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/*
* Copyright 2000-2021 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 <openssl/opensslconf.h>
#include "apps.h"
#include "progs.h"
#include <string.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#define RSA_SIGN 1
#define RSA_VERIFY 2
#define RSA_ENCRYPT 3
#define RSA_DECRYPT 4
#define KEY_PRIVKEY 1
#define KEY_PUBKEY 2
#define KEY_CERT 3
typedef enum OPTION_choice {
OPT_COMMON,
OPT_ENGINE, OPT_IN, OPT_OUT, OPT_ASN1PARSE, OPT_HEXDUMP,
OPT_RSA_RAW, OPT_OAEP, OPT_PKCS, OPT_X931,
OPT_SIGN, OPT_VERIFY, OPT_REV, OPT_ENCRYPT, OPT_DECRYPT,
OPT_PUBIN, OPT_CERTIN, OPT_INKEY, OPT_PASSIN, OPT_KEYFORM,
OPT_R_ENUM, OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS rsautl_options[] = {
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
{"sign", OPT_SIGN, '-', "Sign with private key"},
{"verify", OPT_VERIFY, '-', "Verify with public key"},
{"encrypt", OPT_ENCRYPT, '-', "Encrypt with public key"},
{"decrypt", OPT_DECRYPT, '-', "Decrypt with private key"},
#ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
#endif
OPT_SECTION("Input"),
{"in", OPT_IN, '<', "Input file"},
{"inkey", OPT_INKEY, 's', "Input key, by default an RSA private key"},
{"keyform", OPT_KEYFORM, 'E', "Private key format (ENGINE, other values ignored)"},
{"pubin", OPT_PUBIN, '-', "Input key is an RSA public pkey"},
{"certin", OPT_CERTIN, '-', "Input is a cert carrying an RSA public key"},
{"rev", OPT_REV, '-', "Reverse the order of the input buffer"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
OPT_SECTION("Output"),
{"out", OPT_OUT, '>', "Output file"},
{"raw", OPT_RSA_RAW, '-', "Use no padding"},
{"pkcs", OPT_PKCS, '-', "Use PKCS#1 v1.5 padding (default)"},
{"x931", OPT_X931, '-', "Use ANSI X9.31 padding"},
{"oaep", OPT_OAEP, '-', "Use PKCS#1 OAEP"},
{"asn1parse", OPT_ASN1PARSE, '-',
"Run output through asn1parse; useful with -verify"},
{"hexdump", OPT_HEXDUMP, '-', "Hex dump output"},
OPT_R_OPTIONS,
OPT_PROV_OPTIONS,
{NULL}
};
int rsautl_main(int argc, char **argv)
{
BIO *in = NULL, *out = NULL;
ENGINE *e = NULL;
EVP_PKEY *pkey = NULL;
EVP_PKEY_CTX *ctx = NULL;
X509 *x;
char *infile = NULL, *outfile = NULL, *keyfile = NULL;
char *passinarg = NULL, *passin = NULL, *prog;
char rsa_mode = RSA_VERIFY, key_type = KEY_PRIVKEY;
unsigned char *rsa_in = NULL, *rsa_out = NULL, pad = RSA_PKCS1_PADDING;
size_t rsa_inlen, rsa_outlen = 0;
int keyformat = FORMAT_UNDEF, keysize, ret = 1, rv;
int hexdump = 0, asn1parse = 0, need_priv = 0, rev = 0;
OPTION_CHOICE o;
prog = opt_init(argc, argv, rsautl_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(rsautl_options);
ret = 0;
goto end;
case OPT_KEYFORM:
if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyformat))
goto opthelp;
break;
case OPT_IN:
infile = opt_arg();
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_ENGINE:
e = setup_engine(opt_arg(), 0);
break;
case OPT_ASN1PARSE:
asn1parse = 1;
break;
case OPT_HEXDUMP:
hexdump = 1;
break;
case OPT_RSA_RAW:
pad = RSA_NO_PADDING;
break;
case OPT_OAEP:
pad = RSA_PKCS1_OAEP_PADDING;
break;
case OPT_PKCS:
pad = RSA_PKCS1_PADDING;
break;
case OPT_X931:
pad = RSA_X931_PADDING;
break;
case OPT_SIGN:
rsa_mode = RSA_SIGN;
need_priv = 1;
