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/*------------------------------------------------------------------
* estserver.c - Example application that utilizes libest.so for
* EST server operations. libest does not manage
* sockets and pthreads. This responsibility is
* placed on the application. This module shows
* a fairly trivial example of how to setup a
* listening socket and server EST requests.
*
* November, 2012
*
* Copyright (c) 2012-2013, 2016, 2017, 2018 by cisco Systems, Inc.
* All rights reserved.
**------------------------------------------------------------------
*/
#include <stdio.h>
#ifndef WIN32
#include <pthread.h>
#endif
#include <stdint.h>
#ifndef DISABLE_TSEARCH
#include <search.h>
#endif
#include <getopt.h>
#include <openssl/err.h>
#include <openssl/engine.h>
#include <openssl/conf.h>
#include <openssl/ssl.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/crypto.h>
#include <openssl/pem.h>
#include <openssl/md5.h>
#include <est.h>
#include "ossl_srv.h"
#include "../util/utils.h"
#include "../util/simple_server.h"
#include "../util/jsmn.h"
/*
* Abstract OpenSSL threading platform callbacks
*/
#ifdef WIN32
#define MUTEX_TYPE HANDLE
#define MUTEX_SETUP(x) (x) = CreateMutex(NULL, FALSE, NULL)
#define MUTEX_CLEANUP(x) CloseHandle(x)
#define MUTEX_LOCK(x) WaitForSingleObject((x), INFINITE)
#define MUTEX_UNLOCK(x) ReleaseMutex(x)
#define THREAD_ID GetCurrentThreadId()
#define snprintf _snprintf
#else
#define MUTEX_TYPE pthread_mutex_t
#define MUTEX_SETUP(x) pthread_mutex_init(&(x), NULL)
#define MUTEX_CLEANUP(x) pthread_mutex_destroy(&(x))
#define MUTEX_LOCK(x) pthread_mutex_lock(&(x))
#define MUTEX_UNLOCK(x) pthread_mutex_unlock(&(x))
#define THREAD_ID pthread_self()
#endif
#define MAX_SERVER_LEN 255
#define MAX_FILENAME_LEN 255
#define MAX_REALM_LEN 32
#define DEFAULT_ENHCD_CERT_PWD "cisco"
#define DEFAULT_ENHCD_CERT_LOCAL_PKI_NID NID_commonName
/*
* The OpenSSL CA needs this BIO to send errors too
*/
BIO *bio_err = NULL;
/*
* These are the command line options with defaults provided below
*/
static int verbose = 0;
static int write_csr = 0;
static int crl = 0;
static int pop = 0;
static int v6 = 0;
static int srp = 0;
static int enforce_csr = 0;
static int manual_enroll = 0;
int coap_mode = 0;
#if HAVE_LIBCOAP
static int dtls_handshake_timeout = EST_DTLS_HANDSHAKE_TIMEOUT_DEF;
static int dtls_handshake_mtu = EST_DTLS_HANDSHAKE_MTU_DEF;
static int dtls_session_max = EST_DTLS_SESSION_MAX_DEF;
#endif
static int port_num = 8085;
static int http_digest_auth = 0;
static int http_basic_auth = 0;
static int http_token_auth = 0;
static int http_auth_disable = 0;
static int disable_forced_http_auth = 0;
static int enable_enhcd_cert_auth = 0;
static int set_cert_auth_ah_pwd = 0;
static EST_ECA_CSR_CHECK_FLAG enhcd_cert_csr_check_on = ECA_CSR_CHECK_OFF;
static int set_cert_auth_local_nid= 0;
static int set_cert_auth_mfg_name = 0;
static int set_enhcd_cert_truststore = 0;
static int set_cert_auth_mfg_nid = 0;
static int set_fips_return = 0;
static unsigned long set_fips_error = 0;
static int test_app_data = 0xDEADBEEF;
static char priv_key_pwd[MAX_PWD_LEN];
#if ENABLE_BRSKI
static int brski_mode = 0;
static int brski_ca_certs_len;
static unsigned char *brski_ca_certs;
static char masa_root_ca_file[EST_MAX_FILE_LEN + 1];
static char masa_priv_key_file[EST_MAX_FILE_LEN + 1];
static X509 *masa_ca_root;
static EVP_PKEY *masa_ca_priv_key;
static int masa_ca_enabled = 0;
#endif
static int perf_timers_on = 0;
char certfile[EST_MAX_FILE_LEN];
char keyfile[EST_MAX_FILE_LEN];
char cert_auth_ah_pwd[MAX_PWD_LEN + 1];
char local_nid[MAX_PWD_LEN + 1];
char mfg_name[MFG_NAME_MAX_LEN + 1];
char mfg_truststore_file[EST_MAX_FILE_LEN];
char mfg_nid[MAX_PWD_LEN + 1];
char realm[MAX_REALM];
unsigned char *cacerts_raw = NULL;
int cacerts_len = 0;
unsigned char *trustcerts = NULL;
int trustcerts_len = 0;
unsigned char *enhcd_cert_truststore = NULL;
int enhcd_cert_truststore_len = 0;
SRP_VBASE *srp_db = NULL;
static char valid_token_value[MAX_AUTH_TOKEN_LEN + 1];
/*
* This is the single EST context we need for operating
* the EST server. Only a single context is required.
*/
EST_CTX *ectx;
/*
* We hard-code the DH parameters here. THIS SHOULD NOT
* be done in a real application. The DH parameters need
* to be generated at the time of product installation so
* that every instance of the product in the field has
* unique parameters. Otherwise DH key exchange would be
* vulnerable to attack.
* See the OpenSSL documentation on generating DH parameters
* for more information.
*/
static DH *get_dh1024dsa ()
{
static unsigned char dh1024_p[]={
0xC8,0x00,0xF7,0x08,0x07,0x89,0x4D,0x90,0x53,0xF3,0xD5,0x00,
0x21,0x1B,0xF7,0x31,0xA6,0xA2,0xDA,0x23,0x9A,0xC7,0x87,0x19,
0x3B,0x47,0xB6,0x8C,0x04,0x6F,0xFF,0xC6,0x9B,0xB8,0x65,0xD2,
0xC2,0x5F,0x31,0x83,0x4A,0xA7,0x5F,0x2F,0x88,0x38,0xB6,0x55,
0xCF,0xD9,0x87,0x6D,0x6F,0x9F,0xDA,0xAC,0xA6,0x48,0xAF,0xFC,
0x33,0x84,0x37,0x5B,0x82,0x4A,0x31,0x5D,0xE7,0xBD,0x52,0x97,
0xA1,0x77,0xBF,0x10,0x9E,0x37,0xEA,0x64,0xFA,0xCA,0x28,0x8D,
0x9D,0x3B,0xD2,0x6E,0x09,0x5C,0x68,0xC7,0x45,0x90,0xFD,0xBB,
0x70,0xC9,0x3A,0xBB,0xDF,0xD4,0x21,0x0F,0xC4,0x6A,0x3C,0xF6,
0x61,0xCF,0x3F,0xD6,0x13,0xF1,0x5F,0xBC,0xCF,0xBC,0x26,0x9E,
0xBC,0x0B,0xBD,0xAB,0x5D,0xC9,0x54,0x39,
};
static unsigned char dh1024_g[]={
0x3B,0x40,0x86,0xE7,0xF3,0x6C,0xDE,0x67,0x1C,0xCC,0x80,0x05,
0x5A,0xDF,0xFE,0xBD,0x20,0x27,0x74,0x6C,0x24,0xC9,0x03,0xF3,
0xE1,0x8D,0xC3,0x7D,0x98,0x27,0x40,0x08,0xB8,0x8C,0x6A,0xE9,
0xBB,0x1A,0x3A,0xD6,0x86,0x83,0x5E,0x72,0x41,0xCE,0x85,0x3C,
0xD2,0xB3,0xFC,0x13,0xCE,0x37,0x81,0x9E,0x4C,0x1C,0x7B,0x65,
0xD3,0xE6,0xA6,0x00,0xF5,0x5A,0x95,0x43,0x5E,0x81,0xCF,0x60,
0xA2,0x23,0xFC,0x36,0xA7,0x5D,0x7A,0x4C,0x06,0x91,0x6E,0xF6,
0x57,0xEE,0x36,0xCB,0x06,0xEA,0xF5,0x3D,0x95,0x49,0xCB,0xA7,
0xDD,0x81,0xDF,0x80,0x09,0x4A,0x97,0x4D,0xA8,0x22,0x72,0xA1,
0x7F,0xC4,0x70,0x56,0x70,0xE8,0x20,0x10,0x18,0x8F,0x2E,0x60,
0x07,0xE7,0x68,0x1A,0x82,0x5D,0x32,0xA2,
};
DH *dh;
#ifndef HAVE_OLD_OPENSSL
BIGNUM *p, *g;
#endif
if ((dh = DH_new()) == NULL) {
return (NULL);
}
#ifdef HAVE_OLD_OPENSSL
dh->p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), NULL);
dh->g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), NULL);
if ((dh->p == NULL) || (dh->g == NULL)) {
DH_free(dh);
return (NULL);
}
dh->length = 160;
return (dh);
#else
p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), NULL);
g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), NULL);
if ((p == NULL) || (g == NULL)) {
DH_free(dh);
return (NULL);
}
DH_set0_pqg(dh, p, NULL, g);
return (dh);
#endif
}
