apps: constify some string parameters
[openssl.git] / apps / s_cb.c
index dd9de46..9dda23c 100644 (file)
 #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
 
 int verify_depth=0;
+int verify_quiet=0;
 int verify_error=X509_V_OK;
 int verify_return_error=0;
 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
@@ -139,15 +144,19 @@ int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
        err=    X509_STORE_CTX_get_error(ctx);
        depth=  X509_STORE_CTX_get_error_depth(ctx);
 
-       BIO_printf(bio_err,"depth=%d ",depth);
-       if (err_cert)
+       if (!verify_quiet || !ok)
                {
-               X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert),
+               BIO_printf(bio_err,"depth=%d ",depth);
+               if (err_cert)
+                       {
+                       X509_NAME_print_ex(bio_err,
+                                       X509_get_subject_name(err_cert),
                                        0, XN_FLAG_ONELINE);
-               BIO_puts(bio_err, "\n");
+                       BIO_puts(bio_err, "\n");
+                       }
+               else
+                       BIO_puts(bio_err, "<no cert>\n");
                }
-       else
-               BIO_puts(bio_err, "<no cert>\n");
        if (!ok)
                {
                BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
@@ -185,13 +194,14 @@ int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
                BIO_printf(bio_err,"\n");
                break;
        case X509_V_ERR_NO_EXPLICIT_POLICY:
-               policies_print(bio_err, ctx);
+               if (!verify_quiet)
+                       policies_print(bio_err, ctx);
                break;
                }
-       if (err == X509_V_OK && ok == 2)
+       if (err == X509_V_OK && ok == 2 && !verify_quiet)
                policies_print(bio_err, ctx);
-
-       BIO_printf(bio_err,"verify return:%d\n",ok);
+       if (ok && !verify_quiet)
+               BIO_printf(bio_err,"verify return:%d\n",ok);
        return(ok);
        }
 
@@ -237,8 +247,8 @@ int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 
                /* 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))
@@ -250,9 +260,11 @@ int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
        return(1);
        }
 
-int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
+int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
+                      STACK_OF(X509) *chain, int build_chain)
        {
-       if (cert ==  NULL)
+       int chflags = chain ? SSL_BUILD_CHAIN_FLAG_CHECK : 0;
+       if (cert == NULL)
                return 1;
        if (SSL_CTX_use_certificate(ctx,cert) <= 0)
                {
@@ -260,24 +272,291 @@ int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key)
                ERR_print_errors(bio_err);
                return 0;
                }
-       if (SSL_CTX_use_PrivateKey(ctx,key) <= 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 private key\n");
+               BIO_printf(bio_err,"error setting certificate chain\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))
+       if (build_chain && !SSL_CTX_build_cert_chain(ctx, chflags))
                {
-               BIO_printf(bio_err,"Private key does not match the certificate public key\n");
+               BIO_printf(bio_err,"error building certificate chain\n");
+               ERR_print_errors(bio_err);
                return 0;
                }
        return 1;
        }
 
