https://github.com/apache/httpd/pull/258

--- httpd-2.4.51/modules/ssl/ssl_engine_init.c.openssl3

+++ httpd-2.4.51/modules/ssl/ssl_engine_init.c

@@ -91,7 +91,6 @@

     return 1;

 }

-#endif

 /*

  * Grab well-defined DH parameters from OpenSSL, see the BN_get_rfc*

@@ -171,6 +170,7 @@

     return NULL; /* impossible to reach. */

 }

+#endif

 static void ssl_add_version_components(apr_pool_t *ptemp, apr_pool_t *pconf,

                                        server_rec *s)

@@ -440,8 +440,9 @@

     modssl_init_app_data2_idx(); /* for modssl_get_app_data2() at request time */

+#if MODSSL_USE_OPENSSL_PRE_1_1_API

     init_dh_params();

-#if !MODSSL_USE_OPENSSL_PRE_1_1_API

+#else

     init_bio_methods();

 #endif

@@ -862,7 +863,11 @@

 {

     SSL_CTX *ctx = mctx->ssl_ctx;

+#if MODSSL_USE_OPENSSL_PRE_1_1_API

+    /* Note that for OpenSSL>=1.1, auto selection is enabled via

+     * SSL_CTX_set_dh_auto(,1) if no parameter is configured. */

     SSL_CTX_set_tmp_dh_callback(ctx,  ssl_callback_TmpDH);

+#endif

     SSL_CTX_set_info_callback(ctx, ssl_callback_Info);

@@ -871,6 +876,23 @@

 #endif

 }

+static APR_INLINE

+int modssl_CTX_load_verify_locations(SSL_CTX *ctx,

+                                     const char *file,

+                                     const char *path)

+{

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+    if (!SSL_CTX_load_verify_locations(ctx, file, path))

+        return 0;

+#else

+    if (file && !SSL_CTX_load_verify_file(ctx, file))

+        return 0;

+    if (path && !SSL_CTX_load_verify_dir(ctx, path))

+        return 0;

+#endif

+    return 1;

+}

+

 static apr_status_t ssl_init_ctx_verify(server_rec *s,

                                         apr_pool_t *p,

                                         apr_pool_t *ptemp,

@@ -911,10 +933,8 @@

         ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s,

                      "Configuring client authentication");

-        if (!SSL_CTX_load_verify_locations(ctx,

-                                           mctx->auth.ca_cert_file,

-                                           mctx->auth.ca_cert_path))

-        {

+        if (!modssl_CTX_load_verify_locations(ctx, mctx->auth.ca_cert_file,

+                                                   mctx->auth.ca_cert_path)) {

             ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01895)

                     "Unable to configure verify locations "

                     "for client authentication");

@@ -999,6 +1019,23 @@

     return APR_SUCCESS;

 }

+static APR_INLINE

+int modssl_X509_STORE_load_locations(X509_STORE *store,

+                                     const char *file,

+                                     const char *path)

+{

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+    if (!X509_STORE_load_locations(store, file, path))

+        return 0;

+#else

+    if (file && !X509_STORE_load_file(store, file))

+        return 0;

+    if (path && !X509_STORE_load_path(store, path))

+        return 0;

+#endif

+    return 1;

+}

+

 static apr_status_t ssl_init_ctx_crl(server_rec *s,

                                      apr_pool_t *p,

                                      apr_pool_t *ptemp,

@@ -1037,8 +1074,8 @@

     ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01900)

                  "Configuring certificate revocation facility");

-    if (!store || !X509_STORE_load_locations(store, mctx->crl_file,

-                                             mctx->crl_path)) {

+    if (!store || !modssl_X509_STORE_load_locations(store, mctx->crl_file,

+                                                           mctx->crl_path)) {

         ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01901)

                      "Host %s: unable to configure X.509 CRL storage "

                      "for certificate revocation", mctx->sc->vhost_id);

@@ -1267,6 +1304,31 @@

    return 0;

 }

+static APR_INLINE int modssl_DH_bits(DH *dh)

+{

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+    return DH_bits(dh);

