Move libapps.a source to apps/lib

This makes it clearer what's what.  The 'openssl' application and its
sub-commands remain in apps/

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/9723)

1 files changed, 1521 insertions, 0 deletions

diff --git a/apps/lib/s_cb.c b/apps/lib/s_cb.c
new file mode 100644
index 0000000000..47b8afe9ef
--- /dev/null
+++ b/apps/lib/s_cb.c
@@ -0,0 +1,1521 @@
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/* callback functions used by s_client, s_server, and s_time */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h> /* for memcpy() and strcmp() */
+#include "apps.h"
+#include <openssl/err.h>
+#include <openssl/rand.h>
+#include <openssl/x509.h>
+#include <openssl/ssl.h>
+#include <openssl/bn.h>
+#ifndef OPENSSL_NO_DH
+# include <openssl/dh.h>
+#endif
+#include "s_apps.h"
+
+#define COOKIE_SECRET_LENGTH    16
+
+VERIFY_CB_ARGS verify_args = { -1, 0, X509_V_OK, 0 };
+
+#ifndef OPENSSL_NO_SOCK
+static unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
+static int cookie_initialized = 0;
+#endif
+static BIO *bio_keylog = NULL;
+
+static const char *lookup(int val, const STRINT_PAIR* list, const char* def)
+{
+    for ( ; list->name; ++list)
+        if (list->retval == val)
+            return list->name;
+    return def;
+}
+
+int verify_callback(int ok, X509_STORE_CTX *ctx)
+{
+    X509 *err_cert;
+    int err, depth;
+
+    err_cert = X509_STORE_CTX_get_current_cert(ctx);
+    err = X509_STORE_CTX_get_error(ctx);
+    depth = X509_STORE_CTX_get_error_depth(ctx);
+
+    if (!verify_args.quiet || !ok) {
+        BIO_printf(bio_err, "depth=%d ", depth);
+        if (err_cert != NULL) {
+            X509_NAME_print_ex(bio_err,
+                               X509_get_subject_name(err_cert),
+                               0, get_nameopt());
+            BIO_puts(bio_err, "\n");
+        } else {
+            BIO_puts(bio_err, "<no cert>\n");
+        }
+    }
+    if (!ok) {
+        BIO_printf(bio_err, "verify error:num=%d:%s\n", err,
+                   X509_verify_cert_error_string(err));
+        if (verify_args.depth < 0 || verify_args.depth >= depth) {
+            if (!verify_args.return_error)
+                ok = 1;
+            verify_args.error = err;
+        } else {
+            ok = 0;
+            verify_args.error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
+        }
+    }
+    switch (err) {
+    case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
+        BIO_puts(bio_err, "issuer= ");
+        X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
+                           0, get_nameopt());
+        BIO_puts(bio_err, "\n");
+        break;
+    case X509_V_ERR_CERT_NOT_YET_VALID:
+    case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
+        BIO_printf(bio_err, "notBefore=");
+        ASN1_TIME_print(bio_err, X509_get0_notBefore(err_cert));
+        BIO_printf(bio_err, "\n");
+        break;
+    case X509_V_ERR_CERT_HAS_EXPIRED:
+    case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
+        BIO_printf(bio_err, "notAfter=");
+        ASN1_TIME_print(bio_err, X509_get0_notAfter(err_cert));
+        BIO_printf(bio_err, "\n");
+        break;
+    case X509_V_ERR_NO_EXPLICIT_POLICY:
+        if (!verify_args.quiet)
+            policies_print(ctx);
+        break;
+    }
+    if (err == X509_V_OK && ok == 2 && !verify_args.quiet)
+        policies_print(ctx);
+    if (ok && !verify_args.quiet)
+        BIO_printf(bio_err, "verify return:%d\n", ok);
+    return ok;
+}
+
+int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
+{
+    if (cert_file != NULL) {
+        if (SSL_CTX_use_certificate_file(ctx, cert_file,
+                                         SSL_FILETYPE_PEM) <= 0) {
+            BIO_printf(bio_err, "unable to get certificate from '%s'\n",
+                       cert_file);
+            ERR_print_errors(bio_err);
+            return 0;
+        }
+        if (key_file == NULL)
+            key_file = cert_file;
+        if (SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0) {
+            BIO_printf(bio_err, "unable to get private key from '%s'\n",
+                       key_file);
+            ERR_print_errors(bio_err);
+            return 0;
+        }
+
+        /*
+         * If we are using DSA, we can copy the parameters from the private
+         * key
+         */
+
+        /*
+         * Now we know that a key and cert have been set against the SSL
+         * context
+         */
+        if (!SSL_CTX_check_private_key(ctx)) {
+            BIO_printf(bio_err,
+                       "Private key does not match the certificate public key\n");
+            return 0;
+        }
+    }
+    return 1;
+}
+
+int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
+                       STACK_OF(X509) *chain, int build_chain)
+{
+    int chflags = chain ? SSL_BUILD_CHAIN_FLAG_CHECK : 0;
+    if (cert == NULL)
+        return 1;
+    if (SSL_CTX_use_certificate(ctx, cert) <= 0) {
+        BIO_printf(bio_err, "error setting certificate\n");
+        ERR_print_errors(bio_err);
+        return 0;
+    }
+
+    if (SSL_CTX_use_PrivateKey(ctx, key) <= 0) {
+        BIO_printf(bio_err, "error setting private key\n");
+        ERR_print_errors(bio_err);
+        return 0;
+    }
+
+    /*
+     * Now we know that a key and cert have been set against the SSL context
+     */
+    if (!SSL_CTX_check_private_key(ctx)) {
+        BIO_printf(bio_err,
+                   "Private key does not match the certificate public key\n");
+        return 0;
+    }
+    if (chain && !SSL_CTX_set1_chain(ctx, chain)) {
+        BIO_printf(bio_err, "error setting certificate chain\n");
+        ERR_print_errors(bio_err);
+        return 0;
+    }
+    if (build_chain && !SSL_CTX_build_cert_chain(ctx, chflags)) {
+        BIO_printf(bio_err, "error building certificate chain\n");
+        ERR_print_errors(bio_err);
+        return 0;
+    }
+    return 1;
+}
+
+static STRINT_PAIR cert_type_list[] = {
+    {"RSA sign", TLS_CT_RSA_SIGN},
+    {"DSA sign", TLS_CT_DSS_SIGN},
+    {"RSA fixed DH", TLS_CT_RSA_FIXED_DH},
+    {"DSS fixed DH", TLS_CT_DSS_FIXED_DH},
+    {"ECDSA sign", TLS_CT_ECDSA_SIGN},
+    {"RSA fixed ECDH", TLS_CT_RSA_FIXED_ECDH},
+    {"ECDSA fixed ECDH", TLS_CT_ECDSA_FIXED_ECDH},
+    {"GOST01 Sign", TLS_CT_GOST01_SIGN},
+    {NULL}
+};
+
+static void ssl_print_client_cert_types(BIO *bio, SSL *s)
+{
+    const unsigned char *p;
+    int i;
+    int cert_type_num = SSL_get0_certificate_types(s, &p);
+    if (!cert_type_num)
+        return;
+    BIO_puts(bio, "Client Certificate Types: ");
+    for (i = 0; i < cert_type_num; i++) {
+        unsigned char cert_type = p[i];
+        const char *cname = lookup((int)cert_type, cert_type_list, NULL);
+
+        if (i)
+            BIO_puts(bio, ", ");
+        if (cname != NULL)
+            BIO_puts(bio, cname);
+        else
+            BIO_printf(bio, "UNKNOWN (%d),", cert_type);
+    }
+    BIO_puts(bio, "\n");
+}
+
+static const char *get_sigtype(int nid)
+{
+    switch (nid) {
+    case EVP_PKEY_RSA:
+        return "RSA";
+
+    case EVP_PKEY_RSA_PSS:
+        return "RSA-PSS";
+
+    case EVP_PKEY_DSA:
+        return "DSA";
+
+     case EVP_PKEY_EC:
+        return "ECDSA";
+
+     case NID_ED25519:
+        return "Ed25519";
+
+     case NID_ED448:
+        return "Ed448";
+
+     case NID_id_GostR3410_2001:
+        return "gost2001";
+
+     case NID_id_GostR3410_2012_256:
+        return "gost2012_256";
+
+     case NID_id_GostR3410_2012_512:
+        return "gost2012_512";
+
+    default:
+        return NULL;
+    }
+}
+
+static int do_print_sigalgs(BIO *out, SSL *s, int shared)
+{
+    int i, nsig, client;
+    client = SSL_is_server(s) ? 0 : 1;
+    if (shared)
+        nsig = SSL_get_shared_sigalgs(s, 0, NULL, NULL, NULL, NULL, NULL);
+    else
+        nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
+    if (nsig == 0)
+        return 1;
+
+    if (shared)
+        BIO_puts(out, "Shared ");
+
+    if (client)
+        BIO_puts(out, "Requested ");
+    BIO_puts(out, "Signature Algorithms: ");
+    for (i = 0; i < nsig; i++) {
+        int hash_nid, sign_nid;
+        unsigned char rhash, rsign;
+        const char *sstr = NULL;
+        if (shared)
