#include <stdio.h>
#include <string.h>
#include "apps.h"
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
static struct {
const EVP_CIPHER *cipher;
char *infile;
int informat;
int iter;
int nocrypt;
char *outfile;
int outformat;
char *passargin;
char *passargout;
int pbe_nid;
int topk8;
} cfg;
static int
pkcs8_opt_v1(char *arg)
{
if ((cfg.pbe_nid = OBJ_txt2nid(arg)) == NID_undef) {
fprintf(stderr, "Unknown PBE algorithm '%s'\n", arg);
return (1);
}
return (0);
}
static int
pkcs8_opt_v2(char *arg)
{
if ((cfg.cipher = EVP_get_cipherbyname(arg)) == NULL) {
fprintf(stderr, "Unknown cipher '%s'\n", arg);
return (1);
}
return (0);
}
static const struct option pkcs8_options[] = {
{
.name = "in",
.argname = "file",
.desc = "Input file (default stdin)",
.type = OPTION_ARG,
.opt.arg = &cfg.infile,
},
{
.name = "inform",
.argname = "der | pem",
.desc = "Input format (default PEM)",
.type = OPTION_ARG_FORMAT,
.opt.value = &cfg.informat,
},
{
.name = "nocrypt",
.desc = "Use or expect unencrypted private key",
.type = OPTION_FLAG,
.opt.flag = &cfg.nocrypt,
},
{
.name = "noiter",
.desc = "Use 1 as iteration count",
.type = OPTION_VALUE,
.value = 1,
.opt.value = &cfg.iter,
},
{
.name = "out",
.argname = "file",
.desc = "Output file (default stdout)",
.type = OPTION_ARG,
.opt.arg = &cfg.outfile,
},
{
.name = "outform",
.argname = "der | pem",
.desc = "Output format (default PEM)",
.type = OPTION_ARG_FORMAT,
.opt.value = &cfg.outformat,
},
{
.name = "passin",
.argname = "source",
.desc = "Input file passphrase source",
.type = OPTION_ARG,
.opt.arg = &cfg.passargin,
},
{
.name = "passout",
.argname = "source",
.desc = "Output file passphrase source",
.type = OPTION_ARG,
.opt.arg = &cfg.passargout,
},
{
.name = "topk8",
.desc = "Read traditional format key and write PKCS#8 format"
" key",
.type = OPTION_FLAG,
.opt.flag = &cfg.topk8,
},
{
.name = "v1",
.argname = "algorithm",
.desc = "Use PKCS#5 v1.5 or PKCS#12 with given algorithm",
.type = OPTION_ARG_FUNC,
.opt.argfunc = pkcs8_opt_v1,
},
{
.name = "v2",
.argname = "cipher",
.desc = "Use PKCS#5 v2.0 with given cipher",
.type = OPTION_ARG_FUNC,
.opt.argfunc = pkcs8_opt_v2,
},
{ NULL },
};
static void
pkcs8_usage(void)
{
fprintf(stderr, "usage: pkcs8 [-in file] [inform der | pem] "
"[-nocrypt] [-noiter]\n"
" [-out file] [-outform der | pem] [-passin arg]\n"
" [-passout arg] [-topk8] [-v1 alg] [-v2 alg]\n\n");
options_usage(pkcs8_options);
}
int
pkcs8_main(int argc, char **argv)
{
BIO *in = NULL, *out = NULL;
X509_SIG *p8 = NULL;
PKCS8_PRIV_KEY_INFO *p8inf = NULL;
EVP_PKEY *pkey = NULL;
char pass[50], *passin = NULL, *passout = NULL, *p8pass = NULL;
int ret = 1;
if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
perror("pledge");
exit(1);
}
memset(&cfg, 0, sizeof(cfg));
cfg.iter = PKCS12_DEFAULT_ITER;
cfg.informat = FORMAT_PEM;
cfg.outformat = FORMAT_PEM;
cfg.pbe_nid = -1;
if (options_parse(argc, argv, pkcs8_options, NULL, NULL) != 0) {
pkcs8_usage();
return (1);
}
if (!app_passwd(bio_err, cfg.passargin,
