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openssl/apps/genpkey.c
Rich Salz 182717bd8a Fetch alg, etc., after loading providers 
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14135)
2021-02-12 08:34:17 +10:00

348 lines
9.4 KiB
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/*
* Copyright 2006-2021 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, *p;
const char *ciphername = NULL, *paramfile = NULL, *algname = NULL;
const EVP_CIPHER *cipher = NULL;
OPTION_CHOICE o;
int outformat = FORMAT_PEM, text = 0, ret = 1, rv, do_param = 0;
int private = 0, i, m;
OSSL_LIB_CTX *libctx = app_get0_libctx();
STACK_OF(OPENSSL_STRING) *keyopt = NULL;
prog = opt_init(argc, argv, genpkey_options);
keyopt = sk_OPENSSL_STRING_new_null();
if (keyopt == NULL)
goto end;
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;
paramfile = opt_arg();
break;
case OPT_ALGORITHM:
algname = opt_arg();
break;
case OPT_PKEYOPT:
if (!sk_OPENSSL_STRING_push(keyopt, opt_arg()))
goto end;
break;
case OPT_GENPARAM:
do_param = 1;
break;
case OPT_TEXT:
text = 1;
break;
case OPT_CIPHER:
ciphername = opt_unknown();
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;
/* Fetch cipher, etc. */
if (paramfile != NULL) {
if (!init_keygen_file(&ctx, paramfile, e, libctx, app_get0_propq()))
goto end;
}
if (algname != NULL) {
if (!init_gen_str(&ctx, algname, e, do_param, libctx, app_get0_propq()))
goto end;
}
if (ctx == NULL)
goto opthelp;
for (i = 0; i < sk_OPENSSL_STRING_num(keyopt); i++) {
p = sk_OPENSSL_STRING_value(keyopt, i);
if (pkey_ctrl_string(ctx, p) <= 0) {
BIO_printf(bio_err, "%s: Error setting %s parameter:\n", prog, p);
ERR_print_errors(bio_err);
goto end;
}
}
if (ciphername != NULL) {
if (!opt_cipher(ciphername, &cipher) || do_param == 1)
goto opthelp;
m = EVP_CIPHER_mode(cipher);
if (m == EVP_CIPH_GCM_MODE || m == EVP_CIPH_CCM_MODE
|| m == EVP_CIPH_XTS_MODE || m == EVP_CIPH_OCB_MODE) {
BIO_printf(bio_err, "%s: cipher mode not supported\n", prog);
goto end;
}
}
private = do_param ? 0 : 1;
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:
sk_OPENSSL_STRING_free(keyopt);
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_ex(pbio, NULL, libctx, propq);
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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