--- /dev/null
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2010.
+ */
+/* ====================================================================
+ * Copyright (c) 2010 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.
+ * ====================================================================
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include <openssl/evp.h>
+#include <openssl/cmac.h>
+#include "evp_locl.h"
+
+/* The context structure and "key" is simply a CMAC_CTX */
+
+static int pkey_cmac_init(EVP_PKEY_CTX *ctx)
+ {
+ ctx->data = CMAC_CTX_new();
+ if (!ctx->data)
+ return 0;
+ ctx->keygen_info_count = 0;
+ return 1;
+ }
+
+static int pkey_cmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
+ {
+ if (!pkey_cmac_init(dst))
+ return 0;
+ if (!CMAC_CTX_copy(dst->data, src->data))
+ return 0;
+ return 1;
+ }
+
+static void pkey_cmac_cleanup(EVP_PKEY_CTX *ctx)
+ {
+ CMAC_CTX_free(ctx->data);
+ }
+
+static int pkey_cmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
+ {
+ CMAC_CTX *cmkey = CMAC_CTX_new();
+ CMAC_CTX *cmctx = ctx->data;
+ if (!cmkey)
+ return 0;
+ if (!CMAC_CTX_copy(cmkey, cmctx))
+ {
+ CMAC_CTX_free(cmkey);
+ return 0;
+ }
+ EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey);
+
+ return 1;
+ }
+
+static int int_update(EVP_MD_CTX *ctx,const void *data,size_t count)
+ {
+ if (!CMAC_Update(ctx->pctx->data, data, count))
+ return 0;
+ return 1;
+ }
+
+static int cmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
+ {
+ EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
+ mctx->update = int_update;
+ return 1;
+ }
+
+static int cmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
+ EVP_MD_CTX *mctx)
+ {
+ return CMAC_Final(ctx->data, sig, siglen);
+ }
+
+static int pkey_cmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
+ {
+ CMAC_CTX *cmctx = ctx->data;
+ switch (type)
+ {
+
+ case EVP_PKEY_CTRL_SET_MAC_KEY:
+ if (!p2 || p1 < 0)
+ return 0;
+ if (!CMAC_Init(cmctx, p2, p1, NULL, NULL))
+ return 0;
+ break;
+
+ case EVP_PKEY_CTRL_CIPHER:
+ if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine))
+ return 0;
+ break;
+
+ case EVP_PKEY_CTRL_MD:
+ if (ctx->pkey && !CMAC_CTX_copy(ctx->data,
+ (CMAC_CTX *)ctx->pkey->pkey.ptr))
+ return 0;
+ if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL))
+ return 0;
+ break;
+
+ default:
+ return -2;
+
+ }
+ return 1;
+ }
+
+static int pkey_cmac_ctrl_str(EVP_PKEY_CTX *ctx,
+ const char *type, const char *value)
+ {
+ if (!value)
+ {
+ return 0;
+ }
+ if (!strcmp(type, "key"))
+ {
+ void *p = (void *)value;
+ return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
+ strlen(p), p);
+ }
+ if (!strcmp(type, "cipher"))
+ {
+ const EVP_CIPHER *c;
+ c = EVP_get_cipherbyname(value);
+ if (!c)
+ return 0;
+ return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
+ }
+ if (!strcmp(type, "hexkey"))
+ {
+ unsigned char *key;
+ int r;
+ long keylen;
+ key = string_to_hex(value, &keylen);
+ if (!key)
+ return 0;
+ r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
+ OPENSSL_free(key);
+ return r;
+ }
+ return -2;
+ }
+
+const EVP_PKEY_METHOD cmac_pkey_meth =
+ {
+ EVP_PKEY_CMAC,
+ EVP_PKEY_FLAG_SIGCTX_CUSTOM,
+ pkey_cmac_init,
+ pkey_cmac_copy,
+ pkey_cmac_cleanup,
+
+ 0, 0,
+
+ 0,
+ pkey_cmac_keygen,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0,0,
+
+ cmac_signctx_init,
+ cmac_signctx,
+
+ 0,0,
+
+ 0,0,
+
+ 0,0,
+
+ 0,0,
+
+ pkey_cmac_ctrl,
+ pkey_cmac_ctrl_str
+
+ };
projects / cassiopeia.git / blobdiff