Make CMAC API similar to HMAC API. Add methods for CMAC.

[openssl.git] / crypto / cmac / cm_ameth.c

diff --git a/crypto/cmac/cm_ameth.c b/crypto/cmac/cm_ameth.c
new file mode 100644 (file)
index 0000000..58a1a9d
--- /dev/null
+++ b/crypto/cmac/cm_ameth.c
@@ -0,0 +1,102 @@
+/* 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.
+ * ====================================================================
+ *
+ * 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/evp.h>
+#include <openssl/cmac.h>
+#include "asn1_locl.h"
+
+/* CMAC "ASN1" method. This is just here to indicate the
+ * maximum CMAC output length and to free up a CMAC
+ * key.
+ */
+
+static int cmac_size(const EVP_PKEY *pkey)
+       {
+       return EVP_MAX_BLOCK_LENGTH;
+       }
+
+static void cmac_key_free(EVP_PKEY *pkey)
+       {
+       CMAC_CTX *cmctx = (CMAC_CTX *)pkey->pkey.ptr;
+       if (cmctx)
+               CMAC_CTX_free(cmctx);
+       }
+
+const EVP_PKEY_ASN1_METHOD cmac_asn1_meth = 
+       {
+       EVP_PKEY_CMAC,
+       EVP_PKEY_CMAC,
+       0,
+
+       "CMAC",
+       "OpenSSL CMAC method",
+
+       0,0,0,0,
+
+       0,0,0,
+
+       cmac_size,
+       0,
+       0,0,0,0,0,0,
+
+       cmac_key_free,
+       0,
+       0,0
+       };
+