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/*
* Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (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 <openssl/opensslconf.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include "progs.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
static OPT_PAIR conv_forms[] = {
{"compressed", POINT_CONVERSION_COMPRESSED},
{"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
{"hybrid", POINT_CONVERSION_HYBRID},
{NULL}
};
static OPT_PAIR param_enc[] = {
{"named_curve", OPENSSL_EC_NAMED_CURVE},
{"explicit", 0},
{NULL}
};
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
OPT_NOOUT, OPT_TEXT, OPT_PARAM_OUT, OPT_PUBIN, OPT_PUBOUT,
OPT_PASSIN, OPT_PASSOUT, OPT_PARAM_ENC, OPT_CONV_FORM, OPT_CIPHER,
OPT_NO_PUBLIC, OPT_CHECK
} OPTION_CHOICE;
const OPTIONS ec_options[] = {
{"help", OPT_HELP, '-', "Display this summary"},
{"in", OPT_IN, 's', "Input file"},
{"inform", OPT_INFORM, 'f', "Input format - DER or PEM"},
{"out", OPT_OUT, '>', "Output file"},
{"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
{"noout", OPT_NOOUT, '-', "Don't print key out"},
{"text", OPT_TEXT, '-', "Print the key"},
{"param_out", OPT_PARAM_OUT, '-', "Print the elliptic curve parameters"},
{"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
{"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
{"no_public", OPT_NO_PUBLIC, '-', "exclude public key from private key"},
{"check", OPT_CHECK, '-', "check key consistency"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
{"param_enc", OPT_PARAM_ENC, 's',
"Specifies the way the ec parameters are encoded"},
{"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
{"", OPT_CIPHER, '-', "Any supported cipher"},
#ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
#endif
{NULL}
};
int ec_main(int argc, char **argv)
{
BIO *in = NULL, *out = NULL;
ENGINE *e = NULL;
EC_KEY *eckey = NULL;
const EC_GROUP *group;
const EVP_CIPHER *enc = NULL;
point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
char *infile = NULL, *outfile = NULL, *prog;
char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
OPTION_CHOICE o;
int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_form = 0, new_asn1_flag = 0;
int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
int pubin = 0, pubout = 0, param_out = 0, i, ret = 1, private = 0;
int no_public = 0, check = 0;
prog = opt_init(argc, argv, ec_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(ec_options);
ret = 0;
goto end;
case OPT_INFORM:
if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
goto opthelp;
break;
case OPT_IN:
infile = opt_arg();
break;
case OPT_OUTFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
goto opthelp;
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_NOOUT:
noout = 1;
break;
case OPT_TEXT:
text = 1;
break;
case OPT_PARAM_OUT:
param_out = 1;
break;
case OPT_PUBIN:
pubin = 1;
break;
case OPT_PUBOUT:
pubout = 1;
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_CIPHER:
if (!opt_cipher(opt_unknown(), &enc))
goto opthelp;
break;
case OPT_CONV_FORM:
if (!opt_pair(opt_arg(), conv_forms, &i))
goto opthelp;
new_form = 1;
form = i;
break;
case OPT_PARAM_ENC:
if (!opt_pair(opt_arg(), param_enc, &i))
goto opthelp;
new_asn1_flag = 1;
asn1_flag = i;
break;
case OPT_NO_PUBLIC:
no_public = 1;
break;
case OPT_CHECK:
check = 1;
break;
}
}
argc = opt_num_rest();
if (argc != 0)
goto opthelp;
private = param_out || pubin || pubout ? 0 : 1;
if (text && !pubin)
private = 1;
if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
if (informat != FORMAT_ENGINE) {
in = bio_open_default(infile, 'r', informat);
if (in == NULL)
goto end;
}
BIO_printf(bio_err, "read EC key\n");
if (informat == FORMAT_ASN1) {
if (pubin)
eckey = d2i_EC_PUBKEY_bio(in, NULL);
else
eckey = d2i_ECPrivateKey_bio(in, NULL);
} else if (informat == FORMAT_ENGINE) {
EVP_PKEY *pkey;
if (pubin)
pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
else
pkey = load_key(infile, informat, 1, passin, e, "Private Key");
if (pkey != NULL) {
eckey = EVP_PKEY_get1_EC_KEY(pkey);
EVP_PKEY_free(pkey);
}
} else {
if (pubin)
eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, NULL);
else
eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL, passin);
}
if (eckey == NULL) {
BIO_printf(bio_err, "unable to load Key\n");
ERR_print_errors(bio_err);
goto end;
}
out = bio_open_owner(outfile, outformat, private);
if (out == NULL)
goto end;
group = EC_KEY_get0_group(eckey);
if (new_form)
EC_KEY_set_conv_form(eckey, form);
if (new_asn1_flag)
EC_KEY_set_asn1_flag(eckey, asn1_flag);
if (no_public)
EC_KEY_set_enc_flags(eckey, EC_PKEY_NO_PUBKEY);
if (text) {
assert(pubin || private);
if (!EC_KEY_print(out, eckey, 0)) {
perror(outfile);
ERR_print_errors(bio_err);
goto end;
}
}
if (check) {
if (EC_KEY_check_key(eckey) == 1) {
BIO_printf(bio_err, "EC Key valid.\n");
} else {
BIO_printf(bio_err, "EC Key Invalid!\n");
ERR_print_errors(bio_err);
}
}
if (noout) {
ret = 0;
goto end;
}
BIO_printf(bio_err, "writing EC key\n");
if (outformat == FORMAT_ASN1) {
if (param_out) {
i = i2d_ECPKParameters_bio(out, group);
} else if (pubin || pubout) {
i = i2d_EC_PUBKEY_bio(out, eckey);
} else {
assert(private);
i = i2d_ECPrivateKey_bio(out, eckey);
}
} else {
if (param_out) {
i = PEM_write_bio_ECPKParameters(out, group);
} else if (pubin || pubout) {
i = PEM_write_bio_EC_PUBKEY(out, eckey);
} else {
assert(private);
i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
NULL, 0, NULL, passout);
}
}
if (!i) {
BIO_printf(bio_err, "unable to write private key\n");
ERR_print_errors(bio_err);
} else {
ret = 0;
}
end:
BIO_free(in);
BIO_free_all(out);
EC_KEY_free(eckey);
release_engine(e);
OPENSSL_free(passin);
OPENSSL_free(passout);
return ret;
}
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