8d79ed6740
MSVC doesn't define __cplusplus as 201103 to indicate C++11 support, so just assume that the compiler supports C++11 if _MSC_VER is defined. Change-Id: I27f6eeefe6e8dc522470f36fab76ab36d85eebac Reviewed-on: https://boringssl-review.googlesource.com/8734 Reviewed-by: David Benjamin <davidben@google.com>
279 lines
10 KiB
C++
279 lines
10 KiB
C++
/* 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_DH_H
|
|
#define OPENSSL_HEADER_DH_H
|
|
|
|
#include <openssl/base.h>
|
|
|
|
#include <openssl/engine.h>
|
|
#include <openssl/ex_data.h>
|
|
#include <openssl/thread.h>
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/* DH contains functions for performing Diffie-Hellman key agreement in
|
|
* multiplicative groups. */
|
|
|
|
|
|
/* Allocation and destruction. */
|
|
|
|
/* DH_new returns a new, empty DH object or NULL on error. */
|
|
OPENSSL_EXPORT DH *DH_new(void);
|
|
|
|
/* DH_free decrements the reference count of |dh| and frees it if the reference
|
|
* count drops to zero. */
|
|
OPENSSL_EXPORT void DH_free(DH *dh);
|
|
|
|
/* DH_up_ref increments the reference count of |dh|. */
|
|
OPENSSL_EXPORT int DH_up_ref(DH *dh);
|
|
|
|
|
|
/* Standard parameters.
|
|
*
|
|
* These functions return new DH objects with standard parameters. They return
|
|
* NULL on allocation failure. The |engine| parameter is ignored. */
|
|
|
|
/* These parameters are taken from RFC 5114. */
|
|
|
|
OPENSSL_EXPORT DH *DH_get_1024_160(const ENGINE *engine);
|
|
OPENSSL_EXPORT DH *DH_get_2048_224(const ENGINE *engine);
|
|
OPENSSL_EXPORT DH *DH_get_2048_256(const ENGINE *engine);
|
|
|
|
|
|
/* Parameter generation. */
|
|
|
|
#define DH_GENERATOR_2 2
|
|
#define DH_GENERATOR_5 5
|
|
|
|
/* DH_generate_parameters_ex generates a suitable Diffie-Hellman group with a
|
|
* prime that is |prime_bits| long and stores it in |dh|. The generator of the
|
|
* group will be |generator|, which should be |DH_GENERATOR_2| unless there's a
|
|
* good reason to use a different value. The |cb| argument contains a callback
|
|
* function that will be called during the generation. See the documentation in
|
|
* |bn.h| about this. In addition to the callback invocations from |BN|, |cb|
|
|
* will also be called with |event| equal to three when the generation is
|
|
* complete. */
|
|
OPENSSL_EXPORT int DH_generate_parameters_ex(DH *dh, int prime_bits,
|
|
int generator, BN_GENCB *cb);
|
|
|
|
|
|
/* Diffie-Hellman operations. */
|
|
|
|
/* DH_generate_key generates a new, random, private key and stores it in
|
|
* |dh|. It returns one on success and zero on error. */
|
|
OPENSSL_EXPORT int DH_generate_key(DH *dh);
|
|
|
|
/* DH_compute_key calculates the shared key between |dh| and |peers_key| and
|
|
* writes it as a big-endian integer into |out|, which must have |DH_size|
|
|
* bytes of space. It returns the number of bytes written, or a negative number
|
|
* on error. */
|
|
OPENSSL_EXPORT int DH_compute_key(uint8_t *out, const BIGNUM *peers_key,
|
|
DH *dh);
|
|
|
|
|
|
/* Utility functions. */
|
|
|
|
/* DH_size returns the number of bytes in the DH group's prime. */
|
|
OPENSSL_EXPORT int DH_size(const DH *dh);
|
|
|
|
/* DH_num_bits returns the minimum number of bits needed to represent the
|
|
* absolute value of the DH group's prime. */
|
|
OPENSSL_EXPORT unsigned DH_num_bits(const DH *dh);
|
|
|
|
#define DH_CHECK_P_NOT_PRIME 0x01
|
|
#define DH_CHECK_P_NOT_SAFE_PRIME 0x02
|
|
#define DH_CHECK_UNABLE_TO_CHECK_GENERATOR 0x04
|
|
#define DH_CHECK_NOT_SUITABLE_GENERATOR 0x08
|
|
#define DH_CHECK_Q_NOT_PRIME 0x10
|
|
#define DH_CHECK_INVALID_Q_VALUE 0x20
|
|
#define DH_CHECK_INVALID_J_VALUE 0x40
|
|
|
|
/* These are compatibility defines. */
|
|
#define DH_NOT_SUITABLE_GENERATOR DH_CHECK_NOT_SUITABLE_GENERATOR
|
|
#define DH_UNABLE_TO_CHECK_GENERATOR DH_CHECK_UNABLE_TO_CHECK_GENERATOR
|
|
|
|
/* DH_check checks the suitability of |dh| as a Diffie-Hellman group. and sets
|
|
* |DH_CHECK_*| flags in |*out_flags| if it finds any errors. It returns one if
|
|
* |*out_flags| was successfully set and zero on error.
