| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * 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 the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #ifndef OPENSSL_HEADER_STACK_H |
| #define OPENSSL_HEADER_STACK_H |
| |
| #include <openssl/base.h> |
| |
| #include <openssl/type_check.h> |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif |
| |
| |
| /* A stack, in OpenSSL, is an array of pointers. They are the most commonly |
| * used collection object. |
| * |
| * This file defines macros for type safe use of the stack functions. A stack |
| * of a specific type of object has type |STACK_OF(type)|. This can be defined |
| * (once) with |DEFINE_STACK_OF(type)| and declared where needed with |
| * |DECLARE_STACK_OF(type)|. For example: |
| * |
| * struct foo { |
| * int bar; |
| * }; |
| * |
| * DEFINE_STACK_OF(struct foo); |
| * |
| * Although note that the stack will contain /pointers/ to |foo|. |
| * |
| * A macro will be defined for each of the sk_* functions below. For |
| * STACK_OF(foo), the macros would be sk_foo_new, sk_foo_pop etc. */ |
| |
| |
| /* stack_cmp_func is a comparison function that returns a value < 0, 0 or > 0 |
| * if |*a| is less than, equal to or greater than |*b|, respectively. Note the |
| * extra indirection - the function is given a pointer to a pointer to the |
| * element. This differs from the usual qsort/bsearch comparison function. */ |
| typedef int (*stack_cmp_func)(const void **a, const void **b); |
| |
| /* stack_st contains an array of pointers. It is not designed to be used |
| * directly, rather the wrapper macros should be used. */ |
| typedef struct stack_st { |
| /* num contains the number of valid pointers in |data|. */ |
| size_t num; |
| void **data; |
| /* sorted is non-zero if the values pointed to by |data| are in ascending |
| * order, based on |comp|. */ |
| size_t sorted; |
| /* num_alloc contains the number of pointers allocated in the buffer pointed |
| * to by |data|, which may be larger than |num|. */ |
| size_t num_alloc; |
| /* comp is an optional comparison function. */ |
| stack_cmp_func comp; |
| } _STACK; |
| |
| |
| #define STACK_OF(type) struct stack_st_##type |
| |
| #define DEFINE_STACK_OF(type) \ |
| STACK_OF(type) {\ |
| _STACK stack; \ |
| } |
| |
| #define DECLARE_STACK_OF(type) STACK_OF(type); |
| |
| /* The make_macros.sh script in this directory parses the following lines and |
| * generates the stack_macros.h file that contains macros for the following |
| * types of stacks: |
| * |
| * STACK_OF:ACCESS_DESCRIPTION |
| * STACK_OF:ASN1_ADB_TABLE |
| * STACK_OF:ASN1_GENERALSTRING |
| * STACK_OF:ASN1_INTEGER |
| * STACK_OF:ASN1_OBJECT |
| * STACK_OF:ASN1_STRING_TABLE |
| * STACK_OF:ASN1_TYPE |
| * STACK_OF:ASN1_VALUE |
| * STACK_OF:BIO |
| * STACK_OF:BY_DIR_ENTRY |
| * STACK_OF:BY_DIR_HASH |
| * STACK_OF:CONF_VALUE |
| * STACK_OF:CRYPTO_EX_DATA_FUNCS |
| * STACK_OF:DIST_POINT |
| * STACK_OF:GENERAL_NAME |
| * STACK_OF:GENERAL_NAMES |
| * STACK_OF:GENERAL_SUBTREE |
| * STACK_OF:MIME_HEADER |
| * STACK_OF:PKCS7_SIGNER_INFO |
| * STACK_OF:PKCS7_RECIP_INFO |
| * STACK_OF:POLICYINFO |
| * STACK_OF:POLICYQUALINFO |
| * STACK_OF:POLICY_MAPPING |
| * STACK_OF:SSL_COMP |
| * STACK_OF:STACK_OF_X509_NAME_ENTRY |
| * STACK_OF:SXNETID |
| * STACK_OF:X509 |
| * STACK_OF:X509V3_EXT_METHOD |
| * STACK_OF:X509_ALGOR |
| * STACK_OF:X509_ATTRIBUTE |
| * STACK_OF:X509_CRL |
| * STACK_OF:X509_EXTENSION |
| * STACK_OF:X509_INFO |
| * STACK_OF:X509_LOOKUP |
| * STACK_OF:X509_NAME |
| * STACK_OF:X509_NAME_ENTRY |
| * STACK_OF:X509_OBJECT |
| * STACK_OF:X509_POLICY_DATA |
| * STACK_OF:X509_POLICY_NODE |
| * STACK_OF:X509_PURPOSE |
| * STACK_OF:X509_REVOKED |
| * STACK_OF:X509_TRUST |
| * STACK_OF:X509_VERIFY_PARAM |
| * STACK_OF:void |
| * |
| * Some stacks contain only const structures, so the stack should return const |
| * pointers to retain type-checking. |
| * |
| * CONST_STACK_OF:SRTP_PROTECTION_PROFILE |
| * CONST_STACK_OF:SSL_CIPHER */ |
| |
| |
| /* Some stacks are special because, although we would like STACK_OF(char *), |
| * that would actually be a stack of pointers to char*, but we just want to |
| * point to the string directly. In this case we call them "special" and use |
| * |DEFINE_SPECIAL_STACK_OF(type)| */ |
| #define DEFINE_SPECIAL_STACK_OF(type, inner) \ |
| STACK_OF(type) { _STACK special_stack; }; \ |
| OPENSSL_COMPILE_ASSERT(sizeof(type) == sizeof(void *), \ |
| special_stack_of_non_pointer_##type); |
| |
| typedef char *OPENSSL_STRING; |
| |
| DEFINE_SPECIAL_STACK_OF(OPENSSL_STRING, char) |
| DEFINE_SPECIAL_STACK_OF(OPENSSL_BLOCK, uint8_t) |
| |
| /* The make_macros.sh script in this directory parses the following lines and |
| * generates the stack_macros.h file that contains macros for the following |
