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openssl/engines/e_devcrypto.c
Taylor R Campbell 1636b355ad /dev/crypto: Suppress warning when open /dev/crypto fails with ENXIO. 
On NetBSD the device node is essentially always present, but these
days it's mostly not useful except for testing the kernel crypto
stack since the cost of CPU crypto has gone down much faster than the
cost of I/O to external crypto engines.  So on most systems it is
disabled in a way that makes open fail with ENXIO.  NetBSD has had
this warning for ENXIO patched away for years.

CLA: trivial

Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20636)
2023-03-31 12:23:45 +02:00

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/*
* Copyright 2017-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/* We need to use some deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED
#include "internal/e_os.h"
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <assert.h>
#include <openssl/conf.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/engine.h>
#include <openssl/objects.h>
#include "crypto/cryptodev.h"
#include "internal/nelem.h"
/* #define ENGINE_DEVCRYPTO_DEBUG */
#if CRYPTO_ALGORITHM_MIN < CRYPTO_ALGORITHM_MAX
# define CHECK_BSD_STYLE_MACROS
#endif
#define engine_devcrypto_id "devcrypto"
/*
* Use session2_op on FreeBSD which permits requesting specific
* drivers or classes of drivers at session creation time.
*/
#ifdef CIOCGSESSION2
typedef struct session2_op session_op_t;
#else
typedef struct session_op session_op_t;
#endif
/*
* ONE global file descriptor for all sessions. This allows operations
* such as digest session data copying (see digest_copy()), but is also
* saner... why re-open /dev/crypto for every session?
*/
static int cfd = -1;
#define DEVCRYPTO_REQUIRE_ACCELERATED 0 /* require confirmation of acceleration */
#define DEVCRYPTO_USE_SOFTWARE 1 /* allow software drivers */
#define DEVCRYPTO_REJECT_SOFTWARE 2 /* only disallow confirmed software drivers */
#define DEVCRYPTO_DEFAULT_USE_SOFTDRIVERS DEVCRYPTO_REJECT_SOFTWARE
static int use_softdrivers = DEVCRYPTO_DEFAULT_USE_SOFTDRIVERS;
/*
* cipher/digest status & acceleration definitions
* Make sure the defaults are set to 0
*/
struct driver_info_st {
enum devcrypto_status_t {
DEVCRYPTO_STATUS_FAILURE = -3, /* unusable for other reason */
DEVCRYPTO_STATUS_NO_CIOCCPHASH = -2, /* hash state copy not supported */
DEVCRYPTO_STATUS_NO_CIOCGSESSION = -1, /* session open failed */
DEVCRYPTO_STATUS_UNKNOWN = 0, /* not tested yet */
DEVCRYPTO_STATUS_USABLE = 1 /* algo can be used */
} status;
enum devcrypto_accelerated_t {
DEVCRYPTO_NOT_ACCELERATED = -1, /* software implemented */
DEVCRYPTO_ACCELERATION_UNKNOWN = 0, /* acceleration support unknown */
DEVCRYPTO_ACCELERATED = 1 /* hardware accelerated */
} accelerated;
char *driver_name;
};
#ifdef OPENSSL_NO_DYNAMIC_ENGINE
void engine_load_devcrypto_int(void);
#endif
static int clean_devcrypto_session(session_op_t *sess) {
if (ioctl(cfd, CIOCFSESSION, &sess->ses) < 0) {
ERR_raise_data(ERR_LIB_SYS, errno, "calling ioctl()");
return 0;
}
memset(sess, 0, sizeof(*sess));
return 1;
}
/******************************************************************************
*
* Ciphers
*
* Because they all do the same basic operation, we have only one set of
* method functions for them all to share, and a mapping table between
* NIDs and cryptodev IDs, with all the necessary size data.
*
*****/
struct cipher_ctx {
session_op_t sess;
int op; /* COP_ENCRYPT or COP_DECRYPT */
unsigned long mode; /* EVP_CIPH_*_MODE */
/* to handle ctr mode being a stream cipher */
unsigned char partial[EVP_MAX_BLOCK_LENGTH];
unsigned int blocksize, num;
};
static const struct cipher_data_st {
int nid;
int blocksize;
int keylen;
int ivlen;
int flags;
int devcryptoid;
} cipher_data[] = {
#ifndef OPENSSL_NO_DES
{ NID_des_cbc, 8, 8, 8, EVP_CIPH_CBC_MODE, CRYPTO_DES_CBC },
{ NID_des_ede3_cbc, 8, 24, 8, EVP_CIPH_CBC_MODE, CRYPTO_3DES_CBC },
#endif
#ifndef OPENSSL_NO_BF
{ NID_bf_cbc, 8, 16, 8, EVP_CIPH_CBC_MODE, CRYPTO_BLF_CBC },
#endif
#ifndef OPENSSL_NO_CAST
{ NID_cast5_cbc, 8, 16, 8, EVP_CIPH_CBC_MODE, CRYPTO_CAST_CBC },
#endif
{ NID_aes_128_cbc, 16, 128 / 8, 16, EVP_CIPH_CBC_MODE, CRYPTO_AES_CBC },
{ NID_aes_192_cbc, 16, 192 / 8, 16, EVP_CIPH_CBC_MODE, CRYPTO_AES_CBC },
{ NID_aes_256_cbc, 16, 256 / 8, 16, EVP_CIPH_CBC_MODE, CRYPTO_AES_CBC },
#ifndef OPENSSL_NO_RC4
{ NID_rc4, 1, 16, 0, EVP_CIPH_STREAM_CIPHER, CRYPTO_ARC4 },
#endif
#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_AES_CTR)
{ NID_aes_128_ctr, 16, 128 / 8, 16, EVP_CIPH_CTR_MODE, CRYPTO_AES_CTR },