break;
case OPT_VERIFY:
rsa_mode = RSA_VERIFY;
break;
case OPT_REV:
rev = 1;
break;
case OPT_ENCRYPT:
rsa_mode = RSA_ENCRYPT;
break;
case OPT_DECRYPT:
rsa_mode = RSA_DECRYPT;
need_priv = 1;
break;
case OPT_PUBIN:
key_type = KEY_PUBKEY;
break;
case OPT_CERTIN:
key_type = KEY_CERT;
break;
case OPT_INKEY:
keyfile = opt_arg();
break;
case OPT_PASSIN:
passinarg = opt_arg();
break;
case OPT_R_CASES:
if (!opt_rand(o))
goto end;
break;
case OPT_PROV_CASES:
if (!opt_provider(o))
goto end;
break;
}
}
/* No extra arguments. */
if (!opt_check_rest_arg(NULL))
goto opthelp;
if (!app_RAND_load())
goto end;
if (need_priv && (key_type != KEY_PRIVKEY)) {
BIO_printf(bio_err, "A private key is needed for this operation\n");
goto end;
}
if (!app_passwd(passinarg, NULL, &passin, NULL)) {
BIO_printf(bio_err, "Error getting password\n");
goto end;
}
switch (key_type) {
case KEY_PRIVKEY:
pkey = load_key(keyfile, keyformat, 0, passin, e, "private key");
break;
case KEY_PUBKEY:
pkey = load_pubkey(keyfile, keyformat, 0, NULL, e, "public key");
break;
case KEY_CERT:
x = load_cert(keyfile, FORMAT_UNDEF, "Certificate");
if (x) {
pkey = X509_get_pubkey(x);
X509_free(x);
}
break;
}
if (pkey == NULL)
return 1;
in = bio_open_default(infile, 'r', FORMAT_BINARY);
if (in == NULL)
goto end;
out = bio_open_default(outfile, 'w', FORMAT_BINARY);
if (out == NULL)
goto end;
keysize = EVP_PKEY_get_size(pkey);
rsa_in = app_malloc(keysize * 2, "hold rsa key");
rsa_out = app_malloc(keysize, "output rsa key");
rsa_outlen = keysize;
/* Read the input data */
rv = BIO_read(in, rsa_in, keysize * 2);
if (rv < 0) {
BIO_printf(bio_err, "Error reading input Data\n");
goto end;
}
rsa_inlen = rv;
if (rev) {
size_t i;
unsigned char ctmp;
for (i = 0; i < rsa_inlen / 2; i++) {
ctmp = rsa_in[i];
rsa_in[i] = rsa_in[rsa_inlen - 1 - i];
rsa_in[rsa_inlen - 1 - i] = ctmp;
}
}
if ((ctx = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL)) == NULL)
goto end;
switch (rsa_mode) {
case RSA_VERIFY:
rv = EVP_PKEY_verify_recover_init(ctx) > 0
&& EVP_PKEY_CTX_set_rsa_padding(ctx, pad) > 0
&& EVP_PKEY_verify_recover(ctx, rsa_out, &rsa_outlen,
rsa_in, rsa_inlen) > 0;
break;
case RSA_SIGN:
rv = EVP_PKEY_sign_init(ctx) > 0
&& EVP_PKEY_CTX_set_rsa_padding(ctx, pad) > 0
&& EVP_PKEY_sign(ctx, rsa_out, &rsa_outlen, rsa_in, rsa_inlen) > 0;
break;
case RSA_ENCRYPT:
rv = EVP_PKEY_encrypt_init(ctx) > 0
&& EVP_PKEY_CTX_set_rsa_padding(ctx, pad) > 0
&& EVP_PKEY_encrypt(ctx, rsa_out, &rsa_outlen, rsa_in, rsa_inlen) > 0;
break;
case RSA_DECRYPT:
rv = EVP_PKEY_decrypt_init(ctx) > 0
&& EVP_PKEY_CTX_set_rsa_padding(ctx, pad) > 0
&& EVP_PKEY_decrypt(ctx, rsa_out, &rsa_outlen, rsa_in, rsa_inlen) > 0;
break;
}
if (!rv) {
BIO_printf(bio_err, "RSA operation error\n");
ERR_print_errors(bio_err);
goto end;
}
ret = 0;
if (asn1parse) {
if (!ASN1_parse_dump(out, rsa_out, rsa_outlen, 1, -1)) {
ERR_print_errors(bio_err);
}
} else if (hexdump) {
BIO_dump(out, (char *)rsa_out, rsa_outlen);
} else {
BIO_write(out, rsa_out, rsa_outlen);
}
end:
EVP_PKEY_CTX_free(ctx);
EVP_PKEY_free(pkey);
release_engine(e);
BIO_free(in);
BIO_free_all(out);
OPENSSL_free(rsa_in);
OPENSSL_free(rsa_out);
OPENSSL_free(passin);
return ret;
}
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