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openssl/apps/ec.c

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/*
* Copyright 2002-2023 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 <string.h>
#include <openssl/opensslconf.h>
#include <openssl/evp.h>
#include <openssl/encoder.h>
#include <openssl/decoder.h>
#include <openssl/core_names.h>
#include <openssl/core_dispatch.h>
#include <openssl/params.h>
#include <openssl/err.h>
#include "apps.h"
#include "progs.h"
#include "ec_common.h"
typedef enum OPTION_choice {
OPT_COMMON,
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, OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS ec_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
OPT_SECTION("Input"),
{"in", OPT_IN, 's', "Input file"},
{"inform", OPT_INFORM, 'f', "Input format (DER/PEM/P12/ENGINE)"},
{"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
{"check", OPT_CHECK, '-', "check key consistency"},
{"", OPT_CIPHER, '-', "Any supported cipher"},
{"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_SECTION("Output"),
{"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"},
{"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
{"no_public", OPT_NO_PUBLIC, '-', "exclude public key from private key"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
OPT_PROV_OPTIONS,
{NULL}
};
int ec_main(int argc, char **argv)
{
OSSL_ENCODER_CTX *ectx = NULL;
OSSL_DECODER_CTX *dctx = NULL;
EVP_PKEY_CTX *pctx = NULL;
EVP_PKEY *eckey = NULL;
BIO *out = NULL;
ENGINE *e = NULL;
EVP_CIPHER *enc = NULL;
char *infile = NULL, *outfile = NULL, *ciphername = NULL, *prog;
char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
OPTION_CHOICE o;
int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, text = 0, noout = 0;
int pubin = 0, pubout = 0, param_out = 0, ret = 1, private = 0;
int check = 0;
char *asn1_encoding = NULL;
char *point_format = NULL;
int no_public = 0;
opt_set_unknown_name("cipher");
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:
ciphername = opt_unknown();
break;
case OPT_CONV_FORM:
point_format = opt_arg();
if (!opt_string(point_format, point_format_options))
goto opthelp;
break;
case OPT_PARAM_ENC:
asn1_encoding = opt_arg();
if (!opt_string(asn1_encoding, asn1_encoding_options))
goto opthelp;
break;
case OPT_NO_PUBLIC:
no_public = 1;
break;
case OPT_CHECK:
check = 1;
break;
case OPT_PROV_CASES:
if (!opt_provider(o))
goto end;
break;
}
}
/* No extra arguments. */
if (!opt_check_rest_arg(NULL))
goto opthelp;
if (!opt_cipher(ciphername, &enc))
goto opthelp;
private = !pubin && (text || (!param_out && !pubout));
if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
BIO_printf(bio_err, "read EC key\n");
if (pubin)
eckey = load_pubkey(infile, informat, 1, passin, e, "public key");
else
eckey = load_key(infile, informat, 1, passin, e, "private key");
if (eckey == NULL) {
BIO_printf(bio_err, "unable to load Key\n");
goto end;
}
out = bio_open_owner(outfile, outformat, private);
if (out == NULL)
goto end;
if (point_format
&& !EVP_PKEY_set_utf8_string_param(
eckey, OSSL_PKEY_PARAM_EC_POINT_CONVERSION_FORMAT,
point_format)) {
BIO_printf(bio_err, "unable to set point conversion format\n");
goto end;
}
if (asn1_encoding != NULL
&& !EVP_PKEY_set_utf8_string_param(
eckey, OSSL_PKEY_PARAM_EC_ENCODING, asn1_encoding)) {
BIO_printf(bio_err, "unable to set asn1 encoding format\n");
goto end;
}
if (no_public) {
if (!EVP_PKEY_set_int_param(eckey, OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC, 0)) {
BIO_printf(bio_err, "unable to disable public key encoding\n");
goto end;
}
} else {
if (!EVP_PKEY_set_int_param(eckey, OSSL_PKEY_PARAM_EC_INCLUDE_PUBLIC, 1)) {
BIO_printf(bio_err, "unable to enable public key encoding\n");
goto end;
}
}
if (text) {
assert(pubin || private);
if ((pubin && EVP_PKEY_print_public(out, eckey, 0, NULL) <= 0)
|| (!pubin && EVP_PKEY_print_private(out, eckey, 0, NULL) <= 0)) {
BIO_printf(bio_err, "unable to print EC key\n");
goto end;
}
}
if (check) {
pctx = EVP_PKEY_CTX_new_from_pkey(NULL, eckey, NULL);
if (pctx == NULL) {
BIO_printf(bio_err, "unable to check EC key\n");
goto end;
}
if (EVP_PKEY_check(pctx) <= 0)
BIO_printf(bio_err, "EC Key Invalid!\n");
else
BIO_printf(bio_err, "EC Key valid.\n");
ERR_print_errors(bio_err);
}
if (!noout) {
int selection;
const char *output_type = outformat == FORMAT_ASN1 ? "DER" : "PEM";
const char *output_structure = "type-specific";
BIO_printf(bio_err, "writing EC key\n");
if (param_out) {
selection = OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS;
} else if (pubin || pubout) {
selection = OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS
| OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
output_structure = "SubjectPublicKeyInfo";
} else {
selection = OSSL_KEYMGMT_SELECT_ALL;
assert(private);
}
ectx = OSSL_ENCODER_CTX_new_for_pkey(eckey, selection,
output_type, output_structure,
NULL);
if (enc != NULL) {
OSSL_ENCODER_CTX_set_cipher(ectx, EVP_CIPHER_get0_name(enc), NULL);
/* Default passphrase prompter */
OSSL_ENCODER_CTX_set_passphrase_ui(ectx, get_ui_method(), NULL);
if (passout != NULL)
/* When passout given, override the passphrase prompter */
OSSL_ENCODER_CTX_set_passphrase(ectx,
(const unsigned char *)passout,
strlen(passout));
}
if (!OSSL_ENCODER_to_bio(ectx, out)) {
BIO_printf(bio_err, "unable to write EC key\n");
goto end;
}
}
ret = 0;
end:
if (ret != 0)
ERR_print_errors(bio_err);
BIO_free_all(out);
EVP_PKEY_free(eckey);
EVP_CIPHER_free(enc);
OSSL_ENCODER_CTX_free(ectx);
OSSL_DECODER_CTX_free(dctx);
EVP_PKEY_CTX_free(pctx);
release_engine(e);
if (passin != NULL)
OPENSSL_clear_free(passin, strlen(passin));
if (passout != NULL)
OPENSSL_clear_free(passout, strlen(passout));
return ret;
}
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