create project

print-esp.c

@@ -0,0 +1,744 @@
+/*	$NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp $	*/
+
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <netdissect-stdinc.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+/* Any code in this file that depends on HAVE_LIBCRYPTO depends on
+ * HAVE_OPENSSL_EVP_H too. Undefining the former when the latter isn't defined
+ * is the simplest way of handling the dependency.
+ */
+#ifdef HAVE_LIBCRYPTO
+#ifdef HAVE_OPENSSL_EVP_H
+#include <openssl/evp.h>
+#else
+#undef HAVE_LIBCRYPTO
+#endif
+#endif
+
+#include "netdissect.h"
+#include "strtoaddr.h"
+#include "extract.h"
+
+#include "ascii_strcasecmp.h"
+
+#include "ip.h"
+#include "ip6.h"
+
+/*
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE 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. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS 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 PROJECT OR 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.
+ */
+
+/*
+ * RFC1827/2406 Encapsulated Security Payload.
+ */
+
+struct newesp {
+	uint32_t	esp_spi;	/* ESP */
+	uint32_t	esp_seq;	/* Sequence number */
+	/*variable size*/		/* (IV and) Payload data */
+	/*variable size*/		/* padding */
+	/*8bit*/			/* pad size */
+	/*8bit*/			/* next header */
+	/*8bit*/			/* next header */
+	/*variable size, 32bit bound*/	/* Authentication data */
+};
+
+#ifdef HAVE_LIBCRYPTO
+union inaddr_u {
+	struct in_addr in4;
+	struct in6_addr in6;
+};
+struct sa_list {
+	struct sa_list	*next;
+	u_int		daddr_version;
+	union inaddr_u	daddr;
+	uint32_t	spi;          /* if == 0, then IKEv2 */
+	int             initiator;
+	u_char          spii[8];      /* for IKEv2 */
+	u_char          spir[8];
+	const EVP_CIPHER *evp;
+	int		ivlen;
+	int		authlen;
+	u_char          authsecret[256];
+	int             authsecret_len;
+	u_char		secret[256];  /* is that big enough for all secrets? */
+	int		secretlen;
+};
+
+#ifndef HAVE_EVP_CIPHER_CTX_NEW
+/*
+ * Allocate an EVP_CIPHER_CTX.
+ * Used if we have an older version of OpenSSL that doesn't provide
+ * routines to allocate and free them.
+ */
+static EVP_CIPHER_CTX *
+EVP_CIPHER_CTX_new(void)
+{
+	EVP_CIPHER_CTX *ctx;
+
+	ctx = malloc(sizeof(*ctx));
+	if (ctx == NULL)
+		return (NULL);
+	memset(ctx, 0, sizeof(*ctx));
+	return (ctx);
+}
+
+static void
+EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
+{
+	EVP_CIPHER_CTX_cleanup(ctx);
+	free(ctx);
+}
+#endif
+
+/*
+ * this will adjust ndo_packetp and ndo_snapend to new buffer!
+ */
+USES_APPLE_DEPRECATED_API
+int esp_print_decrypt_buffer_by_ikev2(netdissect_options *ndo,
+				      int initiator,
+				      u_char spii[8], u_char spir[8],
+				      const u_char *buf, const u_char *end)
+{
+	struct sa_list *sa;
+	const u_char *iv;
+	int len;
+	EVP_CIPHER_CTX *ctx;
+
+	/* initiator arg is any non-zero value */
+	if(initiator) initiator=1;
+
+	/* see if we can find the SA, and if so, decode it */
+	for (sa = ndo->ndo_sa_list_head; sa != NULL; sa = sa->next) {
+		if (sa->spi == 0
+		    && initiator == sa->initiator
+		    && memcmp(spii, sa->spii, 8) == 0
+		    && memcmp(spir, sa->spir, 8) == 0)
+			break;
+	}
+
+	if(sa == NULL) return 0;
+	if(sa->evp == NULL) return 0;
+
+	/*
+	 * remove authenticator, and see if we still have something to
+	 * work with
+	 */
+	end = end - sa->authlen;
+	iv  = buf;
+	buf = buf + sa->ivlen;
+	len = end-buf;
+
+	if(end <= buf) return 0;
+
+	ctx = EVP_CIPHER_CTX_new();
