X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdh%2Fdh.h;h=c15b2ad48364ea6f385914978ab29b0336aab9f7;hp=3ae16f3b0ca7e4c74bffbc16ea92aabe11b0b5a4;hb=90644dd74d5c5262831bb0be73e1226778099924;hpb=a9be3af5ad4836f7e50f0546311ca90c717b861e

diff --git a/crypto/dh/dh.h b/crypto/dh/dh.h
index 3ae16f3b0c..c15b2ad483 100644
--- a/crypto/dh/dh.h
+++ b/crypto/dh/dh.h
@@ -63,11 +63,33 @@
 extern "C" {
 #endif
 
+#ifdef NO_DH
+#error DH is disabled.
+#endif
+
 #include <openssl/bn.h>
+#include <openssl/crypto.h>
 	
 #define DH_FLAG_CACHE_MONT_P	0x01
 
-typedef struct dh_st
+typedef struct dh_st DH;
+
+typedef struct dh_method {
+	const char *name;
+	/* Methods here */
+	int (*generate_key)(DH *dh);
+	int (*compute_key)(unsigned char *key,BIGNUM *pub_key,DH *dh);
+	int (*bn_mod_exp)(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
+				const BIGNUM *m, BN_CTX *ctx,
+				BN_MONT_CTX *m_ctx); /* Can be null */
+
+	int (*init)(DH *dh);
+	int (*finish)(DH *dh);
+	int flags;
+	char *app_data;
+} DH_METHOD;
+
+struct dh_st
 	{
 	/* This first argument is used to pick up errors when
 	 * a DH is passed instead of a EVP_PKEY */
@@ -76,12 +98,22 @@ typedef struct dh_st
 	BIGNUM *p;
 	BIGNUM *g;
 	int length; /* optional */
-	BIGNUM *pub_key;	/* y */
+	BIGNUM *pub_key;	/* g^x */
 	BIGNUM *priv_key;	/* x */
 
 	int flags;
 	char *method_mont_p;
-	} DH;
+	/* 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;
+	DH_METHOD *meth;
+	};
 
 #define DH_GENERATOR_2		2
 /* #define DH_GENERATOR_3	3 */
@@ -89,10 +121,14 @@ typedef struct dh_st
 
 /* DH_check error codes */
 #define DH_CHECK_P_NOT_PRIME		0x01
-#define DH_CHECK_P_NOT_STRONG_PRIME	0x02
+#define DH_CHECK_P_NOT_SAFE_PRIME	0x02
 #define DH_UNABLE_TO_CHECK_GENERATOR	0x04
 #define DH_NOT_SUITABLE_GENERATOR	0x08
 
+/* 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 DHparams_dup(x) (DH *)ASN1_dup((int (*)())i2d_DHparams, \
 		(char *(*)())d2i_DHparams,(char *)(x))
 #define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
@@ -101,14 +137,30 @@ typedef struct dh_st
 		(unsigned char *)(x))
 #define d2i_DHparams_bio(bp,x) (DH *)ASN1_d2i_bio((char *(*)())DH_new, \
 		(char *(*)())d2i_DHparams,(bp),(unsigned char **)(x))
+#ifdef  __cplusplus
+#define i2d_DHparams_bio(bp,x) ASN1_i2d_bio((int (*)())i2d_DHparams,(bp), \
+		(unsigned char *)(x))
+#else
 #define i2d_DHparams_bio(bp,x) ASN1_i2d_bio(i2d_DHparams,(bp), \
 		(unsigned char *)(x))
+#endif
+
+DH_METHOD *DH_OpenSSL(void);
+
+void DH_set_default_method(DH_METHOD *meth);
+DH_METHOD *DH_get_default_method(void);
+DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth);
+DH *DH_new_method(DH_METHOD *meth);
 
 DH *	DH_new(void);
 void	DH_free(DH *dh);
 int	DH_size(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);
 DH *	DH_generate_parameters(int prime_len,int generator,
-		void (*callback)(int,int,char *),char *cb_arg);
+		void (*callback)(int,int,void *),void *cb_arg);
 int	DH_check(DH *dh,int *codes);
 int	DH_generate_key(DH *dh);
 int	DH_compute_key(unsigned char *key,BIGNUM *pub_key,DH *dh);