#include <openssl/opensslconf.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/dsa.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
static struct {
const EVP_CIPHER *enc;
char *infile;
int informat;
int modulus;
int noout;
char *outfile;
int outformat;
char *passargin;
char *passargout;
int pubin;
int pubout;
int pvk_encr;
int text;
} cfg;
static int
dsa_opt_enc(int argc, char **argv, int *argsused)
{
char *name = argv[0];
if (*name++ != '-')
return (1);
if ((cfg.enc = EVP_get_cipherbyname(name)) != NULL) {
*argsused = 1;
return (0);
}
return (1);
}
static const struct option dsa_options[] = {
{
.name = "in",
.argname = "file",
.desc = "Input file (default stdin)",
.type = OPTION_ARG,
.opt.arg = &cfg.infile,
},
{
.name = "inform",
.argname = "format",
.desc = "Input format (PEM (default) or any other supported"
" format)",
.type = OPTION_ARG_FORMAT,
.opt.value = &cfg.informat,
},
{
.name = "modulus",
.desc = "Print the DSA public value",
.type = OPTION_FLAG,
.opt.flag = &cfg.modulus,
},
{
.name = "noout",
.desc = "No output",
.type = OPTION_FLAG,
.opt.flag = &cfg.noout,
},
{
.name = "out",
.argname = "file",
.desc = "Output file (default stdout)",
.type = OPTION_ARG,
.opt.arg = &cfg.outfile,
},
{
.name = "outform",
.argname = "format",
.desc = "Output format (DER, MSBLOB, PEM (default) or PVK)",
.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 = "pubin",
.desc = "Read a public key from the input file instead of"
" private key",
.type = OPTION_FLAG,
.opt.flag = &cfg.pubin,
},
{
.name = "pubout",
.desc = "Output a public key instead of private key",
.type = OPTION_FLAG,
.opt.flag = &cfg.pubout,
},
{
.name = "pvk-none",
.desc = "PVK encryption level",
.type = OPTION_VALUE,
.value = 0,
.opt.value = &cfg.pvk_encr,
},
{
.name = "pvk-strong",
.desc = "PVK encryption level (default)",
.type = OPTION_VALUE,
.value = 2,
.opt.value = &cfg.pvk_encr,
},
{
.name = "pvk-weak",
.desc = "PVK encryption level",
.type = OPTION_VALUE,
.value = 1,
.opt.value = &cfg.pvk_encr,
},
{
.name = "text",
.desc = "Print the key in text form",
.type = OPTION_FLAG,
.opt.flag = &cfg.text,
},
{
.name = NULL,
.type = OPTION_ARGV_FUNC,
.opt.argvfunc = dsa_opt_enc,
},
{ NULL },
};
static void
dsa_usage(void)
{
int n = 0;
fprintf(stderr,
"usage: dsa [-in file] [-inform format] [-modulus] [-noout]\n"
" [-out file] [-outform format] [-passin src] [-passout src]\n"
" [-pubin] [-pubout] [-pvk-none | -pvk-strong | -pvk-weak]\n"
" [-text] [-ciphername]\n\n");
options_usage(dsa_options);
fprintf(stderr, "\n");
fprintf(stderr, "Valid ciphername values:\n\n");
OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_cipher, &n);
fprintf(stderr, "\n");
}
int
dsa_main(int argc, char **argv)
{
int ret = 1;
DSA *dsa = NULL;
int i;
BIO *in = NULL, *out = NULL;
char *passin = NULL, *passout = NULL;
if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
perror("pledge");
exit(1);
}
memset(&cfg, 0, sizeof(cfg));
cfg.pvk_encr = 2;
cfg.informat = FORMAT_PEM;
cfg.outformat = FORMAT_PEM;
if (options_parse(argc, argv, dsa_options, NULL, NULL) != 0) {
dsa_usage();
goto end;
}
if (!app_passwd(bio_err, cfg.passargin, cfg.passargout,
&passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
in = BIO_new(BIO_s_file());
out = BIO_new(BIO_s_file());
if (in == NULL || out == NULL) {
ERR_print_errors(bio_err);
goto end;
}
if (cfg.infile == NULL)
BIO_set_fp(in, stdin, BIO_NOCLOSE);
else {
if (BIO_read_filename(in, cfg.infile) <= 0) {
perror(cfg.infile);
goto end;
}
}
BIO_printf(bio_err, "read DSA key\n");
{
EVP_PKEY *pkey;
if (cfg.pubin)
pkey = load_pubkey(bio_err, cfg.infile,
cfg.informat, 1, passin, "Public Key");
else
pkey = load_key(bio_err, cfg.infile,
cfg.informat, 1, passin, "Private Key");
if (pkey) {
dsa = EVP_PKEY_get1_DSA(pkey);
EVP_PKEY_free(pkey);
}
}
if (dsa == NULL) {
BIO_printf(bio_err, "unable to load Key\n");
ERR_print_errors(bio_err);
goto end;
}
if (cfg.outfile == NULL) {
BIO_set_fp(out, stdout, BIO_NOCLOSE);
} else {
if (BIO_write_filename(out, cfg.outfile) <= 0) {
perror(cfg.outfile);
goto end;
}
}
if (cfg.text) {
if (!DSA_print(out, dsa, 0)) {
perror(cfg.outfile);
ERR_print_errors(bio_err);
goto end;
}
}
if (cfg.modulus) {
fprintf(stdout, "Public Key=");
BN_print(out, DSA_get0_pub_key(dsa));
fprintf(stdout, "\n");
}
if (cfg.noout)
goto end;
BIO_printf(bio_err, "writing DSA key\n");
if (cfg.outformat == FORMAT_ASN1) {
if (cfg.pubin || cfg.pubout)
i = i2d_DSA_PUBKEY_bio(out, dsa);
else
i = i2d_DSAPrivateKey_bio(out, dsa);
} else if (cfg.outformat == FORMAT_PEM) {
if (cfg.pubin || cfg.pubout)
i = PEM_write_bio_DSA_PUBKEY(out, dsa);
else
i = PEM_write_bio_DSAPrivateKey(out, dsa, cfg.enc,
NULL, 0, NULL, passout);
#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_RC4)
} else if (cfg.outformat == FORMAT_MSBLOB ||
cfg.outformat == FORMAT_PVK) {
EVP_PKEY *pk;
pk = EVP_PKEY_new();
EVP_PKEY_set1_DSA(pk, dsa);
if (cfg.outformat == FORMAT_PVK)
i = i2b_PVK_bio(out, pk, cfg.pvk_encr, 0,
passout);
else if (cfg.pubin || cfg.pubout)
i = i2b_PublicKey_bio(out, pk);
else
i = i2b_PrivateKey_bio(out, pk);
EVP_PKEY_free(pk);
#endif
} else {
BIO_printf(bio_err, "bad output format specified for outfile\n");
goto end;
}
if (i <= 0) {
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);
DSA_free(dsa);
free(passin);
free(passout);
return (ret);
}