{ NID_aes_192_ctr, 16, 192 / 8, 16, EVP_CIPH_CTR_MODE, CRYPTO_AES_CTR },
{ NID_aes_256_ctr, 16, 256 / 8, 16, EVP_CIPH_CTR_MODE, CRYPTO_AES_CTR },
#endif
#if 0 /* Not yet supported */
{ NID_aes_128_xts, 16, 128 / 8 * 2, 16, EVP_CIPH_XTS_MODE, CRYPTO_AES_XTS },
{ NID_aes_256_xts, 16, 256 / 8 * 2, 16, EVP_CIPH_XTS_MODE, CRYPTO_AES_XTS },
#endif
#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_AES_ECB)
{ NID_aes_128_ecb, 16, 128 / 8, 0, EVP_CIPH_ECB_MODE, CRYPTO_AES_ECB },
{ NID_aes_192_ecb, 16, 192 / 8, 0, EVP_CIPH_ECB_MODE, CRYPTO_AES_ECB },
{ NID_aes_256_ecb, 16, 256 / 8, 0, EVP_CIPH_ECB_MODE, CRYPTO_AES_ECB },
#endif
#if 0 /* Not yet supported */
{ NID_aes_128_gcm, 16, 128 / 8, 16, EVP_CIPH_GCM_MODE, CRYPTO_AES_GCM },
{ NID_aes_192_gcm, 16, 192 / 8, 16, EVP_CIPH_GCM_MODE, CRYPTO_AES_GCM },
{ NID_aes_256_gcm, 16, 256 / 8, 16, EVP_CIPH_GCM_MODE, CRYPTO_AES_GCM },
#endif
#ifndef OPENSSL_NO_CAMELLIA
{ NID_camellia_128_cbc, 16, 128 / 8, 16, EVP_CIPH_CBC_MODE,
CRYPTO_CAMELLIA_CBC },
{ NID_camellia_192_cbc, 16, 192 / 8, 16, EVP_CIPH_CBC_MODE,
CRYPTO_CAMELLIA_CBC },
{ NID_camellia_256_cbc, 16, 256 / 8, 16, EVP_CIPH_CBC_MODE,
CRYPTO_CAMELLIA_CBC },
#endif
};
static size_t find_cipher_data_index(int nid)
{
size_t i;
for (i = 0; i < OSSL_NELEM(cipher_data); i++)
if (nid == cipher_data[i].nid)
return i;
return (size_t)-1;
}
static size_t get_cipher_data_index(int nid)
{
size_t i = find_cipher_data_index(nid);
if (i != (size_t)-1)
return i;
/*
* Code further down must make sure that only NIDs in the table above
* are used. If any other NID reaches this function, there's a grave
* coding error further down.
*/
assert("Code that never should be reached" == NULL);
return -1;
}
static const struct cipher_data_st *get_cipher_data(int nid)
{
return &cipher_data[get_cipher_data_index(nid)];
}
/*
* Following are the three necessary functions to map OpenSSL functionality
* with cryptodev.
*/
static int cipher_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
struct cipher_ctx *cipher_ctx =
(struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
const struct cipher_data_st *cipher_d =
get_cipher_data(EVP_CIPHER_CTX_get_nid(ctx));
int ret;
/* cleanup a previous session */
if (cipher_ctx->sess.ses != 0 &&
clean_devcrypto_session(&cipher_ctx->sess) == 0)
return 0;
cipher_ctx->sess.cipher = cipher_d->devcryptoid;
cipher_ctx->sess.keylen = cipher_d->keylen;
cipher_ctx->sess.key = (void *)key;
cipher_ctx->op = enc ? COP_ENCRYPT : COP_DECRYPT;
cipher_ctx->mode = cipher_d->flags & EVP_CIPH_MODE;
cipher_ctx->blocksize = cipher_d->blocksize;
#ifdef CIOCGSESSION2
cipher_ctx->sess.crid = (use_softdrivers == DEVCRYPTO_USE_SOFTWARE) ?
CRYPTO_FLAG_SOFTWARE | CRYPTO_FLAG_HARDWARE :
CRYPTO_FLAG_HARDWARE;
ret = ioctl(cfd, CIOCGSESSION2, &cipher_ctx->sess);
#else
ret = ioctl(cfd, CIOCGSESSION, &cipher_ctx->sess);
#endif
if (ret < 0) {
ERR_raise_data(ERR_LIB_SYS, errno, "calling ioctl()");
return 0;
}
return 1;
}
static int cipher_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
struct cipher_ctx *cipher_ctx =
(struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
struct crypt_op cryp;
unsigned char *iv = EVP_CIPHER_CTX_iv_noconst(ctx);
#if !defined(COP_FLAG_WRITE_IV)
unsigned char saved_iv[EVP_MAX_IV_LENGTH];
const unsigned char *ivptr;
size_t nblocks, ivlen;
#endif
memset(&cryp, 0, sizeof(cryp));
cryp.ses = cipher_ctx->sess.ses;
cryp.len = inl;
cryp.src = (void *)in;
cryp.dst = (void *)out;
cryp.iv = (void *)iv;
cryp.op = cipher_ctx->op;
#if !defined(COP_FLAG_WRITE_IV)
cryp.flags = 0;
ivlen = EVP_CIPHER_CTX_get_iv_length(ctx);
if (ivlen > 0)
switch (cipher_ctx->mode) {
case EVP_CIPH_CBC_MODE:
assert(inl >= ivlen);
if (!EVP_CIPHER_CTX_is_encrypting(ctx)) {
ivptr = in + inl - ivlen;
memcpy(saved_iv, ivptr, ivlen);
}
break;
case EVP_CIPH_CTR_MODE:
break;
default: /* should not happen */
return 0;
}
#else
cryp.flags = COP_FLAG_WRITE_IV;
#endif
if (ioctl(cfd, CIOCCRYPT, &cryp) < 0) {
ERR_raise_data(ERR_LIB_SYS, errno, "calling ioctl()");
return 0;
}
#if !defined(COP_FLAG_WRITE_IV)
if (ivlen > 0)
switch (cipher_ctx->mode) {
case EVP_CIPH_CBC_MODE:
assert(inl >= ivlen);
if (EVP_CIPHER_CTX_is_encrypting(ctx))
ivptr = out + inl - ivlen;
else
ivptr = saved_iv;
memcpy(iv, ivptr, ivlen);
break;
case EVP_CIPH_CTR_MODE:
nblocks = (inl + cipher_ctx->blocksize - 1)
/ cipher_ctx->blocksize;
do {
ivlen--;
nblocks += iv[ivlen];
iv[ivlen] = (uint8_t) nblocks;
nblocks >>= 8;
} while (ivlen);
break;
default: /* should not happen */
return 0;
}
#endif
return 1;
}
static int ctr_do_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
struct cipher_ctx *cipher_ctx =
(struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
