crypto/engine/eng_openssl.c - third_party/openssl - Git at Google

 /*
  * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved.
  * Copyright (c) 2002, Oracle and/or its affiliates. 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
  */

 /* We need to use some engine deprecated APIs */
 #define OPENSSL_SUPPRESS_DEPRECATED

 /*
  * RC4 and SHA-1 low level APIs and EVP _meth_ APISs are deprecated for public
  * use, but still ok for internal use.
  */
 #include "internal/deprecated.h"

 #include <stdio.h>
 #include <openssl/crypto.h>
 #include "internal/cryptlib.h"
 #include "crypto/engine.h"
 #include <openssl/pem.h>
 #include <openssl/evp.h>
 #include <openssl/rand.h>
 #include <openssl/rsa.h>
 #include <openssl/dsa.h>
 #include <openssl/dh.h>

 #include <openssl/hmac.h>
 #include <openssl/x509v3.h>

 /*
  * This testing gunk is implemented (and explained) lower down. It also
  * assumes the application explicitly calls "ENGINE_load_openssl()" because
  * this is no longer automatic in ENGINE_load_builtin_engines().
  */
 #define TEST_ENG_OPENSSL_RC4
 #ifndef OPENSSL_NO_STDIO
 # define TEST_ENG_OPENSSL_PKEY
 #endif
 /* #define TEST_ENG_OPENSSL_HMAC */
 /* #define TEST_ENG_OPENSSL_HMAC_INIT */
 /* #define TEST_ENG_OPENSSL_RC4_OTHERS */
 #ifndef OPENSSL_NO_STDIO
 # define TEST_ENG_OPENSSL_RC4_P_INIT
 #endif
 /* #define TEST_ENG_OPENSSL_RC4_P_CIPHER */
 #define TEST_ENG_OPENSSL_SHA
 /* #define TEST_ENG_OPENSSL_SHA_OTHERS */
 /* #define TEST_ENG_OPENSSL_SHA_P_INIT */
 /* #define TEST_ENG_OPENSSL_SHA_P_UPDATE */
 /* #define TEST_ENG_OPENSSL_SHA_P_FINAL */

 /* Now check what of those algorithms are actually enabled */
 #ifdef OPENSSL_NO_RC4
 # undef TEST_ENG_OPENSSL_RC4
 # undef TEST_ENG_OPENSSL_RC4_OTHERS
 # undef TEST_ENG_OPENSSL_RC4_P_INIT
 # undef TEST_ENG_OPENSSL_RC4_P_CIPHER
 #endif

 static int openssl_destroy(ENGINE *e);

 #ifdef TEST_ENG_OPENSSL_RC4
 static int openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
                            const int **nids, int nid);
 #endif
 #ifdef TEST_ENG_OPENSSL_SHA
 static int openssl_digests(ENGINE *e, const EVP_MD **digest,
                            const int **nids, int nid);
 #endif

 #ifdef TEST_ENG_OPENSSL_PKEY
 static EVP_PKEY *openssl_load_privkey(ENGINE *eng, const char *key_id,
                                       UI_METHOD *ui_method,
                                       void *callback_data);
 #endif

 #ifdef TEST_ENG_OPENSSL_HMAC
 static int ossl_register_hmac_meth(void);
 static int ossl_pkey_meths(ENGINE *e, EVP_PKEY_METHOD **pmeth,
                            const int **nids, int nid);
 #endif

 /* The constants used when creating the ENGINE */
 static const char *engine_openssl_id = "openssl";
 static const char *engine_openssl_name = "Software engine support";

 /*
  * This internal function is used by ENGINE_openssl() and possibly by the
  * "dynamic" ENGINE support too
  */
 static int bind_helper(ENGINE *e)
 {
     if (!ENGINE_set_id(e, engine_openssl_id)
         || !ENGINE_set_name(e, engine_openssl_name)
         || !ENGINE_set_destroy_function(e, openssl_destroy)
 #ifndef TEST_ENG_OPENSSL_NO_ALGORITHMS
         || !ENGINE_set_RSA(e, RSA_get_default_method())
 # ifndef OPENSSL_NO_DSA
         || !ENGINE_set_DSA(e, DSA_get_default_method())
 # endif
 # ifndef OPENSSL_NO_EC
         || !ENGINE_set_EC(e, EC_KEY_OpenSSL())
 # endif
 # ifndef OPENSSL_NO_DH
         || !ENGINE_set_DH(e, DH_get_default_method())
 # endif
         || !ENGINE_set_RAND(e, RAND_OpenSSL())
 # ifdef TEST_ENG_OPENSSL_RC4
         || !ENGINE_set_ciphers(e, openssl_ciphers)
 # endif
 # ifdef TEST_ENG_OPENSSL_SHA
         || !ENGINE_set_digests(e, openssl_digests)
 # endif
 #endif
 #ifdef TEST_ENG_OPENSSL_PKEY
         || !ENGINE_set_load_privkey_function(e, openssl_load_privkey)
 #endif
 #ifdef TEST_ENG_OPENSSL_HMAC
         || !ossl_register_hmac_meth()
         || !ENGINE_set_pkey_meths(e, ossl_pkey_meths)
 #endif
         )
         return 0;
     /*
      * If we add errors to this ENGINE, ensure the error handling is setup
      * here
      */
     /* openssl_load_error_strings(); */
     return 1;
 }

 static ENGINE *engine_openssl(void)
 {
     ENGINE *ret = ENGINE_new();
     if (ret == NULL)
         return NULL;
     if (!bind_helper(ret)) {
         ENGINE_free(ret);
         return NULL;
     }
     return ret;
 }

 void engine_load_openssl_int(void)
 {
     ENGINE *toadd = engine_openssl();
     if (!toadd)
         return;

     ERR_set_mark();
     ENGINE_add(toadd);
     /*
      * If the "add" worked, it gets a structural reference. So either way, we
      * release our just-created reference.
      */
     ENGINE_free(toadd);
     /*
      * If the "add" didn't work, it was probably a conflict because it was
      * already added (eg. someone calling ENGINE_load_blah then calling
      * ENGINE_load_builtin_engines() perhaps).
      */
     ERR_pop_to_mark();
 }

 /*
  * This stuff is needed if this ENGINE is being compiled into a
  * self-contained shared-library.
  */
 #ifdef ENGINE_DYNAMIC_SUPPORT
 static int bind_fn(ENGINE *e, const char *id)
 {
     if (id && (strcmp(id, engine_openssl_id) != 0))
         return 0;
     if (!bind_helper(e))
         return 0;
     return 1;
 }

 IMPLEMENT_DYNAMIC_CHECK_FN()
     IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
 #endif                          /* ENGINE_DYNAMIC_SUPPORT */
 #ifdef TEST_ENG_OPENSSL_RC4
 /*-
  * This section of code compiles an "alternative implementation" of two modes of
  * RC4 into this ENGINE. The result is that EVP_CIPHER operation for "rc4"
  * should under normal circumstances go via this support rather than the default
  * EVP support. There are other symbols to tweak the testing;
  *    TEST_ENC_OPENSSL_RC4_OTHERS - print a one line message to stderr each time
  *        we're asked for a cipher we don't support (should not happen).
  *    TEST_ENG_OPENSSL_RC4_P_INIT - print a one line message to stderr each time
  *        the "init_key" handler is called.
  *    TEST_ENG_OPENSSL_RC4_P_CIPHER - ditto for the "cipher" handler.
  */
 # include <openssl/rc4.h>
 # define TEST_RC4_KEY_SIZE               16
 typedef struct {
     unsigned char key[TEST_RC4_KEY_SIZE];
     RC4_KEY ks;
 } TEST_RC4_KEY;
 # define test(ctx) ((TEST_RC4_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx))
 static int test_rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
                              const unsigned char *iv, int enc)
 {
     const int n = EVP_CIPHER_CTX_get_key_length(ctx);

 # ifdef TEST_ENG_OPENSSL_RC4_P_INIT
     fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_init_key() called\n");
 # endif
     if (n <= 0)
         return n;
     memcpy(&test(ctx)->key[0], key, n);
     RC4_set_key(&test(ctx)->ks, n, test(ctx)->key);
     return 1;
 }

 static int test_rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            const unsigned char *in, size_t inl)
 {
 # ifdef TEST_ENG_OPENSSL_RC4_P_CIPHER
     fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_cipher() called\n");
 # endif
     RC4(&test(ctx)->ks, inl, in, out);
     return 1;
 }

 static EVP_CIPHER *r4_cipher = NULL;
 static const EVP_CIPHER *test_r4_cipher(void)
 {
     if (r4_cipher == NULL) {
         EVP_CIPHER *cipher;

         if ((cipher = EVP_CIPHER_meth_new(NID_rc4, 1, TEST_RC4_KEY_SIZE)) == NULL
             || !EVP_CIPHER_meth_set_iv_length(cipher, 0)
             || !EVP_CIPHER_meth_set_flags(cipher, EVP_CIPH_VARIABLE_LENGTH)
             || !EVP_CIPHER_meth_set_init(cipher, test_rc4_init_key)
             || !EVP_CIPHER_meth_set_do_cipher(cipher, test_rc4_cipher)
             || !EVP_CIPHER_meth_set_impl_ctx_size(cipher, sizeof(TEST_RC4_KEY))) {
             EVP_CIPHER_meth_free(cipher);
             cipher = NULL;
         }
         r4_cipher = cipher;
     }
     return r4_cipher;
 }
 static void test_r4_cipher_destroy(void)
 {
     EVP_CIPHER_meth_free(r4_cipher);
     r4_cipher = NULL;
 }

 static EVP_CIPHER *r4_40_cipher = NULL;
 static const EVP_CIPHER *test_r4_40_cipher(void)
 {
     if (r4_40_cipher == NULL) {
         EVP_CIPHER *cipher;

         if ((cipher = EVP_CIPHER_meth_new(NID_rc4, 1, 5 /* 40 bits */)) == NULL
             || !EVP_CIPHER_meth_set_iv_length(cipher, 0)
             || !EVP_CIPHER_meth_set_flags(cipher, EVP_CIPH_VARIABLE_LENGTH)
             || !EVP_CIPHER_meth_set_init(cipher, test_rc4_init_key)
             || !EVP_CIPHER_meth_set_do_cipher(cipher, test_rc4_cipher)
             || !EVP_CIPHER_meth_set_impl_ctx_size(cipher, sizeof(TEST_RC4_KEY))) {
             EVP_CIPHER_meth_free(cipher);
             cipher = NULL;
         }
         r4_40_cipher = cipher;
     }
     return r4_40_cipher;
 }
 static void test_r4_40_cipher_destroy(void)
 {
     EVP_CIPHER_meth_free(r4_40_cipher);
     r4_40_cipher = NULL;
 }
 static int test_cipher_nids(const int **nids)
 {
     static int cipher_nids[4] = { 0, 0, 0, 0 };
     static int pos = 0;
     static int init = 0;

     if (!init) {
         const EVP_CIPHER *cipher;
         if ((cipher = test_r4_cipher()) != NULL)
             cipher_nids[pos++] = EVP_CIPHER_get_nid(cipher);
         if ((cipher = test_r4_40_cipher()) != NULL)
             cipher_nids[pos++] = EVP_CIPHER_get_nid(cipher);
         cipher_nids[pos] = 0;
         init = 1;
     }
     *nids = cipher_nids;
     return pos;
 }

 static int openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
                            const int **nids, int nid)
 {
     if (!cipher) {
         /* We are returning a list of supported nids */
         return test_cipher_nids(nids);
     }
     /* We are being asked for a specific cipher */
     if (nid == NID_rc4)
         *cipher = test_r4_cipher();
     else if (nid == NID_rc4_40)
         *cipher = test_r4_40_cipher();
     else {
 # ifdef TEST_ENG_OPENSSL_RC4_OTHERS
         fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) returning NULL for "
                 "nid %d\n", nid);
 # endif
         *cipher = NULL;
         return 0;
     }
     return 1;
 }
 #endif