+	if (ctx == NULL)
+		return 0;
+	if (EVP_CipherInit(ctx, sa->evp, sa->secret, NULL, 0) < 0)
+		(*ndo->ndo_warning)(ndo, "espkey init failed");
+	EVP_CipherInit(ctx, NULL, NULL, iv, 0);
+	EVP_Cipher(ctx, buf, buf, len);
+	EVP_CIPHER_CTX_free(ctx);
+
+	ndo->ndo_packetp = buf;
+	ndo->ndo_snapend = end;
+
+	return 1;
+
+}
+USES_APPLE_RST
+
+static void esp_print_addsa(netdissect_options *ndo,
+			    struct sa_list *sa, int sa_def)
+{
+	/* copy the "sa" */
+
+	struct sa_list *nsa;
+
+	nsa = (struct sa_list *)malloc(sizeof(struct sa_list));
+	if (nsa == NULL)
+		(*ndo->ndo_error)(ndo, "ran out of memory to allocate sa structure");
+
+	*nsa = *sa;
+
+	if (sa_def)
+		ndo->ndo_sa_default = nsa;
+
+	nsa->next = ndo->ndo_sa_list_head;
+	ndo->ndo_sa_list_head = nsa;
+}
+
+
+static u_int hexdigit(netdissect_options *ndo, char hex)
+{
+	if (hex >= '0' && hex <= '9')
+		return (hex - '0');
+	else if (hex >= 'A' && hex <= 'F')
+		return (hex - 'A' + 10);
+	else if (hex >= 'a' && hex <= 'f')
+		return (hex - 'a' + 10);
+	else {
+		(*ndo->ndo_error)(ndo, "invalid hex digit %c in espsecret\n", hex);
+		return 0;
+	}
+}
+
+static u_int hex2byte(netdissect_options *ndo, char *hexstring)
+{
+	u_int byte;
+
+	byte = (hexdigit(ndo, hexstring[0]) << 4) + hexdigit(ndo, hexstring[1]);
+	return byte;
+}
+
+/*
+ * returns size of binary, 0 on failure.
+ */
+static
+int espprint_decode_hex(netdissect_options *ndo,
+			u_char *binbuf, unsigned int binbuf_len,
+			char *hex)
+{
+	unsigned int len;
+	int i;
+
+	len = strlen(hex) / 2;
+
+	if (len > binbuf_len) {
+		(*ndo->ndo_warning)(ndo, "secret is too big: %d\n", len);
+		return 0;
+	}
+
+	i = 0;
+	while (hex[0] != '\0' && hex[1]!='\0') {
+		binbuf[i] = hex2byte(ndo, hex);
+		hex += 2;
+		i++;
+	}
+
+	return i;
+}
+
+/*
+ * decode the form:    SPINUM@IP <tab> ALGONAME:0xsecret
+ */
+
+USES_APPLE_DEPRECATED_API
+static int
+espprint_decode_encalgo(netdissect_options *ndo,
+			char *decode, struct sa_list *sa)
+{
+	size_t i;
+	const EVP_CIPHER *evp;
+	int authlen = 0;
+	char *colon, *p;
+
+	colon = strchr(decode, ':');
+	if (colon == NULL) {
+		(*ndo->ndo_warning)(ndo, "failed to decode espsecret: %s\n", decode);
+		return 0;
+	}
+	*colon = '\0';
+
+	if (strlen(decode) > strlen("-hmac96") &&
+	    !strcmp(decode + strlen(decode) - strlen("-hmac96"),
+		    "-hmac96")) {
+		p = strstr(decode, "-hmac96");
+		*p = '\0';
+		authlen = 12;
+	}
+	if (strlen(decode) > strlen("-cbc") &&
+	    !strcmp(decode + strlen(decode) - strlen("-cbc"), "-cbc")) {
+		p = strstr(decode, "-cbc");
+		*p = '\0';
+	}
+	evp = EVP_get_cipherbyname(decode);
+
+	if (!evp) {
+		(*ndo->ndo_warning)(ndo, "failed to find cipher algo %s\n", decode);
+		sa->evp = NULL;
+		sa->authlen = 0;
+		sa->ivlen = 0;
+		return 0;
+	}
+
+	sa->evp = evp;
+	sa->authlen = authlen;
+	sa->ivlen = EVP_CIPHER_iv_length(evp);
+
+	colon++;
+	if (colon[0] == '0' && colon[1] == 'x') {
+		/* decode some hex! */
+
+		colon += 2;
+		sa->secretlen = espprint_decode_hex(ndo, sa->secret, sizeof(sa->secret), colon);
+		if(sa->secretlen == 0) return 0;
+	} else {
+		i = strlen(colon);
+
+		if (i < sizeof(sa->secret)) {
+			memcpy(sa->secret, colon, i);
+			sa->secretlen = i;
+		} else {
+			memcpy(sa->secret, colon, sizeof(sa->secret));
+			sa->secretlen = sizeof(sa->secret);
+		}
+	}
+
+	return 1;
+}
+USES_APPLE_RST
+
+/*
+ * for the moment, ignore the auth algorith, just hard code the authenticator
+ * length. Need to research how openssl looks up HMAC stuff.