+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];
+               char *cname;
+               switch(cert_type)
+                       {
+               case TLS_CT_RSA_SIGN:
+                       cname = "RSA sign";
+                       break;
+
+               case TLS_CT_DSS_SIGN:
+                       cname = "DSA sign";
+                       break;
+
+               case TLS_CT_RSA_FIXED_DH:
+                       cname = "RSA fixed DH";
+                       break;
+
+               case TLS_CT_DSS_FIXED_DH:
+                       cname = "DSS fixed DH";
+                       break;
+
+               case TLS_CT_ECDSA_SIGN:
+                       cname = "ECDSA sign";
+                       break;
+
+               case TLS_CT_RSA_FIXED_ECDH:
+                       cname = "RSA fixed ECDH";
+                       break;
+
+               case TLS_CT_ECDSA_FIXED_ECDH:
+                       cname = "ECDSA fixed ECDH";
+                       break;
+
+               case TLS_CT_GOST94_SIGN:
+                       cname = "GOST94 Sign";
+                       break;
+
+               case TLS_CT_GOST01_SIGN:
+                       cname = "GOST01 Sign";
+                       break;
+
+               default:
+                        cname = NULL;
+                       }
+
+               if (i)
+                       BIO_puts(bio, ", ");
+
+               if (cname)
+                       BIO_puts(bio, cname);
+               else
+                       BIO_printf(bio, "UNKNOWN (%d),", cert_type);
+               }
+       BIO_puts(bio, "\n");
+       }
+
+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, -1, 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, ":");
+               if (sign_nid == EVP_PKEY_RSA)
+                       sstr = "RSA";
+               else if(sign_nid == EVP_PKEY_DSA)
+                       sstr = "DSA";
+               else if(sign_nid == EVP_PKEY_EC)
+                       sstr = "ECDSA";
+               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
+                       BIO_printf(out,"0x%02X", (int)rhash);
+               }
+       BIO_puts(out, "\n");
+       return 1;
+       }
+
+int ssl_print_sigalgs(BIO *out, SSL *s)
+       {
+       int mdnid;
+       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, &mdnid))
+               BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(mdnid));
+       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;
+
+                       }
+               }
+       if (nformats <= 0)
+               BIO_puts(out, "NONE");
+       BIO_puts(out, "\n");
+       return 1;
+       }
+
+int ssl_print_curves(BIO *out, SSL *s, int noshared)
+       {
+       int i, ncurves, *curves, nid;
+       const char *cname;
+       ncurves = SSL_get1_curves(s, NULL);
+       if (ncurves <= 0)
+               return 1;
+       curves = OPENSSL_malloc(ncurves * sizeof(int));
+       SSL_get1_curves(s, curves);
+
+       BIO_puts(out, "Supported Elliptic Curves: ");
+       for (i = 0; i < ncurves; i++)
+               {
+               if (i)
+                       BIO_puts(out, ":");
+               nid = curves[i];
+               /* If unrecognised print out hex version */
+               if (nid & TLSEXT_nid_unknown)
+                       BIO_printf(out, "0x%04X", nid & 0xFFFF);
+               else
+                       {
+                       /* Use NIST name for curve if it exists */
+                       cname = EC_curve_nid2nist(nid);
+                       if (!cname)
+                               cname = OBJ_nid2sn(nid);
+                       BIO_printf(out, "%s", cname);
+                       }
+               }
+       if (ncurves == 0)
+               BIO_puts(out, "NONE");
+       OPENSSL_free(curves);
+       if (noshared)
+               {
+               BIO_puts(out, "\n");
+               return 1;
+               }
+       BIO_puts(out, "\nShared Elliptic curves: ");
+       ncurves = SSL_get_shared_curve(s, -1);
+       for (i = 0; i < ncurves; i++)
+               {
+               if (i)
+                       BIO_puts(out, ":");
+               nid = SSL_get_shared_curve(s, i);
+               cname = EC_curve_nid2nist(nid);
+               if (!cname)
+                       cname = OBJ_nid2sn(nid);
+               BIO_printf(out, "%s", cname);
+               }
+       if (ncurves == 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_server_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_ECDH
+       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)
+                               cname = OBJ_nid2sn(nid);
+                       BIO_printf(out, "ECDH, %s, %d bits\n",
+                                               cname, EVP_PKEY_bits(key));
+                       }
+#endif
+               }
+       EVP_PKEY_free(key);
+       return 1;
+       }
+               
+
 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
                                   int argi, long argl, long ret)
        {
@@ -338,37 +617,37 @@ void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
                }
        }
 
-
-void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
+static const char *ssl_version_str(int version)
        {
-       BIO *bio = arg;
-       const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
-       
-       str_write_p = write_p ? ">>>" : "<<<";
-
        switch (version)
                {
        case SSL2_VERSION:
-               str_version = "SSL 2.0";
-               break;
+               return "SSL 2.0";
        case SSL3_VERSION:
-               str_version = "SSL 3.0 ";
-               break;
+               return "SSL 3.0";
        case TLS1_VERSION:
-               str_version = "TLS 1.0 ";
-               break;
+               return "TLS 1.0";
        case TLS1_1_VERSION:
-               str_version = "TLS 1.1 ";
-               break;
+               return "TLS 1.1";
+       case TLS1_2_VERSION:
+               return "TLS 1.2";
        case DTLS1_VERSION:
-               str_version = "DTLS 1.0 ";
-               break;
+               return "DTLS 1.0";
        case DTLS1_BAD_VER:
-               str_version = "DTLS 1.0 (bad) ";
-               break;
+               return "DTLS 1.0 (bad)";
        default:
-               str_version = "???";
+               return "???";
                }
+       }
+
+void MS_CALLBACK 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, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
+       
+       str_write_p = write_p ? ">>>" : "<<<";
+
+       str_version = ssl_version_str(version);
 