size_t nblocks, len;
/* initial partial block */
while (cipher_ctx->num && inl) {
(*out++) = *(in++) ^ cipher_ctx->partial[cipher_ctx->num];
--inl;
cipher_ctx->num = (cipher_ctx->num + 1) % cipher_ctx->blocksize;
}
/* full blocks */
if (inl > (unsigned int) cipher_ctx->blocksize) {
nblocks = inl/cipher_ctx->blocksize;
len = nblocks * cipher_ctx->blocksize;
if (cipher_do_cipher(ctx, out, in, len) < 1)
return 0;
inl -= len;
out += len;
in += len;
}
/* final partial block */
if (inl) {
memset(cipher_ctx->partial, 0, cipher_ctx->blocksize);
if (cipher_do_cipher(ctx, cipher_ctx->partial, cipher_ctx->partial,
cipher_ctx->blocksize) < 1)
return 0;
while (inl--) {
out[cipher_ctx->num] = in[cipher_ctx->num]
^ cipher_ctx->partial[cipher_ctx->num];
cipher_ctx->num++;
}
}
return 1;
}
static int cipher_ctrl(EVP_CIPHER_CTX *ctx, int type, int p1, void* p2)
{
struct cipher_ctx *cipher_ctx =
(struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
EVP_CIPHER_CTX *to_ctx = (EVP_CIPHER_CTX *)p2;
struct cipher_ctx *to_cipher_ctx;
switch (type) {
case EVP_CTRL_COPY:
if (cipher_ctx == NULL)
return 1;
/* when copying the context, a new session needs to be initialized */
to_cipher_ctx =
(struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(to_ctx);
memset(&to_cipher_ctx->sess, 0, sizeof(to_cipher_ctx->sess));
return cipher_init(to_ctx, (void *)cipher_ctx->sess.key, EVP_CIPHER_CTX_iv(ctx),
(cipher_ctx->op == COP_ENCRYPT));
case EVP_CTRL_INIT:
memset(&cipher_ctx->sess, 0, sizeof(cipher_ctx->sess));
return 1;
default:
break;
}
return -1;
}
static int cipher_cleanup(EVP_CIPHER_CTX *ctx)
{
struct cipher_ctx *cipher_ctx =
(struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
return clean_devcrypto_session(&cipher_ctx->sess);
}
/*
* Keep tables of known nids, associated methods, selected ciphers, and driver
* info.
* Note that known_cipher_nids[] isn't necessarily indexed the same way as
* cipher_data[] above, which the other tables are.
*/
static int known_cipher_nids[OSSL_NELEM(cipher_data)];
static int known_cipher_nids_amount = -1; /* -1 indicates not yet initialised */
static EVP_CIPHER *known_cipher_methods[OSSL_NELEM(cipher_data)] = { NULL, };
static int selected_ciphers[OSSL_NELEM(cipher_data)];
static struct driver_info_st cipher_driver_info[OSSL_NELEM(cipher_data)];
static int devcrypto_test_cipher(size_t cipher_data_index)
{
return (cipher_driver_info[cipher_data_index].status == DEVCRYPTO_STATUS_USABLE
&& selected_ciphers[cipher_data_index] == 1
&& (cipher_driver_info[cipher_data_index].accelerated
== DEVCRYPTO_ACCELERATED
|| use_softdrivers == DEVCRYPTO_USE_SOFTWARE
|| (cipher_driver_info[cipher_data_index].accelerated
!= DEVCRYPTO_NOT_ACCELERATED
&& use_softdrivers == DEVCRYPTO_REJECT_SOFTWARE)));
}
static void prepare_cipher_methods(void)
{
size_t i;
session_op_t sess;
unsigned long cipher_mode;
#ifdef CIOCGSESSION2
struct crypt_find_op fop;
enum devcrypto_accelerated_t accelerated;
#elif defined(CIOCGSESSINFO)
struct session_info_op siop;
#endif
memset(&cipher_driver_info, 0, sizeof(cipher_driver_info));
memset(&sess, 0, sizeof(sess));
sess.key = (void *)"01234567890123456789012345678901234567890123456789";
for (i = 0, known_cipher_nids_amount = 0;
i < OSSL_NELEM(cipher_data); i++) {
selected_ciphers[i] = 1;
/*
* Check that the cipher is usable
*/
sess.cipher = cipher_data[i].devcryptoid;
sess.keylen = cipher_data[i].keylen;
#ifdef CIOCGSESSION2
/*
* When using CIOCGSESSION2, first try to allocate a hardware
* ("accelerated") session. If that fails, fall back to
* allocating a software session.
*/
sess.crid = CRYPTO_FLAG_HARDWARE;
if (ioctl(cfd, CIOCGSESSION2, &sess) == 0) {
accelerated = DEVCRYPTO_ACCELERATED;
} else {
sess.crid = CRYPTO_FLAG_SOFTWARE;
if (ioctl(cfd, CIOCGSESSION2, &sess) < 0) {
cipher_driver_info[i].status = DEVCRYPTO_STATUS_NO_CIOCGSESSION;
continue;
}
accelerated = DEVCRYPTO_NOT_ACCELERATED;
}
#else
if (ioctl(cfd, CIOCGSESSION, &sess) < 0) {
cipher_driver_info[i].status = DEVCRYPTO_STATUS_NO_CIOCGSESSION;
continue;
}
#endif
cipher_mode = cipher_data[i].flags & EVP_CIPH_MODE;
if ((known_cipher_methods[i] =
EVP_CIPHER_meth_new(cipher_data[i].nid,
cipher_mode == EVP_CIPH_CTR_MODE ? 1 :
cipher_data[i].blocksize,
cipher_data[i].keylen)) == NULL
|| !EVP_CIPHER_meth_set_iv_length(known_cipher_methods[i],
cipher_data[i].ivlen)
|| !EVP_CIPHER_meth_set_flags(known_cipher_methods[i],
cipher_data[i].flags
| EVP_CIPH_CUSTOM_COPY
| EVP_CIPH_CTRL_INIT
| EVP_CIPH_FLAG_DEFAULT_ASN1)
|| !EVP_CIPHER_meth_set_init(known_cipher_methods[i], cipher_init)
|| !EVP_CIPHER_meth_set_do_cipher(known_cipher_methods[i],
cipher_mode == EVP_CIPH_CTR_MODE ?
