diff options
Diffstat (limited to 'openssl/crypto/engine/eng_dyn.c')
| -rw-r--r-- | openssl/crypto/engine/eng_dyn.c | 920 |
1 files changed, 470 insertions, 450 deletions
diff --git a/openssl/crypto/engine/eng_dyn.c b/openssl/crypto/engine/eng_dyn.c index 807da7a5e..3169b09ad 100644 --- a/openssl/crypto/engine/eng_dyn.c +++ b/openssl/crypto/engine/eng_dyn.c @@ -1,6 +1,7 @@ /* crypto/engine/eng_dyn.c */ -/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL - * project 2001. +/* + * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project + * 2001. */ /* ==================================================================== * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved. @@ -10,7 +11,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in @@ -56,493 +57,512 @@ * */ - #include "eng_int.h" #include <openssl/dso.h> -/* Shared libraries implementing ENGINEs for use by the "dynamic" ENGINE loader - * should implement the hook-up functions with the following prototypes. */ +/* + * Shared libraries implementing ENGINEs for use by the "dynamic" ENGINE + * loader should implement the hook-up functions with the following + * prototypes. + */ /* Our ENGINE handlers */ static int dynamic_init(ENGINE *e); static int dynamic_finish(ENGINE *e); -static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)); +static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, + void (*f) (void)); /* Predeclare our context type */ typedef struct st_dynamic_data_ctx dynamic_data_ctx; /* The implementation for the important control command */ static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx); -#define DYNAMIC_CMD_SO_PATH ENGINE_CMD_BASE -#define DYNAMIC_CMD_NO_VCHECK (ENGINE_CMD_BASE + 1) -#define DYNAMIC_CMD_ID (ENGINE_CMD_BASE + 2) -#define DYNAMIC_CMD_LIST_ADD (ENGINE_CMD_BASE + 3) -#define DYNAMIC_CMD_DIR_LOAD (ENGINE_CMD_BASE + 4) -#define DYNAMIC_CMD_DIR_ADD (ENGINE_CMD_BASE + 5) -#define DYNAMIC_CMD_LOAD (ENGINE_CMD_BASE + 6) +#define DYNAMIC_CMD_SO_PATH ENGINE_CMD_BASE +#define DYNAMIC_CMD_NO_VCHECK (ENGINE_CMD_BASE + 1) +#define DYNAMIC_CMD_ID (ENGINE_CMD_BASE + 2) +#define DYNAMIC_CMD_LIST_ADD (ENGINE_CMD_BASE + 3) +#define DYNAMIC_CMD_DIR_LOAD (ENGINE_CMD_BASE + 4) +#define DYNAMIC_CMD_DIR_ADD (ENGINE_CMD_BASE + 5) +#define DYNAMIC_CMD_LOAD (ENGINE_CMD_BASE + 6) /* The constants used when creating the ENGINE */ static const char *engine_dynamic_id = "dynamic"; static const char *engine_dynamic_name = "Dynamic engine loading support"; static const ENGINE_CMD_DEFN dynamic_cmd_defns[] = { - {DYNAMIC_CMD_SO_PATH, - "SO_PATH", - "Specifies the path to the new ENGINE shared library", - ENGINE_CMD_FLAG_STRING}, - {DYNAMIC_CMD_NO_VCHECK, - "NO_VCHECK", - "Specifies to continue even if version checking fails (boolean)", - ENGINE_CMD_FLAG_NUMERIC}, - {DYNAMIC_CMD_ID, - "ID", - "Specifies an ENGINE id name for loading", - ENGINE_CMD_FLAG_STRING}, - {DYNAMIC_CMD_LIST_ADD, - "LIST_ADD", - "Whether to add a loaded ENGINE to the internal list (0=no,1=yes,2=mandatory)", - ENGINE_CMD_FLAG_NUMERIC}, - {DYNAMIC_CMD_DIR_LOAD, - "DIR_LOAD", - "Specifies whether to load from 'DIR_ADD' directories (0=no,1=yes,2=mandatory)", - ENGINE_CMD_FLAG_NUMERIC}, - {DYNAMIC_CMD_DIR_ADD, - "DIR_ADD", - "Adds a directory from which ENGINEs can be loaded", - ENGINE_CMD_FLAG_STRING}, - {DYNAMIC_CMD_LOAD, - "LOAD", - "Load up the ENGINE specified by other settings", - ENGINE_CMD_FLAG_NO_INPUT}, - {0, NULL, NULL, 0} - }; -static const ENGINE_CMD_DEFN dynamic_cmd_defns_empty[] = { - {0, NULL, NULL, 0} - }; + {DYNAMIC_CMD_SO_PATH, + "SO_PATH", + "Specifies the path to the new ENGINE shared library", + ENGINE_CMD_FLAG_STRING}, + {DYNAMIC_CMD_NO_VCHECK, + "NO_VCHECK", + "Specifies to continue even if version checking fails (boolean)", + ENGINE_CMD_FLAG_NUMERIC}, + {DYNAMIC_CMD_ID, + "ID", + "Specifies