        if (version == SSL2_VERSION)
                {
@@ -433,6 +712,8 @@ void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *
 
        if (version == SSL3_VERSION ||
            version == TLS1_VERSION ||
+           version == TLS1_1_VERSION ||
+           version == TLS1_2_VERSION ||
            version == DTLS1_VERSION ||
            version == DTLS1_BAD_VER)
                {
@@ -552,6 +833,9 @@ void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *
                                case 114:
                                        str_details2 = " bad_certificate_hash_value";
                                        break;
+                               case 115:
+                                       str_details2 = " unknown_psk_identity";
+                                       break;
                                        }
                                }
                        }
@@ -597,9 +881,32 @@ void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *
                                case 20:
                                        str_details1 = ", Finished";
                                        break;
+                               case 23:
+                                       str_details1 = ", SupplementalData";
+                                       break;
                                        }
                                }
                        }
+
+#ifndef OPENSSL_NO_HEARTBEATS
+               if (content_type == 24) /* Heartbeat */
+                       {
+                       str_details1 = ", Heartbeat";
+                       
+                       if (len > 0)
+                               {
+                               switch (((const unsigned char*)buf)[0])
+                                       {
+                               case 1:
+                                       str_details1 = ", HeartbeatRequest";
+                                       break;
+                               case 2:
+                                       str_details1 = ", HeartbeatResponse";
+                                       break;
+                                       }
+                               }
+                       }
+#endif
                }
 
        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);
@@ -660,6 +967,22 @@ void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
                extname = "status request";
                break;
 
+               case TLSEXT_TYPE_user_mapping:
+               extname = "user mapping";
+               break;
+
+               case TLSEXT_TYPE_client_authz:
+               extname = "client authz";
+               break;
+
+               case TLSEXT_TYPE_server_authz:
+               extname = "server authz";
+               break;
+
+               case TLSEXT_TYPE_cert_type:
+               extname = "cert type";
+               break;
+
                case TLSEXT_TYPE_elliptic_curves:
                extname = "elliptic curves";
                break;
@@ -668,12 +991,28 @@ void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
                extname = "EC point formats";
                break;
 
+               case TLSEXT_TYPE_srp:
+               extname = "SRP";
+               break;
+
+               case TLSEXT_TYPE_signature_algorithms:
+               extname = "signature algorithms";
+               break;
+
+               case TLSEXT_TYPE_use_srtp:
+               extname = "use SRTP";
+               break;
+
+               case TLSEXT_TYPE_heartbeat:
+               extname = "heartbeat";
+               break;
+
                case TLSEXT_TYPE_session_ticket:
-               extname = "server ticket";
+               extname = "session ticket";
                break;
 
-               case TLSEXT_TYPE_renegotiate:
-               extname = "renegotiate";
+               case TLSEXT_TYPE_renegotiate: 
+               extname = "renegotiation info";
                break;
 
 #ifdef TLSEXT_TYPE_opaque_prf_input
@@ -681,6 +1020,16 @@ void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
                extname = "opaque PRF input";
                break;
 #endif
+#ifdef TLSEXT_TYPE_next_proto_neg
+               case TLSEXT_TYPE_next_proto_neg:
+               extname = "next protocol";
+               break;
+#endif
+#ifdef TLSEXT_TYPE_encrypt_then_mac
+               case TLSEXT_TYPE_encrypt_then_mac:
+               extname = "encrypt-then-mac";
+               break;
+#endif
 
                default:
                extname = "unknown";
@@ -863,3 +1212,748 @@ int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned
 