ctr_do_cipher :
cipher_do_cipher)
|| !EVP_CIPHER_meth_set_ctrl(known_cipher_methods[i], cipher_ctrl)
|| !EVP_CIPHER_meth_set_cleanup(known_cipher_methods[i],
cipher_cleanup)
|| !EVP_CIPHER_meth_set_impl_ctx_size(known_cipher_methods[i],
sizeof(struct cipher_ctx))) {
cipher_driver_info[i].status = DEVCRYPTO_STATUS_FAILURE;
EVP_CIPHER_meth_free(known_cipher_methods[i]);
known_cipher_methods[i] = NULL;
} else {
cipher_driver_info[i].status = DEVCRYPTO_STATUS_USABLE;
#ifdef CIOCGSESSION2
cipher_driver_info[i].accelerated = accelerated;
fop.crid = sess.crid;
if (ioctl(cfd, CIOCFINDDEV, &fop) == 0) {
cipher_driver_info[i].driver_name =
OPENSSL_strndup(fop.name, sizeof(fop.name));
}
#elif defined(CIOCGSESSINFO)
siop.ses = sess.ses;
if (ioctl(cfd, CIOCGSESSINFO, &siop) < 0) {
cipher_driver_info[i].accelerated = DEVCRYPTO_ACCELERATION_UNKNOWN;
} else {
cipher_driver_info[i].driver_name =
OPENSSL_strndup(siop.cipher_info.cra_driver_name,
CRYPTODEV_MAX_ALG_NAME);
if (!(siop.flags & SIOP_FLAG_KERNEL_DRIVER_ONLY))
cipher_driver_info[i].accelerated = DEVCRYPTO_NOT_ACCELERATED;
else
cipher_driver_info[i].accelerated = DEVCRYPTO_ACCELERATED;
}
#endif /* CIOCGSESSINFO */
}
ioctl(cfd, CIOCFSESSION, &sess.ses);
if (devcrypto_test_cipher(i)) {
known_cipher_nids[known_cipher_nids_amount++] =
cipher_data[i].nid;
}
}
}
static void rebuild_known_cipher_nids(ENGINE *e)
{
size_t i;
for (i = 0, known_cipher_nids_amount = 0; i < OSSL_NELEM(cipher_data); i++) {
if (devcrypto_test_cipher(i))
known_cipher_nids[known_cipher_nids_amount++] = cipher_data[i].nid;
}
ENGINE_unregister_ciphers(e);
ENGINE_register_ciphers(e);
}
static const EVP_CIPHER *get_cipher_method(int nid)
{
size_t i = get_cipher_data_index(nid);
if (i == (size_t)-1)
return NULL;
return known_cipher_methods[i];
}
static int get_cipher_nids(const int **nids)
{
*nids = known_cipher_nids;
return known_cipher_nids_amount;
}
static void destroy_cipher_method(int nid)
{
size_t i = get_cipher_data_index(nid);
EVP_CIPHER_meth_free(known_cipher_methods[i]);
known_cipher_methods[i] = NULL;
}
static void destroy_all_cipher_methods(void)
{
size_t i;
for (i = 0; i < OSSL_NELEM(cipher_data); i++) {
destroy_cipher_method(cipher_data[i].nid);
OPENSSL_free(cipher_driver_info[i].driver_name);
cipher_driver_info[i].driver_name = NULL;
}
}
static int devcrypto_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
const int **nids, int nid)
{
if (cipher == NULL)
return get_cipher_nids(nids);
*cipher = get_cipher_method(nid);
return *cipher != NULL;
}
static void devcrypto_select_all_ciphers(int *cipher_list)
{
size_t i;
for (i = 0; i < OSSL_NELEM(cipher_data); i++)
cipher_list[i] = 1;
}
static int cryptodev_select_cipher_cb(const char *str, int len, void *usr)
{
int *cipher_list = (int *)usr;
char *name;
const EVP_CIPHER *EVP;
size_t i;
if (len == 0)
return 1;
if (usr == NULL || (name = OPENSSL_strndup(str, len)) == NULL)
return 0;
EVP = EVP_get_cipherbyname(name);
if (EVP == NULL)
fprintf(stderr, "devcrypto: unknown cipher %s\n", name);
else if ((i = find_cipher_data_index(EVP_CIPHER_get_nid(EVP))) != (size_t)-1)
cipher_list[i] = 1;
else
fprintf(stderr, "devcrypto: cipher %s not available\n", name);
OPENSSL_free(name);
return 1;
}
static void dump_cipher_info(void)
{
size_t i;
const char *name;
fprintf (stderr, "Information about ciphers supported by the /dev/crypto"
" engine:\n");
#ifndef CIOCGSESSINFO
fprintf(stderr, "CIOCGSESSINFO (session info call) unavailable\n");
#endif
for (i = 0; i < OSSL_NELEM(cipher_data); i++) {
name = OBJ_nid2sn(cipher_data[i].nid);
fprintf (stderr, "Cipher %s, NID=%d, /dev/crypto info: id=%d, ",
name ? name : "unknown", cipher_data[i].nid,
cipher_data[i].devcryptoid);
if (cipher_driver_info[i].status == DEVCRYPTO_STATUS_NO_CIOCGSESSION) {
fprintf (stderr, "CIOCGSESSION (session open call) failed\n");
continue;
}
fprintf (stderr, "driver=%s ", cipher_driver_info[i].driver_name ?
cipher_driver_info[i].driver_name : "unknown");
if (cipher_driver_info[i].accelerated == DEVCRYPTO_ACCELERATED)
fprintf(stderr, "(hw accelerated)");
else if (cipher_driver_info[i].accelerated == DEVCRYPTO_NOT_ACCELERATED)
fprintf(stderr, "(software)");
else
fprintf(stderr, "(acceleration status unknown)");
if (cipher_driver_info[i].status == DEVCRYPTO_STATUS_FAILURE)
fprintf (stderr, ". Cipher setup failed");
fprintf(stderr, "\n");
}
fprintf(stderr, "\n");
}
/*
* We only support digests if the cryptodev implementation supports multiple
* data updates and session copying. Otherwise, we would be forced to maintain
* a cache, which is perilous if there's a lot of data coming in (if someone
* wants to checksum an OpenSSL tarball, for example).