+#else

+    return BN_num_bits(DH_get0_p(dh));

+#endif

+}

+

+/* SSL_CTX_use_PrivateKey_file() can fail either because the private

+ * key was encrypted, or due to a mismatch between an already-loaded

+ * cert and the key - a common misconfiguration - from calling

+ * X509_check_private_key().  This macro is passed the last error code

+ * off the OpenSSL stack and evaluates to true only for the first

+ * case.  With OpenSSL < 3 the second case is identifiable by the

+ * function code, but function codes are not used from 3.0. */

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+#define CHECK_PRIVKEY_ERROR(ec) (ERR_GET_FUNC(ec) != X509_F_X509_CHECK_PRIVATE_KEY)

+#else

+#define CHECK_PRIVKEY_ERROR(ec) (ERR_GET_LIB != ERR_LIB_X509            \

+                                 || (ERR_GET_REASON(ec) != X509_R_KEY_TYPE_MISMATCH \

+                                     && ERR_GET_REASON(ec) != X509_R_KEY_VALUES_MISMATCH \

+                                     && ERR_GET_REASON(ec) != X509_R_UNKNOWN_KEY_TYPE))

+#endif

+

 static apr_status_t ssl_init_server_certs(server_rec *s,

                                           apr_pool_t *p,

                                           apr_pool_t *ptemp,

@@ -1277,7 +1339,7 @@

     const char *vhost_id = mctx->sc->vhost_id, *key_id, *certfile, *keyfile;

     int i;

     X509 *cert;

-    DH *dhparams;

+    DH *dh;

 #ifdef HAVE_ECC

     EC_GROUP *ecparams = NULL;

     int nid;

@@ -1372,8 +1434,7 @@

         }

         else if ((SSL_CTX_use_PrivateKey_file(mctx->ssl_ctx, keyfile,

                                               SSL_FILETYPE_PEM) < 1)

-                 && (ERR_GET_FUNC(ERR_peek_last_error())

-                     != X509_F_X509_CHECK_PRIVATE_KEY)) {

+                 && CHECK_PRIVKEY_ERROR(ERR_peek_last_error())) {

             ssl_asn1_t *asn1;

             const unsigned char *ptr;

@@ -1462,13 +1523,22 @@

      */

     certfile = APR_ARRAY_IDX(mctx->pks->cert_files, 0, const char *);

     if (certfile && !modssl_is_engine_id(certfile)

-        && (dhparams = ssl_dh_GetParamFromFile(certfile))) {

-        SSL_CTX_set_tmp_dh(mctx->ssl_ctx, dhparams);

+        && (dh = ssl_dh_GetParamFromFile(certfile))) {

+        /* ### This should be replaced with SSL_CTX_set0_tmp_dh_pkey()

+         * for OpenSSL 3.0+. */

+        SSL_CTX_set_tmp_dh(mctx->ssl_ctx, dh);

         ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02540)

                      "Custom DH parameters (%d bits) for %s loaded from %s",

-                     DH_bits(dhparams), vhost_id, certfile);

-        DH_free(dhparams);

+                     modssl_DH_bits(dh), vhost_id, certfile);

+        DH_free(dh);

     }

+#if !MODSSL_USE_OPENSSL_PRE_1_1_API

+    else {

+        /* If no parameter is manually configured, enable auto

+         * selection. */

+        SSL_CTX_set_dh_auto(mctx->ssl_ctx, 1);

+    }

+#endif

 #ifdef HAVE_ECC

     /*

@@ -1518,6 +1588,7 @@

     char buf[TLSEXT_TICKET_KEY_LEN];

     char *path;

     modssl_ticket_key_t *ticket_key = mctx->ticket_key;

+    int res;

     if (!ticket_key->file_path) {

         return APR_SUCCESS;

@@ -1545,11 +1616,22 @@

     }

     memcpy(ticket_key->key_name, buf, 16);

-    memcpy(ticket_key->hmac_secret, buf + 16, 16);

     memcpy(ticket_key->aes_key, buf + 32, 16);

