Silence Clang warning about unit'd variable
[openssl.git] / apps / pkey.c
index 17e6702..875087f 100644 (file)
@@ -1,6 +1,6 @@
-/* apps/pkey.c */
-/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project 2006
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2006
  */
 /* ====================================================================
  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
@@ -10,7 +10,7 @@
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
+ *    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
 #include <openssl/err.h>
 #include <openssl/evp.h>
 
-#define PROG pkey_main
-
-int MAIN(int, char **);
-
-int MAIN(int argc, char **argv)
-       {
-       ENGINE *e = NULL;
-       char **args, *infile = NULL, *outfile = NULL;
-       char *passargin = NULL, *passargout = NULL;
-       BIO *in = NULL, *out = NULL;
-       const EVP_CIPHER *cipher = NULL;
-       int informat, outformat;
-       int pubin = 0, pubout = 0, pubtext = 0, text = 0, noout = 0;
-       EVP_PKEY *pkey=NULL;
-       char *passin = NULL, *passout = NULL;
-       int badarg = 0;
-#ifndef OPENSSL_NO_ENGINE
-       char *engine=NULL;
-#endif
-       int ret = 1;
-
-       if (bio_err == NULL)
-               bio_err = BIO_new_fp (stderr, BIO_NOCLOSE);
-
-       if (!load_config(bio_err, NULL))
-               goto end;
-
-       informat=FORMAT_PEM;
-       outformat=FORMAT_PEM;
-
-       ERR_load_crypto_strings();
-       OpenSSL_add_all_algorithms();
-       args = argv + 1;
-       while (!badarg && *args && *args[0] == '-')
-               {
-               if (!strcmp(*args,"-inform"))
-                       {
-                       if (args[1])
-                               {
-                               args++;
-                               informat=str2fmt(*args);
-                               }
-                       else badarg = 1;
-                       }
-               else if (!strcmp(*args,"-outform"))
-                       {
-                       if (args[1])
-                               {
-                               args++;
-                               outformat=str2fmt(*args);
-                               }
-                       else badarg = 1;
-                       }
-               else if (!strcmp(*args,"-passin"))
-                       {
-                       if (!args[1]) goto bad;
-                       passargin= *(++args);
-                       }
-               else if (!strcmp(*args,"-passout"))
-                       {
-                       if (!args[1]) goto bad;
-                       passargout= *(++args);
-                       }
-#ifndef OPENSSL_NO_ENGINE
-               else if (strcmp(*args,"-engine") == 0)
-                       {
-                       if (!args[1]) goto bad;
-                       engine= *(++args);
-                       }
-#endif
-               else if (!strcmp (*args, "-in"))
-                       {
-                       if (args[1])
-                               {
-                               args++;
-                               infile = *args;
-                               }
-                       else badarg = 1;
-                       }
-               else if (!strcmp (*args, "-out"))
-                       {
-                       if (args[1])
-                               {
-                               args++;
-                               outfile = *args;
-                               }
-                       else badarg = 1;
-                       }
-               else if (strcmp(*args,"-pubin") == 0)
-                       {
-                       pubin=1;
-                       pubout=1;
-                       pubtext=1;
-                       }
-               else if (strcmp(*args,"-pubout") == 0)
-                       pubout=1;
-               else if (strcmp(*args,"-text_pub") == 0)
-                       {
-                       pubtext=1;
-                       text=1;
-                       }
-               else if (strcmp(*args,"-text") == 0)
-                       text=1;
-               else if (strcmp(*args,"-noout") == 0)
-                       noout=1;
-               else
-                       {
