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+/* crypto/dh/dh.h */
+/* 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 HEADER_DH_H
+# define HEADER_DH_H
+
+# include <openssl/e_os2.h>
+
+# ifdef OPENSSL_NO_DH
+# error DH is disabled.
+# endif
+
+# ifndef OPENSSL_NO_BIO
+# include <openssl/bio.h>
+# endif
+# include <openssl/ossl_typ.h>
+# ifndef OPENSSL_NO_DEPRECATED
+# include <openssl/bn.h>
+# endif
+
+# ifndef OPENSSL_DH_MAX_MODULUS_BITS
+# define OPENSSL_DH_MAX_MODULUS_BITS 10000
+# endif
+
+# define DH_FLAG_CACHE_MONT_P 0x01
+
+/*
+ * new with 0.9.7h; the built-in DH
+ * implementation now uses constant time
+ * modular exponentiation for secret exponents
+ * by default. This flag causes the
+ * faster variable sliding window method to
+ * be used for all exponents.
+ */
+# define DH_FLAG_NO_EXP_CONSTTIME 0x02
+
+/*
+ * If this flag is set the DH method is FIPS compliant and can be used in
+ * FIPS mode. This is set in the validated module method. If an application
+ * sets this flag in its own methods it is its reposibility to ensure the
+ * result is compliant.
+ */
+
+# define DH_FLAG_FIPS_METHOD 0x0400
+
+/*
+ * If this flag is set the operations normally disabled in FIPS mode are
+ * permitted it is then the applications responsibility to ensure that the
+ * usage is compliant.
+ */
+
+# define DH_FLAG_NON_FIPS_ALLOW 0x0400
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Already defined in ossl_typ.h */
+/* typedef struct dh_st DH; */
+/* typedef struct dh_method DH_METHOD; */
+
+struct dh_method {
+ const char *name;
+ /* Methods here */
+ int (*generate_key) (DH *dh);
+ int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh);
+ /* Can be null */
+ int (*bn_mod_exp) (const DH *dh, BIGNUM *r, const BIGNUM *a,
+ const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
+ BN_MONT_CTX *m_ctx);
+ int (*init) (DH *dh);
+ int (*finish) (DH *dh);
+ int flags;
+ char *app_data;
+ /* If this is non-NULL, it will be used to generate parameters */
+ int (*generate_params) (DH *dh, int prime_len, int generator,
+ BN_GENCB *cb);
+};
+
+struct dh_st {
+ /*
+ * This first argument is used to pick up errors when a DH is passed
+ * instead of a EVP_PKEY
+ */
+ int pad;
+ int version;
+ BIGNUM *p;
+ BIGNUM *g;
+ long length; /* optional */
+ BIGNUM *pub_key; /* g^x */
+ BIGNUM *priv_key; /* x */
+ int flags;
+ 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 references;
+ CRYPTO_EX_DATA ex_data;
+ const DH_METHOD *meth;
+ ENGINE *engine;
+};
+
+# define DH_GENERATOR_2 2
+/* #define DH_GENERATOR_3 3 */
+# define DH_GENERATOR_5 5
+
+/* DH_check error codes */
+# define DH_CHECK_P_NOT_PRIME 0x01
+# define DH_CHECK_P_NOT_SAFE_PRIME 0x02
+# define DH_UNABLE_TO_CHECK_GENERATOR 0x04
+# define DH_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
+
+/* DH_check_pub_key error codes */
+# define DH_CHECK_PUBKEY_TOO_SMALL 0x01
+# define DH_CHECK_PUBKEY_TOO_LARGE 0x02
+
+/*
+ * primes p where (p-1)/2 is prime too are called "safe"; we define this for
+ * backward compatibility:
+ */
+# define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
+
+# define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
+ (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
+# define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
+ (unsigned char *)(x))
+# define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x)
+# define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x)
+
+DH *DHparams_dup(DH *);
+
+const DH_METHOD *DH_OpenSSL(void);
