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boringssl/include/openssl/base.h
David Benjamin 01f8a8c2d5 Convert stack.h to use inline functions. 
Instead of a script which generates macros, emit static inlines in
individual header (or C files). This solves a few issues with the
original setup:

- The documentation was off. We match the documentation now.

- The stack macros did not check constness; see some of the fixes in
  crypto/x509.

- Type errors did not look like usual type errors.

- Any type which participated in STACK_OF had to be made partially
  public. This allows stack types to be defined an internal header or
  even an individual file.

- One could not pass sk_FOO_free into something which expects a function
  pointer.

Thanks to upstream's 411abf2dd37974a5baa54859c1abcd287b3c1181 for the
idea.

Change-Id: Ie5431390ccad761c17596b0e93941b0d7a68f904
Reviewed-on: https://boringssl-review.googlesource.com/16087
Reviewed-by: Adam Langley <agl@google.com>
2017-05-22 15:06:04 +00:00

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/* ====================================================================
* Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com). */
#ifndef OPENSSL_HEADER_BASE_H
#define OPENSSL_HEADER_BASE_H
/* This file should be the first included by all BoringSSL headers. */
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#if defined(__MINGW32__)
/* stdio.h is needed on MinGW for __MINGW_PRINTF_FORMAT. */
#include <stdio.h>
#endif
/* Include a BoringSSL-only header so consumers including this header without
* setting up include paths do not accidentally pick up the system
* opensslconf.h. */
#include <openssl/is_boringssl.h>
#include <openssl/opensslconf.h>
#if defined(BORINGSSL_PREFIX)
#include <boringssl_prefix_symbols.h>
#endif
#if defined(__cplusplus)
extern "C" {
#endif
#if defined(__x86_64) || defined(_M_AMD64) || defined(_M_X64)
#define OPENSSL_64_BIT
#define OPENSSL_X86_64
#elif defined(__x86) || defined(__i386) || defined(__i386__) || defined(_M_IX86)
#define OPENSSL_32_BIT
#define OPENSSL_X86
#elif defined(__aarch64__)
#define OPENSSL_64_BIT
#define OPENSSL_AARCH64
#elif defined(__arm) || defined(__arm__) || defined(_M_ARM)
#define OPENSSL_32_BIT
#define OPENSSL_ARM
#elif (defined(__PPC64__) || defined(__powerpc64__)) && defined(_LITTLE_ENDIAN)
#define OPENSSL_64_BIT
#define OPENSSL_PPC64LE
#elif defined(__mips__) && !defined(__LP64__)
#define OPENSSL_32_BIT
#define OPENSSL_MIPS
#elif defined(__mips__) && defined(__LP64__)
#define OPENSSL_64_BIT
#define OPENSSL_MIPS64
#elif defined(__pnacl__)
#define OPENSSL_32_BIT
#define OPENSSL_PNACL
#elif defined(__myriad2__)
#define OPENSSL_32_BIT
#else
#error "Unknown target CPU"
#endif
#if defined(__APPLE__)
#define OPENSSL_APPLE
#endif
#if defined(_WIN32)
#define OPENSSL_WINDOWS
#endif
#if defined(__linux__)
#define OPENSSL_LINUX
#endif
#if defined(__Fuchsia__)
#define OPENSSL_FUCHSIA
#endif
#if defined(TRUSTY)
#define OPENSSL_TRUSTY
#define OPENSSL_NO_THREADS
#endif
#define OPENSSL_IS_BORINGSSL
#define BORINGSSL_201512
#define BORINGSSL_201603
#define OPENSSL_VERSION_NUMBER 0x100020af
#define SSLEAY_VERSION_NUMBER OPENSSL_VERSION_NUMBER
/* BORINGSSL_API_VERSION is a positive integer that increments as BoringSSL
* changes over time. The value itself is not meaningful. It will be incremented