*/
#if defined(CIOCCPHASH) && defined(COP_FLAG_UPDATE) && defined(COP_FLAG_FINAL)
#define IMPLEMENT_DIGEST
/******************************************************************************
*
* Digests
*
* Because they all do the same basic operation, we have only one set of
* method functions for them all to share, and a mapping table between
* NIDs and cryptodev IDs, with all the necessary size data.
*
*****/
struct digest_ctx {
session_op_t sess;
/* This signals that the init function was called, not that it succeeded. */
int init_called;
unsigned char digest_res[HASH_MAX_LEN];
};
static const struct digest_data_st {
int nid;
int blocksize;
int digestlen;
int devcryptoid;
} digest_data[] = {
#ifndef OPENSSL_NO_MD5
{ NID_md5, /* MD5_CBLOCK */ 64, 16, CRYPTO_MD5 },
#endif
{ NID_sha1, SHA_CBLOCK, 20, CRYPTO_SHA1 },
#ifndef OPENSSL_NO_RMD160
# if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_RIPEMD160)
{ NID_ripemd160, /* RIPEMD160_CBLOCK */ 64, 20, CRYPTO_RIPEMD160 },
# endif
#endif
#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_SHA2_224)
{ NID_sha224, SHA256_CBLOCK, 224 / 8, CRYPTO_SHA2_224 },
#endif
#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_SHA2_256)
{ NID_sha256, SHA256_CBLOCK, 256 / 8, CRYPTO_SHA2_256 },
#endif
#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_SHA2_384)
{ NID_sha384, SHA512_CBLOCK, 384 / 8, CRYPTO_SHA2_384 },
#endif
#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_SHA2_512)
{ NID_sha512, SHA512_CBLOCK, 512 / 8, CRYPTO_SHA2_512 },
#endif
};
static size_t find_digest_data_index(int nid)
{
size_t i;
for (i = 0; i < OSSL_NELEM(digest_data); i++)
if (nid == digest_data[i].nid)
return i;
return (size_t)-1;
}
static size_t get_digest_data_index(int nid)
{
size_t i = find_digest_data_index(nid);
if (i != (size_t)-1)
return i;
/*
* Code further down must make sure that only NIDs in the table above
* are used. If any other NID reaches this function, there's a grave
* coding error further down.
*/
assert("Code that never should be reached" == NULL);
return -1;
}
static const struct digest_data_st *get_digest_data(int nid)
{
return &digest_data[get_digest_data_index(nid)];
}
/*
* Following are the five necessary functions to map OpenSSL functionality
* with cryptodev: init, update, final, cleanup, and copy.
*/
static int digest_init(EVP_MD_CTX *ctx)
{
struct digest_ctx *digest_ctx =
(struct digest_ctx *)EVP_MD_CTX_get0_md_data(ctx);
const struct digest_data_st *digest_d =
get_digest_data(EVP_MD_CTX_get_type(ctx));
digest_ctx->init_called = 1;
memset(&digest_ctx->sess, 0, sizeof(digest_ctx->sess));
digest_ctx->sess.mac = digest_d->devcryptoid;
if (ioctl(cfd, CIOCGSESSION, &digest_ctx->sess) < 0) {
ERR_raise_data(ERR_LIB_SYS, errno, "calling ioctl()");
return 0;
}
return 1;
}
static int digest_op(struct digest_ctx *ctx, const void *src, size_t srclen,
void *res, unsigned int flags)
{
struct crypt_op cryp;
memset(&cryp, 0, sizeof(cryp));
cryp.ses = ctx->sess.ses;
cryp.len = srclen;
cryp.src = (void *)src;
cryp.dst = NULL;
cryp.mac = res;
cryp.flags = flags;
return ioctl(cfd, CIOCCRYPT, &cryp);
}
static int digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
{
struct digest_ctx *digest_ctx =
(struct digest_ctx *)EVP_MD_CTX_get0_md_data(ctx);
if (count == 0)
return 1;
if (digest_ctx == NULL)
return 0;
if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT)) {
if (digest_op(digest_ctx, data, count, digest_ctx->digest_res, 0) >= 0)
return 1;
} else if (digest_op(digest_ctx, data, count, NULL, COP_FLAG_UPDATE) >= 0) {
return 1;
}
ERR_raise_data(ERR_LIB_SYS, errno, "calling ioctl()");
return 0;
}
static int digest_final(EVP_MD_CTX *ctx, unsigned char *md)
{
struct digest_ctx *digest_ctx =
(struct digest_ctx *)EVP_MD_CTX_get0_md_data(ctx);
if (md == NULL || digest_ctx == NULL)
return 0;
if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT)) {
memcpy(md, digest_ctx->digest_res, EVP_MD_CTX_get_size(ctx));
} else if (digest_op(digest_ctx, NULL, 0, md, COP_FLAG_FINAL) < 0) {
ERR_raise_data(ERR_LIB_SYS, errno, "calling ioctl()");
return 0;
}
return 1;
}
static int digest_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from)
{
struct digest_ctx *digest_from =
(struct digest_ctx *)EVP_MD_CTX_get0_md_data(from);
struct digest_ctx *digest_to =
(struct digest_ctx *)EVP_MD_CTX_get0_md_data(to);
struct cphash_op cphash;
if (digest_from == NULL || digest_from->init_called != 1)
return 1;
if (!digest_init(to)) {
ERR_raise_data(ERR_LIB_SYS, errno, "calling ioctl()");
return 0;
}
cphash.src_ses = digest_from->sess.ses;
cphash.dst_ses = digest_to->sess.ses;
if (ioctl(cfd, CIOCCPHASH, &cphash) < 0) {
ERR_raise_data(ERR_LIB_SYS, errno, "calling ioctl()");
return 0;
}
return 1;
}
static int digest_cleanup(EVP_MD_CTX *ctx)
{
struct digest_ctx *digest_ctx =
(struct digest_ctx *)EVP_MD_CTX_get0_md_data(ctx);
if (digest_ctx == NULL)
return 1;
return clean_devcrypto_session(&digest_ctx->sess);
}
/*
* Keep tables of known nids, associated methods, selected digests, and
* driver info.