-                       cipher = EVP_get_cipherbyname(*args + 1);
-                       if (!cipher)
-                               {
-                               BIO_printf(bio_err, "Unknown cipher %s\n",
-                                                               *args + 1);
-                               badarg = 1;
-                               }
-                       }
-               args++;
-               }
-
-       if (badarg)
-               {
-               bad:
-               BIO_printf(bio_err, "Usage pkey [options]\n");
-               BIO_printf(bio_err, "where options are\n");
-               BIO_printf(bio_err, "-in file        input file\n");
-               BIO_printf(bio_err, "-inform X       input format (DER or PEM)\n");
-               BIO_printf(bio_err, "-passin arg     input file pass phrase source\n");
-               BIO_printf(bio_err, "-outform X      output format (DER or PEM)\n");
-               BIO_printf(bio_err, "-out file       output file\n");
-               BIO_printf(bio_err, "-passout arg    output file pass phrase source\n");
-#ifndef OPENSSL_NO_ENGINE
-               BIO_printf(bio_err, "-engine e       use engine e, possibly a hardware device.\n");
-#endif
-               return 1;
-               }
-
+typedef enum OPTION_choice {
+    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
+    OPT_INFORM, OPT_OUTFORM, OPT_PASSIN, OPT_PASSOUT, OPT_ENGINE,
+    OPT_IN, OPT_OUT, OPT_PUBIN, OPT_PUBOUT, OPT_TEXT_PUB,
+    OPT_TEXT, OPT_NOOUT, OPT_MD
+} OPTION_CHOICE;
+
+OPTIONS pkey_options[] = {
+    {"help", OPT_HELP, '-', "Display this summary"},
+    {"inform", OPT_INFORM, 'F', "Input format (DER or PEM)"},
+    {"outform", OPT_OUTFORM, 'F', "Output format (DER or PEM)"},
+    {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
+    {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
+    {"in", OPT_IN, '<', "Input file"},
+    {"out", OPT_OUT, '>', "Output file"},
+    {"pubin", OPT_PUBIN, '-',
+     "Read public key from input (default is private key)"},
+    {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
+    {"text_pub", OPT_TEXT_PUB, '-', "Only output public key components"},
+    {"text", OPT_TEXT, '-', "Output in plaintext as well"},
+    {"noout", OPT_NOOUT, '-', "Don't output the key"},
+    {"", OPT_MD, '-', "Any supported cipher"},
 #ifndef OPENSSL_NO_ENGINE
-        e = setup_engine(bio_err, engine, 0);
-#endif
-
-       if (!app_passwd(bio_err, passargin, passargout, &passin, &passout))
-               {
-               BIO_printf(bio_err, "Error getting passwords\n");
-               goto end;
-               }
-
-       if (outfile)
-               {
-               if (!(out = BIO_new_file (outfile, "wb")))
-                       {
-                       BIO_printf(bio_err,
-                                "Can't open output file %s\n", outfile);
-                       goto end;
-                       }
-               }
-       else
-               {
-               out = BIO_new_fp (stdout, BIO_NOCLOSE);
-#ifdef OPENSSL_SYS_VMS
-                       {
-                       BIO *tmpbio = BIO_new(BIO_f_linebuffer());
-                       out = BIO_push(tmpbio, out);
-                       }
+    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 #endif
-               }
-
-       if (pubin)
-               pkey = load_pubkey(bio_err, infile, informat, 1,
-                       passin, e, "Public Key");
-       else
-               pkey = load_key(bio_err, infile, informat, 1,
-                       passin, e, "key");
-       if (!pkey)
-               goto end;
-
-       if (!noout)
-               {
-               if (outformat == FORMAT_PEM) 
-                       {
-                       if (pubout)
-                               PEM_write_bio_PUBKEY(out,pkey);
-                       else
-                               PEM_write_bio_PrivateKey(out, pkey, cipher,
-                                                       NULL, 0, NULL, passout);
-                       }
-               else if (outformat == FORMAT_ASN1)
-                       {
-                       if (pubout)
-                               i2d_PUBKEY_bio(out, pkey);
-                       else
