Convert the openssl(1) enc command to the new option parsing and usage.

With input from doug@

1 files changed, 382 insertions, 250 deletions

diff --git a/usr.bin/openssl/enc.c b/usr.bin/openssl/enc.c
index b5aaab9842d..e449ac8cc78 100644
--- a/usr.bin/openssl/enc.c
+++ b/usr.bin/openssl/enc.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: enc.c,v 1.3 2014/10/22 13:54:03 jsing Exp $ */
+/* $OpenBSD: enc.c,v 1.4 2015/01/01 13:55:03 jsing Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -75,23 +75,257 @@ int set_hex(char *in, unsigned char *out, int size);
 
 #define SIZE	(512)
 #define BSIZE	(8*1024)
-#define	PROG	enc_main
+
+static struct {
+	int base64;
+	char *bufsize;
+	const EVP_CIPHER *cipher;
+	int debug;
+#ifdef ZLIB
+	int do_zlib;
+#endif
+	int enc;
+#ifndef OPENSSL_NO_ENGINE
+	char *engine;
+#endif
+	char *hiv;
+	char *hkey;
+	char *hsalt;
+	char *inf;
+	char *keyfile;
+	char *keystr;
+	char *md;
+	int nopad;
+	int nosalt;
+	int olb64;
+	char *outf;
+	char *passarg;
+	int printkey;
+	int verbose;
+} enc_config;
+
+static int
+enc_opt_cipher(int argc, char **argv, int *argsused)
+{
+	char *name = argv[0];
+
+	if (*name++ != '-')
+		return (1);
+
+	if (strcmp(name, "none") == 0) {
+		enc_config.cipher = NULL;
+		*argsused = 1;
+		return (0);
+	}
+
+	if ((enc_config.cipher = EVP_get_cipherbyname(name)) != NULL) {
+		*argsused = 1;
+		return (0);
+	}
+
+	return (1);
+}
+
+static struct option enc_options[] = {
+	{
+		.name = "A",
+		.desc = "Process base64 data on one line (requires -a)",
+		.type = OPTION_FLAG,
+		.opt.flag = &enc_config.olb64,
+	},
+	{
+		.name = "a",
+		.desc = "Perform base64 encoding/decoding (alias -base64)",
+		.type = OPTION_FLAG,
+		.opt.flag = &enc_config.base64,
+	},
+	{
+		.name = "base64",
+		.type = OPTION_FLAG,
+		.opt.flag = &enc_config.base64,
+	},
+	{
+		.name = "bufsize",
+		.argname = "size",
+		.desc = "Specify the buffer size to use for I/O",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.bufsize,
+	},
+	{
+		.name = "d",
+		.desc = "Decrypt the input data",
+		.type = OPTION_VALUE,
+		.opt.value = &enc_config.enc,
+		.value = 0,
+	},
+	{
+		.name = "debug",
+		.desc = "Print debugging information",
+		.type = OPTION_FLAG,
+		.opt.flag = &enc_config.debug,
+	},
+	{
+		.name = "e",
+		.desc = "Encrypt the input data (default)",
+		.type = OPTION_VALUE,
+		.opt.value = &enc_config.enc,
+		.value = 1,
+	},
+#ifndef OPENSSL_NO_ENGINE
+	{
+		.name = "engine",
+		.argname = "id",
+		.desc = "Use the engine specified by the given identifier",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.engine,
+	},
+#endif
+	{
+		.name = "in",
+		.argname = "file",
+		.desc = "Input file to read from (default stdin)",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.inf,
+	},
+	{
+		.name = "iv",
+		.argname = "IV",
+		.desc = "IV to use, specified as a hexidecimal string",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.hiv,
+	},
+	{
+		.name = "K",
+		.argname = "key",
+		.desc = "Key to use, specified as a hexidecimal string",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.hkey,
+	},
+	{
+		.name = "k",		/* Superseded by -pass. */
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.keystr,
+	},
+	{
+		.name = "kfile",	/* Superseded by -pass. */
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.keyfile,
+	},
+	{
+		.name = "md",
+		.argname = "digest",
+		.desc = "Digest to use to create a key from the passphrase",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.md,
+	},
+	{
+		.name = "none",
+		.desc = "Use NULL cipher (no encryption or decryption)",
+		.type = OPTION_ARGV_FUNC,
+		.opt.argvfunc = enc_opt_cipher,
+	},
+	{
+		.name = "nopad",
+		.desc = "Disable standard block padding",
+		.type = OPTION_FLAG,
+		.opt.flag = &enc_config.nopad,
+	},
+	{
+		.name = "nosalt",
+		.type = OPTION_VALUE,
+		.opt.value = &enc_config.nosalt,
+		.value = 1,
+	},
+	{
+		.name = "out",
+		.argname = "file",
+		.desc = "Output file to write to (default stdout)",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.outf,
+	},
+	{
+		.name = "P",
+		.desc = "Print out the salt, key and IV used, then exit\n"
+		    "  (no encryption or decryption is performed)",
+		.type = OPTION_VALUE,
+		.opt.value = &enc_config.printkey,
+		.value = 2,
+	},
+	{
+		.name = "p",
+		.desc = "Print out the salt, key and IV used",
+		.type = OPTION_VALUE,
+		.opt.value = &enc_config.printkey,
+		.value = 1,
+	},
+	{
+		.name = "pass",
+		.argname = "source",
+		.desc = "Password source",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.passarg,
+	},
+	{
+		.name = "S",
+		.argname = "salt",
+		.desc = "Salt to use, specified as a hexidecimal string",
+		.type = OPTION_ARG,
+		.opt.arg = &enc_config.hsalt,
+	},
+	{
+		.name = "salt",
+		.desc = "Use a salt in the key derivation routines (default)",
+		.type = OPTION_VALUE,
+		.opt.value = &enc_config.nosalt,
+		.value = 0,
+	},
+	{
+		.name = "v",
+		.desc = "Verbose",
+		.type = OPTION_FLAG,
+		.opt.flag = &enc_config.verbose,
+	},
+#ifdef ZLIB
+	{
+		.name = "z",
+		.desc = "Perform zlib compression/decompression",
+		.type = OPTION_FLAG,
+		.opt.flag = &enc_config.do_zlib,
+	},
+#endif
+	{
+		.name = NULL,
+		.type = OPTION_ARGV_FUNC,
+		.opt.argvfunc = enc_opt_cipher,
+	},
+	{ NULL },
+};
 
