+ return BN_security_bits(BN_num_bits(dh->params.p), N);
+}
+
+void DH_get0_pqg(const DH *dh,
+ const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
+{
+ ffc_params_get0_pqg(&dh->params, p, q, g);
+}
+
+int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
+{
+ /*
+ * If the fields p and g in d are NULL, the corresponding input
+ * parameters MUST be non-NULL. q may remain NULL.
+ */
+ if ((dh->params.p == NULL && p == NULL)
+ || (dh->params.g == NULL && g == NULL))
+ return 0;
+
+ ffc_params_set0_pqg(&dh->params, p, q, g);
+ dh_cache_named_group(dh);
+ if (q != NULL)
+ dh->length = BN_num_bits(q);
+ /*
+ * Check if this is a named group. If it finds a named group then the
+ * 'q' and 'length' value are either already set or are set by the
+ * call.
+ */
+ if (DH_get_nid(dh) == NID_undef) {
+ /* If its not a named group then set the 'length' if q is not NULL */
+ if (q != NULL)
+ dh->length = BN_num_bits(q);
+ }
+ dh->dirty_cnt++;
+ return 1;
+}
+
+long DH_get_length(const DH *dh)
+{
+ return dh->length;
+}
+
+int DH_set_length(DH *dh, long length)
+{
+ dh->length = length;
+ return 1;
+}
+
+void DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key)
+{
+ if (pub_key != NULL)
+ *pub_key = dh->pub_key;
+ if (priv_key != NULL)
+ *priv_key = dh->priv_key;
+}
+
+int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key)
+{
+ if (pub_key != NULL) {
+ BN_clear_free(dh->pub_key);
+ dh->pub_key = pub_key;
+ }
+ if (priv_key != NULL) {
+ BN_clear_free(dh->priv_key);
+ dh->priv_key = priv_key;
+ dh->length = BN_num_bits(priv_key);
+ }
+
+ dh->dirty_cnt++;
+ return 1;
+}
+
+const BIGNUM *DH_get0_p(const DH *dh)
+{
+ return dh->params.p;
+}
+
+const BIGNUM *DH_get0_q(const DH *dh)
+{
+ return dh->params.q;
+}
+
+const BIGNUM *DH_get0_g(const DH *dh)
+{
+ return dh->params.g;
+}
+
+const BIGNUM *DH_get0_priv_key(const DH *dh)
+{
+ return dh->priv_key;
+}
+
+const BIGNUM *DH_get0_pub_key(const DH *dh)
+{
+ return dh->pub_key;
+}
+
+void DH_clear_flags(DH *dh, int flags)
+{
+ dh->flags &= ~flags;
+}
+
+int DH_test_flags(const DH *dh, int flags)
+{
+ return dh->flags & flags;
+}
+
+void DH_set_flags(DH *dh, int flags)
+{
+ dh->flags |= flags;
+}
+
+#ifndef FIPS_MODE
+ENGINE *DH_get0_engine(DH *dh)
+{
+ return dh->engine;
+}
+#endif /*FIPS_MODE */
+
+FFC_PARAMS *dh_get0_params(DH *dh)
+{
+ return &dh->params;
+}
+int dh_get0_nid(const DH *dh)
+{
+ return dh->params.nid;
+}
+
+int dh_ffc_params_fromdata(DH *dh, const OSSL_PARAM params[])
+{
+ int ret;
+ FFC_PARAMS *ffc;
+
+ if (dh == NULL)
+ return 0;
+ ffc = dh_get0_params(dh);
+ if (ffc == NULL)
+ return 0;
+
+ ret = ffc_params_fromdata(ffc, params);
+ if (ret) {
+ dh_cache_named_group(dh);
+ dh->dirty_cnt++;
+ }
+ return ret;
+}
+
+static int dh_paramgen_check(EVP_PKEY_CTX *ctx)
+{
+ if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
+ /* Uses the same return values as EVP_PKEY_CTX_ctrl */
+ return -2;
+ }
+ /* If key type not DH return error */
+ if (ctx->pmeth != NULL
+ && ctx->pmeth->pkey_id != EVP_PKEY_DH
+ && ctx->pmeth->pkey_id != EVP_PKEY_DHX)
+ return -1;
+ return 1;
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_gindex(EVP_PKEY_CTX *ctx, int gindex)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+ *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_FFC_GINDEX, &gindex);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_seed(EVP_PKEY_CTX *ctx,
+ const unsigned char *seed,
+ size_t seedlen)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_FFC_SEED,
+ (void *)seed, seedlen);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_type(EVP_PKEY_CTX *ctx, int typ)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ const char *name;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_PARAMGEN_TYPE, typ, NULL);
+#endif
+
+ name = dh_gen_type_id2name(typ);
+ if (name == NULL)
+ return 0;
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE,
+ (char *) name, 0);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_prime_len(EVP_PKEY_CTX *ctx, int pbits)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ size_t bits = pbits;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, pbits,
+ NULL);
+#endif
+ *p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_FFC_PBITS, &bits);
+ *p++ = OSSL_PARAM_construct_end();
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_subprime_len(EVP_PKEY_CTX *ctx, int qbits)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ size_t bits2 = qbits;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN, qbits,
+ NULL);
+#endif
+ *p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_FFC_QBITS, &bits2);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_generator(EVP_PKEY_CTX *ctx, int gen)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL);
+#endif
+
+ *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_FFC_GENERATOR, &gen);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_rfc5114(EVP_PKEY_CTX *ctx, int gen)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ const char *name;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_RFC5114, gen, NULL);
+#endif
+ name = ffc_named_group_from_uid(gen);
+ if (name == NULL)
+ return 0;
+
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_GROUP,
+ (void *)name, 0);
+ *p++ = OSSL_PARAM_construct_end();
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dhx_rfc5114(EVP_PKEY_CTX *ctx, int gen)
+{
+ return EVP_PKEY_CTX_set_dh_rfc5114(ctx, gen);
+}
+
+int EVP_PKEY_CTX_set_dh_nid(EVP_PKEY_CTX *ctx, int nid)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ const char *name;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH,
+ EVP_PKEY_OP_PARAMGEN | EVP_PKEY_OP_KEYGEN,
+ EVP_PKEY_CTRL_DH_NID, nid, NULL);
+#endif
+ name = ffc_named_group_from_uid(nid);
+ if (name == NULL)
+ return 0;
+
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_GROUP,
+ (void *)name, 0);
+ *p++ = OSSL_PARAM_construct_end();
+ return EVP_PKEY_CTX_set_params(ctx, params);