Fix some bugs and document others
[openssl.git] / apps / s_server.c
index 0a25d8cb0359a2d68fbbc520f29ba6a721404a7d..af19b89227a0140454d32afe88d66cb58dab46ce 100644 (file)
  * [including the GNU Public Licence.]
  */
 
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef NO_STDIO
+#define APPS_WIN16
+#endif
+
 /* With IPv6, it looks like Digital has mixed up the proper order of
    recursive header file inclusion, resulting in the compiler complaining
    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
 typedef unsigned int u_int;
 #endif
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#ifdef NO_STDIO
-#define APPS_WIN16
-#endif
 #include <openssl/lhash.h>
 #include <openssl/bn.h>
 #define USE_SOCKETS
@@ -83,17 +85,17 @@ typedef unsigned int u_int;
 #include <openssl/ssl.h>
 #include "s_apps.h"
 
+#ifdef WINDOWS
+#include <conio.h>
+#endif
+
 #if (defined(VMS) && __VMS_VER < 70000000)
 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
 #undef FIONBIO
 #endif
 
-#if defined(NO_RSA) && !defined(NO_SSL2)
-#define NO_SSL2
-#endif
-
 #ifndef NO_RSA
-static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int export,int keylength);
+static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength);
 #endif
 static int sv_body(char *hostname, int s, unsigned char *context);
 static int www_body(char *hostname, int s, unsigned char *context);
@@ -102,17 +104,19 @@ static void sv_usage(void);
 static int init_ssl_connection(SSL *s);
 static void print_stats(BIO *bp,SSL_CTX *ctx);
 #ifndef NO_DH
-static DH *load_dh_param(void );
+static DH *load_dh_param(char *dhfile);
 static DH *get_dh512(void);
 #endif
-/* static void s_server_init(void);*/
+#ifdef MONOLITH
+static void s_server_init(void);
+#endif
 
 #ifndef S_ISDIR
-#if defined(VMS) && !defined(__DECC)
-#define S_ISDIR(a)     (((a) & S_IFMT) == S_IFDIR)
-#else
-#define S_ISDIR(a)     (((a) & _S_IFMT) == _S_IFDIR)
-#endif
+# if defined(_S_IFMT) && defined(_S_IFDIR)
+#  define S_ISDIR(a)   (((a) & _S_IFMT) == _S_IFDIR)
+# else
+#  define S_ISDIR(a)   (((a) & S_IFMT) == S_IFDIR)
+# endif
 #endif
 
 #ifndef NO_DH
@@ -145,15 +149,13 @@ static DH *get_dh512(void)
 
 #undef BUFSIZZ
 #define BUFSIZZ        16*1024
-static int bufsize=32;
+static int bufsize=BUFSIZZ;
 static int accept_socket= -1;
 
 #define TEST_CERT      "server.pem"
 #undef PROG
 #define PROG           s_server_main
 
-#define DH_PARAM       "server.pem"
-
 extern int verify_depth;
 
 static char *cipher=NULL;
@@ -165,6 +167,7 @@ static char *s_dcert_file=NULL,*s_dkey_file=NULL;
 static int s_nbio=0;
 #endif
 static int s_nbio_test=0;
+int s_crlf=0;
 static SSL_CTX *ctx=NULL;
 static int www=0;
 
@@ -172,9 +175,12 @@ static BIO *bio_s_out=NULL;
 static int s_debug=0;
 static int s_quiet=0;
 
-#if 0
+static int hack=0;
+
+#ifdef MONOLITH
 static void s_server_init(void)
        {
+       accept_socket=-1;
        cipher=NULL;
        s_server_verify=SSL_VERIFY_NONE;
        s_dcert_file=NULL;
@@ -191,6 +197,7 @@ static void s_server_init(void)
        bio_s_out=NULL;
        s_debug=0;
        s_quiet=0;
+       hack=0;
        }
 #endif
 
