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openssl/apps/pkcs8.c
Dr. David von Oheimb d5c4a8aecc APPS/pkcs8: fix case where infile and outfile are the same 
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25552)
2024-10-04 12:09:33 +02:00

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/*
* Copyright 1999-2023 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include "progs.h"
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pkcs12.h>
#define STR(a) XSTR(a)
#define XSTR(a) #a
typedef enum OPTION_choice {
OPT_COMMON,
OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
OPT_TOPK8, OPT_NOITER, OPT_NOCRYPT,
#ifndef OPENSSL_NO_SCRYPT
OPT_SCRYPT, OPT_SCRYPT_N, OPT_SCRYPT_R, OPT_SCRYPT_P,
#endif
OPT_V2, OPT_V1, OPT_V2PRF, OPT_ITER, OPT_PASSIN, OPT_PASSOUT,
OPT_TRADITIONAL,
OPT_SALTLEN,
OPT_R_ENUM, OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS pkcs8_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
{"v1", OPT_V1, 's', "Use PKCS#5 v1.5 and cipher"},
{"v2", OPT_V2, 's', "Use PKCS#5 v2.0 and cipher"},
{"v2prf", OPT_V2PRF, 's', "Set the PRF algorithm to use with PKCS#5 v2.0"},
OPT_SECTION("Input"),
{"in", OPT_IN, '<', "Input file"},
{"inform", OPT_INFORM, 'F', "Input format (DER or PEM)"},
{"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
{"nocrypt", OPT_NOCRYPT, '-', "Use or expect unencrypted private key"},
OPT_SECTION("Output"),
{"out", OPT_OUT, '>', "Output file"},
{"outform", OPT_OUTFORM, 'F', "Output format (DER or PEM)"},
{"topk8", OPT_TOPK8, '-', "Output PKCS8 file"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
{"traditional", OPT_TRADITIONAL, '-', "use traditional format private key"},
{"iter", OPT_ITER, 'p', "Specify the iteration count"},
{"noiter", OPT_NOITER, '-', "Use 1 as iteration count"},
{"saltlen", OPT_SALTLEN, 'p', "Specify the salt length (in bytes)"},
{OPT_MORE_STR, 0, 0, "Default: 8 (For PBE1) or 16 (for PBE2)"},
#ifndef OPENSSL_NO_SCRYPT
OPT_SECTION("Scrypt"),
{"scrypt", OPT_SCRYPT, '-', "Use scrypt algorithm"},
{"scrypt_N", OPT_SCRYPT_N, 's', "Set scrypt N parameter"},
{"scrypt_r", OPT_SCRYPT_R, 's', "Set scrypt r parameter"},
{"scrypt_p", OPT_SCRYPT_P, 's', "Set scrypt p parameter"},
#endif
OPT_R_OPTIONS,
OPT_PROV_OPTIONS,
{NULL}
};
int pkcs8_main(int argc, char **argv)
{
BIO *in = NULL, *out = NULL;
ENGINE *e = NULL;
EVP_PKEY *pkey = NULL;
PKCS8_PRIV_KEY_INFO *p8inf = NULL;
X509_SIG *p8 = NULL;
EVP_CIPHER *cipher = NULL;
char *infile = NULL, *outfile = NULL, *ciphername = NULL;
char *passinarg = NULL, *passoutarg = NULL, *prog;
#ifndef OPENSSL_NO_UI_CONSOLE
char pass[APP_PASS_LEN];
#endif
char *passin = NULL, *passout = NULL, *p8pass = NULL;
OPTION_CHOICE o;
int nocrypt = 0, ret = 1, iter = PKCS12_DEFAULT_ITER;
int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, topk8 = 0, pbe_nid = -1;
int private = 0, traditional = 0;
#ifndef OPENSSL_NO_SCRYPT
long scrypt_N = 0, scrypt_r = 0, scrypt_p = 0;
#endif
int saltlen = 0; /* A value of zero chooses the default */
prog = opt_init(argc, argv, pkcs8_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(pkcs8_options);
ret = 0;
goto end;
case OPT_INFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &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_TOPK8:
topk8 = 1;
break;
case OPT_NOITER:
iter = 1;
break;
case OPT_NOCRYPT:
nocrypt = 1;
break;
case OPT_R_CASES:
if (!opt_rand(o))
goto end;
break;
case OPT_PROV_CASES:
if (!opt_provider(o))
goto end;
break;
case OPT_TRADITIONAL:
traditional = 1;
break;
case OPT_V2:
ciphername = opt_arg();
break;
case OPT_V1:
pbe_nid = OBJ_txt2nid(opt_arg());
if (pbe_nid == NID_undef) {
BIO_printf(bio_err,
"%s: Unknown PBE algorithm %s\n", prog, opt_arg());
goto opthelp;
}
break;
case OPT_V2PRF:
pbe_nid = OBJ_txt2nid(opt_arg());
if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, pbe_nid, NULL, NULL, 0)) {
BIO_printf(bio_err,
"%s: Unknown PRF algorithm %s\n", prog, opt_arg());
goto opthelp;
}
if (cipher == NULL)
cipher = (EVP_CIPHER *)EVP_aes_256_cbc();
break;
case OPT_ITER:
iter = opt_int_arg();
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;
#ifndef OPENSSL_NO_SCRYPT
case OPT_SCRYPT:
scrypt_N = 16384;
