Make DH opaque

[openssl.git] / include / openssl / dh.h

diff --git a/include/openssl/dh.h b/include/openssl/dh.h
index 90cfb82d8521be340186dc4b1f3dc7bc94261f62..c4708c4f68634a1403b1efcf0e3b9c422471af1c 100644 (file)
--- a/include/openssl/dh.h
+++ b/include/openssl/dh.h
@@ -58,19 +58,21 @@
 #ifndef HEADER_DH_H
 # define HEADER_DH_H
 
-# include <openssl/e_os2.h>
 # include <openssl/opensslconf.h>
 
-# ifdef OPENSSL_NO_DH
-#  error DH is disabled.
-# endif
-
+# ifndef OPENSSL_NO_DH
+# include <openssl/e_os2.h>
 # include <openssl/bio.h>
+# include <openssl/asn1.h>
 # include <openssl/ossl_typ.h>
 # if OPENSSL_API_COMPAT < 0x10100000L
 #  include <openssl/bn.h>
 # endif
 
+# ifdef  __cplusplus
+extern "C" {
+# endif
+
 # ifndef OPENSSL_DH_MAX_MODULUS_BITS
 #  define OPENSSL_DH_MAX_MODULUS_BITS    10000
 # endif
@@ -78,15 +80,6 @@
 # define OPENSSL_DH_FIPS_MIN_MODULUS_BITS 1024
 
 # 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
 
 /*
@@ -106,10 +99,6 @@
 
 # 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; */
@@ -132,31 +121,7 @@ struct dh_method {
                             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 % p */
-    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;
-};
+DECLARE_ASN1_ITEM(DHparams)
 
 # define DH_GENERATOR_2          2
 /* #define DH_GENERATOR_3       3 */
@@ -174,7 +139,7 @@ struct dh_st {
 /* DH_check_pub_key error codes */
 # define DH_CHECK_PUBKEY_TOO_SMALL       0x01
 # define DH_CHECK_PUBKEY_TOO_LARGE       0x02
-# define DH_CHECK_PUBKEY_INVALID         0x03
+# define DH_CHECK_PUBKEY_INVALID         0x04
 
 /*
  * primes p where (p-1)/2 is prime too are called "safe"; we define this for
@@ -246,6 +211,18 @@ int DH_KDF_X9_42(unsigned char *out, size_t outlen,
                  const unsigned char *ukm, size_t ukmlen, const EVP_MD *md);
 # endif
 
+void DH_get0_pqg(const DH *dh, BIGNUM **p, BIGNUM **q, BIGNUM **g);
+int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g);
+void DH_get0_key(const DH *dh, BIGNUM **pub_key, BIGNUM **priv_key);
+int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key);
+void DH_clear_flags(DH *dh, int flags);
+int DH_test_flags(const DH *dh, int flags);
+void DH_set_flags(DH *dh, int flags);
+ENGINE *DH_get0_engine(DH *d);
+long DH_get_length(const DH *dh);
+int DH_set_length(DH *dh, long length);
+
+
 # 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)
@@ -385,7 +362,9 @@ void ERR_load_DH_strings(void);
 # define DH_R_PEER_KEY_ERROR                              111
 # define DH_R_SHARED_INFO_ERROR                           113
 
-#ifdef  __cplusplus
+# ifdef  __cplusplus
 }
-#endif
+# endif
+# endif
+
 #endif