/src/openssl32/crypto/engine/eng_openssl.c

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/*
 * 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)
        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;
}


Coverage Report

Created: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved.
3		* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4		*
5		* Licensed under the Apache License 2.0 (the "License"). You may not use
6		* this file except in compliance with the License. You can obtain a copy
7		* in the file LICENSE in the source distribution or at
8		* https://www.openssl.org/source/license.html
9		*/
10
11		/* We need to use some engine deprecated APIs */
12		#define OPENSSL_SUPPRESS_DEPRECATED
13
14		/*
15		* RC4 and SHA-1 low level APIs and EVP _meth_ APISs are deprecated for public
16		* use, but still ok for internal use.
17		*/
18		#include "internal/deprecated.h"
19
20		#include <stdio.h>
21		#include <openssl/crypto.h>
22		#include "internal/cryptlib.h"
23		#include "crypto/engine.h"
24		#include <openssl/pem.h>
25		#include <openssl/evp.h>
26		#include <openssl/rand.h>
27		#include <openssl/rsa.h>
28		#include <openssl/dsa.h>
29		#include <openssl/dh.h>
30
31		#include <openssl/hmac.h>
32		#include <openssl/x509v3.h>
33
34		/*
35		* This testing gunk is implemented (and explained) lower down. It also
36		* assumes the application explicitly calls "ENGINE_load_openssl()" because
37		* this is no longer automatic in ENGINE_load_builtin_engines().
38		*/
39		#define TEST_ENG_OPENSSL_RC4
40		#ifndef OPENSSL_NO_STDIO
41		# define TEST_ENG_OPENSSL_PKEY
42		#endif
43		/* #define TEST_ENG_OPENSSL_HMAC */
44		/* #define TEST_ENG_OPENSSL_HMAC_INIT */
45		/* #define TEST_ENG_OPENSSL_RC4_OTHERS */
46		#ifndef OPENSSL_NO_STDIO
47		# define TEST_ENG_OPENSSL_RC4_P_INIT
48		#endif
49		/* #define TEST_ENG_OPENSSL_RC4_P_CIPHER */
50		#define TEST_ENG_OPENSSL_SHA
51		/* #define TEST_ENG_OPENSSL_SHA_OTHERS */
52		/* #define TEST_ENG_OPENSSL_SHA_P_INIT */
53		/* #define TEST_ENG_OPENSSL_SHA_P_UPDATE */
54		/* #define TEST_ENG_OPENSSL_SHA_P_FINAL */
55
56		/* Now check what of those algorithms are actually enabled */
57		#ifdef OPENSSL_NO_RC4
58		# undef TEST_ENG_OPENSSL_RC4
59		# undef TEST_ENG_OPENSSL_RC4_OTHERS
60		# undef TEST_ENG_OPENSSL_RC4_P_INIT
61		# undef TEST_ENG_OPENSSL_RC4_P_CIPHER
62		#endif
63
64		static int openssl_destroy(ENGINE *e);
65
66		#ifdef TEST_ENG_OPENSSL_RC4
67		static int openssl_ciphers(ENGINE e, const EVP_CIPHER *cipher,
68		const int **nids, int nid);
69		#endif
70		#ifdef TEST_ENG_OPENSSL_SHA
71		static int openssl_digests(ENGINE e, const EVP_MD *digest,
72		const int **nids, int nid);
73		#endif
74
75		#ifdef TEST_ENG_OPENSSL_PKEY
76		static EVP_PKEY openssl_load_privkey(ENGINE eng, const char *key_id,
77		UI_METHOD *ui_method,
78		void *callback_data);
79		#endif
80
81		#ifdef TEST_ENG_OPENSSL_HMAC
82		static int ossl_register_hmac_meth(void);
83		static int ossl_pkey_meths(ENGINE e, EVP_PKEY_METHOD *pmeth,
84		const int **nids, int nid);
85		#endif
86
87		/* The constants used when creating the ENGINE */
88		static const char *engine_openssl_id = "openssl";
89		static const char *engine_openssl_name = "Software engine support";
90
91		/*
92		* This internal function is used by ENGINE_openssl() and possibly by the
