355 lines
9.2 KiB
C
355 lines
9.2 KiB
C
// Copyright 2020 Paul Spooren <mail@aparcar.org>
|
|
//
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#define _GNU_SOURCE
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <wolfssl/options.h>
|
|
#include <wolfssl/wolfcrypt/asn.h>
|
|
#include <wolfssl/wolfcrypt/asn_public.h>
|
|
#include <wolfssl/wolfcrypt/ecc.h>
|
|
#include <wolfssl/wolfcrypt/error-crypt.h>
|
|
#include <wolfssl/wolfcrypt/rsa.h>
|
|
#include <wolfssl/wolfcrypt/settings.h>
|
|
|
|
#define HEAP_HINT NULL
|
|
#define FOURK_SZ 4096
|
|
#define WOLFSSL_MIN_RSA_BITS 2048
|
|
|
|
enum {
|
|
EC_KEY_TYPE = 0,
|
|
RSA_KEY_TYPE = 1,
|
|
};
|
|
|
|
int write_file(byte *buf, int bufSz, char *path) {
|
|
int ret;
|
|
FILE *file;
|
|
if (path) {
|
|
file = fopen(path, "wb");
|
|
if (file == NULL) {
|
|
perror("Error opening file");
|
|
exit(1);
|
|
}
|
|
} else {
|
|
file = stdout;
|
|
}
|
|
ret = (int)fwrite(buf, 1, bufSz, file);
|
|
if (path) {
|
|
fclose(file);
|
|
}
|
|
if (ret > 0) {
|
|
/* ret > 0 indicates a successful file write, set to zero for return */
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int write_key(ecc_key *ecKey, RsaKey *rsaKey, int type, int keySz, char *fName,
|
|
bool write_pem) {
|
|
int ret;
|
|
byte der[FOURK_SZ] = {};
|
|
byte pem[FOURK_SZ] = {};
|
|
int derSz, pemSz;
|
|
if (type == EC_KEY_TYPE) {
|
|
ret = wc_EccKeyToDer(ecKey, der, sizeof(der));
|
|
} else {
|
|
ret = wc_RsaKeyToDer(rsaKey, der, sizeof(der));
|
|
}
|
|
if (ret <= 0) {
|
|
fprintf(stderr, "Key To DER failed: %d\n", ret);
|
|
}
|
|
derSz = ret;
|
|
|
|
if (write_pem) {
|
|
if (type == EC_KEY_TYPE) {
|
|
ret = wc_DerToPem(der, derSz, pem, sizeof(pem), ECC_PRIVATEKEY_TYPE);
|
|
} else {
|
|
ret = wc_DerToPem(der, derSz, pem, sizeof(pem), PRIVATEKEY_TYPE);
|
|
}
|
|
if (ret <= 0) {
|
|
fprintf(stderr, "DER to PEM failed: %d\n", ret);
|
|
}
|
|
pemSz = ret;
|
|
ret = write_file(pem, pemSz, fName);
|
|
} else {
|
|
ret = write_file(der, derSz, fName);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int gen_key(WC_RNG *rng, ecc_key *ecKey, RsaKey *rsaKey, int type, int keySz,
|
|
long exp, int curve) {
|
|
int ret;
|
|
|
|
if (type == EC_KEY_TYPE) {
|
|
ret = wc_ecc_init(ecKey);
|
|
(void)rsaKey;
|
|
} else {
|
|
ret = wc_InitRsaKey(rsaKey, NULL);
|
|
(void)ecKey;
|
|
}
|
|
if (ret != 0) {
|
|
fprintf(stderr, "Key initialization failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (type == EC_KEY_TYPE) {
|
|
fprintf(stderr, "Generating EC private key\n");
|
|
ret = wc_ecc_make_key_ex(rng, 32, ecKey, curve);
|
|
} else {
|
|
fprintf(stderr, "Generating RSA private key, %i bit long modulus\n", keySz);
|
|
ret = wc_MakeRsaKey(rsaKey, keySz, WC_RSA_EXPONENT, rng);
|
|
}
|
|
if (ret != 0) {
|
|
fprintf(stderr, "Key generation failed: %d\n", ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int selfsigned(WC_RNG *rng, char **arg) {
|
|
ecc_key ecKey;
|
|
RsaKey rsaKey;
|
|
int ret;
|
|
char *subject = "";
|
|
int keySz = WOLFSSL_MIN_RSA_BITS;
|
|
int type = EC_KEY_TYPE;
|
|
int exp = WC_RSA_EXPONENT;
|
|
int curve = ECC_SECP256R1;
|
|
unsigned int days = 3653; // 10 years
|
|
char *keypath = NULL, *certpath = NULL;
|
|
char fstr[20], tstr[20];