+
+void DH_set_default_method(const DH_METHOD *meth);
+const DH_METHOD *DH_get_default_method(void);
+int DH_set_method(DH *dh, const DH_METHOD *meth);
+DH *DH_new_method(ENGINE *engine);
+
+DH *DH_new(void);
+void DH_free(DH *dh);
+int DH_up_ref(DH *dh);
+int DH_size(const DH *dh);
+int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
+ CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
+int DH_set_ex_data(DH *d, int idx, void *arg);
+void *DH_get_ex_data(DH *d, int idx);
+
+/* Deprecated version */
+# ifndef OPENSSL_NO_DEPRECATED
+DH *DH_generate_parameters(int prime_len, int generator,
+ void (*callback) (int, int, void *), void *cb_arg);
+# endif /* !defined(OPENSSL_NO_DEPRECATED) */
+
+/* New version */
+int DH_generate_parameters_ex(DH *dh, int prime_len, int generator,
+ BN_GENCB *cb);
+
+int DH_check(const DH *dh, int *codes);
+int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *codes);
+int DH_generate_key(DH *dh);
+int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);
+int DH_compute_key_padded(unsigned char *key, const BIGNUM *pub_key, DH *dh);
+DH *d2i_DHparams(DH **a, const unsigned char **pp, long length);
+int i2d_DHparams(const DH *a, unsigned char **pp);
+DH *d2i_DHxparams(DH **a, const unsigned char **pp, long length);
+int i2d_DHxparams(const DH *a, unsigned char **pp);
+# ifndef OPENSSL_NO_FP_API
+int DHparams_print_fp(FILE *fp, const DH *x);
+# endif
+# ifndef OPENSSL_NO_BIO
+int DHparams_print(BIO *bp, const DH *x);
+# else
+int DHparams_print(char *bp, const DH *x);
+# endif
+
+/* RFC 5114 parameters */
+DH *DH_get_1024_160(void);
+DH *DH_get_2048_224(void);
+DH *DH_get_2048_256(void);
+
+/* RFC2631 KDF */
+int DH_KDF_X9_42(unsigned char *out, size_t outlen,
+ const unsigned char *Z, size_t Zlen,
+ ASN1_OBJECT *key_oid,
+ const unsigned char *ukm, size_t ukmlen, const EVP_MD *md);
+
+# define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
+ EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, len, NULL)
+
+# define EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, len) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
+ EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN, len, NULL)
+
+# define EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
+ EVP_PKEY_CTRL_DH_PARAMGEN_TYPE, typ, NULL)
+
+# define EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, gen) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
+ EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL)
+
+# define EVP_PKEY_CTX_set_dh_rfc5114(ctx, gen) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
+ EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)
+
+# define EVP_PKEY_CTX_set_dhx_rfc5114(ctx, gen) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
+ EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)
+
+# define EVP_PKEY_CTX_set_dh_kdf_type(ctx, kdf) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_DH_KDF_TYPE, kdf, NULL)
+
+# define EVP_PKEY_CTX_get_dh_kdf_type(ctx) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_DH_KDF_TYPE, -2, NULL)
+
+# define EVP_PKEY_CTX_set0_dh_kdf_oid(ctx, oid) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_DH_KDF_OID, 0, (void *)oid)
+
+# define EVP_PKEY_CTX_get0_dh_kdf_oid(ctx, poid) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_GET_DH_KDF_OID, 0, (void *)poid)
+
+# define EVP_PKEY_CTX_set_dh_kdf_md(ctx, md) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_DH_KDF_MD, 0, (void *)md)
+