+            SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
+                                   &rsign, &rhash);
+        else
+            SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL, &rsign, &rhash);
+        if (i)
+            BIO_puts(out, ":");
+        sstr = get_sigtype(sign_nid);
+        if (sstr)
+            BIO_printf(out, "%s", sstr);
+        else
+            BIO_printf(out, "0x%02X", (int)rsign);
+        if (hash_nid != NID_undef)
+            BIO_printf(out, "+%s", OBJ_nid2sn(hash_nid));
+        else if (sstr == NULL)
+            BIO_printf(out, "+0x%02X", (int)rhash);
+    }
+    BIO_puts(out, "\n");
+    return 1;
+}
+
+int ssl_print_sigalgs(BIO *out, SSL *s)
+{
+    int nid;
+    if (!SSL_is_server(s))
+        ssl_print_client_cert_types(out, s);
+    do_print_sigalgs(out, s, 0);
+    do_print_sigalgs(out, s, 1);
+    if (SSL_get_peer_signature_nid(s, &nid) && nid != NID_undef)
+        BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(nid));
+    if (SSL_get_peer_signature_type_nid(s, &nid))
+        BIO_printf(out, "Peer signature type: %s\n", get_sigtype(nid));
+    return 1;
+}
+
+#ifndef OPENSSL_NO_EC
+int ssl_print_point_formats(BIO *out, SSL *s)
+{
+    int i, nformats;
+    const char *pformats;
+    nformats = SSL_get0_ec_point_formats(s, &pformats);
+    if (nformats <= 0)
+        return 1;
+    BIO_puts(out, "Supported Elliptic Curve Point Formats: ");
+    for (i = 0; i < nformats; i++, pformats++) {
+        if (i)
+            BIO_puts(out, ":");
+        switch (*pformats) {
+        case TLSEXT_ECPOINTFORMAT_uncompressed:
+            BIO_puts(out, "uncompressed");
+            break;
+
+        case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime:
+            BIO_puts(out, "ansiX962_compressed_prime");
+            break;
+
+        case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2:
+            BIO_puts(out, "ansiX962_compressed_char2");
+            break;
+
+        default:
+            BIO_printf(out, "unknown(%d)", (int)*pformats);
+            break;
+
+        }
+    }
+    BIO_puts(out, "\n");
+    return 1;
+}
+
+int ssl_print_groups(BIO *out, SSL *s, int noshared)
+{
+    int i, ngroups, *groups, nid;
+    const char *gname;
+
+    ngroups = SSL_get1_groups(s, NULL);
+    if (ngroups <= 0)
+        return 1;
+    groups = app_malloc(ngroups * sizeof(int), "groups to print");
+    SSL_get1_groups(s, groups);
+
+    BIO_puts(out, "Supported Elliptic Groups: ");
+    for (i = 0; i < ngroups; i++) {
+        if (i)
+            BIO_puts(out, ":");
+        nid = groups[i];
+        /* If unrecognised print out hex version */
+        if (nid & TLSEXT_nid_unknown) {
+            BIO_printf(out, "0x%04X", nid & 0xFFFF);
+        } else {
+            /* TODO(TLS1.3): Get group name here */
+            /* Use NIST name for curve if it exists */
+            gname = EC_curve_nid2nist(nid);
+            if (gname == NULL)
+                gname = OBJ_nid2sn(nid);
+            BIO_printf(out, "%s", gname);
+        }
+    }
+    OPENSSL_free(groups);
+    if (noshared) {
+        BIO_puts(out, "\n");
+        return 1;
+    }
+    BIO_puts(out, "\nShared Elliptic groups: ");
+    ngroups = SSL_get_shared_group(s, -1);
+    for (i = 0; i < ngroups; i++) {
+        if (i)
+            BIO_puts(out, ":");
+        nid = SSL_get_shared_group(s, i);
+        /* TODO(TLS1.3): Convert for DH groups */
+        gname = EC_curve_nid2nist(nid);
+        if (gname == NULL)
+            gname = OBJ_nid2sn(nid);
+        BIO_printf(out, "%s", gname);
+    }
+    if (ngroups == 0)
+        BIO_puts(out, "NONE");
+    BIO_puts(out, "\n");
+    return 1;
+}
+#endif
+
+int ssl_print_tmp_key(BIO *out, SSL *s)
+{
+    EVP_PKEY *key;
+
+    if (!SSL_get_peer_tmp_key(s, &key))
+        return 1;
+    BIO_puts(out, "Server Temp Key: ");
+    switch (EVP_PKEY_id(key)) {
+    case EVP_PKEY_RSA:
+        BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
+        break;
+
+    case EVP_PKEY_DH:
+        BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
+        break;
+#ifndef OPENSSL_NO_EC
