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openssl/apps/genpkey.c
Rich Salz 021410ea3f Check non-option arguments 
Make sure all commands check to see if there are any "extra" arguments
after the options, and print an error if so.

Made all error messages consistent (which is to say, minimal).

Fixes: #13527

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13563)
2020-12-15 11:47:17 +01:00

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/*
* Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <string.h>
#include "apps.h"
#include "progs.h"
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/evp.h>
static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e,
OSSL_LIB_CTX *libctx, const char *propq);
static int genpkey_cb(EVP_PKEY_CTX *ctx);
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_ENGINE, OPT_OUTFORM, OPT_OUT, OPT_PASS, OPT_PARAMFILE,
OPT_ALGORITHM, OPT_PKEYOPT, OPT_GENPARAM, OPT_TEXT, OPT_CIPHER,
OPT_CONFIG,
OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS genpkey_options[] = {
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
#ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
#endif
{"paramfile", OPT_PARAMFILE, '<', "Parameters file"},
{"algorithm", OPT_ALGORITHM, 's', "The public key algorithm"},
{"pkeyopt", OPT_PKEYOPT, 's',
"Set the public key algorithm option as opt:value"},
OPT_CONFIG_OPTION,
OPT_SECTION("Output"),
{"out", OPT_OUT, '>', "Output file"},
{"outform", OPT_OUTFORM, 'F', "output format (DER or PEM)"},
{"pass", OPT_PASS, 's', "Output file pass phrase source"},
{"genparam", OPT_GENPARAM, '-', "Generate parameters, not key"},
{"text", OPT_TEXT, '-', "Print the in text"},
{"", OPT_CIPHER, '-', "Cipher to use to encrypt the key"},
OPT_PROV_OPTIONS,
/* This is deliberately last. */
{OPT_HELP_STR, 1, 1,
"Order of options may be important! See the documentation.\n"},
{NULL}
};
int genpkey_main(int argc, char **argv)
{
CONF *conf = NULL;
BIO *in = NULL, *out = NULL;
ENGINE *e = NULL;
EVP_PKEY *pkey = NULL;
EVP_PKEY_CTX *ctx = NULL;
char *outfile = NULL, *passarg = NULL, *pass = NULL, *prog;
const EVP_CIPHER *cipher = NULL;
OPTION_CHOICE o;
int outformat = FORMAT_PEM, text = 0, ret = 1, rv, do_param = 0;
int private = 0;
OSSL_LIB_CTX *libctx = app_get0_libctx();
const char *propq = app_get0_propq();
prog = opt_init(argc, argv, genpkey_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:
ret = 0;
opt_help(genpkey_options);
goto end;
case OPT_OUTFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
goto opthelp;
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_PASS:
passarg = opt_arg();
break;
case OPT_ENGINE:
e = setup_engine(opt_arg(), 0);
break;
case OPT_PARAMFILE:
if (do_param == 1)
goto opthelp;
if (!init_keygen_file(&ctx, opt_arg(), e, libctx, propq))
goto end;
break;
case OPT_ALGORITHM:
if (!init_gen_str(&ctx, opt_arg(), e, do_param, libctx, propq))
goto end;
break;
case OPT_PKEYOPT:
if (ctx == NULL) {
BIO_printf(bio_err, "%s: No keytype specified.\n", prog);
goto opthelp;
}
if (pkey_ctrl_string(ctx, opt_arg()) <= 0) {
BIO_printf(bio_err,
"%s: Error setting %s parameter:\n",
prog, opt_arg());
ERR_print_errors(bio_err);
goto end;
}
break;
case OPT_GENPARAM:
if (ctx != NULL) {
BIO_printf(bio_err,
"%s: '-genparam' option must be set before"
" the '-algorithm' option.\n", prog);
goto opthelp;
}
do_param = 1;
break;
case OPT_TEXT:
text = 1;
break;
case OPT_CIPHER:
if (!opt_cipher(opt_unknown(), &cipher)
|| do_param == 1)
goto opthelp;
if (EVP_CIPHER_mode(cipher) == EVP_CIPH_GCM_MODE ||
EVP_CIPHER_mode(cipher) == EVP_CIPH_CCM_MODE ||
EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE ||
EVP_CIPHER_mode(cipher) == EVP_CIPH_OCB_MODE) {
BIO_printf(bio_err, "%s: cipher mode not supported\n", prog);
