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RetroShare/libretroshare/src/pqi/authssl.cc
joss17 56694fbc84 change come locks and code cleaning 
git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@2279 b45a01b8-16f6-495d-af2f-9b41ad6348cc
2010-02-10 21:54:28 +00:00

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/*
* libretroshare/src/pqi: authssl.cc
*
* 3P/PQI network interface for RetroShare.
*
* Copyright 2004-2008 by Robert Fernie.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License Version 2 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Please report all bugs and problems to "retroshare@lunamutt.com".
*
*
* This class is designed to provide authentication using ssl certificates
* only. It is intended to be wrapped by an gpgauthmgr to provide
* pgp + ssl web-of-trust authentication.
*
*/
#include "authssl.h"
#include "cleanupxpgp.h"
#include "pqinetwork.h"
#include "authgpg.h"
#include "pqi/p3connmgr.h"
/******************** notify of new Cert **************************/
#include "pqinotify.h"
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <sstream>
#include <iomanip>
/********************************************************************************/
/********************************************************************************/
/********************************************************************************/
// initialisation du pointeur de singleton à zéro
AuthSSL *AuthSSL::instance_ssl = new AuthSSL();
// initialisation du pointeur de ex data du ssl context
int AuthSSL::ex_data_ctx_index = 0;
sslcert::sslcert(X509 *x509, std::string pid)
{
certificate = x509;
id = pid;
name = getX509CNString(x509->cert_info->subject);
org = getX509OrgString(x509->cert_info->subject);
location = getX509LocString(x509->cert_info->subject);
email = "";
issuer = getX509CNString(x509->cert_info->issuer);
authed = false;
}
sslcert::sslcert()
{
email = "";
authed = false;
}
X509_REQ *GenerateX509Req(
std::string pkey_file, std::string passwd,
std::string name, std::string email, std::string org,
std::string loc, std::string state, std::string country,
int nbits_in, std::string &errString)
{
/* generate request */
X509_REQ *req=X509_REQ_new();
// setup output.
BIO *bio_out = NULL;
bio_out = BIO_new(BIO_s_file());
BIO_set_fp(bio_out,stdout,BIO_NOCLOSE);
EVP_PKEY *pkey = NULL;
// first generate a key....
if ((pkey=EVP_PKEY_new()) == NULL)
{
fprintf(stderr,"GenerateX509Req: Couldn't Create Key\n");
return 0;
}
int nbits = 2048;
unsigned long e = 0x10001;
if ((nbits_in >= 512) && (nbits_in <= 4096))
{
nbits = nbits_in;
}
else
{
fprintf(stderr,"GenerateX509Req: strange num of nbits: %d\n", nbits_in);
fprintf(stderr,"GenerateX509Req: reverting to %d\n", nbits);
}
RSA *rsa = RSA_generate_key(nbits, e, NULL, NULL);
if ((rsa == NULL) || !EVP_PKEY_assign_RSA(pkey, rsa))
{
if(rsa) RSA_free(rsa);
fprintf(stderr,"GenerateX509Req: Couldn't Generate RSA Key!\n");
return 0;
}
// open the file.
FILE *out;
if (NULL == (out = fopen(pkey_file.c_str(), "w")))
{
fprintf(stderr,"GenerateX509Req: Couldn't Create Key File!");
fprintf(stderr," : %s\n", pkey_file.c_str());
return 0;
}
const EVP_CIPHER *cipher = EVP_des_ede3_cbc();
if (!PEM_write_PrivateKey(out,pkey,cipher,
NULL,0,NULL,(void *) passwd.c_str()))
{
fprintf(stderr,"GenerateX509Req() Couldn't Save Private Key");
fprintf(stderr," : %s\n", pkey_file.c_str());
return 0;
}
fclose(out);
// We have now created a private key....
fprintf(stderr,"GenerateX509Req() Saved Private Key");
fprintf(stderr," : %s\n", pkey_file.c_str());
/********** Test Loading the private Key.... ************/
FILE *tst_in = NULL;
EVP_PKEY *tst_pkey = NULL;
if (NULL == (tst_in = fopen(pkey_file.c_str(), "rb")))
{
fprintf(stderr,"GenerateX509Req() Couldn't Open Private Key");
fprintf(stderr," : %s\n", pkey_file.c_str());
return 0;
}
if (NULL == (tst_pkey =
PEM_read_PrivateKey(tst_in,NULL,NULL,(void *) passwd.c_str())))
{
fprintf(stderr,"GenerateX509Req() Couldn't Read Private Key");
fprintf(stderr," : %s\n", pkey_file.c_str());
return 0;
}
fclose(tst_in);
EVP_PKEY_free(tst_pkey);
/********** Test Loading the private Key.... ************/
/* Fill in details: fields.
req->req_info;
req->req_info->enc;
req->req_info->version;
req->req_info->subject;
req->req_info->pubkey;
****************************/
long version = 0x00;
unsigned long chtype = MBSTRING_ASC;
X509_NAME *x509_name = X509_NAME_new();
// fill in the request.
/**** X509_REQ -> Version ********************************/
if (!X509_REQ_set_version(req,version)) /* version 1 */
{
fprintf(stderr,"GenerateX509Req(): Couldn't Set Version!\n");
return 0;
}
/**** X509_REQ -> Version ********************************/
/**** X509_REQ -> Key ********************************/
if (!X509_REQ_set_pubkey(req,pkey))
{
fprintf(stderr,"GenerateX509Req() Couldn't Set PUBKEY !\n");
return 0;
}
/**** SUBJECT ********************************/
// create the name.
// fields to add.