static int string_password_cb (char *buf, int size, int wflag, void *data)
{
strncpy(buf,priv_key_pwd, size);
return(strnlen(buf, size));
}
static void print_version (FILE *fp)
{
fprintf(fp, "Using %s\n", SSLeay_version(SSLEAY_VERSION));
}
static void show_usage_and_exit (void)
{
fprintf(stderr, "\nAvailable EST server options\n"
" -v Verbose operation\n"
" -c <file> PEM file to use for server cert\n"
" -k <file> PEM file to use for server key\n"
" -r <value> HTTP realm to present to clients. Max is 32 characters.\n"
" -l Enable CRL checks\n"
" -t Enable check for binding client PoP to the TLS UID\n"
" -m <seconds> Simulate manual CA enrollment\n"
" -n Disable HTTP authentication (TLS client auth required)\n"
" -o Disable HTTP authentication when TLS client auth succeeds\n"
" -h Use HTTP Digest auth instead of Basic auth\n"
" -b Use HTTP Basic auth. Causes explicit call to set Basic auth\n"
" -p <num> TCP port number to listen on\n"
#ifndef DISABLE_PTHREADS
" -d <seconds> Sleep timer to auto-shut the server\n"
#endif
" -f Runs EST Server in FIPS MODE = ON\n"
" -6 Enable IPv6\n"
" -w Dump the CSR to '/tmp/csr.p10' allowing for manual attribute capture on server\n"
" -? Print this help message and exit\n"
" --keypass_stdin Specify en-/decryption of private key, password read from STDIN\n"
" --keypass_arg Specify en-/decryption of private key, password read from argument\n"
" --srp <file> Enable TLS-SRP authentication of client using the specified SRP parameters file\n"
" --enforce-csr Enable CSR attributes enforcement. The client must provide all the attributes in the CSR.\n"
" --token <value> Use HTTP Bearer Token auth.\n"
" --enhcd_cert_auth Enable Enhanced Certificate Auth mode\n"
" --enhcd_cert_local_nid <nid> Sets the local PKI domain subject field NID to \n"
" grab from the peer cert. If not set the\n"
" commonName NID will be used\n"
" --cert_auth_ah_pwd <value> Specify the auth header password to use\n"
" in Enhanced Certificate Auth mode\n"
" --cert_auth_csr_check_on Enable the CSR check during Enhanced Cert Auth\n"
" --enhcd_cert_mfg_name <name> Sets name of the manufacturer to be registered\n"
" This name is required when registering a manufacturer\n"
" --enhcd_cert_mfg_truststore <file> Specifies a truststore file for an Enhanced\n"
" Certificate Auth manufacturer to select the\n"
" subject field based upon. This truststore is\n"
" required when registering a manufacturer\n"
" --enhcd_cert_mfg_nid <nid> Sets the subject field NID to\n"
" grab from the peer cert when that cert came\n"
" from the manufacturer. If not set the\n"
" commonName NID will be used\n"
#if ENABLE_BRSKI
" --enable-brski Enable BRSKI bootstrapping support.\n"
#endif
#ifdef HAVE_LIBCOAP
" --enable-coap Enable EST over CoAP support.\n"
" --dtls-handshake-timeout Set the intial value of the DTLS handshake timeout.\n"
" --dtls-handshake-mtu Set the MTU used during DTLS handshake phase.\n"
" --dtls-session-max Set the maximum number of DTLS sessions.\n"
#endif
" --perf-timers-on Enable the performance timers in server\n"
"\n");
exit(255);
}
#ifndef DISABLE_TSEARCH
/*
* The functions in this section implement a simple lookup table
* to correlate incoming cert requests after a retry operation.
* We use this to simulate the manual-enrollment mode on the CA.
*
* FIXME: we need a cleanup routine to clear the tree when this
* server shuts down. Currently any remaining entries
* in the table will not be released, resulting in a memory
* leak in the valgrind output.
*/
typedef struct {
unsigned char *data; //this will hold the pub key from the cert request
int length;
} LOOKUP_ENTRY;
LOOKUP_ENTRY *lookup_root = NULL;
/*
* Used to compare two entries in the lookup table to correlate
* incoming cert requests in the case of a retry operation.
* We use the public key from the cert as the index into the
* lookup table.
*/
int compare (const void *pa, const void *pb)
{
LOOKUP_ENTRY *a = (LOOKUP_ENTRY *) pa;
LOOKUP_ENTRY *b = (LOOKUP_ENTRY *) pb;
if (a->length > b->length) {
return 1;
}
if (a->length < b->length) {
return -1;
}
return (memcmp(a->data, b->data, a->length));
}
/*
* We use a simple lookup table to simulate manual enrollment
* of certs by the CA. This is the case where an operator
* needs to review each cert request and approve it (e.g.
* auto-enrollment is off).
*
* Return 1 if a match was found and the enrollment operation
* should proceed. Return 0 if no match was found, in which
* case we'll add the public key from the cert request into
* our lookup table so it can be correlated later.
*/
int lookup_pkcs10_request (unsigned char *pkcs10, int p10_len)
{
X509_REQ *req = NULL;
BIO *in = NULL;
BIO *out = NULL;
BIO *b64;
EVP_PKEY *pkey = NULL;
BUF_MEM *bptr;
int rv;
LOOKUP_ENTRY *l;
LOOKUP_ENTRY *n;
/*
* Decode the request into an X509_REQ structure
*/
b64 = BIO_new(BIO_f_base64());
in = BIO_new_mem_buf(pkcs10, p10_len);
in = BIO_push(b64, in);
if ((req = d2i_X509_REQ_bio(in, NULL)) == NULL) {
/* Unable to parse the request, just let this fall through
* and the enrollment will fail */
rv = 1;
goto DONE;
}
/*
* Get the public key from the request, this will be our index into
* the lookup table. Frankly, I'm not sure how a real CA
* would do this lookup. But this should be good enough for
* testing the retry-after logic.
*/
#ifdef HAVE_OLD_OPENSSL
pkey = X509_PUBKEY_get(req->req_info->pubkey);
#else
pkey = X509_PUBKEY_get(X509_REQ_get_X509_PUBKEY(req));
#endif
if (!pkey) {
rv = 1;
goto DONE;
}
out = BIO_new(BIO_s_mem());
PEM_write_bio_PUBKEY(out, pkey);
BIO_get_mem_ptr(out, &bptr);
/*
* see if we can find a match for this public key
*/
n = malloc(sizeof(LOOKUP_ENTRY));
n->data = malloc(bptr->length);
n->length = bptr->length;
memcpy(n->data, bptr->data, n->length);
l = tfind(n, (void **) &lookup_root, compare);
if (l) {
/* We have a match, allow the enrollment */
rv = 1;
tdelete(n, (void **) &lookup_root, compare);
if (verbose)
printf("\nRemoving key from lookup table:\n");
dumpbin((unsigned char*) n->data, n->length);
free(n->data);
free(n);
} else {
/* Not a match, add it to the list and return */
l = tsearch(n, (void **) &lookup_root, compare);
rv = 0;
if (verbose)
printf("\nAdding key to lookup table:\n");
dumpbin((unsigned char*) n->data, n->length);
}
DONE: if (out)
BIO_free_all(out);
if (in)
BIO_free_all(in);
if (req)
X509_REQ_free(req);
if (pkey)
EVP_PKEY_free(pkey);
return (rv);
}
#else
/*
* The functions in this section implement a simple lookup table
* to correlate incoming cert requests after a retry operation
* without the use of the search library. We use this to simulate
* the manual-enrollment mode on the CA.
*
* FIXME: we need a cleanup routine to clear the tree when this
* server shuts down. Currently any remaining entries
* in the table will not be released, resulting in a memory
* leak in the valgrind output.
*/
struct lookup_entry {
unsigned char *data; //this will hold the pub key from the cert request
int length;
struct lookup_entry * next;
};
typedef struct lookup_entry LOOKUP_ENTRY;
/*
* This is the head of our linked list
*/
struct lookup_entry *lookup_root = NULL;
static int compare(const void *pa, const void *pb)
{
LOOKUP_ENTRY *a = (LOOKUP_ENTRY *)pa;
struct lookup_entry *b = (LOOKUP_ENTRY *)pb;
if (a->length > b->length) return 1;
if (a->length < b->length) return -1;
return (memcmp(a->data, b->data, a->length));
}
static void free_lookup(void *node)
{
LOOKUP_ENTRY *n = (LOOKUP_ENTRY *)node;
if (n->data) free(n->data);
free(n);
}
static LOOKUP_ENTRY * search_list(LOOKUP_ENTRY *head, LOOKUP_ENTRY* target) {
LOOKUP_ENTRY * tmp = head;
LOOKUP_ENTRY * tmp_prev = NULL;
while (tmp && compare(tmp, target)) {
tmp_prev = tmp;
tmp = tmp->next;
}
if (tmp == NULL) {
return NULL;
}
return tmp;
}
static LOOKUP_ENTRY * delete_lookup_entry(LOOKUP_ENTRY *head, LOOKUP_ENTRY * target)
{
LOOKUP_ENTRY *tmp = head;
LOOKUP_ENTRY *tmp_prev = NULL;
/* look for the node that matches d, but also remember the node
that points to it, tmp_prev, so that we can create a new link
*/
while (tmp && compare(tmp, target))
{
tmp_prev = tmp;
tmp = tmp->next;
}
/* did we fail to find the node? */
if (tmp == NULL)
return NULL;
/* otherwise, remove the node */
if (tmp == head)
{
/* remove head of list */
head = head->next;
}
else
{
tmp_prev->next = tmp->next;
}
/* free matching node */
free_lookup(tmp);
return head;
}
static void add_entry(LOOKUP_ENTRY * head, LOOKUP_ENTRY *new_node) {
LOOKUP_ENTRY * tmp = head;
if (tmp->next == NULL) {
tmp->next = new_node;
}
else {
while (TRUE) {
if (tmp->next == NULL) {
tmp->next = new_node;
break;
}
tmp = tmp->next;
}
}
}
static void destroy_lookup_table(LOOKUP_ENTRY * head) {
LOOKUP_ENTRY * tmp;
while (head) {
tmp = head;
head = head->next;
free_lookup(tmp);
}
}
/*
* We use a simple lookup table to simulate manual enrollment
* of certs by the CA. This is the case where an operator
* needs to review each cert request and approve it (e.g.
* auto-enrollment is off).
*
* Return 1 if a match was found and the enrollment operation
* should proceed. Return 0 if no match was found, in which
* case we'll add the public key from the cert request into
* our lookup table so it can be correlated later.
*
* Windows: Rewriting to forgo the use of search.h API
* lookup table will be implemented as a basic linked list
*/
static int lookup_pkcs10_request(unsigned char *pkcs10, int p10_len)
{
X509_REQ *req = NULL;
BIO *in = NULL;
BIO *out = NULL;
BIO *b64;
EVP_PKEY *pkey = NULL;
BUF_MEM *bptr;
int rv;
LOOKUP_ENTRY *l;
LOOKUP_ENTRY *n;
/*
* Decode the request into an X509_REQ structure
*/
b64 = BIO_new(BIO_f_base64());
in = BIO_new_mem_buf(pkcs10, p10_len);
in = BIO_push(b64, in);
if ((req = d2i_X509_REQ_bio(in, NULL)) == NULL) {
/* Unable to parse the request, just let this fall through
* and the enrollment will fail */
rv = 1;
goto DONE;
}
/*
* Get the public key from the request, this will be our index into
* the lookup table. Frankly, I'm not sure how a real CA
* would do this lookup. But this should be good enough for
* testing the retry-after logic.
*/
pkey = X509_PUBKEY_get(req->req_info->pubkey);
if (!pkey) {
rv = 1;
goto DONE;
}
out = BIO_new(BIO_s_mem());
PEM_write_bio_PUBKEY(out, pkey);
BIO_get_mem_ptr(out, &bptr);
/*
* see if we can find a match for this public key
*/
n = malloc(sizeof(LOOKUP_ENTRY));
n->data = malloc(bptr->length);
n->length = bptr->length;
memcpy(n->data, bptr->data, n->length);
n->next = NULL;
l = search_list(lookup_root, n);
if (l) {
/* We have a match, allow the enrollment */
rv = 1;
lookup_root = delete_lookup_entry(lookup_root, n);
printf("\nRemoving key from lookup table:\n");
dumpbin((char*)n->data, n->length);
free(n->data);
free(n);
}
else {
/* Not a match, add it to the list and return */
if (lookup_root == NULL) {
/*
* Initialize the list
*/
lookup_root = n;
}
else {
add_entry(lookup_root, n);
}
rv = 0;
printf("\nAdding key to lookup table:\n");
dumpbin((char*)n->data, n->length);
}
DONE:
if (out)
BIO_free_all(out);
if (in)
BIO_free_all(in);
if (req)
X509_REQ_free(req);
if (pkey)
EVP_PKEY_free(pkey);
return (rv);
}
#endif
/*
* Trivial utility function to extract the string
* value of the subject name from a cert.
*/
static void extract_sub_name (X509 *cert, char *name, int len)
{
X509_NAME *subject_nm;
BIO *out;
BUF_MEM *bm;
subject_nm = X509_get_subject_name(cert);
out = BIO_new(BIO_s_mem());
X509_NAME_print_ex(out, subject_nm, 0, XN_FLAG_SEP_SPLUS_SPC);
BIO_get_mem_ptr(out, &bm);
strncpy(name, bm->data, len);
if (bm->length < len) {
name[bm->length] = 0;
} else {
name[len] = 0;
}
BIO_free(out);
}
/****************************************************************************************
* The following functions are the callbacks used by libest to bind
* the EST stack to the HTTP/SSL layer and the CA server.
***************************************************************************************/
#ifndef WIN32
pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
#else
static CRITICAL_SECTION enrollment_critical_section;
#endif
#define MAX_CERT_LEN 8192
/*
* Callback function used by EST stack to process a PKCS10
* enrollment request with the CA. The parameters are:
*
* pkcs10 Contains the CSR that should be sent to
* the CA to be signed.
* pkcs10_len Length of the CSR char array
* pcks7 Should contain the signed PKCS7 certificate
* from the CA server. You'll need allocate
* space and copy the cert into this char array.
* pkcs7_len Length of the pkcs7 char array, you will set this.
* user_id If HTTP authentication was used to identify the
* EST client, this will contain the user ID supplied
* by the client.
* peer_cert If the EST client presented a certificate to identify
* itself during the TLS handshake, this parameter will
* contain that certificate.
* path_seg If the incoming request contains a path segment it
* is extracted from the URI and passed here. Typically
* used to mux between multiple CAs or to identify a
* specific profile to use by the CA.
* app_data an optional pointer to information that is to be
* used by the application layer.
