fa1ba589f3
now print out signatures instead of the standard hex dump. More complex signatures (e.g. PSS) can print out more meaningful information. Sample DSA version included that prints out the signature parameters r, s. [Note EVP_PKEY_ASN1_METHOD is an application opaque structure so adding new fields in the middle has no compatibility issues]
167 lines
4.5 KiB
C
167 lines
4.5 KiB
C
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project 2007.
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*/
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/* ====================================================================
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* Copyright (c) 2007 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/evp.h>
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#include "asn1_locl.h"
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#define HMAC_TEST_PRIVATE_KEY_FORMAT
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/* HMAC "ASN1" method. This is just here to indicate the
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* maximum HMAC output length and to free up an HMAC
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* key.
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*/
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static int hmac_size(const EVP_PKEY *pkey)
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{
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return EVP_MAX_MD_SIZE;
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}
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static void hmac_key_free(EVP_PKEY *pkey)
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{
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ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
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if (os)
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{
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if (os->data)
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OPENSSL_cleanse(os->data, os->length);
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ASN1_OCTET_STRING_free(os);
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}
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}
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static int hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
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{
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switch (op)
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{
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case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
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*(int *)arg2 = NID_sha1;
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return 1;
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default:
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return -2;
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}
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}
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#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT
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/* A bogus private key format for test purposes. This is simply the
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* HMAC key with "HMAC PRIVATE KEY" in the headers. When enabled the
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* genpkey utility can be used to "generate" HMAC keys.
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*/
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static int old_hmac_decode(EVP_PKEY *pkey,
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const unsigned char **pder, int derlen)
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{
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ASN1_OCTET_STRING *os;
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os = ASN1_OCTET_STRING_new();
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if (!os || !ASN1_OCTET_STRING_set(os, *pder, derlen))
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return 0;
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EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, os);
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return 1;
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}
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static int old_hmac_encode(const EVP_PKEY *pkey, unsigned char **pder)
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{
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int inc;
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ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
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if (pder)
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{
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if (!*pder)
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{
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*pder = OPENSSL_malloc(os->length);
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inc = 0;
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}
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else inc = 1;
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memcpy(*pder, os->data, os->length);
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if (inc)
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*pder += os->length;
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}
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return os->length;
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}
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#endif
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const EVP_PKEY_ASN1_METHOD hmac_asn1_meth =
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{
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EVP_PKEY_HMAC,
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EVP_PKEY_HMAC,
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0,
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"HMAC",
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"OpenSSL HMAC method",
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0,0,0,0,
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0,0,0,
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hmac_size,
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0,
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0,0,0,0,0,0,0,
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hmac_key_free,
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hmac_pkey_ctrl,
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#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT
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old_hmac_decode,
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old_hmac_encode
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#else
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0,0
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#endif
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};
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