+    case EVP_PKEY_EC:
+        {
+            EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
+            int nid;
+            const char *cname;
+            nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
+            EC_KEY_free(ec);
+            cname = EC_curve_nid2nist(nid);
+            if (cname == NULL)
+                cname = OBJ_nid2sn(nid);
+            BIO_printf(out, "ECDH, %s, %d bits\n", cname, EVP_PKEY_bits(key));
+        }
+    break;
+#endif
+    default:
+        BIO_printf(out, "%s, %d bits\n", OBJ_nid2sn(EVP_PKEY_id(key)),
+                   EVP_PKEY_bits(key));
+    }
+    EVP_PKEY_free(key);
+    return 1;
+}
+
+long bio_dump_callback(BIO *bio, int cmd, const char *argp,
+                       int argi, long argl, long ret)
+{
+    BIO *out;
+
+    out = (BIO *)BIO_get_callback_arg(bio);
+    if (out == NULL)
+        return ret;
+
+    if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
+        BIO_printf(out, "read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
+                   (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
+        BIO_dump(out, argp, (int)ret);
+        return ret;
+    } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
+        BIO_printf(out, "write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
+                   (void *)bio, (void *)argp, (unsigned long)argi, ret, ret);
+        BIO_dump(out, argp, (int)ret);
+    }
+    return ret;
+}
+
+void apps_ssl_info_callback(const SSL *s, int where, int ret)
+{
+    const char *str;
+    int w;
+
+    w = where & ~SSL_ST_MASK;
+
+    if (w & SSL_ST_CONNECT)
+        str = "SSL_connect";
+    else if (w & SSL_ST_ACCEPT)
+        str = "SSL_accept";
+    else
+        str = "undefined";
+
+    if (where & SSL_CB_LOOP) {
+        BIO_printf(bio_err, "%s:%s\n", str, SSL_state_string_long(s));
+    } else if (where & SSL_CB_ALERT) {
+        str = (where & SSL_CB_READ) ? "read" : "write";
+        BIO_printf(bio_err, "SSL3 alert %s:%s:%s\n",
+                   str,
+                   SSL_alert_type_string_long(ret),
+                   SSL_alert_desc_string_long(ret));
+    } else if (where & SSL_CB_EXIT) {
+        if (ret == 0)
+            BIO_printf(bio_err, "%s:failed in %s\n",
+                       str, SSL_state_string_long(s));
+        else if (ret < 0)
+            BIO_printf(bio_err, "%s:error in %s\n",
+                       str, SSL_state_string_long(s));
+    }
+}
+
+static STRINT_PAIR ssl_versions[] = {
+    {"SSL 3.0", SSL3_VERSION},
+    {"TLS 1.0", TLS1_VERSION},
+    {"TLS 1.1", TLS1_1_VERSION},
+    {"TLS 1.2", TLS1_2_VERSION},
+    {"TLS 1.3", TLS1_3_VERSION},
+    {"DTLS 1.0", DTLS1_VERSION},
+    {"DTLS 1.0 (bad)", DTLS1_BAD_VER},
+    {NULL}
+};
+
+static STRINT_PAIR alert_types[] = {
+    {" close_notify", 0},
+    {" end_of_early_data", 1},
+    {" unexpected_message", 10},
+    {" bad_record_mac", 20},
+    {" decryption_failed", 21},
+    {" record_overflow", 22},
+    {" decompression_failure", 30},
+    {" handshake_failure", 40},
+    {" bad_certificate", 42},
+    {" unsupported_certificate", 43},
+    {" certificate_revoked", 44},
+    {" certificate_expired", 45},
+    {" certificate_unknown", 46},
+    {" illegal_parameter", 47},
+    {" unknown_ca", 48},
+    {" access_denied", 49},
+    {" decode_error", 50},
+    {" decrypt_error", 51},
+    {" export_restriction", 60},
+    {" protocol_version", 70},
+    {" insufficient_security", 71},
+    {" internal_error", 80},
+    {" inappropriate_fallback", 86},
+    {" user_canceled", 90},
+    {" no_renegotiation", 100},
+    {" missing_extension", 109},
+    {" unsupported_extension", 110},
+    {" certificate_unobtainable", 111},
+    {" unrecognized_name", 112},
+    {" bad_certificate_status_response", 113},
+    {" bad_certificate_hash_value", 114},
+    {" unknown_psk_identity", 115},
+    {" certificate_required", 116},
+    {NULL}
+};
+
+static STRINT_PAIR handshakes[] = {
+    {", HelloRequest", SSL3_MT_HELLO_REQUEST},
+    {", ClientHello", SSL3_MT_CLIENT_HELLO},
+    {", ServerHello", SSL3_MT_SERVER_HELLO},
