Upgrade openssl from 1.1.0e to 1.1.1b, with source code. 4.0.78

trunk/3rdparty/openssl-1.1-fit/crypto/ex_data.c

@@ -0,0 +1,399 @@
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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 "internal/cryptlib_int.h"
+#include "internal/thread_once.h"
+
+/*
+ * Each structure type (sometimes called a class), that supports
+ * exdata has a stack of callbacks for each instance.
+ */
+struct ex_callback_st {
+    long argl;                  /* Arbitrary long */
+    void *argp;                 /* Arbitrary void * */
+    CRYPTO_EX_new *new_func;
+    CRYPTO_EX_free *free_func;
+    CRYPTO_EX_dup *dup_func;
+};
+
+/*
+ * The state for each class.  This could just be a typedef, but
+ * a structure allows future changes.
+ */
+typedef struct ex_callbacks_st {
+    STACK_OF(EX_CALLBACK) *meth;
+} EX_CALLBACKS;
+
+static EX_CALLBACKS ex_data[CRYPTO_EX_INDEX__COUNT];
+
+static CRYPTO_RWLOCK *ex_data_lock = NULL;
+static CRYPTO_ONCE ex_data_init = CRYPTO_ONCE_STATIC_INIT;
+
+DEFINE_RUN_ONCE_STATIC(do_ex_data_init)
+{
+    if (!OPENSSL_init_crypto(0, NULL))
+        return 0;
+    ex_data_lock = CRYPTO_THREAD_lock_new();
+    return ex_data_lock != NULL;
+}
+
+/*
+ * Return the EX_CALLBACKS from the |ex_data| array that corresponds to
+ * a given class.  On success, *holds the lock.*
+ */
+static EX_CALLBACKS *get_and_lock(int class_index)
+{
+    EX_CALLBACKS *ip;
+
+    if (class_index < 0 || class_index >= CRYPTO_EX_INDEX__COUNT) {
+        CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_PASSED_INVALID_ARGUMENT);
+        return NULL;
+    }
+
+    if (!RUN_ONCE(&ex_data_init, do_ex_data_init)) {
+        CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_MALLOC_FAILURE);
+        return NULL;
+    }
+
+    if (ex_data_lock == NULL) {
+        /*
+         * This can happen in normal operation when using CRYPTO_mem_leaks().
+         * The CRYPTO_mem_leaks() function calls OPENSSL_cleanup() which cleans
+         * up the locks. Subsequently the BIO that CRYPTO_mem_leaks() uses gets
+         * freed, which also attempts to free the ex_data. However
+         * CRYPTO_mem_leaks() ensures that the ex_data is freed early (i.e.
+         * before OPENSSL_cleanup() is called), so if we get here we can safely
+         * ignore this operation. We just treat it as an error.
+         */
+         return NULL;
+    }
+
+    ip = &ex_data[class_index];
+    CRYPTO_THREAD_write_lock(ex_data_lock);
+    return ip;
+}
+
+static void cleanup_cb(EX_CALLBACK *funcs)
+{
+    OPENSSL_free(funcs);
+}
+
+/*
+ * Release all "ex_data" state to prevent memory leaks. This can't be made
+ * thread-safe without overhauling a lot of stuff, and shouldn't really be
+ * called under potential race-conditions anyway (it's for program shutdown
+ * after all).
+ */
+void crypto_cleanup_all_ex_data_int(void)
+{
+    int i;
+
+    for (i = 0; i < CRYPTO_EX_INDEX__COUNT; ++i) {
+        EX_CALLBACKS *ip = &ex_data[i];
+
+        sk_EX_CALLBACK_pop_free(ip->meth, cleanup_cb);
+        ip->meth = NULL;
+    }
+
+    CRYPTO_THREAD_lock_free(ex_data_lock);
+    ex_data_lock = NULL;
+}
+
+
+/*
+ * Unregister a new index by replacing the callbacks with no-ops.
+ * Any in-use instances are leaked.
