pineapple-src/externals/libressl/crypto/asn1/n_pkey.c
2020-12-28 15:15:37 +00:00

432 lines
12 KiB
C
Executable file

/* $OpenBSD: n_pkey.c,v 1.32 2018/08/05 13:35:45 bcook Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <string.h>
#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_RSA
#include <openssl/asn1t.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/rsa.h>
#include <openssl/x509.h>
#ifndef OPENSSL_NO_RC4
typedef struct netscape_pkey_st {
long version;
X509_ALGOR *algor;
ASN1_OCTET_STRING *private_key;
} NETSCAPE_PKEY;
typedef struct netscape_encrypted_pkey_st {
ASN1_OCTET_STRING *os;
/* This is the same structure as DigestInfo so use it:
* although this isn't really anything to do with
* digests.
*/
X509_SIG *enckey;
} NETSCAPE_ENCRYPTED_PKEY;
static const ASN1_AUX NETSCAPE_ENCRYPTED_PKEY_aux = {
.flags = ASN1_AFLG_BROKEN,
};
static const ASN1_TEMPLATE NETSCAPE_ENCRYPTED_PKEY_seq_tt[] = {
{
.offset = offsetof(NETSCAPE_ENCRYPTED_PKEY, os),
.field_name = "os",
.item = &ASN1_OCTET_STRING_it,
},
{
.offset = offsetof(NETSCAPE_ENCRYPTED_PKEY, enckey),
.field_name = "enckey",
.item = &X509_SIG_it,
},
};
const ASN1_ITEM NETSCAPE_ENCRYPTED_PKEY_it = {
.itype = ASN1_ITYPE_SEQUENCE,
.utype = V_ASN1_SEQUENCE,
.templates = NETSCAPE_ENCRYPTED_PKEY_seq_tt,
.tcount = sizeof(NETSCAPE_ENCRYPTED_PKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
.funcs = &NETSCAPE_ENCRYPTED_PKEY_aux,
.size = sizeof(NETSCAPE_ENCRYPTED_PKEY),
.sname = "NETSCAPE_ENCRYPTED_PKEY",
};
NETSCAPE_ENCRYPTED_PKEY *NETSCAPE_ENCRYPTED_PKEY_new(void);
void NETSCAPE_ENCRYPTED_PKEY_free(NETSCAPE_ENCRYPTED_PKEY *a);
NETSCAPE_ENCRYPTED_PKEY *d2i_NETSCAPE_ENCRYPTED_PKEY(NETSCAPE_ENCRYPTED_PKEY **a, const unsigned char **in, long len);
int i2d_NETSCAPE_ENCRYPTED_PKEY(const NETSCAPE_ENCRYPTED_PKEY *a, unsigned char **out);
NETSCAPE_ENCRYPTED_PKEY *
d2i_NETSCAPE_ENCRYPTED_PKEY(NETSCAPE_ENCRYPTED_PKEY **a, const unsigned char **in, long len)
{
return (NETSCAPE_ENCRYPTED_PKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&NETSCAPE_ENCRYPTED_PKEY_it);
}
int
i2d_NETSCAPE_ENCRYPTED_PKEY(const NETSCAPE_ENCRYPTED_PKEY *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &NETSCAPE_ENCRYPTED_PKEY_it);
}
NETSCAPE_ENCRYPTED_PKEY *
NETSCAPE_ENCRYPTED_PKEY_new(void)
{
return (NETSCAPE_ENCRYPTED_PKEY *)ASN1_item_new(&NETSCAPE_ENCRYPTED_PKEY_it);
}
void
NETSCAPE_ENCRYPTED_PKEY_free(NETSCAPE_ENCRYPTED_PKEY *a)
{
ASN1_item_free((ASN1_VALUE *)a, &NETSCAPE_ENCRYPTED_PKEY_it);
}
static const ASN1_TEMPLATE NETSCAPE_PKEY_seq_tt[] = {
{
.offset = offsetof(NETSCAPE_PKEY, version),
.field_name = "version",
.item = &LONG_it,
},
{
.offset = offsetof(NETSCAPE_PKEY, algor),
.field_name = "algor",
.item = &X509_ALGOR_it,
},
{
.offset = offsetof(NETSCAPE_PKEY, private_key),
.field_name = "private_key",
.item = &ASN1_OCTET_STRING_it,
},
};
const ASN1_ITEM NETSCAPE_PKEY_it = {
.itype = ASN1_ITYPE_SEQUENCE,
.utype = V_ASN1_SEQUENCE,
.templates = NETSCAPE_PKEY_seq_tt,
.tcount = sizeof(NETSCAPE_PKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
.size = sizeof(NETSCAPE_PKEY),
.sname = "NETSCAPE_PKEY",
};
NETSCAPE_PKEY *NETSCAPE_PKEY_new(void);
