195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* ==================================================================== 295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * The Elliptic Curve Public-Key Crypto Library (ECC Code) included 595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * herein is developed by SUN MICROSYSTEMS, INC., and is contributed 695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * to the OpenSSL project. 795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * The ECC Code is licensed pursuant to the OpenSSL open source 995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * license provided below. 1095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 1195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * The ECDH software is originally written by Douglas Stebila of 1295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Sun Microsystems Laboratories. 1395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 1495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley */ 1595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* ==================================================================== 1695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Copyright (c) 2000-2002 The OpenSSL Project. All rights reserved. 1795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 1895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Redistribution and use in source and binary forms, with or without 1995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * modification, are permitted provided that the following conditions 2095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * are met: 2195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 2295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 1. Redistributions of source code must retain the above copyright 2395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * notice, this list of conditions and the following disclaimer. 2495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 2595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 2. Redistributions in binary form must reproduce the above copyright 2695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * notice, this list of conditions and the following disclaimer in 2795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * the documentation and/or other materials provided with the 2895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * distribution. 2995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 3095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 3. All advertising materials mentioning features or use of this 3195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * software must display the following acknowledgment: 3295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * "This product includes software developed by the OpenSSL Project 3395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 3495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 3595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 3695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * endorse or promote products derived from this software without 3795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * prior written permission. For written permission, please contact 3895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * licensing@OpenSSL.org. 3995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 4095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 5. Products derived from this software may not be called "OpenSSL" 4195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * nor may "OpenSSL" appear in their names without prior written 4295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * permission of the OpenSSL Project. 4395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 4495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 6. Redistributions of any form whatsoever must retain the following 4595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * acknowledgment: 4695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * "This product includes software developed by the OpenSSL Project 4795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 4895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 4995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 5095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 5295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 5395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 5495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 5595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 5695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 5895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 5995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 6095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * OF THE POSSIBILITY OF SUCH DAMAGE. 6195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * ==================================================================== 6295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * 6395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * This product includes cryptographic software written by Eric Young 6495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * (eay@cryptsoft.com). This product includes software written by Tim 6595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley * Hudson (tjh@cryptsoft.com). */ 6695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 6795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/ecdh.h> 6895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 6995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/bn.h> 7095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/digest.h> 7195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/err.h> 7295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#include <openssl/mem.h> 7395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 7495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 7595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key, 7695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EC_KEY *priv_key, void *(*KDF)(const void *in, size_t inlen, 7795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley void *out, size_t *outlen)) { 7895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BN_CTX *ctx; 7995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EC_POINT *tmp = NULL; 8095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BIGNUM *x = NULL, *y = NULL; 8195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley const BIGNUM *priv; 8295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley const EC_GROUP *group; 8395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int ret = -1; 8495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley size_t buflen, len; 8595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley uint8_t *buf = NULL; 8695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 8795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if ((ctx = BN_CTX_new()) == NULL) { 8895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 8995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 9095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BN_CTX_start(ctx); 9195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley x = BN_CTX_get(ctx); 9295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley y = BN_CTX_get(ctx); 9395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 9495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley priv = EC_KEY_get0_private_key(priv_key); 9595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (priv == NULL) { 9695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(ECDH, ECDH_compute_key, ECDH_R_NO_PRIVATE_VALUE); 9795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 9895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 9995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 10095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley group = EC_KEY_get0_group(priv_key); 10195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 10295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley tmp = EC_POINT_new(group); 10395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (tmp == NULL) { 10495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(ECDH, ECDH_compute_key, ERR_R_MALLOC_FAILURE); 10595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 10695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 10795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 