* whenever is convenient to coordinate an API change with consumers. This will
* not denote any special point in development.
*
* A consumer may use this symbol in the preprocessor to temporarily build
* against multiple revisions of BoringSSL at the same time. It is not
* recommended to do so for longer than is necessary. */
#define BORINGSSL_API_VERSION 4
#if defined(BORINGSSL_SHARED_LIBRARY)
#if defined(OPENSSL_WINDOWS)
#if defined(BORINGSSL_IMPLEMENTATION)
#define OPENSSL_EXPORT __declspec(dllexport)
#else
#define OPENSSL_EXPORT __declspec(dllimport)
#endif
#else /* defined(OPENSSL_WINDOWS) */
#if defined(BORINGSSL_IMPLEMENTATION)
#define OPENSSL_EXPORT __attribute__((visibility("default")))
#else
#define OPENSSL_EXPORT
#endif
#endif /* defined(OPENSSL_WINDOWS) */
#else /* defined(BORINGSSL_SHARED_LIBRARY) */
#define OPENSSL_EXPORT
#endif /* defined(BORINGSSL_SHARED_LIBRARY) */
#if defined(__GNUC__)
/* MinGW has two different printf implementations. Ensure the format macro
* matches the selected implementation. See
* https://sourceforge.net/p/mingw-w64/wiki2/gnu%20printf/. */
#if defined(__MINGW_PRINTF_FORMAT)
#define OPENSSL_PRINTF_FORMAT_FUNC(string_index, first_to_check) \
__attribute__( \
(__format__(__MINGW_PRINTF_FORMAT, string_index, first_to_check)))
#else
#define OPENSSL_PRINTF_FORMAT_FUNC(string_index, first_to_check) \
__attribute__((__format__(__printf__, string_index, first_to_check)))
#endif
#else
#define OPENSSL_PRINTF_FORMAT_FUNC(string_index, first_to_check)
#endif
/* OPENSSL_MSVC_PRAGMA emits a pragma on MSVC and nothing on other compilers. */
#if defined(_MSC_VER)
#define OPENSSL_MSVC_PRAGMA(arg) __pragma(arg)
#else
#define OPENSSL_MSVC_PRAGMA(arg)
#endif
#if defined(__GNUC__)
#define OPENSSL_UNUSED __attribute__((unused))
#else
#define OPENSSL_UNUSED
#endif
#if defined(BORINGSSL_UNSAFE_FUZZER_MODE) && \
!defined(BORINGSSL_UNSAFE_DETERMINISTIC_MODE)
#define BORINGSSL_UNSAFE_DETERMINISTIC_MODE
#endif
#if defined(__has_feature)
#if __has_feature(address_sanitizer)
#define OPENSSL_ASAN
#endif
#endif
/* CRYPTO_THREADID is a dummy value. */
typedef int CRYPTO_THREADID;
typedef int ASN1_BOOLEAN;
typedef int ASN1_NULL;
typedef struct ASN1_ITEM_st ASN1_ITEM;
typedef struct asn1_object_st ASN1_OBJECT;
typedef struct asn1_pctx_st ASN1_PCTX;
typedef struct asn1_string_st ASN1_BIT_STRING;
typedef struct asn1_string_st ASN1_BMPSTRING;
typedef struct asn1_string_st ASN1_ENUMERATED;
typedef struct asn1_string_st ASN1_GENERALIZEDTIME;
typedef struct asn1_string_st ASN1_GENERALSTRING;
typedef struct asn1_string_st ASN1_IA5STRING;
typedef struct asn1_string_st ASN1_INTEGER;
typedef struct asn1_string_st ASN1_OCTET_STRING;
typedef struct asn1_string_st ASN1_PRINTABLESTRING;
typedef struct asn1_string_st ASN1_STRING;
typedef struct asn1_string_st ASN1_T61STRING;
typedef struct asn1_string_st ASN1_TIME;
typedef struct asn1_string_st ASN1_UNIVERSALSTRING;
typedef struct asn1_string_st ASN1_UTCTIME;
typedef struct asn1_string_st ASN1_UTF8STRING;
typedef struct asn1_string_st ASN1_VISIBLESTRING;
typedef struct asn1_type_st ASN1_TYPE;
typedef struct AUTHORITY_KEYID_st AUTHORITY_KEYID;
typedef struct BASIC_CONSTRAINTS_st BASIC_CONSTRAINTS;
typedef struct DIST_POINT_st DIST_POINT;
typedef struct DSA_SIG_st DSA_SIG;
typedef struct ISSUING_DIST_POINT_st ISSUING_DIST_POINT;
typedef struct NAME_CONSTRAINTS_st NAME_CONSTRAINTS;
typedef struct Netscape_certificate_sequence NETSCAPE_CERT_SEQUENCE;
typedef struct Netscape_spkac_st NETSCAPE_SPKAC;
typedef struct Netscape_spki_st NETSCAPE_SPKI;
typedef struct RIPEMD160state_st RIPEMD160_CTX;
typedef struct X509_POLICY_CACHE_st X509_POLICY_CACHE;
typedef struct X509_POLICY_LEVEL_st X509_POLICY_LEVEL;
typedef struct X509_POLICY_NODE_st X509_POLICY_NODE;
typedef struct X509_POLICY_TREE_st X509_POLICY_TREE;
typedef struct X509_VERIFY_PARAM_st X509_VERIFY_PARAM;
typedef struct X509_algor_st X509_ALGOR;
typedef struct X509_crl_info_st X509_CRL_INFO;
typedef struct X509_crl_st X509_CRL;
typedef struct X509_extension_st X509_EXTENSION;
typedef struct X509_info_st X509_INFO;
typedef struct X509_name_entry_st X509_NAME_ENTRY;
typedef struct X509_name_st X509_NAME;
typedef struct X509_objects_st X509_OBJECTS;
typedef struct X509_pubkey_st X509_PUBKEY;
typedef struct X509_req_info_st X509_REQ_INFO;
typedef struct X509_req_st X509_REQ;
typedef struct X509_sig_st X509_SIG;
typedef struct X509_val_st X509_VAL;
typedef struct bignum_ctx BN_CTX;
typedef struct bignum_st BIGNUM;
typedef struct bio_method_st BIO_METHOD;
typedef struct bio_st BIO;
typedef struct bn_gencb_st BN_GENCB;
typedef struct bn_mont_ctx_st BN_MONT_CTX;
typedef struct buf_mem_st BUF_MEM;
typedef struct cbb_st CBB;
typedef struct cbs_st CBS;
typedef struct cmac_ctx_st CMAC_CTX;
typedef struct conf_st CONF;
typedef struct conf_value_st CONF_VALUE;
typedef struct crypto_buffer_pool_st CRYPTO_BUFFER_POOL;
typedef struct crypto_buffer_st CRYPTO_BUFFER;
typedef struct dh_st DH;
typedef struct dsa_st DSA;
typedef struct ec_group_st EC_GROUP;
typedef struct ec_key_st EC_KEY;
typedef struct ec_point_st EC_POINT;
typedef struct ecdsa_method_st ECDSA_METHOD;
typedef struct ecdsa_sig_st ECDSA_SIG;
typedef struct engine_st ENGINE;
typedef struct env_md_ctx_st EVP_MD_CTX;
typedef struct env_md_st EVP_MD;
typedef struct evp_aead_st EVP_AEAD;
typedef struct evp_cipher_ctx_st EVP_CIPHER_CTX;
typedef struct evp_cipher_st EVP_CIPHER;
typedef struct evp_encode_ctx_st EVP_ENCODE_CTX;
typedef struct evp_pkey_asn1_method_st EVP_PKEY_ASN1_METHOD;
typedef struct evp_pkey_ctx_st EVP_PKEY_CTX;
typedef struct evp_pkey_method_st EVP_PKEY_METHOD;
typedef struct evp_pkey_st EVP_PKEY;
typedef struct hmac_ctx_st HMAC_CTX;
typedef struct md4_state_st MD4_CTX;
typedef struct md5_state_st MD5_CTX;
typedef struct pkcs12_st PKCS12;
typedef struct pkcs8_priv_key_info_st PKCS8_PRIV_KEY_INFO;
typedef struct private_key_st X509_PKEY;
typedef struct rand_meth_st RAND_METHOD;
typedef struct rc4_key_st RC4_KEY;
typedef struct rsa_meth_st RSA_METHOD;
typedef struct rsa_st RSA;
typedef struct sha256_state_st SHA256_CTX;
typedef struct sha512_state_st SHA512_CTX;
typedef struct sha_state_st SHA_CTX;
typedef struct spake2_ctx_st SPAKE2_CTX;
typedef struct srtp_protection_profile_st SRTP_PROTECTION_PROFILE;
typedef struct ssl_cipher_st SSL_CIPHER;
typedef struct ssl_ctx_st SSL_CTX;
typedef struct ssl_custom_extension SSL_CUSTOM_EXTENSION;
typedef struct ssl_method_st SSL_METHOD;
typedef struct ssl_private_key_method_st SSL_PRIVATE_KEY_METHOD;
typedef struct ssl_session_st SSL_SESSION;
typedef struct ssl_st SSL;
typedef struct ssl_ticket_aead_method_st SSL_TICKET_AEAD_METHOD;
typedef struct st_ERR_FNS ERR_FNS;
typedef struct v3_ext_ctx X509V3_CTX;
typedef struct x509_attributes_st X509_ATTRIBUTE;