scrypt_r = 8;
scrypt_p = 1;
if (cipher == NULL)
cipher = (EVP_CIPHER *)EVP_aes_256_cbc();
break;
case OPT_SCRYPT_N:
if (!opt_long(opt_arg(), &scrypt_N) || scrypt_N <= 0)
goto opthelp;
break;
case OPT_SCRYPT_R:
if (!opt_long(opt_arg(), &scrypt_r) || scrypt_r <= 0)
goto opthelp;
break;
case OPT_SCRYPT_P:
if (!opt_long(opt_arg(), &scrypt_p) || scrypt_p <= 0)
goto opthelp;
break;
#endif
case OPT_SALTLEN:
if (!opt_int(opt_arg(), &saltlen))
goto opthelp;
break;
}
}
/* No extra arguments. */
if (!opt_check_rest_arg(NULL))
goto opthelp;
private = 1;
if (!app_RAND_load())
goto end;
if (ciphername != NULL) {
if (!opt_cipher(ciphername, &cipher))
goto opthelp;
}
if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
if ((pbe_nid == -1) && cipher == NULL)
cipher = (EVP_CIPHER *)EVP_aes_256_cbc();
in = bio_open_default(infile, 'r',
informat == FORMAT_UNDEF ? FORMAT_PEM : informat);
if (in == NULL)
goto end;
if (topk8) {
pkey = load_key(infile, informat, 1, passin, e, "key");
if (pkey == NULL)
goto end;
if ((p8inf = EVP_PKEY2PKCS8(pkey)) == NULL) {
BIO_printf(bio_err, "Error converting key\n");
ERR_print_errors(bio_err);
goto end;
}
if ((out = bio_open_owner(outfile, outformat, private)) == NULL)
goto end;
if (nocrypt) {
assert(private);
if (outformat == FORMAT_PEM) {
PEM_write_bio_PKCS8_PRIV_KEY_INFO(out, p8inf);
} else if (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 {
X509_ALGOR *pbe;
if (cipher) {
#ifndef OPENSSL_NO_SCRYPT
if (scrypt_N && scrypt_r && scrypt_p)
pbe = PKCS5_pbe2_set_scrypt(cipher, NULL, saltlen, NULL,
scrypt_N, scrypt_r, scrypt_p);
else
#endif
pbe = PKCS5_pbe2_set_iv(cipher, iter, NULL, saltlen, NULL,
pbe_nid);
} else {
pbe = PKCS5_pbe_set(pbe_nid, iter, NULL, saltlen);
}
if (pbe == NULL) {
BIO_printf(bio_err, "Error setting PBE algorithm\n");
ERR_print_errors(bio_err);
goto end;
}
if (passout != NULL) {
p8pass = passout;
} else if (1) {
/* To avoid bit rot */
#ifndef OPENSSL_NO_UI_CONSOLE
p8pass = pass;
if (EVP_read_pw_string
(pass, sizeof(pass), "Enter Encryption Password:", 1)) {
X509_ALGOR_free(pbe);
goto end;
}
} else {
#endif
BIO_printf(bio_err, "Password required\n");
goto end;
}
p8 = PKCS8_set0_pbe(p8pass, strlen(p8pass), p8inf, pbe);
if (p8 == NULL) {
X509_ALGOR_free(pbe);
BIO_printf(bio_err, "Error encrypting key\n");
ERR_print_errors(bio_err);
goto end;
}
assert(private);
if (outformat == FORMAT_PEM)
PEM_write_bio_PKCS8(out, p8);
else if (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 (nocrypt) {
if (informat == FORMAT_PEM || informat == FORMAT_UNDEF) {
p8inf = PEM_read_bio_PKCS8_PRIV_KEY_INFO(in, NULL, NULL, NULL);
} else if (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 (informat == FORMAT_PEM || informat == FORMAT_UNDEF) {
p8 = PEM_read_bio_PKCS8(in, NULL, NULL, NULL);
} else if (informat == FORMAT_ASN1) {
p8 = d2i_PKCS8_bio(in, NULL);
} else {
BIO_printf(bio_err, "Bad format specified for key\n");
goto end;
}
if (p8 == NULL) {
BIO_printf(bio_err, "Error reading key\n");
ERR_print_errors(bio_err);
goto end;
}
if (passin != NULL) {
p8pass = passin;
} else if (1) {
#ifndef OPENSSL_NO_UI_CONSOLE
p8pass = pass;
if (EVP_read_pw_string(pass, sizeof(pass), "Enter Password:", 0)) {
BIO_printf(bio_err, "Can't read Password\n");
goto end;
}
} else {
#endif
BIO_printf(bio_err, "Password required\n");
goto end;
}
p8inf = PKCS8_decrypt(p8, p8pass, strlen(p8pass));
}
if (p8inf == NULL) {
BIO_printf(bio_err, "Error decrypting key\n");
ERR_print_errors(bio_err);
goto end;
}
if ((pkey = EVP_PKCS82PKEY(p8inf)) == NULL) {
BIO_printf(bio_err, "Error converting key\n");
ERR_print_errors(bio_err);
goto end;
}
assert(private);
out = bio_open_owner(outfile, outformat, private);
if (out == NULL)
goto end;
if (outformat == FORMAT_PEM) {
if (traditional)
PEM_write_bio_PrivateKey_traditional(out, pkey, NULL, NULL, 0,
NULL, passout);
else
PEM_write_bio_PrivateKey(out, pkey, NULL, NULL, 0, NULL, passout);
} else if (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);
EVP_CIPHER_free(cipher);
release_engine(e);
BIO_free_all(out);
BIO_free(in);
OPENSSL_free(passin);
OPENSSL_free(passout);
return ret;
}
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