e_devcrypto: make the /dev/crypto engine dynamic

Engine has been moved from crypto/engine/eng_devcrypto.c to
engines/e_devcrypto.c.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7859)

2 files changed, 0 insertions, 1239 deletions

diff --git a/crypto/engine/build.info b/crypto/engine/build.info
index e00802a3fd..47fe948966 100644
--- a/crypto/engine/build.info
+++ b/crypto/engine/build.info
@@ -6,6 +6,3 @@ SOURCE[../../libcrypto]=\
         tb_cipher.c tb_digest.c tb_pkmeth.c tb_asnmth.c tb_eckey.c \
         eng_openssl.c eng_cnf.c eng_dyn.c \
         eng_rdrand.c
-IF[{- !$disabled{devcryptoeng} -}]
-  SOURCE[../../libcrypto]=eng_devcrypto.c
-ENDIF
diff --git a/crypto/engine/eng_devcrypto.c b/crypto/engine/eng_devcrypto.c
deleted file mode 100644
index ec6337de11..0000000000
--- a/crypto/engine/eng_devcrypto.c
+++ /dev/null
@@ -1,1236 +0,0 @@
-/*
- * Copyright 2017-2018 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
- */
-
-#include "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/engine.h"
-
-/* #define ENGINE_DEVCRYPTO_DEBUG */
-
-#ifdef CRYPTO_ALGORITHM_MIN
-# define CHECK_BSD_STYLE_MACROS
-#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;
-#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_SOFDTRIVERS DEVCRYPTO_REJECT_SOFTWARE
-static int use_softdrivers = DEVCRYPTO_DEFAULT_USE_SOFDTRIVERS;
-
-/*
- * 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 unkown */
-        DEVCRYPTO_ACCELERATED            =  1  /* hardware accelerated */
-    } accelerated;
-
-    char *driver_name;
-};
-
-/******************************************************************************
- *
- * 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 {
-    struct session_op 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_nid(ctx));
-
-    memset(&cipher_ctx->sess, 0, sizeof(cipher_ctx->sess));
-    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;
-    if (ioctl(cfd, CIOCGSESSION, &cipher_ctx->sess) < 0) {
-        SYSerr(SYS_F_IOCTL, errno);
-        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_iv_length(ctx);
-    if (ivlen > 0)
-        switch (cipher_ctx->mode) {
-        case EVP_CIPH_CBC_MODE:
-            assert(inl >= ivlen);
-            if (!EVP_CIPHER_CTX_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) {
-        SYSerr(SYS_F_IOCTL, errno);
-        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_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)
-{
-    EVP_CIPHER_CTX *to_ctx = (EVP_CIPHER_CTX *)p2;
-    struct cipher_ctx *cipher_ctx;
-
-    if (type == EVP_CTRL_COPY) {
-        /* when copying the context, a new session needs to be initialized */
-        cipher_ctx = (struct cipher_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
-        return (cipher_ctx == NULL)
-            || cipher_init(to_ctx, cipher_ctx->sess.key, EVP_CIPHER_CTX_iv(ctx),
-                           (cipher_ctx->op == COP_ENCRYPT));
-    }
-
-    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);
-
-    if (ioctl(cfd, CIOCFSESSION, &cipher_ctx->sess.ses) < 0) {
-        SYSerr(SYS_F_IOCTL, errno);
-        return 0;
-    }
-
-    return 1;
-}
-
-/*
- * 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;
-    struct session_op sess;
-    unsigned long cipher_mode;
-#ifdef 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;
-        if (ioctl(cfd, CIOCGSESSION, &sess) < 0) {
-            cipher_driver_info[i].status = DEVCRYPTO_STATUS_NO_CIOCGSESSION;
-            continue;
-        }
-
-        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_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 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_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 {
-    struct session_op 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 digestlen;
-    int devcryptoid;
-} digest_data[] = {
-#ifndef OPENSSL_NO_MD5
-    { NID_md5, 16, CRYPTO_MD5 },
-#endif
-    { NID_sha1, 20, CRYPTO_SHA1 },
-#ifndef OPENSSL_NO_RMD160
-# if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_RIPEMD160)
-    { NID_ripemd160, 20, CRYPTO_RIPEMD160 },
-# endif
-#endif
-#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_SHA2_224)
-    { NID_sha224, 224 / 8, CRYPTO_SHA2_224 },
-#endif
-#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_SHA2_256)
-    { NID_sha256, 256 / 8, CRYPTO_SHA2_256 },
-#endif
-#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_SHA2_384)
-    { NID_sha384, 384 / 8, CRYPTO_SHA2_384 },
-#endif
-#if !defined(CHECK_BSD_STYLE_MACROS) || defined(CRYPTO_SHA2_512)
-    { NID_sha512, 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_md_data(ctx);
-    const struct digest_data_st *digest_d =
-        get_digest_data(EVP_MD_CTX_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) {
-        SYSerr(SYS_F_IOCTL, errno);
-        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_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;
-    }
-
-    SYSerr(SYS_F_IOCTL, errno);
-    return 0;
-}
-
-static int digest_final(EVP_MD_CTX *ctx, unsigned char *md)
-{
-    struct digest_ctx *digest_ctx =
-        (struct digest_ctx *)EVP_MD_CTX_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_size(ctx));
-    } else if (digest_op(digest_ctx, NULL, 0, md, COP_FLAG_FINAL) < 0) {
-        SYSerr(SYS_F_IOCTL, errno);
-        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_md_data(from);
-    struct digest_ctx *digest_to =
-        (struct digest_ctx *)EVP_MD_CTX_md_data(to);
-    struct cphash_op cphash;
-
-    if (digest_from == NULL || digest_from->init_called != 1)
-        return 1;
-
-    if (!digest_init(to)) {
-        SYSerr(SYS_F_IOCTL, errno);
-        return 0;
-    }
-
-    cphash.src_ses = digest_from->sess.ses;
-    cphash.dst_ses = digest_to->sess.ses;
-    if (ioctl(cfd, CIOCCPHASH, &cphash) < 0) {
-        SYSerr(SYS_F_IOCTL, errno);
-        return 0;
-    }
-    return 1;
-}
-
-static int digest_cleanup(EVP_MD_CTX *ctx)
-{
-    struct digest_ctx *digest_ctx =
-        (struct digest_ctx *)EVP_MD_CTX_md_data(ctx);
-
-    if (digest_ctx == NULL)
-        return 1;
-    if (ioctl(cfd, CIOCFSESSION, &digest_ctx->sess.ses) < 0) {
-        SYSerr(SYS_F_IOCTL, errno);
-        return 0;
-    }
-    return 1;
-}
-
-/*
- * 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;
-    struct session_op 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_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_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_ACCELERA