|
|
bool pem = true;
|
|
Cert newCert;
|
|
#ifdef __USE_TIME_BITS64
|
|
time_t to, from = time(NULL);
|
|
#else
|
|
unsigned long to, from = time(NULL);
|
|
#endif
|
|
byte derBuf[FOURK_SZ] = {};
|
|
byte pemBuf[FOURK_SZ] = {};
|
|
int pemSz = -1;
|
|
int derSz = -1;
|
|
char *key, *val, *tmp;
|
|
|
|
ret = wc_InitCert(&newCert);
|
|
if (ret != 0) {
|
|
fprintf(stderr, "Init Cert failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
newCert.isCA = 0;
|
|
|
|
while (*arg && **arg == '-') {
|
|
if (!strncmp(*arg, "-der", 4)) {
|
|
pem = false;
|
|
} else if (!strncmp(*arg, "-newkey", 6) && arg[1]) {
|
|
if (!strncmp(arg[1], "rsa:", 4)) {
|
|
type = RSA_KEY_TYPE;
|
|
keySz = (unsigned int)atoi(arg[1] + 4);
|
|
} else if (!strncmp(arg[1], "ec", 2)) {
|
|
type = EC_KEY_TYPE;
|
|
} else {
|
|
fprintf(stderr, "error: invalid algorithm\n");
|
|
return 1;
|
|
}
|
|
arg++;
|
|
} else if (!strncmp(*arg, "-days", 5) && arg[1]) {
|
|
days = (unsigned int)atoi(arg[1]);
|
|
arg++;
|
|
} else if (!strncmp(*arg, "-pkeyopt", 8) && arg[1]) {
|
|
if (strncmp(arg[1], "ec_paramgen_curve:", 18)) {
|
|
fprintf(stderr, "error: invalid pkey option: %s\n", arg[1]);
|
|
return 1;
|
|
}
|
|
if (!strncmp(arg[1] + 18, "P-256:", 5)) {
|
|
curve = ECC_SECP256R1;
|
|
} else if (!strncmp(arg[1] + 18, "P-384:", 5)) {
|
|
curve = ECC_SECP384R1;
|
|
} else if (!strncmp(arg[1] + 18, "P-521:", 5)) {
|
|
curve = ECC_SECP521R1;
|
|
} else {
|
|
fprintf(stderr, "error: invalid curve name: %s\n", arg[1] + 18);
|
|
return 1;
|
|
}
|
|
arg++;
|
|
} else if (!strncmp(*arg, "-keyout", 7) && arg[1]) {
|
|
keypath = arg[1];
|
|
arg++;
|
|
} else if (!strncmp(*arg, "-out", 4) && arg[1]) {
|
|
certpath = arg[1];
|
|
arg++;
|
|
} else if (!strcmp(*arg, "-subj") && arg[1]) {
|
|
subject = strdupa(arg[1]);
|
|
key = arg[1];
|
|
do {
|
|
tmp = strchr(key, '/');
|
|
if (tmp)
|
|
*tmp = '\0';
|
|
|
|
val = strchr(key, '=');
|
|
if (val) {
|
|
*val = '\0';
|
|
++val;
|
|
|
|
if (!strcmp(key, "C"))
|
|
strncpy(newCert.subject.country, val, CTC_NAME_SIZE);
|
|
else if (!strcmp(key, "ST"))
|
|
strncpy(newCert.subject.state, val, CTC_NAME_SIZE);
|
|
else if (!strcmp(key, "L"))
|
|
strncpy(newCert.subject.locality, val, CTC_NAME_SIZE);
|
|
else if (!strcmp(key, "O"))
|
|
strncpy(newCert.subject.org, val, CTC_NAME_SIZE);
|
|
else if (!strcmp(key, "OU"))
|
|
strncpy(newCert.subject.unit, val, CTC_NAME_SIZE);
|
|
else if (!strcmp(key, "CN"))
|
|
strncpy(newCert.subject.commonName, val, CTC_NAME_SIZE);
|
|
else if (!strcmp(key, "EMAIL"))
|
|
strncpy(newCert.subject.email, val, CTC_NAME_SIZE);
|
|
else
|
|
printf("warning: unknown attribute %s=%s\n", key, val);
|
|
}
|
|
} while (tmp && (key = ++tmp));
|
|
}
|
|
arg++;
|
|
}
|
|
newCert.daysValid = days;
|
|
|
|
gen_key(rng, &ecKey, &rsaKey, type, keySz, exp, curve);
|
|
write_key(&ecKey, &rsaKey, type, keySz, keypath, pem);
|
|
|
|
from = (from < 1000000000) ? 1000000000 : from;
|
|
strftime(fstr, sizeof(fstr), "%Y%m%d%H%M%S", gmtime(&from));
|
|
to = from + 60 * 60 * 24 * days;
|
|
if (to < from)
|
|
to = INT_MAX;
|
|
strftime(tstr, sizeof(tstr), "%Y%m%d%H%M%S", gmtime(&to));
|
|
|
|
fprintf(stderr,
|
|
"Generating selfsigned certificate with subject '%s'"