@@ -204,14 +211,17 @@ static void sv_usage(void)
        BIO_printf(bio_err," -Verify arg   - turn on peer certificate verification, must have a cert.\n");
        BIO_printf(bio_err," -cert arg     - certificate file to use, PEM format assumed\n");
        BIO_printf(bio_err,"                 (default is %s)\n",TEST_CERT);
-       BIO_printf(bio_err," -key arg      - RSA file to use, PEM format assumed, in cert file if\n");
+       BIO_printf(bio_err," -key arg      - Private Key file to use, PEM format assumed, in cert file if\n");
        BIO_printf(bio_err,"                 not specified (default is %s)\n",TEST_CERT);
        BIO_printf(bio_err," -dcert arg    - second certificate file to use (usually for DSA)\n");
        BIO_printf(bio_err," -dkey arg     - second private key file to use (usually for DSA)\n");
+       BIO_printf(bio_err," -dhparam arg  - DH parameter file to use, in cert file if not specified\n");
+       BIO_printf(bio_err,"                 or a default set of parameters is used\n");
 #ifdef FIONBIO
        BIO_printf(bio_err," -nbio         - Run with non-blocking IO\n");
 #endif
        BIO_printf(bio_err," -nbio_test    - test with the non-blocking test bio\n");
+       BIO_printf(bio_err," -crlf         - convert LF from terminal into CRLF\n");
        BIO_printf(bio_err," -debug        - Print more output\n");
        BIO_printf(bio_err," -state        - Print the SSL states\n");
        BIO_printf(bio_err," -CApath arg   - PEM format directory of CA's\n");
@@ -226,24 +236,179 @@ static void sv_usage(void)
        BIO_printf(bio_err," -no_ssl2      - Just disable SSLv2\n");
        BIO_printf(bio_err," -no_ssl3      - Just disable SSLv3\n");
        BIO_printf(bio_err," -no_tls1      - Just disable TLSv1\n");
-       BIO_printf(bio_err," -bugs         - Turn on SSL bug compatability\n");
+#ifndef NO_DH
+       BIO_printf(bio_err," -no_dhe       - Disable ephemeral DH\n");
+#endif
+       BIO_printf(bio_err," -bugs         - Turn on SSL bug compatibility\n");
        BIO_printf(bio_err," -www          - Respond to a 'GET /' with a status page\n");
        BIO_printf(bio_err," -WWW          - Respond to a 'GET /<path> HTTP/1.0' with file ./<path>\n");
        }
 