-

-    if (!SSL_CTX_set_tlsext_ticket_key_cb(mctx->ssl_ctx,

-                                          ssl_callback_SessionTicket)) {

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+    memcpy(ticket_key->hmac_secret, buf + 16, 16);

+    res = SSL_CTX_set_tlsext_ticket_key_cb(mctx->ssl_ctx,

+                                           ssl_callback_SessionTicket);

+#else

+    ticket_key->mac_params[0] =

+        OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY, buf + 16, 16);

+    ticket_key->mac_params[1] =

+        OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, "sha256", 0);

+    ticket_key->mac_params[2] =

+        OSSL_PARAM_construct_end();

+    res = SSL_CTX_set_tlsext_ticket_key_evp_cb(mctx->ssl_ctx,

+                                               ssl_callback_SessionTicket);

+#endif

+    if (!res) {

         ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01913)

                      "Unable to initialize TLS session ticket key callback "

                      "(incompatible OpenSSL version?)");

@@ -1680,7 +1762,7 @@

         return ssl_die(s);

     }

-    X509_STORE_load_locations(store, pkp->ca_cert_file, NULL);

+    modssl_X509_STORE_load_locations(store, pkp->ca_cert_file, NULL);

     for (n = 0; n < ncerts; n++) {

         int i;

@@ -2277,10 +2359,11 @@

     }

-#if !MODSSL_USE_OPENSSL_PRE_1_1_API

+#if MODSSL_USE_OPENSSL_PRE_1_1_API

+    free_dh_params();

+#else

     free_bio_methods();

 #endif

-    free_dh_params();

     return APR_SUCCESS;

 }

--- httpd-2.4.51/modules/ssl/ssl_engine_io.c.openssl3

+++ httpd-2.4.51/modules/ssl/ssl_engine_io.c

@@ -194,6 +194,10 @@

 static int bio_filter_out_read(BIO *bio, char *out, int outl)

 {

     /* this is never called */

+    bio_filter_out_ctx_t *outctx = (bio_filter_out_ctx_t *)BIO_get_data(bio);

+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, outctx->c,

+                  "BUG: %s() should not be called", "bio_filter_out_read");

+    AP_DEBUG_ASSERT(0);

     return -1;

 }

@@ -293,12 +297,20 @@

 static int bio_filter_out_gets(BIO *bio, char *buf, int size)

 {

     /* this is never called */

+    bio_filter_out_ctx_t *outctx = (bio_filter_out_ctx_t *)BIO_get_data(bio);

+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, outctx->c,

+                  "BUG: %s() should not be called", "bio_filter_out_gets");

+    AP_DEBUG_ASSERT(0);

     return -1;

 }

 static int bio_filter_out_puts(BIO *bio, const char *str)

 {

     /* this is never called */

+    bio_filter_out_ctx_t *outctx = (bio_filter_out_ctx_t *)BIO_get_data(bio);

+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, outctx->c,

+                  "BUG: %s() should not be called", "bio_filter_out_puts");

+    AP_DEBUG_ASSERT(0);

     return -1;

 }

@@ -533,22 +545,47 @@

 static int bio_filter_in_write(BIO *bio, const char *in, int inl)

 {

+    bio_filter_in_ctx_t *inctx = (bio_filter_in_ctx_t *)BIO_get_data(bio);

+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, inctx->f->c,

+                  "BUG: %s() should not be called", "bio_filter_in_write");

+    AP_DEBUG_ASSERT(0);

     return -1;

 }

 static int bio_filter_in_puts(BIO *bio, const char *str)

 {

+    bio_filter_in_ctx_t *inctx = (bio_filter_in_ctx_t *)BIO_get_data(bio);

+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, inctx->f->c,

+                  "BUG: %s() should not be called", "bio_filter_in_puts");

+    AP_DEBUG_ASSERT(0);

     return -1;

 }

 static int bio_filter_in_gets(BIO *bio, char *buf, int size)

 {

+    bio_filter_in_ctx_t *inctx = (bio_filter_in_ctx_t *)BIO_get_data(bio);