 #ifdef TEST_ENG_OPENSSL_SHA
 /* Much the same sort of comment as for TEST_ENG_OPENSSL_RC4 */
 # include <openssl/sha.h>

 static int test_sha1_init(EVP_MD_CTX *ctx)
 {
 # ifdef TEST_ENG_OPENSSL_SHA_P_INIT
     fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_init() called\n");
 # endif
     return SHA1_Init(EVP_MD_CTX_get0_md_data(ctx));
 }

 static int test_sha1_update(EVP_MD_CTX *ctx, const void *data, size_t count)
 {
 # ifdef TEST_ENG_OPENSSL_SHA_P_UPDATE
     fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_update() called\n");
 # endif
     return SHA1_Update(EVP_MD_CTX_get0_md_data(ctx), data, count);
 }

 static int test_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
 {
 # ifdef TEST_ENG_OPENSSL_SHA_P_FINAL
     fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_final() called\n");
 # endif
     return SHA1_Final(md, EVP_MD_CTX_get0_md_data(ctx));
 }

 static EVP_MD *sha1_md = NULL;
 static const EVP_MD *test_sha_md(void)
 {
     if (sha1_md == NULL) {
         EVP_MD *md;

         if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL
             || !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH)
             || !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK)
             || !EVP_MD_meth_set_app_datasize(md,
                                              sizeof(EVP_MD *) + sizeof(SHA_CTX))
             || !EVP_MD_meth_set_flags(md, 0)
             || !EVP_MD_meth_set_init(md, test_sha1_init)
             || !EVP_MD_meth_set_update(md, test_sha1_update)
             || !EVP_MD_meth_set_final(md, test_sha1_final)) {
             EVP_MD_meth_free(md);
             md = NULL;
         }
         sha1_md = md;
     }
     return sha1_md;
 }
 static void test_sha_md_destroy(void)
 {
     EVP_MD_meth_free(sha1_md);
     sha1_md = NULL;
 }
 static int test_digest_nids(const int **nids)
 {
     static int digest_nids[2] = { 0, 0 };
     static int pos = 0;
     static int init = 0;

     if (!init) {
         const EVP_MD *md;
         if ((md = test_sha_md()) != NULL)
             digest_nids[pos++] = EVP_MD_get_type(md);
         digest_nids[pos] = 0;
         init = 1;
     }
     *nids = digest_nids;
     return pos;
 }

 static int openssl_digests(ENGINE *e, const EVP_MD **digest,
                            const int **nids, int nid)
 {
     if (!digest) {
         /* We are returning a list of supported nids */
         return test_digest_nids(nids);
     }
     /* We are being asked for a specific digest */
     if (nid == NID_sha1)
         *digest = test_sha_md();
     else {
 # ifdef TEST_ENG_OPENSSL_SHA_OTHERS
         fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) returning NULL for "
                 "nid %d\n", nid);
 # endif
         *digest = NULL;
         return 0;
     }
     return 1;
 }
 #endif

 #ifdef TEST_ENG_OPENSSL_PKEY
 static EVP_PKEY *openssl_load_privkey(ENGINE *eng, const char *key_id,
                                       UI_METHOD *ui_method,
                                       void *callback_data)
 {
     BIO *in;
     EVP_PKEY *key;
     fprintf(stderr, "(TEST_ENG_OPENSSL_PKEY)Loading Private key %s\n",
             key_id);
     in = BIO_new_file(key_id, "r");
     if (!in)
         return NULL;
     key = PEM_read_bio_PrivateKey(in, NULL, 0, NULL);
     BIO_free(in);
     return key;
 }
 #endif

 #ifdef TEST_ENG_OPENSSL_HMAC

 /*
  * Experimental HMAC redirection implementation: mainly copied from
  * hm_pmeth.c
  */

 /* HMAC pkey context structure */

 typedef struct {
     const EVP_MD *md;           /* MD for HMAC use */
     ASN1_OCTET_STRING ktmp;     /* Temp storage for key */
     HMAC_CTX *ctx;
 } OSSL_HMAC_PKEY_CTX;

 static int ossl_hmac_init(EVP_PKEY_CTX *ctx)
 {
     OSSL_HMAC_PKEY_CTX *hctx;

     if ((hctx = OPENSSL_zalloc(sizeof(*hctx))) == NULL) {
         ERR_raise(ERR_LIB_ENGINE, ERR_R_MALLOC_FAILURE);
         return 0;
     }
     hctx->ktmp.type = V_ASN1_OCTET_STRING;
     hctx->ctx = HMAC_CTX_new();
     if (hctx->ctx == NULL) {
         OPENSSL_free(hctx);
         return 0;
     }
     EVP_PKEY_CTX_set_data(ctx, hctx);
     EVP_PKEY_CTX_set0_keygen_info(ctx, NULL, 0);
 # ifdef TEST_ENG_OPENSSL_HMAC_INIT
     fprintf(stderr, "(TEST_ENG_OPENSSL_HMAC) ossl_hmac_init() called\n");
 # endif
     return 1;
 }

 static void ossl_hmac_cleanup(EVP_PKEY_CTX *ctx);

 static int ossl_hmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
 {
     OSSL_HMAC_PKEY_CTX *sctx, *dctx;