        return 0;
        }
+
+/* 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;
+       };
+
+struct chain_flags
+       {
+       int flag;
+       const char *name;
+       };
+
+struct chain_flags chain_flags_list[] =
+       {
+               {CERT_PKEY_VALID, "Overall Validity"},
+               {CERT_PKEY_SIGN,  "Sign with EE key"},
+               {CERT_PKEY_EE_SIGNATURE, "EE signature"},
+               {CERT_PKEY_CA_SIGNATURE, "CA signature"},
+               {CERT_PKEY_EE_PARAM, "EE key parameters"},
+               {CERT_PKEY_CA_PARAM, "CA key parameters"},
+               {CERT_PKEY_EXPLICIT_SIGN,  "Explicity sign with EE key"},
+               {CERT_PKEY_ISSUER_NAME,  "Issuer Name"},
+               {CERT_PKEY_CERT_TYPE,  "Certificate Type"},
+               {0, NULL}
+       };
+
+
+static void print_chain_flags(BIO *out, int flags)
+       {
+       struct chain_flags *ctmp = chain_flags_list;
+       while(ctmp->name)
+               {
+               BIO_printf(out, "\t%s: %s\n", ctmp->name,
+                               flags & ctmp->flag ? "OK" : "NOT OK");
+               ctmp++;
+               }
+       }
+
+/* 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++;
+               fprintf(stderr, "Certificate callback retry test: count %d\n",
+                                                               retry_cnt);
+               return -1;
+               }
+#endif
+       SSL_certs_clear(ssl);
+
+       if (!exc)
+               return 1;
+
+       /* Go to end of list and traverse backwards since we prepend
+        * newer entries this retains the original order.
+        */
+       while (exc->next)
+               exc = exc->next;
+
+       i = 0;  
+
+       while(exc)
+               {
+               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,
+                                                       XN_FLAG_ONELINE);
+               BIO_puts(bio_err, "\n");
+               
+               print_chain_flags(bio_err, rv);
+               if (rv & CERT_PKEY_VALID)
+                       {
+                       SSL_use_certificate(ssl, exc->cert);
+                       SSL_use_PrivateKey(ssl, exc->key);
+                       /* 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)
+                               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;
+       exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
+       if (!exc)
+               return 0;
+       exc->certfile = NULL;
+       exc->keyfile = NULL;
+       exc->chainfile = NULL;
+       exc->cert = NULL;
+       exc->key = NULL;
+       exc->chain = NULL;
+       exc->prev = NULL;
+       exc->build_chain = 0;
+
+       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;
+       while (exc)
+               {
+               if (exc->cert)
+                       X509_free(exc->cert);
+               if (exc->key)
+                       EVP_PKEY_free(exc->key);
+               if (exc->chain)
+                       sk_X509_pop_free(exc->chain, X509_free);
+               curr = exc;
+               exc = exc->next;
+               OPENSSL_free(curr);
+               }
+       }
+
+int load_excert(SSL_EXCERT **pexc, BIO *err)
+       {
+       SSL_EXCERT *exc = *pexc;
+       if (!exc)
+               return 1;
+       /* If nothing in list, free and set to NULL */
+       if (!exc->certfile && !exc->next)
+               {
+               ssl_excert_free(exc);
+               *pexc = NULL;
+               return 1;
+               }
+       for(; exc; exc=exc->next)
+               {
+               if (!exc->certfile)
+                       {
+                       BIO_printf(err, "Missing filename\n");
+                       return 0;
+                       }
+               exc->cert = load_cert(err, exc->certfile, exc->certform,
+                                       NULL, NULL, "Server Certificate");
+               if (!exc->cert)
+                       return 0;
+               if (exc->keyfile)
+                       exc->keyfile = exc->certfile;
+               exc->key = load_key(err, exc->certfile, exc->certform, 0,
+                                       NULL, NULL, "Server Certificate");
+               if (!exc->key)
+                       return 0;
+               if (exc->chainfile)
+                       {
+                       exc->chain = load_certs(err,
+                                               exc->chainfile, FORMAT_PEM,
+                                               NULL, NULL,
+                                               "Server Chain");