+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, inctx->f->c,

+                  "BUG: %s() should not be called", "bio_filter_in_gets");

+    AP_DEBUG_ASSERT(0);

     return -1;

 }

 static long bio_filter_in_ctrl(BIO *bio, int cmd, long num, void *ptr)

 {

-    return -1;

+    bio_filter_in_ctx_t *inctx = (bio_filter_in_ctx_t *)BIO_get_data(bio);

+    switch (cmd) {

+#ifdef BIO_CTRL_EOF

+    case BIO_CTRL_EOF:

+        return inctx->rc == APR_EOF;

+#endif

+    default:

+        break;

+    }

+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, inctx->f->c,

+                  "BUG: bio_filter_in_ctrl() should not be called with cmd=%i",

+                  cmd);

+    AP_DEBUG_ASSERT(0);

+    return 0;

 }

 #if MODSSL_USE_OPENSSL_PRE_1_1_API

@@ -573,7 +610,7 @@

     bio_filter_in_read,

     bio_filter_in_puts,         /* puts is never called */

     bio_filter_in_gets,         /* gets is never called */

-    bio_filter_in_ctrl,         /* ctrl is never called */

+    bio_filter_in_ctrl,         /* ctrl is called for EOF check */

     bio_filter_create,

     bio_filter_destroy,

     NULL

--- httpd-2.4.51/modules/ssl/ssl_engine_kernel.c.openssl3

+++ httpd-2.4.51/modules/ssl/ssl_engine_kernel.c

@@ -1685,6 +1685,7 @@

 **  _________________________________________________________________

 */

+#if MODSSL_USE_OPENSSL_PRE_1_1_API

 /*

  * Hand out standard DH parameters, based on the authentication strength

  */

@@ -1730,6 +1731,7 @@

     return modssl_get_dh_params(keylen);

 }

+#endif

 /*

  * This OpenSSL callback function is called when OpenSSL

@@ -2614,7 +2616,11 @@

                                unsigned char *keyname,

                                unsigned char *iv,

                                EVP_CIPHER_CTX *cipher_ctx,

-                               HMAC_CTX *hctx,

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+                               HMAC_CTX *hmac_ctx,

+#else

+                               EVP_MAC_CTX *mac_ctx,

+#endif

                                int mode)

 {

     conn_rec *c = (conn_rec *)SSL_get_app_data(ssl);

@@ -2640,7 +2646,13 @@

         }

         EVP_EncryptInit_ex(cipher_ctx, EVP_aes_128_cbc(), NULL,

                            ticket_key->aes_key, iv);

-        HMAC_Init_ex(hctx, ticket_key->hmac_secret, 16, tlsext_tick_md(), NULL);

+

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+        HMAC_Init_ex(hmac_ctx, ticket_key->hmac_secret, 16,

+                     tlsext_tick_md(), NULL);

+#else

+        EVP_MAC_CTX_set_params(mac_ctx, ticket_key->mac_params);

+#endif

         ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(02289)

                       "TLS session ticket key for %s successfully set, "

@@ -2661,7 +2673,13 @@

         EVP_DecryptInit_ex(cipher_ctx, EVP_aes_128_cbc(), NULL,

                            ticket_key->aes_key, iv);

-        HMAC_Init_ex(hctx, ticket_key->hmac_secret, 16, tlsext_tick_md(), NULL);

+

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+        HMAC_Init_ex(hmac_ctx, ticket_key->hmac_secret, 16,

+                     tlsext_tick_md(), NULL);

+#else

+        EVP_MAC_CTX_set_params(mac_ctx, ticket_key->mac_params);

+#endif

         ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(02290)

                       "TLS session ticket key for %s successfully set, "

--- httpd-2.4.51/modules/ssl/ssl_engine_log.c.openssl3

+++ httpd-2.4.51/modules/ssl/ssl_engine_log.c

@@ -78,6 +78,16 @@

     return APR_EGENERAL;

 }

+static APR_INLINE

+unsigned long modssl_ERR_peek_error_data(const char **data, int *flags)

+{

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+    return ERR_peek_error_line_data(NULL, NULL, data, flags);

+#else

+    return ERR_peek_error_data(data, flags);

+#endif

+}

+

 /*

  * Prints the SSL library error information.