// commonName CN
// emailAddress (none)
// organizationName O
// localityName L
// stateOrProvinceName ST
// countryName C
if (0 < strlen(name.c_str()))
{
X509_NAME_add_entry_by_txt(x509_name, "CN", chtype,
(unsigned char *) name.c_str(), -1, -1, 0);
}
else
{
fprintf(stderr,"GenerateX509Req(): No Name -> Not creating X509 Cert Req\n");
return 0;
}
if (0 < strlen(email.c_str()))
{
//X509_NAME_add_entry_by_txt(x509_name, "Email", 0,
// (unsigned char *) ui -> gen_email -> value(), -1, -1, 0);
X509_NAME_add_entry_by_NID(x509_name, 48, 0,
(unsigned char *) email.c_str(), -1, -1, 0);
}
if (0 < strlen(org.c_str()))
{
X509_NAME_add_entry_by_txt(x509_name, "O", chtype,
(unsigned char *) org.c_str(), -1, -1, 0);
}
if (0 < strlen(loc.c_str()))
{
X509_NAME_add_entry_by_txt(x509_name, "L", chtype,
(unsigned char *) loc.c_str(), -1, -1, 0);
}
if (0 < strlen(state.c_str()))
{
X509_NAME_add_entry_by_txt(x509_name, "ST", chtype,
(unsigned char *) state.c_str(), -1, -1, 0);
}
if (0 < strlen(country.c_str()))
{
X509_NAME_add_entry_by_txt(x509_name, "C", chtype,
(unsigned char *) country.c_str(), -1, -1, 0);
}
if (!X509_REQ_set_subject_name(req,x509_name))
{
fprintf(stderr,"GenerateX509Req() Couldn't Set Name to Request!\n");
X509_NAME_free(x509_name);
return 0;
}
X509_NAME_free(x509_name);
/**** SUBJECT ********************************/
if (!X509_REQ_sign(req,pkey,EVP_sha1()))
{
fprintf(stderr,"GenerateX509Req() Failed to Sign REQ\n");
return 0;
}
return req;
}
#define SERIAL_RAND_BITS 64
X509 *SignX509Certificate(X509_NAME *issuer, EVP_PKEY *privkey, X509_REQ *req, long days)
{
const EVP_MD *digest = EVP_sha1();
ASN1_INTEGER *serial = ASN1_INTEGER_new();
EVP_PKEY *tmppkey;
X509 *x509 = X509_new();
if (x509 == NULL)
return NULL;
BIGNUM *btmp = BN_new();
if (!BN_pseudo_rand(btmp, SERIAL_RAND_BITS, 0, 0))
{
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," pseudo_rand\n");
return NULL;
}
if (!BN_to_ASN1_INTEGER(btmp, serial))
{
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," int\n");
return NULL;
}
BN_free(btmp);
if (!X509_set_serialNumber(x509, serial))
{
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," serialNumber\n");
return NULL;
}
ASN1_INTEGER_free(serial);
if (!X509_set_issuer_name(x509, issuer))
{
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," issuer\n");
return NULL;
}
if (!X509_gmtime_adj(x509->cert_info->validity->notBefore, 0))
{
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," notBefore\n");
return NULL;
}
//x509->cert_info->validity->notAfter
//if (!X509_gmtime_adj(X509_get_notAfter(x509), (long)60*60*24*days))
if (!X509_gmtime_adj(x509->cert_info->validity->notAfter, (long)60*60*24*days))
{
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," notAfter\n");
return NULL;
}
if (!X509_set_subject_name(x509, X509_REQ_get_subject_name(req)))
{
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," subject_name\n");
return NULL;
}
tmppkey = X509_REQ_get_pubkey(req);
if (!tmppkey || !X509_set_pubkey(x509,tmppkey))
{
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," pubkey\n");
return NULL;
}
/* Cleanup Algorithm part */
X509_ALGOR *algor1 = x509->cert_info->signature;
X509_ALGOR *algor2 = x509->sig_alg;
X509_ALGOR *a;
a = algor1;
ASN1_TYPE_free(a->parameter);
a->parameter=ASN1_TYPE_new();
a->parameter->type=V_ASN1_NULL;
ASN1_OBJECT_free(a->algorithm);
a->algorithm=OBJ_nid2obj(digest->pkey_type);
a = algor2;
ASN1_TYPE_free(a->parameter);
a->parameter=ASN1_TYPE_new();
a->parameter->type=V_ASN1_NULL;
ASN1_OBJECT_free(a->algorithm);
a->algorithm=OBJ_nid2obj(digest->pkey_type);
if (!X509_sign(x509,privkey,digest))
{
long e = ERR_get_error();
fprintf(stderr,"SignX509Certificate() Failed: ");
fprintf(stderr," signing Error: %ld\n", e);
fprintf(stderr,"ERR: %s, %s, %s\n",
ERR_lib_error_string(e),
ERR_func_error_string(e),
ERR_reason_error_string(e));
int inl=i2d_X509(x509,NULL);
int outl=EVP_PKEY_size(privkey);
fprintf(stderr,"Size Check: inl: %d, outl: %d\n", inl, outl);
return NULL;
}
fprintf(stderr,"SignX509Certificate() Success\n");
return x509;
}
AuthSSL::AuthSSL()
:init(0), sslctx(NULL), pkey(NULL), mToSaveCerts(false), mConfigSaveActive(true)
{
}
bool AuthSSL::active()
{
return init;
}
// args: server cert, server private key, trusted certificates.
static int verify_x509_callback(int preverify_ok, X509_STORE_CTX *ctx)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "static verify_x509_callback called.";
std::cerr << std::endl;
#endif
return AuthSSL::getAuthSSL()->VerifyX509Callback(preverify_ok, ctx);
}
int AuthSSL::InitAuth(const char *cert_file, const char *priv_key_file,
const char *passwd)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::InitAuth()";
std::cerr << std::endl;
#endif
static int initLib = 0;
if (!initLib)
{
initLib = 1;
SSL_load_error_strings();
SSL_library_init();
}
if (init == 1)
{
std::cerr << "AuthSSL::InitAuth already initialized." << std::endl;
return 1;
}
if ((cert_file == NULL) ||
(priv_key_file == NULL) ||
(passwd == NULL))
{
//fprintf(stderr, "sslroot::initssl() missing parameters!\n");
return 0;
}
// actions_to_seed_PRNG();
RAND_seed(passwd, strlen(passwd));
std::cerr << "SSL Library Init!" << std::endl;
// setup connection method
sslctx = SSL_CTX_new(TLSv1_method());
// setup cipher lists.
SSL_CTX_set_cipher_list(sslctx, "DEFAULT");
// certificates (Set Local Server Certificate).
FILE *ownfp = fopen(cert_file, "r");
if (ownfp == NULL)
{
std::cerr << "Couldn't open Own Certificate!" << std::endl;
return -1;
}
// get xPGP certificate.
X509 *x509 = PEM_read_X509(ownfp, NULL, NULL, NULL);
fclose(ownfp);
if (x509 == NULL)
{
std::cerr << "AuthSSL::InitAuth() PEM_read_X509() Failed";
std::cerr << std::endl;
return -1;
}
SSL_CTX_use_certificate(sslctx, x509);
// get private key
FILE *pkfp = fopen(priv_key_file, "rb");
if (pkfp == NULL)
{
std::cerr << "Couldn't Open PrivKey File!" << std::endl;
CloseAuth();
return -1;
}
pkey = PEM_read_PrivateKey(pkfp, NULL, NULL, (void *) passwd);
fclose(pkfp);
if (pkey == NULL)
{
std::cerr << "AuthSSL::InitAuth() PEM_read_PrivateKey() Failed";
std::cerr << std::endl;
return -1;
}
SSL_CTX_use_PrivateKey(sslctx, pkey);
if (1 != SSL_CTX_check_private_key(sslctx))
{
std::cerr << "Issues With Private Key! - Doesn't match your Cert" << std::endl;
std::cerr << "Check your input key/certificate:" << std::endl;
std::cerr << priv_key_file << " & " << cert_file;
std::cerr << std::endl;
CloseAuth();
return -1;
}
if (!getX509id(x509, mOwnId))
{
std::cerr << "AuthSSL::InitAuth() getX509id() Failed";
std::cerr << std::endl;
/* bad certificate */
CloseAuth();
return -1;
}
/* Check that Certificate is Ok ( virtual function )
* for gpg/pgp or CA verification
*/
if (!validateOwnCertificate(x509, pkey))
{
std::cerr << "AuthSSL::InitAuth() validateOwnCertificate() Failed";
std::cerr << std::endl;
/* bad certificate */
CloseAuth();
return -1;
}
// enable verification of certificates (PEER)
// and install verify callback.