+                       if (!exc->chainfile)
+                               return 0;
+                       }
+               }
+       return 1;
+       }
+               
+
+int args_excert(char ***pargs, int *pargc,
+                       int *badarg, BIO *err, SSL_EXCERT **pexc)
+       {
+       char *arg = **pargs, *argn = (*pargs)[1];
+       SSL_EXCERT *exc = *pexc;
+       int narg = 2;
+       if (!exc)
+               {
+               if (ssl_excert_prepend(&exc))
+                       *pexc = exc;
+               else
+                       {
+                       BIO_printf(err, "Error initialising xcert\n");
+                       *badarg = 1;
+                       goto err;
+                       }
+               }
+       if (strcmp(arg, "-xcert") == 0)
+               {
+               if (!argn)
+                       {
+                       *badarg = 1;
+                       return 1;
+                       }
+               if (exc->certfile && !ssl_excert_prepend(&exc))
+                       {
+                       BIO_printf(err, "Error adding xcert\n");
+                       *badarg = 1;
+                       goto err;
+                       }
+               exc->certfile = argn;
+               }
+       else if (strcmp(arg,"-xkey") == 0)
+               {
+               if (!argn)
+                       {
+                       *badarg = 1;
+                       return 1;
+                       }
+               if (exc->keyfile)
+                       {
+                       BIO_printf(err, "Key already specified\n");
+                       *badarg = 1;
+                       return 1;
+                       }
+               exc->keyfile = argn;
+               }
+       else if (strcmp(arg,"-xchain") == 0)
+               {
+               if (!argn)
+                       {
+                       *badarg = 1;
+                       return 1;
+                       }
+               if (exc->chainfile)
+                       {
+                       BIO_printf(err, "Chain already specified\n");
+                       *badarg = 1;
+                       return 1;
+                       }
+               exc->chainfile = argn;
+               }
+       else if (strcmp(arg,"-xchain_build") == 0)
+               {
+               narg = 1;
+               exc->build_chain = 1;
+               }
+       else if (strcmp(arg,"-xcertform") == 0)
+               {
+               if (!argn)
+                       {
+                       *badarg = 1;
+                       goto err;
+                       }
+               exc->certform = str2fmt(argn);
+               }
+       else if (strcmp(arg,"-xkeyform") == 0)
+               {
+               if (!argn)
+                       {
+                       *badarg = 1;
+                       goto err;
+                       }
+               exc->keyform = str2fmt(argn);
+               }
+       else
+               return 0;
+
+       (*pargs) += narg;
+
+       if (pargc)
+               *pargc -= narg;
+
+       *pexc = exc;
+
+       return 1;
+
+       err:
+       ERR_print_errors(err);
+       ssl_excert_free(exc);
+       *pexc = NULL;
+       return 1;
+       }
+
+static void print_raw_cipherlist(BIO *bio, SSL *s)
+       {
+       const unsigned char *rlist;
+       static const unsigned char scsv_id[] = {0, 0, 0xFF};
+       size_t i, rlistlen, num;
+       if (!SSL_is_server(s))
+               return;
+       num = SSL_get0_raw_cipherlist(s, NULL);
+       rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
+       BIO_puts(bio, "Client cipher list: ");
+       for (i = 0; i < rlistlen; i += num, rlist += num)
+               {
+               const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
+               if (i)
+                       BIO_puts(bio, ":");
+               if (c)
+                       BIO_puts(bio, SSL_CIPHER_get_name(c));
+               else if (!memcmp(rlist, scsv_id - num + 3, num))
+                       BIO_puts(bio, "SCSV");
+               else
+                       {
+                       size_t j;
+                       BIO_puts(bio, "0x");
+                       for (j = 0; j < num; j++)
+                               BIO_printf(bio, "%02X", rlist[j]);
+                       }
+               }
+       BIO_puts(bio, "\n");
+       }
+       
+
+void print_ssl_summary(BIO *bio, SSL *s)
+       {
+       const SSL_CIPHER *c;
+       X509 *peer;
+       /*const char *pnam = SSL_is_server(s) ? "client" : "server";*/
+       BIO_printf(bio, "Protocol version: %s\n", SSL_get_version(s));