+ */
+static int
+espprint_decode_authalgo(netdissect_options *ndo,
+			 char *decode, struct sa_list *sa)
+{
+	char *colon;
+
+	colon = strchr(decode, ':');
+	if (colon == NULL) {
+		(*ndo->ndo_warning)(ndo, "failed to decode espsecret: %s\n", decode);
+		return 0;
+	}
+	*colon = '\0';
+
+	if(ascii_strcasecmp(colon,"sha1") == 0 ||
+	   ascii_strcasecmp(colon,"md5") == 0) {
+		sa->authlen = 12;
+	}
+	return 1;
+}
+
+static void esp_print_decode_ikeline(netdissect_options *ndo, char *line,
+				     const char *file, int lineno)
+{
+	/* it's an IKEv2 secret, store it instead */
+	struct sa_list sa1;
+
+	char *init;
+	char *icookie, *rcookie;
+	int   ilen, rlen;
+	char *authkey;
+	char *enckey;
+
+	init = strsep(&line, " \t");
+	icookie = strsep(&line, " \t");
+	rcookie = strsep(&line, " \t");
+	authkey = strsep(&line, " \t");
+	enckey  = strsep(&line, " \t");
+
+	/* if any fields are missing */
+	if(!init || !icookie || !rcookie || !authkey || !enckey) {
+		(*ndo->ndo_warning)(ndo, "print_esp: failed to find all fields for ikev2 at %s:%u",
+				    file, lineno);
+
+		return;
+	}
+
+	ilen = strlen(icookie);
+	rlen = strlen(rcookie);
+
+	if((init[0]!='I' && init[0]!='R')
+	   || icookie[0]!='0' || icookie[1]!='x'
+	   || rcookie[0]!='0' || rcookie[1]!='x'
+	   || ilen!=18
+	   || rlen!=18) {
+		(*ndo->ndo_warning)(ndo, "print_esp: line %s:%u improperly formatted.",
+				    file, lineno);
+
+		(*ndo->ndo_warning)(ndo, "init=%s icookie=%s(%u) rcookie=%s(%u)",
+				    init, icookie, ilen, rcookie, rlen);
+
+		return;
+	}
+
+	sa1.spi = 0;
+	sa1.initiator = (init[0] == 'I');
+	if(espprint_decode_hex(ndo, sa1.spii, sizeof(sa1.spii), icookie+2)!=8)
+		return;
+
+	if(espprint_decode_hex(ndo, sa1.spir, sizeof(sa1.spir), rcookie+2)!=8)
+		return;
+
+	if(!espprint_decode_encalgo(ndo, enckey, &sa1)) return;
+
+	if(!espprint_decode_authalgo(ndo, authkey, &sa1)) return;
+
+	esp_print_addsa(ndo, &sa1, FALSE);
+}
+
+/*
+ *
+ * special form: file /name
+ * causes us to go read from this file instead.
