From cb8a81da928054c2e8174d671f2abc88f4f35b87 Mon Sep 17 00:00:00 2001
From: Stefan Strogin <steils@gentoo.org>
Date: Mon, 10 Jun 2019 17:07:06 +0300
Subject: [PATCH] Fix LibreSSL support

---
 crypto/wvocsp.cc    | 34 ++++++++++++++++++++++++++++++++++
 crypto/wvx509mgr.cc | 14 ++++++++++++++
 include/wvdigest.h  |  1 +
 3 files changed, 49 insertions(+)

diff --git a/crypto/wvocsp.cc b/crypto/wvocsp.cc
index 7d5da072..7a157f90 100644
--- a/crypto/wvocsp.cc
+++ b/crypto/wvocsp.cc
@@ -130,6 +130,7 @@ bool WvOCSPResp::signedbycert(const WvX509 &cert) const
 }
 
 
+#ifndef LIBRESSL_VERSION_NUMBER
 WvX509 WvOCSPResp::get_signing_cert() const
 {
     const STACK_OF(X509) *certs = OCSP_resp_get0_certs(bs);
@@ -143,6 +144,39 @@ WvX509 WvOCSPResp::get_signing_cert() const
 
     return WvX509();
 }
+#else
+WvX509 WvOCSPResp::get_signing_cert() const
+{
+    if (!bs || !sk_X509_num(bs->certs))
+        return WvX509();
+
+    // note: the following bit of code is taken almost verbatim from
+    // ocsp_vfy.c in OpenSSL 0.9.8. Copyright and attribution should
+    // properly belong to them
+
+    OCSP_RESPID *id = bs->tbsResponseData->responderId;
+
+    if (id->type == V_OCSP_RESPID_NAME)
+    {
+        X509 *x = X509_find_by_subject(bs->certs, id->value.byName);
+        if (x)
+            return WvX509(X509_dup(x));
+    }
+
+    if (id->value.byKey->length != SHA_DIGEST_LENGTH) return NULL;
+    unsigned char tmphash[SHA_DIGEST_LENGTH];
+    unsigned char *keyhash = id->value.byKey->data;
+    for (int i = 0; i < sk_X509_num(bs->certs); i++)
+    {
+        X509 *x = sk_X509_value(bs->certs, i);
+        X509_pubkey_digest(x, EVP_sha1(), tmphash, NULL);
+        if(!memcmp(keyhash, tmphash, SHA_DIGEST_LENGTH))
+            return WvX509(X509_dup(x));
+    }
+
+    return WvX509();
+}
+#endif /* LIBRESSL_VERSION_NUMBER */
 
 
 WvOCSPResp::Status WvOCSPResp::get_status(const WvX509 &cert, 
diff --git a/crypto/wvx509mgr.cc b/crypto/wvx509mgr.cc
index 156d3a49..e2bb3ffe 100644
--- a/crypto/wvx509mgr.cc
+++ b/crypto/wvx509mgr.cc
@@ -350,8 +350,15 @@ bool WvX509Mgr::signcert(WvX509 &unsignedcert) const
         return false;
     }
 
+#ifndef LIBRESSL_VERSION_NUMBER
     uint32_t ex_flags = X509_get_extension_flags(cert);
     uint32_t ex_kusage = X509_get_key_usage(cert);
+#else
+    X509_check_purpose(cert, -1, -1);
+    uint32_t ex_flags = cert->ex_flags;
+    uint32_t ex_kusage = (cert->ex_flags & EXFLAG_KUSAGE) ?
+                         cert->ex_kusage : UINT32_MAX;
+#endif
     if (cert == unsignedcert.cert)
     {
 	debug("Self Signing!\n");
@@ -392,8 +399,15 @@ bool WvX509Mgr::signcert(WvX509 &unsignedcert) const
 
 bool WvX509Mgr::signcrl(WvCRL &crl) const
 {
+#ifndef LIBRESSL_VERSION_NUMBER
     uint32_t ex_flags = X509_get_extension_flags(cert);
     uint32_t ex_kusage = X509_get_key_usage(cert);
+#else
+    X509_check_purpose(cert, -1, -1);
+    uint32_t ex_flags = cert->ex_flags;
+    uint32_t ex_kusage = (cert->ex_flags & EXFLAG_KUSAGE) ?
+                         cert->ex_kusage : UINT32_MAX;
+#endif
     if (!isok() || !crl.isok())
     {
         debug(WvLog::Warning, "Asked to sign CRL, but certificate or CRL (or "
diff --git a/include/wvdigest.h b/include/wvdigest.h
index f2eed401..e637fb49 100644
--- a/include/wvdigest.h
+++ b/include/wvdigest.h
@@ -10,6 +10,7 @@
 #include "wvencoder.h"
 #include <stdint.h>
 #include <openssl/evp.h>
+#include <openssl/hmac.h>
 
 
 /**
-- 
2.21.0