*
*/
int process_pkcs10_enrollment (unsigned char * pkcs10, int p10_len,
unsigned char **pkcs7, int *pkcs7_len,
char *user_id, X509 *peer_cert, char *path_seg,
void *app_data)
{
BIO *result = NULL;
char *buf;
#ifndef WIN32
int rc;
#endif
char sn[64];
char file_name[MAX_FILENAME_LEN];
fprintf(stderr, "Entering %s\n", __FUNCTION__);
if (verbose) {
/*
* Informational only
*/
if (user_id) {
/*
* Should be safe to log the user ID here since HTTP auth
* has succeeded at this point.
*/
printf("\n%s - User ID is %s\n", __FUNCTION__, user_id);
}
if (peer_cert) {
memset(sn, 0, 64);
extract_sub_name(peer_cert, sn, 64);
printf("\n%s - Peer cert CN is %s\n", __FUNCTION__, sn);
}
if (app_data) {
printf("ex_data value is %x\n", *((unsigned int *) app_data));
}
if (path_seg) {
printf("\nPath segment was included in enrollment URI. "
"Path Segment = %s\n", path_seg);
}
}
/*
* If we're simulating manual certificate enrollment,
* the CA will not automatically sign the cert request.
* We'll attempt to lookup in our local table if this
* cert has already been sent to us, if not, add it
* to the table and send the 'retry' message back to the
* client. But if this cert request has been seen in the
* past, then we'll continue with the enrollment.
* To summarize, we're simulating manual enrollment by
* forcing the client to request twice, and we'll automatically
* enroll on the second request.
*/
if (manual_enroll) {
if (lookup_pkcs10_request(pkcs10, p10_len)) {
/*
* We've seen this cert request in the past.
* Remove it from the lookup table and allow
* the enrollment to continue.
* Fall-thru to enrollment logic below
*/
} else {
/*
* Couldn't find this request, it's the first time
* we've seen it. Therefore, send the retry
* response.
*/
return (EST_ERR_CA_ENROLL_RETRY);
}
}
#ifndef WIN32
rc = pthread_mutex_lock(&m);
if (rc) {
printf("\nmutex lock failed rc=%d", rc);
exit(1);
}
#else
EnterCriticalSection(&enrollment_critical_section);
#endif
if (write_csr) {
/*
* Dump out pkcs10 to a file, this will contain a list of the OIDs in the CSR.
*/
snprintf(file_name, MAX_FILENAME_LEN, "/tmp/csr.p10");
write_binary_file(file_name, pkcs10, p10_len);
}
result = ossl_simple_enroll(pkcs10, p10_len);
#ifndef WIN32
rc = pthread_mutex_unlock(&m);
if (rc) {
printf("\nmutex unlock failed rc=%d", rc);
exit(1);
}
#else
LeaveCriticalSection(&enrollment_critical_section);
#endif
/*
* The result is a BIO containing the pkcs7 signed certificate
* Need to convert it to char and copy the results so we can
* free the BIO.
*/
*pkcs7_len = BIO_get_mem_data(result, (char**) &buf);
if (*pkcs7_len > 0 && *pkcs7_len < MAX_CERT_LEN) {
*pkcs7 = malloc(*pkcs7_len);
memcpy(*pkcs7, buf, *pkcs7_len);
}
BIO_free_all(result);
return EST_ERR_NONE;
}
/*
* Callback function used by EST to generate a private key
*
* p_priv_key contains a pointer to the key we will populate
*/
static int generate_private_key (EVP_PKEY **p_priv_key)
{
EVP_PKEY *priv_key = NULL;
RSA *rsa = NULL;
BIGNUM *bn = NULL;
BIO *out = NULL;
int rv = EST_ERR_NONE;
if (!p_priv_key) {
rv = EST_ERR_INVALID_PARAMETERS;
goto end;
}
rsa = RSA_new();
if (!rsa) {
rv = EST_ERR_MALLOC;
printf("***ESTCLIENT [ERROR][generate_private_key]--> Failed to allocate RSA struct");
goto end;
}
bn = BN_new();
if (!bn) {
rv = EST_ERR_MALLOC;
printf("***ESTCLIENT [ERROR][generate_private_key]--> Failed to allocate BN struct");
goto end;
}
BN_set_word(bn, 0x10001);
RSA_generate_key_ex(rsa, 4096, bn, NULL);
out = BIO_new(BIO_s_mem());
PEM_write_bio_RSAPrivateKey(out,rsa,NULL,NULL,0,NULL,NULL);
priv_key = PEM_read_bio_PrivateKey(out, NULL, NULL, NULL);
if (priv_key == NULL) {
rv = EST_ERR_PEM_READ;
printf("Error while reading PEM encoded private key BIO: ");
goto end;
}
*p_priv_key = priv_key;
end:
if (out) {
BIO_free(out);
}
if (rsa) {
RSA_free(rsa);
}
if (bn) {
BN_free(bn);
}
return rv;
}
/*
* Callback function used by EST stack to process a PKCS10
* enrollment request with the CA. The parameters are:
*
* pkcs10 Contains the CSR that should be sent to
* the CA to be signed.
* pkcs10_len Length of the CSR char array
* pcks7 Should contain the signed PKCS7 certificate
* from the CA server. You'll need allocate
* space and copy the cert into this char array.
* pkcs7_len Length of the pkcs7 char array, you will set this.
* pkcs8 Should contain the signed PKCS8 key
* from the EST server context. You'll need allocate
* space and copy the cert into this char array.
* pkcs8_len Length of the pkcs8 char array, you will set this.
* user_id If HTTP authentication was used to identify the
* EST client, this will contain the user ID supplied
* by the client.
* peer_cert If the EST client presented a certificate to identify
* itself during the TLS handshake, this parameter will
* contain that certificate.
* path_seg If the incoming request contains a path segment it
* is extracted from the URI and passed here. Typically
* used to mux between multiple CAs or to identify a
* specific profile to use by the CA.
* app_data an optional pointer to information that is to be
* used by the application layer.
*
*/
static int process_srvr_side_keygen_pkcs10_enrollment (unsigned char * pkcs10, int p10_len,
unsigned char **pkcs7, int *pkcs7_len,
unsigned char **pkcs8, int *pkcs8_len,
char *user_id, X509 *peer_cert, char *path_seg,
void *app_data)
{
BIO *result = NULL;
char *buf;
#ifndef WIN32
int rc;
#endif
char sn[64];
char file_name[MAX_FILENAME_LEN];
if (verbose) {
/*
* Informational only
*/
if (user_id) {
/*
* Should be safe to log the user ID here since HTTP auth
* has succeeded at this point.
*/
printf("\n%s - User ID is %s\n", __FUNCTION__, user_id);
}
if (peer_cert) {
memset(sn, 0, 64);
extract_sub_name(peer_cert, sn, 64);
printf("\n%s - Peer cert CN is %s\n", __FUNCTION__, sn);
}
if (app_data) {
printf("ex_data value is %x\n", *((unsigned int *) app_data));
}
if (path_seg) {
printf("\nPath segment was included in enrollment URI. "
"Path Segment = %s\n", path_seg);
}
}
/*
* If we're simulating manual certificate enrollment,
* the CA will not automatically sign the cert request.
* We'll attempt to lookup in our local table if this
* cert has already been sent to us, if not, add it
* to the table and send the 'retry' message back to the
* client. But if this cert request has been seen in the
* past, then we'll continue with the enrollment.
* To summarize, we're simulating manual enrollment by
* forcing the client to request twice, and we'll automatically
* enroll on the second request.
*/
if (manual_enroll) {
if (lookup_pkcs10_request(pkcs10, p10_len)) {
/*
* We've seen this cert request in the past.
* Remove it from the lookup table and allow
* the enrollment to continue.
* Fall-thru to enrollment logic below
*/
} else {
/*
* Couldn't find this request, it's the first time
* we've seen it. Therefore, send the retry
* response.
*/
return (EST_ERR_CA_ENROLL_RETRY);
}
}
#ifndef WIN32
rc = pthread_mutex_lock(&m);
if (rc) {
printf("\nmutex lock failed rc=%d", rc);
exit(1);
}
#else
EnterCriticalSection(&enrollment_critical_section);
#endif
if (write_csr) {
/*
* Dump out pkcs10 to a file, this will contain a list of the OIDs in the CSR.
