Initial import

1 files changed, 724 insertions, 0 deletions

diff --git a/openssl/apps/enc.c b/openssl/apps/enc.c
new file mode 100644
index 00000000..076225c4
--- /dev/null
+++ b/openssl/apps/enc.c
@@ -0,0 +1,724 @@
+/* apps/enc.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "apps.h"
+#include <openssl/bio.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include <openssl/x509.h>
+#include <openssl/rand.h>
+#include <openssl/pem.h>
+#include <openssl/comp.h>
+#include <ctype.h>
+
+int set_hex(char *in,unsigned char *out,int size);
+#undef SIZE
+#undef BSIZE
+#undef PROG
+
+#define SIZE	(512)
+#define BSIZE	(8*1024)
+#define	PROG	enc_main
+
+static void show_ciphers(const OBJ_NAME *name,void *bio_)
+	{
+	BIO *bio=bio_;
+	static int n;
+
+	if(!islower((unsigned char)*name->name))
+		return;
+
+	BIO_printf(bio,"-%-25s",name->name);
+	if(++n == 3)
+		{
+		BIO_printf(bio,"\n");
+		n=0;
+		}
+	else
+		BIO_printf(bio," ");
+	}
+
+int MAIN(int, char **);
+
+int MAIN(int argc, char **argv)
+	{
+	static const char magic[]="Salted__";
+	char mbuf[sizeof magic-1];
+	char *strbuf=NULL;
+	unsigned char *buff=NULL,*bufsize=NULL;
+	int bsize=BSIZE,verbose=0;
+	int ret=1,inl;
+	int nopad = 0;
+	unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
+	unsigned char salt[PKCS5_SALT_LEN];
+	char *str=NULL, *passarg = NULL, *pass = NULL;
+	char *hkey=NULL,*hiv=NULL,*hsalt = NULL;
+	char *md=NULL;
+	int enc=1,printkey=0,i,base64=0;
+#ifdef ZLIB
+	int do_zlib=0;
+	BIO *bzl = NULL;
+#endif
+	int debug=0,olb64=0,nosalt=0;
+	const EVP_CIPHER *cipher=NULL,*c;
+	EVP_CIPHER_CTX *ctx = NULL;
+	char *inf=NULL,*outf=NULL;
+	BIO *in=NULL,*out=NULL,*b64=NULL,*benc=NULL,*rbio=NULL,*wbio=NULL;
+#define PROG_NAME_SIZE  39
+	char pname[PROG_NAME_SIZE+1];
+#ifndef OPENSSL_NO_ENGINE
+	char *engine = NULL;
+#endif
+	const EVP_MD *dgst=NULL;
+
+	apps_startup();
+
+	if (bio_err == NULL)
+		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
+			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
+
+	if (!load_config(bio_err, NULL))
+		goto end;
+
+	/* first check the program name */
+	program_name(argv[0],pname,sizeof pname);
+	if (strcmp(pname,"base64") == 0)
+		base64=1;
+#ifdef ZLIB
+	if (strcmp(pname,"zlib") == 0)
+		do_zlib=1;
+#endif
+
+	cipher=EVP_get_cipherbyname(pname);
+#ifdef ZLIB
+	if (!do_zlib && !base64 && (cipher == NULL)
+				&& (strcmp(pname,"enc") != 0))
+#else
+	if (!base64 && (cipher == NULL) && (strcmp(pname,"enc") != 0))
+#endif
+		{
+		BIO_printf(bio_err,"%s is an unknown cipher\n",pname);
+		goto bad;
+		}
+
+	argc--;
+	argv++;
+	while (argc >= 1)
+		{
+		if	(strcmp(*argv,"-e") == 0)
+			enc=1;
+		else if (strcmp(*argv,"-in") == 0)
+			{
+			if (--argc < 1) goto bad;
+			inf= *(++argv);
+			}
+		else if (strcmp(*argv,"-out") == 0)
+			{
+			if (--argc < 1) goto bad;
+			outf= *(++argv);
+			}
+		else if (strcmp(*argv,"-pass") == 0)
+			{
+			if (--argc < 1) goto bad;
+			passarg= *(++argv);
+			}
+#ifndef OPENSSL_NO_ENGINE
+		else if (strcmp(*argv,"-engine") == 0)
+			{
+			if (--argc < 1) goto bad;
+			engine= *(++argv);
+			}
+#endif
+		else if	(strcmp(*argv,"-d") == 0)
+			enc=0;
+		else if	(strcmp(*argv,"-p") == 0)
+			printkey=1;
+		else if	(strcmp(*argv,"-v") == 0)