+    {", HelloVerifyRequest", DTLS1_MT_HELLO_VERIFY_REQUEST},
+    {", NewSessionTicket", SSL3_MT_NEWSESSION_TICKET},
+    {", EndOfEarlyData", SSL3_MT_END_OF_EARLY_DATA},
+    {", EncryptedExtensions", SSL3_MT_ENCRYPTED_EXTENSIONS},
+    {", Certificate", SSL3_MT_CERTIFICATE},
+    {", ServerKeyExchange", SSL3_MT_SERVER_KEY_EXCHANGE},
+    {", CertificateRequest", SSL3_MT_CERTIFICATE_REQUEST},
+    {", ServerHelloDone", SSL3_MT_SERVER_DONE},
+    {", CertificateVerify", SSL3_MT_CERTIFICATE_VERIFY},
+    {", ClientKeyExchange", SSL3_MT_CLIENT_KEY_EXCHANGE},
+    {", Finished", SSL3_MT_FINISHED},
+    {", CertificateUrl", SSL3_MT_CERTIFICATE_URL},
+    {", CertificateStatus", SSL3_MT_CERTIFICATE_STATUS},
+    {", SupplementalData", SSL3_MT_SUPPLEMENTAL_DATA},
+    {", KeyUpdate", SSL3_MT_KEY_UPDATE},
+#ifndef OPENSSL_NO_NEXTPROTONEG
+    {", NextProto", SSL3_MT_NEXT_PROTO},
+#endif
+    {", MessageHash", SSL3_MT_MESSAGE_HASH},
+    {NULL}
+};
+
+void msg_cb(int write_p, int version, int content_type, const void *buf,
+            size_t len, SSL *ssl, void *arg)
+{
+    BIO *bio = arg;
+    const char *str_write_p = write_p ? ">>>" : "<<<";
+    const char *str_version = lookup(version, ssl_versions, "???");
+    const char *str_content_type = "", *str_details1 = "", *str_details2 = "";
+    const unsigned char* bp = buf;
+
+    if (version == SSL3_VERSION ||
+        version == TLS1_VERSION ||
+        version == TLS1_1_VERSION ||
+        version == TLS1_2_VERSION ||
+        version == TLS1_3_VERSION ||
+        version == DTLS1_VERSION || version == DTLS1_BAD_VER) {
+        switch (content_type) {
+        case 20:
+            str_content_type = ", ChangeCipherSpec";
+            break;
+        case 21:
+            str_content_type = ", Alert";
+            str_details1 = ", ???";
+            if (len == 2) {
+                switch (bp[0]) {
+                case 1:
+                    str_details1 = ", warning";
+                    break;
+                case 2:
+                    str_details1 = ", fatal";
+                    break;
+                }
+                str_details2 = lookup((int)bp[1], alert_types, " ???");
+            }
+            break;
+        case 22:
+            str_content_type = ", Handshake";
+            str_details1 = "???";
+            if (len > 0)
+                str_details1 = lookup((int)bp[0], handshakes, "???");
+            break;
+        case 23:
+            str_content_type = ", ApplicationData";
+            break;
+        }
+    }
+
+    BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version,
+               str_content_type, (unsigned long)len, str_details1,
+               str_details2);
+
+    if (len > 0) {
+        size_t num, i;
+
+        BIO_printf(bio, "   ");
+        num = len;
+        for (i = 0; i < num; i++) {
+            if (i % 16 == 0 && i > 0)
+                BIO_printf(bio, "\n   ");
+            BIO_printf(bio, " %02x", ((const unsigned char *)buf)[i]);
+        }
+        if (i < len)
+            BIO_printf(bio, " ...");
+        BIO_printf(bio, "\n");
+    }
+    (void)BIO_flush(bio);
+}
+
+static STRINT_PAIR tlsext_types[] = {
+    {"server name", TLSEXT_TYPE_server_name},
+    {"max fragment length", TLSEXT_TYPE_max_fragment_length},
+    {"client certificate URL", TLSEXT_TYPE_client_certificate_url},
+    {"trusted CA keys", TLSEXT_TYPE_trusted_ca_keys},
+    {"truncated HMAC", TLSEXT_TYPE_truncated_hmac},
+    {"status request", TLSEXT_TYPE_status_request},
+    {"user mapping", TLSEXT_TYPE_user_mapping},
+    {"client authz", TLSEXT_TYPE_client_authz},
+    {"server authz", TLSEXT_TYPE_server_authz},
+    {"cert type", TLSEXT_TYPE_cert_type},
+    {"supported_groups", TLSEXT_TYPE_supported_groups},
+    {"EC point formats", TLSEXT_TYPE_ec_point_formats},
+    {"SRP", TLSEXT_TYPE_srp},
+    {"signature algorithms", TLSEXT_TYPE_signature_algorithms},
+    {"use SRTP", TLSEXT_TYPE_use_srtp},
+    {"session ticket", TLSEXT_TYPE_session_ticket},
+    {"renegotiation info", TLSEXT_TYPE_renegotiate},
+    {"signed certificate timestamps", TLSEXT_TYPE_signed_certificate_timestamp},
