--- /dev/null
+/* Written by Dr Stephen N Henson (steve@openssl.org) 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 "cryptlib.h"
+#include <openssl/asn1t.h>
+#include <openssl/x509.h>
+#include <openssl/evp.h>
+#include <openssl/dh.h>
+#include <openssl/bn.h>
+#include "evp_locl.h"
+
+/* DH pkey context structure */
+
+typedef struct
+ {
+ /* Parameter gen parameters */
+ int prime_len;
+ int generator;
+ int use_dsa;
+ /* Keygen callback info */
+ int gentmp[2];
+ /* message digest */
+ } DH_PKEY_CTX;
+
+static int pkey_dh_init(EVP_PKEY_CTX *ctx)
+ {
+ DH_PKEY_CTX *dctx;
+ dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX));
+ if (!dctx)
+ return 0;
+ dctx->prime_len = 1024;
+ dctx->generator = 2;
+ dctx->use_dsa = 0;
+
+ ctx->data = dctx;
+ ctx->keygen_info = dctx->gentmp;
+ ctx->keygen_info_count = 2;
+
+ return 1;
+ }
+
+static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
+ {
+ DH_PKEY_CTX *dctx, *sctx;
+ if (!pkey_dh_init(dst))
+ return 0;
+ sctx = src->data;
+ dctx = dst->data;
+ dctx->prime_len = sctx->prime_len;
+ dctx->generator = sctx->generator;
+ dctx->use_dsa = sctx->use_dsa;
+ return 1;
+ }
+
+static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx)
+ {
+ DH_PKEY_CTX *dctx = ctx->data;
+ if (dctx)
+ OPENSSL_free(dctx);
+ }
+
+static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
+ {
+ DH_PKEY_CTX *dctx = ctx->data;
+ switch (type)
+ {
+ case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
+ if (p1 < 256)
+ return -2;
+ dctx->prime_len = p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
+ dctx->generator = p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_PEER_KEY:
+ /* Default behaviour is OK */
+ return 1;
+
+ default:
+ return -2;
+
+ }
+ }
+
+
+static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx,
+ const char *type, const char *value)
+ {
+ if (!strcmp(type, "dh_paramgen_prime_len"))
+ {
+ int len;
+ len = atoi(value);
+ return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len);
+ }
+ if (!strcmp(type, "dh_paramgen_generator"))
+ {
+ int len;
+ len = atoi(value);
+ return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len);
+ }
+ return -2;
+ }
+
+static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
+ {
+ DH *dh = NULL;
+ DH_PKEY_CTX *dctx = ctx->data;
+ BN_GENCB *pcb, cb;
+ int ret;
+ if (ctx->pkey_gencb)
+ {
+ pcb = &cb;
+ evp_pkey_set_cb_translate(pcb, ctx);
+ }
+ else
+ pcb = NULL;
+ dh = DH_new();
+ if (!dh)
+ return 0;
+ ret = DH_generate_parameters_ex(dh,
+ dctx->prime_len, dctx->generator, pcb);
+ if (ret)
+ EVP_PKEY_assign_DH(pkey, dh);
+ else
+ DH_free(dh);
+ return ret;
+ }
+
+static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
+ {
+ DH *dh = NULL;
+ if (ctx->pkey == NULL)
+ {
+ DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
+ return 0;
+ }
+ dh = DH_new();
+ if (!dh)
+ return 0;
+ EVP_PKEY_assign_DH(pkey, dh);
+ /* Note: if error return, pkey is freed by parent routine */
+ if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
+ return 0;
+ return DH_generate_key(pkey->pkey.dh);
+ }
+
+static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)
+ {
+ int ret;
+ if (!ctx->pkey || !ctx->peerkey)
+ {
+ DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
+ return 0;
+ }
+ ret = DH_compute_key(key, ctx->peerkey->pkey.dh->pub_key,
+ ctx->pkey->pkey.dh);
+ if (ret < 0)
+ return ret;
+ *keylen = ret;
+ return 1;
+ }
+
+const EVP_PKEY_METHOD dh_pkey_meth =
+ {
+ EVP_PKEY_DH,
+ EVP_PKEY_FLAG_AUTOARGLEN,
+ pkey_dh_init,
+ pkey_dh_copy,
+ pkey_dh_cleanup,
+
+ 0,
+ pkey_dh_paramgen,
+
+ 0,
+ pkey_dh_keygen,
+
+ 0,
+ 0,
+
+ 0,
+ 0,
+
+ 0,0,
+
+ 0,0,0,0,
+
+ 0,0,
+
+ 0,0,
+
+ 0,
+ pkey_dh_derive,
+
+ pkey_dh_ctrl,
+ pkey_dh_ctrl_str
+
+ };
projects / cassiopeia.git / blobdiff