* Note that known_digest_nids[] isn't necessarily indexed the same way as
* digest_data[] above, which the other tables are.
*/
static int known_digest_nids[OSSL_NELEM(digest_data)];
static int known_digest_nids_amount = -1; /* -1 indicates not yet initialised */
static EVP_MD *known_digest_methods[OSSL_NELEM(digest_data)] = { NULL, };
static int selected_digests[OSSL_NELEM(digest_data)];
static struct driver_info_st digest_driver_info[OSSL_NELEM(digest_data)];
static int devcrypto_test_digest(size_t digest_data_index)
{
return (digest_driver_info[digest_data_index].status == DEVCRYPTO_STATUS_USABLE
&& selected_digests[digest_data_index] == 1
&& (digest_driver_info[digest_data_index].accelerated
== DEVCRYPTO_ACCELERATED
|| use_softdrivers == DEVCRYPTO_USE_SOFTWARE
|| (digest_driver_info[digest_data_index].accelerated
!= DEVCRYPTO_NOT_ACCELERATED
&& use_softdrivers == DEVCRYPTO_REJECT_SOFTWARE)));
}
static void rebuild_known_digest_nids(ENGINE *e)
{
size_t i;
for (i = 0, known_digest_nids_amount = 0; i < OSSL_NELEM(digest_data); i++) {
if (devcrypto_test_digest(i))
known_digest_nids[known_digest_nids_amount++] = digest_data[i].nid;
}
ENGINE_unregister_digests(e);
ENGINE_register_digests(e);
}
static void prepare_digest_methods(void)
{
size_t i;
session_op_t sess1, sess2;
#ifdef CIOCGSESSINFO
struct session_info_op siop;
#endif
struct cphash_op cphash;
memset(&digest_driver_info, 0, sizeof(digest_driver_info));
memset(&sess1, 0, sizeof(sess1));
memset(&sess2, 0, sizeof(sess2));
for (i = 0, known_digest_nids_amount = 0; i < OSSL_NELEM(digest_data);
i++) {
selected_digests[i] = 1;
/*
* Check that the digest is usable
*/
sess1.mac = digest_data[i].devcryptoid;
sess2.ses = 0;
if (ioctl(cfd, CIOCGSESSION, &sess1) < 0) {
digest_driver_info[i].status = DEVCRYPTO_STATUS_NO_CIOCGSESSION;
goto finish;
}
#ifdef CIOCGSESSINFO
/* gather hardware acceleration info from the driver */
siop.ses = sess1.ses;
if (ioctl(cfd, CIOCGSESSINFO, &siop) < 0) {
digest_driver_info[i].accelerated = DEVCRYPTO_ACCELERATION_UNKNOWN;
} else {
digest_driver_info[i].driver_name =
OPENSSL_strndup(siop.hash_info.cra_driver_name,
CRYPTODEV_MAX_ALG_NAME);
if (siop.flags & SIOP_FLAG_KERNEL_DRIVER_ONLY)
digest_driver_info[i].accelerated = DEVCRYPTO_ACCELERATED;
else
digest_driver_info[i].accelerated = DEVCRYPTO_NOT_ACCELERATED;
}
#endif
/* digest must be capable of hash state copy */
sess2.mac = sess1.mac;
if (ioctl(cfd, CIOCGSESSION, &sess2) < 0) {
digest_driver_info[i].status = DEVCRYPTO_STATUS_FAILURE;
goto finish;
}
cphash.src_ses = sess1.ses;
cphash.dst_ses = sess2.ses;
if (ioctl(cfd, CIOCCPHASH, &cphash) < 0) {
digest_driver_info[i].status = DEVCRYPTO_STATUS_NO_CIOCCPHASH;
goto finish;
}
if ((known_digest_methods[i] = EVP_MD_meth_new(digest_data[i].nid,
NID_undef)) == NULL
|| !EVP_MD_meth_set_input_blocksize(known_digest_methods[i],
digest_data[i].blocksize)
|| !EVP_MD_meth_set_result_size(known_digest_methods[i],
digest_data[i].digestlen)
|| !EVP_MD_meth_set_init(known_digest_methods[i], digest_init)
|| !EVP_MD_meth_set_update(known_digest_methods[i], digest_update)
|| !EVP_MD_meth_set_final(known_digest_methods[i], digest_final)
|| !EVP_MD_meth_set_copy(known_digest_methods[i], digest_copy)
|| !EVP_MD_meth_set_cleanup(known_digest_methods[i], digest_cleanup)
|| !EVP_MD_meth_set_app_datasize(known_digest_methods[i],
sizeof(struct digest_ctx))) {
digest_driver_info[i].status = DEVCRYPTO_STATUS_FAILURE;
EVP_MD_meth_free(known_digest_methods[i]);
known_digest_methods[i] = NULL;
goto finish;
}
digest_driver_info[i].status = DEVCRYPTO_STATUS_USABLE;
finish:
ioctl(cfd, CIOCFSESSION, &sess1.ses);
if (sess2.ses != 0)
ioctl(cfd, CIOCFSESSION, &sess2.ses);
if (devcrypto_test_digest(i))
known_digest_nids[known_digest_nids_amount++] = digest_data[i].nid;
}
}
static const EVP_MD *get_digest_method(int nid)
{
size_t i = get_digest_data_index(nid);
if (i == (size_t)-1)
return NULL;
return known_digest_methods[i];
}
static int get_digest_nids(const int **nids)
{
*nids = known_digest_nids;
return known_digest_nids_amount;
}
static void destroy_digest_method(int nid)
{
size_t i = get_digest_data_index(nid);
EVP_MD_meth_free(known_digest_methods[i]);
known_digest_methods[i] = NULL;
}
static void destroy_all_digest_methods(void)
{
size_t i;
for (i = 0; i < OSSL_NELEM(digest_data); i++) {
destroy_digest_method(digest_data[i].nid);
OPENSSL_free(digest_driver_info[i].driver_name);
digest_driver_info[i].driver_name = NULL;
}
}