+    {"TLS padding", TLSEXT_TYPE_padding},
+#ifdef TLSEXT_TYPE_next_proto_neg
+    {"next protocol", TLSEXT_TYPE_next_proto_neg},
+#endif
+#ifdef TLSEXT_TYPE_encrypt_then_mac
+    {"encrypt-then-mac", TLSEXT_TYPE_encrypt_then_mac},
+#endif
+#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
+    {"application layer protocol negotiation",
+     TLSEXT_TYPE_application_layer_protocol_negotiation},
+#endif
+#ifdef TLSEXT_TYPE_extended_master_secret
+    {"extended master secret", TLSEXT_TYPE_extended_master_secret},
+#endif
+    {"key share", TLSEXT_TYPE_key_share},
+    {"supported versions", TLSEXT_TYPE_supported_versions},
+    {"psk", TLSEXT_TYPE_psk},
+    {"psk kex modes", TLSEXT_TYPE_psk_kex_modes},
+    {"certificate authorities", TLSEXT_TYPE_certificate_authorities},
+    {"post handshake auth", TLSEXT_TYPE_post_handshake_auth},
+    {NULL}
+};
+
+/* from rfc8446 4.2.3. + gost (https://tools.ietf.org/id/draft-smyshlyaev-tls12-gost-suites-04.html) */
+static STRINT_PAIR signature_tls13_scheme_list[] = {
+    {"rsa_pkcs1_sha1",         0x0201 /* TLSEXT_SIGALG_rsa_pkcs1_sha1 */},
+    {"ecdsa_sha1",             0x0203 /* TLSEXT_SIGALG_ecdsa_sha1 */},
+/*  {"rsa_pkcs1_sha224",       0x0301    TLSEXT_SIGALG_rsa_pkcs1_sha224}, not in rfc8446 */
+/*  {"ecdsa_sha224",           0x0303    TLSEXT_SIGALG_ecdsa_sha224}      not in rfc8446 */
+    {"rsa_pkcs1_sha256",       0x0401 /* TLSEXT_SIGALG_rsa_pkcs1_sha256 */},
+    {"ecdsa_secp256r1_sha256", 0x0403 /* TLSEXT_SIGALG_ecdsa_secp256r1_sha256 */},
+    {"rsa_pkcs1_sha384",       0x0501 /* TLSEXT_SIGALG_rsa_pkcs1_sha384 */},
+    {"ecdsa_secp384r1_sha384", 0x0503 /* TLSEXT_SIGALG_ecdsa_secp384r1_sha384 */},
+    {"rsa_pkcs1_sha512",       0x0601 /* TLSEXT_SIGALG_rsa_pkcs1_sha512 */},
+    {"ecdsa_secp521r1_sha512", 0x0603 /* TLSEXT_SIGALG_ecdsa_secp521r1_sha512 */},
+    {"rsa_pss_rsae_sha256",    0x0804 /* TLSEXT_SIGALG_rsa_pss_rsae_sha256 */},
+    {"rsa_pss_rsae_sha384",    0x0805 /* TLSEXT_SIGALG_rsa_pss_rsae_sha384 */},
+    {"rsa_pss_rsae_sha512",    0x0806 /* TLSEXT_SIGALG_rsa_pss_rsae_sha512 */},
+    {"ed25519",                0x0807 /* TLSEXT_SIGALG_ed25519 */},
+    {"ed448",                  0x0808 /* TLSEXT_SIGALG_ed448 */},
+    {"rsa_pss_pss_sha256",     0x0809 /* TLSEXT_SIGALG_rsa_pss_pss_sha256 */},
+    {"rsa_pss_pss_sha384",     0x080a /* TLSEXT_SIGALG_rsa_pss_pss_sha384 */},
+    {"rsa_pss_pss_sha512",     0x080b /* TLSEXT_SIGALG_rsa_pss_pss_sha512 */},
+    {"gostr34102001",          0xeded /* TLSEXT_SIGALG_gostr34102001_gostr3411 */},
+    {"gostr34102012_256",      0xeeee /* TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256 */},
+    {"gostr34102012_512",      0xefef /* TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512 */},
+    {NULL}
+};
+
+/* from rfc5246 7.4.1.4.1. */
+static STRINT_PAIR signature_tls12_alg_list[] = {
+    {"anonymous", TLSEXT_signature_anonymous /* 0 */},
+    {"RSA",       TLSEXT_signature_rsa       /* 1 */},
+    {"DSA",       TLSEXT_signature_dsa       /* 2 */},
+    {"ECDSA",     TLSEXT_signature_ecdsa     /* 3 */},
+    {NULL}
+};
+
+/* from rfc5246 7.4.1.4.1. */
+static STRINT_PAIR signature_tls12_hash_list[] = {
+    {"none",   TLSEXT_hash_none   /* 0 */},
+    {"MD5",    TLSEXT_hash_md5    /* 1 */},
+    {"SHA1",   TLSEXT_hash_sha1   /* 2 */},
+    {"SHA224", TLSEXT_hash_sha224 /* 3 */},
+    {"SHA256", TLSEXT_hash_sha256 /* 4 */},
+    {"SHA384", TLSEXT_hash_sha384 /* 5 */},
+    {"SHA512", TLSEXT_hash_sha512 /* 6 */},
+    {NULL}
+};
+
+void tlsext_cb(SSL *s, int client_server, int type,
+               const unsigned char *data, int len, void *arg)
+{
+    BIO *bio = arg;
+    const char *extname = lookup(type, tlsext_types, "unknown");
+
+    BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
+               client_server ? "server" : "client", extname, type, len);
+    BIO_dump(bio, (const char *)data, len);
+    (void)BIO_flush(bio);
+}
+
+#ifndef OPENSSL_NO_SOCK
+int generate_cookie_callback(SSL *ssl, unsigned char *cookie,
+                             unsigned int *cookie_len)
+{
+    unsigned char *buffer;
+    size_t length = 0;