-                               i2d_PrivateKey_bio(out, pkey);
-                       }
-               else
-                       {
-                       BIO_printf(bio_err, "Bad format specified for key\n");
-                       goto end;
-                       }
-
-               }
-
-       if (text)
-               {
-               if (pubtext)
-                       EVP_PKEY_print_public(out, pkey, 0, NULL);
-               else
-                       EVP_PKEY_print_private(out, pkey, 0, NULL);
-               }
-
-       ret = 0;
-
-       end:
-       EVP_PKEY_free(pkey);
-       BIO_free_all(out);
-       BIO_free(in);
-       if (passin)
-               OPENSSL_free(passin);
-       if (passout)
-               OPENSSL_free(passout);
-
-       return ret;
-       }
+    {NULL}
+};
+
+int pkey_main(int argc, char **argv)
+{
+    BIO *in = NULL, *out = NULL;
+    ENGINE *e = NULL;
+    EVP_PKEY *pkey = NULL;
+    const EVP_CIPHER *cipher = NULL;
+    char *infile = NULL, *outfile = NULL, *passin = NULL, *passout = NULL;
+    char *passinarg = NULL, *passoutarg = NULL, *prog;
+    OPTION_CHOICE o;
+    int informat = FORMAT_PEM, outformat = FORMAT_PEM;
+    int pubin = 0, pubout = 0, pubtext = 0, text = 0, noout = 0, ret = 1;
+
+    prog = opt_init(argc, argv, pkey_options);
+    while ((o = opt_next()) != OPT_EOF) {
+        switch (o) {
+        case OPT_EOF:
+        case OPT_ERR:
+ opthelp:
+            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
+            goto end;
+        case OPT_HELP:
+            opt_help(pkey_options);
+            ret = 0;
+            goto end;
+        case OPT_INFORM:
+            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
+                goto opthelp;
+            break;
+        case OPT_OUTFORM:
+            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
+                goto opthelp;
+            break;
+        case OPT_PASSIN:
+            passinarg = opt_arg();
+            break;
+        case OPT_PASSOUT:
+            passoutarg = opt_arg();
+            break;
+        case OPT_ENGINE:
+            e = setup_engine(opt_arg(), 0);
+            break;
+        case OPT_IN:
+            infile = opt_arg();
+            break;
+        case OPT_OUT:
+            outfile = opt_arg();
+            break;
+        case OPT_PUBIN:
+            pubin = pubout = pubtext = 1;
+            break;
+        case OPT_PUBOUT:
+            pubout = 1;
+            break;
+        case OPT_TEXT_PUB:
+            pubtext = text = 1;
+            break;
+        case OPT_TEXT:
+            text = 1;
+            break;
+        case OPT_NOOUT:
+            noout = 1;
+            break;
+        case OPT_MD:
+            if (!opt_cipher(opt_unknown(), &cipher))
+                goto opthelp;
+        }
+    }
+    argc = opt_num_rest();
+    argv = opt_rest();
+
+    if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
+        BIO_printf(bio_err, "Error getting passwords\n");
+        goto end;
+    }
+
+    if (!app_load_modules(NULL))
+        goto end;
+
+    out = bio_open_default(outfile, "wb");
+    if (out == NULL)
+        goto end;
+
+    if (pubin)
+        pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
+    else
+        pkey = load_key(infile, informat, 1, passin, e, "key");
+    if (!pkey)
+        goto end;
+
+    if (!noout) {
+        if (outformat == FORMAT_PEM) {
+            if (pubout)
+                PEM_write_bio_PUBKEY(out, pkey);
+            else
+                PEM_write_bio_PrivateKey(out, pkey, cipher,
+                                         NULL, 0, NULL, passout);
+        } else if (outformat == FORMAT_ASN1) {
+            if (pubout)
+                i2d_PUBKEY_bio(out, pkey);
+            else
+                i2d_PrivateKey_bio(out, pkey);
+        } else {
+            BIO_printf(bio_err, "Bad format specified for key\n");
+            goto end;
+        }
+
+    }
+
+    if (text) {
+        if (pubtext)
+            EVP_PKEY_print_public(out, pkey, 0, NULL);
+        else
+            EVP_PKEY_print_private(out, pkey, 0, NULL);
+    }
+
+    ret = 0;
+
+ end:
+    EVP_PKEY_free(pkey);
+    BIO_free_all(out);
+    BIO_free(in);
+    OPENSSL_free(passin);
+    OPENSSL_free(passout);
+
+    return ret;
+}