93		* "dynamic" ENGINE support too
94		*/
95		static int bind_helper(ENGINE *e)
96	0	{
97	0	if (!ENGINE_set_id(e, engine_openssl_id)
98	0	\|\| !ENGINE_set_name(e, engine_openssl_name)
99	0	\|\| !ENGINE_set_destroy_function(e, openssl_destroy)
100	0	#ifndef TEST_ENG_OPENSSL_NO_ALGORITHMS
101	0	\|\| !ENGINE_set_RSA(e, RSA_get_default_method())
102	0	# ifndef OPENSSL_NO_DSA
103	0	\|\| !ENGINE_set_DSA(e, DSA_get_default_method())
104	0	# endif
105	0	# ifndef OPENSSL_NO_EC
106	0	\|\| !ENGINE_set_EC(e, EC_KEY_OpenSSL())
107	0	# endif
108	0	# ifndef OPENSSL_NO_DH
109	0	\|\| !ENGINE_set_DH(e, DH_get_default_method())
110	0	# endif
111	0	\|\| !ENGINE_set_RAND(e, RAND_OpenSSL())
112	0	# ifdef TEST_ENG_OPENSSL_RC4
113	0	\|\| !ENGINE_set_ciphers(e, openssl_ciphers)
114	0	# endif
115	0	# ifdef TEST_ENG_OPENSSL_SHA
116	0	\|\| !ENGINE_set_digests(e, openssl_digests)
117	0	# endif
118	0	#endif
119	0	#ifdef TEST_ENG_OPENSSL_PKEY
120	0	\|\| !ENGINE_set_load_privkey_function(e, openssl_load_privkey)
121	0	#endif
122		#ifdef TEST_ENG_OPENSSL_HMAC
123		\|\| !ossl_register_hmac_meth()
124		\|\| !ENGINE_set_pkey_meths(e, ossl_pkey_meths)
125		#endif
126	0	)
127	0	return 0;
128		/*
129		* If we add errors to this ENGINE, ensure the error handling is setup
130		* here
131		*/
132		/* openssl_load_error_strings(); */
133	0	return 1;
134	0	}
135
136		static ENGINE *engine_openssl(void)
137	0	{
138	0	ENGINE *ret = ENGINE_new();
139	0	if (ret == NULL)
140	0	return NULL;
141	0	if (!bind_helper(ret)) {
142	0	ENGINE_free(ret);
143	0	return NULL;
144	0	}
145	0	return ret;
146	0	}
147
148		void engine_load_openssl_int(void)
149	0	{
150	0	ENGINE *toadd = engine_openssl();
151	0	if (!toadd)
152	0	return;
153
154	0	ERR_set_mark();
155	0	ENGINE_add(toadd);
156		/*
157		* If the "add" worked, it gets a structural reference. So either way, we
158		* release our just-created reference.
159		*/
160	0	ENGINE_free(toadd);
161		/*
162		* If the "add" didn't work, it was probably a conflict because it was
163		* already added (eg. someone calling ENGINE_load_blah then calling
164		* ENGINE_load_builtin_engines() perhaps).
165		*/
166	0	ERR_pop_to_mark();
167	0	}
168
169		/*
170		* This stuff is needed if this ENGINE is being compiled into a
171		* self-contained shared-library.
172		*/
173		#ifdef ENGINE_DYNAMIC_SUPPORT
174		static int bind_fn(ENGINE e, const char id)
175		{
176		if (id && (strcmp(id, engine_openssl_id) != 0))
177		return 0;
178		if (!bind_helper(e))
179		return 0;
180		return 1;
181		}
182
183		IMPLEMENT_DYNAMIC_CHECK_FN()
184		IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
185		#endif /* ENGINE_DYNAMIC_SUPPORT */
186		#ifdef TEST_ENG_OPENSSL_RC4
187		/*-
188		* This section of code compiles an "alternative implementation" of two modes of
189		* RC4 into this ENGINE. The result is that EVP_CIPHER operation for "rc4"
190		* should under normal circumstances go via this support rather than the default
191		* EVP support. There are other symbols to tweak the testing;
192		* TEST_ENC_OPENSSL_RC4_OTHERS - print a one line message to stderr each time
193		* we're asked for a cipher we don't support (should not happen).
194		* TEST_ENG_OPENSSL_RC4_P_INIT - print a one line message to stderr each time
195		* the "init_key" handler is called.
196		* TEST_ENG_OPENSSL_RC4_P_CIPHER - ditto for the "cipher" handler.