static int devcrypto_digests(ENGINE *e, const EVP_MD **digest,
const int **nids, int nid)
{
if (digest == NULL)
return get_digest_nids(nids);
*digest = get_digest_method(nid);
return *digest != NULL;
}
static void devcrypto_select_all_digests(int *digest_list)
{
size_t i;
for (i = 0; i < OSSL_NELEM(digest_data); i++)
digest_list[i] = 1;
}
static int cryptodev_select_digest_cb(const char *str, int len, void *usr)
{
int *digest_list = (int *)usr;
char *name;
const EVP_MD *EVP;
size_t i;
if (len == 0)
return 1;
if (usr == NULL || (name = OPENSSL_strndup(str, len)) == NULL)
return 0;
EVP = EVP_get_digestbyname(name);
if (EVP == NULL)
fprintf(stderr, "devcrypto: unknown digest %s\n", name);
else if ((i = find_digest_data_index(EVP_MD_get_type(EVP))) != (size_t)-1)
digest_list[i] = 1;
else
fprintf(stderr, "devcrypto: digest %s not available\n", name);
OPENSSL_free(name);
return 1;
}
static void dump_digest_info(void)
{
size_t i;
const char *name;
fprintf (stderr, "Information about digests supported by the /dev/crypto"
" engine:\n");
#ifndef CIOCGSESSINFO
fprintf(stderr, "CIOCGSESSINFO (session info call) unavailable\n");
#endif
for (i = 0; i < OSSL_NELEM(digest_data); i++) {
name = OBJ_nid2sn(digest_data[i].nid);
fprintf (stderr, "Digest %s, NID=%d, /dev/crypto info: id=%d, driver=%s",
name ? name : "unknown", digest_data[i].nid,
digest_data[i].devcryptoid,
digest_driver_info[i].driver_name ? digest_driver_info[i].driver_name : "unknown");
if (digest_driver_info[i].status == DEVCRYPTO_STATUS_NO_CIOCGSESSION) {
fprintf (stderr, ". CIOCGSESSION (session open) failed\n");
continue;
}
if (digest_driver_info[i].accelerated == DEVCRYPTO_ACCELERATED)
fprintf(stderr, " (hw accelerated)");
else if (digest_driver_info[i].accelerated == DEVCRYPTO_NOT_ACCELERATED)
fprintf(stderr, " (software)");
else
fprintf(stderr, " (acceleration status unknown)");
if (cipher_driver_info[i].status == DEVCRYPTO_STATUS_FAILURE)
fprintf (stderr, ". Cipher setup failed\n");
else if (digest_driver_info[i].status == DEVCRYPTO_STATUS_NO_CIOCCPHASH)
fprintf(stderr, ", CIOCCPHASH failed\n");
else
fprintf(stderr, ", CIOCCPHASH capable\n");
}
fprintf(stderr, "\n");
}
#endif
/******************************************************************************
*
* CONTROL COMMANDS
*
*****/
#define DEVCRYPTO_CMD_USE_SOFTDRIVERS ENGINE_CMD_BASE
#define DEVCRYPTO_CMD_CIPHERS (ENGINE_CMD_BASE + 1)
#define DEVCRYPTO_CMD_DIGESTS (ENGINE_CMD_BASE + 2)
#define DEVCRYPTO_CMD_DUMP_INFO (ENGINE_CMD_BASE + 3)
static const ENGINE_CMD_DEFN devcrypto_cmds[] = {
#if defined(CIOCGSESSINFO) || defined(CIOCGSESSION2)
{DEVCRYPTO_CMD_USE_SOFTDRIVERS,
"USE_SOFTDRIVERS",
"specifies whether to use software (not accelerated) drivers ("
OPENSSL_MSTR(DEVCRYPTO_REQUIRE_ACCELERATED) "=use only accelerated drivers, "
OPENSSL_MSTR(DEVCRYPTO_USE_SOFTWARE) "=allow all drivers, "
OPENSSL_MSTR(DEVCRYPTO_REJECT_SOFTWARE)
"=use if acceleration can't be determined) [default="
OPENSSL_MSTR(DEVCRYPTO_DEFAULT_USE_SOFTDRIVERS) "]",
ENGINE_CMD_FLAG_NUMERIC},
#endif
{DEVCRYPTO_CMD_CIPHERS,
"CIPHERS",
"either ALL, NONE, or a comma-separated list of ciphers to enable [default=ALL]",
ENGINE_CMD_FLAG_STRING},
#ifdef IMPLEMENT_DIGEST
{DEVCRYPTO_CMD_DIGESTS,
"DIGESTS",
"either ALL, NONE, or a comma-separated list of digests to enable [default=ALL]",
ENGINE_CMD_FLAG_STRING},
#endif
{DEVCRYPTO_CMD_DUMP_INFO,
"DUMP_INFO",
"dump info about each algorithm to stderr; use 'openssl engine -pre DUMP_INFO devcrypto'",
ENGINE_CMD_FLAG_NO_INPUT},
{0, NULL, NULL, 0}
};
static int devcrypto_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void))
{
int *new_list;
switch (cmd) {
#if defined(CIOCGSESSINFO) || defined(CIOCGSESSION2)
case DEVCRYPTO_CMD_USE_SOFTDRIVERS:
switch (i) {
case DEVCRYPTO_REQUIRE_ACCELERATED:
case DEVCRYPTO_USE_SOFTWARE:
case DEVCRYPTO_REJECT_SOFTWARE:
break;
default:
fprintf(stderr, "devcrypto: invalid value (%ld) for USE_SOFTDRIVERS\n", i);
return 0;
}
if (use_softdrivers == i)
return 1;
use_softdrivers = i;
#ifdef IMPLEMENT_DIGEST
rebuild_known_digest_nids(e);
#endif
rebuild_known_cipher_nids(e);
return 1;
#endif /* CIOCGSESSINFO || CIOCGSESSION2 */
case DEVCRYPTO_CMD_CIPHERS:
if (p == NULL)
return 1;
if (OPENSSL_strcasecmp((const char *)p, "ALL") == 0) {
devcrypto_select_all_ciphers(selected_ciphers);
} else if (OPENSSL_strcasecmp((const char*)p, "NONE") == 0) {
memset(selected_ciphers, 0, sizeof(selected_ciphers));
} else {
new_list=OPENSSL_zalloc(sizeof(selected_ciphers));