void NETSCAPE_PKEY_free(NETSCAPE_PKEY *a);
NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, const unsigned char **in, long len);
int i2d_NETSCAPE_PKEY(const NETSCAPE_PKEY *a, unsigned char **out);
NETSCAPE_PKEY *
d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, const unsigned char **in, long len)
{
return (NETSCAPE_PKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&NETSCAPE_PKEY_it);
}
int
i2d_NETSCAPE_PKEY(const NETSCAPE_PKEY *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &NETSCAPE_PKEY_it);
}
NETSCAPE_PKEY *
NETSCAPE_PKEY_new(void)
{
return (NETSCAPE_PKEY *)ASN1_item_new(&NETSCAPE_PKEY_it);
}
void
NETSCAPE_PKEY_free(NETSCAPE_PKEY *a)
{
ASN1_item_free((ASN1_VALUE *)a, &NETSCAPE_PKEY_it);
}
static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey);
int
i2d_Netscape_RSA(const RSA *a, unsigned char **pp,
int (*cb)(char *buf, int len, const char *prompt, int verify))
{
return i2d_RSA_NET(a, pp, cb, 0);
}
int
i2d_RSA_NET(const RSA *a, unsigned char **pp,
int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey)
{
int i, j, ret = 0;
int rsalen, pkeylen, olen;
NETSCAPE_PKEY *pkey = NULL;
NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
unsigned char buf[256], *zz;
unsigned char key[EVP_MAX_KEY_LENGTH];
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
if (a == NULL)
return (0);
if ((pkey = NETSCAPE_PKEY_new()) == NULL)
goto err;
if ((enckey = NETSCAPE_ENCRYPTED_PKEY_new()) == NULL)
goto err;
pkey->version = 0;
pkey->algor->algorithm = OBJ_nid2obj(NID_rsaEncryption);
if ((pkey->algor->parameter = ASN1_TYPE_new()) == NULL)
goto err;
pkey->algor->parameter->type = V_ASN1_NULL;
rsalen = i2d_RSAPrivateKey(a, NULL);
/* Fake some octet strings just for the initial length
* calculation.
*/
pkey->private_key->length = rsalen;
pkeylen = i2d_NETSCAPE_PKEY(pkey, NULL);
enckey->enckey->digest->length = pkeylen;
enckey->os->length = 11; /* "private-key" */
enckey->enckey->algor->algorithm = OBJ_nid2obj(NID_rc4);
if ((enckey->enckey->algor->parameter = ASN1_TYPE_new()) == NULL)
goto err;
enckey->enckey->algor->parameter->type = V_ASN1_NULL;
if (pp == NULL) {
olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL);
NETSCAPE_PKEY_free(pkey);
NETSCAPE_ENCRYPTED_PKEY_free(enckey);
return olen;
}
/* Since its RC4 encrypted length is actual length */
if ((zz = malloc(rsalen)) == NULL) {
ASN1error(ERR_R_MALLOC_FAILURE);
goto err;
}
pkey->private_key->data = zz;
/* Write out private key encoding */
i2d_RSAPrivateKey(a, &zz);
if ((zz = malloc(pkeylen)) == NULL) {
ASN1error(ERR_R_MALLOC_FAILURE);
goto err;
}
enckey->enckey->digest->data = zz;
if (!ASN1_STRING_set(enckey->os, "private-key", -1)) {
ASN1error(ERR_R_MALLOC_FAILURE);
goto err;
}
i2d_NETSCAPE_PKEY(pkey, &zz);
/* Wipe the private key encoding */
explicit_bzero(pkey->private_key->data, rsalen);
if (cb == NULL)
cb = EVP_read_pw_string;
i = cb((char *)buf, sizeof(buf), "Enter Private Key password:", 1);
if (i != 0) {
ASN1error(ASN1_R_BAD_PASSWORD_READ);
goto err;
}
i = strlen((char *)buf);
/* If the key is used for SGC the algorithm is modified a little. */
if (sgckey) {