*/
snprintf(file_name, MAX_FILENAME_LEN, "/tmp/csr.p10");
write_binary_file(file_name, pkcs10, p10_len);
}
result = ossl_simple_enroll(pkcs10, p10_len);
#ifndef WIN32
rc = pthread_mutex_unlock(&m);
if (rc) {
printf("\nmutex unlock failed rc=%d", rc);
exit(1);
}
#else
LeaveCriticalSection(&enrollment_critical_section);
#endif
/*
* The result is a BIO containing the pkcs7 signed certificate
* Need to convert it to char and copy the results so we can
* free the BIO.
*/
*pkcs7_len = BIO_get_mem_data(result, (char**) &buf);
if (*pkcs7_len > 0 && *pkcs7_len < MAX_CERT_LEN) {
*pkcs7 = malloc(*pkcs7_len);
memcpy(*pkcs7, buf, *pkcs7_len);
}
BIO_free_all(result);
return EST_ERR_NONE;
}
//The following is a default CSR attributes response that also
//contains challengePassword
#define TEST_CSR "MCYGBysGAQEBARYGCSqGSIb3DQEJAQYFK4EEACIGCWCGSAFlAwQCAg=="
unsigned char * process_csrattrs_request (int *csr_len, char *path_seg, X509 *peer_cert,
void *app_data)
{
unsigned char *csr_data;
char *t = NULL;
int t_len;
if (path_seg) {
printf("\nPath segment was included in csrattrs URI. "
"Path Segment = %s\n", path_seg);
}
t = getenv("EST_CSR_ATTR");
if (t) {
t_len = strlen(t);
csr_data = malloc(t_len + 1);
strncpy((char *) csr_data, t, t_len);
*csr_len = t_len;
} else {
*csr_len = sizeof(TEST_CSR);
csr_data = malloc(*csr_len + 1);
strcpy((char *) csr_data, TEST_CSR);
}
return (csr_data);
}
#if ENABLE_BRSKI
static int jsoneq(const char *json, jsmntok_t *tok, const char *s) {
if (tok->type == JSMN_STRING && (int) strlen(s) == tok->end - tok->start &&
strncmp(json + tok->start, s, tok->end - tok->start) == 0) {
return 0;
}
return -1;
}
static int dump(const char *js, jsmntok_t *t, size_t count, int indent) {
int i, j, k;
if (count == 0) {
return 0;
}
if (t->type == JSMN_PRIMITIVE) {
printf("%.*s", t->end - t->start, js+t->start);
return 1;
} else if (t->type == JSMN_STRING) {
printf("'%.*s'", t->end - t->start, js+t->start);
return 1;
} else if (t->type == JSMN_OBJECT) {
printf("\n");
j = 0;
for (i = 0; i < t->size; i++) {
for (k = 0; k < indent; k++) printf(" ");
j += dump(js, t+1+j, count-j, indent+1);
printf(": ");
j += dump(js, t+1+j, count-j, indent+1);
printf("\n");
}
return j+1;
} else if (t->type == JSMN_ARRAY) {
j = 0;
printf("\n");
for (i = 0; i < t->size; i++) {
for (k = 0; k < indent-1; k++) printf(" ");
printf(" - ");
j += dump(js, t+1+j, count-j, indent+1);
printf("\n");
}
return j+1;
}
return 0;
}
/* { */
/* "ietf-voucher:voucher": { */
/* "nonce": "62a2e7693d82fcda2624de58fb6722e5", */
/* "assertion": "logging" */
/* "pinned-domain-cert": "<base64 encoded certificate>" */
/* "serial-number": "JADA123456789" */
/* } */
/* } */
#define BRSKI_DEVICE_SERIAL_NUM "F7BE0D"
#define VOUCHER "{\n\r\"ietf-voucher:voucher\":{\n\r\"nonce\":\"%s\",\n\r\"assertion\":\"logging\",\n\r\"pinned-domain-cert\":\"%s\",\n\r\"serial-number\":\"%s\"}\n\r}"
/*
* Callback function used by EST stack to process a BRSK
* voucher request. The parameters are:
*
* voucher_req Contains the voucher request from the client
* voucher_req_len Length of the voucher request
* voucher Pointer to a buffer pointer that will contain
* the voucher to be returned
* voucher_len Pointer to an integer that will be set to the length
* of the returned voucher.
* peer_cert - client certificate, if available, in internal X509
* structure format
*/
EST_BRSKI_CALLBACK_RC
process_brski_voucher_request (char *voucher_req, int voucher_req_len,
char **voucher, int *voucher_len, X509 *peer_cert)
{
char *voucher_buf = NULL;
jsmn_parser p;
jsmntok_t *tok;
size_t tokcount = 100;
int parser_resp;
int i;
int nonce_found = 0;
int incoming_server_cert_found = 0;
char incoming_nonce[EST_BRSKI_VOUCHER_REQ_NONCE_SIZE+1];
char incoming_server_cert[EST_BRSKI_MAX_CACERT_LEN+1];
char *ser_num_str = NULL;
char *signed_voucher_buf;
BUF_MEM *buf_mem_ptr;
BIO *voucher_bio = NULL;
#ifdef CMS_SIGNING
BIO *cms_bio_out = NULL;
CMS_ContentInfo *voucher_cms = NULL;
#else
PKCS7 *voucher_p7 = NULL;
BIO *out = NULL;
#ifdef BASE64_ENCODE_VOUCHERS
BIO *b64 = NULL;
#endif /* BASE64_ENCODE_VOUCHERS */
#endif
int rc;
EST_BRSKI_CALLBACK_RC rv = EST_BRSKI_CB_FAILURE;
memset(incoming_nonce, 0, EST_BRSKI_VOUCHER_REQ_NONCE_SIZE+1);
memset(incoming_server_cert, 0, EST_BRSKI_MAX_CACERT_LEN+1);
printf("BRSKI voucher request received\n");
printf(" voucher_req = %s\n voucher_req_len = %d\n",
voucher_req, voucher_req_len);
/*
* Parse the voucher request and obtain the nonce
*/
jsmn_init(&p);
tok = calloc(tokcount, sizeof(*tok));
if (tok == NULL) {
printf("calloc(): errno=%d\n", errno);
return 3;
}
parser_resp = jsmn_parse(&p, (char *)voucher_req, (size_t)voucher_req_len,
tok, tokcount);
if (parser_resp < 0) {
printf("Voucher request parse failed. parse error = %d\n", parser_resp);
} else {
dump((char *)voucher_req, tok, p.toknext, 0);
printf("Voucher request parsed\n");
}
for (i = 1; i < parser_resp; i++) {
if (jsoneq(voucher_req, &tok[i], "nonce") == 0) {
sprintf(incoming_nonce, "%.*s", tok[i+1].end-tok[i+1].start,
voucher_req + tok[i+1].start);
printf("Found nonce %s\n", incoming_nonce);
nonce_found = 1;
break;
}
}
if (!nonce_found) {
printf("Nonce missing from voucher request\n");
free(tok);
return (EST_BRSKI_CB_FAILURE);
}
/*
* Now look for the Registrar's cert
*/
for (i = 1; i < parser_resp; i++) {
if (jsoneq(voucher_req, &tok[i], "proximity-registrar-cert") == 0) {
sprintf(incoming_server_cert, "%.*s", tok[i+1].end-tok[i+1].start,
voucher_req + tok[i+1].start);
printf("Found proximity registrar cert %s\n", incoming_server_cert);
incoming_server_cert_found = 1;
break;
}
}
free(tok);
tok = NULL;
if (!incoming_server_cert_found) {
printf("Proximity registrar cert missing from voucher request\n");
return (EST_BRSKI_CB_FAILURE);
}
/*
* Obtain the serial number of the pledge device from its ID cert
*/
ser_num_str = est_find_ser_num_in_subj(peer_cert);
if (ser_num_str == NULL) {
char *subj;
printf("Pledge MFG cert does not contain a serial number.");
subj = X509_NAME_oneline(X509_get_subject_name(peer_cert), NULL, 0);
printf("Client MFG cert subject: %s", subj);
OPENSSL_free(subj);
return (EST_ERR_CLIENT_BRSKI_SERIAL_NUM_MISSING);
}
voucher_buf = calloc(EST_BRSKI_MAX_VOUCHER_LEN, sizeof(char));
if (voucher_buf) {
*voucher_len = snprintf(voucher_buf, EST_BRSKI_MAX_VOUCHER_LEN, VOUCHER,
incoming_nonce, brski_ca_certs, ser_num_str);
*voucher = voucher_buf;
printf("Voucher to be returned = %s\n", *voucher);
} else {
*voucher = NULL;
*voucher_len = 0;
rv = (EST_BRSKI_CB_FAILURE);
goto end;
}
/*
* If the MASA CA has been enabled then sign the voucher with the MASA's
* signing key
*/
if (masa_ca_enabled) {
signed_voucher_buf = calloc(EST_BRSKI_MAX_VOUCHER_LEN, sizeof(char));
if (signed_voucher_buf == NULL) {
printf("calloc(): errno=%d\n", errno);
*voucher = NULL;
*voucher_len = 0;
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
voucher_bio = BIO_new_mem_buf(voucher_buf, *voucher_len);
if (voucher_bio == NULL) {
printf("Unable to assign voucher to BIO");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
#ifdef CMS_SIGNING
voucher_cms = CMS_sign(masa_ca_root, masa_ca_priv_key, NULL, voucher_bio,
(CMS_BINARY|CMS_NOSMIMECAP));
if (voucher_cms == NULL) {
printf("Unable to sign voucher");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
#else
voucher_p7 = PKCS7_sign(masa_ca_root, masa_ca_priv_key, NULL, voucher_bio,
(PKCS7_BINARY|PKCS7_NOSMIMECAP));
if (voucher_p7 == NULL) {
printf("Unable to sign voucher");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
#endif
/*
* For now, this is not going to be set. It eventually needs to be set to the
* OID assigned to represent "JSON-encoded voucher" per voucher profile 06,
* "An eContentType of TBD1 indicates the content is a JSON- encoded voucher."