|
|
" and validity %s-%s\n",
|
|
subject, fstr, tstr);
|
|
|
|
if (type == EC_KEY_TYPE) {
|
|
newCert.sigType = CTC_SHA256wECDSA;
|
|
ret = wc_MakeCert(&newCert, derBuf, sizeof(derBuf), NULL, &ecKey, rng);
|
|
} else {
|
|
newCert.sigType = CTC_SHA256wRSA;
|
|
ret = wc_MakeCert(&newCert, derBuf, sizeof(derBuf), &rsaKey, NULL, rng);
|
|
}
|
|
if (ret <= 0) {
|
|
fprintf(stderr, "Make Cert failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (type == EC_KEY_TYPE) {
|
|
ret = wc_SignCert(newCert.bodySz, newCert.sigType, derBuf, sizeof(derBuf),
|
|
NULL, &ecKey, rng);
|
|
} else {
|
|
ret = wc_SignCert(newCert.bodySz, newCert.sigType, derBuf, sizeof(derBuf),
|
|
&rsaKey, NULL, rng);
|
|
}
|
|
if (ret <= 0) {
|
|
fprintf(stderr, "Sign Cert failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
derSz = ret;
|
|
|
|
ret = wc_DerToPem(derBuf, derSz, pemBuf, sizeof(pemBuf), CERT_TYPE);
|
|
if (ret <= 0) {
|
|
fprintf(stderr, "DER to PEM failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
pemSz = ret;
|
|
|
|
ret = write_file(pemBuf, pemSz, certpath);
|
|
if (ret != 0) {
|
|
fprintf(stderr, "Write Cert failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (type == EC_KEY_TYPE) {
|
|
wc_ecc_free(&ecKey);
|
|
} else {
|
|
wc_FreeRsaKey(&rsaKey);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int dokey(WC_RNG *rng, int type, char **arg) {
|
|
ecc_key ecKey;
|
|
RsaKey rsaKey;
|
|
int ret;
|
|
int curve = ECC_SECP256R1;
|
|
int keySz = WOLFSSL_MIN_RSA_BITS;
|
|
int exp = WC_RSA_EXPONENT;
|
|
char *path = NULL;
|
|
bool pem = true;
|
|
|
|
while (*arg && **arg == '-') {
|
|
if (!strncmp(*arg, "-out", 4) && arg[1]) {
|
|
path = arg[1];
|
|
arg++;
|
|
} else if (!strncmp(*arg, "-3", 2)) {
|
|
exp = 3;
|
|
} else if (!strncmp(*arg, "-der", 4)) {
|
|
pem = false;
|
|
}
|
|
arg++;
|
|
}
|
|
|
|
if (*arg && type == RSA_KEY_TYPE) {
|
|
keySz = (unsigned int)atoi(*arg);
|
|
} else if (*arg) {
|
|
if (!strncmp(*arg, "P-256", 5)) {
|
|
curve = ECC_SECP256R1;
|
|
} else if (!strncmp(*arg, "P-384", 5)) {
|
|
curve = ECC_SECP384R1;
|
|
} else if (!strncmp(*arg, "P-521", 5)) {
|
|
curve = ECC_SECP521R1;
|
|
} else {
|
|
fprintf(stderr, "Invalid Curve Name: %s\n", *arg);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
ret = gen_key(rng, &ecKey, &rsaKey, type, keySz, exp, curve);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
ret = write_key(&ecKey, &rsaKey, type, keySz, path, pem);
|
|
|
|
if (type == EC_KEY_TYPE) {
|
|
wc_ecc_free(&ecKey);
|
|
} else {
|
|
wc_FreeRsaKey(&rsaKey);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
int ret;
|
|
WC_RNG rng;
|
|
ret = wc_InitRng(&rng);
|
|
if (ret != 0) {
|
|
fprintf(stderr, "Init Rng failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (argv[1]) {
|
|
if (!strncmp(argv[1], "eckey", 5))
|
|
return dokey(&rng, EC_KEY_TYPE, argv + 2);
|
|
|
|
if (!strncmp(argv[1], "rsakey", 5))
|
|
return dokey(&rng, RSA_KEY_TYPE, argv + 2);
|
|
|
|
if (!strncmp(argv[1], "selfsigned", 10))
|
|
return selfsigned(&rng, argv + 2);
|
|
}
|
|
|
|
fprintf(stderr, "PX5G X.509 Certificate Generator Utilit using WolfSSL\n\n");
|
|
fprintf(stderr, "Usage: [eckey|rsakey|selfsigned]\n");
|
|
return 1;
|
|
}
|