if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL))
goto err;
memcpy(buf + 16, "SGCKEYSALT", 10);
i = 26;
}
if (!EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i,1, key, NULL))
goto err;
explicit_bzero(buf, sizeof(buf));
/* Encrypt private key in place */
zz = enckey->enckey->digest->data;
if (!EVP_EncryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL))
goto err;
if (!EVP_EncryptUpdate(&ctx, zz, &i, zz, pkeylen))
goto err;
if (!EVP_EncryptFinal_ex(&ctx, zz + i, &j))
goto err;
ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp);
err:
EVP_CIPHER_CTX_cleanup(&ctx);
NETSCAPE_ENCRYPTED_PKEY_free(enckey);
NETSCAPE_PKEY_free(pkey);
return (ret);
}
RSA *
d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length,
int (*cb)(char *buf, int len, const char *prompt, int verify))
{
return d2i_RSA_NET(a, pp, length, cb, 0);
}
RSA *
d2i_RSA_NET(RSA **a, const unsigned char **pp, long length,
int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey)
{
RSA *ret = NULL;
const unsigned char *p;
NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
p = *pp;
enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length);
if (!enckey) {
ASN1error(ASN1_R_DECODING_ERROR);
return NULL;
}
/* XXX 11 == strlen("private-key") */
if (enckey->os->length != 11 ||
memcmp("private-key", enckey->os->data, 11) != 0) {
ASN1error(ASN1_R_PRIVATE_KEY_HEADER_MISSING);
goto err;
}
if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) {
ASN1error(ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
goto err;
}
if (cb == NULL)
cb = EVP_read_pw_string;
if ((ret = d2i_RSA_NET_2(a, enckey->enckey->digest, cb,
sgckey)) == NULL)
goto err;
*pp = p;
err:
NETSCAPE_ENCRYPTED_PKEY_free(enckey);
return ret;
}
static RSA *
d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
int (*cb)(char *buf, int len, const char *prompt, int verify), int sgckey)
{
NETSCAPE_PKEY *pkey = NULL;
RSA *ret = NULL;
int i, j;
unsigned char buf[256];
const unsigned char *zz;
unsigned char key[EVP_MAX_KEY_LENGTH];
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx);
i=cb((char *)buf, sizeof(buf), "Enter Private Key password:",0);
if (i != 0) {
ASN1error(ASN1_R_BAD_PASSWORD_READ);
goto err;
}
i = strlen((char *)buf);
if (sgckey){
if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL))
goto err;
memcpy(buf + 16, "SGCKEYSALT", 10);
i = 26;
}
if (!EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i,1, key, NULL))
goto err;
explicit_bzero(buf, sizeof(buf));
if (!EVP_DecryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL))
goto err;
if (!EVP_DecryptUpdate(&ctx, os->data, &i, os->data, os->length))
goto err;
if (!EVP_DecryptFinal_ex(&ctx, &(os->data[i]), &j))
goto err;
os->length = i + j;
zz = os->data;
if ((pkey = d2i_NETSCAPE_PKEY(NULL, &zz, os->length)) == NULL) {
ASN1error(ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
goto err;
}
zz = pkey->private_key->data;
if ((ret = d2i_RSAPrivateKey(a, &zz,
pkey->private_key->length)) == NULL) {
ASN1error(ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
goto err;
}
err:
EVP_CIPHER_CTX_cleanup(&ctx);
NETSCAPE_PKEY_free(pkey);
return (ret);
}
#endif /* OPENSSL_NO_RC4 */
#endif