+    unsigned short port;
+    BIO_ADDR *lpeer = NULL, *peer = NULL;
+
+    /* Initialize a random secret */
+    if (!cookie_initialized) {
+        if (RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH) <= 0) {
+            BIO_printf(bio_err, "error setting random cookie secret\n");
+            return 0;
+        }
+        cookie_initialized = 1;
+    }
+
+    if (SSL_is_dtls(ssl)) {
+        lpeer = peer = BIO_ADDR_new();
+        if (peer == NULL) {
+            BIO_printf(bio_err, "memory full\n");
+            return 0;
+        }
+
+        /* Read peer information */
+        (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), peer);
+    } else {
+        peer = ourpeer;
+    }
+
+    /* Create buffer with peer's address and port */
+    if (!BIO_ADDR_rawaddress(peer, NULL, &length)) {
+        BIO_printf(bio_err, "Failed getting peer address\n");
+        return 0;
+    }
+    OPENSSL_assert(length != 0);
+    port = BIO_ADDR_rawport(peer);
+    length += sizeof(port);
+    buffer = app_malloc(length, "cookie generate buffer");
+
+    memcpy(buffer, &port, sizeof(port));
+    BIO_ADDR_rawaddress(peer, buffer + sizeof(port), NULL);
+
+    /* Calculate HMAC of buffer using the secret */
+    HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
+         buffer, length, cookie, cookie_len);
+
+    OPENSSL_free(buffer);
+    BIO_ADDR_free(lpeer);
+
+    return 1;
+}
+
+int verify_cookie_callback(SSL *ssl, const unsigned char *cookie,
+                           unsigned int cookie_len)
+{
+    unsigned char result[EVP_MAX_MD_SIZE];
+    unsigned int resultlength;
+
+    /* Note: we check cookie_initialized because if it's not,
+     * it cannot be valid */
+    if (cookie_initialized
+        && generate_cookie_callback(ssl, result, &resultlength)
+        && cookie_len == resultlength
+        && memcmp(result, cookie, resultlength) == 0)
+        return 1;
+
+    return 0;
+}
+
+int generate_stateless_cookie_callback(SSL *ssl, unsigned char *cookie,
+                                       size_t *cookie_len)
+{
+    unsigned int temp;
+    int res = generate_cookie_callback(ssl, cookie, &temp);
+    *cookie_len = temp;
+    return res;
+}
+
+int verify_stateless_cookie_callback(SSL *ssl, const unsigned char *cookie,
+                                     size_t cookie_len)
+{
+    return verify_cookie_callback(ssl, cookie, cookie_len);
+}
+
+#endif
+
+/*
+ * Example of extended certificate handling. Where the standard support of
+ * one certificate per algorithm is not sufficient an application can decide
+ * which certificate(s) to use at runtime based on whatever criteria it deems
+ * appropriate.
+ */
+
+/* Linked list of certificates, keys and chains */
+struct ssl_excert_st {
+    int certform;
+    const char *certfile;
+    int keyform;
+    const char *keyfile;
+    const char *chainfile;
+    X509 *cert;
+    EVP_PKEY *key;
+    STACK_OF(X509) *chain;
+    int build_chain;
+    struct ssl_excert_st *next, *prev;
+};
+
+static STRINT_PAIR chain_flags[] = {
+    {"Overall Validity", CERT_PKEY_VALID},
+    {"Sign with EE key", CERT_PKEY_SIGN},
+    {"EE signature", CERT_PKEY_EE_SIGNATURE},
+    {"CA signature", CERT_PKEY_CA_SIGNATURE},
+    {"EE key parameters", CERT_PKEY_EE_PARAM},
+    {"CA key parameters", CERT_PKEY_CA_PARAM},
+    {"Explicitly sign with EE key", CERT_PKEY_EXPLICIT_SIGN},
+    {"Issuer Name", CERT_PKEY_ISSUER_NAME},
+    {"Certificate Type", CERT_PKEY_CERT_TYPE},
+    {NULL}
+};
+
+static void print_chain_flags(SSL *s, int flags)
+{
+    STRINT_PAIR *pp;
+
+    for (pp = chain_flags; pp->name; ++pp)
+        BIO_printf(bio_err, "\t%s: %s\n",
+                   pp->name,
+                   (flags & pp->retval) ? "OK" : "NOT OK");
+    BIO_printf(bio_err, "\tSuite B: ");
+    if (SSL_set_cert_flags(s, 0) & SSL_CERT_FLAG_SUITEB_128_LOS)
+        BIO_puts(bio_err, flags & CERT_PKEY_SUITEB ? "OK\n" : "NOT OK\n");
+    else
+        BIO_printf(bio_err, "not tested\n");
+}
+
+/*
+ * Very basic selection callback: just use any certificate chain reported as
+ * valid. More sophisticated could prioritise according to local policy.