+			verbose=1;
+		else if	(strcmp(*argv,"-nopad") == 0)
+			nopad=1;
+		else if	(strcmp(*argv,"-salt") == 0)
+			nosalt=0;
+		else if	(strcmp(*argv,"-nosalt") == 0)
+			nosalt=1;
+		else if	(strcmp(*argv,"-debug") == 0)
+			debug=1;
+		else if	(strcmp(*argv,"-P") == 0)
+			printkey=2;
+		else if	(strcmp(*argv,"-A") == 0)
+			olb64=1;
+		else if	(strcmp(*argv,"-a") == 0)
+			base64=1;
+		else if	(strcmp(*argv,"-base64") == 0)
+			base64=1;
+#ifdef ZLIB
+		else if	(strcmp(*argv,"-z") == 0)
+			do_zlib=1;
+#endif
+		else if (strcmp(*argv,"-bufsize") == 0)
+			{
+			if (--argc < 1) goto bad;
+			bufsize=(unsigned char *)*(++argv);
+			}
+		else if (strcmp(*argv,"-k") == 0)
+			{
+			if (--argc < 1) goto bad;
+			str= *(++argv);
+			}
+		else if (strcmp(*argv,"-kfile") == 0)
+			{
+			static char buf[128];
+			FILE *infile;
+			char *file;
+
+			if (--argc < 1) goto bad;
+			file= *(++argv);
+			infile=fopen(file,"r");
+			if (infile == NULL)
+				{
+				BIO_printf(bio_err,"unable to read key from '%s'\n",
+					file);
+				goto bad;
+				}
+			buf[0]='\0';
+			if (!fgets(buf,sizeof buf,infile))
+				{
+				BIO_printf(bio_err,"unable to read key from '%s'\n",
+					file);
+				goto bad;
+				}
+			fclose(infile);
+			i=strlen(buf);
+			if ((i > 0) &&
+				((buf[i-1] == '\n') || (buf[i-1] == '\r')))
+				buf[--i]='\0';
+			if ((i > 0) &&
+				((buf[i-1] == '\n') || (buf[i-1] == '\r')))
+				buf[--i]='\0';
+			if (i < 1)
+				{
+				BIO_printf(bio_err,"zero length password\n");
+				goto bad;
+				}
+			str=buf;
+			}
+		else if (strcmp(*argv,"-K") == 0)
+			{
+			if (--argc < 1) goto bad;
+			hkey= *(++argv);
+			}
+		else if (strcmp(*argv,"-S") == 0)
+			{
+			if (--argc < 1) goto bad;
+			hsalt= *(++argv);
+			}
+		else if (strcmp(*argv,"-iv") == 0)
+			{
+			if (--argc < 1) goto bad;
+			hiv= *(++argv);
+			}
+		else if (strcmp(*argv,"-md") == 0)
+			{
+			if (--argc < 1) goto bad;
+			md= *(++argv);
+			}
+		else if	((argv[0][0] == '-') &&
+			((c=EVP_get_cipherbyname(&(argv[0][1]))) != NULL))
+			{
+			cipher=c;
+			}
+		else if (strcmp(*argv,"-none") == 0)
+			cipher=NULL;
+		else
+			{
+			BIO_printf(bio_err,"unknown option '%s'\n",*argv);
+bad:
+			BIO_printf(bio_err,"options are\n");
+			BIO_printf(bio_err,"%-14s input file\n","-in <file>");
+			BIO_printf(bio_err,"%-14s output file\n","-out <file>");
+			BIO_printf(bio_err,"%-14s pass phrase source\n","-pass <arg>");
+			BIO_printf(bio_err,"%-14s encrypt\n","-e");
+			BIO_printf(bio_err,"%-14s decrypt\n","-d");
+			BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
+			BIO_printf(bio_err,"%-14s passphrase is the next argument\n","-k");
+			BIO_printf(bio_err,"%-14s passphrase is the first line of the file argument\n","-kfile");
+			BIO_printf(bio_err,"%-14s the next argument is the md to use to create a key\n","-md");
+			BIO_printf(bio_err,"%-14s   from a passphrase.  One of md2, md5, sha or sha1\n","");
+			BIO_printf(bio_err,"%-14s salt in hex is the next argument\n","-S");
+			BIO_printf(bio_err,"%-14s key/iv in hex is the next argument\n","-K/-iv");
+			BIO_printf(bio_err,"%-14s print the iv/key (then exit if -P)\n","-[pP]");
+			BIO_printf(bio_err,"%-14s buffer size\n","-bufsize <n>");