 static void
-show_ciphers(const OBJ_NAME * name, void *bio_)
+show_ciphers(const OBJ_NAME *name, void *arg)
 {
-	BIO *bio = bio_;
 	static int n;
 
-	if (!islower((unsigned char) *name->name))
+	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, " ");
+	fprintf(stderr, " -%-24s%s", name->name, (++n % 3 ? "" : "\n"));
+}
+
+static void
+enc_usage(void)
+{
+	fprintf(stderr, "usage: enc -ciphername [-AadePp] [-base64] "
+	    "[-bufsize number] [-debug]\n"
+	    "    [-engine id] [-in file] [-iv IV] [-K key] [-k password]\n"
+	    "    [-kfile file] [-md digest] [-none] [-nopad] [-nosalt]\n"
+	    "    [-out file] [-pass arg] [-S salt] [-salt]\n\n");
+	options_usage(enc_options);
+	fprintf(stderr, "\n");
+
+	fprintf(stderr, "Valid ciphername values:\n\n");
+	OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_ciphers, NULL);
+	fprintf(stderr, "\n");
 }
 
 int enc_main(int, char **);
@@ -101,237 +335,126 @@ enc_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;
+	char *strbuf = NULL, *pass = NULL;
+	unsigned char *buff = NULL;
+	int bsize = BSIZE;
 	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;
+	const EVP_MD *dgst = NULL;
+	BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL;
+	BIO *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;
+	int i;
+
+	memset(&enc_config, 0, sizeof(enc_config));
+	enc_config.enc = 1;
 
 	/* first check the program name */
-	program_name(argv[0], pname, sizeof pname);
+	program_name(argv[0], pname, sizeof(pname));
+
 	if (strcmp(pname, "base64") == 0)
-		base64 = 1;
+		enc_config.base64 = 1;
+
 #ifdef ZLIB
 	if (strcmp(pname, "zlib") == 0)
-		do_zlib = 1;
+		enc_config.do_zlib = 1;
 #endif
 