an ENGINE id name for loading", + ENGINE_CMD_FLAG_STRING}, + {DYNAMIC_CMD_LIST_ADD, + "LIST_ADD", + "Whether to add a loaded ENGINE to the internal list (0=no,1=yes,2=mandatory)", + ENGINE_CMD_FLAG_NUMERIC}, + {DYNAMIC_CMD_DIR_LOAD, + "DIR_LOAD", + "Specifies whether to load from 'DIR_ADD' directories (0=no,1=yes,2=mandatory)", + ENGINE_CMD_FLAG_NUMERIC}, + {DYNAMIC_CMD_DIR_ADD, + "DIR_ADD", + "Adds a directory from which ENGINEs can be loaded", + ENGINE_CMD_FLAG_STRING}, + {DYNAMIC_CMD_LOAD, + "LOAD", + "Load up the ENGINE specified by other settings", + ENGINE_CMD_FLAG_NO_INPUT}, + {0, NULL, NULL, 0} +}; -/* Loading code stores state inside the ENGINE structure via the "ex_data" +/* + * Loading code stores state inside the ENGINE structure via the "ex_data" * element. We load all our state into a single structure and use that as a - * single context in the "ex_data" stack. */ -struct st_dynamic_data_ctx - { - /* The DSO object we load that supplies the ENGINE code */ - DSO *dynamic_dso; - /* The function pointer to the version checking shared library function */ - dynamic_v_check_fn v_check; - /* The function pointer to the engine-binding shared library function */ - dynamic_bind_engine bind_engine; - /* The default name/path for loading the shared library */ - const char *DYNAMIC_LIBNAME; - /* Whether to continue loading on a version check failure */ - int no_vcheck; - /* If non-NULL, stipulates the 'id' of the ENGINE to be loaded */ - const char *engine_id; - /* If non-zero, a successfully loaded ENGINE should be added to the internal - * ENGINE list. If 2, the add must succeed or the entire load should fail. */ - int list_add_value; - /* The symbol name for the version checking function */ - const char *DYNAMIC_F1; - /* The symbol name for the "initialise ENGINE structure" function */ - const char *DYNAMIC_F2; - /* Whether to never use 'dirs', use 'dirs' as a fallback, or only use - * 'dirs' for loading. Default is to use 'dirs' as a fallback. */ - int dir_load; - /* A stack of directories from which ENGINEs could be loaded */ - STACK_OF(OPENSSL_STRING) *dirs; - }; + * single context in the "ex_data" stack. + */ +struct st_dynamic_data_ctx { + /* The DSO object we load that supplies the ENGINE code */ + DSO *dynamic_dso; + /* + * The function pointer to the version checking shared library function + */ + dynamic_v_check_fn v_check; + /* + * The function pointer to the engine-binding shared library function + */ + dynamic_bind_engine bind_engine; + /* The default name/path for loading the shared library */ + const char *DYNAMIC_LIBNAME; + /* Whether to continue loading on a version check failure */ + int no_vcheck; + /* If non-NULL, stipulates the 'id' of the ENGINE to be loaded */ + const char *engine_id; + /* + * If non-zero, a successfully loaded ENGINE should be added to the + * internal ENGINE list. If 2, the add must succeed or the entire load + * should fail. + */ + int list_add_value; + /* The symbol name for the version checking function */ + const char *DYNAMIC_F1; + /* The symbol name for the "initialise ENGINE structure" function */ + const char *DYNAMIC_F2; + /* + * Whether to never use 'dirs', use 'dirs' as a fallback, or only use + * 'dirs' for loading. Default is to use 'dirs' as a fallback. + */ + int dir_load; + /* A stack of directories from which ENGINEs could be loaded */ + STACK_OF(OPENSSL_STRING) *dirs; +}; -/* This is the "ex_data" index we obtain and reserve for use with our context - * structure. */ +/* + * This is the "ex_data" index we obtain and reserve for use with our context + * structure. + */ static int dynamic_ex_data_idx = -1; -static void int_free_str(char *s) { OPENSSL_free(s); } -/* Because our ex_data element may or may not get allocated depending on whether - * a "first-use" occurs before the ENGINE is freed, we have a memory leak - * problem to solve. We can't declare a "new" handler for the ex_data as we - * don't want a dynamic_data_ctx in *all* ENGINE structures of all types (this - * is a bug in the design of CRYPTO_EX_DATA). As such, we just declare a "free" - * handler and that will get called if an ENGINE is being destroyed and there - * was an ex_data element corresponding to our context type. */ +static void int_free_str(char *s) +{ + OPENSSL_free(s); +} + +/* + * Because our ex_data element may or may not get allocated depending on + * whether a "first-use" occurs before the ENGINE is freed, we have a memory + * leak problem to solve. We can't declare a "new" handler for the ex_data as + * we don't want a dynamic_data_ctx in *all* ENGINE structures of all types + * (this is a bug in the design of CRYPTO_EX_DATA). As such, we just declare + * a "free" handler and that will get called if an ENGINE is being destroyed + * and there was an ex_data element corresponding to our context type. + */ static void dynamic_data_ctx_free_func(void *parent, void *ptr, - CRYPTO_EX_DATA *ad, int idx, long argl, void *argp) - { - if(ptr) - { - dynamic_data_ctx *ctx = (dynamic_data_ctx *)ptr; - if(ctx->dynamic_dso) - DSO_free(ctx->dynamic_dso); - if(ctx->DYNAMIC_LIBNAME) - OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME); - if(ctx->engine_id) - OPENSSL_free((void*)ctx->engine_id); - if(ctx->dirs) - sk_OPENSSL_STRING_pop_free(ctx->dirs, int_free_str); - OPENSSL_free(ctx); - } - } + CRYPTO_EX_DATA *ad, int idx, long argl, + void *argp) +{ + if (ptr) { + dynamic_data_ctx *ctx = (dynamic_data_ctx *)ptr; + if (ctx->dynamic_dso) + DSO_free(ctx->dynamic_dso); + if (ctx->DYNAMIC_LIBNAME) + OPENSSL_free((void *)ctx->DYNAMIC_LIBNAME); + if (ctx->engine_id) + OPENSSL_free((void *)ctx->engine_id); + if (ctx->dirs) + sk_OPENSSL_STRING_pop_free(ctx->dirs, int_free_str); + OPENSSL_free(ctx); + } +} -/* Construct the per-ENGINE context. We create it blindly and then use a lock to - * check for a race - if so, all but one of the threads "racing" will have +/* + * Construct the per-ENGINE context. We create it blindly and then use a lock + * to check for a race - if so, all but one of the threads "racing" will have * wasted their time. The alternative involves creating everything inside the - * lock which is far worse. */ + * lock which is far worse. + */ static int dynamic_set_data_ctx(ENGINE *e, dynamic_data_ctx **ctx) - { - dynamic_data_ctx *c; - c = OPENSSL_malloc(sizeof(dynamic_data_ctx)); - if(!c) - { - ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE); - return 0; - } - memset(c, 0, sizeof(dynamic_data_ctx)); - c->dynamic_dso = NULL; - c->v_check = NULL; - c->bind_engine = NULL; - c->DYNAMIC_LIBNAME = NULL; - c->no_vcheck = 0; - c->engine_id = NULL; - c->list_add_value = 0; - c->DYNAMIC_F1 = "v_check"; - c->DYNAMIC_F2 = "bind_engine"; - c->dir_load = 1; - c->dirs = sk_OPENSSL_STRING_new_null(); - if(!c->dirs) - { - ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE); - OPENSSL_free(c); - return 0; - } - CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); - if((*ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, - dynamic_ex_data_idx)) == NULL) - { - /* Good, we're the first */ - ENGINE_set_ex_data(e, dynamic_ex_data_idx, c); - *ctx = c; - c = NULL; - } - CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); - /* If we lost the race to set the context, c is non-NULL and *ctx is the - * context of the thread that won. */ - if(c) - OPENSSL_free(c); - return 1; - } +{ + dynamic_data_ctx *c; + c = OPENSSL_malloc(sizeof(dynamic_data_ctx)); + if (!c) { + ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX, ERR_R_MALLOC_FAILURE); + return 0; + } + memset(c, 0, sizeof(dynamic_data_ctx)); + c->dynamic_dso = NULL; + c->v_check = NULL; + c->bind_engine = NULL; + c->DYNAMIC_LIBNAME = NULL; + c->no_vcheck = 0; + c->engine_id = NULL; + c->list_add_value = 0; + c->DYNAMIC_F1 = "v_check"; + c->DYNAMIC_F2 = "bind_engine"; + c->dir_load = 1; + c->dirs = sk_OPENSSL_STRING_new_null(); + if (!c->dirs) { + ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX, ERR_R_MALLOC_FAILURE); + OPENSSL_free(c); + return 0; + } + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + if ((*ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, + dynamic_ex_data_idx)) + == NULL) { + /* Good, we're the first */ + ENGINE_set_ex_data(e, dynamic_ex_data_idx, c); + *ctx = c; + c = NULL; + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + /* + * If we lost the race to set the context, c is non-NULL and *ctx is the + * context of the thread that won. + */ + if (c) + OPENSSL_free(c); + return 1; +} -/* This function retrieves the context structure from an ENGINE's "ex_data", or - * if it doesn't exist yet, sets it up. */ +/* + * This function retrieves the context structure from an ENGINE's "ex_data", + * or if it doesn't exist yet, sets it up. + */ static dynamic_data_ctx *dynamic_get_data_ctx(ENGINE *e) - { - dynamic_data_ctx *ctx; - if(dynamic_ex_data_idx < 0) - { - /* Create and register the ENGINE ex_data, and associate our - * "free" function with it to ensure any allocated contexts get - * freed when an ENGINE goes underground. */ - int new_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, - dynamic_data_ctx_free_func); - if(new_idx == -1) - { - ENGINEerr(ENGINE_F_DYNAMIC_GET_DATA_CTX,ENGINE_R_NO_INDEX); - return NULL; - } - CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); - /* Avoid a race by checking again inside this lock */ - if(dynamic_ex_data_idx < 0) - { - /* Good, someone didn't beat us to it */ - dynamic_ex_data_idx = new_idx; - new_idx = -1; - } - CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); - /* In theory we could "give back" the index here if - * (new_idx>-1), but it's not possible and wouldn't gain us much - * if it were. */ - } - ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, dynamic_ex_data_idx); - /* Check if the context needs to be created */ - if((ctx == NULL) && !dynamic_set_data_ctx(e, &ctx)) - /* "set_data" will set errors if necessary */ - return NULL; - return ctx; - } +{ + dynamic_data_ctx *ctx; + if (dynamic_ex_data_idx < 0) { + /* + * Create and register the ENGINE ex_data, and associate our "free" + * function with it to ensure any allocated contexts get freed when + * an ENGINE goes underground. + */ + int new_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, + dynamic_data_ctx_free_func); + if (new_idx == -1) { + ENGINEerr(ENGINE_F_DYNAMIC_GET_DATA_CTX, ENGINE_R_NO_INDEX); + return NULL; + } + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + /* Avoid a race by checking again inside this lock */ + if (dynamic_ex_data_idx < 0) { + /* Good, someone didn't beat us to it */ + dynamic_ex_data_idx = new_idx; + new_idx = -1; + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + /* + * In theory we could "give back" the index here if (new_idx>-1), but + * it's not possible and wouldn't gain us much if it were. + */ + } + ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, dynamic_ex_data_idx); + /* Check if the context needs to be created */ + if ((ctx == NULL) && !dynamic_set_data_ctx(e, &ctx)) + /* "set_data" will set errors if necessary */ + return NULL; + return ctx; +} static ENGINE *engine_dynamic(void) - { - ENGINE *ret = ENGINE_new(); - if(!ret) - return NULL; - if(!ENGINE_set_id(ret, engine_dynamic_id) || - !ENGINE_set_name(ret, engine_dynamic_name) || - !ENGINE_set_init_function(ret, dynamic_init) || - !ENGINE_set_finish_function(ret, dynamic_finish) || - !ENGINE_set_ctrl_function(ret, dynamic_ctrl) || - !ENGINE_set_flags(ret, ENGINE_FLAGS_BY_ID_COPY) || - !ENGINE_set_cmd_defns(ret, dynamic_cmd_defns)) - { - ENGINE_free(ret); - return