+			BIO_printf(bio_err,"%-14s disable standard block padding\n","-nopad");
+#ifndef OPENSSL_NO_ENGINE
+			BIO_printf(bio_err,"%-14s use engine e, possibly a hardware device.\n","-engine e");
+#endif
+
+			BIO_printf(bio_err,"Cipher Types\n");
+			OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
+					       show_ciphers,
+					       bio_err);
+			BIO_printf(bio_err,"\n");
+
+			goto end;
+			}
+		argc--;
+		argv++;
+		}
+
+#ifndef OPENSSL_NO_ENGINE
+        setup_engine(bio_err, engine, 0);
+#endif
+
+	if (md && (dgst=EVP_get_digestbyname(md)) == NULL)
+		{
+		BIO_printf(bio_err,"%s is an unsupported message digest type\n",md);
+		goto end;
+		}
+
+	if (dgst == NULL)
+		{
+		dgst = EVP_md5();
+		}
+
+	if (bufsize != NULL)
+		{
+		unsigned long n;
+
+		for (n=0; *bufsize; bufsize++)
+			{
+			i= *bufsize;
+			if ((i <= '9') && (i >= '0'))
+				n=n*10+i-'0';
+			else if (i == 'k')
+				{
+				n*=1024;
+				bufsize++;
+				break;
+				}
+			}
+		if (*bufsize != '\0')
+			{
+			BIO_printf(bio_err,"invalid 'bufsize' specified.\n");
+			goto end;
+			}
+
+		/* It must be large enough for a base64 encoded line */
+		if (base64 && n < 80) n=80;
+
+		bsize=(int)n;
+		if (verbose) BIO_printf(bio_err,"bufsize=%d\n",bsize);
+		}
+
+	strbuf=OPENSSL_malloc(SIZE);
+	buff=(unsigned char *)OPENSSL_malloc(EVP_ENCODE_LENGTH(bsize));
+	if ((buff == NULL) || (strbuf == NULL))
+		{
+		BIO_printf(bio_err,"OPENSSL_malloc failure %ld\n",(long)EVP_ENCODE_LENGTH(bsize));
+		goto end;
+		}
+
+	in=BIO_new(BIO_s_file());
+	out=BIO_new(BIO_s_file());
+	if ((in == NULL) || (out == NULL))
+		{
+		ERR_print_errors(bio_err);
+		goto end;
+		}
+	if (debug)
+		{
+		BIO_set_callback(in,BIO_debug_callback);
+		BIO_set_callback(out,BIO_debug_callback);
+		BIO_set_callback_arg(in,(char *)bio_err);
+		BIO_set_callback_arg(out,(char *)bio_err);
+		}
+
+	if (inf == NULL)
+	        {
+#ifndef OPENSSL_NO_SETVBUF_IONBF
+		if (bufsize != NULL)
+			setvbuf(stdin, (char *)NULL, _IONBF, 0);
+#endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
+		BIO_set_fp(in,stdin,BIO_NOCLOSE);
+	        }
+	else
+		{
+		if (BIO_read_filename(in,inf) <= 0)
+			{
+			perror(inf);
+			goto end;
+			}
+		}
+
+	if(!str && passarg) {
+		if(!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
+			BIO_printf(bio_err, "Error getting password\n");
+			goto end;
+		}
+		str = pass;
+	}
+
+	if ((str == NULL) && (cipher != NULL) && (hkey == NULL))
+		{
+		for (;;)
+			{
+			char buf[200];
+
+			BIO_snprintf(buf,sizeof buf,"enter %s %s password:",
+				     OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
+				     (enc)?"encryption":"decryption");
+			strbuf[0]='\0';
+			i=EVP_read_pw_string((char *)strbuf,SIZE,buf,enc);
+			if (i == 0)
+				{
+				if (strbuf[0] == '\0')
+					{
+					ret=1;
+					goto end;
+					}
+				str=strbuf;
+				break;
+				}
+			if (i < 0)
+				{
+				BIO_printf(bio_err,"bad password read\n");
+				goto end;
+				}
+			}
+		}
+
+
+	if (outf == NULL)
+		{
+		BIO_set_fp(out,stdout,BIO_NOCLOSE);
+#ifndef OPENSSL_NO_SETVBUF_IONBF
+		if (bufsize != NULL)
+			setvbuf(stdout, (char *)NULL, _IONBF, 0);
+#endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
+#ifdef OPENSSL_SYS_VMS
+		{