if (!CONF_parse_list(p, ',', 1, cryptodev_select_cipher_cb, new_list)) {
OPENSSL_free(new_list);
return 0;
}
memcpy(selected_ciphers, new_list, sizeof(selected_ciphers));
OPENSSL_free(new_list);
}
rebuild_known_cipher_nids(e);
return 1;
#ifdef IMPLEMENT_DIGEST
case DEVCRYPTO_CMD_DIGESTS:
if (p == NULL)
return 1;
if (OPENSSL_strcasecmp((const char *)p, "ALL") == 0) {
devcrypto_select_all_digests(selected_digests);
} else if (OPENSSL_strcasecmp((const char*)p, "NONE") == 0) {
memset(selected_digests, 0, sizeof(selected_digests));
} else {
new_list=OPENSSL_zalloc(sizeof(selected_digests));
if (!CONF_parse_list(p, ',', 1, cryptodev_select_digest_cb, new_list)) {
OPENSSL_free(new_list);
return 0;
}
memcpy(selected_digests, new_list, sizeof(selected_digests));
OPENSSL_free(new_list);
}
rebuild_known_digest_nids(e);
return 1;
#endif /* IMPLEMENT_DIGEST */
case DEVCRYPTO_CMD_DUMP_INFO:
dump_cipher_info();
#ifdef IMPLEMENT_DIGEST
dump_digest_info();
#endif
return 1;
default:
break;
}
return 0;
}
/******************************************************************************
*
* LOAD / UNLOAD
*
*****/
/*
* Opens /dev/crypto
*/
static int open_devcrypto(void)
{
int fd;
if (cfd >= 0)
return 1;
if ((fd = open("/dev/crypto", O_RDWR, 0)) < 0) {
#ifndef ENGINE_DEVCRYPTO_DEBUG
if (errno != ENOENT && errno != ENXIO)
#endif
fprintf(stderr, "Could not open /dev/crypto: %s\n", strerror(errno));
return 0;
}
#ifdef CRIOGET
if (ioctl(fd, CRIOGET, &cfd) < 0) {
fprintf(stderr, "Could not create crypto fd: %s\n", strerror(errno));
close(fd);
cfd = -1;
return 0;
}
close(fd);
#else
cfd = fd;
#endif
return 1;
}
static int close_devcrypto(void)
{
int ret;
if (cfd < 0)
return 1;
ret = close(cfd);
cfd = -1;
if (ret != 0) {
fprintf(stderr, "Error closing /dev/crypto: %s\n", strerror(errno));
return 0;
}
return 1;
}
static int devcrypto_unload(ENGINE *e)
{
destroy_all_cipher_methods();
#ifdef IMPLEMENT_DIGEST
destroy_all_digest_methods();
#endif
close_devcrypto();
return 1;
}
static int bind_devcrypto(ENGINE *e) {
if (!ENGINE_set_id(e, engine_devcrypto_id)
|| !ENGINE_set_name(e, "/dev/crypto engine")
|| !ENGINE_set_destroy_function(e, devcrypto_unload)
|| !ENGINE_set_cmd_defns(e, devcrypto_cmds)
|| !ENGINE_set_ctrl_function(e, devcrypto_ctrl))
return 0;
prepare_cipher_methods();
#ifdef IMPLEMENT_DIGEST
prepare_digest_methods();
#endif
return (ENGINE_set_ciphers(e, devcrypto_ciphers)
#ifdef IMPLEMENT_DIGEST
&& ENGINE_set_digests(e, devcrypto_digests)
#endif
/*
* Asymmetric ciphers aren't well supported with /dev/crypto. Among the BSD
* implementations, it seems to only exist in FreeBSD, and regarding the
* parameters in its crypt_kop, the manual crypto(4) has this to say:
*
* The semantics of these arguments are currently undocumented.
*
* Reading through the FreeBSD source code doesn't give much more than
* their CRK_MOD_EXP implementation for ubsec.
*
* It doesn't look much better with cryptodev-linux. They have the crypt_kop
* structure as well as the command (CRK_*) in cryptodev.h, but no support
* seems to be implemented at all for the moment.
*
* At the time of writing, it seems impossible to write proper support for
* FreeBSD's asym features without some very deep knowledge and access to
* specific kernel modules.
*
* /Richard Levitte, 2017-05-11
*/
#if 0
&& ENGINE_set_RSA(e, devcrypto_rsa)
# ifndef OPENSSL_NO_DSA
&& ENGINE_set_DSA(e, devcrypto_dsa)
# endif
# ifndef OPENSSL_NO_DH
&& ENGINE_set_DH(e, devcrypto_dh)
# endif
# ifndef OPENSSL_NO_EC
&& ENGINE_set_EC(e, devcrypto_ec)
# endif
#endif
);
}
#ifdef OPENSSL_NO_DYNAMIC_ENGINE
/*
* In case this engine is built into libcrypto, then it doesn't offer any
* ability to be dynamically loadable.
*/
void engine_load_devcrypto_int(void)
{
ENGINE *e = NULL;
if (!open_devcrypto())
return;
if ((e = ENGINE_new()) == NULL
|| !bind_devcrypto(e)) {
close_devcrypto();
ENGINE_free(e);
return;
}
ERR_set_mark();
ENGINE_add(e);
/*
* If the "add" worked, it gets a structural reference. So either way, we
* release our just-created reference.
*/
ENGINE_free(e); /* Loose our local reference */
/*
* 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();
}
#else
static int bind_helper(ENGINE *e, const char *id)
{
if ((id && (strcmp(id, engine_devcrypto_id) != 0))
|| !open_devcrypto())
return 0;
if (!bind_devcrypto(e)) {
close_devcrypto();
return 0;
}
return 1;
}
IMPLEMENT_DYNAMIC_CHECK_FN()
IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
#endif
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