| * types of stacks: |
| * |
| * SPECIAL_STACK_OF:OPENSSL_STRING |
| * SPECIAL_STACK_OF:OPENSSL_BLOCK */ |
| |
| #define IN_STACK_H |
| #include <openssl/stack_macros.h> |
| #undef IN_STACK_H |
| |
| |
| /* These are the raw stack functions, you shouldn't be using them. Rather you |
| * should be using the type stack macros implemented above. */ |
| |
| /* sk_new creates a new, empty stack with the given comparison function, which |
| * may be zero. It returns the new stack or NULL on allocation failure. */ |
| OPENSSL_EXPORT _STACK *sk_new(stack_cmp_func comp); |
| |
| /* sk_new_null creates a new, empty stack. It returns the new stack or NULL on |
| * allocation failure. */ |
| OPENSSL_EXPORT _STACK *sk_new_null(void); |
| |
| /* sk_num returns the number of elements in |s|. */ |
| OPENSSL_EXPORT size_t sk_num(const _STACK *sk); |
| |
| /* sk_zero resets |sk| to the empty state but does nothing to free the |
| * individual elements themselves. */ |
| OPENSSL_EXPORT void sk_zero(_STACK *sk); |
| |
| /* sk_value returns the |i|th pointer in |sk|, or NULL if |i| is out of |
| * range. */ |
| OPENSSL_EXPORT void *sk_value(const _STACK *sk, size_t i); |
| |
| /* sk_set sets the |i|th pointer in |sk| to |p| and returns |p|. If |i| is out |
| * of range, it returns NULL. */ |
| OPENSSL_EXPORT void *sk_set(_STACK *sk, size_t i, void *p); |
| |
| /* sk_free frees the given stack and array of pointers, but does nothing to |
| * free the individual elements. Also see |sk_pop_free|. */ |
| OPENSSL_EXPORT void sk_free(_STACK *sk); |
| |
| /* sk_pop_free calls |free_func| on each element in the stack and then frees |
| * the stack itself. */ |
| OPENSSL_EXPORT void sk_pop_free(_STACK *sk, void (*free_func)(void *)); |
| |
| /* sk_insert inserts |p| into the stack at index |where|, moving existing |
| * elements if needed. It returns the length of the new stack, or zero on |
| * error. */ |
| OPENSSL_EXPORT size_t sk_insert(_STACK *sk, void *p, size_t where); |
| |
| /* sk_delete removes the pointer at index |where|, moving other elements down |
| * if needed. It returns the removed pointer, or NULL if |where| is out of |
| * range. */ |
| OPENSSL_EXPORT void *sk_delete(_STACK *sk, size_t where); |
| |
| /* sk_delete_ptr removes, at most, one instance of |p| from the stack based on |
| * pointer equality. If an instance of |p| is found then |p| is returned, |
| * otherwise it returns NULL. */ |
| OPENSSL_EXPORT void *sk_delete_ptr(_STACK *sk, void *p); |
| |
| /* sk_find returns the first value in the stack equal to |p|. If a comparison |
| * function has been set on the stack, then equality is defined by it and the |
| * stack will be sorted if need be so that a binary search can be used. |
| * Otherwise pointer equality is used. If a matching element is found, its |
| * index is written to |*out_index| (if |out_index| is not NULL) and one is |
| * returned. Otherwise zero is returned. */ |
| OPENSSL_EXPORT int sk_find(_STACK *sk, size_t *out_index, void *p); |
| |
| /* sk_shift removes and returns the first element in the stack, or returns NULL |
| * if the stack is empty. */ |
| OPENSSL_EXPORT void *sk_shift(_STACK *sk); |
| |
| /* sk_push appends |p| to the stack and returns the length of the new stack, or |
| * 0 on allocation failure. */ |
| OPENSSL_EXPORT size_t sk_push(_STACK *sk, void *p); |
| |
| /* sk_pop returns and removes the last element on the stack, or NULL if the |
| * stack is empty. */ |
| OPENSSL_EXPORT void *sk_pop(_STACK *sk); |
| |
| /* sk_dup performs a shallow copy of a stack and returns the new stack, or NULL |
| * on error. */ |
| OPENSSL_EXPORT _STACK *sk_dup(const _STACK *sk); |
| |
| /* sk_sort sorts the elements of |sk| into ascending order based on the |
| * comparison function. The stack maintains a |sorted| flag and sorting an |
| * already sorted stack is a no-op. */ |
| OPENSSL_EXPORT void sk_sort(_STACK *sk); |
| |
| /* sk_is_sorted returns one if |sk| is known to be sorted and zero |
| * otherwise. */ |
| OPENSSL_EXPORT int sk_is_sorted(const _STACK *sk); |
| |
| /* sk_set_cmp_func sets the comparison function to be used by |sk| and returns |
| * the previous one. */ |
| OPENSSL_EXPORT stack_cmp_func sk_set_cmp_func(_STACK *sk, stack_cmp_func comp); |
| |
| /* sk_deep_copy performs a copy of |sk| and of each of the non-NULL elements in |
| * |sk| by using |copy_func|. If an error occurs, |free_func| is used to free |
| * any copies already made and NULL is returned. */ |
| OPENSSL_EXPORT _STACK *sk_deep_copy(const _STACK *sk, |
| void *(*copy_func)(void *), |
| void (*free_func)(void *)); |
| |
| |
| #if defined(__cplusplus) |
| } /* extern C */ |
| #endif |
| |
| #endif /* OPENSSL_HEADER_STACK_H */ |