SSL_CTX_set_verify(sslctx, SSL_VERIFY_PEER |
SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
verify_x509_callback);
std::cerr << "SSL Verification Set" << std::endl;
mOwnCert = new sslcert(x509, mOwnId);
init = 1;
return 1;
}
/* Dummy function to be overloaded by real implementation */
bool AuthSSL::validateOwnCertificate(X509 *x509, EVP_PKEY *pkey)
{
return true;
//return false;
}
bool AuthSSL::CloseAuth()
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::CloseAuth()";
std::cerr << std::endl;
#endif
SSL_CTX_free(sslctx);
// clean up private key....
// remove certificates etc -> opposite of initssl.
init = 0;
return 1;
}
/* Context handling */
SSL_CTX *AuthSSL::getCTX()
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::getCTX()";
std::cerr << std::endl;
#endif
return sslctx;
}
/* Context handling */
SSL_CTX *AuthSSL::getNewSslCtx()
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::getNewSslCtx()" << std::endl;
#endif
// setup connection method
SSL_CTX *newSslctx = SSL_CTX_new(TLSv1_method());
// setup cipher lists.
SSL_CTX_set_cipher_list(newSslctx, "DEFAULT");
// certificates (Set Local Server Certificate).
SSL_CTX_use_certificate(newSslctx, mOwnCert->certificate);
// get private key
SSL_CTX_use_PrivateKey(newSslctx, pkey);
// enable verification of certificates (PEER)
// and install verify callback.
SSL_CTX_set_verify(newSslctx, SSL_VERIFY_PEER |
SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
verify_x509_callback);
std::cerr << "getNewSslCtx() finished" << std::endl;
return newSslctx;
}
int AuthSSL::setConfigDirectories(std::string configfile, std::string neighdir)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::setConfigDirectories() ";
std::cerr << " configfile: " << configfile;
std::cerr << " neighdir: " << neighdir;
std::cerr << std::endl;
#endif
RsStackMutex stack(sslMtx); /***** LOCK *****/
mCertConfigFile = configfile;
mNeighDir = neighdir;
return 1;
}
std::string AuthSSL::OwnId()
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::OwnId()";
std::cerr << std::endl;
#endif
return mOwnId;
}
std::string AuthSSL::getOwnLocation()
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::OwnId()";
std::cerr << std::endl;
#endif
return mOwnCert->location;
}
/* Load/Save certificates */
//don't save the ssl certs anymore, just return the id
bool AuthSSL::LoadDetailsFromStringCert(std::string pem, RsPeerDetails &pd)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::LoadIdsFromStringCert() " << std::endl;
#endif
X509 *x509 = loadX509FromPEM(pem);
if (!x509) {
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::LoadIdsFromStringCert() certificate not loadable (maybe malformed)" << std::endl;
#endif
return false;
}
if (!ValidateCertificate(x509, pd.id)) {
return false;
} else {
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::LoadIdsFromStringCert() certificate validated." << std::endl;
#endif
pd.gpg_id = getX509CNString(x509->cert_info->issuer);
pd.location = getX509LocString(x509->cert_info->subject);
return true;
}
}
std::string AuthSSL::SaveOwnCertificateToString()
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::SaveOwnCertificateToString() " << std::endl;
#endif
/* get the cert first */
std::string certstr;
BIO *bp = BIO_new(BIO_s_mem());
PEM_write_bio_X509(bp, mOwnCert->certificate);
/* translate the bp data to a string */
char *data;
int len = BIO_get_mem_data(bp, &data);
for(int i = 0; i < len; i++)
{
certstr += data[i];
}
BIO_free(bp);
return certstr;
}
/* Sign / Encrypt / Verify Data (TODO) */
bool AuthSSL::SignData(std::string input, std::string &sign)
{
return SignData(input.c_str(), input.length(), sign);
}
bool AuthSSL::SignData(const void *data, const uint32_t len, std::string &sign)
{
RsStackMutex stack(sslMtx); /***** STACK LOCK MUTEX *****/
EVP_MD_CTX *mdctx = EVP_MD_CTX_create();
unsigned int signlen = EVP_PKEY_size(pkey);
unsigned char signature[signlen];
if (0 == EVP_SignInit(mdctx, EVP_sha1()))
{
std::cerr << "EVP_SignInit Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
return false;
}
if (0 == EVP_SignUpdate(mdctx, data, len))
{
std::cerr << "EVP_SignUpdate Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
return false;
}
if (0 == EVP_SignFinal(mdctx, signature, &signlen, pkey))
{
std::cerr << "EVP_SignFinal Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
return false;
}
EVP_MD_CTX_destroy(mdctx);
sign.clear();
std::ostringstream out;
out << std::hex;
for(uint32_t i = 0; i < signlen; i++)
{
out << std::setw(2) << std::setfill('0');
out << (uint32_t) (signature[i]);
}
sign = out.str();
return true;
}
bool AuthSSL::SignDataBin(std::string input, unsigned char *sign, unsigned int *signlen)
{
return SignDataBin(input.c_str(), input.length(), sign, signlen);
}
bool AuthSSL::SignDataBin(const void *data, const uint32_t len,
unsigned char *sign, unsigned int *signlen)
{
RsStackMutex stack(sslMtx); /***** STACK LOCK MUTEX *****/
EVP_MD_CTX *mdctx = EVP_MD_CTX_create();
unsigned int req_signlen = EVP_PKEY_size(pkey);
if (req_signlen > *signlen)
{
/* not enough space */
std::cerr << "SignDataBin() Not Enough Sign SpacegnInit Failure!" << std::endl;
return false;
}
if (0 == EVP_SignInit(mdctx, EVP_sha1()))
{
std::cerr << "EVP_SignInit Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
return false;
}
if (0 == EVP_SignUpdate(mdctx, data, len))
{
std::cerr << "EVP_SignUpdate Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
return false;
}
if (0 == EVP_SignFinal(mdctx, sign, signlen, pkey))
{
std::cerr << "EVP_SignFinal Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
return false;
}
EVP_MD_CTX_destroy(mdctx);
return true;
}
//#define AUTHSSL_DEBUG2
bool AuthSSL::VerifyOtherSignBin(const void *data, const uint32_t len,
unsigned char *sign, unsigned int signlen, std::string sslCert) {
X509 *x509 = loadX509FromPEM(sslCert);
std::string sslId;
if (!ValidateCertificate(x509, sslId)) {
std::cerr << "AuthSSL::VerifyOtherSignBin() failed to validate certificate." << std::endl;
return false;
} else {
sslcert *cert = new sslcert(x509, sslId);
return VerifySignBin(data, len, sign, signlen, cert);
}
return false;
}
bool AuthSSL::VerifyOwnSignBin(const void *data, const uint32_t len,
unsigned char *sign, unsigned int signlen) {
return VerifySignBin(data, len, sign, signlen, mOwnCert);
}
bool AuthSSL::VerifySignBin(const void *data, const uint32_t len,
unsigned char *sign, unsigned int signlen, sslcert* peer)
{
RsStackMutex stack(sslMtx); /***** STACK LOCK MUTEX *****/
/* find the peer */
#ifdef AUTHSSL_DEBUG2
std::cerr << "In AuthSSL::VerifySignBin" << std::endl;
#endif
//std::cerr << "Cert info : " << getX509Info(X509 *cert) << std::endl;
/* cert->cert_info->key->pkey is NULL until we call SSL_CTX_use_certificate(),
* so we do it here then... */
SSL_CTX *newSslctx = SSL_CTX_new(TLSv1_method());
SSL_CTX_set_cipher_list(newSslctx, "DEFAULT");
SSL_CTX_use_certificate(newSslctx, peer->certificate);
EVP_PKEY *peerkey = peer->certificate->cert_info->key->pkey;
if(peerkey == NULL)
{
#ifdef AUTHSSL_DEBUG2
std::cerr << "AuthSSL::VerifySignBin: no public key available !!" << std::endl ;
#endif
return false ;
}
EVP_MD_CTX *mdctx = EVP_MD_CTX_create();
if (0 == EVP_VerifyInit(mdctx, EVP_sha1()))
{
std::cerr << "EVP_VerifyInit Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
X509_free(peer->certificate);
return false;
}
if (0 == EVP_VerifyUpdate(mdctx, data, len))
{
std::cerr << "EVP_VerifyUpdate Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
X509_free(peer->certificate);
return false;
}
if(signlen == 0 || sign == NULL)
{
#ifdef AUTHSSL_DEBUG2
std::cerr << "AuthSSL::VerifySignBin: signlen=" << signlen << ", sign=" << (void*)sign << "!!" << std::endl ;
#endif
EVP_MD_CTX_destroy(mdctx);
X509_free(peer->certificate);
return false ;
}
if (0 == EVP_VerifyFinal(mdctx, sign, signlen, peerkey))
{
std::cerr << "EVP_VerifyFinal Failure!" << std::endl;
EVP_MD_CTX_destroy(mdctx);
X509_free(peer->certificate);
return false;
}
EVP_MD_CTX_destroy(mdctx);
X509_free(peer->certificate);
return true;
}
X509 *AuthSSL::loadX509FromFile(std::string fname, std::string hash)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::LoadX509FromFile()";
std::cerr << std::endl;
#endif
// if there is a hash - check that the file matches it before loading.
X509 *pc = NULL;
FILE *pcertfp = fopen(fname.c_str(), "rb");
// load certificates from file.
if (pcertfp == NULL)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "sslroot::loadcertificate() Bad File: " << fname;
std::cerr << " Cannot be Hashed!" << std::endl;
#endif
return NULL;
}
/* We only check a signature's hash if
* we are loading from a configuration file.
* Therefore we saved the file and it should be identical.
* and a direct load + verify will work.
*
* If however it has been transported by email....
* Then we might have to correct the data (strip out crap)
* from the configuration at the end. (X509 load should work!)
*/
if (hash.length() > 1)
{
unsigned int signlen = EVP_PKEY_size(pkey);
unsigned char signature[signlen];
int maxsize = 20480; /* should be enough for about 50 signatures */
int rbytes;
char inall[maxsize];
if (0 == (rbytes = fread(inall, 1, maxsize, pcertfp)))
{
#ifdef AUTHSSL_DEBUG
std::cerr << "Error Reading Peer Record!" << std::endl;
#endif
return NULL;
}
//std::cerr << "Read " << rbytes << std::endl;
EVP_MD_CTX *mdctx = EVP_MD_CTX_create();
if (0 == EVP_SignInit_ex(mdctx, EVP_sha1(), NULL))
{
std::cerr << "EVP_SignInit Failure!" << std::endl;
}
if (0 == EVP_SignUpdate(mdctx, inall, rbytes))
{
std::cerr << "EVP_SignUpdate Failure!" << std::endl;
}
if (0 == EVP_SignFinal(mdctx, signature, &signlen, pkey))
{
std::cerr << "EVP_SignFinal Failure!" << std::endl;
}
EVP_MD_CTX_destroy(mdctx);
bool same = true;
if (signlen != hash.length())
{
#ifdef AUTHSSL_DEBUG
std::cerr << "Different Length Signatures... ";
std::cerr << "Cannot Load Certificate!" << std::endl;
#endif
fclose(pcertfp);
return NULL;
}
for(int i = 0; i < (signed) signlen; i++)
{
if (signature[i] != (unsigned char) hash[i])
{
same = false;
#ifdef AUTHSSL_DEBUG
std::cerr << "Invalid Signature... ";
std::cerr << "Cannot Load Certificate!" << std::endl;
#endif
fclose(pcertfp);
return NULL;
}
}
#ifdef AUTHSSL_DEBUG
std::cerr << "Verified Signature for: " << fname;
std::cerr << std::endl;
#endif
}
else
{
#ifdef AUTHSSL_DEBUG
std::cerr << "Not checking cert signature" << std::endl;
#endif
}
fseek(pcertfp, 0, SEEK_SET); /* rewind */
pc = PEM_read_X509(pcertfp, NULL, NULL, NULL);
fclose(pcertfp);
if (pc != NULL)
{
// read a certificate.
#ifdef AUTHSSL_DEBUG
std::cerr << "Loaded Certificate: " << pc -> name << std::endl;
#endif
}
else // (pc == NULL)
{
unsigned long err = ERR_get_error();
std::cerr << "Read Failed .... CODE(" << err << ")" << std::endl;
std::cerr << ERR_error_string(err, NULL) << std::endl;
return NULL;
}
return pc;
}
bool AuthSSL::saveX509ToFile(X509 *x509, std::string fname, std::string &hash)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::saveX509ToFile()";
std::cerr << std::endl;
#endif
// load certificates from file.
FILE *setfp = fopen(fname.c_str(), "wb");
if (setfp == NULL)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "sslroot::savecertificate() Bad File: " << fname;
std::cerr << " Cannot be Written!" << std::endl;
#endif
return false;
}
#ifdef AUTHSSL_DEBUG
std::cerr << "Writing out Cert...:" << x509->name << std::endl;
#endif
PEM_write_X509(setfp, x509);
fclose(setfp);
// then reopen to generate hash.