*/
#if 0
/* Set inner content type to signed PKCS7 receipt */
/* PDB NOTE: probably not needed. It appears that it's already set to
* this contentType */
if (!CMS_set1_eContentType(voucher_p7, OBJ_nid2obj(NID_pkcs7_signed))) {
printf("Unable to assign ContentType to CMS structure");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
#endif
#ifdef CMS_SIGNING
/*
* convert it into something that can be sent in the voucher
* response
*/
cms_bio_out = BIO_new(BIO_s_mem());
if (cms_bio_out == NULL) {
printf("Unable to create output BIO");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
rc = PEM_write_bio_CMS(cms_bio_out, voucher_cms);
if (rc == 0) {
printf("Unable to assign voucher to output BIO");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
/* char buf[1024*20]; */
/* memset(&buf[0], 0, 1024*20); */
BIO_get_mem_ptr(cms_bio_out, &buf_mem_ptr);
memcpy(signed_voucher_buf, buf_mem_ptr->data, buf_mem_ptr->length);
/* len = BIO_get_mem_data(cms_bio_out, (char**) &buf); */
/* printf("%d\n", len); */
/* rc = PEM_write_bio_CMS_stream(cms_bio_out, voucher_cms, ); */
/* if (!rc) { */
/* printf("Error in PEM_write_bio_PKCS7"); */
/* ossl_dump_ssl_errors(); */
/* return (EST_BRSKI_CB_FAILURE); */
/* } */
*voucher = signed_voucher_buf;
*voucher_len = buf_mem_ptr->length;
rv = EST_BRSKI_CB_SUCCESS;
#else /* PKCS7 signing */
#ifdef BASE64_ENCODE_VOUCHERS
b64 = BIO_new(BIO_f_base64());
if (!b64) {
printf("BIO_new failed for b64 output BIO");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
#endif /* BASE64_ENCODE_VOUCHERS */
out = BIO_new(BIO_s_mem());
if (!out) {
printf("BIO_new failed for output BIO");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
#ifdef BASE64_ENCODE_VOUCHERS
out = BIO_push(b64, out);
#endif /* BASE64_ENCODE_VOUCHERS */
rc = i2d_PKCS7_bio(out, voucher_p7);
(void)BIO_flush(out);
if (!rc) {
printf("Unable to assign voucher to output BIO");
ossl_dump_ssl_errors();
*voucher = NULL;
*voucher_len = 0;
free(signed_voucher_buf);
rv = (EST_BRSKI_CB_FAILURE);
goto end_masa_ca;
}
BIO_get_mem_ptr(out, &buf_mem_ptr);
memcpy(signed_voucher_buf, buf_mem_ptr->data, buf_mem_ptr->length);
/*
* Return the signed voucher
*/
*voucher = signed_voucher_buf;
*voucher_len = buf_mem_ptr->length;
rv = EST_BRSKI_CB_SUCCESS;
#endif
end_masa_ca:
if(voucher_bio) {
BIO_free_all(voucher_bio);
}
if (voucher_buf) {
free(voucher_buf);
}
}
end:
#ifdef CMS_SIGNING
if (voucher_cms) {
CMS_ContentInfo_free(voucher_cms)
}
if(cms_bio_out){
BIO_free(cms_bio_out);
}
#else
if(voucher_p7) {
PKCS7_free(voucher_p7);
}
if(out){
BIO_free_all(out);
}
#endif
return rv;
}
/*
* Callback function used by EST stack to process a BRSK
* voucher status indication. The parameters are:
*
* voucher_status Pointer buffer containing the voucher status
* voucher_status_len Integer containing the length of the voucher_status buffer
* peer_cert certificate of the client used in the TLS connection.
*
*/
static
EST_BRSKI_CALLBACK_RC
process_brski_voucher_status (char *voucher_status, int voucher_status_len, X509 *peer_cert)
{
jsmn_parser p;
jsmntok_t *tok;
size_t tokcount = 100;
int parser_resp;
int i;
int status_found = 0;
char incoming_status[5+1];
int reason_found = 0;
char incoming_reason[EST_BRSKI_MAX_REASON_LEN];
memset(incoming_status, 0, 5+1);
printf("BRSKI voucher status received\n");
printf(" voucher_status = %s\n voucher_status_len = %d\n",
voucher_status, voucher_status_len);
/*
* Parse the voucher response and obtain the status and reason
*/
jsmn_init(&p);
tok = calloc(tokcount, sizeof(*tok));
if (tok == NULL) {
printf("calloc(): errno=%d\n", errno);
return 3;
}
parser_resp = jsmn_parse(&p, (char *)voucher_status, (size_t)voucher_status_len,
tok, tokcount);
if (parser_resp < 0) {
printf("Voucher response parse failed. parse error = %d\n", parser_resp);
} else {
dump((char *)voucher_status, tok, p.toknext, 0);
printf("Voucher status parsed\n");
}
for (i = 1; i < parser_resp; i++) {
if (jsoneq(voucher_status, &tok[i], "Status") == 0) {
sprintf(incoming_status, "%.*s", tok[i+1].end-tok[i+1].start,
voucher_status + tok[i+1].start);
printf("Found status %s\n", incoming_status);
status_found = 1;
break;
}
}
if (!status_found) {
printf("Status value missing from voucher status\n");
free(tok);
return (EST_BRSKI_CB_FAILURE);
}
for (i = 1; i < parser_resp; i++) {
if (jsoneq(voucher_status, &tok[i], "Reason") == 0) {
sprintf(incoming_reason, "%.*s", tok[i+1].end-tok[i+1].start,
voucher_status + tok[i+1].start);
printf("Found reason %s\n", incoming_reason);
reason_found = 1;
break;
}
}
free(tok);
tok = NULL;
if (!reason_found) {
printf("Reason value missing from voucher status\n");
return (EST_BRSKI_CB_FAILURE);
}
return EST_BRSKI_CB_SUCCESS;
}
/*
* Callback function used by EST stack to process a BRSK
* enrollment status. The parameters are:
*
* enroll_status Pointer buffer containing the voucher status
* enroll_status_len Integer containing the length of the voucher_status buffer
* peer_cert certificate of the client used in the TLS connection.