     /* allocate memory for dst->data and a new HMAC_CTX in dst->data->ctx */
     if (!ossl_hmac_init(dst))
         return 0;
     sctx = EVP_PKEY_CTX_get_data(src);
     dctx = EVP_PKEY_CTX_get_data(dst);
     dctx->md = sctx->md;
     if (!HMAC_CTX_copy(dctx->ctx, sctx->ctx))
         goto err;
     if (sctx->ktmp.data) {
         if (!ASN1_OCTET_STRING_set(&dctx->ktmp,
                                    sctx->ktmp.data, sctx->ktmp.length))
             goto err;
     }
     return 1;
 err:
     /* release HMAC_CTX in dst->data->ctx and memory allocated for dst->data */
     ossl_hmac_cleanup(dst);
     return 0;
 }

 static void ossl_hmac_cleanup(EVP_PKEY_CTX *ctx)
 {
     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);

     if (hctx) {
         HMAC_CTX_free(hctx->ctx);
         OPENSSL_clear_free(hctx->ktmp.data, hctx->ktmp.length);
         OPENSSL_free(hctx);
         EVP_PKEY_CTX_set_data(ctx, NULL);
     }
 }

 static int ossl_hmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
 {
     ASN1_OCTET_STRING *hkey = NULL;
     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
     if (!hctx->ktmp.data)
         return 0;
     hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
     if (!hkey)
         return 0;
     EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);

     return 1;
 }

 static int ossl_int_update(EVP_MD_CTX *ctx, const void *data, size_t count)
 {
     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(EVP_MD_CTX_get_pkey_ctx(ctx));
     if (!HMAC_Update(hctx->ctx, data, count))
         return 0;
     return 1;
 }

 static int ossl_hmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
 {
     EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
     EVP_MD_CTX_set_update_fn(mctx, ossl_int_update);
     return 1;
 }

 static int ossl_hmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig,
                              size_t *siglen, EVP_MD_CTX *mctx)
 {
     unsigned int hlen;
     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
     int l = EVP_MD_CTX_get_size(mctx);

     if (l < 0)
         return 0;
     *siglen = l;
     if (!sig)
         return 1;

     if (!HMAC_Final(hctx->ctx, sig, &hlen))
         return 0;
     *siglen = (size_t)hlen;
     return 1;
 }

 static int ossl_hmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 {
     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
     EVP_PKEY *pk;
     ASN1_OCTET_STRING *key;
     switch (type) {

     case EVP_PKEY_CTRL_SET_MAC_KEY:
         if ((!p2 && p1 > 0) || (p1 < -1))
             return 0;
         if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
             return 0;
         break;

     case EVP_PKEY_CTRL_MD:
         hctx->md = p2;
         break;

     case EVP_PKEY_CTRL_DIGESTINIT:
         pk = EVP_PKEY_CTX_get0_pkey(ctx);
         key = EVP_PKEY_get0(pk);
         if (!HMAC_Init_ex(hctx->ctx, key->data, key->length, hctx->md, NULL))
             return 0;
         break;

     default:
         return -2;

     }
     return 1;
 }

 static int ossl_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
                               const char *type, const char *value)
 {
     if (!value) {
         return 0;
     }
     if (strcmp(type, "key") == 0) {
         void *p = (void *)value;
         return ossl_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, -1, p);
     }
     if (strcmp(type, "hexkey") == 0) {
         unsigned char *key;
         int r;
         long keylen;
         key = OPENSSL_hexstr2buf(value, &keylen);
         if (!key)
             return 0;
         r = ossl_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
         OPENSSL_free(key);
         return r;
     }
     return -2;
 }

 static EVP_PKEY_METHOD *ossl_hmac_meth;

 static int ossl_register_hmac_meth(void)
 {
     EVP_PKEY_METHOD *meth;
     meth = EVP_PKEY_meth_new(EVP_PKEY_HMAC, 0);
     if (meth == NULL)
         return 0;
     EVP_PKEY_meth_set_init(meth, ossl_hmac_init);
     EVP_PKEY_meth_set_copy(meth, ossl_hmac_copy);
     EVP_PKEY_meth_set_cleanup(meth, ossl_hmac_cleanup);

     EVP_PKEY_meth_set_keygen(meth, 0, ossl_hmac_keygen);

     EVP_PKEY_meth_set_signctx(meth, ossl_hmac_signctx_init,
                               ossl_hmac_signctx);

     EVP_PKEY_meth_set_ctrl(meth, ossl_hmac_ctrl, ossl_hmac_ctrl_str);
     ossl_hmac_meth = meth;
     return 1;
 }

 static int ossl_pkey_meths(ENGINE *e, EVP_PKEY_METHOD **pmeth,
                            const int **nids, int nid)
 {
     static int ossl_pkey_nids[] = {
         EVP_PKEY_HMAC,
         0
     };

     if (pmeth == NULL) {
         *nids = ossl_pkey_nids;
         return 1;
     }

     if (nid == EVP_PKEY_HMAC) {
         *pmeth = ossl_hmac_meth;
         return 1;
     }

     *pmeth = NULL;
     return 0;
 }

 #endif

 int openssl_destroy(ENGINE *e)
 {
     test_sha_md_destroy();
 #ifdef TEST_ENG_OPENSSL_RC4
     test_r4_cipher_destroy();
     test_r4_40_cipher_destroy();
 #endif
     return 1;
 }
	/*
	* Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved.
	* Copyright (c) 2002, Oracle and/or its affiliates. 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
	*/

	/* We need to use some engine deprecated APIs */
	#define OPENSSL_SUPPRESS_DEPRECATED