-	cipher = EVP_get_cipherbyname(pname);
+	enc_config.cipher = EVP_get_cipherbyname(pname);
+
 #ifdef ZLIB
-	if (!do_zlib && !base64 && (cipher == NULL)
-	    && (strcmp(pname, "enc") != 0))
+	if (!enc_config.do_zlib && !enc_config.base64 &&
+	    enc_config.cipher == NULL && strcmp(pname, "enc") != 0)
 #else
-	if (!base64 && (cipher == NULL) && (strcmp(pname, "enc") != 0))
+	if (!enc_config.base64 && enc_config.cipher == NULL &&
+	    strcmp(pname, "enc") != 0)
 #endif
 	{
 		BIO_printf(bio_err, "%s is an unknown cipher\n", pname);
-		goto bad;
+		goto end;
 	}
-	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);
-				fclose(infile);
-				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");
+	if (options_parse(argc, argv, enc_options, NULL, NULL) != 0) {
+		enc_usage();
+		goto end;
+	}
+
+	if (enc_config.keyfile != NULL) {
+		static char buf[128];
+		FILE *infile;
 
+		infile = fopen(enc_config.keyfile, "r");
+		if (infile == NULL) {
+			BIO_printf(bio_err, "unable to read key from '%s'\n",
+			    enc_config.keyfile);
+			goto end;
+		}
+		buf[0] = '\0';
+		if (!fgets(buf, sizeof buf, infile)) {
+			BIO_printf(bio_err, "unable to read key from '%s'\n",
+			    enc_config.keyfile);
+			fclose(infile);
 			goto end;
 		}
-		argc--;
-		argv++;
+		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 end;
+		}
+		enc_config.keystr = buf;
 	}
 
 #ifndef OPENSSL_NO_ENGINE
-	setup_engine(bio_err, engine, 0);
+	setup_engine(bio_err, enc_config.engine, 0);
 #endif
 
-	if (md && (dgst = EVP_get_digestbyname(md)) == NULL) {
-		BIO_printf(bio_err, "%s is an unsupported message digest type\n", md);
+	if (enc_config.md != NULL &&
+	    (dgst = EVP_get_digestbyname(enc_config.md)) == NULL) {
+		BIO_printf(bio_err,
+		    "%s is an unsupported message digest type\n",
+		    enc_config.md);
 		goto end;
 	}
 	if (dgst == NULL) {
-		dgst = EVP_md5();
+		dgst = EVP_md5();	/* XXX */
 	}
-	if (bufsize != NULL) {
+
+	if (enc_config.bufsize != NULL) {
+		char *p = enc_config.bufsize;
 		unsigned long n;
 
-		for (n = 0; *bufsize; bufsize++) {
-			i = *bufsize;
+		/* XXX - provide an OPTION_ARG_DISKUNIT. */
+		for (n = 0; *p != '\0'; p++) {
+			i = *p;
 			if ((i <= '9') && (i >= '0'))
 				n = n * 10 + i - '0';
 			else if (i == 'k') {
 				n *= 1024;
-				bufsize++;
+				p++;
 				break;
 			}
 		}
-		if (*bufsize != '\0') {
+		if (*p != '\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)
+		/* It must be large enough for a base64 encoded line. */
+		if (enc_config.base64 && n < 80)
 			n = 80;
 
-		bsize = (int) n;
-		if (verbose)
+		bsize = (int)n;
+		if (enc_config.verbose)
 			BIO_printf(bio_err, "bufsize=%d\n", bsize);
 	}
 	strbuf = malloc(SIZE);
@@ -346,50 +469,55 @@ enc_main(int argc, char **argv)
 		ERR_print_errors(bio_err);
 		goto end;
 	}
-	if (debug) {
+	if (enc_config.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) {
-		if (bufsize != NULL)
+	if (enc_config.inf == NULL) {
+		if (enc_config.bufsize != NULL)
 			setvbuf(stdin, (char *) NULL, _IONBF, 0);
 		BIO_set_fp(in, stdin, BIO_NOCLOSE);
 	} else {
-		if (BIO_read_filename(in, inf) <= 0) {
-			perror(inf);
+		if (BIO_read_filename(in, enc_config.inf) <= 0) {
+			perror(enc_config.inf);
 			goto end;
 		}
 	}
 
-	if (!str && passarg) {
-		if (!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
+	if (!enc_config.keystr && enc_config.passarg) {
+		if (!app_passwd(bio_err, enc_config.passarg, NULL,
+		    &pass, NULL)) {
 			BIO_printf(bio_err, "Error getting password\n");
 			goto end;
 		}
-		str = pass;
+		enc_config.keystr = pass;
 	}
-	if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
+	if (enc_config.keystr == NULL && enc_config.cipher != NULL &&
+	    enc_config.hkey == NULL) {
 		for (;;) {
 			char buf[200];
 			int retval;
 
-			retval = snprintf(buf, sizeof buf, "enter %s %s password:",
-			    OBJ_nid2ln(EVP_CIPHER_nid(cipher)),
-			    (enc) ? "encryption" : "decryption");
+			retval = snprintf(buf, sizeof buf,
+			    "enter %s %s password:",
+			    OBJ_nid2ln(EVP_CIPHER_nid(enc_config.cipher)),
+			    enc_config.enc ? "encryption" : "decryption");
 			if ((size_t)retval >= sizeof buf) {
-				BIO_printf(bio_err, "Password prompt too long\n");
+				BIO_printf(bio_err,
+				    "Password prompt too long\n");
 				goto end;
 			}
 			strbuf[0] = '\0';
-			i = EVP_read_pw_string((char *) strbuf, SIZE, buf, enc);
+			i = EVP_read_pw_string((char *)strbuf, SIZE, buf,
+			    enc_config.enc);
 			if (i == 0) {
 				if (strbuf[0] == '\0') {
 					ret = 1;
 					goto end;
 				}
-				str = strbuf;
+				enc_config.keystr = strbuf;
 				break;
 			}
 			if (i < 0) {
@@ -398,13 +526,13 @@ enc_main(int argc, char **argv)
 			}
 		}
 	}
-	if (outf == NULL) {
+	if (enc_config.outf == NULL) {
 		BIO_set_fp(out, stdout, BIO_NOCLOSE);
-		if (bufsize != NULL)
-			setvbuf(stdout, (char *) NULL, _IONBF, 0);
+		if (enc_config.bufsize != NULL)
+			setvbuf(stdout, (char *)NULL, _IONBF, 0);
 	} else {
-		if (BIO_write_filename(out, outf) <= 0) {
-			perror(outf);
+		if (BIO_write_filename(out, enc_config.outf) <= 0) {
+			perror(enc_config.outf);
 			goto end;
 		}
 	}
@@ -413,7 +541,6 @@ enc_main(int argc, char **argv)
 	wbio = out;
 
 #ifdef ZLIB
-
 	if (do_zlib) {
 		if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
 			goto end;
@@ -424,38 +551,38 @@ enc_main(int argc, char **argv)
 	}
 #endif
 
-	if (base64) {
+	if (enc_config.base64) {
 		if ((b64 = BIO_new(BIO_f_base64())) == NULL)
 			goto end;
-		if (debug) {
+		if (enc_config.debug) {
 			BIO_set_callback(b64, BIO_debug_callback);
 			BIO_set_callback_arg(b64, (char *) bio_err);
 		}
-		if (olb64)
+		if (enc_config.olb64)
 			BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
-		if (enc)
+		if (enc_config.enc)
 			wbio = BIO_push(b64, wbio);
 		else
 			rbio = BIO_push(b64, rbio);
 	}
-	if (cipher != NULL) {
+	if (enc_config.cipher != NULL) {
 		/*
-		 * Note that str is NULL if a key was passed on the command
+		 * Note that keystr 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) {
+		if (enc_config.keystr != 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)
+			if (enc_config.nosalt)
 				sptr = NULL;
 			else {
-				if (enc) {
-					if (hsalt) {
-						if (!set_hex(hsalt, salt, sizeof salt)) {
+				if (enc_config.enc) {
+					if (enc_config.hsalt) {
+						if (!set_hex(enc_config.hsalt, salt, sizeof salt)) {
 							BIO_printf(bio_err,
 							    "invalid hex salt value\n");
 							goto end;
@@ -467,7 +594,7 @@ enc_main(int argc, char **argv)
 					 * If -P option then don't bother
 					 * writing
 					 */
-					if ((printkey != 2)
+					if ((enc_config.printkey != 2)
 					    && (BIO_write(wbio, magic,
 						    sizeof magic - 1) != sizeof magic - 1
 						|| BIO_write(wbio,
@@ -489,25 +616,27 @@ enc_main(int argc, char **argv)
 				sptr = salt;
 			}
 
-			EVP_BytesToKey(cipher, dgst, sptr,
-			    (unsigned char *) str,
-			    strlen(str), 1, key, iv);
+			EVP_BytesToKey(enc_config.cipher, dgst, sptr,
+			    (unsigned char *)enc_config.keystr,
+			    strlen(enc_config.keystr), 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);
+			if (enc_config.keystr == strbuf)
+				OPENSSL_cleanse(enc_config.keystr, SIZE);
 			else
-				OPENSSL_cleanse(str, strlen(str));
+				OPENSSL_cleanse(enc_config.keystr,
+				    strlen(enc_config.keystr));
 		}
-		if ((hiv != NULL) && !set_hex(hiv, iv, sizeof iv)) {
+		if (enc_config.hiv != NULL &&
+		    !set_hex(enc_config.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) {
+		if (enc_config.hiv == NULL && enc_config.keystr == NULL &&
+		    EVP_CIPHER_iv_length(enc_config.cipher) != 0) {
 			/*
 			 * No IV was explicitly set and no IV was generated
 			 * during EVP_BytesToKey. Hence the IV is undefined,
@@ -516,7 +645,8 @@ enc_main(int argc, char **argv)
 			BIO_printf(bio_err, "iv undefined\n");
 			goto end;
 		}
-		if ((hkey != NULL) && !set_hex(hkey, key, sizeof key)) {
+		if (enc_config.hkey != NULL &&
+		    !set_hex(enc_config.hkey, key, sizeof key)) {
 			BIO_printf(bio_err, "invalid hex key value\n");
 			goto end;
 		}
@@ -530,45 +660,47 @@ enc_main(int argc, char **argv)
 
 		BIO_get_cipher_ctx(benc, &ctx);
 
-		if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)) {
+		if (!EVP_CipherInit_ex(ctx, enc_config.cipher, NULL, NULL,
+		    NULL, enc_config.enc)) {
 			BIO_printf(bio_err, "Error setting cipher %s\n",
-			    EVP_CIPHER_name(cipher));
+			    EVP_CIPHER_name(enc_config.cipher));
 			ERR_print_errors(bio_err);
 			goto end;
 		}
-		if (nopad)
+		if (enc_config.nopad)
 			EVP_CIPHER_CTX_set_padding(ctx, 0);
 
-		if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
+		if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv,
+		    enc_config.enc)) {
 			BIO_printf(bio_err, "Error setting cipher %s\n",
-			    EVP_CIPHER_name(cipher));
+			    EVP_CIPHER_name(enc_config.cipher));
 			ERR_print_errors(bio_err);
 			goto end;
 		}
-		if (debug) {
+		if (enc_config.debug) {
 			BIO_set_callback(benc, BIO_debug_callback);
 			BIO_set_callback_arg(benc, (char *) bio_err);
 		}
-		if (printkey) {
-			if (!nosalt) {
+		if (enc_config.printkey) {
+			if (!enc_config.nosalt) {
 				printf("salt=");
 				for (i = 0; i < (int) sizeof(salt); i++)
 					printf("%02X", salt[i]);
 				printf("\n");
 			}
-			if (cipher->key_len > 0) {
+			if (enc_config.cipher->key_len > 0) {
 				printf("key=");
-				for (i = 0; i < cipher->key_len; i++)
+				for (i = 0; i < enc_config.cipher->key_len; i++)
 					printf("%02X", key[i]);
 				printf("\n");
 			}
-			if (cipher->iv_len > 0) {
+			if (enc_config.cipher->iv_len > 0) {
 				printf("iv =");
-				for (i = 0; i < cipher->iv_len; i++)
+				for (i = 0; i < enc_config.cipher->iv_len; i++)
 					printf("%02X", iv[i]);
 				printf("\n");
 			}
-			if (printkey == 2) {
+			if (enc_config.printkey == 2) {
 				ret = 0;
 				goto end;
 			}
@@ -592,7 +724,7 @@ enc_main(int argc, char **argv)
 		goto end;
 	}
 	ret = 0;
-	if (verbose) {
+	if (enc_config.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));
 	}