+ */
+static void dummy_new(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
+                     long argl, void *argp)
+{
+}
+
+static void dummy_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
+                       long argl, void *argp)
+{
+}
+
+static int dummy_dup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
+                     void *from_d, int idx,
+                     long argl, void *argp)
+{
+    return 1;
+}
+
+int CRYPTO_free_ex_index(int class_index, int idx)
+{
+    EX_CALLBACKS *ip = get_and_lock(class_index);
+    EX_CALLBACK *a;
+    int toret = 0;
+
+    if (ip == NULL)
+        return 0;
+    if (idx < 0 || idx >= sk_EX_CALLBACK_num(ip->meth))
+        goto err;
+    a = sk_EX_CALLBACK_value(ip->meth, idx);
+    if (a == NULL)
+        goto err;
+    a->new_func = dummy_new;
+    a->dup_func = dummy_dup;
+    a->free_func = dummy_free;
+    toret = 1;
+err:
+    CRYPTO_THREAD_unlock(ex_data_lock);
+    return toret;
+}
+
+/*
+ * Register a new index.
+ */
+int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
+                            CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
+                            CRYPTO_EX_free *free_func)
+{
+    int toret = -1;
+    EX_CALLBACK *a;
+    EX_CALLBACKS *ip = get_and_lock(class_index);
+
+    if (ip == NULL)
+        return -1;
+
+    if (ip->meth == NULL) {
+        ip->meth = sk_EX_CALLBACK_new_null();
+        /* We push an initial value on the stack because the SSL
+         * "app_data" routines use ex_data index zero.  See RT 3710. */
+        if (ip->meth == NULL
+            || !sk_EX_CALLBACK_push(ip->meth, NULL)) {
+            CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
+            goto err;
+        }
+    }
+
+    a = (EX_CALLBACK *)OPENSSL_malloc(sizeof(*a));
+    if (a == NULL) {
+        CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+    a->argl = argl;
+    a->argp = argp;
+    a->new_func = new_func;
+    a->dup_func = dup_func;
+    a->free_func = free_func;
+
+    if (!sk_EX_CALLBACK_push(ip->meth, NULL)) {
+        CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
+        OPENSSL_free(a);
+        goto err;
+    }
+    toret = sk_EX_CALLBACK_num(ip->meth) - 1;
+    (void)sk_EX_CALLBACK_set(ip->meth, toret, a);
+
+ err:
+    CRYPTO_THREAD_unlock(ex_data_lock);
+    return toret;
+}
+
+/*
+ * Initialise a new CRYPTO_EX_DATA for use in a particular class - including
+ * calling new() callbacks for each index in the class used by this variable
+ * Thread-safe by copying a class's array of "EX_CALLBACK" entries
+ * in the lock, then using them outside the lock. Note this only applies
+ * to the global "ex_data" state (ie. class definitions), not 'ad' itself.
+ */
+int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
+{
+    int mx, i;
+    void *ptr;
+    EX_CALLBACK **storage = NULL;
+    EX_CALLBACK *stack[10];
+    EX_CALLBACKS *ip = get_and_lock(class_index);
+
+    if (ip == NULL)
+        return 0;
+
+    ad->sk = NULL;
+
+    mx = sk_EX_CALLBACK_num(ip->meth);
+    if (mx > 0) {
+        if (mx < (int)OSSL_NELEM(stack))
+            storage = stack;
+        else
+            storage = OPENSSL_malloc(sizeof(*storage) * mx);
+        if (storage != NULL)
+            for (i = 0; i < mx; i++)
+                storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
+    }
+    CRYPTO_THREAD_unlock(ex_data_lock);
+
+    if (mx > 0 && storage == NULL) {
+        CRYPTOerr(CRYPTO_F_CRYPTO_NEW_EX_DATA, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+    for (i = 0; i < mx; i++) {
+        if (storage[i] && storage[i]->new_func) {
+            ptr = CRYPTO_get_ex_data(ad, i);
+            storage[i]->new_func(obj, ptr, ad, i,
+                                 storage[i]->argl, storage[i]->argp);
+        }
+    }
+    if (storage != stack)
+        OPENSSL_free(storage);
+    return 1;
+}
+
+/*
+ * Duplicate a CRYPTO_EX_DATA variable - including calling dup() callbacks
+ * for each index in the class used by this variable
+ */
+int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
+                       const CRYPTO_EX_DATA *from)
+{
+    int mx, j, i;