*/
EST_BRSKI_CALLBACK_RC
process_brski_enroll_status (char *enroll_status, int enroll_status_len, X509 *peer_cert)
{
jsmn_parser p;
jsmntok_t *tok;
size_t tokcount = 100;
int parser_resp;
int i;
int status_found = 0;
char incoming_status[5+1];
int reason_found = 0;
char incoming_reason[EST_BRSKI_MAX_REASON_LEN];
memset(incoming_status, 0, 5+1);
printf("BRSKI enroll status received\n");
printf(" enroll_status = %s\n enroll_status_len = %d\n",
enroll_status, enroll_status_len);
/*
* Parse the voucher response and obtain the status and reason
*/
jsmn_init(&p);
tok = calloc(tokcount, sizeof(*tok));
if (tok == NULL) {
printf("calloc(): errno=%d\n", errno);
return 3;
}
parser_resp = jsmn_parse(&p, (char *)enroll_status, (size_t)enroll_status_len,
tok, tokcount);
if (parser_resp < 0) {
printf("Enroll response parse failed. parse error = %d\n", parser_resp);
} else {
dump((char *)enroll_status, tok, p.toknext, 0);
printf("Enroll status parsed\n");
}
for (i = 1; i < parser_resp; i++) {
if (jsoneq(enroll_status, &tok[i], "Status") == 0) {
sprintf(incoming_status, "%.*s", tok[i+1].end-tok[i+1].start,
enroll_status + tok[i+1].start);
printf("Found status %s\n", incoming_status);
status_found = 1;
break;
}
}
if (!status_found) {
printf("Status value missing from enroll status\n");
free(tok);
return (EST_BRSKI_CB_FAILURE);
}
for (i = 1; i < parser_resp; i++) {
if (jsoneq(enroll_status, &tok[i], "Reason") == 0) {
sprintf(incoming_reason, "%.*s", tok[i+1].end-tok[i+1].start,
enroll_status + tok[i+1].start);
printf("Found reason: %s\n", incoming_reason);
reason_found = 1;
break;
}
}
free(tok);
tok = NULL;
if (!reason_found) {
printf("Reason value missing from enroll status\n");
return (EST_BRSKI_CB_FAILURE);
}
return EST_BRSKI_CB_SUCCESS;
}
/*
* This function is used to read the CERTS in a BIO and build a
* stack of X509* pointers. This is used during the PEM to
* PKCS7 conversion process.
*/
static int est_add_certs_from_BIO (STACK_OF(X509) *stack, BIO *in)
{
int count = 0;
int ret = -1;
STACK_OF(X509_INFO) * sk = NULL;
X509_INFO *xi;
/* This loads from a file, a stack of x509/crl/pkey sets */
sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
if (sk == NULL) {
printf("Unable to read certs from PEM encoded data");
return (ret);
}
/* scan over it and pull out the CRL's */
while (sk_X509_INFO_num(sk)) {
xi = sk_X509_INFO_shift(sk);
if (xi->x509 != NULL) {
sk_X509_push(stack, xi->x509);
xi->x509 = NULL;
count++;
}
X509_INFO_free(xi);
}
ret = count;
/* never need to OPENSSL_free x */
if (sk != NULL) {
sk_X509_INFO_free(sk);
}
return (ret);
}
/*
* Converts from PEM to pkcs7 encoded certs. Optionally
* applies base64 encoding to the output. This is used
* when creating the cached cacerts response. The returned
* BIO contains the PKCS7 encoded certs. The response
* can optionally be base64 encoded by passing in a
* non-zero value for the do_base_64 argument. The caller
* of this function should invoke BIO_free_all() on the
* return value to avoid memory leaks. Note, BIO_free()
* will not be sufficient.
*/
static
BIO * est_get_certs_pkcs7 (BIO *in, int do_base_64)
{
STACK_OF(X509) * cert_stack = NULL;
PKCS7_SIGNED *p7s = NULL;
PKCS7 *p7 = NULL;
BIO *out = NULL;
BIO *b64;
int buflen = 0;
/*
* Create a PKCS7 object
*/
if ((p7 = PKCS7_new()) == NULL) {
printf("pkcs7_new failed");
goto cleanup;
}
/*
* Create the PKCS7 signed object
*/
if ((p7s = PKCS7_SIGNED_new()) == NULL) {
printf("pkcs7_signed_new failed");
goto cleanup;
}
/*
* Set the version
*/
if (!ASN1_INTEGER_set(p7s->version, 1)) {
printf("ASN1_integer_set failed");
goto cleanup;
}
/*
* Create a stack of X509 certs
*/
if ((cert_stack = sk_X509_new_null()) == NULL) {
printf("stack malloc failed");
goto cleanup;
}
/*
* Populate the cert stack
*/
if (est_add_certs_from_BIO(cert_stack, in) < 0) {
printf("Unable to load certificates");
ossl_dump_ssl_errors();
goto cleanup;
}
/*
* Create the BIO which will receive the output
*/
out = BIO_new(BIO_s_mem());
if (!out) {
printf("BIO_new failed");
goto cleanup;
}
/*
* Add the base64 encoder if needed
*/
if (do_base_64) {
b64 = BIO_new(BIO_f_base64());
if (b64 == NULL) {
printf("BIO_new failed while attempting to create base64 BIO");
ossl_dump_ssl_errors();
goto cleanup;
}
out = BIO_push(b64, out);
}
p7->type = OBJ_nid2obj(NID_pkcs7_signed);
p7->d.sign = p7s;
p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data);
p7s->cert = cert_stack;
/*
* Convert from PEM to PKCS7
*/
buflen = i2d_PKCS7_bio(out, p7);
if (!buflen) {
printf("PEM_write_bio_PKCS7 failed");
ossl_dump_ssl_errors();
BIO_free_all(out);
out = NULL;
goto cleanup;
}
(void)BIO_flush(out);
cleanup:
/*
* Only need to cleanup p7. This frees up the p7s and
* cert_stack allocations for us since these are linked
* to the p7.
*/
if (p7) {
PKCS7_free(p7);
}
return out;
}
static
EST_ERROR est_load_ca_certs (unsigned char *raw, int size)
{
BIO *cacerts = NULL;
BIO *in;
unsigned char *retval;
in = BIO_new_mem_buf(raw, size);
if (in == NULL) {
printf("Unable to open the raw cert buffer");
return (EST_ERR_LOAD_CACERTS);
}
/*
* convert the CA certs to PKCS7 encoded char array
* This is used by an EST server to respond to the
* cacerts request.
*/
cacerts = est_get_certs_pkcs7(in, 1);
if (!cacerts) {
printf("est_get_certs_pkcs7 failed");
BIO_free(in);
return (EST_ERR_LOAD_CACERTS);
}
brski_ca_certs_len = (int) BIO_get_mem_data(cacerts, (char**)&retval);
if (brski_ca_certs_len <= 0) {
printf("Failed to copy PKCS7 data");
BIO_free_all(cacerts);
BIO_free(in);
return (EST_ERR_LOAD_CACERTS);
}
brski_ca_certs = calloc(brski_ca_certs_len, sizeof(char));
if (!brski_ca_certs) {
printf("calloc failed");
BIO_free_all(cacerts);
BIO_free(in);
return (EST_ERR_LOAD_CACERTS);
}
memcpy(brski_ca_certs, retval, brski_ca_certs_len);
BIO_free_all(cacerts);
BIO_free(in);
return (EST_ERR_NONE);
}
/*
* Used to set up the MASA credentials to be used to sign vouchers
*/
int set_brski_masa_credentials (char *masa_root_ca_file, char *masa_priv_key_file)
{
BIO *certin;
/*
* read in the MASA CA root cert
*/
if (masa_root_ca_file[0]) {
certin = BIO_new(BIO_s_file());
if (certin == NULL) {
printf("Unable to create BIO");
return (-1);
}
if (BIO_read_filename(certin, masa_root_ca_file) <= 0) {
printf("\nUnable to read MASA root CA certificate file %s\n",
masa_root_ca_file);
return (-1);
}
/*
* Read the file. Expected to be PEM encoded.