+		BIO *tmpbio = BIO_new(BIO_f_linebuffer());
+		out = BIO_push(tmpbio, out);
+		}
+#endif
+		}
+	else
+		{
+		if (BIO_write_filename(out,outf) <= 0)
+			{
+			perror(outf);
+			goto end;
+			}
+		}
+
+	rbio=in;
+	wbio=out;
+
+#ifdef ZLIB
+
+	if (do_zlib)
+		{
+		if ((bzl=BIO_new(BIO_f_zlib())) == NULL)
+			goto end;
+		if (enc)
+			wbio=BIO_push(bzl,wbio);
+		else
+			rbio=BIO_push(bzl,rbio);
+		}
+#endif
+
+	if (base64)
+		{
+		if ((b64=BIO_new(BIO_f_base64())) == NULL)
+			goto end;
+		if (debug)
+			{
+			BIO_set_callback(b64,BIO_debug_callback);
+			BIO_set_callback_arg(b64,(char *)bio_err);
+			}
+		if (olb64)
+			BIO_set_flags(b64,BIO_FLAGS_BASE64_NO_NL);
+		if (enc)
+			wbio=BIO_push(b64,wbio);
+		else
+			rbio=BIO_push(b64,rbio);
+		}
+
+	if (cipher != NULL)
+		{
+		/* Note that str is NULL if a key was passed on the command
+		 * line, so we get no salt in that case. Is this a bug?
+		 */
+		if (str != NULL)
+			{
+			/* Salt handling: if encrypting generate a salt and
+			 * write to output BIO. If decrypting read salt from
+			 * input BIO.
+			 */
+			unsigned char *sptr;
+			if(nosalt) sptr = NULL;
+			else {
+				if(enc) {
+					if(hsalt) {
+						if(!set_hex(hsalt,salt,sizeof salt)) {
+							BIO_printf(bio_err,
+								"invalid hex salt value\n");
+							goto end;
+						}
+					} else if (RAND_pseudo_bytes(salt, sizeof salt) < 0)
+						goto end;
+					/* If -P option then don't bother writing */
+					if((printkey != 2)
+					   && (BIO_write(wbio,magic,
+							 sizeof magic-1) != sizeof magic-1
+					       || BIO_write(wbio,
+							    (char *)salt,
+							    sizeof salt) != sizeof salt)) {
+						BIO_printf(bio_err,"error writing output file\n");
+						goto end;
+					}
+				} else if(BIO_read(rbio,mbuf,sizeof mbuf) != sizeof mbuf
+					  || BIO_read(rbio,
+						      (unsigned char *)salt,
+				    sizeof salt) != sizeof salt) {
+					BIO_printf(bio_err,"error reading input file\n");
+					goto end;
+				} else if(memcmp(mbuf,magic,sizeof magic-1)) {
+				    BIO_printf(bio_err,"bad magic number\n");
+				    goto end;
+				}
+
+				sptr = salt;
+			}
+
+			EVP_BytesToKey(cipher,dgst,sptr,
+				(unsigned char *)str,
+				strlen(str),1,key,iv);
+			/* zero the complete buffer or the string
+			 * passed from the command line
+			 * bug picked up by
+			 * Larry J. Hughes Jr. <hughes@indiana.edu> */
+			if (str == strbuf)
+				OPENSSL_cleanse(str,SIZE);
+			else
+				OPENSSL_cleanse(str,strlen(str));
+			}
+		if ((hiv != NULL) && !set_hex(hiv,iv,sizeof iv))
+			{
+			BIO_printf(bio_err,"invalid hex iv value\n");
+			goto end;
+			}
+		if ((hiv == NULL) && (str == NULL)
+		    && EVP_CIPHER_iv_length(cipher) != 0)
+			{
+			/* No IV was explicitly set and no IV was generated
+			 * during EVP_BytesToKey. Hence the IV is undefined,
+			 * making correct decryption impossible. */
+			BIO_printf(bio_err, "iv undefined\n");
+			goto end;
+			}
+		if ((hkey != NULL) && !set_hex(hkey,key,sizeof key))
+			{
+			BIO_printf(bio_err,"invalid hex key value\n");
+			goto end;
+			}
+
+		if ((benc=BIO_new(BIO_f_cipher())) == NULL)
+			goto end;
+
+		/* Since we may be changing parameters work on the encryption
+		 * context rather than calling BIO_set_cipher().