 static int local_argc=0;
 static char **local_argv;
-static int hack=0;
+
+#ifdef CHARSET_EBCDIC
+static int ebcdic_new(BIO *bi);
+static int ebcdic_free(BIO *a);
+static int ebcdic_read(BIO *b, char *out, int outl);
+static int ebcdic_write(BIO *b, char *in, int inl);
+static long ebcdic_ctrl(BIO *b, int cmd, long num, char *ptr);
+static int ebcdic_gets(BIO *bp, char *buf, int size);
+static int ebcdic_puts(BIO *bp, char *str);
+
+#define BIO_TYPE_EBCDIC_FILTER (18|0x0200)
+static BIO_METHOD methods_ebcdic=
+       {
+       BIO_TYPE_EBCDIC_FILTER,
+       "EBCDIC/ASCII filter",
+       ebcdic_write,
+       ebcdic_read,
+       ebcdic_puts,
+       ebcdic_gets,
+       ebcdic_ctrl,
+       ebcdic_new,
+       ebcdic_free,
+       };
+
+typedef struct
+{
+       size_t  alloced;
+       char    buff[1];
+} EBCDIC_OUTBUFF;
+
+BIO_METHOD *BIO_f_ebcdic_filter()
+{
+       return(&methods_ebcdic);
+}
+
+static int ebcdic_new(BIO *bi)
+{
+       EBCDIC_OUTBUFF *wbuf;
+
+       wbuf = (EBCDIC_OUTBUFF *)Malloc(sizeof(EBCDIC_OUTBUFF) + 1024);
+       wbuf->alloced = 1024;
+       wbuf->buff[0] = '\0';
+
+       bi->ptr=(char *)wbuf;
+       bi->init=1;
+       bi->flags=0;
+       return(1);
+}
+
+static int ebcdic_free(BIO *a)
+{
+       if (a == NULL) return(0);
+       if (a->ptr != NULL)
+               Free(a->ptr);
+       a->ptr=NULL;
+       a->init=0;
+       a->flags=0;
+       return(1);
+}
+       
+static int ebcdic_read(BIO *b, char *out, int outl)
+{
+       int ret=0;
+
+       if (out == NULL || outl == 0) return(0);
+       if (b->next_bio == NULL) return(0);
+
+       ret=BIO_read(b->next_bio,out,outl);
+       if (ret > 0)
+               ascii2ebcdic(out,out,ret);
+       return(ret);
+}
+
+static int ebcdic_write(BIO *b, char *in, int inl)
+{
+       EBCDIC_OUTBUFF *wbuf;
+       int ret=0;
+       int num;
+       unsigned char n;
+
+       if ((in == NULL) || (inl <= 0)) return(0);
+       if (b->next_bio == NULL) return(0);
+
+       wbuf=(EBCDIC_OUTBUFF *)b->ptr;
+
+       if (inl > (num = wbuf->alloced))
+       {
+               num = num + num;  /* double the size */
+               if (num < inl)
+                       num = inl;
+               Free(wbuf);
+               wbuf=(EBCDIC_OUTBUFF *)Malloc(sizeof(EBCDIC_OUTBUFF) + num);
+
+               wbuf->alloced = num;
+               wbuf->buff[0] = '\0';
+
+               b->ptr=(char *)wbuf;
+       }
+
+       ebcdic2ascii(wbuf->buff, in, inl);
+
+       ret=BIO_write(b->next_bio, wbuf->buff, inl);
+
+       return(ret);
+}
+
+static long ebcdic_ctrl(BIO *b, int cmd, long num, char *ptr)
+{
+       long ret;
+
+       if (b->next_bio == NULL) return(0);
+       switch (cmd)
+       {
+       case BIO_CTRL_DUP:
+               ret=0L;
+               break;
+       default:
+               ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+               break;
+       }
+       return(ret);
+}
+
+static int ebcdic_gets(BIO *bp, char *buf, int size)
+{
+       int i, ret;
+       if (bp->next_bio == NULL) return(0);
+/*     return(BIO_gets(bp->next_bio,buf,size));*/
+       for (i=0; i<size-1; ++i)
+       {
+               ret = ebcdic_read(bp,&buf[i],1);
+               if (ret <= 0)
+                       break;
+               else if (buf[i] == '\n')
+               {
+                       ++i;
+                       break;
+               }
+       }
+       if (i < size)
+               buf[i] = '\0';
+       return (ret < 0 && i == 0) ? ret : i;
+}
+
+static int ebcdic_puts(BIO *bp, char *str)
+{
+       if (bp->next_bio == NULL) return(0);
+       return ebcdic_write(bp, str, strlen(str));
+}
+#endif
+
+int MAIN(int, char **);
 
 int MAIN(int argc, char *argv[])
        {
        short port=PORT;
        char *CApath=NULL,*CAfile=NULL;
        char *context = NULL;
+       char *dhfile = NULL;
        int badop=0,bugs=0;
        int ret=1;
        int off=0;
-       int no_tmp_rsa=0,nocert=0;
+       int no_tmp_rsa=0,no_dhe=0,nocert=0;
        int state=0;
        SSL_METHOD *meth=NULL;
 #ifndef NO_DH
@@ -262,8 +427,9 @@ int MAIN(int argc, char *argv[])
        local_argv=argv;
 
        apps_startup();
-       s_quiet=0;
-       s_debug=0;
+#ifdef MONOLITH
+       s_server_init();
+#endif
 
