GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/pem/pem_seal.c Lines: 0 68 0.0 %
Date: 2017-11-13 Branches: 0 26 0.0 %

Line Branch Exec Source
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/* $OpenBSD: pem_seal.c,v 1.24 2017/01/29 17:49:23 beck Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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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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 * 1. Redistributions of source code must retain the copyright
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 *    notice, this list of conditions and the following disclaimer.
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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 the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
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 * [including the GNU Public Licence.]
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 */
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#include <stdio.h>
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#include <string.h>
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#include <openssl/opensslconf.h>	/* for OPENSSL_NO_RSA */
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#ifndef OPENSSL_NO_RSA
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/pem.h>
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#include <openssl/rsa.h>
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#include <openssl/x509.h>
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static void
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PEM_ENCODE_SEAL_CTX_cleanup(PEM_ENCODE_SEAL_CTX *ctx)
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{
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	EVP_CIPHER_CTX_cleanup(&ctx->cipher);
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	EVP_MD_CTX_cleanup(&ctx->md);
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	explicit_bzero(&ctx->encode, sizeof(ctx->encode));
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}
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int
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PEM_SealInit(PEM_ENCODE_SEAL_CTX *ctx, EVP_CIPHER *type, EVP_MD *md_type,
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    unsigned char **ek, int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk)
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{
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	unsigned char key[EVP_MAX_KEY_LENGTH];
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	int ret = -1;
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	int i, j, max = 0;
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	char *s = NULL;
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	/*
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	 * Make sure ctx is properly initialized so that we can always pass
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	 * it to PEM_ENCODE_SEAL_CTX_cleanup() in the error path.
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	 */
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	EVP_EncodeInit(&ctx->encode);
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	EVP_MD_CTX_init(&ctx->md);
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	EVP_CIPHER_CTX_init(&ctx->cipher);
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	for (i = 0; i < npubk; i++) {
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		if (pubk[i]->type != EVP_PKEY_RSA) {
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			PEMerror(PEM_R_PUBLIC_KEY_NO_RSA);
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			goto err;
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		}
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		j = RSA_size(pubk[i]->pkey.rsa);
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		if (j > max)
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			max = j;
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	}
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	s = reallocarray(NULL, max, 2);
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	if (s == NULL) {
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		PEMerror(ERR_R_MALLOC_FAILURE);
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		goto err;
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	}
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	if (!EVP_SignInit(&ctx->md, md_type))
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		goto err;
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	ret = EVP_SealInit(&ctx->cipher, type, ek, ekl, iv, pubk, npubk);
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	if (ret <= 0)
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		goto err;
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	/* base64 encode the keys */
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	for (i = 0; i < npubk; i++) {
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		j = EVP_EncodeBlock((unsigned char *)s, ek[i],
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		    RSA_size(pubk[i]->pkey.rsa));
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		ekl[i] = j;
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		memcpy(ek[i], s, j + 1);
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	}
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	ret = npubk;
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	if (0) {
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err:
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		PEM_ENCODE_SEAL_CTX_cleanup(ctx);
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	}
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	free(s);
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	explicit_bzero(key, sizeof(key));
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	return (ret);
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}
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void
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PEM_SealUpdate(PEM_ENCODE_SEAL_CTX *ctx, unsigned char *out, int *outl,
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    unsigned char *in, int inl)
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{
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	unsigned char buffer[1600];
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	int i, j;
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	*outl = 0;
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	EVP_SignUpdate(&ctx->md, in, inl);
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	for (;;) {
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		if (inl <= 0)
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			break;
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		if (inl > 1200)
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			i = 1200;
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		else
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			i = inl;
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		EVP_EncryptUpdate(&ctx->cipher, buffer, &j, in, i);
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		EVP_EncodeUpdate(&ctx->encode, out, &j, buffer, j);
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		*outl += j;
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		out += j;
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		in += i;
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		inl -= i;
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	}
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}
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int
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PEM_SealFinal(PEM_ENCODE_SEAL_CTX *ctx, unsigned char *sig, int *sigl,
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    unsigned char *out, int *outl, EVP_PKEY *priv)
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{
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	unsigned char *s = NULL;
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	int ret = 0, j;
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	unsigned int i;
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	if (priv->type != EVP_PKEY_RSA) {
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		PEMerror(PEM_R_PUBLIC_KEY_NO_RSA);
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		goto err;
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	}
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	i = RSA_size(priv->pkey.rsa);
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	if (i < 100)
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		i = 100;
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	s = reallocarray(NULL, i, 2);
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	if (s == NULL) {
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		PEMerror(ERR_R_MALLOC_FAILURE);
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		goto err;
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	}
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	if (!EVP_EncryptFinal_ex(&ctx->cipher, s, (int *)&i))
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		goto err;
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	EVP_EncodeUpdate(&ctx->encode, out, &j, s, i);
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	*outl = j;
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	out += j;
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	EVP_EncodeFinal(&ctx->encode, out, &j);
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	*outl += j;
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	if (!EVP_SignFinal(&ctx->md, s, &i, priv))
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		goto err;
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	*sigl = EVP_EncodeBlock(sig, s, i);
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	ret = 1;
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err:
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	PEM_ENCODE_SEAL_CTX_cleanup(ctx);
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	free(s);
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	return (ret);
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}
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#endif