+ */
+static int set_cert_cb(SSL *ssl, void *arg)
+{
+    int i, rv;
+    SSL_EXCERT *exc = arg;
+#ifdef CERT_CB_TEST_RETRY
+    static int retry_cnt;
+    if (retry_cnt < 5) {
+        retry_cnt++;
+        BIO_printf(bio_err,
+                   "Certificate callback retry test: count %d\n",
+                   retry_cnt);
+        return -1;
+    }
+#endif
+    SSL_certs_clear(ssl);
+
+    if (exc == NULL)
+        return 1;
+
+    /*
+     * Go to end of list and traverse backwards since we prepend newer
+     * entries this retains the original order.
+     */
+    while (exc->next != NULL)
+        exc = exc->next;
+
+    i = 0;
+
+    while (exc != NULL) {
+        i++;
+        rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
+        BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
+        X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
+                           get_nameopt());
+        BIO_puts(bio_err, "\n");
+        print_chain_flags(ssl, rv);
+        if (rv & CERT_PKEY_VALID) {
+            if (!SSL_use_certificate(ssl, exc->cert)
+                    || !SSL_use_PrivateKey(ssl, exc->key)) {
+                return 0;
+            }
+            /*
+             * NB: we wouldn't normally do this as it is not efficient
+             * building chains on each connection better to cache the chain
+             * in advance.
+             */
+            if (exc->build_chain) {
+                if (!SSL_build_cert_chain(ssl, 0))
+                    return 0;
+            } else if (exc->chain != NULL) {
+                SSL_set1_chain(ssl, exc->chain);
+            }
+        }
+        exc = exc->prev;
+    }
+    return 1;
+}
+
+void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
+{
+    SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
+}
+
+static int ssl_excert_prepend(SSL_EXCERT **pexc)
+{
+    SSL_EXCERT *exc = app_malloc(sizeof(*exc), "prepend cert");
+
+    memset(exc, 0, sizeof(*exc));
+
+    exc->next = *pexc;
+    *pexc = exc;
+
+    if (exc->next) {
+        exc->certform = exc->next->certform;
+        exc->keyform = exc->next->keyform;
+        exc->next->prev = exc;
+    } else {
+        exc->certform = FORMAT_PEM;
+        exc->keyform = FORMAT_PEM;
+    }
+    return 1;
+
+}
+
+void ssl_excert_free(SSL_EXCERT *exc)
+{
+    SSL_EXCERT *curr;
+
+    if (exc == NULL)
+        return;
+    while (exc) {
+        X509_free(exc->cert);
+        EVP_PKEY_free(exc->key);
+        sk_X509_pop_free(exc->chain, X509_free);
+        curr = exc;
+        exc = exc->next;
+        OPENSSL_free(curr);
+    }
+}
+
+int load_excert(SSL_EXCERT **pexc)
+{
+    SSL_EXCERT *exc = *pexc;
+    if (exc == NULL)
+        return 1;
+    /* If nothing in list, free and set to NULL */
+    if (exc->certfile == NULL && exc->next == NULL) {
+        ssl_excert_free(exc);
+        *pexc = NULL;
+        return 1;
+    }
+    for (; exc; exc = exc->next) {
+        if (exc->certfile == NULL) {
+            BIO_printf(bio_err, "Missing filename\n");
+            return 0;
+        }
+        exc->cert = load_cert(exc->certfile, exc->certform,
+                              "Server Certificate");
+        if (exc->cert == NULL)
+            return 0;
+        if (exc->keyfile != NULL) {
+            exc->key = load_key(exc->keyfile, exc->keyform,
+                                0, NULL, NULL, "Server Key");
+        } else {
+            exc->key = load_key(exc->certfile, exc->certform,
+                                0, NULL, NULL, "Server Key");
+        }
+        if (exc->key == NULL)
+            return 0;
+        if (exc->chainfile != NULL) {
+            if (!load_certs(exc->chainfile, &exc->chain, FORMAT_PEM, NULL,
+                            "Server Chain"))
+                return 0;
+        }
+    }
+    return 1;
+}
+
+enum range { OPT_X_ENUM };
+
+int args_excert(int opt, SSL_EXCERT **pexc)
+{
+    SSL_EXCERT *exc = *pexc;
+
+    assert(opt > OPT_X__FIRST);
+    assert(opt < OPT_X__LAST);
+
+    if (exc == NULL) {
+        if (!ssl_excert_prepend(&exc)) {
+            BIO_printf(bio_err, " %s: Error initialising xcert\n",
+                       opt_getprog());
+            goto err;
+        }
+        *pexc = exc;
+    }
+
+    switch ((enum range)opt) {
+    case OPT_X__FIRST:
+    case OPT_X__LAST:
+        return 0;
+    case OPT_X_CERT:
+        if (exc->certfile != NULL && !ssl_excert_prepend(&exc)) {
+            BIO_printf(bio_err, "%s: Error adding xcert\n", opt_getprog());
+            goto err;
+        }
+        *pexc = exc;
+        exc->certfile = opt_arg();
+        break;
+    case OPT_X_KEY:
+        if (exc->keyfile != NULL) {
+            BIO_printf(bio_err, "%s: K