10895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!EC_POINT_mul(group, tmp, NULL, pub_key, priv, ctx)) { 10995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(ECDH, ECDH_compute_key, ECDH_R_POINT_ARITHMETIC_FAILURE); 11095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 11195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 11295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 11395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!EC_POINT_get_affine_coordinates_GFp(group, tmp, x, y, ctx)) { 11495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(ECDH, ECDH_compute_key, ECDH_R_POINT_ARITHMETIC_FAILURE); 11595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 11695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 11795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 11895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley buflen = (EC_GROUP_get_degree(group) + 7) / 8; 11995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley len = BN_num_bytes(x); 12095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (len > buflen) { 12195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(ECDH, ECDH_compute_key, ERR_R_INTERNAL_ERROR); 12295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 12395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 12495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley buf = OPENSSL_malloc(buflen); 12595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (buf == NULL) { 12695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(ECDH, ECDH_compute_key, ERR_R_MALLOC_FAILURE); 12795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 12895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 12995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 13095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memset(buf, 0, buflen - len); 13195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (len != (size_t)BN_bn2bin(x, buf + buflen - len)) { 13295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(ECDH, ECDH_compute_key, ERR_R_BN_LIB); 13395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 13495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 13595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 13695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (KDF != 0) { 13795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (KDF(buf, buflen, out, &outlen) == NULL) { 13895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_PUT_ERROR(ECDH, ECDH_compute_key, ECDH_R_KDF_FAILED); 13995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 14095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 14195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ret = outlen; 14295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 14395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley /* no KDF, just copy as much as we can */ 14495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (outlen > buflen) { 14595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley outlen = buflen; 14695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 14795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(out, buf, outlen); 14895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ret = outlen; 14995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 15095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 15195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyerr: 15295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (tmp) 15395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EC_POINT_free(tmp); 15495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (ctx) 15595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BN_CTX_end(ctx); 15695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (ctx) 15795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley BN_CTX_free(ctx); 15895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (buf) 15995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_free(buf); 16095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return ret; 16195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 16295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 16395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* Key derivation function from X9.62/SECG */ 16495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley/* Way more than we will ever need */ 16595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley#define ECDH_KDF_MAX (1 << 30) 16695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 16795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyint ECDH_KDF_X9_62(uint8_t *out, size_t outlen, const uint8_t *Z, 16895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley size_t Zlen, const uint8_t *sinfo, size_t sinfolen, 16995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley const EVP_MD *md) { 17095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EVP_MD_CTX mctx; 17195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley int rv = 0; 17295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley unsigned int i; 17395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley size_t mdlen; 17495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley uint8_t ctr[4]; 17595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 17695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (sinfolen > ECDH_KDF_MAX || outlen > ECDH_KDF_MAX || Zlen > ECDH_KDF_MAX) { 17795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return 0; 17895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 17995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley mdlen = EVP_MD_size(md); 18095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EVP_MD_CTX_init(&mctx); 18195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 18295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley for (i = 1;; i++) { 18395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley uint8_t mtmp[EVP_MAX_MD_SIZE]; 18495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EVP_DigestInit_ex(&mctx, md, NULL); 18595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ctr[3] = i & 0xFF; 18695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ctr[2] = (i >> 8) & 0xFF; 18795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ctr[1] = (i >> 16) & 0xFF; 18895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley ctr[0] = (i >> 24) & 0xFF; 18995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!EVP_DigestUpdate(&mctx, Z, Zlen) || 19095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley !EVP_DigestUpdate(&mctx, ctr, sizeof(ctr)) || 19195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley !EVP_DigestUpdate(&mctx, sinfo, sinfolen)) { 19295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 19395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 19495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 19595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (outlen >= mdlen) { 19695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!EVP_DigestFinal(&mctx, out, NULL)) { 19795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 19895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 19995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley outlen -= mdlen; 20095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (outlen == 0) { 20195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley break; 20295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 20395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley out += mdlen; 20495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } else { 20595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley if (!EVP_DigestFinal(&mctx, mtmp, NULL)) { 20695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley goto err; 20795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 20895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley memcpy(out, mtmp, outlen); 20995c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley OPENSSL_cleanse(mtmp, mdlen); 21095c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley break; 21195c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 21295c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley } 21395c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley rv = 1; 21495c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley 21595c29f3cd1f6c08c6c0927868683392eea727ccAdam Langleyerr: 21695c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley EVP_MD_CTX_cleanup(&mctx); 21795c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley return rv; 21895c29f3cd1f6c08c6c0927868683392eea727ccAdam Langley} 219