NULL; - } - return ret; - } +{ + ENGINE *ret = ENGINE_new(); + if (!ret) + return NULL; + if (!ENGINE_set_id(ret, engine_dynamic_id) || + !ENGINE_set_name(ret, engine_dynamic_name) || + !ENGINE_set_init_function(ret, dynamic_init) || + !ENGINE_set_finish_function(ret, dynamic_finish) || + !ENGINE_set_ctrl_function(ret, dynamic_ctrl) || + !ENGINE_set_flags(ret, ENGINE_FLAGS_BY_ID_COPY) || + !ENGINE_set_cmd_defns(ret, dynamic_cmd_defns)) { + ENGINE_free(ret); + return NULL; + } + return ret; +} void ENGINE_load_dynamic(void) - { - ENGINE *toadd = engine_dynamic(); - if(!toadd) return; - ENGINE_add(toadd); - /* If the "add" worked, it gets a structural reference. So either way, - * we release our just-created reference. */ - ENGINE_free(toadd); - /* If the "add" didn't work, it was probably a conflict because it was - * already added (eg. someone calling ENGINE_load_blah then calling - * ENGINE_load_builtin_engines() perhaps). */ - ERR_clear_error(); - } +{ + ENGINE *toadd = engine_dynamic(); + if (!toadd) + return; + ENGINE_add(toadd); + /* + * If the "add" worked, it gets a structural reference. So either way, we + * release our just-created reference. + */ + ENGINE_free(toadd); + /* + * If the "add" didn't work, it was probably a conflict because it was + * already added (eg. someone calling ENGINE_load_blah then calling + * ENGINE_load_builtin_engines() perhaps). + */ + ERR_clear_error(); +} static int dynamic_init(ENGINE *e) - { - /* We always return failure - the "dyanamic" engine itself can't be used - * for anything. */ - return 0; - } +{ + /* + * We always return failure - the "dyanamic" engine itself can't be used + * for anything. + */ + return 0; +} static int dynamic_finish(ENGINE *e) - { - /* This should never be called on account of "dynamic_init" always - * failing. */ - return 0; - } +{ + /* + * This should never be called on account of "dynamic_init" always + * failing. + */ + return 0; +} + +static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f) (void)) +{ + dynamic_data_ctx *ctx = dynamic_get_data_ctx(e); + int initialised; -static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)) - { - dynamic_data_ctx *ctx = dynamic_get_data_ctx(e); - int initialised; - - if(!ctx) - { - ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_NOT_LOADED); - return 0; - } - initialised = ((ctx->dynamic_dso == NULL) ? 0 : 1); - /* All our control commands require the ENGINE to be uninitialised */ - if(initialised) - { - ENGINEerr(ENGINE_F_DYNAMIC_CTRL, - ENGINE_R_ALREADY_LOADED); - return 0; - } - switch(cmd) - { - case DYNAMIC_CMD_SO_PATH: - /* a NULL 'p' or a string of zero-length is the same thing */ - if(p && (strlen((const char *)p) < 1)) - p = NULL; - if(ctx->DYNAMIC_LIBNAME) - OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME); - if(p) - ctx->DYNAMIC_LIBNAME = BUF_strdup(p); - else - ctx->DYNAMIC_LIBNAME = NULL; - return (ctx->DYNAMIC_LIBNAME ? 1 : 0); - case DYNAMIC_CMD_NO_VCHECK: - ctx->no_vcheck = ((i == 0) ? 0 : 1); - return 1; - case DYNAMIC_CMD_ID: - /* a NULL 'p' or a string of zero-length is the same thing */ - if(p && (strlen((const char *)p) < 1)) - p = NULL; - if(ctx->engine_id) - OPENSSL_free((void*)ctx->engine_id); - if(p) - ctx->engine_id = BUF_strdup(p); - else - ctx->engine_id = NULL; - return (ctx->engine_id ? 