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os400qc3.c
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/*
* Copyright (C) 2015-2016 Patrick Monnerat, D+H <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* 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.
*
* Neither the name of the copyright holder nor the names
* of any other contributors may be used to endorse or
* promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "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 COPYRIGHT OWNER 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.
*/
#include "libssh2_priv.h"
#ifdef LIBSSH2_OS400QC3 /* compile only if we build with OS/400 QC3 library */
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <alloca.h>
#include <sys/uio.h>
#include <arpa/inet.h>
#ifdef OS400_DEBUG
/* In debug mode, all system library errors cause an exception. */
#define set_EC_length(ec, length) ((ec).Bytes_Provided = \
(ec).Bytes_Available = 0)
#else
#define set_EC_length(ec, length) ((ec).Bytes_Provided = (length))
#endif
/* Ensure va_list operations are not on an array. */
typedef struct {
va_list list;
} valiststr;
typedef int (*loadkeyproc)(LIBSSH2_SESSION *session,
const unsigned char *data, unsigned int datalen,
const unsigned char *passphrase, void *loadkeydata);
/* Public key extraction data. */
typedef struct {
const char * method;
const unsigned char * data;
unsigned int length;
} loadpubkeydata;
/* Support for ASN.1 elements. */
typedef struct {
char * header; /* Pointer to header byte. */
char * beg; /* Pointer to element data. */
char * end; /* Pointer to 1st byte after element. */
unsigned char class; /* ASN.1 element class. */
unsigned char tag; /* ASN.1 element tag. */
unsigned char constructed; /* Element is constructed. */
} asn1Element;
#define ASN1_INTEGER 2
#define ASN1_BIT_STRING 3
#define ASN1_OCTET_STRING 4
#define ASN1_NULL 5
#define ASN1_OBJ_ID 6
#define ASN1_SEQ 16
#define ASN1_CONSTRUCTED 0x20
/* rsaEncryption OID: 1.2.840.113549.1.1.1 */
static unsigned char OID_rsaEncryption[] =
{9, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 1, 1, 1};
static int sshrsapubkey(LIBSSH2_SESSION *session, char **sshpubkey,
asn1Element *params, asn1Element *key,
const char *method);
#if LIBSSH2_DSA != 0
/* dsaEncryption OID: 1.2.840.10040.4.1 */
static unsigned char OID_dsaEncryption[] =
{7, 40 + 2, 0x86, 0x48, 0xCE, 0x38, 4, 1};
static int sshdsapubkey(LIBSSH2_SESSION *session, char **sshpubkey,
asn1Element *params, asn1Element *key,
const char *method);
#endif
static unsigned char OID_dhKeyAgreement[] =
{9, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 1, 3, 1};
/* PKCS#5 support. */
typedef struct pkcs5params pkcs5params;
struct pkcs5params {
int cipher; /* Encryption cipher. */
int blocksize; /* Cipher block size. */
char mode; /* Block encryption mode. */
char padopt; /* Pad option. */
char padchar; /* Pad character. */
int (*kdf)(LIBSSH2_SESSION *session, char **dk,
const unsigned char * passphrase, pkcs5params *pkcs5);
int hash; /* KDF hash algorithm. */
size_t hashlen; /* KDF hash digest length. */
char * salt; /* Salt. */
size_t saltlen; /* Salt length. */
char * iv; /* Initialization vector. */
size_t ivlen; /* Initialization vector length. */
int itercount; /* KDF iteration count. */
int dklen; /* Derived key length (#bytes). */
int effkeysize; /* RC2 effective key size (#bits) or 0. */
};
typedef struct pkcs5algo pkcs5algo;
struct pkcs5algo {
const unsigned char * oid;
int (*parse)(LIBSSH2_SESSION *session, pkcs5params *pkcs5,
pkcs5algo *algo, asn1Element *param);
int cipher; /* Encryption cipher. */
size_t blocksize; /* Cipher block size. */
char mode; /* Block encryption mode. */
char padopt; /* Pad option. */
char padchar; /* Pad character. */
size_t keylen; /* Key length (#bytes). */
int hash; /* Hash algorithm. */
size_t hashlen; /* Hash digest length. */
size_t saltlen; /* Salt length. */
size_t ivlen; /* Initialisation vector length. */
int effkeysize; /* RC2 effective key size (#bits) or 0. */
};
/* id-PBES2 OID: 1.2.840.113549.1.5.13 */
static const unsigned char OID_id_PBES2[] = {
9, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x05, 0x0D
};
static int parse_pbes2(LIBSSH2_SESSION *session, pkcs5params *pkcs5,
pkcs5algo *algo, asn1Element *param);
static const pkcs5algo PBES2 = {
OID_id_PBES2, parse_pbes2, 0, 0, '\0', '\0', '\0', 0,
0, 0, 0, 0, 0
};
/* id-PBKDF2 OID: 1.2.840.113549.1.5.12 */
static const unsigned char OID_id_PBKDF2[] = {
9, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x05, 0x0C
};
static int parse_pbkdf2(LIBSSH2_SESSION *session, pkcs5params *pkcs5,
pkcs5algo *algo, asn1Element *param);
static const pkcs5algo PBKDF2 = {
OID_id_PBKDF2, parse_pbkdf2, 0, 0, '\0', '\0', '\0',
SHA_DIGEST_LENGTH, Qc3_SHA1, SHA_DIGEST_LENGTH, 8, 8, 0
};
/* id-hmacWithSHA1 OID: 1.2.840.113549.2.7 */
static const unsigned char OID_id_hmacWithSHA1[] = {
8, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x02, 0x07
};
static int parse_hmacWithSHA1(LIBSSH2_SESSION *session, pkcs5params *pkcs5,
pkcs5algo *algo, asn1Element *param);
static const pkcs5algo hmacWithSHA1 = {
OID_id_hmacWithSHA1, parse_hmacWithSHA1, 0, 0, '\0', '\0', '\0',
SHA_DIGEST_LENGTH, Qc3_SHA1, SHA_DIGEST_LENGTH, 8, 8, 0
};
/* desCBC OID: 1.3.14.3.2.7 */
static const unsigned char OID_desCBC[] = {5, 40 + 3, 0x0E, 0x03, 0x02, 0x07};
static int parse_iv(LIBSSH2_SESSION *session, pkcs5params *pkcs5,
pkcs5algo *algo, asn1Element *param);
static const pkcs5algo desCBC = {
OID_desCBC, parse_iv, Qc3_DES, 8, Qc3_CBC, Qc3_Pad_Counter,
'\0', 8, 0, 0, 8, 8, 0
};
/* des-EDE3-CBC OID: 1.2.840.113549.3.7 */
static const unsigned char OID_des_EDE3_CBC[] = {
8, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x03, 0x07
};
static const pkcs5algo des_EDE3_CBC = {
OID_des_EDE3_CBC, parse_iv, Qc3_TDES, 8, Qc3_CBC, Qc3_Pad_Counter,
'\0', 24, 0, 0, 8, 8, 0
};
/* rc2CBC OID: 1.2.840.113549.3.2 */
static const unsigned char OID_rc2CBC[] = {
8, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x03, 0x02
};
static int parse_rc2(LIBSSH2_SESSION *session, pkcs5params *pkcs5,
pkcs5algo *algo, asn1Element *param);
static const pkcs5algo rc2CBC = {
OID_rc2CBC, parse_rc2, Qc3_RC2, 8, Qc3_CBC, Qc3_Pad_Counter,
'\0', 0, 0, 0, 8, 0, 32
};
/* pbeWithMD5AndDES-CBC OID: 1.2.840.113549.1.5.3 */
static const unsigned char OID_pbeWithMD5AndDES_CBC[] = {
9, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x05, 0x03
};
static int parse_pbes1(LIBSSH2_SESSION *session, pkcs5params *pkcs5,
pkcs5algo *algo, asn1Element *param);
static const pkcs5algo pbeWithMD5AndDES_CBC = {
OID_pbeWithMD5AndDES_CBC, parse_pbes1, Qc3_DES, 8, Qc3_CBC,
Qc3_Pad_Counter, '\0', 8, Qc3_MD5, MD5_DIGEST_LENGTH, 8, 0, 0
};
/* pbeWithMD5AndRC2-CBC OID: 1.2.840.113549.1.5.6 */
static const unsigned char OID_pbeWithMD5AndRC2_CBC[] = {
9, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x05, 0x06
};
static const pkcs5algo pbeWithMD5AndRC2_CBC = {
OID_pbeWithMD5AndRC2_CBC, parse_pbes1, Qc3_RC2, 8, Qc3_CBC,
Qc3_Pad_Counter, '\0', 0, Qc3_MD5, MD5_DIGEST_LENGTH, 8, 0, 64
};
/* pbeWithSHA1AndDES-CBC OID: 1.2.840.113549.1.5.10 */
static const unsigned char OID_pbeWithSHA1AndDES_CBC[] = {
9, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x05, 0x0A
};
static const pkcs5algo pbeWithSHA1AndDES_CBC = {
OID_pbeWithSHA1AndDES_CBC, parse_pbes1, Qc3_DES, 8, Qc3_CBC,
Qc3_Pad_Counter, '\0', 8, Qc3_SHA1, SHA_DIGEST_LENGTH, 8, 0, 0
};
/* pbeWithSHA1AndRC2-CBC OID: 1.2.840.113549.1.5.11 */
static const unsigned char OID_pbeWithSHA1AndRC2_CBC[] = {
9, 40 + 2, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x05, 0x0B
};
static const pkcs5algo pbeWithSHA1AndRC2_CBC = {
OID_pbeWithSHA1AndRC2_CBC, parse_pbes1, Qc3_RC2, 8, Qc3_CBC,
Qc3_Pad_Counter, '\0', 0, Qc3_SHA1, SHA_DIGEST_LENGTH, 8, 0, 64
};
/* rc5-CBC-PAD OID: 1.2.840.113549.3.9: RC5 not implemented in Qc3. */
/* pbeWithMD2AndDES-CBC OID: 1.2.840.113549.1.5.1: MD2 not implemented. */
/* pbeWithMD2AndRC2-CBC OID: 1.2.840.113549.1.5.4: MD2 not implemented. */
static const pkcs5algo * pbestable[] = {
&pbeWithMD5AndDES_CBC,
&pbeWithMD5AndRC2_CBC,
&pbeWithSHA1AndDES_CBC,
&pbeWithSHA1AndRC2_CBC,
&PBES2,
NULL
};
static const pkcs5algo * pbkdf2table[] = {
&PBKDF2,
NULL
};
static const pkcs5algo * pbes2enctable[] = {
&desCBC,
&des_EDE3_CBC,
&rc2CBC,
NULL
};
static const pkcs5algo * kdf2prftable[] = {
&hmacWithSHA1,
NULL
};
/* Public key extraction support. */
static struct {
unsigned char * oid;
int (*sshpubkey)(LIBSSH2_SESSION *session, char **pubkey,
asn1Element *params, asn1Element *key,
const char *method);
const char * method;
} pka[] = {
#if LIBSSH2_RSA != 0
{ OID_rsaEncryption, sshrsapubkey, "ssh-rsa" },
#endif
#if LIBSSH2_DSA != 0
{ OID_dsaEncryption, sshdsapubkey, "ssh-dss" },
#endif
{ NULL, NULL, NULL }
};
/* Define ASCII strings. */
static const char beginencprivkeyhdr[] =
"-----BEGIN ENCRYPTED PRIVATE KEY-----";
static const char endencprivkeyhdr[] = "-----END ENCRYPTED PRIVATE KEY-----";
static const char beginprivkeyhdr[] = "-----BEGIN PRIVATE KEY-----";
static const char endprivkeyhdr[] = "-----END PRIVATE KEY-----";
static const char beginrsaprivkeyhdr[] = "-----BEGIN RSA PRIVATE KEY-----";
static const char endrsaprivkeyhdr[] = "-----END RSA PRIVATE KEY-----";
static const char fopenrmode[] = "r";
static const char fopenrbmode[] = "rb";
/* The rest of character literals in this module are in EBCDIC. */
#pragma convert(37)
#include <qusec.h>
#include <qc3prng.h>
#include <qc3dtaen.h>
#include <qc3dtade.h>
#include <qc3ctx.h>
#include <qc3hash.h>
#include <qc3hmac.h>
#include <qc3pbext.h>
#include <qc3sigvr.h>
#include <qc3sigcl.h>
#include <qc3pbext.h>
#include <qc3dh.h>
static Qc3_Format_KEYD0100_T nulltoken = {""};
static int zero = 0;
static int rsaprivate[] = { Qc3_RSA_Private };
static char anycsp[] = { Qc3_Any_CSP };
static char binstring[] = { Qc3_Bin_String };
static char berstring[] = { Qc3_BER_String };
static char qc3clear[] = { Qc3_Clear };
static const Qus_EC_t ecnull = {0}; /* Error causes an exception. */
static asn1Element lastbytebitcount = {
(char *) &zero, NULL, (char *) &zero + 1
};
/*******************************************************************
*
* OS/400 QC3 crypto-library backend: ASN.1 support.
*
*******************************************************************/
static char *
getASN1Element(asn1Element *elem, char *beg, char *end)
{
unsigned char b;
unsigned long len;
asn1Element lelem;
/* Get a single ASN.1 element into `elem', parse ASN.1 string at `beg'
* ending at `end'.
* Returns a pointer in source string after the parsed element, or NULL
* if an error occurs.
*/
if (beg >= end || !*beg)
return NULL;
/* Process header byte. */
elem->header = beg;
b = (unsigned char) *beg++;
elem->constructed = (b & 0x20) != 0;
elem->class = (b >> 6) & 3;
b &= 0x1F;
if (b == 0x1F)
return NULL; /* Long tag values not supported here. */
elem->tag = b;
/* Process length. */
if (beg >= end)
return NULL;
b = (unsigned char) *beg++;
if (!(b & 0x80))
len = b;
else if (!(b &= 0x7F)) {
/* Unspecified length. Since we have all the data, we can determine the
* effective length by skipping element until an end element is
* found.
*/
if (!elem->constructed)
return NULL;
elem->beg = beg;
while (beg < end && *beg) {
beg = getASN1Element(&lelem, beg, end);
if (!beg)
return NULL;
}
if (beg >= end)
return NULL;
elem->end = beg;
return beg + 1;
} else if (beg + b > end)
return NULL; /* Does not fit in source. */
else {
/* Get long length. */
len = 0;
do {
if (len & 0xFF000000L)
return NULL; /* Lengths > 32 bits are not supported. */
len = (len << 8) | (unsigned char) *beg++;
} while (--b);
}
if ((unsigned long) (end - beg) < len)
return NULL; /* Element data does not fit in source. */
elem->beg = beg;
elem->end = beg + len;
return elem->end;
}
static asn1Element *
asn1_new(unsigned int type, unsigned int length)
{
asn1Element *e;
unsigned int hdrl = 2;
unsigned int i;
unsigned char *buf;
e = (asn1Element *) malloc(sizeof *e);
if (e) {
if (length >= 0x80)
for (i = length; i; i >>= 8)
hdrl++;
buf = (unsigned char *) malloc(hdrl + length);
if (buf) {
e->header = buf;
e->beg = buf + hdrl;
e->end = e->beg + length;
e->class = (type >> 6) & 0x03;
e->tag = type & 0x1F;
e->constructed = (type >> 5) & 0x01;
e->header[0] = type;
if (length < 0x80)
e->header[1] = length;
else {
e->header[1] = (hdrl - 2) | 0x80;
do {
e->header[--hdrl] = length;
length >>= 8;
} while (length);
}
} else {
free((char *) e);
e = NULL;
}
}
return e;
}
static asn1Element *
asn1_new_from_bytes(const unsigned char *data, unsigned int length)
{
asn1Element *e;
asn1Element te;
getASN1Element(&te,
(unsigned char *) data, (unsigned char *) data + length);
e = asn1_new(te.tag, te.end - te.beg);
if (e)
memcpy(e->header, data, e->end - e->header);
return e;
}
static void
asn1delete(asn1Element *e)
{
if (e) {
if (e->header)
free((char *) e->header);
free((char *) e);
}
}
static asn1Element *
asn1uint(_libssh2_bn *bn)
{
asn1Element *e;
int bits;
int length;
unsigned char * p;
if (!bn)
return NULL;
bits = _libssh2_bn_bits(bn);
length = (bits + 8) >> 3;
e = asn1_new(ASN1_INTEGER, length);
if (e) {
p = e->beg;
if (!(bits & 0x07))
*p++ = 0;
_libssh2_bn_to_bin(bn, p);
}
return e;
}
static asn1Element *
asn1containerv(unsigned int type, valiststr args)
{
valiststr va;
asn1Element *e;
asn1Element *p;
unsigned char *bp;
unsigned int length = 0;
memcpy((char *) &va, (char *) &args, sizeof args);
while ((p = va_arg(va.list, asn1Element *)))
length += p->end - p->header;
va_end(va.list);
e = asn1_new(type, length);
if (e) {
bp = e->beg;
while ((p = va_arg(args.list, asn1Element *))) {
memcpy(bp, p->header, p->end - p->header);
bp += p->end - p->header;
}
}
return e;
}
/* VARARGS1 */
static asn1Element *
asn1container(unsigned int type, ...)
{
valiststr va;
asn1Element *e;
va_start(va.list, type);
e = asn1containerv(type, va);
va_end(va.list);
return e;
}
static asn1Element *
asn1bytes(unsigned int type, const unsigned char *bytes, unsigned int length)
{
asn1Element *e;
e = asn1_new(type, length);
if (e && length)
memcpy(e->beg, bytes, length);
return e;
}
static asn1Element *
rsapublickey(_libssh2_bn *e, _libssh2_bn *m)
{
asn1Element *publicexponent;
asn1Element *modulus;
asn1Element *rsapubkey;
/* Build a PKCS#1 RSAPublicKey. */
modulus = asn1uint(m);
publicexponent = asn1uint(e);
rsapubkey = asn1container(ASN1_SEQ | ASN1_CONSTRUCTED,
modulus, publicexponent, NULL);
asn1delete(modulus);
asn1delete(publicexponent);
if (!modulus || !publicexponent) {
asn1delete(rsapubkey);
rsapubkey = NULL;
}
return rsapubkey;
}
static asn1Element *
rsaprivatekey(_libssh2_bn *e, _libssh2_bn *m, _libssh2_bn *d,
_libssh2_bn *p, _libssh2_bn *q,
_libssh2_bn *exp1, _libssh2_bn *exp2, _libssh2_bn *coeff)
{
asn1Element *version;
asn1Element *modulus;
asn1Element *publicexponent;
asn1Element *privateexponent;
asn1Element *prime1;
asn1Element *prime2;
asn1Element *exponent1;
asn1Element *exponent2;
asn1Element *coefficient;
asn1Element *rsaprivkey;
/* Build a PKCS#1 RSAPrivateKey. */
version = asn1bytes(ASN1_INTEGER, "\0", 1);
modulus = asn1uint(m);
publicexponent = asn1uint(e);
privateexponent = asn1uint(d);
prime1 = asn1uint(p);
prime2 = asn1uint(q);
exponent1 = asn1uint(exp1);
exponent2 = asn1uint(exp2);
coefficient = asn1uint(coeff);
rsaprivkey = asn1container(ASN1_SEQ | ASN1_CONSTRUCTED, version, modulus,
publicexponent, privateexponent, prime1, prime2,
exponent1, exponent2, coefficient, NULL);
asn1delete(version);
asn1delete(modulus);
asn1delete(publicexponent);
asn1delete(privateexponent);
asn1delete(prime1);
asn1delete(prime2);
asn1delete(exponent1);
asn1delete(exponent2);
asn1delete(coefficient);
if (!version || !modulus || !publicexponent || !privateexponent ||
!prime1 || !prime2 || !exponent1 || !exponent2 || !coefficient) {
asn1delete(rsaprivkey);
rsaprivkey = NULL;
}
return rsaprivkey;
}
static asn1Element *
subjectpublickeyinfo(asn1Element *pubkey, const unsigned char *algo,
asn1Element *parameters)
{
asn1Element *subjpubkey;
asn1Element *algorithm;
asn1Element *algorithmid;
asn1Element *subjpubkeyinfo;
unsigned int algosize = *algo++;
algorithm = asn1bytes(ASN1_OBJ_ID, algo, algosize);
algorithmid = asn1container(ASN1_SEQ | ASN1_CONSTRUCTED,
algorithm, parameters, NULL);
subjpubkey = asn1container(ASN1_BIT_STRING, &lastbytebitcount,
pubkey, NULL);
subjpubkeyinfo = asn1container(ASN1_SEQ | ASN1_CONSTRUCTED,
algorithmid, subjpubkey, NULL);
asn1delete(algorithm);
asn1delete(algorithmid);
asn1delete(subjpubkey);
if (!algorithm || !algorithmid || !subjpubkey) {
asn1delete(subjpubkeyinfo);
subjpubkeyinfo = NULL;
}
return subjpubkeyinfo;
}
static asn1Element *
rsasubjectpublickeyinfo(asn1Element *pubkey)
{
asn1Element *parameters;
asn1Element *subjpubkeyinfo;
parameters = asn1bytes(ASN1_NULL, NULL, 0);
subjpubkeyinfo = subjectpublickeyinfo(pubkey,
OID_rsaEncryption, parameters);
asn1delete(parameters);
if (!parameters) {
asn1delete(subjpubkeyinfo);
subjpubkeyinfo = NULL;
}
return subjpubkeyinfo;
}
static asn1Element *
privatekeyinfo(asn1Element *privkey, const unsigned char *algo,
asn1Element *parameters)
{
asn1Element *version;
asn1Element *privatekey;
asn1Element *algorithm;
asn1Element *privatekeyalgorithm;
asn1Element *privkeyinfo;
unsigned int algosize = *algo++;
/* Build a PKCS#8 PrivateKeyInfo. */
version = asn1bytes(ASN1_INTEGER, "\0", 1);
algorithm = asn1bytes(ASN1_OBJ_ID, algo, algosize);
privatekeyalgorithm = asn1container(ASN1_SEQ | ASN1_CONSTRUCTED,
algorithm, parameters, NULL);
privatekey = asn1container(ASN1_OCTET_STRING, privkey, NULL);
privkeyinfo = asn1container(ASN1_SEQ | ASN1_CONSTRUCTED, version,
privatekeyalgorithm, privatekey, NULL);
asn1delete(version);
asn1delete(algorithm);
asn1delete(privatekeyalgorithm);
if (!version || !algorithm || !privatekeyalgorithm) {
asn1delete(privkeyinfo);
privkeyinfo = NULL;
}
return privkeyinfo;
}
static asn1Element *
rsaprivatekeyinfo(asn1Element *privkey)
{
asn1Element *parameters;
asn1Element *privkeyinfo;
parameters = asn1bytes(ASN1_NULL, NULL, 0);
privkeyinfo = privatekeyinfo(privkey, OID_rsaEncryption, parameters);
asn1delete(parameters);
if (!parameters) {
asn1delete(privkeyinfo);
privkeyinfo = NULL;
}
return privkeyinfo;
}
/*******************************************************************
*
* OS/400 QC3 crypto-library backend: big numbers support.
*
*******************************************************************/
_libssh2_bn *
_libssh2_bn_init(void)
{
_libssh2_bn *bignum;
bignum = (_libssh2_bn *) malloc(sizeof *bignum);
if (bignum) {
bignum->bignum = NULL;
bignum->length = 0;
}
return bignum;
}
void
_libssh2_bn_free(_libssh2_bn *bn)
{
if (bn) {
if (bn->bignum) {
#ifdef LIBSSH2_CLEAR_MEMORY
if (bn->length)
memset((char *) bn->bignum, 0, bn->length);
#endif
free(bn->bignum);
}
free((char *) bn);
}
}
static int
_libssh2_bn_resize(_libssh2_bn *bn, size_t newlen)
{
unsigned char *bignum;
if (!bn)
return -1;
if (newlen == bn->length)
return 0;
if (!bn->bignum)
bignum = (unsigned char *) malloc(newlen);
else {
#ifdef LIBSSH2_CLEAR_MEMORY
if (newlen < bn->length)
memset((char *) bn->bignum + newlen, 0, bn->length - newlen);
#endif
if (!newlen) {
free((char *) bn->bignum);
bn->bignum = NULL;
bn->length = 0;
return 0;
}
bignum = (unsigned char *) realloc((char *) bn->bignum, newlen);
}
if (!bignum)
return -1;
if (newlen > bn->length)
memset((char *) bignum + bn->length, 0, newlen - bn->length);
bn->bignum = bignum;
bn->length = newlen;
return 0;
}
unsigned long
_libssh2_bn_bits(_libssh2_bn *bn)
{
unsigned int i;
unsigned char b;
if (bn && bn->bignum) {
for (i = bn->length; i--;)
if ((b = bn->bignum[i])) {
i *= 8;
do {
i++;
} while (b >>= 1);
return i;
}
}
return 0;
}
int
_libssh2_bn_from_bin(_libssh2_bn *bn, int len, const unsigned char *val)
{
int i;
if (!bn || (len && !val))
return -1;
for (; len && !*val; len--)
val++;
if (_libssh2_bn_resize(bn, len))
return -1;
for (i = len; i--;)
bn->bignum[i] = *val++;
return 0;
}
int
_libssh2_bn_set_word(_libssh2_bn *bn, unsigned long val)
{
val = htonl(val);
return _libssh2_bn_from_bin(bn, sizeof val, (unsigned char *) &val);
}
int
_libssh2_bn_to_bin(_libssh2_bn *bn, unsigned char *val)
{
int i;
if (!bn || !val)
return -1;
for (i = bn->length; i--;)
*val++ = bn->bignum[i];
return 0;
}
static int
_libssh2_bn_from_bn(_libssh2_bn *to, _libssh2_bn *from)
{
int i;
if (!to || !from)
return -1;
if (_libssh2_bn_resize(to, from->length))
return -1;
for (i = to->length; i--;)
to->bignum[i] = from->bignum[i];
return 0;
}
void
_libssh2_random(unsigned char *buf, int len)
{
Qc3GenPRNs(buf, len,
Qc3PRN_TYPE_NORMAL, Qc3PRN_NO_PARITY, (char *) &ecnull);
}
/*******************************************************************
*
* OS/400 QC3 crypto-library backend: crypto context support.
*
*******************************************************************/
static _libssh2_os400qc3_crypto_ctx *
libssh2_init_crypto_ctx(_libssh2_os400qc3_crypto_ctx *ctx)
{
if (!ctx)
ctx = (_libssh2_os400qc3_crypto_ctx *) malloc(sizeof *ctx);
if (ctx) {
memset((char *) ctx, 0, sizeof *ctx);
ctx->hash.Final_Op_Flag = Qc3_Continue;
}
return ctx;
}
static int
null_token(const char *token)
{
return !memcmp(token, nulltoken.Key_Context_Token,
sizeof nulltoken.Key_Context_Token);
}
void
_libssh2_os400qc3_crypto_dtor(_libssh2_os400qc3_crypto_ctx *x)
{
if (!x)
return;
if (!null_token(x->hash.Alg_Context_Token)) {
Qc3DestroyAlgorithmContext(x->hash.Alg_Context_Token, (char *) &ecnull);
memset(x->hash.Alg_Context_Token, 0, sizeof x->hash.Alg_Context_Token);
}
if (!null_token(x->key.Key_Context_Token)) {
Qc3DestroyKeyContext(x->key.Key_Context_Token, (char *) &ecnull);
memset(x->key.Key_Context_Token, 0, sizeof x->key.Key_Context_Token);
}
if (x->kek) {
_libssh2_os400qc3_crypto_dtor(x->kek);
free((char *) x->kek);
x->kek = NULL;
}
}
/*******************************************************************
*
* OS/400 QC3 crypto-library backend: hash algorithms support.
*
*******************************************************************/
int
libssh2_os400qc3_hash_init(Qc3_Format_ALGD0100_T *x, unsigned int algorithm)
{
Qc3_Format_ALGD0500_T algd;
Qus_EC_t errcode;
if (!x)
return 0;
memset((char *) x, 0, sizeof *x);
x->Final_Op_Flag = Qc3_Continue;
algd.Hash_Alg = algorithm;
set_EC_length(errcode, sizeof errcode);
Qc3CreateAlgorithmContext((char *) &algd, Qc3_Alg_Hash,
x->Alg_Context_Token, &errcode);
return errcode.Bytes_Available? 0: 1;
}
void
libssh2_os400qc3_hash_update(Qc3_Format_ALGD0100_T *ctx,
unsigned char *data, int len)
{
char dummy[64];
ctx->Final_Op_Flag = Qc3_Continue;
Qc3CalculateHash((char *) data, &len, Qc3_Data, (char *) ctx,
Qc3_Alg_Token, anycsp, NULL, dummy, (char *) &ecnull);
}
void
libssh2_os400qc3_hash_final(Qc3_Format_ALGD0100_T *ctx, unsigned char *out)
{
char data;
ctx->Final_Op_Flag = Qc3_Final;
Qc3CalculateHash(&data, &zero, Qc3_Data, (char *) ctx, Qc3_Alg_Token,
anycsp, NULL, (char *) out, (char *) &ecnull);
Qc3DestroyAlgorithmContext(ctx->Alg_Context_Token, (char *) &ecnull);
memset(ctx->Alg_Context_Token, 0, sizeof ctx->Alg_Context_Token);
}
int
libssh2_os400qc3_hash(const unsigned char *message, unsigned long len,
unsigned char *out, unsigned int algo)
{
Qc3_Format_ALGD0100_T ctx;
if (!libssh2_os400qc3_hash_init(&ctx, algo))
return 1;
libssh2_os400qc3_hash_update(&ctx, (unsigned char *) message, len);
libssh2_os400qc3_hash_final(&ctx, out);
return 0;
}
void
libssh2_os400qc3_hmac_init(_libssh2_os400qc3_crypto_ctx *ctx,