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/* $OpenBSD: ssl_smtpd.c,v 1.13 2015/12/30 16:02:08 benno Exp $ */ |
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/* |
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* Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org> |
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* Copyright (c) 2008 Reyk Floeter <reyk@openbsd.org> |
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* Copyright (c) 2012 Gilles Chehade <gilles@poolp.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/queue.h> |
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#include <sys/tree.h> |
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#include <sys/socket.h> |
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#include <sys/stat.h> |
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#include <ctype.h> |
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#include <event.h> |
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#include <fcntl.h> |
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#include <limits.h> |
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#include <imsg.h> |
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#include <pwd.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <openssl/ssl.h> |
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#include <openssl/engine.h> |
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#include <openssl/err.h> |
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#include "smtpd.h" |
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#include "log.h" |
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#include "ssl.h" |
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void * |
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ssl_mta_init(void *pkiname, char *cert, off_t cert_len, const char *ciphers) |
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{ |
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SSL_CTX *ctx = NULL; |
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SSL *ssl = NULL; |
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ctx = ssl_ctx_create(pkiname, cert, cert_len, ciphers); |
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if ((ssl = SSL_new(ctx)) == NULL) |
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goto err; |
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if (!SSL_set_ssl_method(ssl, SSLv23_client_method())) |
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goto err; |
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SSL_CTX_free(ctx); |
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return (void *)(ssl); |
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err: |
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SSL_free(ssl); |
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SSL_CTX_free(ctx); |
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ssl_error("ssl_mta_init"); |
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return (NULL); |
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} |
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/* dummy_verify */ |
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static int |
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dummy_verify(int ok, X509_STORE_CTX *store) |
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{ |
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/* |
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* We *want* SMTP to request an optional client certificate, however we don't want the |
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* verification to take place in the SMTP process. This dummy verify will allow us to |
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* asynchronously verify in the lookup process. |
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*/ |
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return 1; |
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} |
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void * |
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ssl_smtp_init(void *ssl_ctx, int verify) |
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{ |
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SSL *ssl = NULL; |
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log_debug("debug: session_start_ssl: switching to SSL"); |
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if (verify) |
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SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, dummy_verify); |
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if ((ssl = SSL_new(ssl_ctx)) == NULL) |
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goto err; |
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if (!SSL_set_ssl_method(ssl, SSLv23_server_method())) |
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goto err; |
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return (void *)(ssl); |
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err: |
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SSL_free(ssl); |
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ssl_error("ssl_smtp_init"); |
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return (NULL); |
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} |