+    void *ptr;
+    EX_CALLBACK *stack[10];
+    EX_CALLBACK **storage = NULL;
+    EX_CALLBACKS *ip;
+    int toret = 0;
+
+    if (from->sk == NULL)
+        /* Nothing to copy over */
+        return 1;
+    if ((ip = get_and_lock(class_index)) == NULL)
+        return 0;
+
+    mx = sk_EX_CALLBACK_num(ip->meth);
+    j = sk_void_num(from->sk);
+    if (j < mx)
+        mx = j;
+    if (mx > 0) {
+        if (mx < (int)OSSL_NELEM(stack))
+            storage = stack;
+        else
+            storage = OPENSSL_malloc(sizeof(*storage) * mx);
+        if (storage != NULL)
+            for (i = 0; i < mx; i++)
+                storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
+    }
+    CRYPTO_THREAD_unlock(ex_data_lock);
+
+    if (mx == 0)
+        return 1;
+    if (storage == NULL) {
+        CRYPTOerr(CRYPTO_F_CRYPTO_DUP_EX_DATA, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+    /*
+     * Make sure the ex_data stack is at least |mx| elements long to avoid
+     * issues in the for loop that follows; so go get the |mx|'th element
+     * (if it does not exist CRYPTO_get_ex_data() returns NULL), and assign
+     * to itself. This is normally a no-op; but ensures the stack is the
+     * proper size
+     */
+    if (!CRYPTO_set_ex_data(to, mx - 1, CRYPTO_get_ex_data(to, mx - 1)))
+        goto err;
+
+    for (i = 0; i < mx; i++) {
+        ptr = CRYPTO_get_ex_data(from, i);
+        if (storage[i] && storage[i]->dup_func)
+            if (!storage[i]->dup_func(to, from, &ptr, i,
+                                      storage[i]->argl, storage[i]->argp))
+                goto err;
+        CRYPTO_set_ex_data(to, i, ptr);
+    }
+    toret = 1;
+ err:
+    if (storage != stack)
+        OPENSSL_free(storage);
+    return toret;
+}
+
+
+/*
+ * Cleanup a CRYPTO_EX_DATA variable - including calling free() callbacks for
+ * each index in the class used by this variable
+ */
+void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
+{
+    int mx, i;
+    EX_CALLBACKS *ip;
+    void *ptr;
+    EX_CALLBACK *f;
+    EX_CALLBACK *stack[10];
+    EX_CALLBACK **storage = NULL;
+
+    if ((ip = get_and_lock(class_index)) == NULL)
+        goto err;
+
+    mx = sk_EX_CALLBACK_num(ip->meth);
+    if (mx > 0) {
+        if (mx < (int)OSSL_NELEM(stack))
+            storage = stack;
+        else
+            storage = OPENSSL_malloc(sizeof(*storage) * mx);
+        if (storage != NULL)
+            for (i = 0; i < mx; i++)
+                storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
+    }
+    CRYPTO_THREAD_unlock(ex_data_lock);
+
+    for (i = 0; i < mx; i++) {
+        if (storage != NULL)
+            f = storage[i];
+        else {
+            CRYPTO_THREAD_write_lock(ex_data_lock);
+            f = sk_EX_CALLBACK_value(ip->meth, i);
+            CRYPTO_THREAD_unlock(ex_data_lock);
+        }
+        if (f != NULL && f->free_func != NULL) {
+            ptr = CRYPTO_get_ex_data(ad, i);
+            f->free_func(obj, ptr, ad, i, f->argl, f->argp);
+        }
+    }
+
+    if (storage != stack)
+        OPENSSL_free(storage);
+ err:
+    sk_void_free(ad->sk);
+    ad->sk = NULL;
+}
+
+/*
+ * For a given CRYPTO_EX_DATA variable, set the value corresponding to a
+ * particular index in the class used by this variable
+ */
+int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val)
+{
+    int i;
+
+    if (ad->sk == NULL) {
+        if ((ad->sk = sk_void_new_null()) == NULL) {
+            CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE);
+            return 0;
+        }
+    }
+
+    for (i = sk_void_num(ad->sk); i <= idx; ++i) {
+        if (!sk_void_push(ad->sk, NULL)) {
+            CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE);
+            return 0;
+        }
+    }
+    sk_void_set(ad->sk, idx, val);
+    return 1;
+}
+
+/*
+ * For a given CRYPTO_EX_DATA_ variable, get the value corresponding to a
+ * particular index in the class used by this variable
+ */
+void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
+{
+    if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
+        return NULL;
+    return sk_void_value(ad->sk, idx);
+}