setfp = fopen(fname.c_str(), "rb");
if (setfp == NULL)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "sslroot::savecertificate() Bad File: " << fname;
std::cerr << " Opened for ReHash!" << std::endl;
#endif
return false;
}
unsigned int signlen = EVP_PKEY_size(pkey);
unsigned char signature[signlen];
int maxsize = 20480;
int rbytes;
char inall[maxsize];
if (0 == (rbytes = fread(inall, 1, maxsize, setfp)))
{
#ifdef AUTHSSL_DEBUG
std::cerr << "Error Writing Peer Record!" << std::endl;
#endif
return -1;
}
#ifdef AUTHSSL_DEBUG
std::cerr << "Read " << rbytes << std::endl;
#endif
EVP_MD_CTX *mdctx = EVP_MD_CTX_create();
if (0 == EVP_SignInit_ex(mdctx, EVP_sha1(), NULL))
{
std::cerr << "EVP_SignInit Failure!" << std::endl;
}
if (0 == EVP_SignUpdate(mdctx, inall, rbytes))
{
std::cerr << "EVP_SignUpdate Failure!" << std::endl;
}
if (0 == EVP_SignFinal(mdctx, signature, &signlen, pkey))
{
std::cerr << "EVP_SignFinal Failure!" << std::endl;
}
#ifdef AUTHSSL_DEBUG
std::cerr << "Saved Cert: " << x509->name;
std::cerr << std::endl;
#endif
#ifdef AUTHSSL_DEBUG
std::cerr << "Cert + Setting Signature is(" << signlen << "): ";
#endif
std::string signstr;
for(uint32_t i = 0; i < signlen; i++)
{
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "%02x", signature[i]);
#endif
signstr += signature[i];
}
#ifdef AUTHSSL_DEBUG
std::cerr << std::endl;
#endif
hash = signstr;
fclose(setfp);
EVP_MD_CTX_destroy(mdctx);
return true;
}
X509 *AuthSSL::loadX509FromPEM(std::string pem)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::LoadX509FromPEM()";
std::cerr << std::endl;
#endif
/* Put the data into a mem BIO */
char *certstr = strdup(pem.c_str());
BIO *bp = BIO_new_mem_buf(certstr, -1);
X509 *pc = PEM_read_bio_X509(bp, NULL, NULL, NULL);
BIO_free(bp);
free(certstr);
return pc;
}
X509 *AuthSSL::loadX509FromDER(const uint8_t *ptr, uint32_t len)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::LoadX509FromDER()";
std::cerr << std::endl;
#endif
X509 *tmp = NULL;
const unsigned char **certptr = (const unsigned char **) &ptr;
X509 *x509 = d2i_X509(&tmp, certptr, len);
return x509;
}
bool AuthSSL::saveX509ToDER(X509 *x509, uint8_t **ptr, uint32_t *len)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::saveX509ToDER()";
std::cerr << std::endl;
#endif
int certlen = i2d_X509(x509, (unsigned char **) ptr);
if (certlen > 0)
{
*len = certlen;
return true;
}
else
{
*len = 0;
return false;
}
return false;
}
bool getX509id(X509 *x509, std::string &xid) {
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::getX509id()";
std::cerr << std::endl;
#endif
xid = "";
if (x509 == NULL)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::getX509id() NULL pointer";
std::cerr << std::endl;
#endif
return false;
}
// get the signature from the cert, and copy to the array.
ASN1_BIT_STRING *signature = x509->signature;
int signlen = ASN1_STRING_length(signature);
if (signlen < CERTSIGNLEN)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::getX509id() ERROR: Short Signature";
std::cerr << std::endl;
#endif
return false;
}
// else copy in the first CERTSIGNLEN.
unsigned char *signdata = ASN1_STRING_data(signature);
std::ostringstream id;
/* switched to the other end of the signature. for
* more randomness
*/
for(int i = signlen - CERTSIGNLEN; i < signlen; i++)
{
id << std::hex << std::setw(2) << std::setfill('0')
<< (uint16_t) (((uint8_t *) (signdata))[i]);
}
xid = id.str();
return true;
}
X509 *AuthSSL::SignX509Req(X509_REQ *req, long days)
{
RsStackMutex stack(sslMtx); /******* LOCKED ******/
/* Transform the X509_REQ into a suitable format to
* generate DIGEST hash. (for SSL to do grunt work)
*/
#define SERIAL_RAND_BITS 64
const EVP_MD *digest = EVP_sha1();
ASN1_INTEGER *serial = ASN1_INTEGER_new();
EVP_PKEY *tmppkey;
X509 *x509 = X509_new();
if (x509 == NULL)
{
std::cerr << "AuthSSL::SignX509Req() FAIL" << std::endl;
return NULL;
}
long version = 0x00;
unsigned long chtype = MBSTRING_ASC;
X509_NAME *issuer_name = X509_NAME_new();
X509_NAME_add_entry_by_txt(issuer_name, "CN", chtype,
(unsigned char *) AuthGPG::getAuthGPG()->getGPGOwnId().c_str(), -1, -1, 0);
/****
X509_NAME_add_entry_by_NID(issuer_name, 48, 0,
(unsigned char *) "email@email.com", -1, -1, 0);
X509_NAME_add_entry_by_txt(issuer_name, "O", chtype,
(unsigned char *) "org", -1, -1, 0);
X509_NAME_add_entry_by_txt(x509_name, "L", chtype,
(unsigned char *) "loc", -1, -1, 0);
****/
std::cerr << "AuthSSL::SignX509Req() Issuer name: " << AuthGPG::getAuthGPG()->getGPGOwnId() << std::endl;
BIGNUM *btmp = BN_new();
if (!BN_pseudo_rand(btmp, SERIAL_RAND_BITS, 0, 0))
{
std::cerr << "AuthSSL::SignX509Req() rand FAIL" << std::endl;
return NULL;
}
if (!BN_to_ASN1_INTEGER(btmp, serial))
{
std::cerr << "AuthSSL::SignX509Req() asn1 FAIL" << std::endl;
return NULL;
}
BN_free(btmp);
if (!X509_set_serialNumber(x509, serial))
{
std::cerr << "AuthSSL::SignX509Req() serial FAIL" << std::endl;
return NULL;
}
ASN1_INTEGER_free(serial);
/* Generate SUITABLE issuer name.
* Must reference OpenPGP key, that is used to verify it
*/
if (!X509_set_issuer_name(x509, issuer_name))
{
std::cerr << "AuthSSL::SignX509Req() issue FAIL" << std::endl;
return NULL;
}
X509_NAME_free(issuer_name);
if (!X509_gmtime_adj(X509_get_notBefore(x509),0))
{
std::cerr << "AuthSSL::SignX509Req() notbefore FAIL" << std::endl;
return NULL;
}
if (!X509_gmtime_adj(X509_get_notAfter(x509), (long)60*60*24*days))
{
std::cerr << "AuthSSL::SignX509Req() notafter FAIL" << std::endl;
return NULL;
}
if (!X509_set_subject_name(x509, X509_REQ_get_subject_name(req)))
{
std::cerr << "AuthSSL::SignX509Req() sub FAIL" << std::endl;
return NULL;
}
tmppkey = X509_REQ_get_pubkey(req);
if (!tmppkey || !X509_set_pubkey(x509,tmppkey))
{
std::cerr << "AuthSSL::SignX509Req() pub FAIL" << std::endl;
return NULL;
}
std::cerr << "X509 Cert, prepared for signing" << std::endl;
/*** NOW The Manual signing bit (HACKED FROM asn1/a_sign.c) ***/
int (*i2d)(X509_CINF*, unsigned char**) = i2d_X509_CINF;
X509_ALGOR *algor1 = x509->cert_info->signature;
X509_ALGOR *algor2 = x509->sig_alg;
ASN1_BIT_STRING *signature = x509->signature;
X509_CINF *data = x509->cert_info;
EVP_PKEY *pkey = NULL;
const EVP_MD *type = EVP_sha1();
EVP_MD_CTX ctx;
unsigned char *p,*buf_in=NULL;
unsigned char *buf_hashout=NULL,*buf_sigout=NULL;
int i,inl=0,hashoutl=0,hashoutll=0;
int sigoutl=0,sigoutll=0;
X509_ALGOR *a;
EVP_MD_CTX_init(&ctx);
/* FIX ALGORITHMS */
a = algor1;
ASN1_TYPE_free(a->parameter);
a->parameter=ASN1_TYPE_new();
a->parameter->type=V_ASN1_NULL;
ASN1_OBJECT_free(a->algorithm);
a->algorithm=OBJ_nid2obj(type->pkey_type);
a = algor2;
ASN1_TYPE_free(a->parameter);
a->parameter=ASN1_TYPE_new();
a->parameter->type=V_ASN1_NULL;
ASN1_OBJECT_free(a->algorithm);
a->algorithm=OBJ_nid2obj(type->pkey_type);
std::cerr << "Algorithms Fixed" << std::endl;
/* input buffer */
inl=i2d(data,NULL);
buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
hashoutll=hashoutl=EVP_MD_size(type);
buf_hashout=(unsigned char *)OPENSSL_malloc((unsigned int)hashoutl);
sigoutll=sigoutl=2048; // hashoutl; //EVP_PKEY_size(pkey);
buf_sigout=(unsigned char *)OPENSSL_malloc((unsigned int)sigoutl);
if ((buf_in == NULL) || (buf_hashout == NULL) || (buf_sigout == NULL))