typedef struct x509_cert_aux_st X509_CERT_AUX;
typedef struct x509_cert_pair_st X509_CERT_PAIR;
typedef struct x509_cinf_st X509_CINF;
typedef struct x509_crl_method_st X509_CRL_METHOD;
typedef struct x509_lookup_st X509_LOOKUP;
typedef struct x509_revoked_st X509_REVOKED;
typedef struct x509_st X509;
typedef struct x509_store_ctx_st X509_STORE_CTX;
typedef struct x509_store_st X509_STORE;
typedef struct x509_trust_st X509_TRUST;
typedef void *OPENSSL_BLOCK;
#if defined(__cplusplus)
} /* extern C */
// MSVC doesn't set __cplusplus to 201103 to indicate C++11 support (see
// https://connect.microsoft.com/VisualStudio/feedback/details/763051/a-value-of-predefined-macro-cplusplus-is-still-199711l)
// so MSVC is just assumed to support C++11.
#if !defined(BORINGSSL_NO_CXX) && __cplusplus < 201103L && !defined(_MSC_VER)
#define BORINGSSL_NO_CXX
#endif
#if !defined(BORINGSSL_NO_CXX)
extern "C++" {
#include <memory>
// STLPort, used by some Android consumers, not have std::unique_ptr.
#if defined(_STLPORT_VERSION)
#define BORINGSSL_NO_CXX
#endif
} // extern C++
#endif // !BORINGSSL_NO_CXX
#if defined(BORINGSSL_NO_CXX)
#define BORINGSSL_MAKE_DELETER(type, deleter)
#define BORINGSSL_MAKE_STACK_DELETER(type, deleter)
#else
extern "C++" {
#include <memory>
namespace bssl {
namespace internal {
template <typename T>
struct DeleterImpl {};
template <typename T>
struct Deleter {
void operator()(T *ptr) {
// Rather than specialize Deleter for each type, we specialize
// DeleterImpl. This allows bssl::UniquePtr<T> to be used while only
// including base.h as long as the destructor is not emitted. This matches
// std::unique_ptr's behavior on forward-declared types.
//
// DeleterImpl itself is specialized in the corresponding module's header
// and must be included to release an object. If not included, the compiler
// will error that DeleterImpl<T> does not have a method Free.
DeleterImpl<T>::Free(ptr);
}
};
template <typename T, typename CleanupRet, void (*init)(T *),
CleanupRet (*cleanup)(T *)>
class StackAllocated {
public:
StackAllocated() { init(&ctx_); }
~StackAllocated() { cleanup(&ctx_); }
StackAllocated(const StackAllocated<T, CleanupRet, init, cleanup> &) = delete;
T& operator=(const StackAllocated<T, CleanupRet, init, cleanup> &) = delete;
T *get() { return &ctx_; }
const T *get() const { return &ctx_; }
void Reset() {
cleanup(&ctx_);
init(&ctx_);
}
private:
T ctx_;
};
} // namespace internal
#define BORINGSSL_MAKE_DELETER(type, deleter) \
namespace internal { \
template <> \
struct DeleterImpl<type> { \
static void Free(type *ptr) { deleter(ptr); } \
}; \
}
// This makes a unique_ptr to STACK_OF(type) that owns all elements on the
// stack, i.e. it uses sk_pop_free() to clean up.
#define BORINGSSL_MAKE_STACK_DELETER(type, deleter) \
namespace internal { \
template <> \
struct DeleterImpl<STACK_OF(type)> { \
static void Free(STACK_OF(type) *ptr) { \
sk_##type##_pop_free(ptr, deleter); \
} \
}; \
}
// Holds ownership of heap-allocated BoringSSL structures. Sample usage:
// bssl::UniquePtr<RSA> rsa(RSA_new());
// bssl::UniquePtr<BIO> bio(BIO_new(BIO_s_mem()));
template <typename T>
using UniquePtr = std::unique_ptr<T, internal::Deleter<T>>;
} // namespace bssl
} /* extern C++ */
#endif // !BORINGSSL_NO_CXX
#endif
#endif /* OPENSSL_HEADER_BASE_H */
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