+		 */
+
+		BIO_get_cipher_ctx(benc, &ctx);
+		if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc))
+			{
+			BIO_printf(bio_err, "Error setting cipher %s\n",
+				EVP_CIPHER_name(cipher));
+			ERR_print_errors(bio_err);
+			goto end;
+			}
+
+		if (nopad)
+			EVP_CIPHER_CTX_set_padding(ctx, 0);
+
+		if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc))
+			{
+			BIO_printf(bio_err, "Error setting cipher %s\n",
+				EVP_CIPHER_name(cipher));
+			ERR_print_errors(bio_err);
+			goto end;
+			}
+
+		if (debug)
+			{
+			BIO_set_callback(benc,BIO_debug_callback);
+			BIO_set_callback_arg(benc,(char *)bio_err);
+			}
+
+		if (printkey)
+			{
+			if (!nosalt)
+				{
+				printf("salt=");
+				for (i=0; i<(int)sizeof(salt); i++)
+					printf("%02X",salt[i]);
+				printf("\n");
+				}
+			if (cipher->key_len > 0)
+				{
+				printf("key=");
+				for (i=0; i<cipher->key_len; i++)
+					printf("%02X",key[i]);
+				printf("\n");
+				}
+			if (cipher->iv_len > 0)
+				{
+				printf("iv =");
+				for (i=0; i<cipher->iv_len; i++)
+					printf("%02X",iv[i]);
+				printf("\n");
+				}
+			if (printkey == 2)
+				{
+				ret=0;
+				goto end;
+				}
+			}
+		}
+
+	/* Only encrypt/decrypt as we write the file */
+	if (benc != NULL)
+		wbio=BIO_push(benc,wbio);
+
+	for (;;)
+		{
+		inl=BIO_read(rbio,(char *)buff,bsize);
+		if (inl <= 0) break;
+		if (BIO_write(wbio,(char *)buff,inl) != inl)
+			{
+			BIO_printf(bio_err,"error writing output file\n");
+			goto end;
+			}
+		}
+	if (!BIO_flush(wbio))
+		{
+		BIO_printf(bio_err,"bad decrypt\n");
+		goto end;
+		}
+
+	ret=0;
+	if (verbose)
+		{
+		BIO_printf(bio_err,"bytes read   :%8ld\n",BIO_number_read(in));
+		BIO_printf(bio_err,"bytes written:%8ld\n",BIO_number_written(out));
+		}
+end:
+	ERR_print_errors(bio_err);
+	if (strbuf != NULL) OPENSSL_free(strbuf);
+	if (buff != NULL) OPENSSL_free(buff);
+	if (in != NULL) BIO_free(in);
+	if (out != NULL) BIO_free_all(out);
+	if (benc != NULL) BIO_free(benc);
+	if (b64 != NULL) BIO_free(b64);
+#ifdef ZLIB
+	if (bzl != NULL) BIO_free(bzl);
+#endif
+	if(pass) OPENSSL_free(pass);
+	apps_shutdown();
+	OPENSSL_EXIT(ret);
+	}
+
+int set_hex(char *in, unsigned char *out, int size)
+	{
+	int i,n;
+	unsigned char j;
+
+	n=strlen(in);
+	if (n > (size*2))
+		{
+		BIO_printf(bio_err,"hex string is too long\n");
+		return(0);
+		}
+	memset(out,0,size);
+	for (i=0; i<n; i++)
+		{
+		j=(unsigned char)*in;
+		*(in++)='\0';
+		if (j == 0) break;
+		if ((j >= '0') && (j <= '9'))
+			j-='0';
+		else if ((j >= 'A') && (j <= 'F'))
+			j=j-'A'+10;
+		else if ((j >= 'a') && (j <= 'f'))
+			j=j-'a'+10;
+		else
+			{
+			BIO_printf(bio_err,"non-hex digit\n");
+			return(0);
+			}
+		if (i&1)
+			out[i/2]|=j;
+		else
+			out[i/2]=(j<<4);
+		}
+	return(1);
+	}