197		*/
198		# include <openssl/rc4.h>
199	0	# define TEST_RC4_KEY_SIZE 16
200		typedef struct {
201		unsigned char key[TEST_RC4_KEY_SIZE];
202		RC4_KEY ks;
203		} TEST_RC4_KEY;
204	0	# define test(ctx) ((TEST_RC4_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx))
205		static int test_rc4_init_key(EVP_CIPHER_CTX ctx, const unsigned char key,
206		const unsigned char *iv, int enc)
207	0	{
208	0	const int n = EVP_CIPHER_CTX_get_key_length(ctx);
209
210	0	# ifdef TEST_ENG_OPENSSL_RC4_P_INIT
211	0	fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_init_key() called\n");
212	0	# endif
213	0	if (n <= 0)
214	0	return n;
215	0	memcpy(&test(ctx)->key[0], key, n);
216	0	RC4_set_key(&test(ctx)->ks, n, test(ctx)->key);
217	0	return 1;
218	0	}
219
220		static int test_rc4_cipher(EVP_CIPHER_CTX ctx, unsigned char out,
221		const unsigned char *in, size_t inl)
222	0	{
223		# ifdef TEST_ENG_OPENSSL_RC4_P_CIPHER
224		fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_cipher() called\n");
225		# endif
226	0	RC4(&test(ctx)->ks, inl, in, out);
227	0	return 1;
228	0	}
229
230		static EVP_CIPHER *r4_cipher = NULL;
231		static const EVP_CIPHER *test_r4_cipher(void)
232	0	{
233	0	if (r4_cipher == NULL) {
234	0	EVP_CIPHER *cipher;
235
236	0	if ((cipher = EVP_CIPHER_meth_new(NID_rc4, 1, TEST_RC4_KEY_SIZE)) == NULL
237	0	\|\| !EVP_CIPHER_meth_set_iv_length(cipher, 0)
238	0	\|\| !EVP_CIPHER_meth_set_flags(cipher, EVP_CIPH_VARIABLE_LENGTH)
239	0	\|\| !EVP_CIPHER_meth_set_init(cipher, test_rc4_init_key)
240	0	\|\| !EVP_CIPHER_meth_set_do_cipher(cipher, test_rc4_cipher)
241	0	\|\| !EVP_CIPHER_meth_set_impl_ctx_size(cipher, sizeof(TEST_RC4_KEY))) {
242	0	EVP_CIPHER_meth_free(cipher);
243	0	cipher = NULL;
244	0	}
245	0	r4_cipher = cipher;
246	0	}
247	0	return r4_cipher;
248	0	}
249		static void test_r4_cipher_destroy(void)
250	0	{
251	0	EVP_CIPHER_meth_free(r4_cipher);
252	0	r4_cipher = NULL;
253	0	}
254
255		static EVP_CIPHER *r4_40_cipher = NULL;
256		static const EVP_CIPHER *test_r4_40_cipher(void)
257	0	{
258	0	if (r4_40_cipher == NULL) {
259	0	EVP_CIPHER *cipher;
260
261	0	if ((cipher = EVP_CIPHER_meth_new(NID_rc4, 1, 5 /* 40 bits */)) == NULL
262	0	\|\| !EVP_CIPHER_meth_set_iv_length(cipher, 0)
263	0	\|\| !EVP_CIPHER_meth_set_flags(cipher, EVP_CIPH_VARIABLE_LENGTH)
264	0	\|\| !EVP_CIPHER_meth_set_init(cipher, test_rc4_init_key)
265	0	\|\| !EVP_CIPHER_meth_set_do_cipher(cipher, test_rc4_cipher)
266	0	\|\| !EVP_CIPHER_meth_set_impl_ctx_size(cipher, sizeof(TEST_RC4_KEY))) {
267	0	EVP_CIPHER_meth_free(cipher);
268	0	cipher = NULL;
269	0	}
270	0	r4_40_cipher = cipher;
271	0	}
272	0	return r4_40_cipher;
273	0	}
274		static void test_r4_40_cipher_destroy(void)
275	0	{
276	0	EVP_CIPHER_meth_free(r4_40_cipher);
277	0	r4_40_cipher = NULL;
278	0	}
279		static int test_cipher_nids(const int **nids)
280	0	{
281	0	static int cipher_nids[4] = { 0, 0, 0, 0 };
282	0	static int pos = 0;
283	0	static int init = 0;
284
285	0	if (!init) {
286	0	const EVP_CIPHER *cipher;
287	0	if ((cipher = test_r4_cipher()) != NULL)
288	0	cipher_nids[pos++] = EVP_CIPHER_get_nid(cipher);
289	0	if ((cipher = test_r4_40_cipher()) != NULL)
290	0	cipher_nids[pos++] = EVP_CIPHER_get_nid(cipher);
291	0	cipher_nids[pos] = 0;
292	0	init = 1;
293	0	}
294	0	*nids = cipher_nids;
295	0	return pos;
296	0	}
297
