Initial keygen support.
diff --git a/crypto/evp/pmeth_gn.c b/crypto/evp/pmeth_gn.c
new file mode 100644
index 0000000..4972d5e
--- /dev/null
+++ b/crypto/evp/pmeth_gn.c
@@ -0,0 +1,193 @@
+/* pmeth_gn.c */
+/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+ * project 2006.
+ */
+/* ====================================================================
+ * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
+ *
+ * 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 above 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 acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <openssl/objects.h>
+#include "cryptlib.h"
+#include <openssl/evp.h>
+#include "evp_locl.h"
+
+int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
+ {
+ int ret;
+ if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen)
+ {
+ EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT,
+ EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return -2;
+ }
+ ctx->operation = EVP_PKEY_OP_PARAMGEN;
+ if (!ctx->pmeth->paramgen_init)
+ return 1;
+ ret = ctx->pmeth->paramgen_init(ctx);
+ if (ret <= 0)
+ ctx->operation = EVP_PKEY_OP_UNDEFINED;
+ return ret;
+ }
+
+int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
+ {
+ int ret;
+ if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen)
+ {
+ EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
+ EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return -2;
+ }
+
+ if (ctx->operation != EVP_PKEY_OP_PARAMGEN)
+ {
+ EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
+ return -1;
+ }
+
+ if (!ppkey)
+ return -1;
+
+ if (!*ppkey)
+ *ppkey = EVP_PKEY_new();
+
+ ret = ctx->pmeth->paramgen(ctx, *ppkey);
+ if (ret <= 0)
+ {
+ EVP_PKEY_free(*ppkey);
+ *ppkey = NULL;
+ }
+ return ret;
+ }
+
+int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
+ {
+ int ret;
+ if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen)
+ {
+ EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
+ EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return -2;
+ }
+ ctx->operation = EVP_PKEY_OP_KEYGEN;
+ if (!ctx->pmeth->keygen_init)
+ return 1;
+ ret = ctx->pmeth->keygen_init(ctx);
+ if (ret <= 0)
+ ctx->operation = EVP_PKEY_OP_UNDEFINED;
+ return ret;
+ }
+
+int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
+ {
+ int ret;
+
+ if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen)
+ {
+ EVPerr(EVP_F_EVP_PKEY_KEYGEN,
+ EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return -2;
+ }
+ if (ctx->operation != EVP_PKEY_OP_KEYGEN)
+ {
+ EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED);
+ return -1;
+ }
+
+ if (!ppkey)
+ return -1;
+
+ if (!*ppkey)
+ *ppkey = EVP_PKEY_new();
+
+ ret = ctx->pmeth->keygen(ctx, *ppkey);
+ if (ret <= 0)
+ {
+ EVP_PKEY_free(*ppkey);
+ *ppkey = NULL;
+ }
+ return ret;
+ }
+
+void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
+ {
+ ctx->pkey_gencb = cb;
+ }
+
+/* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB
+ * style callbacks.
+ */
+
+static int trans_cb(int a, int b, BN_GENCB *gcb)
+ {
+ EVP_PKEY_CTX *ctx = gcb->arg;
+ ctx->keygen_info[0] = a;
+ ctx->keygen_info[1] = b;
+ return ctx->pkey_gencb(ctx);
+ }
+
+void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
+ {
+ BN_GENCB_set(cb, trans_cb, ctx)
+ }
+
+int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
+ {
+ if (idx == -1)
+ return ctx->keygen_info_count;
+ if (idx < 0 || idx > ctx->keygen_info_count)
+ return 0;
+ return ctx->keygen_info[idx];
+ }
