diff options
author | Eneas U de Queiroz <cote2004-github@yahoo.com> | 2018-11-06 10:57:03 -0200 |
---|---|---|
committer | Richard Levitte <levitte@openssl.org> | 2019-02-12 20:06:00 +0100 |
commit | 2afebe0bab5e03c9ae1555fd79044940245d7235 (patch) | |
tree | 0777b1f930e7d334459bcba7392e5b9bd7b7e9d8 /crypto/engine | |
parent | 9a18aae5f21efc59da8b697ad67d5d37b95ab322 (diff) |
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)
Diffstat (limited to 'crypto/engine')
-rw-r--r-- | crypto/engine/build.info | 3 | ||||
-rw-r--r-- | crypto/engine/eng_devcrypto.c | 1236 |
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++) { - |