298		static int openssl_ciphers(ENGINE e, const EVP_CIPHER *cipher,
299		const int **nids, int nid)
300	0	{
301	0	if (!cipher) {
302		/* We are returning a list of supported nids */
303	0	return test_cipher_nids(nids);
304	0	}
305		/* We are being asked for a specific cipher */
306	0	if (nid == NID_rc4)
307	0	*cipher = test_r4_cipher();
308	0	else if (nid == NID_rc4_40)
309	0	*cipher = test_r4_40_cipher();
310	0	else {
311		# ifdef TEST_ENG_OPENSSL_RC4_OTHERS
312		fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) returning NULL for "
313		"nid %d\n", nid);
314		# endif
315	0	*cipher = NULL;
316	0	return 0;
317	0	}
318	0	return 1;
319	0	}
320		#endif
321
322		#ifdef TEST_ENG_OPENSSL_SHA
323		/* Much the same sort of comment as for TEST_ENG_OPENSSL_RC4 */
324		# include <openssl/sha.h>
325
326		static int test_sha1_init(EVP_MD_CTX *ctx)
327	0	{
328		# ifdef TEST_ENG_OPENSSL_SHA_P_INIT
329		fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_init() called\n");
330		# endif
331	0	return SHA1_Init(EVP_MD_CTX_get0_md_data(ctx));
332	0	}
333
334		static int test_sha1_update(EVP_MD_CTX ctx, const void data, size_t count)
335	0	{
336		# ifdef TEST_ENG_OPENSSL_SHA_P_UPDATE
337		fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_update() called\n");
338		# endif
339	0	return SHA1_Update(EVP_MD_CTX_get0_md_data(ctx), data, count);
340	0	}
341
342		static int test_sha1_final(EVP_MD_CTX ctx, unsigned char md)
343	0	{
344		# ifdef TEST_ENG_OPENSSL_SHA_P_FINAL
345		fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_final() called\n");
346		# endif
347	0	return SHA1_Final(md, EVP_MD_CTX_get0_md_data(ctx));
348	0	}
349
350		static EVP_MD *sha1_md = NULL;
351		static const EVP_MD *test_sha_md(void)
352	0	{
353	0	if (sha1_md == NULL) {
354	0	EVP_MD *md;
355
356	0	if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL
357	0	\|\| !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH)
358	0	\|\| !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK)
359	0	\|\| !EVP_MD_meth_set_app_datasize(md,
360	0	sizeof(EVP_MD *) + sizeof(SHA_CTX))
361	0	\|\| !EVP_MD_meth_set_flags(md, 0)
362	0	\|\| !EVP_MD_meth_set_init(md, test_sha1_init)
363	0	\|\| !EVP_MD_meth_set_update(md, test_sha1_update)
364	0	\|\| !EVP_MD_meth_set_final(md, test_sha1_final)) {
365	0	EVP_MD_meth_free(md);
366	0	md = NULL;
367	0	}
368	0	sha1_md = md;
369	0	}
370	0	return sha1_md;
371	0	}
372		static void test_sha_md_destroy(void)
373	0	{
374	0	EVP_MD_meth_free(sha1_md);
375	0	sha1_md = NULL;
376	0	}
377		static int test_digest_nids(const int **nids)
378	0	{
379	0	static int digest_nids[2] = { 0, 0 };
380	0	static int pos = 0;
381	0	static int init = 0;
382
383	0	if (!init) {
384	0	const EVP_MD *md;
385	0	if ((md = test_sha_md()) != NULL)
386	0	digest_nids[pos++] = EVP_MD_get_type(md);
387	0	digest_nids[pos] = 0;
388	0	init = 1;
389	0	}
390	0	*nids = digest_nids;
391	0	return pos;
392	0	}
393
394		static int openssl_digests(ENGINE e, const EVP_MD *digest,
395		const int **nids, int nid)
396	0	{
397	0	if (!digest) {
398		/* We are returning a list of supported nids */
399	0	return test_digest_nids(nids);
400	0	}
401		/* We are being asked for a specific digest */
402	0	if (nid == NID_sha1)
403	0	*digest = test_sha_md();
404	0	else {
405		# ifdef TEST_ENG_OPENSSL_SHA_OTHERS
406		fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) returning NULL for "
