkey->pkey.ec;
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}
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EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
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{
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EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
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if (ret != NULL)
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EC_KEY_up_ref(ret);
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return ret;
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}
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#endif
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#ifndef OPENSSL_NO_DH
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int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
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{
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int ret = EVP_PKEY_assign_DH(pkey, key);
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if (ret)
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DH_up_ref(key);
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return ret;
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}
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DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey)
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{
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if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
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EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
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return NULL;
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}
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return pkey->pkey.dh;
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}
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DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
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{
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DH *ret = EVP_PKEY_get0_DH(pkey);
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if (ret != NULL)
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DH_up_ref(ret);
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return ret;
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}
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#endif
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int EVP_PKEY_type(int type)
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{
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int ret;
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const EVP_PKEY_ASN1_METHOD *ameth;
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ENGINE *e;
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ameth = EVP_PKEY_asn1_find(&e, type);
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if (ameth)
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ret = ameth->pkey_id;
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else
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ret = NID_undef;
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(e);
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#endif
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return ret;
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}
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int EVP_PKEY_id(const EVP_PKEY *pkey)
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{
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return pkey->type;
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}
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int EVP_PKEY_base_id(const EVP_PKEY *pkey)
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{
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return EVP_PKEY_type(pkey->type);
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}
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void EVP_PKEY_free(EVP_PKEY *x)
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{
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int i;
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if (x == NULL)
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return;
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CRYPTO_atomic_add(&x->references, -1, &i, x->lock);
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REF_PRINT_COUNT("EVP_PKEY", x);
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if (i > 0)
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return;
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REF_ASSERT_ISNT(i < 0);
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EVP_PKEY_free_it(x);
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sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
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OPENSSL_free(x);
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}
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static void EVP_PKEY_free_it(EVP_PKEY *x)
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{
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/* internal function; x is never NULL */
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if (x->ameth && x->ameth->pkey_free) {
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x->ameth->pkey_free(x);
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x->pkey.ptr = NULL;
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}
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(x->engine);
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x->engine = NULL;
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#endif
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CRYPTO_THREAD_lock_free(x->lock);
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}
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static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
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const char *kstr)
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{
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BIO_indent(out, indent, 128);
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BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
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kstr, OBJ_nid2ln(pkey->type));
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return 1;
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}
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int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
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int indent, ASN1_PCTX *pctx)
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{
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if (pkey->ameth && pkey->ameth->pub_print)
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return pkey->ameth->pub_print(out, pkey, indent, pctx);
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return unsup_alg(out, pkey, indent, "Public Key");
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}
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int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
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int indent, ASN1_PCTX *pctx)
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{
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if (pkey->ameth && pkey->ameth->priv_print)
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return pkey->ameth->priv_print(out, pkey, indent, pctx);
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return unsup_alg(out, pkey, indent, "Private Key");
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}
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int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
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int indent, ASN1_PCTX *pctx)
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{
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if (pkey->ameth && pkey->ameth->param_print)
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return pkey->ameth->param_print(out, pkey, indent, pctx);
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return unsup_alg(out, pkey, indent, "Parameters");
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}
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int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
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{
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if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
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return -2;
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return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID,
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0, pnid);
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}
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