	/*
	* RC4 and SHA-1 low level APIs and EVP _meth_ APISs are deprecated for public
	* use, but still ok for internal use.
	*/
	#include "internal/deprecated.h"

	#include <stdio.h>
	#include <openssl/crypto.h>
	#include "internal/cryptlib.h"
	#include "crypto/engine.h"
	#include <openssl/pem.h>
	#include <openssl/evp.h>
	#include <openssl/rand.h>
	#include <openssl/rsa.h>
	#include <openssl/dsa.h>
	#include <openssl/dh.h>

	#include <openssl/hmac.h>
	#include <openssl/x509v3.h>

	/*
	* This testing gunk is implemented (and explained) lower down. It also
	* assumes the application explicitly calls "ENGINE_load_openssl()" because
	* this is no longer automatic in ENGINE_load_builtin_engines().
	*/
	#define TEST_ENG_OPENSSL_RC4
	#ifndef OPENSSL_NO_STDIO
	# define TEST_ENG_OPENSSL_PKEY
	#endif
	/* #define TEST_ENG_OPENSSL_HMAC */
	/* #define TEST_ENG_OPENSSL_HMAC_INIT */
	/* #define TEST_ENG_OPENSSL_RC4_OTHERS */
	#ifndef OPENSSL_NO_STDIO
	# define TEST_ENG_OPENSSL_RC4_P_INIT
	#endif
	/* #define TEST_ENG_OPENSSL_RC4_P_CIPHER */
	#define TEST_ENG_OPENSSL_SHA
	/* #define TEST_ENG_OPENSSL_SHA_OTHERS */
	/* #define TEST_ENG_OPENSSL_SHA_P_INIT */
	/* #define TEST_ENG_OPENSSL_SHA_P_UPDATE */
	/* #define TEST_ENG_OPENSSL_SHA_P_FINAL */

	/* Now check what of those algorithms are actually enabled */
	#ifdef OPENSSL_NO_RC4
	# undef TEST_ENG_OPENSSL_RC4
	# undef TEST_ENG_OPENSSL_RC4_OTHERS
	# undef TEST_ENG_OPENSSL_RC4_P_INIT
	# undef TEST_ENG_OPENSSL_RC4_P_CIPHER
	#endif

	static int openssl_destroy(ENGINE *e);

	#ifdef TEST_ENG_OPENSSL_RC4
	static int openssl_ciphers(ENGINE e, const EVP_CIPHER *cipher,
	const int **nids, int nid);
	#endif
	#ifdef TEST_ENG_OPENSSL_SHA
	static int openssl_digests(ENGINE e, const EVP_MD *digest,
	const int **nids, int nid);
	#endif

	#ifdef TEST_ENG_OPENSSL_PKEY
	static EVP_PKEY openssl_load_privkey(ENGINE eng, const char *key_id,
	UI_METHOD *ui_method,
	void *callback_data);
	#endif

	#ifdef TEST_ENG_OPENSSL_HMAC
	static int ossl_register_hmac_meth(void);
	static int ossl_pkey_meths(ENGINE e, EVP_PKEY_METHOD *pmeth,
	const int **nids, int nid);
	#endif

	/* The constants used when creating the ENGINE */
	static const char *engine_openssl_id = "openssl";
	static const char *engine_openssl_name = "Software engine support";

	/*
	* This internal function is used by ENGINE_openssl() and possibly by the
	* "dynamic" ENGINE support too
	*/
	static int bind_helper(ENGINE *e)
	{
	if (!ENGINE_set_id(e, engine_openssl_id)
	\|\| !ENGINE_set_name(e, engine_openssl_name)
	\|\| !ENGINE_set_destroy_function(e, openssl_destroy)
	#ifndef TEST_ENG_OPENSSL_NO_ALGORITHMS
	\|\| !ENGINE_set_RSA(e, RSA_get_default_method())
	# ifndef OPENSSL_NO_DSA
	\|\| !ENGINE_set_DSA(e, DSA_get_default_method())
	# endif
	# ifndef OPENSSL_NO_EC
	\|\| !ENGINE_set_EC(e, EC_KEY_OpenSSL())
	# endif
	# ifndef OPENSSL_NO_DH
	\|\| !ENGINE_set_DH(e, DH_get_default_method())
	# endif
	\|\| !ENGINE_set_RAND(e, RAND_OpenSSL())
	# ifdef TEST_ENG_OPENSSL_RC4
	\|\| !ENGINE_set_ciphers(e, openssl_ciphers)
	# endif
	# ifdef TEST_ENG_OPENSSL_SHA
	\|\| !ENGINE_set_digests(e, openssl_digests)
	# endif
	#endif
	#ifdef TEST_ENG_OPENSSL_PKEY
	\|\| !ENGINE_set_load_privkey_function(e, openssl_load_privkey)
	#endif
	#ifdef TEST_ENG_OPENSSL_HMAC
	\|\| !ossl_register_hmac_meth()
	\|\| !ENGINE_set_pkey_meths(e, ossl_pkey_meths)
	#endif
	)
	return 0;
	/*
	* If we add errors to this ENGINE, ensure the error handling is setup
	* here
	*/
	/* openssl_load_error_strings(); */
	return 1;
	}

	static ENGINE *engine_openssl(void)
	{
	ENGINE *ret = ENGINE_new();
	if (ret == NULL)
	return NULL;
	if (!bind_helper(ret)) {
	ENGINE_free(ret);
	return NULL;
	}
	return ret;
	}

	void engine_load_openssl_int(void)
	{
	ENGINE *toadd = engine_openssl();
	if (!toadd)
	return;