407		"nid %d\n", nid);
408		# endif
409	0	*digest = NULL;
410	0	return 0;
411	0	}
412	0	return 1;
413	0	}
414		#endif
415
416		#ifdef TEST_ENG_OPENSSL_PKEY
417		static EVP_PKEY openssl_load_privkey(ENGINE eng, const char *key_id,
418		UI_METHOD *ui_method,
419		void *callback_data)
420	0	{
421	0	BIO *in;
422	0	EVP_PKEY *key;
423	0	fprintf(stderr, "(TEST_ENG_OPENSSL_PKEY)Loading Private key %s\n",
424	0	key_id);
425	0	in = BIO_new_file(key_id, "r");
426	0	if (!in)
427	0	return NULL;
428	0	key = PEM_read_bio_PrivateKey(in, NULL, 0, NULL);
429	0	BIO_free(in);
430	0	return key;
431	0	}
432		#endif
433
434		#ifdef TEST_ENG_OPENSSL_HMAC
435
436		/*
437		* Experimental HMAC redirection implementation: mainly copied from
438		* hm_pmeth.c
439		*/
440
441		/* HMAC pkey context structure */
442
443		typedef struct {
444		const EVP_MD md; / MD for HMAC use */
445		ASN1_OCTET_STRING ktmp; /* Temp storage for key */
446		HMAC_CTX *ctx;
447		} OSSL_HMAC_PKEY_CTX;
448
449		static int ossl_hmac_init(EVP_PKEY_CTX *ctx)
450		{
451		OSSL_HMAC_PKEY_CTX *hctx;
452
453		if ((hctx = OPENSSL_zalloc(sizeof(*hctx))) == NULL)
454		return 0;
455		hctx->ktmp.type = V_ASN1_OCTET_STRING;
456		hctx->ctx = HMAC_CTX_new();
457		if (hctx->ctx == NULL) {
458		OPENSSL_free(hctx);
459		return 0;
460		}
461		EVP_PKEY_CTX_set_data(ctx, hctx);
462		EVP_PKEY_CTX_set0_keygen_info(ctx, NULL, 0);
463		# ifdef TEST_ENG_OPENSSL_HMAC_INIT
464		fprintf(stderr, "(TEST_ENG_OPENSSL_HMAC) ossl_hmac_init() called\n");
465		# endif
466		return 1;
467		}
468
469		static void ossl_hmac_cleanup(EVP_PKEY_CTX *ctx);
470
471		static int ossl_hmac_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src)
472		{
473		OSSL_HMAC_PKEY_CTX sctx, dctx;
474
475		/* allocate memory for dst->data and a new HMAC_CTX in dst->data->ctx */
476		if (!ossl_hmac_init(dst))
477		return 0;
478		sctx = EVP_PKEY_CTX_get_data(src);
479		dctx = EVP_PKEY_CTX_get_data(dst);
480		dctx->md = sctx->md;
481		if (!HMAC_CTX_copy(dctx->ctx, sctx->ctx))
482		goto err;
483		if (sctx->ktmp.data) {
484		if (!ASN1_OCTET_STRING_set(&dctx->ktmp,
485		sctx->ktmp.data, sctx->ktmp.length))
486		goto err;
487		}
488		return 1;
489		err:
490		/* release HMAC_CTX in dst->data->ctx and memory allocated for dst->data */
491		ossl_hmac_cleanup(dst);
492		return 0;
493		}
494
495		static void ossl_hmac_cleanup(EVP_PKEY_CTX *ctx)
496		{
497		OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
498
499		if (hctx) {
500		HMAC_CTX_free(hctx->ctx);
501		OPENSSL_clear_free(hctx->ktmp.data, hctx->ktmp.length);
502		OPENSSL_free(hctx);
503		EVP_PKEY_CTX_set_data(ctx, NULL);
504		}
505		}
506
507		static int ossl_hmac_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
508		{
509		ASN1_OCTET_STRING *hkey = NULL;
510		OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
511		if (!hctx->ktmp.data)
512		return 0;
513		hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
514		if (!hkey)
515		return 0;
516		EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);
517
518		return 1;
519		}
520
521		static int ossl_int_update(EVP_MD_CTX ctx, const void data, size_t count)
522		{
523		OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(EVP_MD_CTX_get_pkey_ctx(ctx));
524		if (!HMAC_Update(hctx->ctx, data, count))
525		return 0;
526		return 1;
527		}
