sl@0: /* crypto/dh/dh.h */ sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) sl@0: * All rights reserved. sl@0: * sl@0: * This package is an SSL implementation written sl@0: * by Eric Young (eay@cryptsoft.com). sl@0: * The implementation was written so as to conform with Netscapes SSL. sl@0: * sl@0: * This library is free for commercial and non-commercial use as long as sl@0: * the following conditions are aheared to. The following conditions sl@0: * apply to all code found in this distribution, be it the RC4, RSA, sl@0: * lhash, DES, etc., code; not just the SSL code. The SSL documentation sl@0: * included with this distribution is covered by the same copyright terms sl@0: * except that the holder is Tim Hudson (tjh@cryptsoft.com). sl@0: * sl@0: * Copyright remains Eric Young's, and as such any Copyright notices in sl@0: * the code are not to be removed. sl@0: * If this package is used in a product, Eric Young should be given attribution sl@0: * as the author of the parts of the library used. sl@0: * This can be in the form of a textual message at program startup or sl@0: * in documentation (online or textual) provided with the package. sl@0: * sl@0: * Redistribution and use in source and binary forms, with or without sl@0: * modification, are permitted provided that the following conditions sl@0: * are met: sl@0: * 1. Redistributions of source code must retain the copyright sl@0: * notice, this list of conditions and the following disclaimer. sl@0: * 2. Redistributions in binary form must reproduce the above copyright sl@0: * notice, this list of conditions and the following disclaimer in the sl@0: * documentation and/or other materials provided with the distribution. sl@0: * 3. All advertising materials mentioning features or use of this software sl@0: * must display the following acknowledgement: sl@0: * "This product includes cryptographic software written by sl@0: * Eric Young (eay@cryptsoft.com)" sl@0: * The word 'cryptographic' can be left out if the rouines from the library sl@0: * being used are not cryptographic related :-). sl@0: * 4. If you include any Windows specific code (or a derivative thereof) from sl@0: * the apps directory (application code) you must include an acknowledgement: sl@0: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" sl@0: * sl@0: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND sl@0: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE sl@0: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE sl@0: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE sl@0: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL sl@0: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS sl@0: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) sl@0: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT sl@0: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY sl@0: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF sl@0: * SUCH DAMAGE. sl@0: * sl@0: * The licence and distribution terms for any publically available version or sl@0: * derivative of this code cannot be changed. i.e. this code cannot simply be sl@0: * copied and put under another distribution licence sl@0: * [including the GNU Public Licence.] sl@0: */ sl@0: sl@0: #ifndef HEADER_DH_H sl@0: #define HEADER_DH_H sl@0: sl@0: #include sl@0: sl@0: #ifdef OPENSSL_NO_DH sl@0: #error DH is disabled. sl@0: #endif sl@0: sl@0: #ifndef OPENSSL_NO_BIO sl@0: #include sl@0: #endif sl@0: #include sl@0: #ifndef OPENSSL_NO_DEPRECATED sl@0: #include sl@0: #endif sl@0: #ifndef OPENSSL_DH_MAX_MODULUS_BITS sl@0: # define OPENSSL_DH_MAX_MODULUS_BITS 10000 sl@0: #endif sl@0: sl@0: sl@0: #define DH_FLAG_CACHE_MONT_P 0x01 sl@0: #define DH_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DH sl@0: * implementation now uses constant time sl@0: * modular exponentiation for secret exponents sl@0: * by default. This flag causes the sl@0: * faster variable sliding window method to sl@0: * be used for all exponents. sl@0: */ sl@0: sl@0: #ifdef __cplusplus sl@0: extern "C" { sl@0: #endif sl@0: sl@0: /* Already defined in ossl_typ.h */ sl@0: /* typedef struct dh_st DH; */ sl@0: /* typedef struct dh_method DH_METHOD; */ sl@0: sl@0: struct dh_method sl@0: { sl@0: const char *name; sl@0: /* Methods here */ sl@0: int (*generate_key)(DH *dh); sl@0: int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh); sl@0: int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a, sl@0: const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, sl@0: BN_MONT_CTX *m_ctx); /* Can be null */ sl@0: sl@0: int (*init)(DH *dh); sl@0: int (*finish)(DH *dh); sl@0: int flags; sl@0: char *app_data; sl@0: /* If this is non-NULL, it will be used to generate parameters */ sl@0: int (*generate_params)(DH *dh, int prime_len, int generator, BN_GENCB *cb); sl@0: }; sl@0: sl@0: struct dh_st sl@0: { sl@0: /* This first argument is used to pick up errors when sl@0: * a DH is passed instead of a EVP_PKEY */ sl@0: int pad; sl@0: int version; sl@0: BIGNUM *p; sl@0: BIGNUM *g; sl@0: long length; /* optional */ sl@0: BIGNUM *pub_key; /* g^x */ sl@0: BIGNUM *priv_key; /* x */ sl@0: sl@0: int flags; sl@0: BN_MONT_CTX *method_mont_p; sl@0: /* Place holders if we want to do X9.42 DH */ sl@0: BIGNUM *q; sl@0: BIGNUM *j; sl@0: unsigned char *seed; sl@0: int seedlen; sl@0: BIGNUM *counter; sl@0: sl@0: int references; sl@0: CRYPTO_EX_DATA ex_data; sl@0: const DH_METHOD *meth; sl@0: ENGINE *engine; sl@0: }; sl@0: sl@0: #define DH_GENERATOR_2 2 sl@0: /* #define DH_GENERATOR_3 3 */ sl@0: #define DH_GENERATOR_5 5 sl@0: sl@0: /* DH_check error codes */ sl@0: #define DH_CHECK_P_NOT_PRIME 0x01 sl@0: #define DH_CHECK_P_NOT_SAFE_PRIME 0x02 sl@0: #define DH_UNABLE_TO_CHECK_GENERATOR 0x04 sl@0: #define DH_NOT_SUITABLE_GENERATOR 0x08 sl@0: sl@0: /* DH_check_pub_key error codes */ sl@0: #define DH_CHECK_PUBKEY_TOO_SMALL 0x01 sl@0: #define DH_CHECK_PUBKEY_TOO_LARGE 0x02 sl@0: sl@0: /* primes p where (p-1)/2 is prime too are called "safe"; we define sl@0: this for backward compatibility: */ sl@0: #define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME sl@0: sl@0: #define DHparams_dup(x) ASN1_dup_of_const(DH,i2d_DHparams,d2i_DHparams,x) sl@0: #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \ sl@0: (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x)) sl@0: #define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \ sl@0: (unsigned char *)(x)) sl@0: #define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x) sl@0: #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x) sl@0: sl@0: IMPORT_C const DH_METHOD *DH_OpenSSL(void); sl@0: sl@0: IMPORT_C void DH_set_default_method(const DH_METHOD *meth); sl@0: IMPORT_C const DH_METHOD *DH_get_default_method(void); sl@0: IMPORT_C int DH_set_method(DH *dh, const DH_METHOD *meth); sl@0: IMPORT_C DH *DH_new_method(ENGINE *engine); sl@0: sl@0: IMPORT_C DH * DH_new(void); sl@0: IMPORT_C void DH_free(DH *dh); sl@0: IMPORT_C int DH_up_ref(DH *dh); sl@0: IMPORT_C int DH_size(const DH *dh); sl@0: IMPORT_C int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, sl@0: CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); sl@0: IMPORT_C int DH_set_ex_data(DH *d, int idx, void *arg); sl@0: IMPORT_C void *DH_get_ex_data(DH *d, int idx); sl@0: sl@0: /* Deprecated version */ sl@0: #ifndef OPENSSL_NO_DEPRECATED sl@0: IMPORT_C DH * DH_generate_parameters(int prime_len,int generator, sl@0: void (*callback)(int,int,void *),void *cb_arg); sl@0: #endif /* !defined(OPENSSL_NO_DEPRECATED) */ sl@0: sl@0: /* New version */ sl@0: IMPORT_C int DH_generate_parameters_ex(DH *dh, int prime_len,int generator, BN_GENCB *cb); sl@0: sl@0: IMPORT_C int DH_check(const DH *dh,int *codes); sl@0: IMPORT_C int DH_check_pub_key(const DH *dh,const BIGNUM *pub_key, int *codes); sl@0: IMPORT_C int DH_generate_key(DH *dh); sl@0: IMPORT_C int DH_compute_key(unsigned char *key,const BIGNUM *pub_key,DH *dh); sl@0: IMPORT_C DH * d2i_DHparams(DH **a,const unsigned char **pp, long length); sl@0: IMPORT_C int i2d_DHparams(const DH *a,unsigned char **pp); sl@0: #ifndef OPENSSL_NO_FP_API sl@0: IMPORT_C int DHparams_print_fp(FILE *fp, const DH *x); sl@0: #endif sl@0: #ifndef OPENSSL_NO_BIO sl@0: IMPORT_C int DHparams_print(BIO *bp, const DH *x); sl@0: #else sl@0: IMPORT_C int DHparams_print(char *bp, const DH *x); sl@0: #endif sl@0: sl@0: /* BEGIN ERROR CODES */ sl@0: /* The following lines are auto generated by the script mkerr.pl. Any changes sl@0: * made after this point may be overwritten when the script is next run. sl@0: */ sl@0: IMPORT_C void ERR_load_DH_strings(void); sl@0: sl@0: /* Error codes for the DH functions. */ sl@0: sl@0: /* Function codes. */ sl@0: #define DH_F_COMPUTE_KEY 102 sl@0: #define DH_F_DHPARAMS_PRINT 100 sl@0: #define DH_F_DHPARAMS_PRINT_FP 101 sl@0: #define DH_F_DH_BUILTIN_GENPARAMS 106 sl@0: #define DH_F_DH_NEW_METHOD 105 sl@0: #define DH_F_GENERATE_KEY 103 sl@0: #define DH_F_GENERATE_PARAMETERS 104 sl@0: sl@0: /* Reason codes. */ sl@0: #define DH_R_BAD_GENERATOR 101 sl@0: #define DH_R_NO_PRIVATE_VALUE 100 sl@0: #define DH_R_MODULUS_TOO_LARGE 103 sl@0: #define DH_R_INVALID_PUBKEY 102 sl@0: sl@0: #ifdef __cplusplus sl@0: } sl@0: #endif sl@0: #endif