goto end;
}
break;
case OPT_CONFIG:
conf = app_load_config_modules(opt_arg());
if (conf == NULL)
goto end;
break;
case OPT_PROV_CASES:
if (!opt_provider(o))
goto end;
break;
}
}
/* No extra arguments. */
argc = opt_num_rest();
if (argc != 0)
goto opthelp;
private = do_param ? 0 : 1;
if (ctx == NULL)
goto opthelp;
if (!app_passwd(passarg, NULL, &pass, NULL)) {
BIO_puts(bio_err, "Error getting password\n");
goto end;
}
out = bio_open_owner(outfile, outformat, private);
if (out == NULL)
goto end;
EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
EVP_PKEY_CTX_set_app_data(ctx, bio_err);
if (do_param) {
if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) {
BIO_puts(bio_err, "Error generating parameters\n");
ERR_print_errors(bio_err);
goto end;
}
} else {
if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
BIO_puts(bio_err, "Error generating key\n");
ERR_print_errors(bio_err);
goto end;
}
}
if (do_param) {
rv = PEM_write_bio_Parameters(out, pkey);
} else if (outformat == FORMAT_PEM) {
assert(private);
rv = PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0, NULL, pass);
} else if (outformat == FORMAT_ASN1) {
assert(private);
rv = i2d_PrivateKey_bio(out, pkey);
} else {
BIO_printf(bio_err, "Bad format specified for key\n");
goto end;
}
ret = 0;
if (rv <= 0) {
BIO_puts(bio_err, "Error writing key\n");
ERR_print_errors(bio_err);
ret = 1;
}
if (text) {
if (do_param)
rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
else
rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
if (rv <= 0) {
BIO_puts(bio_err, "Error printing key\n");
ERR_print_errors(bio_err);
ret = 1;
}
}
end:
EVP_PKEY_free(pkey);
EVP_PKEY_CTX_free(ctx);
BIO_free_all(out);
BIO_free(in);
release_engine(e);
OPENSSL_free(pass);
NCONF_free(conf);
return ret;
}
static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e,
OSSL_LIB_CTX *libctx, const char *propq)
{
BIO *pbio;
EVP_PKEY *pkey = NULL;
EVP_PKEY_CTX *ctx = NULL;
if (*pctx) {
BIO_puts(bio_err, "Parameters already set!\n");
return 0;
}
pbio = BIO_new_file(file, "r");
if (pbio == NULL) {
BIO_printf(bio_err, "Can't open parameter file %s\n", file);
return 0;
}
pkey = PEM_read_bio_Parameters(pbio, NULL);
BIO_free(pbio);
if (pkey == NULL) {
BIO_printf(bio_err, "Error reading parameter file %s\n", file);
return 0;
}
if (e != NULL)
ctx = EVP_PKEY_CTX_new(pkey, e);
else
ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);
if (ctx == NULL)
goto err;
if (EVP_PKEY_keygen_init(ctx) <= 0)
goto err;
EVP_PKEY_free(pkey);
*pctx = ctx;
return 1;
err:
BIO_puts(bio_err, "Error initializing context\n");
ERR_print_errors(bio_err);
EVP_PKEY_CTX_free(ctx);
EVP_PKEY_free(pkey);
return 0;
}
int init_gen_str(EVP_PKEY_CTX **pctx,
const char *algname, ENGINE *e, int do_param,
OSSL_LIB_CTX *libctx, const char *propq)
{
EVP_PKEY_CTX *ctx = NULL;
int pkey_id;
if (*pctx) {
BIO_puts(bio_err, "Algorithm already set!\n");
return 0;
}
pkey_id = get_legacy_pkey_id(libctx, algname, e);
if (pkey_id != NID_undef)
ctx = EVP_PKEY_CTX_new_id(pkey_id, e);
else
ctx = EVP_PKEY_CTX_new_from_name(libctx, algname, propq);
if (ctx == NULL)
goto err;
if (do_param) {
if (EVP_PKEY_paramgen_init(ctx) <= 0)
goto err;
} else {
if (EVP_PKEY_keygen_init(ctx) <= 0)
goto err;
}
*pctx = ctx;
return 1;
err:
BIO_printf(bio_err, "Error initializing %s context\n", algname);
ERR_print_errors(bio_err);
EVP_PKEY_CTX_free(ctx);
return 0;
}
static int genpkey_cb(EVP_PKEY_CTX *ctx)
{
char c = '*';
BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
int p;
p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
if (p == 0)
c = '.';
if (p == 1)
c = '+';
if (p == 2)
c = '*';
if (p == 3)
c = '\n';
BIO_write(b, &c, 1);
(void)BIO_flush(b);
return 1;
}
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