+ *
+ */
+static void esp_print_decode_onesecret(netdissect_options *ndo, char *line,
+				       const char *file, int lineno)
+{
+	struct sa_list sa1;
+	int sa_def;
+
+	char *spikey;
+	char *decode;
+
+	spikey = strsep(&line, " \t");
+	sa_def = 0;
+	memset(&sa1, 0, sizeof(struct sa_list));
+
+	/* if there is only one token, then it is an algo:key token */
+	if (line == NULL) {
+		decode = spikey;
+		spikey = NULL;
+		/* sa1.daddr.version = 0; */
+		/* memset(&sa1.daddr, 0, sizeof(sa1.daddr)); */
+		/* sa1.spi = 0; */
+		sa_def    = 1;
+	} else
+		decode = line;
+
+	if (spikey && ascii_strcasecmp(spikey, "file") == 0) {
+		/* open file and read it */
+		FILE *secretfile;
+		char  fileline[1024];
+		int   subfile_lineno=0;
+		char  *nl;
+		char *filename = line;
+
+		secretfile = fopen(filename, FOPEN_READ_TXT);
+		if (secretfile == NULL) {
+			perror(filename);
+			exit(3);
+		}
+
+		while (fgets(fileline, sizeof(fileline)-1, secretfile) != NULL) {
+			subfile_lineno++;
+			/* remove newline from the line */
+			nl = strchr(fileline, '\n');
+			if (nl)
+				*nl = '\0';
+			if (fileline[0] == '#') continue;
+			if (fileline[0] == '\0') continue;
+
+			esp_print_decode_onesecret(ndo, fileline, filename, subfile_lineno);
+		}
+		fclose(secretfile);
+
+		return;
+	}
+
+	if (spikey && ascii_strcasecmp(spikey, "ikev2") == 0) {
+		esp_print_decode_ikeline(ndo, line, file, lineno);
+		return;
+	}
+
+	if (spikey) {
+
+		char *spistr, *foo;
+		uint32_t spino;
+
+		spistr = strsep(&spikey, "@");
+
+		spino = strtoul(spistr, &foo, 0);
+		if (spistr == foo || !spikey) {
+			(*ndo->ndo_warning)(ndo, "print_esp: failed to decode spi# %s\n", foo);
+			return;
+		}
+
+		sa1.spi = spino;
+
+		if (strtoaddr6(spikey, &sa1.daddr.in6) == 1) {
+			sa1.daddr_version = 6;
+		} else if (strtoaddr(spikey, &sa1.daddr.in4) == 1) {
+			sa1.daddr_version = 4;
+		} else {
+			(*ndo->ndo_warning)(ndo, "print_esp: can not decode IP# %s\n", spikey);
+			return;
+		}
+	}
+
+	if (decode) {
+		/* skip any blank spaces */
+		while (isspace((unsigned char)*decode))
+			decode++;
+
+		if(!espprint_decode_encalgo(ndo, decode, &sa1)) {
+			return;
+		}
+	}
+
+	esp_print_addsa(ndo, &sa1, sa_def);
+}
+
+USES_APPLE_DEPRECATED_API
+static void esp_init(netdissect_options *ndo _U_)
+{
+
+	OpenSSL_add_all_algorithms();
+	EVP_add_cipher_alias(SN_des_ede3_cbc, "3des");
+}
+USES_APPLE_RST
+
+void esp_print_decodesecret(netdissect_options *ndo)
+{
+	char *line;
+	char *p;
+	static int initialized = 0;
+
+	if (!initialized) {
+		esp_init(ndo);
+		initialized = 1;
+	}
+
+	p = ndo->ndo_espsecret;
+
+	while (p && p[0] != '\0') {
+		/* pick out the first line or first thing until a comma */
+		if ((line = strsep(&p, "\n,")) == NULL) {
+			line = p;
+			p = NULL;
+		}
+
+		esp_print_decode_onesecret(ndo, line, "cmdline", 0);
+	}
+
+	ndo->ndo_espsecret = NULL;
+}
+
+#endif
+
+#ifdef HAVE_LIBCRYPTO
+USES_APPLE_DEPRECATED_API
+#endif
+int
+esp_print(netdissect_options *ndo,
+	  const u_char *bp, const int length, const u_char *bp2
+#ifndef HAVE_LIBCRYPTO
+	_U_
+#endif
+	,
+	int *nhdr
+#ifndef HAVE_LIBCRYPTO
+	_U_
+#endif
+	,
+	int *padlen
+#ifndef HAVE_LIBCRYPTO
+	_U_
+#endif
+	)
+{
+	register const struct newesp *esp;
+	register const u_char *ep;
+#ifdef HAVE_LIBCRYPTO
+	const struct ip *ip;
+	struct sa_list *sa = NULL;
+	const struct ip6_hdr *ip6 = NULL;
+	int advance;
+	int len;
+	u_char *secret;