cfg.passargout, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
if (cfg.pbe_nid == -1 && cfg.cipher == NULL)
cfg.cipher = EVP_aes_256_cbc();
if (cfg.infile) {
if (!(in = BIO_new_file(cfg.infile, "rb"))) {
BIO_printf(bio_err,
"Can't open input file '%s'\n",
cfg.infile);
goto end;
}
} else
in = BIO_new_fp(stdin, BIO_NOCLOSE);
if (cfg.outfile) {
if (!(out = BIO_new_file(cfg.outfile, "wb"))) {
BIO_printf(bio_err, "Can't open output file '%s'\n",
cfg.outfile);
goto end;
}
} else {
out = BIO_new_fp(stdout, BIO_NOCLOSE);
}
if (cfg.topk8) {
pkey = load_key(bio_err, cfg.infile,
cfg.informat, 1, passin, "key");
if (!pkey)
goto end;
if (!(p8inf = EVP_PKEY2PKCS8(pkey))) {
BIO_printf(bio_err, "Error converting key\n");
ERR_print_errors(bio_err);
goto end;
}
if (cfg.nocrypt) {
if (cfg.outformat == FORMAT_PEM)
PEM_write_bio_PKCS8_PRIV_KEY_INFO(out, p8inf);
else if (cfg.outformat == FORMAT_ASN1)
i2d_PKCS8_PRIV_KEY_INFO_bio(out, p8inf);
else {
BIO_printf(bio_err,
"Bad format specified for key\n");
goto end;
}
} else {
if (passout)
p8pass = passout;
else {
p8pass = pass;
if (EVP_read_pw_string(pass, sizeof pass,
"Enter Encryption Password:", 1))
goto end;
}
if (!(p8 = PKCS8_encrypt(cfg.pbe_nid,
cfg.cipher, p8pass, strlen(p8pass),
NULL, 0, cfg.iter, p8inf))) {
BIO_printf(bio_err, "Error encrypting key\n");
ERR_print_errors(bio_err);
goto end;
}
if (cfg.outformat == FORMAT_PEM)
PEM_write_bio_PKCS8(out, p8);
else if (cfg.outformat == FORMAT_ASN1)
i2d_PKCS8_bio(out, p8);
else {
BIO_printf(bio_err,
"Bad format specified for key\n");
goto end;
}
}
ret = 0;
goto end;
}
if (cfg.nocrypt) {
if (cfg.informat == FORMAT_PEM)
p8inf = PEM_read_bio_PKCS8_PRIV_KEY_INFO(in, NULL,
NULL, NULL);
else if (cfg.informat == FORMAT_ASN1)
p8inf = d2i_PKCS8_PRIV_KEY_INFO_bio(in, NULL);
else {
BIO_printf(bio_err, "Bad format specified for key\n");
goto end;
}
} else {
if (cfg.informat == FORMAT_PEM)
p8 = PEM_read_bio_PKCS8(in, NULL, NULL, NULL);
else if (cfg.informat == FORMAT_ASN1)
p8 = d2i_PKCS8_bio(in, NULL);
else {
BIO_printf(bio_err, "Bad format specified for key\n");
goto end;
}
if (!p8) {
BIO_printf(bio_err, "Error reading key\n");
ERR_print_errors(bio_err);
goto end;
}
if (passin)
p8pass = passin;
else {
p8pass = pass;
EVP_read_pw_string(pass, sizeof pass,
"Enter Password:", 0);
}
p8inf = PKCS8_decrypt(p8, p8pass, strlen(p8pass));
}
if (!p8inf) {
BIO_printf(bio_err, "Error decrypting key\n");
ERR_print_errors(bio_err);
goto end;
}
if (!(pkey = EVP_PKCS82PKEY(p8inf))) {
BIO_printf(bio_err, "Error converting key\n");
ERR_print_errors(bio_err);
goto end;
}
if (cfg.outformat == FORMAT_PEM)
PEM_write_bio_PrivateKey(out, pkey, NULL, NULL, 0, NULL,
passout);
else if (cfg.outformat == FORMAT_ASN1)
i2d_PrivateKey_bio(out, pkey);
else {
BIO_printf(bio_err, "Bad format specified for key\n");
goto end;
}
ret = 0;
end:
X509_SIG_free(p8);
PKCS8_PRIV_KEY_INFO_free(p8inf);
EVP_PKEY_free(pkey);
BIO_free_all(out);
BIO_free(in);
free(passin);
free(passout);
return ret;
}
