diff options
Diffstat (limited to 'crypto/ecdh/ech_kdf.c')
| -rw-r--r-- | crypto/ecdh/ech_kdf.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/crypto/ecdh/ech_kdf.c b/crypto/ecdh/ech_kdf.c deleted file mode 100644 index ac722ac9ee69..000000000000 --- a/crypto/ecdh/ech_kdf.c +++ /dev/null @@ -1,111 +0,0 @@ -/* crypto/ecdh/ec_kdf.c */ -/* - * Written by Stephen Henson for the OpenSSL project. - */ -/* ==================================================================== - * Copyright (c) 2013 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 - * openssl-core@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. - * ==================================================================== - */ - -#define OPENSSL_FIPSAPI - -#include <string.h> -#include <openssl/ecdh.h> -#include <openssl/evp.h> - -/* Key derivation function from X9.62/SECG */ -/* Way more than we will ever need */ -#define ECDH_KDF_MAX (1 << 30) - -int ECDH_KDF_X9_62(unsigned char *out, size_t outlen, - const unsigned char *Z, size_t Zlen, - const unsigned char *sinfo, size_t sinfolen, - const EVP_MD *md) -{ - EVP_MD_CTX mctx; - int rv = 0; - unsigned int i; - size_t mdlen; - unsigned char ctr[4]; - if (sinfolen > ECDH_KDF_MAX || outlen > ECDH_KDF_MAX - || Zlen > ECDH_KDF_MAX) - return 0; - mdlen = EVP_MD_size(md); - EVP_MD_CTX_init(&mctx); - for (i = 1;; i++) { - unsigned char mtmp[EVP_MAX_MD_SIZE]; - EVP_DigestInit_ex(&mctx, md, NULL); - ctr[3] = i & 0xFF; - ctr[2] = (i >> 8) & 0xFF; - ctr[1] = (i >> 16) & 0xFF; - ctr[0] = (i >> 24) & 0xFF; - if (!EVP_DigestUpdate(&mctx, Z, Zlen)) - goto err; - if (!EVP_DigestUpdate(&mctx, ctr, sizeof(ctr))) - goto err; - if (!EVP_DigestUpdate(&mctx, sinfo, sinfolen)) - goto err; - if (outlen >= mdlen) { - if (!EVP_DigestFinal(&mctx, out, NULL)) - goto err; - outlen -= mdlen; - if (outlen == 0) - break; - out += mdlen; - } else { - if (!EVP_DigestFinal(&mctx, mtmp, NULL)) - goto err; - memcpy(out, mtmp, outlen); - OPENSSL_cleanse(mtmp, mdlen); - break; - } - } - rv = 1; - err: - EVP_MD_CTX_cleanup(&mctx); - return rv; -} |