Make DH_METHOD opaque

Move the dh_method structure into an internal header file and provide
relevant accessors for the internal fields.

Reviewed-by: Richard Levitte <levitte@openssl.org>

1 files changed, 30 insertions, 18 deletions

diff --git a/include/openssl/dh.h b/include/openssl/dh.h
index c4708c4f68..d78bac9c43 100644
--- a/include/openssl/dh.h
+++ b/include/openssl/dh.h
@@ -103,24 +103,6 @@ extern "C" {
 /* 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);
-};
-
 DECLARE_ASN1_ITEM(DHparams)
 
 # define DH_GENERATOR_2          2
@@ -222,6 +204,36 @@ ENGINE *DH_get0_engine(DH *d);
 long DH_get_length(const DH *dh);
 int DH_set_length(DH *dh, long length);
 
+DH_METHOD *DH_meth_new(const char *name, int flags);
+void DH_meth_free(DH_METHOD *dhm);
+DH_METHOD *DH_meth_dup(const DH_METHOD *dhm);
+const char *DH_meth_get0_name(const DH_METHOD *dhm);
+int DH_meth_set1_name(DH_METHOD *dhm, const char *name);
+int DH_meth_get_flags(DH_METHOD *dhm);
+int DH_meth_set_flags(DH_METHOD *dhm, int flags);
+void *DH_meth_get0_app_data(const DH_METHOD *dhm);
+int DH_meth_set0_app_data(DH_METHOD *dhm, void *app_data);
+int (*DH_meth_get_generate_key(const DH_METHOD *dhm)) (DH *);
+int DH_meth_set_generate_key(DH_METHOD *dhm, int (*generate_key) (DH *));
+int (*DH_meth_get_compute_key(const DH_METHOD *dhm))
+        (unsigned char *key, const BIGNUM *pub_key, DH *dh);
+int DH_meth_set_compute_key(DH_METHOD *dhm,
+        int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh));
+int (*DH_meth_get_bn_mod_exp(const DH_METHOD *dhm))
+    (const DH *, BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
+     BN_CTX *, BN_MONT_CTX *);
+int DH_meth_set_bn_mod_exp(DH_METHOD *dhm,
+    int (*bn_mod_exp) (const DH *, BIGNUM *, const BIGNUM *, const BIGNUM *,
+                       const BIGNUM *, BN_CTX *, BN_MONT_CTX *));
+int (*DH_meth_get_init(const DH_METHOD *dhm))(DH *);
+int DH_meth_set_init(DH_METHOD *dhm, int (*init)(DH *));
+int (*DH_meth_get_finish(const DH_METHOD *dhm)) (DH *);
+int DH_meth_set_finish(DH_METHOD *dhm, int (*finish) (DH *));
+int (*DH_meth_get_generate_params(const DH_METHOD *dhm))
+        (DH *, int, int, BN_GENCB *);
+int DH_meth_set_generate_params(DH_METHOD *dhm,
+        int (*generate_params) (DH *, int, int, BN_GENCB *));
+
 
 # define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \
         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \