1From 0c35749891bf834c1f3c1c4c330266bd2f4733cc Mon Sep 17 00:00:00 2001
2From: Khem Raj <raj.khem@gmail.com>
3Date: Sun, 9 Sep 2018 10:40:09 -0700
4Subject: [PATCH] Forward port to OpenSSL 1.1.x
5
6* import patch from debian
7https://sources.debian.org/src/wvstreams/4.6.1-14/debian/patches/wvstreams_openssl1.1.patch
8Author: Reiner Herrmann <reiner@reiner-h.de>
9
10Upstream-Status: Submitted [https://github.com/apenwarr/wvstreams/pull/2]
11Signed-off-by: Khem Raj <raj.khem@gmail.com>
12---
13 crypto/wvcrl.cc           | 38 +++++++++++++-------------------------
14 crypto/wvdiffiehellman.cc | 30 +++++++++++++++++++-----------
15 crypto/wvdigest.cc        | 16 ++++++++--------
16 crypto/wvocsp.cc          | 35 +++++++++--------------------------
17 crypto/wvx509.cc          | 31 ++++++++++++++++---------------
18 crypto/wvx509mgr.cc       | 27 ++++++++++++++++-----------
19 include/wvdiffiehellman.h |  2 +-
20 include/wvdigest.h        | 14 ++++++--------
21 include/wvtripledes.h     | 10 +++++-----
22 9 files changed, 93 insertions(+), 110 deletions(-)
23
24diff --git a/crypto/wvcrl.cc b/crypto/wvcrl.cc
25index fa00c76..880ad85 100644
26--- a/crypto/wvcrl.cc
27+++ b/crypto/wvcrl.cc
28@@ -357,31 +357,19 @@ bool WvCRL::isrevoked(WvStringParm serial_number) const
29 	ASN1_INTEGER *serial = serial_to_int(serial_number);
30 	if (serial)
31 	{
32-	    X509_REVOKED mayberevoked;
33-	    mayberevoked.serialNumber = serial;
34-	    if (crl->crl->revoked)
35-	    {
36-		int idx = sk_X509_REVOKED_find(crl->crl->revoked,
37-					       &mayberevoked);
38-		ASN1_INTEGER_free(serial);
39-		if (idx >= 0)
40-                {
41-                    debug("Certificate is revoked.\n");
42-		    return true;
43-                }
44-                else
45-                {
46-                    debug("Certificate is not revoked.\n");
47-		    return false;
48-                }
49-	    }
50-	    else
51-	    {
52-		ASN1_INTEGER_free(serial);
53-		debug("CRL does not have revoked list.\n");
54-                return false;
55-	    }
56-
57+	    X509_REVOKED *revoked_entry = NULL;
58+	    int idx = X509_CRL_get0_by_serial(crl, &revoked_entry, serial);
59+	    ASN1_INTEGER_free(serial);
60+	    if (idx >= 1 || revoked_entry)
61+            {
62+                debug("Certificate is revoked.\n");
63+	        return true;
64+            }
65+            else
66+            {
67+                debug("Certificate is not revoked.\n");
68+	        return false;
69+            }
70 	}
71 	else
72 	    debug(WvLog::Warning, "Can't convert serial number to ASN1 format. "
73diff --git a/crypto/wvdiffiehellman.cc b/crypto/wvdiffiehellman.cc
74index 7c0bf32..15cd104 100644
75--- a/crypto/wvdiffiehellman.cc
76+++ b/crypto/wvdiffiehellman.cc
77@@ -39,24 +39,25 @@ WvDiffieHellman::WvDiffieHellman(const unsigned char *_key, int _keylen,
78 {
79     int problems;
80     int check;
81-    {
82+
83 	info = DH_new();
84-	info->p = BN_bin2bn(_key, _keylen, NULL);
85+	BIGNUM *p = BN_bin2bn(_key, _keylen, NULL);
86 // 	info->p->top = 0;
87 // 	info->p->dmax = _keylen * 8 / BN_BITS2;
88 // 	info->p->neg = 0;
89 // 	info->p->flags = 0;
90
91-	info->g = BN_new();
92-	BN_set_word(info->g, generator);
93+	BIGNUM *g = BN_new();
94+	BN_set_word(g, generator);
95 // 	info->g->d = &generator;
96 //  	info->g->top = 0;
97 //  	info->g->dmax = 1;
98 //  	info->g->neg = 0;
99 //  	info->g->flags = 0;
100-    }
101
102-    check = BN_mod_word(info->p, 24);
103+	DH_set0_pqg(info, p, NULL, g);
104+
105+    check = BN_mod_word(p, 24);
106     DH_check(info, &problems);
107     if (problems & DH_CHECK_P_NOT_PRIME)
108  	log(WvLog::Error, "Using a composite number for authentication.\n");
109@@ -64,7 +65,7 @@ WvDiffieHellman::WvDiffieHellman(const unsigned char *_key, int _keylen,
110 	log(WvLog::Error,"Using an unsafe prime number for authentication.\n");
111     if (problems & DH_NOT_SUITABLE_GENERATOR)
112 	log(WvLog::Error, "Can you just use 2 instead of %s (%s)!!\n",
113-	    BN_bn2hex(info->g), check);
114+	    BN_bn2hex(g), check);
115     if (problems & DH_UNABLE_TO_CHECK_GENERATOR)
116 	log(WvLog::Notice, "Using a strange argument for diffie-hellman.\n");
117     DH_generate_key(info);
118@@ -72,18 +73,23 @@ WvDiffieHellman::WvDiffieHellman(const unsigned char *_key, int _keylen,
119
120 int WvDiffieHellman::pub_key_len()
121 {
122-    return BN_num_bytes(info->pub_key);
123+    const BIGNUM *pub_key = NULL;
124+	DH_get0_key(info, &pub_key, NULL);
125+    return BN_num_bytes(pub_key);
126 }
127
128 int WvDiffieHellman::get_public_value(WvBuf &outbuf, int len)
129 {
130-    int key_len = BN_num_bytes(info->pub_key);
131+	const BIGNUM *pub_key = NULL;
132+	DH_get0_key(info, &pub_key, NULL);
133+
134+    int key_len = BN_num_bytes(pub_key);
135     if (key_len < len)
136 	len = key_len;
137
138     // alloca is stack allocated, don't free it.
139     unsigned char *foo = (unsigned char*)alloca(key_len);
140-    BN_bn2bin(info->pub_key, foo);
141+    BN_bn2bin(pub_key, foo);
142     outbuf.put(foo, len);
143
144     return len;
145@@ -91,8 +97,10 @@ int WvDiffieHellman::get_public_value(WvBuf &outbuf, int len)
146
147 bool WvDiffieHellman::create_secret(WvBuf &inbuf, size_t in_len, WvBuf& outbuf)
148 {
149+   const BIGNUM *pub_key = NULL;
150+   DH_get0_key(info, &pub_key, NULL);
151     unsigned char *foo = (unsigned char *)alloca(DH_size(info));
152-   log("My public value\n%s\nYour public value\n%s\n",BN_bn2hex(info->pub_key),
153+   log("My public value\n%s\nYour public value\n%s\n",BN_bn2hex(pub_key),
154        hexdump_buffer(inbuf.peek(0, in_len), in_len, false));
155     int len = DH_compute_key (foo, BN_bin2bn(inbuf.get(in_len), in_len, NULL),
156 			      info);
157diff --git a/crypto/wvdigest.cc b/crypto/wvdigest.cc
158index 150edee..73ebb5d 100644
159--- a/crypto/wvdigest.cc
160+++ b/crypto/wvdigest.cc
161@@ -13,10 +13,10 @@
162
163 /***** WvEVPMDDigest *****/
164
165-WvEVPMDDigest::WvEVPMDDigest(const env_md_st *_evpmd) :
166+WvEVPMDDigest::WvEVPMDDigest(const EVP_MD*_evpmd) :
167     evpmd(_evpmd), active(false)
168 {
169-    evpctx = new EVP_MD_CTX;
170+    evpctx = EVP_MD_CTX_new();
171     _reset();
172 }
173
174@@ -24,7 +24,7 @@ WvEVPMDDigest::WvEVPMDDigest(const env_md_st *_evpmd) :
175 WvEVPMDDigest::~WvEVPMDDigest()
176 {
177     cleanup();
178-    delete evpctx;
179+    EVP_MD_CTX_free(evpctx);
180 }
181
182
183@@ -60,7 +60,7 @@ bool WvEVPMDDigest::_reset()
184     // the typecast is necessary for API compatibility with different
185     // versions of openssl.  None of them *actually* change the contents of
186     // the pointer.
187-    EVP_DigestInit(evpctx, (env_md_st *)evpmd);
188+    EVP_DigestInit(evpctx, evpmd);
189     active = true;
190     return true;
191 }
192@@ -79,7 +79,7 @@ void WvEVPMDDigest::cleanup()
193
194 size_t WvEVPMDDigest::digestsize() const
195 {
196-    return EVP_MD_size((env_md_st *)evpmd);
197+    return EVP_MD_size(evpmd);
198 }
199
200
201@@ -104,14 +104,14 @@ WvHMACDigest::WvHMACDigest(WvEVPMDDigest *_digest,
202 {
203     key = new unsigned char[keysize];
204     memcpy(key, _key, keysize);
205-    hmacctx = new HMAC_CTX;
206+    hmacctx = HMAC_CTX_new();
207     _reset();
208 }
209
210 WvHMACDigest::~WvHMACDigest()
211 {
212     cleanup();
213-    delete hmacctx;
214+    HMAC_CTX_free(hmacctx);
215     deletev key;
216     delete digest;
217 }
218@@ -145,7 +145,7 @@ bool WvHMACDigest::_finish(WvBuf &outbuf)
219 bool WvHMACDigest::_reset()
220 {
221     cleanup();
222-    HMAC_Init(hmacctx, key, keysize, (env_md_st *)digest->getevpmd());
223+    HMAC_Init(hmacctx, key, keysize, digest->getevpmd());
224     active = true;
225     return true;
226 }
227diff --git a/crypto/wvocsp.cc b/crypto/wvocsp.cc
228index ddb2de4..7d5da07 100644
229--- a/crypto/wvocsp.cc
230+++ b/crypto/wvocsp.cc
231@@ -118,9 +118,10 @@ bool WvOCSPResp::check_nonce(const WvOCSPReq &req) const
232
233 bool WvOCSPResp::signedbycert(const WvX509 &cert) const
234 {
235-    EVP_PKEY *skey = X509_get_pubkey(cert.cert);
236-    int i = OCSP_BASICRESP_verify(bs, skey, 0);
237-    EVP_PKEY_free(skey);
238+    STACK_OF(X509) *sk = sk_X509_new_null();
239+    sk_X509_push(sk, cert.cert);
240+    int i = OCSP_basic_verify(bs, sk, NULL, OCSP_NOVERIFY);
241+    sk_X509_free(sk);
242
243     if(i > 0)
244         return true;
245@@ -131,33 +132,15 @@ bool WvOCSPResp::signedbycert(const WvX509 &cert) const
246
247 WvX509 WvOCSPResp::get_signing_cert() const
248 {
249-    if (!bs || !sk_X509_num(bs->certs))
250+    const STACK_OF(X509) *certs = OCSP_resp_get0_certs(bs);
251+    if (!bs || !sk_X509_num(certs))
252         return WvX509();
253
254-    // note: the following bit of code is taken almost verbatim from
255-    // ocsp_vfy.c in OpenSSL 0.9.8. Copyright and attribution should
256-    // properly belong to them
257-
258-    OCSP_RESPID *id = bs->tbsResponseData->responderId;
259-
260-    if (id->type == V_OCSP_RESPID_NAME)
261-    {
262-        X509 *x = X509_find_by_subject(bs->certs, id->value.byName);
263-        if (x)
264-            return WvX509(X509_dup(x));
265+    X509 *signer = NULL;
266+    if (OCSP_resp_get0_signer(bs, &signer, NULL) == 1) {
267+        return WvX509(X509_dup(signer));
268     }
269
270-    if (id->value.byKey->length != SHA_DIGEST_LENGTH) return NULL;
271-    unsigned char tmphash[SHA_DIGEST_LENGTH];
272-    unsigned char *keyhash = id->value.byKey->data;
273-    for (int i = 0; i < sk_X509_num(bs->certs); i++)
274-    {
275-        X509 *x = sk_X509_value(bs->certs, i);
276-        X509_pubkey_digest(x, EVP_sha1(), tmphash, NULL);
277-        if(!memcmp(keyhash, tmphash, SHA_DIGEST_LENGTH))
278-            return WvX509(X509_dup(x));
279-    }
280-
281     return WvX509();
282 }
283
284diff --git a/crypto/wvx509.cc b/crypto/wvx509.cc
285index e4925ce..984156c 100644
286--- a/crypto/wvx509.cc
287+++ b/crypto/wvx509.cc
288@@ -974,7 +974,7 @@ static void add_aia(WvStringParm type, WvString identifier,
289     sk_ACCESS_DESCRIPTION_push(ainfo, acc);
290     acc->method = OBJ_txt2obj(type.cstr(), 0);
291     acc->location->type = GEN_URI;
292-    acc->location->d.ia5 = M_ASN1_IA5STRING_new();
293+    acc->location->d.ia5 = ASN1_IA5STRING_new();
294     unsigned char *cident
295 	= reinterpret_cast<unsigned char *>(identifier.edit());
296     ASN1_STRING_set(acc->location->d.ia5, cident, identifier.len());
297@@ -1059,7 +1059,7 @@ void WvX509::set_crl_urls(WvStringList &urls)
298         GENERAL_NAMES *uris = GENERAL_NAMES_new();
299         GENERAL_NAME *uri = GENERAL_NAME_new();
300         uri->type = GEN_URI;
301-        uri->d.ia5 = M_ASN1_IA5STRING_new();
302+        uri->d.ia5 = ASN1_IA5STRING_new();
303         unsigned char *cident
304 	    = reinterpret_cast<unsigned char *>(i().edit());
305         ASN1_STRING_set(uri->d.ia5, cident, i().len());
306@@ -1162,10 +1162,11 @@ WvString WvX509::get_extension(int nid) const
307 #else
308             X509V3_EXT_METHOD *method = X509V3_EXT_get(ext);
309 #endif
310+            ASN1_OCTET_STRING *ext_data_str = X509_EXTENSION_get_data(ext);
311             if (!method)
312             {
313                 WvDynBuf buf;
314-                buf.put(ext->value->data, ext->value->length);
315+                buf.put(ext_data_str->data, ext_data_str->length);
316                 retval = buf.getstr();
317             }
318             else
319@@ -1176,21 +1177,21 @@ WvString WvX509::get_extension(int nid) const
320                 // even though it's const (at least as of version 0.9.8e).
321                 // gah.
322 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
323-                const unsigned char * ext_value_data = ext->value->data;
324+                const unsigned char * ext_value_data = ext_data_str->data;
325 #else
326                 unsigned char *ext_value_data = ext->value->data;
327 #endif
328                 if (method->it)
329                 {
330                     ext_data = ASN1_item_d2i(NULL, &ext_value_data,
331-                                             ext->value->length,
332+                                             ext_data_str->length,
333                                              ASN1_ITEM_ptr(method->it));
334                     TRACE("Applied generic conversion!\n");
335                 }
336                 else
337                 {
338                     ext_data = method->d2i(NULL, &ext_value_data,
339-                                           ext->value->length);
340+                                           ext_data_str->length);
341                     TRACE("Applied method specific conversion!\n");
342                 }
343
344@@ -1325,13 +1326,13 @@ bool WvX509::verify(WvBuf &original, WvStringParm signature) const
345         return false;
346
347     /* Verify the signature */
348-    EVP_MD_CTX sig_ctx;
349-    EVP_VerifyInit(&sig_ctx, EVP_sha1());
350-    EVP_VerifyUpdate(&sig_ctx, original.peek(0, original.used()),
351+    EVP_MD_CTX *sig_ctx = EVP_MD_CTX_new();
352+    EVP_VerifyInit(sig_ctx, EVP_sha1());
353+    EVP_VerifyUpdate(sig_ctx, original.peek(0, original.used()),
354 		     original.used());
355-    int sig_err = EVP_VerifyFinal(&sig_ctx, sig_buf, sig_size, pk);
356+    int sig_err = EVP_VerifyFinal(sig_ctx, sig_buf, sig_size, pk);
357     EVP_PKEY_free(pk);
358-    EVP_MD_CTX_cleanup(&sig_ctx); // Again, not my fault...
359+    EVP_MD_CTX_free(sig_ctx); // Again, not my fault...
360     if (sig_err != 1)
361     {
362         debug("Verify failed!\n");
363@@ -1450,19 +1451,19 @@ void WvX509::set_ski()
364 {
365     CHECK_CERT_EXISTS_SET("ski");
366
367-    ASN1_OCTET_STRING *oct = M_ASN1_OCTET_STRING_new();
368-    ASN1_BIT_STRING *pk = cert->cert_info->key->public_key;
369+    ASN1_OCTET_STRING *oct = ASN1_OCTET_STRING_new();
370+    ASN1_BIT_STRING *pk = X509_get0_pubkey_bitstr(cert);
371     unsigned char pkey_dig[EVP_MAX_MD_SIZE];
372     unsigned int diglen;
373
374     EVP_Digest(pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL);
375
376-    M_ASN1_OCTET_STRING_set(oct, pkey_dig, diglen);
377+    ASN1_OCTET_STRING_set(oct, pkey_dig, diglen);
378     X509_EXTENSION *ext = X509V3_EXT_i2d(NID_subject_key_identifier, 0,
379 					oct);
380     X509_add_ext(cert, ext, -1);
381     X509_EXTENSION_free(ext);
382-    M_ASN1_OCTET_STRING_free(oct);
383+    ASN1_OCTET_STRING_free(oct);
384 }
385
386
387diff --git a/crypto/wvx509mgr.cc b/crypto/wvx509mgr.cc
388index f249eec..156d3a4 100644
389--- a/crypto/wvx509mgr.cc
390+++ b/crypto/wvx509mgr.cc
391@@ -350,6 +350,8 @@ bool WvX509Mgr::signcert(WvX509 &unsignedcert) const
392         return false;
393     }
394
395+    uint32_t ex_flags = X509_get_extension_flags(cert);
396+    uint32_t ex_kusage = X509_get_key_usage(cert);
397     if (cert == unsignedcert.cert)
398     {
399 	debug("Self Signing!\n");
400@@ -362,8 +364,8 @@ bool WvX509Mgr::signcert(WvX509 &unsignedcert) const
401         return false;
402     }
403 #endif
404-    else if (!((cert->ex_flags & EXFLAG_KUSAGE) &&
405-               (cert->ex_kusage & KU_KEY_CERT_SIGN)))
406+    else if (!((ex_flags & EXFLAG_KUSAGE) &&
407+               (ex_kusage & KU_KEY_CERT_SIGN)))
408     {
409 	debug("This Certificate is not allowed to sign certificates!\n");
410 	return false;
411@@ -390,6 +392,8 @@ bool WvX509Mgr::signcert(WvX509 &unsignedcert) const
412
413 bool WvX509Mgr::signcrl(WvCRL &crl) const
414 {
415+    uint32_t ex_flags = X509_get_extension_flags(cert);
416+    uint32_t ex_kusage = X509_get_key_usage(cert);
417     if (!isok() || !crl.isok())
418     {
419         debug(WvLog::Warning, "Asked to sign CRL, but certificate or CRL (or "
420@@ -403,12 +407,12 @@ bool WvX509Mgr::signcrl(WvCRL &crl) const
421               "CRLs!\n");
422         return false;
423     }
424-    else if (!((cert->ex_flags & EXFLAG_KUSAGE) &&
425-	  (cert->ex_kusage & KU_CRL_SIGN)))
426+    else if (!((ex_flags & EXFLAG_KUSAGE) &&
427+	  (ex_kusage & KU_CRL_SIGN)))
428     {
429 	debug("Certificate not allowed to sign CRLs! (%s %s)\n",
430-              (cert->ex_flags & EXFLAG_KUSAGE),
431-	      (cert->ex_kusage & KU_CRL_SIGN));
432+              (ex_flags & EXFLAG_KUSAGE),
433+	      (ex_kusage & KU_CRL_SIGN));
434 	return false;
435     }
436 #endif
437@@ -454,7 +458,6 @@ WvString WvX509Mgr::sign(WvBuf &data) const
438 {
439     assert(rsa);
440
441-    EVP_MD_CTX sig_ctx;
442     unsigned char sig_buf[4096];
443
444     EVP_PKEY *pk = EVP_PKEY_new();
445@@ -467,20 +470,22 @@ WvString WvX509Mgr::sign(WvBuf &data) const
446 	return WvString::null;
447     }
448
449-    EVP_SignInit(&sig_ctx, EVP_sha1());
450-    EVP_SignUpdate(&sig_ctx, data.peek(0, data.used()), data.used());
451+    EVP_MD_CTX *sig_ctx = EVP_MD_CTX_new();
452+    EVP_SignInit(sig_ctx, EVP_sha1());
453+    EVP_SignUpdate(sig_ctx, data.peek(0, data.used()), data.used());
454     unsigned int sig_len = sizeof(sig_buf);
455-    int sig_err = EVP_SignFinal(&sig_ctx, sig_buf,
456+    int sig_err = EVP_SignFinal(sig_ctx, sig_buf,
457 				&sig_len, pk);
458     if (sig_err != 1)
459     {
460 	debug("Error while signing.\n");
461 	EVP_PKEY_free(pk);
462+	EVP_MD_CTX_free(sig_ctx);
463 	return WvString::null;
464     }
465
466     EVP_PKEY_free(pk);
467-    EVP_MD_CTX_cleanup(&sig_ctx); // this isn't my fault ://
468+    EVP_MD_CTX_free(sig_ctx); // this isn't my fault ://
469     WvDynBuf buf;
470     buf.put(sig_buf, sig_len);
471     debug("Signature size: %s\n", buf.used());
472diff --git a/include/wvdiffiehellman.h b/include/wvdiffiehellman.h
473index af75ffa..a2d001f 100644
474--- a/include/wvdiffiehellman.h
475+++ b/include/wvdiffiehellman.h
476@@ -27,7 +27,7 @@ public:
477     bool create_secret(WvBuf &inbuf, size_t in_len, WvBuf& outbuf);
478
479 protected:
480-    struct dh_st *info;
481+    DH *info;
482     BN_ULONG generator;
483
484 private:
485diff --git a/include/wvdigest.h b/include/wvdigest.h
486index fdc39bd..f2eed40 100644
487--- a/include/wvdigest.h
488+++ b/include/wvdigest.h
489@@ -9,10 +9,8 @@
490
491 #include "wvencoder.h"
492 #include <stdint.h>
493+#include <openssl/evp.h>
494
495-struct env_md_st;
496-struct env_md_ctx_st;
497-struct hmac_ctx_st;
498
499 /**
500  * Superclass for all message digests.
501@@ -45,8 +43,8 @@ public:
502 class WvEVPMDDigest : public WvDigest
503 {
504     friend class WvHMACDigest;
505-    const env_md_st *evpmd;
506-    env_md_ctx_st *evpctx;
507+    const EVP_MD *evpmd;
508+    EVP_MD_CTX *evpctx;
509     bool active;
510
511 public:
512@@ -54,13 +52,13 @@ public:
513     virtual size_t digestsize() const;
514
515 protected:
516-    WvEVPMDDigest(const env_md_st *_evpmd);
517+    WvEVPMDDigest(const EVP_MD *_evpmd);
518     virtual bool _encode(WvBuf &inbuf, WvBuf &outbuf,
519         bool flush); // consumes input
520     virtual bool _finish(WvBuf &outbuf); // outputs digest
521     virtual bool _reset(); // supported: resets digest value
522
523-    const env_md_st *getevpmd()
524+    const EVP_MD *getevpmd()
525         { return evpmd; }
526
527 private:
528@@ -104,7 +102,7 @@ class WvHMACDigest : public WvDigest
529     WvEVPMDDigest *digest;
530     unsigned char *key;
531     size_t keysize;
532-    hmac_ctx_st *hmacctx;
533+    HMAC_CTX *hmacctx;
534     bool active;
535
536 public:
537diff --git a/include/wvtripledes.h b/include/wvtripledes.h
538index 185fe8a..a442e7a 100644
539--- a/include/wvtripledes.h
540+++ b/include/wvtripledes.h
541@@ -70,11 +70,11 @@ protected:
542
543 private:
544     Mode mode;
545-    des_cblock key;
546-    des_key_schedule deskey1;
547-    des_key_schedule deskey2;
548-    des_key_schedule deskey3;
549-    des_cblock ivec; // initialization vector
550+    DES_cblock key;
551+    DES_key_schedule deskey1;
552+    DES_key_schedule deskey2;
553+    DES_key_schedule deskey3;
554+    DES_cblock ivec; // initialization vector
555     int ivecoff; // current offset into initvec
556 };
557
558