{
hashoutl=0;
sigoutl=0;
fprintf(stderr, "AuthSSL::SignX509Req: ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE)\n");
goto err;
}
p=buf_in;
std::cerr << "Buffers Allocated" << std::endl;
i2d(data,&p);
/* data in buf_in, ready to be hashed */
EVP_DigestInit_ex(&ctx,type, NULL);
EVP_DigestUpdate(&ctx,(unsigned char *)buf_in,inl);
if (!EVP_DigestFinal(&ctx,(unsigned char *)buf_hashout,
(unsigned int *)&hashoutl))
{
hashoutl=0;
fprintf(stderr, "AuthSSL::SignX509Req: ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB)\n");
goto err;
}
std::cerr << "Digest Applied: len: " << hashoutl << std::endl;
/* NOW Sign via GPG Functions */
if (!AuthGPG::getAuthGPG()->SignDataBin(buf_hashout, hashoutl, buf_sigout, (unsigned int *) &sigoutl))
{
sigoutl = 0;
goto err;
}
std::cerr << "Buffer Sizes: in: " << inl;
std::cerr << " HashOut: " << hashoutl;
std::cerr << " SigOut: " << sigoutl;
std::cerr << std::endl;
//passphrase = "NULL";
std::cerr << "Signature done: len:" << sigoutl << std::endl;
/* ADD Signature back into Cert... Signed!. */
if (signature->data != NULL) OPENSSL_free(signature->data);
signature->data=buf_sigout;
buf_sigout=NULL;
signature->length=sigoutl;
/* In the interests of compatibility, I'll make sure that
* the bit string has a 'not-used bits' value of 0
*/
signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
std::cerr << "Certificate Complete" << std::endl;
return x509;
err:
/* cleanup */
std::cerr << "GPGAuthMgr::SignX509Req() err: FAIL" << std::endl;
return NULL;
}
bool AuthSSL::AuthX509(X509 *x509)
{
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "AuthSSL::AuthX509() called\n");
#endif
//RsStackMutex stack(sslMtx); /******* LOCKED ******/
/* extract CN for peer Id */
std::string issuer = getX509CNString(x509->cert_info->issuer);
RsPeerDetails pd;
#ifdef AUTHSSL_DEBUG
std::cerr << "Checking GPG issuer : " << issuer << std::endl ;
#endif
if (!AuthGPG::getAuthGPG()->getGPGDetails(issuer, pd)) {
std::cerr << "AuthSSL::AuthX509() X509 NOT authenticated : AuthGPG::getAuthGPG()->getGPGDetails() returned false." << std::endl;
return false;
}
/* verify GPG signature */
/*** NOW The Manual signing bit (HACKED FROM asn1/a_sign.c) ***/
int (*i2d)(X509_CINF*, unsigned char**) = i2d_X509_CINF;
ASN1_BIT_STRING *signature = x509->signature;
X509_CINF *data = x509->cert_info;
const EVP_MD *type = EVP_sha1();
EVP_MD_CTX ctx;
unsigned char *p,*buf_in=NULL;
unsigned char *buf_hashout=NULL,*buf_sigout=NULL;
int i,inl=0,hashoutl=0,hashoutll=0;
int sigoutl=0,sigoutll=0;
X509_ALGOR *a;
EVP_MD_CTX_init(&ctx);
/* input buffer */
inl=i2d(data,NULL);
buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
hashoutll=hashoutl=EVP_MD_size(type);
buf_hashout=(unsigned char *)OPENSSL_malloc((unsigned int)hashoutl);
sigoutll=sigoutl=2048; //hashoutl; //EVP_PKEY_size(pkey);
buf_sigout=(unsigned char *)OPENSSL_malloc((unsigned int)sigoutl);
#ifdef AUTHSSL_DEBUG
std::cerr << "Buffer Sizes: in: " << inl;
std::cerr << " HashOut: " << hashoutl;
std::cerr << " SigOut: " << sigoutl;
std::cerr << std::endl;
#endif
if ((buf_in == NULL) || (buf_hashout == NULL) || (buf_sigout == NULL)) {
hashoutl=0;
sigoutl=0;
fprintf(stderr, "AuthSSL::AuthX509: ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE)\n");
goto err;
}
p=buf_in;
#ifdef AUTHSSL_DEBUG
std::cerr << "Buffers Allocated" << std::endl;
#endif
i2d(data,&p);
/* data in buf_in, ready to be hashed */
EVP_DigestInit_ex(&ctx,type, NULL);
EVP_DigestUpdate(&ctx,(unsigned char *)buf_in,inl);
if (!EVP_DigestFinal(&ctx,(unsigned char *)buf_hashout,
(unsigned int *)&hashoutl))
{
hashoutl=0;
fprintf(stderr, "AuthSSL::AuthX509: ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB)\n");
goto err;
}
#ifdef AUTHSSL_DEBUG
std::cerr << "Digest Applied: len: " << hashoutl << std::endl;
#endif
/* copy data into signature */
sigoutl = signature->length;
memmove(buf_sigout, signature->data, sigoutl);
/* NOW check sign via GPG Functions */
//get the fingerprint of the key that is supposed to sign
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::AuthX509() verifying the gpg sig with keyprint : " << pd.fpr << std::endl;
std::cerr << "Sigoutl = " << sigoutl << std::endl ;
std::cerr << "pd.fpr = " << pd.fpr << std::endl ;
std::cerr << "hashoutl = " << hashoutl << std::endl ;
#endif
if (!AuthGPG::getAuthGPG()->VerifySignBin(buf_hashout, hashoutl, buf_sigout, (unsigned int) sigoutl, pd.fpr)) {
sigoutl = 0;
goto err;
}
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::AuthX509() X509 authenticated" << std::endl;
#endif
return true;
err:
std::cerr << "AuthSSL::AuthX509() X509 NOT authenticated" << std::endl;
return false;
}
/* validate + get id */
bool AuthSSL::ValidateCertificate(X509 *x509, std::string &peerId)
{
/* check self signed */
if (!AuthX509(x509))
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::ValidateCertificate() bad certificate.";
std::cerr << std::endl;
#endif
return false;
}
if(!getX509id(x509, peerId))
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::ValidateCertificate() Cannot retrieve peer id from certificate..";
std::cerr << std::endl;
#endif
return false;
}
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::ValidateCertificate() good certificate.";
std::cerr << std::endl;
#endif
return true;
}
/* store for discovery */
//bool AuthSSL::FailedCertificate(X509 *x509, bool incoming)
//{
// std::string id;
// return ProcessX509(x509, id);
//}
bool AuthSSL::encrypt(void *&out, int &outlen, const void *in, int inlen, std::string peerId)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::encrypt() called with inlen : " << inlen << std::endl;
#endif
//TODO : use ssl to crypt the binary input buffer
out = malloc(inlen);
memcpy(out, in, inlen);
outlen = inlen;
return true ;
}
bool AuthSSL::decrypt(void *&out, int &outlen, const void *in, int inlen)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::decrypt() called with inlen : " << inlen << std::endl;
#endif
//TODO : use ssl to decrypt the binary input buffer
out = malloc(inlen);
memcpy(out, in, inlen);
outlen = inlen;
return true ;
}
/********************************************************************************/
/********************************************************************************/
/********************************************************************************/
/********************************************************************************/
/********************************************************************************/
int pem_passwd_cb(char *buf, int size, int rwflag, void *password)
{
strncpy(buf, (char *)(password), size);
buf[size - 1] = '\0';
return(strlen(buf));
}
int AuthSSL::VerifyX509Callback(int preverify_ok, X509_STORE_CTX *ctx)
{
char buf[256];
X509 *err_cert;
int err, depth;
err_cert = X509_STORE_CTX_get_current_cert(ctx);
err = X509_STORE_CTX_get_error(ctx);
depth = X509_STORE_CTX_get_error_depth(ctx);
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::VerifyX509Callback(preverify_ok: " << preverify_ok
<< " Err: " << err << " Depth: " << depth << std::endl;
#endif
/*
* Retrieve the pointer to the SSL of the connection currently treated
* and the application specific data stored into the SSL object.