	ERR_set_mark();
	ENGINE_add(toadd);
	/*
	* If the "add" worked, it gets a structural reference. So either way, we
	* release our just-created reference.
	*/
	ENGINE_free(toadd);
	/*
	* If the "add" didn't work, it was probably a conflict because it was
	* already added (eg. someone calling ENGINE_load_blah then calling
	* ENGINE_load_builtin_engines() perhaps).
	*/
	ERR_pop_to_mark();
	}

	/*
	* This stuff is needed if this ENGINE is being compiled into a
	* self-contained shared-library.
	*/
	#ifdef ENGINE_DYNAMIC_SUPPORT
	static int bind_fn(ENGINE e, const char id)
	{
	if (id && (strcmp(id, engine_openssl_id) != 0))
	return 0;
	if (!bind_helper(e))
	return 0;
	return 1;
	}

	IMPLEMENT_DYNAMIC_CHECK_FN()
	IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
	#endif /* ENGINE_DYNAMIC_SUPPORT */
	#ifdef TEST_ENG_OPENSSL_RC4
	/*-
	* This section of code compiles an "alternative implementation" of two modes of
	* RC4 into this ENGINE. The result is that EVP_CIPHER operation for "rc4"
	* should under normal circumstances go via this support rather than the default
	* EVP support. There are other symbols to tweak the testing;
	* TEST_ENC_OPENSSL_RC4_OTHERS - print a one line message to stderr each time
	* we're asked for a cipher we don't support (should not happen).
	* TEST_ENG_OPENSSL_RC4_P_INIT - print a one line message to stderr each time
	* the "init_key" handler is called.
	* TEST_ENG_OPENSSL_RC4_P_CIPHER - ditto for the "cipher" handler.
	*/
	# include <openssl/rc4.h>
	# define TEST_RC4_KEY_SIZE 16
	typedef struct {
	unsigned char key[TEST_RC4_KEY_SIZE];
	RC4_KEY ks;
	} TEST_RC4_KEY;
	# define test(ctx) ((TEST_RC4_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx))
	static int test_rc4_init_key(EVP_CIPHER_CTX ctx, const unsigned char key,
	const unsigned char *iv, int enc)
	{
	const int n = EVP_CIPHER_CTX_get_key_length(ctx);

	# ifdef TEST_ENG_OPENSSL_RC4_P_INIT
	fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_init_key() called\n");
	# endif
	if (n <= 0)
	return n;
	memcpy(&test(ctx)->key[0], key, n);
	RC4_set_key(&test(ctx)->ks, n, test(ctx)->key);
	return 1;
	}

	static int test_rc4_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
	const unsigned char *in, size_t inl)
	{
	# ifdef TEST_ENG_OPENSSL_RC4_P_CIPHER
	fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_cipher() called\n");
	# endif
	RC4(&test(ctx)->ks, inl, in, out);
	return 1;
	}

	static EVP_CIPHER *r4_cipher = NULL;
	static const EVP_CIPHER *test_r4_cipher(void)
	{
	if (r4_cipher == NULL) {
	EVP_CIPHER *cipher;

	if ((cipher = EVP_CIPHER_meth_new(NID_rc4, 1, TEST_RC4_KEY_SIZE)) == NULL
	\|\| !EVP_CIPHER_meth_set_iv_length(cipher, 0)
	\|\| !EVP_CIPHER_meth_set_flags(cipher, EVP_CIPH_VARIABLE_LENGTH)
	\|\| !EVP_CIPHER_meth_set_init(cipher, test_rc4_init_key)
	\|\| !EVP_CIPHER_meth_set_do_cipher(cipher, test_rc4_cipher)
	\|\| !EVP_CIPHER_meth_set_impl_ctx_size(cipher, sizeof(TEST_RC4_KEY))) {
	EVP_CIPHER_meth_free(cipher);
	cipher = NULL;
	}
	r4_cipher = cipher;
	}
	return r4_cipher;
	}
	static void test_r4_cipher_destroy(void)
	{
	EVP_CIPHER_meth_free(r4_cipher);
	r4_cipher = NULL;
	}

	static EVP_CIPHER *r4_40_cipher = NULL;
	static const EVP_CIPHER *test_r4_40_cipher(void)
	{
	if (r4_40_cipher == NULL) {
	EVP_CIPHER *cipher;

	if ((cipher = EVP_CIPHER_meth_new(NID_rc4, 1, 5 /* 40 bits */)) == NULL
	\|\| !EVP_CIPHER_meth_set_iv_length(cipher, 0)
	\|\| !EVP_CIPHER_meth_set_flags(cipher, EVP_CIPH_VARIABLE_LENGTH)
	\|\| !EVP_CIPHER_meth_set_init(cipher, test_rc4_init_key)
	\|\| !EVP_CIPHER_meth_set_do_cipher(cipher, test_rc4_cipher)
	\|\| !EVP_CIPHER_meth_set_impl_ctx_size(cipher, sizeof(TEST_RC4_KEY))) {
	EVP_CIPHER_meth_free(cipher);
	cipher = NULL;
	}
	r4_40_cipher = cipher;
	}
	return r4_40_cipher;
	}
	static void test_r4_40_cipher_destroy(void)
	{
	EVP_CIPHER_meth_free(r4_40_cipher);
	r4_40_cipher = NULL;
	}
	static int test_cipher_nids(const int **nids)
	{
	static int cipher_nids[4] = { 0, 0, 0, 0 };
	static int pos = 0;
	static int init = 0;

	if (!init) {
	const EVP_CIPHER *cipher;
	if ((cipher = test_r4_cipher()) != NULL)
	cipher_nids[pos++] = EVP_CIPHER_get_nid(cipher);
	if ((cipher = test_r4_40_cipher()) != NULL)
	cipher_nids[pos++] = EVP_CIPHER_get_nid(cipher);
	cipher_nids[pos] = 0;
	init = 1;
	}
	*nids = cipher_nids;
	return pos;
	}

	static int openssl_ciphers(ENGINE e, const EVP_CIPHER *cipher,
	const int **nids, int nid)
	{
	if (!cipher) {
	/* We are returning a list of supported nids */
	return test_cipher_nids(nids);
	}
	/* We are being asked for a specific cipher */
	if (nid == NID_rc4)
	*cipher = test_r4_cipher();
	else if (nid == NID_rc4_40)
	*cipher = test_r4_40_cipher();
	else {
	# ifdef TEST_ENG_OPENSSL_RC4_OTHERS
	fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) returning NULL for "
	"nid %d\n", nid);
	# endif
	*cipher = NULL;
	return 0;
	}
	return 1;
	}
	#endif