+	int ivlen = 0;
+	const u_char *ivoff;
+	const u_char *p;
+	EVP_CIPHER_CTX *ctx;
+#endif
+
+	esp = (const struct newesp *)bp;
+
+#ifdef HAVE_LIBCRYPTO
+	secret = NULL;
+	advance = 0;
+#endif
+
+#if 0
+	/* keep secret out of a register */
+	p = (u_char *)&secret;
+#endif
+
+	/* 'ep' points to the end of available data. */
+	ep = ndo->ndo_snapend;
+
+	if ((const u_char *)(esp + 1) >= ep) {
+		ND_PRINT((ndo, "[|ESP]"));
+		goto fail;
+	}
+	ND_PRINT((ndo, "ESP(spi=0x%08x", EXTRACT_32BITS(&esp->esp_spi)));
+	ND_PRINT((ndo, ",seq=0x%x)", EXTRACT_32BITS(&esp->esp_seq)));
+	ND_PRINT((ndo, ", length %u", length));
+
+#ifndef HAVE_LIBCRYPTO
+	goto fail;
+#else
+	/* initiailize SAs */
+	if (ndo->ndo_sa_list_head == NULL) {
+		if (!ndo->ndo_espsecret)
+			goto fail;
+
+		esp_print_decodesecret(ndo);
+	}
+
+	if (ndo->ndo_sa_list_head == NULL)
+		goto fail;
+
+	ip = (const struct ip *)bp2;
+	switch (IP_V(ip)) {
+	case 6:
+		ip6 = (const struct ip6_hdr *)bp2;
+		/* we do not attempt to decrypt jumbograms */
+		if (!EXTRACT_16BITS(&ip6->ip6_plen))
+			goto fail;
+		/* if we can't get nexthdr, we do not need to decrypt it */
+		len = sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen);
+
+		/* see if we can find the SA, and if so, decode it */
+		for (sa = ndo->ndo_sa_list_head; sa != NULL; sa = sa->next) {
+			if (sa->spi == EXTRACT_32BITS(&esp->esp_spi) &&
+			    sa->daddr_version == 6 &&
+			    UNALIGNED_MEMCMP(&sa->daddr.in6, &ip6->ip6_dst,
+				   sizeof(struct in6_addr)) == 0) {
+				break;
+			}
+		}
+		break;
+	case 4:
+		/* nexthdr & padding are in the last fragment */
+		if (EXTRACT_16BITS(&ip->ip_off) & IP_MF)
+			goto fail;
+		len = EXTRACT_16BITS(&ip->ip_len);
+
+		/* see if we can find the SA, and if so, decode it */
+		for (sa = ndo->ndo_sa_list_head; sa != NULL; sa = sa->next) {
+			if (sa->spi == EXTRACT_32BITS(&esp->esp_spi) &&
+			    sa->daddr_version == 4 &&
+			    UNALIGNED_MEMCMP(&sa->daddr.in4, &ip->ip_dst,
+				   sizeof(struct in_addr)) == 0) {
+				break;
+			}
+		}
+		break;
+	default:
+		goto fail;
+	}
+
+	/* if we didn't find the specific one, then look for
+	 * an unspecified one.
+	 */
+	if (sa == NULL)
+		sa = ndo->ndo_sa_default;
+
+	/* if not found fail */
+	if (sa == NULL)
+		goto fail;
+
+	/* if we can't get nexthdr, we do not need to decrypt it */
+	if (ep - bp2 < len)
+		goto fail;
+	if (ep - bp2 > len) {
+		/* FCS included at end of frame (NetBSD 1.6 or later) */
+		ep = bp2 + len;
+	}
+
+	ivoff = (const u_char *)(esp + 1) + 0;
+	ivlen = sa->ivlen;
+	secret = sa->secret;
+	ep = ep - sa->authlen;
+
+	if (sa->evp) {
+		ctx = EVP_CIPHER_CTX_new();
+		if (ctx != NULL) {
+			if (EVP_CipherInit(ctx, sa->evp, secret, NULL, 0) < 0)
+				(*ndo->ndo_warning)(ndo, "espkey init failed");
+
+			p = ivoff;
+			EVP_CipherInit(ctx, NULL, NULL, p, 0);
+			EVP_Cipher(ctx, p + ivlen, p + ivlen, ep - (p + ivlen));
+			EVP_CIPHER_CTX_free(ctx);
+			advance = ivoff - (const u_char *)esp + ivlen;
+		} else
+			advance = sizeof(struct newesp);
+	} else
+		advance = sizeof(struct newesp);
+
+	/* sanity check for pad length */
+	if (ep - bp < *(ep - 2))
+		goto fail;
+
+	if (padlen)
+		*padlen = *(ep - 2) + 2;
+
+	if (nhdr)
+		*nhdr = *(ep - 1);
+
+	ND_PRINT((ndo, ": "));
+	return advance;
+#endif
+
+fail:
+	return -1;
+}
+#ifdef HAVE_LIBCRYPTO
+USES_APPLE_RST
+#endif
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */