/* crypto/asn1/n_pkey.c */
/* 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 "cryptlib.h"
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#include <openssl/objects.h>
#include <openssl/asn1t.h>
#include <openssl/asn1_mac.h>
#include <openssl/evp.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;
ASN1_BROKEN_SEQUENCE(NETSCAPE_ENCRYPTED_PKEY) = {
ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, os, ASN1_OCTET_STRING),
ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, enckey, X509_SIG)
} ASN1_BROKEN_SEQUENCE_END(NETSCAPE_ENCRYPTED_PKEY)
DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)
DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY)
IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)
ASN1_SEQUENCE(NETSCAPE_PKEY) = {
ASN1_SIMPLE(NETSCAPE_PKEY, version, LONG),
ASN1_SIMPLE(NETSCAPE_PKEY, algor, X509_ALGOR),
ASN1_SIMPLE(NETSCAPE_PKEY, private_key, ASN1_OCTET_STRING)
} ASN1_SEQUENCE_END(NETSCAPE_PKEY)
DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)
DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY)
IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)
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;
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=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL)
{
ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
goto err;
}
pkey->private_key->data = zz;
/* Write out private key encoding */
i2d_RSAPrivateKey(a,&zz);
if ((zz=OPENSSL_malloc(pkeylen)) == NULL)
{
ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
goto err;
}
if (!ASN1_STRING_set(enckey->os, "private-key", -1))
{
ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
goto err;
}
enckey->enckey->digest->data = zz;
i2d_NETSCAPE_PKEY(pkey,&zz);
/* Wipe the private key encoding */
OPENSSL_cleanse(pkey->private_key->data, rsalen);
if (cb == NULL)
cb=EVP_read_pw_string;
i=cb((char *)buf,256,"Enter Private Key password:",1);
if (i != 0)
{
ASN1err(ASN1_F_I2D_RSA_NET,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) {
EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);
memcpy(buf + 16, "SGCKEYSALT", 10);
i = 26;
}
EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
OPENSSL_cleanse(buf,256);
/* Encrypt private key in place */
zz = enckey->enckey->digest->data;
EVP_CIPHER_CTX_init(&ctx);
EVP_EncryptInit_ex(&ctx,EVP_rc4(),NULL,key,NULL);
EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen);
EVP_EncryptFinal_ex(&ctx,zz + i,&j);
EVP_CIPHER_CTX_cleanup(&ctx);
ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp);
err:
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) {
ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_DECODING_ERROR);
return NULL;
}
if ((enckey->os->length != 11) || (strncmp("private-key",
(char *)enckey->os->data,11) != 0))
{
ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
NETSCAPE_ENCRYPTED_PKEY_free(enckey);
return NULL;
}
if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4)
{
ASN1err(ASN1_F_D2I_RSA_NET,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;
i=cb((char *)buf,256,"Enter Private Key password:",0);
if (i != 0)
{
ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_BAD_PASSWORD_READ);
goto err;
}
i = strlen((char *)buf);
if(sgckey){
EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);
memcpy(buf + 16, "SGCKEYSALT", 10);
i = 26;
}
EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
OPENSSL_cleanse(buf,256);
EVP_CIPHER_CTX_init(&ctx);
EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL);
EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j);
EVP_CIPHER_CTX_cleanup(&ctx);
os->length=i+j;
zz=os->data;
if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
{
ASN1err(ASN1_F_D2I_RSA_NET_2,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)
{
ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
goto err;
}
err:
NETSCAPE_PKEY_free(pkey);
return(ret);
}
#endif /* OPENSSL_NO_RC4 */
#else /* !OPENSSL_NO_RSA */
# if PEDANTIC
static void *dummy=&dummy;
# endif
#endif