From 2afebe0bab5e03c9ae1555fd79044940245d7235 Mon Sep 17 00:00:00 2001 From: Eneas U de Queiroz Date: Tue, 6 Nov 2018 10:57:03 -0200 Subject: [PATCH] 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 Reviewed-by: Matt Caswell Reviewed-by: Richard Levitte (Merged from https://github.com/openssl/openssl/pull/7859) --- crypto/engine/build.info | 3 - crypto/init.c | 34 ++--- engines/build.info | 13 ++ .../eng_devcrypto.c => engines/e_devcrypto.c | 134 ++++++++++++------ 4 files changed, 121 insertions(+), 63 deletions(-) rename crypto/engine/eng_devcrypto.c => engines/e_devcrypto.c (95%) 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/init.c b/crypto/init.c index 22d28a9865..ddea63ae0d 100644 --- a/crypto/init.c +++ b/crypto/init.c @@ -353,18 +353,6 @@ DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl) engine_load_openssl_int(); return 1; } -# ifndef OPENSSL_NO_DEVCRYPTOENG -static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT; -DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto) -{ -# ifdef OPENSSL_INIT_DEBUG - fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: " - "engine_load_devcrypto_int()\n"); -# endif - engine_load_devcrypto_int(); - return 1; -} -# endif # ifndef OPENSSL_NO_RDRAND static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT; @@ -389,6 +377,18 @@ DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic) return 1; } # ifndef OPENSSL_NO_STATIC_ENGINE +# ifndef OPENSSL_NO_DEVCRYPTOENG +static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT; +DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto) +{ +# ifdef OPENSSL_INIT_DEBUG + fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: " + "engine_load_devcrypto_int()\n"); +# endif + engine_load_devcrypto_int(); + return 1; +} +# endif # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK) static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT; DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock) @@ -747,11 +747,6 @@ int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings) if ((opts & OPENSSL_INIT_ENGINE_OPENSSL) && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl)) return 0; -# if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_DEVCRYPTOENG) - if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV) - && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto)) - return 0; -# endif # ifndef OPENSSL_NO_RDRAND if ((opts & OPENSSL_INIT_ENGINE_RDRAND) && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand)) @@ -761,6 +756,11 @@ int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings) && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic)) return 0; # ifndef OPENSSL_NO_STATIC_ENGINE +# ifndef OPENSSL_NO_DEVCRYPTOENG + if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV) + && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto)) + return 0; +# endif # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK) if ((opts & OPENSSL_INIT_ENGINE_PADLOCK) && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock)) diff --git a/engines/build.info b/engines/build.info index 27f1cecf26..f94e620a02 100644 --- a/engines/build.info +++ b/engines/build.info @@ -10,6 +10,9 @@ IF[{- !$disabled{"engine"} -}] IF[{- !$disabled{afalgeng} -}] SOURCE[../libcrypto]=e_afalg.c ENDIF + IF[{- !$disabled{"devcryptoeng"} -}] + SOURCE[../libcrypto]=e_devcrypto.c + ENDIF ELSE MODULES{engine}=padlock SOURCE[padlock]=e_padlock.c {- $target{padlock_asm_src} -} @@ -39,6 +42,16 @@ IF[{- !$disabled{"engine"} -}] GENERATE[afalg.ld]=../util/engines.num ENDIF ENDIF + IF[{- !