+       print_raw_cipherlist(bio, s);
+       c = SSL_get_current_cipher(s);
+       BIO_printf(bio,"Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
+       do_print_sigalgs(bio, s, 0);
+       peer = SSL_get_peer_certificate(s);
+       if (peer)
+               {
+               int nid;
+               BIO_puts(bio, "Peer certificate: ");
+               X509_NAME_print_ex(bio, X509_get_subject_name(peer),
+                                       0, XN_FLAG_ONELINE);
+               BIO_puts(bio, "\n");
+               if (SSL_get_peer_signature_nid(s, &nid))
+                       BIO_printf(bio, "Hash used: %s\n", OBJ_nid2sn(nid));
+               }
+       else
+               BIO_puts(bio, "No peer certificate\n");
+       if (peer)
+               X509_free(peer);
+#ifndef OPENSSL_NO_EC
+       ssl_print_point_formats(bio, s);
+       if (SSL_is_server(s))
+               ssl_print_curves(bio, s, 1);
+       else
+               ssl_print_tmp_key(bio, s);
+#else
+       if (!SSL_is_server(s))
+               ssl_print_tmp_key(bio, s);
+#endif
+       }
+
+int args_ssl(char ***pargs, int *pargc, SSL_CONF_CTX *cctx,
+                       int *badarg, BIO *err, STACK_OF(OPENSSL_STRING) **pstr)
+       {
+       char *arg = **pargs, *argn = (*pargs)[1];
+       int rv;
+
+       /* Attempt to run SSL configuration command */
+       rv = SSL_CONF_cmd_argv(cctx, pargc, pargs);
+       /* If parameter not recognised just return */
+       if (rv == 0)
+               return 0;
+       /* see if missing argument error */
+       if (rv == -3)
+               {
+               BIO_printf(err, "%s needs an argument\n", arg);
+               *badarg = 1;
+               goto end;
+               }
+       /* Check for some other error */
+       if (rv < 0)
+               {
+               BIO_printf(err, "Error with command: \"%s %s\"\n",
+                                               arg, argn ? argn : "");
+               *badarg = 1;
+               goto end;
+               }
+       /* Store command and argument */
+       /* If only one argument processed store value as NULL */
+       if (rv == 1)
+               argn = NULL;
+       if (!*pstr)
+               *pstr = sk_OPENSSL_STRING_new_null();
+       if (!*pstr || !sk_OPENSSL_STRING_push(*pstr, arg) ||
+                               !sk_OPENSSL_STRING_push(*pstr, argn))
+               {
+               BIO_puts(err, "Memory allocation failure\n");
+               goto end;
+               }
+
+       end:
+       if (*badarg)
+               ERR_print_errors(err);
+
+       return 1;
+       }
+
+int args_ssl_call(SSL_CTX *ctx, BIO *err, SSL_CONF_CTX *cctx,
+               STACK_OF(OPENSSL_STRING) *str, int no_ecdhe, int no_jpake)
+       {
+       int i;
+       SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
+       for (i = 0; i < sk_OPENSSL_STRING_num(str); i+= 2)
+               {
+               const char *param = sk_OPENSSL_STRING_value(str, i);
+               const char *value = sk_OPENSSL_STRING_value(str, i + 1);
+               /* If no_ecdhe or named curve already specified don't need
+                * a default.
+                */
+               if (!no_ecdhe && !strcmp(param, "-named_curve"))
+                       no_ecdhe = 1;
+#ifndef OPENSSL_NO_JPAKE
+               if (!no_jpake && !strcmp(param, "-cipher"))
+                       {
+                       BIO_puts(err, "JPAKE sets cipher to PSK\n");
+                       return 0;
+                       }
+#endif
+               if (SSL_CONF_cmd(cctx, param, value) <= 0)
+                       {
+                       BIO_printf(err, "Error with command: \"%s %s\"\n",
+                                               param, value ? value : "");
+                       ERR_print_errors(err);
+                       return 0;
+                       }
+               }
+       /* This is a special case to keep existing s_server functionality:
+        * if we don't have any curve specified *and* we haven't disabled
+        * ECDHE then use P-256.
+        */
+       if (!no_ecdhe)
+               {
+               if (SSL_CONF_cmd(cctx, "-named_curve", "P-256") <= 0)
+                       {
+                       BIO_puts(err, "Error setting EC curve\n");
+                       ERR_print_errors(err);
+                       return 0;
+                       }
+               }
+#ifndef OPENSSL_NO_JPAKE
+       if (!no_jpake)
+               {
+               if (SSL_CONF_cmd(cctx, "-cipher", "PSK") <= 0)
+                       {
+                       BIO_puts(err, "Error setting cipher to PSK\n");
+                       ERR_print_errors(err);
+                       return 0;
+                       }
+               }
+#endif
+       if (!SSL_CONF_CTX_finish(cctx))
+               {
+               BIO_puts(err, "Error finishing context\n");
+               ERR_print_errors(err);
+               return 0;
+               }
+       return 1;
+       }
+
+static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
+       {
+       X509_CRL *crl;
+       int i;
+       for (i = 0; i < sk_X509_CRL_num(crls); i++)
+               {
+               crl = sk_X509_CRL_value(crls, i);
+               X509_STORE_add_crl(st, crl);
+               }
+       return 1;
+       }
+
+int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls, int crl_download)
+       {
+       X509_STORE *st;
+       st = SSL_CTX_get_cert_store(ctx);
+       add_crls_store(st, crls);
+       if (crl_download)
+               store_setup_crl_download(st);
+       return 1;
+       }
+
+int ssl_load_stores(SSL_CTX *ctx,
+                       const char *vfyCApath, const char *vfyCAfile,
+                       const char *chCApath, const char *chCAfile,
+                       STACK_OF(X509_CRL) *crls, int crl_download)
+       {
+       X509_STORE *vfy = NULL, *ch = NULL;
+       int rv = 0;
+       if (vfyCApath || vfyCAfile)
+               {
+               vfy = X509_STORE_new();
+               if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
+                       goto err;
+               add_crls_store(vfy, crls);
+               SSL_CTX_set1_verify_cert_store(ctx, vfy);
+               if (crl_download)
+                       store_setup_crl_download(vfy);
+               }
+       if (chCApath || chCAfile)
+               {
+               ch = X509_STORE_new();
+               if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
+                       goto err;
+               SSL_CTX_set1_chain_cert_store(ctx, ch);
+               }
+       rv = 1;
+       err:
+       if (vfy)
+               X509_STORE_free(vfy);
+       if (ch)
+               X509_STORE_free(ch);
+       return rv;
+       }
+
+/* Verbose print out of security callback */
+
+typedef struct
+       {
+       BIO *out;
+       int verbose;
+       int (*old_cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid,
+                               void *other, void *ex);
+       } security_debug_ex;
+
+static int security_callback_debug(SSL *s, SSL_CTX *ctx,
+                               int op, int bits, int nid,
+                               void *other, void *ex)
+       {
+       security_debug_ex *sdb = ex;
+       int rv, show_bits = 1, cert_md = 0;
+       const char *nm;
+       rv = sdb->old_cb(s, ctx, op, bits, nid, other, ex);
+       if (rv == 1 && sdb->verbose < 2)
+               return 1;
+       BIO_puts(sdb->out, "Security callback: ");
+
+       switch (op)
+               {
+       case SSL_SECOP_CIPHER_SUPPORTED:
+               nm = "Supported Ciphersuite";
+               break;
+       case SSL_SECOP_CIPHER_SHARED:
+               nm = "Shared Ciphersuite";
+               break;
+       case SSL_SECOP_CIPHER_CHECK:
+               nm = "Check Ciphersuite";
+               break;
+       case SSL_SECOP_TICKET:
+               BIO_puts(sdb->out, "Session ticket");
+               show_bits = 0;
+               nm = NULL;
+               break;
+       case SSL_SECOP_COMPRESSION:
+               BIO_puts(sdb->out, "SSL compression");
+               show_bits = 0;
+               nm = NULL;
+               break;
+#ifndef OPENSSL_NO_DH
+       case SSL_SECOP_TMP_DH:
+               nm = "Temp DH key bits";
+               break;
+#endif
+       case SSL_SECOP_CURVE_SUPPORTED:
+               nm = "Supported Curve";
+               break;
+       case SSL_SECOP_CURVE_SHARED:
+               nm = "Shared Curve";
+               break;
+       case SSL_SECOP_CURVE_CHECK:
+               nm = "Check Curve";
+               break;
+       case SSL_SECOP_SSL2_COMPAT:
+               BIO_puts(sdb->out, "SSLv2 compatible");
+               show_bits = 0;
+               nm = NULL;
+               break;
+       case SSL_SECOP_VERSION:
+               BIO_printf(sdb->out, "Version=%s", ssl_version_str(nid));
+               show_bits = 0;
+               nm = NULL;
+               break;
+       case SSL_SECOP_SIGALG_SUPPORTED:
+               nm = "Supported Signature Algorithm digest";
+               break;
+       case SSL_SECOP_SIGALG_SHARED:
+               nm = "Shared Signature Algorithm digest";