|
|
*
|
|
* Note: these checks may be quite computationally expensive. */
|
|
OPENSSL_EXPORT int DH_check(const DH *dh, int *out_flags);
|
|
|
|
#define DH_CHECK_PUBKEY_TOO_SMALL 0x1
|
|
#define DH_CHECK_PUBKEY_TOO_LARGE 0x2
|
|
#define DH_CHECK_PUBKEY_INVALID 0x4
|
|
|
|
/* DH_check_pub_key checks the suitability of |pub_key| as a public key for the
|
|
* DH group in |dh| and sets |DH_CHECK_PUBKEY_*| flags in |*out_flags| if it
|
|
* finds any errors. It returns one if |*out_flags| was successfully set and
|
|
* zero on error. */
|
|
OPENSSL_EXPORT int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key,
|
|
int *out_flags);
|
|
|
|
/* DHparams_dup allocates a fresh |DH| and copies the parameters from |dh| into
|
|
* it. It returns the new |DH| or NULL on error. */
|
|
OPENSSL_EXPORT DH *DHparams_dup(const DH *dh);
|
|
|
|
|
|
/* ASN.1 functions. */
|
|
|
|
/* DH_parse_parameters decodes a DER-encoded DHParameter structure (PKCS #3)
|
|
* from |cbs| and advances |cbs|. It returns a newly-allocated |DH| or NULL on
|
|
* error. */
|
|
OPENSSL_EXPORT DH *DH_parse_parameters(CBS *cbs);
|
|
|
|
/* DH_marshal_parameters marshals |dh| as a DER-encoded DHParameter structure
|
|
* (PKCS #3) and appends the result to |cbb|. It returns one on success and zero
|
|
* on error. */
|
|
OPENSSL_EXPORT int DH_marshal_parameters(CBB *cbb, const DH *dh);
|
|
|
|
|
|
/* ex_data functions.
|
|
*
|
|
* See |ex_data.h| for details. */
|
|
|
|
OPENSSL_EXPORT int DH_get_ex_new_index(long argl, void *argp,
|
|
CRYPTO_EX_unused *unused,
|
|
CRYPTO_EX_dup *dup_func,
|
|
CRYPTO_EX_free *free_func);
|
|
OPENSSL_EXPORT int DH_set_ex_data(DH *d, int idx, void *arg);
|
|
OPENSSL_EXPORT void *DH_get_ex_data(DH *d, int idx);
|
|
|
|
|
|
/* Deprecated functions. */
|
|
|
|
/* DH_generate_parameters behaves like |DH_generate_parameters_ex|, which is
|
|
* what you should use instead. It returns NULL on error, or a newly-allocated
|
|
* |DH| on success. This function is provided for compatibility only. */
|
|
OPENSSL_EXPORT DH *DH_generate_parameters(int prime_len, int generator,
|
|
void (*callback)(int, int, void *),
|
|
void *cb_arg);
|
|
|
|
/* d2i_DHparams parses an ASN.1, DER encoded Diffie-Hellman parameters structure
|
|
* from |len| bytes at |*inp|. If |ret| is not NULL then, on exit, a pointer to
|
|
* the result is in |*ret|. Note that, even if |*ret| is already non-NULL on
|
|
* entry, it will not be written to. Rather, a fresh |DH| is allocated and the
|
|
* previous one is freed.
|
|
*
|
|
* On successful exit, |*inp| is advanced past the DER structure. It
|
|
* returns the result or NULL on error.
|
|
*
|
|
* Use |DH_parse_parameters| instead. */
|
|
OPENSSL_EXPORT DH *d2i_DHparams(DH **ret, const unsigned char **inp, long len);
|
|
|
|
/* i2d_DHparams marshals |in| to an ASN.1, DER structure. If |outp| is not NULL
|
|
* then the result is written to |*outp| and |*outp| is advanced just past the
|
|
* output. It returns the number of bytes in the result, whether written or
|
|
* not, or a negative value on error.
|
|
*
|
|
* Use |DH_marshal_parameters| instead. */
|
|
OPENSSL_EXPORT int i2d_DHparams(const DH *in, unsigned char **outp);
|
|
|
|
|
|
struct dh_st {
|
|
BIGNUM *p;
|
|
BIGNUM *g;
|
|
BIGNUM *pub_key; /* g^x mod p */
|
|
BIGNUM *priv_key; /* x */
|
|
|
|
/* priv_length contains the length, in bits, of the private value. If zero,
|
|
* the private value will be the same length as |p|. */
|
|
unsigned priv_length;
|
|
|
|
CRYPTO_MUTEX method_mont_p_lock;
|
|
BN_MONT_CTX *method_mont_p;
|
|
|
|
/* Place holders if we want to do X9.42 DH */
|
|
BIGNUM *q;
|
|
BIGNUM *j;
|
|
unsigned char *seed;
|
|
int seedlen;
|
|
BIGNUM *counter;
|
|
|
|
int flags;
|
|
CRYPTO_refcount_t references;
|
|
CRYPTO_EX_DATA ex_data;
|
|
};
|
|
|
|
|
|
#if defined(__cplusplus)
|
|
} /* extern C */
|
|
|
|
#if defined(BORINGSSL_HAVE_CXX11)
|
|
|
|
namespace bssl {
|
|
|
|
using ScopedDH = ScopedType<DH, DH_free>;
|
|
|
|
} // namespace bssl
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#define DH_R_BAD_GENERATOR 100
|
|
#define DH_R_INVALID_PUBKEY 101
|
|
#define DH_R_MODULUS_TOO_LARGE 102
|
|
#define DH_R_NO_PRIVATE_VALUE 103
|
|
#define DH_R_DECODE_ERROR 104
|
|
#define DH_R_ENCODE_ERROR 105
|
|
|
|
#endif /* OPENSSL_HEADER_DH_H */
|