        if (bio_err == NULL)
                bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
@@ -316,6 +482,11 @@ int MAIN(int argc, char *argv[])
                        if (--argc < 1) goto bad;
                        s_key_file= *(++argv);
                        }
+               else if (strcmp(*argv,"-dhparam") == 0)
+                       {
+                       if (--argc < 1) goto bad;
+                       dhfile = *(++argv);
+                       }
                else if (strcmp(*argv,"-dcert") == 0)
                        {
                        if (--argc < 1) goto bad;
@@ -362,12 +533,16 @@ int MAIN(int argc, char *argv[])
                        { hack=1; }
                else if (strcmp(*argv,"-state") == 0)
                        { state=1; }
+               else if (strcmp(*argv,"-crlf") == 0)
+                       { s_crlf=1; }
                else if (strcmp(*argv,"-quiet") == 0)
                        { s_quiet=1; }
                else if (strcmp(*argv,"-bugs") == 0)
                        { bugs=1; }
                else if (strcmp(*argv,"-no_tmp_rsa") == 0)
                        { no_tmp_rsa=1; }
+               else if (strcmp(*argv,"-no_dhe") == 0)
+                       { no_dhe=1; }
                else if (strcmp(*argv,"-www") == 0)
                        { www=1; }
                else if (strcmp(*argv,"-WWW") == 0)
@@ -406,6 +581,8 @@ bad:
                goto end;
                }
 
+       app_RAND_load_file(NULL, bio_err, 0);
+
        if (bio_s_out == NULL)
                {
                if (s_quiet && !s_debug)
@@ -430,7 +607,7 @@ bad:
                }
 
        SSL_load_error_strings();
-       SSLeay_add_ssl_algorithms();
+       OpenSSL_add_ssl_algorithms();
 
        ctx=SSL_CTX_new(meth);
        if (ctx == NULL)
@@ -470,21 +647,23 @@ bad:
                }
 
 #ifndef NO_DH
-       /* EAY EAY EAY evil hack */
-       dh=load_dh_param();
-       if (dh != NULL)
-               {
-               BIO_printf(bio_s_out,"Setting temp DH parameters\n");
-               }
-       else
+       if (!no_dhe)
                {
-               BIO_printf(bio_s_out,"Using default temp DH parameters\n");
-               dh=get_dh512();
-               }
-       BIO_flush(bio_s_out);
+               dh=load_dh_param(dhfile ? dhfile : s_cert_file);
+               if (dh != NULL)
+                       {
+                       BIO_printf(bio_s_out,"Setting temp DH parameters\n");
+                       }
+               else
+                       {
+                       BIO_printf(bio_s_out,"Using default temp DH parameters\n");
+                       dh=get_dh512();
+                       }
+               (void)BIO_flush(bio_s_out);
 
-       SSL_CTX_set_tmp_dh(ctx,dh);
-       DH_free(dh);
+               SSL_CTX_set_tmp_dh(ctx,dh);
+               DH_free(dh);
+               }
 #endif
        
        if (!set_cert_stuff(ctx,s_cert_file,s_key_file))
@@ -520,12 +699,17 @@ bad:
 #endif
 
        if (cipher != NULL)
-               SSL_CTX_set_cipher_list(ctx,cipher);
+               if(!SSL_CTX_set_cipher_list(ctx,cipher)) {
+               BIO_printf(bio_err,"error setting cipher list\n");
+               ERR_print_errors(bio_err);
+               goto end;
+       }
        SSL_CTX_set_verify(ctx,s_server_verify,verify_callback);
        SSL_CTX_set_session_id_context(ctx,(void*)&s_server_session_id_context,
                sizeof s_server_session_id_context);
 
-       SSL_CTX_set_client_CA_list(ctx,SSL_load_client_CA_file(CAfile));
+       if (CAfile != NULL)
+           SSL_CTX_set_client_CA_list(ctx,SSL_load_client_CA_file(CAfile));
 
        BIO_printf(bio_s_out,"ACCEPT\n");
        if (www)
@@ -578,6 +762,9 @@ static int sv_body(char *hostname, int s, unsigned char *context)
        unsigned long l;
        SSL *con=NULL;
        BIO *sbio;
+#ifdef WINDOWS
+       struct timeval tv;
+#endif
 
        if ((buf=Malloc(bufsize)) == NULL)
                {
@@ -597,7 +784,7 @@ static int sv_body(char *hostname, int s, unsigned char *context)
 #endif
 