*/
X509_NAME_oneline(X509_get_subject_name(err_cert), buf, 256);
#ifdef AUTHSSL_DEBUG
std::cerr << "AuthSSL::VerifyX509Callback: depth: " << depth << ":" << buf << std::endl;
#endif
if (!preverify_ok) {
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "Verify error:num=%d:%s:depth=%d:%s\n", err,
X509_verify_cert_error_string(err), depth, buf);
#endif
}
/*
* At this point, err contains the last verification error. We can use
* it for something special
*/
if (!preverify_ok)
{
X509_NAME_oneline(X509_get_issuer_name(X509_STORE_CTX_get_current_cert(ctx)), buf, 256);
#ifdef AUTHSSL_DEBUG
printf("issuer= %s\n", buf);
#endif
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "Doing REAL PGP Certificates\n");
#endif
/* do the REAL Authentication */
if (!AuthX509(X509_STORE_CTX_get_current_cert(ctx)))
{
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "AuthSSL::VerifyX509Callback() X509 not authenticated.\n");
#endif
return false;
}
std::string pgpid = getX509CNString(X509_STORE_CTX_get_current_cert(ctx)->cert_info->issuer);
if (!AuthGPG::getAuthGPG()->isGPGAccepted(pgpid) && pgpid != AuthGPG::getAuthGPG()->getGPGOwnId())
{
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "AuthSSL::VerifyX509Callback() pgp key not signed by ourself : \n");
fprintf(stderr, "issuer pgpid : ");
fprintf(stderr, "%s\n",pgpid.c_str());
fprintf(stderr, "\n AuthGPG::getAuthGPG()->getGPGOwnId() : ");
fprintf(stderr, "%s\n",AuthGPG::getAuthGPG()->getGPGOwnId().c_str());
fprintf(stderr, "\n");
#endif
return false;
}
preverify_ok = true;
} else {
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "Failing Normal Certificate!!!\n");
#endif
preverify_ok = false;
}
if (preverify_ok) {
//sslcert *cert = NULL;
std::string certId;
getX509id(X509_STORE_CTX_get_current_cert(ctx), certId);
if (!mConnMgr->isFriend(certId)) {
//we've got a new ssl id
preverify_ok = false;
}
//is the connection was initiated by us, then it was for a specific peer id wich is stored is in the context
//check that the peerid in the context is the same as the cert one
SSL *ssl = (SSL*) X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
if (SSL_get_ex_data(ssl, AuthSSL::ex_data_ctx_index)) {
char *peer_id_in_context = (char*) SSL_get_ex_data(ssl, AuthSSL::ex_data_ctx_index);
if (std::string(certId.c_str()) != std::string(peer_id_in_context)) {
//the connection was asked for a given peer and get connected top another peer
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "AuthSSL::VerifyX509Callback peer id in context not the same as cert, aborting connection.");
#endif
preverify_ok = false;
//tranfer the ip address to the new peer
peerConnectState detail;
if (mConnMgr->getFriendNetStatus(peer_id_in_context, detail)) {
mConnMgr->addFriend(certId, getX509CNString(X509_STORE_CTX_get_current_cert(ctx)->cert_info->issuer));
mConnMgr->setAddressList(certId, detail.getIpAddressList());
}
} else {
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "AuthSSL::VerifyX509Callback peer id in context is the same as cert, continung connection.");
#endif
}
}
//just to be sure
mConnMgr->addFriend(certId, getX509CNString(X509_STORE_CTX_get_current_cert(ctx)->cert_info->issuer));
//set location
mConnMgr->setLocation(certId, getX509LocString(X509_STORE_CTX_get_current_cert(ctx)->cert_info->subject));
//Check if peer isn't already connected
peerConnectState detail;
if (mConnMgr->getFriendNetStatus(certId, detail)) {
if (detail.state & RS_PEER_CONNECTED && !(detail.connecttype & RS_NET_CONN_TUNNEL)) {
#ifdef AUTHSSL_DEBUG
fprintf(stderr, "AuthSSL::VerifyX509Callback this peer is already connected, refuse a new connection.");
#endif
preverify_ok = false;
}
}
}
#ifdef AUTHSSL_DEBUG
if (preverify_ok) {
fprintf(stderr, "AuthSSL::VerifyX509Callback returned true.\n");
} else {
fprintf(stderr, "AuthSSL::VerifyX509Callback returned false.\n");
}
#endif
return preverify_ok;
}
// Not dependent on sslroot. load, and detroys the X509 memory.
int LoadCheckX509andGetLocation(const char *cert_file, std::string &location, std::string &userId)
{
/* This function loads the X509 certificate from the file,
* and checks the certificate
*/
FILE *tmpfp = fopen(cert_file, "r");
if (tmpfp == NULL)
{
std::cerr << "sslroot::LoadCheckAndGetX509Name()";
std::cerr << " Failed to open Certificate File:" << cert_file;
std::cerr << std::endl;
return 0;
}
// get xPGP certificate.
X509 *x509 = PEM_read_X509(tmpfp, NULL, NULL, NULL);
fclose(tmpfp);
if(x509 == NULL)
{
std::cerr << "PEM_read_X509 failed !!" << std::endl ;
return false ;
}
// check the certificate.
//
if (AuthSSL::getAuthSSL()->ValidateCertificate(x509, userId))
location = getX509LocString(x509->cert_info->subject);
else
{
std::cerr << "certificate validation failed !!" << std::endl ;
return false ;
}
#ifdef AUTHSSL_DEBUG
std::cerr << "getX509LocString ok. Info:" << std::endl ;
std::cout << getX509Info(x509) << std::endl ;
#endif
// clean up.