528
529		static int ossl_hmac_signctx_init(EVP_PKEY_CTX ctx, EVP_MD_CTX mctx)
530		{
531		EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
532		EVP_MD_CTX_set_update_fn(mctx, ossl_int_update);
533		return 1;
534		}
535
536		static int ossl_hmac_signctx(EVP_PKEY_CTX ctx, unsigned char sig,
537		size_t siglen, EVP_MD_CTX mctx)
538		{
539		unsigned int hlen;
540		OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
541		int l = EVP_MD_CTX_get_size(mctx);
542
543		if (l < 0)
544		return 0;
545		*siglen = l;
546		if (!sig)
547		return 1;
548
549		if (!HMAC_Final(hctx->ctx, sig, &hlen))
550		return 0;
551		*siglen = (size_t)hlen;
552		return 1;
553		}
554
555		static int ossl_hmac_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
556		{
557		OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
558		EVP_PKEY *pk;
559		ASN1_OCTET_STRING *key;
560		switch (type) {
561
562		case EVP_PKEY_CTRL_SET_MAC_KEY:
563		if ((!p2 && p1 > 0) \|\| (p1 < -1))
564		return 0;
565		if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
566		return 0;
567		break;
568
569		case EVP_PKEY_CTRL_MD:
570		hctx->md = p2;
571		break;
572
573		case EVP_PKEY_CTRL_DIGESTINIT:
574		pk = EVP_PKEY_CTX_get0_pkey(ctx);
575		key = EVP_PKEY_get0(pk);
576		if (!HMAC_Init_ex(hctx->ctx, key->data, key->length, hctx->md, NULL))
577		return 0;
578		break;
579
580		default:
581		return -2;
582
583		}
584		return 1;
585		}
586
587		static int ossl_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
588		const char type, const char value)
589		{
590		if (!value) {
591		return 0;
592		}
593		if (strcmp(type, "key") == 0) {
594		void p = (void )value;
595		return ossl_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, -1, p);
596		}
597		if (strcmp(type, "hexkey") == 0) {
598		unsigned char *key;
599		int r;
600		long keylen;
601		key = OPENSSL_hexstr2buf(value, &keylen);
602		if (!key)
603		return 0;
604		r = ossl_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
605		OPENSSL_free(key);
606		return r;
607		}
608		return -2;
609		}
610
611		static EVP_PKEY_METHOD *ossl_hmac_meth;
612
613		static int ossl_register_hmac_meth(void)
614		{
615		EVP_PKEY_METHOD *meth;
616		meth = EVP_PKEY_meth_new(EVP_PKEY_HMAC, 0);
617		if (meth == NULL)
618		return 0;
619		EVP_PKEY_meth_set_init(meth, ossl_hmac_init);
620		EVP_PKEY_meth_set_copy(meth, ossl_hmac_copy);
621		EVP_PKEY_meth_set_cleanup(meth, ossl_hmac_cleanup);
622
623		EVP_PKEY_meth_set_keygen(meth, 0, ossl_hmac_keygen);
624
625		EVP_PKEY_meth_set_signctx(meth, ossl_hmac_signctx_init,
626		ossl_hmac_signctx);
627
628		EVP_PKEY_meth_set_ctrl(meth, ossl_hmac_ctrl, ossl_hmac_ctrl_str);
629		ossl_hmac_meth = meth;
630		return 1;
631		}
632
633		static int ossl_pkey_meths(ENGINE e, EVP_PKEY_METHOD *pmeth,
634		const int **nids, int nid)
635		{
636		static int ossl_pkey_nids[] = {
637		EVP_PKEY_HMAC,
638		0
639		};
640
641		if (pmeth == NULL) {
642		*nids = ossl_pkey_nids;
643		return 1;
644		}
645
646		if (nid == EVP_PKEY_HMAC) {
647		*pmeth = ossl_hmac_meth;
648		return 1;
649		}
650
651		*pmeth = NULL;
652		return 0;
653		}
654
655		#endif
656
657		int openssl_destroy(ENGINE *e)
658	0	{
659	0	test_sha_md_destroy();
660	0	#ifdef TEST_ENG_OPENSSL_RC4
661	0	test_r4_cipher_destroy();
662	0	test_r4_40_cipher_destroy();
663	0	#endif
664	0	return 1;
665	0	}
666