+               break;
+       case SSL_SECOP_SIGALG_CHECK:
+               nm = "Check Signature Algorithm digest";
+               break;
+       case SSL_SECOP_SIGALG_MASK:
+               nm = "Signature Algorithm mask";
+               break;
+       case SSL_SECOP_EE_KEY:
+               nm = "Certificate chain EE key";
+               break;
+       case SSL_SECOP_CA_KEY:
+               nm = "Certificate chain CA key";
+               break;
+       case SSL_SECOP_CA_MD:
+               cert_md = 1;
+               nm = "Certificate chain CA digest";
+               break;
+       case SSL_SECOP_PEER_EE_KEY:
+               nm = "Peer Chain EE key";
+               break;
+       case SSL_SECOP_PEER_CA_KEY:
+               nm = "Peer Chain CA key";
+               break;
+       case SSL_SECOP_PEER_CA_MD:
+               cert_md = 1;
+               nm = "Peer chain CA digest";
+               break;
+       default:
+               nm = NULL;
+               }
+       if (nm)
+               BIO_printf(sdb->out, "%s=", nm);
+
+       switch (op & SSL_SECOP_OTHER_TYPE)
+               {
+
+       case SSL_SECOP_OTHER_CIPHER:
+               BIO_puts(sdb->out, SSL_CIPHER_get_name(other));
+               break;
+
+       case SSL_SECOP_OTHER_CURVE:
+                       {
+                       const char *cname;
+                       cname = EC_curve_nid2nist(nid);
+                       if (cname == NULL)
+                               cname = OBJ_nid2sn(nid);
+                       BIO_puts(sdb->out, cname);
+                       }
+                       break;
+
+       case SSL_SECOP_OTHER_DH:
+                       {
+                       DH *dh = other;
+                       BIO_printf(sdb->out, "%d", BN_num_bits(dh->p));
+                       break;
+                       }
+       case SSL_SECOP_OTHER_CERT:
+                       {
+                       if (cert_md)
+                               {
+                               int sig_nid = X509_get_signature_nid(other);
+                               BIO_puts(sdb->out, OBJ_nid2sn(sig_nid));
+                               }
+                       else
+                               {
+                               EVP_PKEY *pkey = X509_get_pubkey(other);
+                               const char *algname = "";
+                               EVP_PKEY_asn1_get0_info(NULL, NULL, NULL, NULL,
+                                               &algname,
+                                               EVP_PKEY_get0_asn1(pkey));
+                               BIO_printf(sdb->out, "%s, bits=%d",
+                                               algname, EVP_PKEY_bits(pkey));
+                               EVP_PKEY_free(pkey);
+                               }
+                       break;
+                       }
+       case SSL_SECOP_OTHER_SIGALG:
+                       {
+                       const unsigned char *salg = other;
+                       const char *sname = NULL;
+                       switch (salg[1])
+                               {
+                       case TLSEXT_signature_anonymous:
+                               sname = "anonymous";
+                               break;
+                       case TLSEXT_signature_rsa:
+                               sname = "RSA";
+                               break;
+                       case TLSEXT_signature_dsa:
+                               sname = "DSA";
+                               break;
+                       case TLSEXT_signature_ecdsa:
+                               sname = "ECDSA";
+                               break;
+                               }
+                               
+                       BIO_puts(sdb->out, OBJ_nid2sn(nid));
+                       if (sname)
+                               BIO_printf(sdb->out, ", algorithm=%s", sname);
+                       else
+                               BIO_printf(sdb->out, ", algid=%d", salg[1]);
+                       break;
+                       }
+       
+               }
+
+       if (show_bits)
+               BIO_printf(sdb->out, ", security bits=%d", bits);
+       BIO_printf(sdb->out, ": %s\n", rv ? "yes" : "no");
+       return rv;
+       }
+
+void ssl_ctx_security_debug(SSL_CTX *ctx, BIO *out, int verbose)
+       {
+       static security_debug_ex sdb;
+       sdb.out = out;
+       sdb.verbose = verbose;
+       sdb.old_cb = SSL_CTX_get_security_callback(ctx);
+       SSL_CTX_set_security_callback(ctx, security_callback_debug);
+       SSL_CTX_set0_security_ex_data(ctx, &sdb);
+       }
+
+
+