X509_free(x509);
return true ;
}
// Not dependent on sslroot. load, and detroys the X509 memory.
int LoadCheckX509andGetIssuerName(const char *cert_file, std::string &issuerName, std::string &userId)
{
/* This function loads the X509 certificate from the file,
* and checks the certificate
*/
FILE *tmpfp = fopen(cert_file, "r");
if (tmpfp == NULL)
{
#ifdef AUTHSSL_DEBUG
std::cerr << "sslroot::LoadCheckAndGetX509Name()";
std::cerr << " Failed to open Certificate File:" << cert_file;
std::cerr << std::endl;
#endif
return 0;
}
// get xPGP certificate.
X509 *x509 = PEM_read_X509(tmpfp, NULL, NULL, NULL);
fclose(tmpfp);
// check the certificate.
bool valid = false;
if (x509)
{
valid = AuthSSL::getAuthSSL()->ValidateCertificate(x509, userId);
}
if (valid)
{
// extract the name.
issuerName = getX509CNString(x509->cert_info->issuer);
}
#ifdef AUTHSSL_DEBUG
std::cout << getX509Info(x509) << std::endl ;
#endif
// clean up.
X509_free(x509);
if (valid)
{
// happy!
return 1;
}
else
{
// something went wrong!
return 0;
}
}
std::string getX509NameString(X509_NAME *name)
{
std::string namestr;
for(int i = 0; i < X509_NAME_entry_count(name); i++)
{
X509_NAME_ENTRY *entry = X509_NAME_get_entry(name, i);
ASN1_STRING *entry_data = X509_NAME_ENTRY_get_data(entry);
ASN1_OBJECT *entry_obj = X509_NAME_ENTRY_get_object(entry);
namestr += "\t";
namestr += OBJ_nid2ln(OBJ_obj2nid(entry_obj));
namestr += " : ";
//namestr += entry_obj -> flags;
//namestr += entry_data -> length;
//namestr += entry_data -> type;
//namestr += entry_data -> flags;
//entry -> set;
if (entry_data -> data != NULL)
{
namestr += (char *) entry_data -> data;
}
else
{
namestr += "NULL";
}
if (i + 1 < X509_NAME_entry_count(name))
{
namestr += "\n";
}
}
return namestr;
}
std::string getX509CNString(X509_NAME *name)
{
std::string namestr;
for(int i = 0; i < X509_NAME_entry_count(name); i++)
{
X509_NAME_ENTRY *entry = X509_NAME_get_entry(name, i);
ASN1_STRING *entry_data = X509_NAME_ENTRY_get_data(entry);
ASN1_OBJECT *entry_obj = X509_NAME_ENTRY_get_object(entry);
if (0 == strncmp("CN", OBJ_nid2sn(OBJ_obj2nid(entry_obj)), 2))
{
if (entry_data -> data != NULL)
{
namestr += (char *) entry_data -> data;
}
else
{
namestr += "Unknown";
}
return namestr;
}
}
return namestr;
}
std::string getX509TypeString(X509_NAME *name, const char *type, int len)
{
std::string namestr;
for(int i = 0; i < X509_NAME_entry_count(name); i++)
{
X509_NAME_ENTRY *entry = X509_NAME_get_entry(name, i);
ASN1_STRING *entry_data = X509_NAME_ENTRY_get_data(entry);
ASN1_OBJECT *entry_obj = X509_NAME_ENTRY_get_object(entry);
if (0 == strncmp(type, OBJ_nid2sn(OBJ_obj2nid(entry_obj)), len))
{
if (entry_data -> data != NULL)
{
namestr += (char *) entry_data -> data;
}
else
{
namestr += "Unknown";
}
return namestr;
}
}
return namestr;
}
std::string getX509LocString(X509_NAME *name)
{
return getX509TypeString(name, "L", 2);
}
std::string getX509OrgString(X509_NAME *name)
{
return getX509TypeString(name, "O", 2);
}
std::string getX509CountryString(X509_NAME *name)
{
return getX509TypeString(name, "C", 2);
}
std::string getX509Info(X509 *cert)
{
std::stringstream out;
long l;
out << "X509 Certificate:" << std::endl;
l=X509_get_version(cert);
out << " Version: " << l+1 << "(0x" << l << ")" << std::endl;
out << " Subject: " << std::endl;
out << " " << getX509NameString(cert->cert_info->subject);
out << std::endl;
out << std::endl;
out << " Signatures:" << std::endl;
return out.str();
}
std::string getX509AuthCode(X509 *x509)
{
/* get the self signature -> the first signature */
std::stringstream out;
ASN1_BIT_STRING *signature = x509->signature;
int signlen = ASN1_STRING_length(signature);
unsigned char *signdata = ASN1_STRING_data(signature);
/* extract the authcode from the signature */
/* convert it to a string, inverse of 2 bytes of signdata */
if (signlen > 2)
signlen = 2;
int j;
for(j=0;j<signlen;j++)
{
out << std::hex << std::setprecision(2) << std::setw(2)
<< std::setfill('0') << (unsigned int) (signdata[j]);
}
return out.str();
}
// filename of certificate. (SSL Only)
std::string getCertName(X509 *x509)
{
std::string name = getX509NameString(x509->cert_info->subject);
// strip out bad chars.
for(int i = 0; i < (signed) name.length(); i++)
{
if ((name[i] == '/') || (name[i] == ' ') || (name[i] == '=') ||
(name[i] == '\\') || (name[i] == '\t') || (name[i] == '\n'))
{
name[i] = '_';
}
}
return name;
}
/********** SSL ERROR STUFF ******************************************/
int printSSLError(SSL *ssl, int retval, int err, unsigned long err2,
std::ostream &out)
{
std::string reason;
std::string mainreason = std::string("UNKNOWN ERROR CODE");
if (err == SSL_ERROR_NONE)
{
mainreason = std::string("SSL_ERROR_NONE");
}
else if (err == SSL_ERROR_ZERO_RETURN)
{
mainreason = std::string("SSL_ERROR_ZERO_RETURN");
}
else if (err == SSL_ERROR_WANT_READ)
{
mainreason = std::string("SSL_ERROR_WANT_READ");
}
else if (err == SSL_ERROR_WANT_WRITE)
{
mainreason = std::string("SSL_ERROR_WANT_WRITE");
}
else if (err == SSL_ERROR_WANT_CONNECT)
{
mainreason = std::string("SSL_ERROR_WANT_CONNECT");
}
else if (err == SSL_ERROR_WANT_ACCEPT)
{
mainreason = std::string("SSL_ERROR_WANT_ACCEPT");
}
else if (err == SSL_ERROR_WANT_X509_LOOKUP)
{
mainreason = std::string("SSL_ERROR_WANT_X509_LOOKUP");
}
else if (err == SSL_ERROR_SYSCALL)
{
mainreason = std::string("SSL_ERROR_SYSCALL");
}
else if (err == SSL_ERROR_SSL)
{
mainreason = std::string("SSL_ERROR_SSL");
}
out << "RetVal(" << retval;
out << ") -> SSL Error: " << mainreason << std::endl;
out << "\t + ERR Error: " << ERR_error_string(err2, NULL) << std::endl;
return 1;
}
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