$disabled{"devcryptoeng"} -}] + ENGINES=devcrypto + SOURCE[devcrypto]=e_devcrypto.c + DEPEND[devcrypto]=../libcrypto + INCLUDE[devcrypto]=../include + IF[{- defined $target{shared_defflag} -}] + SHARED_SOURCE[devcrypto]=devcrypto.ld + GENERATE[devcrypto.ld]=../util/engines.num + ENDIF + ENDIF MODULES{noinst,engine}=ossltest dasync SOURCE[dasync]=e_dasync.c diff --git a/crypto/engine/eng_devcrypto.c b/engines/e_devcrypto.c similarity index 95% rename from crypto/engine/eng_devcrypto.c rename to engines/e_devcrypto.c index ec6337de11..87e4c2437c 100644 --- a/crypto/engine/eng_devcrypto.c +++ b/engines/e_devcrypto.c @@ -7,7 +7,7 @@ * https://www.openssl.org/source/license.html */ -#include "e_os.h" +#include "../e_os.h" #include #include #include @@ -23,20 +23,20 @@ #include #include -#include "internal/engine.h" - /* #define ENGINE_DEVCRYPTO_DEBUG */ #ifdef CRYPTO_ALGORITHM_MIN # define CHECK_BSD_STYLE_MACROS #endif +#define engine_devcrypto_id "devcrypto" + /* * 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; +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 */ @@ -66,6 +66,10 @@ struct driver_info_st { char *driver_name; }; +#ifdef OPENSSL_NO_DYNAMIC_ENGINE +void engine_load_devcrypto_int(void); +#endif + /****************************************************************************** * * Ciphers @@ -1138,55 +1142,67 @@ static int devcrypto_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void)) * *****/ -static int devcrypto_unload(ENGINE *e) -{ - destroy_all_cipher_methods(); -#ifdef IMPLEMENT_DIGEST - destroy_all_digest_methods(); -#endif - - close(cfd); - - return 1; -} /* - * This engine is always built into libcrypto, so it doesn't offer any - * ability to be dynamically loadable. + * Opens /dev/crypto */ -void engine_load_devcrypto_int() +static int open_devcrypto(void) { - ENGINE *e = NULL; + if (cfd >= 0) + return 1; if ((cfd = open("/dev/crypto", O_RDWR, 0)) < 0) { #ifndef ENGINE_DEVCRYPTO_DEBUG if (errno != ENOENT) #endif fprintf(stderr, "Could not open /dev/crypto: %s\n", strerror(errno)); - return; + return 0; } - if ((e = ENGINE_new()) == NULL - || !ENGINE_set_destroy_function(e, devcrypto_unload)) { - ENGINE_free(e); - /* - * We know that devcrypto_unload() won't be called when one of the - * above two calls have failed, so we close cfd explicitly here to - * avoid leaking resources. - */ - close(cfd); - return; + return 1; +} + +static int close_devcrypto(void) +{ + if (cfd < 0) + return 1; + cfd = -1; + if (close(cfd) == 0) { + fprintf(stderr, "Error closing /dev/crypto: %s\n", strerror(errno)); + return 0; } + return 1; +} - prepare_cipher_methods(); +static int devcrypto_unload(ENGINE *e) +{ + destroy_all_cipher_methods(); #ifdef IMPLEMENT_DIGEST - prepare_digest_methods(); + destroy_all_digest_methods(); #endif - if (!ENGINE_set_id(e, "devcrypto") + 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) + || !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 @@ -1209,23 +1225,36 @@ void engine_load_devcrypto_int() */ #if 0 # ifndef OPENSSL_NO_RSA - || !ENGINE_set_RSA(e, devcrypto_rsa) + && ENGINE_set_RSA(e, devcrypto_rsa) # endif # ifndef OPENSSL_NO_DSA - || !ENGINE_set_DSA(e, devcrypto_dsa) + && ENGINE_set_DSA(e, devcrypto_dsa) # endif # ifndef OPENSSL_NO_DH - || !ENGINE_set_DH(e, devcrypto_dh) + && ENGINE_set_DH(e, devcrypto_dh) # endif # ifndef OPENSSL_NO_EC - || !ENGINE_set_EC(e, devcrypto_ec) + && ENGINE_set_EC(e, devcrypto_ec) # endif #endif - || !ENGINE_set_ciphers(e, devcrypto_ciphers) -#ifdef IMPLEMENT_DIGEST - || !ENGINE_set_digests(e, devcrypto_digests) -#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; } @@ -1234,3 +1263,22 @@ void engine_load_devcrypto_int() ENGINE_free(e); /* Loose our local reference */ ERR_clear_error(); } + +#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 -- 2.25.1