diff options
Diffstat (limited to 'openssl/crypto/hmac/hm_ameth.c')
| -rw-r--r-- | openssl/crypto/hmac/hm_ameth.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/openssl/crypto/hmac/hm_ameth.c b/openssl/crypto/hmac/hm_ameth.c new file mode 100644 index 00000000..6d8a8914 --- /dev/null +++ b/openssl/crypto/hmac/hm_ameth.c @@ -0,0 +1,167 @@ +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL + * project 2007. + */ +/* ==================================================================== + * Copyright (c) 2007 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 "asn1_locl.h" + +#define HMAC_TEST_PRIVATE_KEY_FORMAT + +/* HMAC "ASN1" method. This is just here to indicate the + * maximum HMAC output length and to free up an HMAC + * key. + */ + +static int hmac_size(const EVP_PKEY *pkey) + { + return EVP_MAX_MD_SIZE; + } + +static void hmac_key_free(EVP_PKEY *pkey) + { + ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; + if (os) + { + if (os->data) + OPENSSL_cleanse(os->data, os->length); + ASN1_OCTET_STRING_free(os); + } + } + + +static int hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) + { + switch (op) + { + case ASN1_PKEY_CTRL_DEFAULT_MD_NID: + *(int *)arg2 = NID_sha1; + return 1; + + default: + return -2; + } + } + +#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT +/* A bogus private key format for test purposes. This is simply the + * HMAC key with "HMAC PRIVATE KEY" in the headers. When enabled the + * genpkey utility can be used to "generate" HMAC keys. + */ + +static int old_hmac_decode(EVP_PKEY *pkey, + const unsigned char **pder, int derlen) + { + ASN1_OCTET_STRING *os; + os = ASN1_OCTET_STRING_new(); + if (!os || !ASN1_OCTET_STRING_set(os, *pder, derlen)) + return 0; + EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, os); + return 1; + } + +static int old_hmac_encode(const EVP_PKEY *pkey, unsigned char **pder) + { + int inc; + ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; + if (pder) + { + if (!*pder) + { + *pder = OPENSSL_malloc(os->length); + inc = 0; + } + else inc = 1; + + memcpy(*pder, os->data, os->length); + + if (inc) + *pder += os->length; + } + + return os->length; + } + +#endif + +const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = + { + EVP_PKEY_HMAC, + EVP_PKEY_HMAC, + 0, + + "HMAC", + "OpenSSL HMAC method", + + 0,0,0,0, + + 0,0,0, + + hmac_size, + 0, + 0,0,0,0,0,0, + + hmac_key_free, + hmac_pkey_ctrl, +#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT + old_hmac_decode, + old_hmac_encode +#else + 0,0 +#endif + }; + |