        if (con == NULL) {
-               con=(SSL *)SSL_new(ctx);
+               con=SSL_new(ctx);
                if(context)
                      SSL_set_session_id_context(con, context,
                                                 strlen((char *)context));
@@ -626,22 +813,72 @@ static int sv_body(char *hostname, int s, unsigned char *context)
        width=s+1;
        for (;;)
                {
-               FD_ZERO(&readfds);
+               int read_from_terminal;
+               int read_from_sslcon;
+
+               read_from_terminal = 0;
+               read_from_sslcon = SSL_pending(con);
+
+               if (!read_from_sslcon)
+                       {
+                       FD_ZERO(&readfds);
 #ifndef WINDOWS
-               FD_SET(fileno(stdin),&readfds);
+                       FD_SET(fileno(stdin),&readfds);
 #endif
-               FD_SET(s,&readfds);
-               /* Note: under VMS with SOCKETSHR the second parameter is
-                * currently of type (int *) whereas under other systems
-                * it is (void *) if you don't have a cast it will choke
-                * the compiler: if you do have a cast then you can either
-                * go for (int *) or (void *).
-                */
-               i=select(width,(void *)&readfds,NULL,NULL,NULL);
-               if (i <= 0) continue;
-               if (FD_ISSET(fileno(stdin),&readfds))
+                       FD_SET(s,&readfds);
+                       /* Note: under VMS with SOCKETSHR the second parameter is
+                        * currently of type (int *) whereas under other systems
+                        * it is (void *) if you don't have a cast it will choke
+                        * the compiler: if you do have a cast then you can either
+                        * go for (int *) or (void *).
+                        */
+#ifdef WINDOWS
+                       /* Under Windows we can't select on stdin: only
+                        * on sockets. As a workaround we timeout the select every
+                        * second and check for any keypress. In a proper Windows
+                        * application we wouldn't do this because it is inefficient.
+                        */
+                       tv.tv_sec = 1;
+                       tv.tv_usec = 0;
+                       i=select(width,(void *)&readfds,NULL,NULL,&tv);
+                       if((i < 0) || (!i && !_kbhit() ) )continue;
+                       if(_kbhit())
+                               read_from_terminal = 1;
+#else
+                       i=select(width,(void *)&readfds,NULL,NULL,NULL);
+                       if (i <= 0) continue;
+                       if (FD_ISSET(fileno(stdin),&readfds))
+                               read_from_terminal = 1;
+#endif
+                       if (FD_ISSET(s,&readfds))
+                               read_from_sslcon = 1;
+                       }
+               if (read_from_terminal)
                        {
-                       i=read(fileno(stdin),buf,bufsize);
+                       if (s_crlf)
+                               {
+                               int j, lf_num;
+
+                               i=read(fileno(stdin), buf, bufsize/2);
+                               lf_num = 0;
+                               /* both loops are skipped when i <= 0 */
+                               for (j = 0; j < i; j++)
+                                       if (buf[j] == '\n')
+                                               lf_num++;
+                               for (j = i-1; j >= 0; j--)
+                                       {
+                                       buf[j+lf_num] = buf[j];
+                                       if (buf[j] == '\n')
+                                               {
+                                               lf_num--;
+                                               i++;
+                                               buf[j+lf_num] = '\r';
+                                               }
+                                       }
+                               assert(lf_num == 0);
+                               }
+                       else
+                               i=read(fileno(stdin),buf,bufsize);
                        if (!s_quiet)
                                {
                                if ((i <= 0) || (buf[0] == 'Q'))
@@ -692,6 +929,9 @@ static int sv_body(char *hostname, int s, unsigned char *context)
                                        print_stats(bio_s_out,SSL_get_SSL_CTX(con));
                                        }
                                }
+#ifdef CHARSET_EBCDIC
+                       ebcdic2ascii(buf,buf,i);
+#endif
                        l=k=0;
                        for (;;)
                                {
@@ -726,7 +966,7 @@ static int sv_body(char *hostname, int s, unsigned char *context)
                                if (i <= 0) break;
                                }
                        }
-               if (FD_ISSET(s,&readfds))
+               if (read_from_sslcon)
                        {
                        if (!SSL_is_init_finished(con))
                                {
@@ -750,6 +990,9 @@ again:
                                switch (SSL_get_error(con,i))
                                        {
                                case SSL_ERROR_NONE:
+#ifdef CHARSET_EBCDIC
+                                       ascii2ebcdic(buf,buf,i);
+#endif
                                        write(fileno(stdout),buf,
                                                (unsigned int)i);
                                        if (SSL_pending(con)) goto again;
@@ -856,14 +1099,14 @@ static int init_ssl_connection(SSL *con)
        }
 