1 : 0); - case DYNAMIC_CMD_LIST_ADD: - if((i < 0) || (i > 2)) - { - ENGINEerr(ENGINE_F_DYNAMIC_CTRL, - ENGINE_R_INVALID_ARGUMENT); - return 0; - } - ctx->list_add_value = (int)i; - return 1; - case DYNAMIC_CMD_LOAD: - return dynamic_load(e, ctx); - case DYNAMIC_CMD_DIR_LOAD: - if((i < 0) || (i > 2)) - { - ENGINEerr(ENGINE_F_DYNAMIC_CTRL, - ENGINE_R_INVALID_ARGUMENT); - return 0; - } - ctx->dir_load = (int)i; - return 1; - case DYNAMIC_CMD_DIR_ADD: - /* a NULL 'p' or a string of zero-length is the same thing */ - if(!p || (strlen((const char *)p) < 1)) - { - ENGINEerr(ENGINE_F_DYNAMIC_CTRL, - ENGINE_R_INVALID_ARGUMENT); - return 0; - } - { - char *tmp_str = BUF_strdup(p); - if(!tmp_str) - { - ENGINEerr(ENGINE_F_DYNAMIC_CTRL, - ERR_R_MALLOC_FAILURE); - return 0; - } - sk_OPENSSL_STRING_insert(ctx->dirs, tmp_str, -1); - } - return 1; - default: - break; - } - ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED); - return 0; - } + if (!ctx) { + ENGINEerr(ENGINE_F_DYNAMIC_CTRL, ENGINE_R_NOT_LOADED); + return 0; + } + initialised = ((ctx->dynamic_dso == NULL) ? 0 : 1); + /* All our control commands require the ENGINE to be uninitialised */ + if (initialised) { + ENGINEerr(ENGINE_F_DYNAMIC_CTRL, ENGINE_R_ALREADY_LOADED); + return 0; + } + switch (cmd) { + case DYNAMIC_CMD_SO_PATH: + /* a NULL 'p' or a string of zero-length is the same thing */ + if (p && (strlen((const char *)p) < 1)) + p = NULL; + if (ctx->DYNAMIC_LIBNAME) + OPENSSL_free((void *)ctx->DYNAMIC_LIBNAME); + if (p) + ctx->DYNAMIC_LIBNAME = BUF_strdup(p); + else + ctx->DYNAMIC_LIBNAME = NULL; + return (ctx->DYNAMIC_LIBNAME ? 1 : 0); + case DYNAMIC_CMD_NO_VCHECK: + ctx->no_vcheck = ((i == 0) ? 0 : 1); + return 1; + case DYNAMIC_CMD_ID: + /* a NULL 'p' or a string of zero-length is the same thing */ + if (p && (strlen((const char *)p) < 1)) + p = NULL; + if (ctx->engine_id) + OPENSSL_free((void *)ctx->engine_id); + if (p) + ctx->engine_id = BUF_strdup(p); + else + ctx->engine_id = NULL; + return (ctx->engine_id ? 1 : 0); + case DYNAMIC_CMD_LIST_ADD: + if ((i < 0) || (i > 2)) { + ENGINEerr(ENGINE_F_DYNAMIC_CTRL, ENGINE_R_INVALID_ARGUMENT); + return 0; + } + ctx->list_add_value = (int)i; + return 1; + case DYNAMIC_CMD_LOAD: + return dynamic_load(e, ctx); + case DYNAMIC_CMD_DIR_LOAD: + if ((i < 0) || (i > 2)) { + ENGINEerr(ENGINE_F_DYNAMIC_CTRL, ENGINE_R_INVALID_ARGUMENT); + return 0; + } + ctx->dir_load = (int)i; + return 1; + case DYNAMIC_CMD_DIR_ADD: + /* a NULL 'p' or a string of zero-length is the same thing */ + if (!p || (strlen((const char *)p) < 1)) { + ENGINEerr(ENGINE_F_DYNAMIC_CTRL, ENGINE_R_INVALID_ARGUMENT); + return 0; + } + { + char *tmp_str = BUF_strdup(p); + if (!tmp_str) { + ENGINEerr(ENGINE_F_DYNAMIC_CTRL, ERR_R_MALLOC_FAILURE); + return 0; + } + sk_OPENSSL_STRING_insert(ctx->dirs, tmp_str, -1); + } + return 1; + default: + break; + } + ENGINEerr(ENGINE_F_DYNAMIC_CTRL, ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED); + return 0; +} static int int_load(dynamic_data_ctx *ctx) - { - int num, loop; - /* Unless told not to, try a direct load */ - if((ctx->dir_load != 2) && (DSO_load(ctx->dynamic_dso, - ctx->DYNAMIC_LIBNAME, NULL, 0)) != NULL) - return 1; - /* If we're not allowed to use 'dirs' or we have none, fail */ - if(!ctx->dir_load || (num = sk_OPENSSL_STRING_num(ctx->dirs)) < 1) - return 0; - for(loop = 0; loop < num; loop++) - { - const char *s = sk_OPENSSL_STRING_value(ctx->dirs, loop); - char *merge = DSO_merge(ctx->dynamic_dso, ctx->DYNAMIC_LIBNAME, s); - if(!merge) - return 0; - if(DSO_load(ctx->dynamic_dso, merge, NULL, 0)) - { - /* Found what we're looking for */ - OPENSSL_free(merge); - return 1; - } - OPENSSL_free(merge); - } - return 0; - } +{ + int num, loop; + /* Unless told not to, try a direct load */ + if ((ctx->dir_load != 2) && (DSO_load(ctx->dynamic_dso, + ctx->DYNAMIC_LIBNAME, NULL, + 0)) != NULL) + return 1; + /* If we're not allowed to use 'dirs' or we have none, fail */ + if (!ctx->dir_load || (num = sk_OPENSSL_STRING_num(ctx->dirs)) < 1) + return 0; + for (loop = 0; loop < num; loop++) { + const char *s = sk_OPENSSL_STRING_value(ctx->dirs, loop); + char *merge = DSO_merge(ctx->dynamic_dso, ctx->DYNAMIC_LIBNAME, s); + if (!merge) + return 0; + if (DSO_load(ctx->dynamic_dso, merge, NULL, 0)) { + /* Found what we're looking for */ + OPENSSL_free(merge); + return 1; + } + OPENSSL_free(merge); + } + return 0; +} static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx) - { - ENGINE cpy; - dynamic_fns fns; +{ + ENGINE cpy; + dynamic_fns fns; - if(!ctx->dynamic_dso) - ctx->dynamic_dso = DSO_new(); - if(!ctx->DYNAMIC_LIBNAME) - { - if(!ctx->engine_id) - return 0; - ctx->DYNAMIC_LIBNAME = - DSO_convert_filename(ctx->dynamic_dso, ctx->engine_id); - } - if(!int_load(ctx)) - { - ENGINEerr(ENGINE_F_DYNAMIC_LOAD, - ENGINE_R_DSO_NOT_FOUND); - DSO_free(ctx->dynamic_dso); - ctx->dynamic_dso = NULL; - return 0; - } - /* We have to find a bind function otherwise it'll always end badly */ - if(!(ctx->bind_engine = (dynamic_bind_engine)DSO_bind_func( - ctx->dynamic_dso, ctx->DYNAMIC_F2))) - { - ctx->bind_engine = NULL; - DSO_free(ctx->dynamic_dso); - ctx->dynamic_dso = NULL; - ENGINEerr(ENGINE_F_DYNAMIC_LOAD, - ENGINE_R_DSO_FAILURE); - return 0; - } - /* Do we perform version checking? */ - if(!ctx->no_vcheck) - { - unsigned long vcheck_res = 0; - /* Now we try to find a version checking function and decide how - * to cope with failure if/when it fails. */ - ctx->v_check = (dynamic_v_check_fn)DSO_bind_func( - ctx->dynamic_dso, ctx->DYNAMIC_F1); - if(ctx->v_check) - vcheck_res = ctx->v_check(OSSL_DYNAMIC_VERSION); - /* We fail if the version checker veto'd the load *or* if it is - * deferring to us (by returning its version) and we think it is - * too old. */ - if(vcheck_res < OSSL_DYNAMIC_OLDEST) - { - /* Fail */ - ctx->bind_engine = NULL; - ctx->v_check = NULL; - DSO_free(ctx->dynamic_dso); - ctx->dynamic_dso = NULL; - ENGINEerr(ENGINE_F_DYNAMIC_LOAD, - ENGINE_R_VERSION_INCOMPATIBILITY); - return 0; - } - } - /* First binary copy the ENGINE structure so that we can roll back if - * the hand-over fails */ - memcpy(&cpy, e, sizeof(ENGINE)); - /* Provide the ERR, "ex_data", memory, and locking callbacks so the - * loaded library uses our state rather than its own. FIXME: As noted in - * engine.h, much of this would be simplified if each area of code - * provided its own "summary" structure of all related callbacks. It - * would also increase opaqueness. */ - fns.static_state = ENGINE_get_static_state(); - fns.err_fns = ERR_get_implementation(); - fns.ex_data_fns = CRYPTO_get_ex_data_implementation(); - CRYPTO_get_mem_functions(&fns.mem_fns.malloc_cb, - &fns.mem_fns.realloc_cb, - &fns.mem_fns.free_cb); - fns.lock_fns.lock_locking_cb = CRYPTO_get_locking_callback(); - fns.lock_fns.lock_add_lock_cb = CRYPTO_get_add_lock_callback(); - fns.lock_fns.dynlock_create_cb = CRYPTO_get_dynlock_create_callback(); - fns.lock_fns.dynlock_lock_cb = CRYPTO_get_dynlock_lock_callback(); - fns.lock_fns.dynlock_destroy_cb = CRYPTO_get_dynlock_destroy_callback(); - /* Now that we've loaded the dynamic engine, make sure no "dynamic" - * ENGINE elements will show through. */ - engine_set_all_null(e); + if (!ctx->dynamic_dso) + ctx->dynamic_dso = DSO_new(); + if (!ctx->DYNAMIC_LIBNAME) { + if (!ctx->engine_id) + return 0; + ctx->DYNAMIC_LIBNAME = + DSO_convert_filename(ctx->dynamic_dso, ctx->engine_id); + } + if (!int_load(ctx)) { + ENGINEerr(ENGINE_F_DYNAMIC_LOAD, ENGINE_R_DSO_NOT_FOUND); + DSO_free(ctx->dynamic_dso); + ctx->dynamic_dso = NULL; + return 0; + } + /* We have to find a bind function otherwise it'll always end badly */ + if (! + (ctx->bind_engine = + (dynamic_bind_engine) DSO_bind_func(ctx->dynamic_dso, + ctx->DYNAMIC_F2))) { + ctx->bind_engine = NULL; + DSO_free(ctx->dynamic_dso); + ctx->dynamic_dso = NULL; + ENGINEerr(ENGINE_F_DYNAMIC_LOAD, ENGINE_R_DSO_FAILURE); + return 0; + } + /* Do we perform version checking? */ + if (!ctx->no_vcheck) { + unsigned long vcheck_res = 0; + /* + * Now we try to find a version checking function and decide how to + * cope with failure if/when it fails. + */ + ctx->v_check = + (dynamic_v_check_fn) DSO_bind_func(ctx->dynamic_dso, + ctx->DYNAMIC_F1); + if (ctx->v_check) + vcheck_res = ctx->v_check(OSSL_DYNAMIC_VERSION); + /* + * We fail if the version checker veto'd the load *or* if it is + * deferring to us (by returning its version) and we think it is too + * old. + */ + if (vcheck_res < OSSL_DYNAMIC_OLDEST) { + /* Fail */ + ctx->bind_engine = NULL; + ctx->v_check = NULL; + DSO_free(ctx->dynamic_dso); + ctx->dynamic_dso = NULL; + ENGINEerr(ENGINE_F_DYNAMIC_LOAD, + ENGINE_R_VERSION_INCOMPATIBILITY); + return 0; + } + } + /* + * First binary copy the ENGINE structure so that we can roll back if the + * hand-over fails + */ + memcpy(&cpy, e, sizeof(ENGINE)); + /* + * Provide the ERR, "ex_data", memory, and locking callbacks so the + * loaded library uses our state rather than its own. FIXME: As noted in + * engine.h, much of this would be simplified if each area of code + * provided its own "summary" structure of all related callbacks. It + * would also increase opaqueness. + */ + fns.static_state = ENGINE_get_static_state(); + fns.err_fns = ERR_get_implementation(); + fns.ex_data_fns = CRYPTO_get_ex_data_implementation(); + CRYPTO_get_mem_functions(&fns.mem_fns.malloc_cb, + &fns.mem_fns.realloc_cb, &fns.mem_fns.free_cb); + fns.lock_fns.lock_locking_cb = CRYPTO_get_locking_callback(); + fns.lock_fns.lock_add_lock_cb = CRYPTO_get_add_lock_callback(); + fns.lock_fns.dynlock_create_cb = CRYPTO_get_dynlock_create_callback(); + fns.lock_fns.dynlock_lock_cb = CRYPTO_get_dynlock_lock_callback(); + fns.lock_fns.dynlock_destroy_cb = CRYPTO_get_dynlock_destroy_callback(); + /* + * Now that we've loaded the dynamic engine, make sure no "dynamic" + * ENGINE elements will show through. + */ + engine_set_all_null(e); - /* Try to bind the ENGINE onto our own ENGINE structure */ - if(!ctx->bind_engine(e, ctx->engine_id, &fns)) - { - ctx->bind_engine = NULL; - ctx->v_check = NULL; - DSO_free(ctx->dynamic_dso); - ctx->dynamic_dso = NULL; - ENGINEerr(ENGINE_F_DYNAMIC_LOAD,ENGINE_R_INIT_FAILED); - /* Copy the original ENGINE structure back */ - memcpy(e, &cpy, sizeof(ENGINE)); - return 0; - } - /* Do we try to add this ENGINE to the internal list too? */ - if(ctx->list_add_value > 0) - { - if(!ENGINE_add(e)) - { - /* Do we tolerate this or fail? */ - if(ctx->list_add_value > 1) - { - /* Fail - NB: By this time, it's too late to - * rollback, and trying to do so allows the - * bind_engine() code to have created leaks. We - * just have to fail where we are, after the - * ENGINE has changed. */ - ENGINEerr(ENGINE_F_DYNAMIC_LOAD, - ENGINE_R_CONFLICTING_ENGINE_ID); - return 0; - } - /* Tolerate */ - ERR_clear_error(); - } - } - return 1; - } + /* Try to bind the ENGINE onto our own ENGINE structure */ + if (!ctx->bind_engine(e, ctx->engine_id, &fns)) { + ctx->bind_engine = NULL; + ctx->v_check = NULL; + DSO_free(ctx->dynamic_dso); + ctx->dynamic_dso = NULL; + ENGINEerr(ENGINE_F_DYNAMIC_LOAD, ENGINE_R_INIT_FAILED); + /* Copy the original ENGINE structure back */ + memcpy(e, &cpy, sizeof(ENGINE)); + return 0; + } + /* Do we try to add this ENGINE to the internal list too? */ + if (ctx->list_add_value > 0) { + if (!ENGINE_add(e)) { + /* Do we tolerate this or fail? */ + if (ctx->list_add_value > 1) { + /* + * Fail - NB: By this time, it's too late to rollback, and + * trying to do so allows the bind_engine() code to have + * created leaks. We just have to fail where we are, after + * the ENGINE has changed. + */ + ENGINEerr(ENGINE_F_DYNAMIC_LOAD, + ENGINE_R_CONFLICTING_ENGINE_ID); + return 0; + } + /* Tolerate */ + ERR_clear_error(); + } + } + return 1; +} |