  */

@@ -87,7 +97,7 @@

     const char *data;

     int flags;

-    while ((e = ERR_peek_error_line_data(NULL, NULL, &data, &flags))) {

+    while ((e = modssl_ERR_peek_error_data(&data, &flags))) {

         const char *annotation;

         char err[256];

--- httpd-2.4.51/modules/ssl/ssl_private.h.openssl3

+++ httpd-2.4.51/modules/ssl/ssl_private.h

@@ -89,6 +89,9 @@

 /* must be defined before including ssl.h */

 #define OPENSSL_NO_SSL_INTERN

 #endif

+#if OPENSSL_VERSION_NUMBER >= 0x30000000

+#include <openssl/core_names.h>

+#endif

 #include <openssl/ssl.h>

 #include <openssl/err.h>

 #include <openssl/x509.h>

@@ -134,13 +137,12 @@

         SSL_CTX_ctrl(ctx, SSL_CTRL_SET_MIN_PROTO_VERSION, version, NULL)

 #define SSL_CTX_set_max_proto_version(ctx, version) \

         SSL_CTX_ctrl(ctx, SSL_CTRL_SET_MAX_PROTO_VERSION, version, NULL)

-#elif LIBRESSL_VERSION_NUMBER < 0x2070000f

+#endif /* LIBRESSL_VERSION_NUMBER < 0x2060000f */

 /* LibreSSL before 2.7 declares OPENSSL_VERSION_NUMBER == 2.0 but does not

  * include most changes from OpenSSL >= 1.1 (new functions, macros, 

  * deprecations, ...), so we have to work around this...

  */

-#define MODSSL_USE_OPENSSL_PRE_1_1_API (1)

-#endif /* LIBRESSL_VERSION_NUMBER < 0x2060000f */

+#define MODSSL_USE_OPENSSL_PRE_1_1_API (LIBRESSL_VERSION_NUMBER < 0x2070000f)

 #else /* defined(LIBRESSL_VERSION_NUMBER) */

 #define MODSSL_USE_OPENSSL_PRE_1_1_API (OPENSSL_VERSION_NUMBER < 0x10100000L)

 #endif

@@ -681,7 +683,11 @@

 typedef struct {

     const char *file_path;

     unsigned char key_name[16];

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

     unsigned char hmac_secret[16];

+#else

+    OSSL_PARAM mac_params[3];

+#endif

     unsigned char aes_key[16];

 } modssl_ticket_key_t;

 #endif

@@ -945,8 +951,16 @@

 int          ssl_callback_ClientHello(SSL *, int *, void *);

 #endif

 #ifdef HAVE_TLS_SESSION_TICKETS

-int         ssl_callback_SessionTicket(SSL *, unsigned char *, unsigned char *,

-                                       EVP_CIPHER_CTX *, HMAC_CTX *, int);

+int ssl_callback_SessionTicket(SSL *ssl,

+                               unsigned char *keyname,

+                               unsigned char *iv,

+                               EVP_CIPHER_CTX *cipher_ctx,

+#if OPENSSL_VERSION_NUMBER < 0x30000000L

+                               HMAC_CTX *hmac_ctx,

+#else

+                               EVP_MAC_CTX *mac_ctx,

+#endif

+                               int mode);

 #endif

 #ifdef HAVE_TLS_ALPN

@@ -1124,10 +1138,12 @@

 #endif

+#if MODSSL_USE_OPENSSL_PRE_1_1_API

 /* Retrieve DH parameters for given key length.  Return value should

  * be treated as unmutable, since it is stored in process-global

  * memory. */

 DH *modssl_get_dh_params(unsigned keylen);

+#endif

 /* Returns non-zero if the request was made over SSL/TLS.  If sslconn

  * is non-NULL and the request is using SSL/TLS, sets *sslconn to the