 #ifndef NO_DH
-static DH *load_dh_param(void)
+static DH *load_dh_param(char *dhfile)
        {
        DH *ret=NULL;
        BIO *bio;
 
-       if ((bio=BIO_new_file(DH_PARAM,"r")) == NULL)
+       if ((bio=BIO_new_file(dhfile,"r")) == NULL)
                goto err;
-       ret=PEM_read_bio_DHparams(bio,NULL,NULL);
+       ret=PEM_read_bio_DHparams(bio,NULL,NULL,NULL);
 err:
        if (bio != NULL) BIO_free(bio);
        return(ret);
@@ -923,7 +1166,7 @@ static int www_body(char *hostname, int s, unsigned char *context)
        /* lets make the output buffer a reasonable size */
        if (!BIO_set_write_buffer_size(io,bufsize)) goto err;
 
-       if ((con=(SSL *)SSL_new(ctx)) == NULL) goto err;
+       if ((con=SSL_new(ctx)) == NULL) goto err;
        if(context) SSL_set_session_id_context(con, context,
                                               strlen((char *)context));
 
@@ -941,6 +1184,9 @@ static int www_body(char *hostname, int s, unsigned char *context)
        /* SSL_set_fd(con,s); */
        BIO_set_ssl(ssl_bio,con,BIO_CLOSE);
        BIO_push(io,ssl_bio);
+#ifdef CHARSET_EBCDIC
+       io = BIO_push(BIO_new(BIO_f_ebcdic_filter()),io);
+#endif
 
        if (s_debug)
                {
@@ -1010,7 +1256,7 @@ static int www_body(char *hostname, int s, unsigned char *context)
                        static char *space="                          ";
 
                        BIO_puts(io,"HTTP/1.0 200 ok\r\nContent-type: text/html\r\n\r\n");
-                       BIO_puts(io,"<HTML><BODY BGCOLOR=ffffff>\n");
+                       BIO_puts(io,"<HTML><BODY BGCOLOR=\"#ffffff\">\n");
                        BIO_puts(io,"<pre>\n");
 /*                     BIO_puts(io,SSLeay_version(SSLEAY_VERSION));*/
                        BIO_puts(io,"\n");
@@ -1082,7 +1328,7 @@ static int www_body(char *hostname, int s, unsigned char *context)
                        BIO_puts(io,"</BODY></HTML>\r\n\r\n");
                        break;
                        }
-               else if ((www == 2) && (strncmp("GET ",buf,4) == 0))
+               else if ((www == 2) && (strncmp("GET /",buf,5) == 0))
                        {
                        BIO *file;
                        char *p,*e;
@@ -1218,7 +1464,7 @@ end:
        /* make sure we re-use sessions */
        SSL_set_shutdown(con,SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 #else
-       /* This kills performace */
+       /* This kills performance */
 /*     SSL_shutdown(con); A shutdown gets sent in the
  *     BIO_free_all(io) procession */
 #endif
@@ -1235,7 +1481,7 @@ err:
        }
 
 #ifndef NO_RSA
-static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int export, int keylength)
+static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength)
        {
        static RSA *rsa_tmp=NULL;
 
@@ -1244,13 +1490,13 @@ static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int export, int keylength)
                if (!s_quiet)
                        {
                        BIO_printf(bio_err,"Generating temp (%d bit) RSA key...",keylength);
-                       BIO_flush(bio_err);
+                       (void)BIO_flush(bio_err);
                        }
                rsa_tmp=RSA_generate_key(keylength,RSA_F4,NULL,NULL);
                if (!s_quiet)
                        {
                        BIO_printf(bio_err,"\n");
-                       BIO_flush(bio_err);
+                       (void)BIO_flush(bio_err);
                        }
                }
        return(rsa_tmp);