	#ifdef TEST_ENG_OPENSSL_SHA
	/* Much the same sort of comment as for TEST_ENG_OPENSSL_RC4 */
	# include <openssl/sha.h>

	static int test_sha1_init(EVP_MD_CTX *ctx)
	{
	# ifdef TEST_ENG_OPENSSL_SHA_P_INIT
	fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_init() called\n");
	# endif
	return SHA1_Init(EVP_MD_CTX_get0_md_data(ctx));
	}

	static int test_sha1_update(EVP_MD_CTX ctx, const void data, size_t count)
	{
	# ifdef TEST_ENG_OPENSSL_SHA_P_UPDATE
	fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_update() called\n");
	# endif
	return SHA1_Update(EVP_MD_CTX_get0_md_data(ctx), data, count);
	}

	static int test_sha1_final(EVP_MD_CTX ctx, unsigned char md)
	{
	# ifdef TEST_ENG_OPENSSL_SHA_P_FINAL
	fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_final() called\n");
	# endif
	return SHA1_Final(md, EVP_MD_CTX_get0_md_data(ctx));
	}

	static EVP_MD *sha1_md = NULL;
	static const EVP_MD *test_sha_md(void)
	{
	if (sha1_md == NULL) {
	EVP_MD *md;

	if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL
	\|\| !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH)
	\|\| !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK)
	\|\| !EVP_MD_meth_set_app_datasize(md,
	sizeof(EVP_MD *) + sizeof(SHA_CTX))
	\|\| !EVP_MD_meth_set_flags(md, 0)
	\|\| !EVP_MD_meth_set_init(md, test_sha1_init)
	\|\| !EVP_MD_meth_set_update(md, test_sha1_update)
	\|\| !EVP_MD_meth_set_final(md, test_sha1_final)) {
	EVP_MD_meth_free(md);
	md = NULL;
	}
	sha1_md = md;
	}
	return sha1_md;
	}
	static void test_sha_md_destroy(void)
	{
	EVP_MD_meth_free(sha1_md);
	sha1_md = NULL;
	}
	static int test_digest_nids(const int **nids)
	{
	static int digest_nids[2] = { 0, 0 };
	static int pos = 0;
	static int init = 0;

	if (!init) {
	const EVP_MD *md;
	if ((md = test_sha_md()) != NULL)
	digest_nids[pos++] = EVP_MD_get_type(md);
	digest_nids[pos] = 0;
	init = 1;
	}
	*nids = digest_nids;
	return pos;
	}

	static int openssl_digests(ENGINE e, const EVP_MD *digest,
	const int **nids, int nid)
	{
	if (!digest) {
	/* We are returning a list of supported nids */
	return test_digest_nids(nids);
	}
	/* We are being asked for a specific digest */
	if (nid == NID_sha1)
	*digest = test_sha_md();
	else {
	# ifdef TEST_ENG_OPENSSL_SHA_OTHERS
	fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) returning NULL for "
	"nid %d\n", nid);
	# endif
	*digest = NULL;
	return 0;
	}
	return 1;
	}
	#endif

	#ifdef TEST_ENG_OPENSSL_PKEY
	static EVP_PKEY openssl_load_privkey(ENGINE eng, const char *key_id,
	UI_METHOD *ui_method,
	void *callback_data)
	{
	BIO *in;
	EVP_PKEY *key;
	fprintf(stderr, "(TEST_ENG_OPENSSL_PKEY)Loading Private key %s\n",
	key_id);
	in = BIO_new_file(key_id, "r");
	if (!in)
	return NULL;
	key = PEM_read_bio_PrivateKey(in, NULL, 0, NULL);
	BIO_free(in);
	return key;
	}
	#endif

	#ifdef TEST_ENG_OPENSSL_HMAC

	/*
	* Experimental HMAC redirection implementation: mainly copied from
	* hm_pmeth.c
	*/

	/* HMAC pkey context structure */

	typedef struct {
	const EVP_MD md; / MD for HMAC use */
	ASN1_OCTET_STRING ktmp; /* Temp storage for key */
	HMAC_CTX *ctx;
	} OSSL_HMAC_PKEY_CTX;

	static int ossl_hmac_init(EVP_PKEY_CTX *ctx)
	{
	OSSL_HMAC_PKEY_CTX *hctx;

	if ((hctx = OPENSSL_zalloc(sizeof(*hctx))) == NULL) {
	ERR_raise(ERR_LIB_ENGINE, ERR_R_MALLOC_FAILURE);
	return 0;
	}
	hctx->ktmp.type = V_ASN1_OCTET_STRING;
	hctx->ctx = HMAC_CTX_new();
	if (hctx->ctx == NULL) {
	OPENSSL_free(hctx);
	return 0;
	}
	EVP_PKEY_CTX_set_data(ctx, hctx);
	EVP_PKEY_CTX_set0_keygen_info(ctx, NULL, 0);
	# ifdef TEST_ENG_OPENSSL_HMAC_INIT
	fprintf(stderr, "(TEST_ENG_OPENSSL_HMAC) ossl_hmac_init() called\n");
	# endif
	return 1;
	}

	static void ossl_hmac_cleanup(EVP_PKEY_CTX *ctx);

	static int ossl_hmac_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src)
	{
	OSSL_HMAC_PKEY_CTX sctx, dctx;

	/* allocate memory for dst->data and a new HMAC_CTX in dst->data->ctx */
	if (!ossl_hmac_init(dst))
	return 0;
	sctx = EVP_PKEY_CTX_get_data(src);
	dctx = EVP_PKEY_CTX_get_data(dst);
	dctx->md = sctx->md;
	if (!HMAC_CTX_copy(dctx->ctx, sctx->ctx))
	goto err;
	if (sctx->ktmp.data) {
	if (!ASN1_OCTET_STRING_set(&dctx->ktmp,
	sctx->ktmp.data, sctx->ktmp.length))
	goto err;
	}
	return 1;
	err:
	/* release HMAC_CTX in dst->data->ctx and memory allocated for dst->data */
	ossl_hmac_cleanup(dst);
	return 0;
	}

	static void ossl_hmac_cleanup(EVP_PKEY_CTX *ctx)
	{
	OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);

	if (hctx) {
	HMAC_CTX_free(hctx->ctx);
	OPENSSL_clear_free(hctx->ktmp.data, hctx->ktmp.length);
	OPENSSL_free(hctx);
	EVP_PKEY_CTX_set_data(ctx, NULL);
	}
	}

	static int ossl_hmac_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
	{
	ASN1_OCTET_STRING *hkey = NULL;
	OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
	if (!hctx->ktmp.data)
	return 0;
	hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
	if (!hkey)
	return 0;
	EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);

	return 1;
	}

	static int ossl_int_update(EVP_MD_CTX ctx, const void data, size_t count)
	{
	OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(EVP_MD_CTX_get_pkey_ctx(ctx));
	if (!HMAC_Update(hctx->ctx, data, count))
	return 0;
	return 1;
	}

	static int ossl_hmac_signctx_init(EVP_PKEY_CTX ctx, EVP_MD_CTX mctx)
	{
	EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
	EVP_MD_CTX_set_update_fn(mctx, ossl_int_update);
	return 1;
	}

	static int ossl_hmac_signctx(EVP_PKEY_CTX ctx, unsigned char sig,
	size_t siglen, EVP_MD_CTX mctx)
	{
	unsigned int hlen;
	OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
	int l = EVP_MD_CTX_get_size(mctx);

	if (l < 0)
	return 0;
	*siglen = l;
	if (!sig)
	return 1;

	if (!HMAC_Final(hctx->ctx, sig, &hlen))
	return 0;
	*siglen = (size_t)hlen;
	return 1;
	}

	static int ossl_hmac_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
	{
	OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
	EVP_PKEY *pk;
	ASN1_OCTET_STRING *key;
	switch (type) {

	case EVP_PKEY_CTRL_SET_MAC_KEY:
	if ((!p2 && p1 > 0) \|\| (p1 < -1))
	return 0;
	if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
	return 0;
	break;

	case EVP_PKEY_CTRL_MD:
	hctx->md = p2;
	break;

	case EVP_PKEY_CTRL_DIGESTINIT:
	pk = EVP_PKEY_CTX_get0_pkey(ctx);
	key = EVP_PKEY_get0(pk);
	if (!HMAC_Init_ex(hctx->ctx, key->data, key->length, hctx->md, NULL))
	return 0;
	break;

	default:
	return -2;

	}
	return 1;
	}

	static int ossl_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
	const char type, const char value)
	{
	if (!value) {
	return 0;
	}
	if (strcmp(type, "key") == 0) {
	void p = (void )value;
	return ossl_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, -1, p);
	}
	if (strcmp(type, "hexkey") == 0) {
	unsigned char *key;
	int r;
	long keylen;
	key = OPENSSL_hexstr2buf(value, &keylen);
	if (!key)
	return 0;
	r = ossl_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
	OPENSSL_free(key);
	return r;
	}
	return -2;
	}

	static EVP_PKEY_METHOD *ossl_hmac_meth;

	static int ossl_register_hmac_meth(void)
	{
	EVP_PKEY_METHOD *meth;
	meth = EVP_PKEY_meth_new(EVP_PKEY_HMAC, 0);
	if (meth == NULL)
	return 0;
	EVP_PKEY_meth_set_init(meth, ossl_hmac_init);
	EVP_PKEY_meth_set_copy(meth, ossl_hmac_copy);
	EVP_PKEY_meth_set_cleanup(meth, ossl_hmac_cleanup);

	EVP_PKEY_meth_set_keygen(meth, 0, ossl_hmac_keygen);

	EVP_PKEY_meth_set_signctx(meth, ossl_hmac_signctx_init,
	ossl_hmac_signctx);

	EVP_PKEY_meth_set_ctrl(meth, ossl_hmac_ctrl, ossl_hmac_ctrl_str);
	ossl_hmac_meth = meth;
	return 1;
	}

	static int ossl_pkey_meths(ENGINE e, EVP_PKEY_METHOD *pmeth,
	const int **nids, int nid)
	{
	static int ossl_pkey_nids[] = {
	EVP_PKEY_HMAC,
	0
	};

	if (pmeth == NULL) {
	*nids = ossl_pkey_nids;
	return 1;
	}

	if (nid == EVP_PKEY_HMAC) {
	*pmeth = ossl_hmac_meth;
	return 1;
	}

	*pmeth = NULL;
	return 0;
	}

	#endif

	int openssl_destroy(ENGINE *e)
	{
	test_sha_md_destroy();
	#ifdef TEST_ENG_OPENSSL_RC4
	test_r4_cipher_destroy();
	test_r4_40_cipher_destroy();
	#endif
	return 1;
	}