+# define EVP_PKEY_CTX_get_dh_kdf_md(ctx, pmd) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_GET_DH_KDF_MD, 0, (void *)pmd)
+
+# define EVP_PKEY_CTX_set_dh_kdf_outlen(ctx, len) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_DH_KDF_OUTLEN, len, NULL)
+
+# define EVP_PKEY_CTX_get_dh_kdf_outlen(ctx, plen) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN, 0, (void *)plen)
+
+# define EVP_PKEY_CTX_set0_dh_kdf_ukm(ctx, p, plen) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_DH_KDF_UKM, plen, (void *)p)
+
+# define EVP_PKEY_CTX_get0_dh_kdf_ukm(ctx, p) \
+ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
+ EVP_PKEY_OP_DERIVE, \
+ EVP_PKEY_CTRL_GET_DH_KDF_UKM, 0, (void *)p)
+
+# define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN (EVP_PKEY_ALG_CTRL + 1)
+# define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR (EVP_PKEY_ALG_CTRL + 2)
+# define EVP_PKEY_CTRL_DH_RFC5114 (EVP_PKEY_ALG_CTRL + 3)
+# define EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN (EVP_PKEY_ALG_CTRL + 4)
+# define EVP_PKEY_CTRL_DH_PARAMGEN_TYPE (EVP_PKEY_ALG_CTRL + 5)
+# define EVP_PKEY_CTRL_DH_KDF_TYPE (EVP_PKEY_ALG_CTRL + 6)
+# define EVP_PKEY_CTRL_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 7)
+# define EVP_PKEY_CTRL_GET_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 8)
+# define EVP_PKEY_CTRL_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 9)
+# define EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 10)
+# define EVP_PKEY_CTRL_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 11)
+# define EVP_PKEY_CTRL_GET_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 12)
+# define EVP_PKEY_CTRL_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 13)
+# define EVP_PKEY_CTRL_GET_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 14)
+
+/* KDF types */
+# define EVP_PKEY_DH_KDF_NONE 1
+# define EVP_PKEY_DH_KDF_X9_42 2
+
+/* BEGIN ERROR CODES */
+/*
+ * The following lines are auto generated by the script mkerr.pl. Any changes
+ * made after this point may be overwritten when the script is next run.
+ */
+void ERR_load_DH_strings(void);
+
+/* Error codes for the DH functions. */
+
+/* Function codes. */
+# define DH_F_COMPUTE_KEY 102
+# define DH_F_DHPARAMS_PRINT_FP 101
+# define DH_F_DH_BUILTIN_GENPARAMS 106
+# define DH_F_DH_CMS_DECRYPT 117
+# define DH_F_DH_CMS_SET_PEERKEY 118
+# define DH_F_DH_CMS_SET_SHARED_INFO 119
+# define DH_F_DH_COMPUTE_KEY 114
+# define DH_F_DH_GENERATE_KEY 115
+# define DH_F_DH_GENERATE_PARAMETERS_EX 116
+# define DH_F_DH_NEW_METHOD 105
+# define DH_F_DH_PARAM_DECODE 107
+# define DH_F_DH_PRIV_DECODE 110
+# define DH_F_DH_PRIV_ENCODE 111
+# define DH_F_DH_PUB_DECODE 108
+# define DH_F_DH_PUB_ENCODE 109
+# define DH_F_DO_DH_PRINT 100
+# define DH_F_GENERATE_KEY 103
+# define DH_F_GENERATE_PARAMETERS 104
+# define DH_F_PKEY_DH_DERIVE 112
+# define DH_F_PKEY_DH_KEYGEN 113
+
+/* Reason codes. */
+# define DH_R_BAD_GENERATOR 101
+# define DH_R_BN_DECODE_ERROR 109
+# define DH_R_BN_ERROR 106
+# define DH_R_DECODE_ERROR 104
+# define DH_R_INVALID_PUBKEY 102
+# define DH_R_KDF_PARAMETER_ERROR 112
+# define DH_R_KEYS_NOT_SET 108
+# define DH_R_KEY_SIZE_TOO_SMALL 110
+# define DH_R_MODULUS_TOO_LARGE 103
+# define DH_R_NON_FIPS_METHOD 111
+# define DH_R_NO_PARAMETERS_SET 107
+# define DH_R_NO_PRIVATE_VALUE 100
+# define DH_R_PARAMETER_ENCODING_ERROR 105
+# define DH_R_PEER_KEY_ERROR 113
+# define DH_R_SHARED_INFO_ERROR 114
+
+#ifdef __cplusplus
+}
+#endif
+#endif
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