*/
masa_ca_root = PEM_read_bio_X509(certin, NULL, NULL, NULL);
if (masa_ca_root == NULL) {
printf("\nError while reading PEM encoded MASA CA Root certificate file %s\n",
masa_root_ca_file);
return (-1);
}
BIO_free(certin);
}
/*
* Read in the matching MASA private key
*/
if (masa_priv_key_file[0]) {
masa_ca_priv_key = read_private_key(masa_priv_key_file, PEM_def_callback);
if (masa_ca_priv_key == NULL) {
printf("\nError while reading PEM encoded MASA CA private key file %s\n",
masa_priv_key_file);
return (-1);
}
}
masa_ca_enabled = 1;
return (0);
}
#endif
static char digest_user[3][34] = { "estuser", "estrealm", ""};
/*
* This callback is invoked by libEST when performing
* HTTP authentication of the EST client. libEST will
* parse the auth credentials from the HTTP header. We
* must validate the user ourselves since libEST does
* not maintain a user database. This allows us to hook
* into a Radius server, or some other external user
* database.
*
* For this example code, we simply have a local hard-coded
* user database.
*
* Return 1 to signal the user is valid, 0 to fail the auth
*/
int process_http_auth (EST_CTX *ctx, EST_HTTP_AUTH_HDR *ah, X509 *peer_cert,
char *path_seg, void *app_data)
{
int user_valid = 0;
char *digest;
char *user = "estuser";
char *pass = "estpwd";
if (path_seg) {
printf("\nPath segment was included in authenticate URI. "
"Path Segment = %s\n", path_seg);
}
switch (ah->mode) {
case AUTH_BASIC:
/*
* this is where we might hook into a Radius server
* or some external database to authenticate a
* userID/password. But for this example code,
* we just hard-code a local user for testing
* the libEST API.
*/
if (enable_enhcd_cert_auth) {
user = "/CN=127.0.0.1";
pass = set_cert_auth_ah_pwd ? cert_auth_ah_pwd : DEFAULT_ENHCD_CERT_PWD;
}
if (!strcmp(ah->user, user) && !strcmp(ah->pwd, pass)) {
/* The user is valid */
user_valid = 1;
}
break;
case AUTH_DIGEST:
/*
* Check the user's name
*/
if (strcmp(ah->user, digest_user[0])) {
return 0;
}
/*
* Call the helper function to calculate the digest,
* This is then compared against the digest provided
* by the client.
*/
digest = est_server_generate_auth_digest(ah, digest_user[2]);
if (!strncmp(digest, ah->response, 32)) {
user_valid = 1;
}
free(digest);
break;
case AUTH_TOKEN:
/*
* The bearer token has just been passed up from the EST Server
* library. Assuming it's an OAuth 2.0 based access token, it would
* now be sent along to the OAuth Authorization Server. The
* Authorization Server would return either a success or failure
* response.
*/
printf("\nConfigured for HTTP Token Authentication\n");
printf(
"Configured access token = %s \nClient access token received = %s\n\n",
ah->auth_token, valid_token_value);
if (!strcmp(ah->auth_token, valid_token_value)) {
/* The token is currently valid */
user_valid = 1;
}
break;
case AUTH_FAIL:
case AUTH_NONE:
default:
return 0;
break;
}
return user_valid;
}
/*
* This callback is issued during the TLS-SRP handshake.
* We can use this to get the userid from the TLS-SRP handshake.
* If a verifier file as provided, we must pull the SRP verifier
* parameters and invoke SSL_set_srp_server_param() with these
* values to allow the TLS handshake to succeed. If the application
* layer wants to use their own verifier store, they would
* hook into it here. They would lookup the verifier parameters
* based on the userid and return those parameters by invoking
* SSL_set_srp_server_param().
*/
static int process_ssl_srp_auth (SSL *s, int *ad, void *arg)
{
char *login = SSL_get_srp_username(s);
SRP_user_pwd *user;
if (!login)
return (-1);
user = SRP_VBASE_get1_by_user(srp_db, login);
if (user == NULL) {
printf("User doesn't exist in SRP database\n");
return SSL3_AL_FATAL;
}
/*
* Get the SRP parameters for the user from the verifier database.
* Provide these parameters to TLS to complete the handshake
*/
if (SSL_set_srp_server_param(s, user->N, user->g, user->s, user->v,
user->info) < 0) {
*ad = SSL_AD_INTERNAL_ERROR;
return SSL3_AL_FATAL;
}
printf("SRP parameters set: username = \"%s\" info=\"%s\" \n", login,
user->info);
SRP_user_pwd_free(user);
user = NULL;
login = NULL;
fflush(stdout);
return SSL_ERROR_NONE;
}
#ifdef HAVE_OLD_OPENSSL
/*
* We're using OpenSSL, both as the CA and libest
* requires it. OpenSSL requires these platform specific
* locking callbacks to be set when multi-threaded support
* is needed.
*/
static MUTEX_TYPE *mutex_buf = NULL;
static void locking_function (int mode, int n, const char * file, int line)
{
if (mode & CRYPTO_LOCK)
MUTEX_LOCK(mutex_buf[n]);
else
MUTEX_UNLOCK(mutex_buf[n]);
}
static unsigned long id_function (void)
{
return ((unsigned long) THREAD_ID);
}
#endif
/*
* This routine destroys the EST context and frees
* up other resources to prevent a memory leak.
*/
void cleanup (void)
{
#ifdef HAVE_OLD_OPENSSL
int i;
#endif
est_server_stop(ectx);
est_destroy(ectx);
if (srp_db) {
SRP_VBASE_free(srp_db);
}
#ifdef HAVE_OLD_OPENSSL
/*
* Tear down the mutexes used by OpenSSL
*/
if (!mutex_buf)
return;
CRYPTO_set_id_callback(NULL);
CRYPTO_set_locking_callback(NULL);
for (i = 0; i < CRYPTO_num_locks(); i++)
MUTEX_CLEANUP(mutex_buf[i]);
free(mutex_buf);
mutex_buf = NULL;
#endif
BIO_free(bio_err);
free(cacerts_raw);
free(trustcerts);
free(enhcd_cert_truststore);
est_apps_shutdown();
#ifndef WIN32
pthread_mutex_destroy(&m);
#else
DeleteCriticalSection(&enrollment_critical_section);
#endif
}
/*
* This is the main entry point into the example EST server.
* This routine parses the command line options, reads in the
* cert chains, creates an EST context, initializes the HTTP
* layer (mongoose), and starts a simple TCP server to accept
* incoming EST requests.
*/
int main (int argc, char **argv)
{
char c;
#ifdef HAVE_OLD_OPENSSL
int i;
#endif
#if ENABLE_BRSKI
int rc;
#endif
X509 *x;
EVP_PKEY * priv_key;
BIO *certin;
DH *dh;
EST_ERROR rv;
int sleep_delay = 0;
int retry_period = 300;
char vfile[255];
int option_index = 0;
pem_password_cb *priv_key_cb = NULL;
int nid;
#ifdef HAVE_LIBCOAP
int coap_rc;
#endif
static struct option long_options[] = {
{"srp", 1, NULL, 0},
{"enforce-csr", 0, NULL, 0},
{"token", 1, 0, 0},
#if ENABLE_BRSKI
{"enable-brski", 0, 0, 0},
{"masa-root-ca", 1, 0, 0 },
{"masa-priv-key", 1, 0, 0 },
#endif
{"keypass", 1, 0, 0},
{"keypass_stdin", 1, 0, 0 },
{"keypass_arg", 1, 0, 0 },
#ifdef HAVE_LIBCOAP
{"enable-coap", 0, 0, 0},
{"dtls-handshake-timeout", 1, 0, 0},
{"dtls-handshake-mtu", 1, 0, 0},
{"dtls-session-max", 1, 0, 0},
#endif
{"enhcd_cert_auth", 0, 0, 0},
{"cert_auth_ah_pwd", 1, 0, 0},
{"cert_auth_csr_check_on", 0, 0, 0},
{"enhcd_cert_local_nid", 1, 0, 0},
{"enhcd_cert_mfg_name", 1, 0, 0},
{"enhcd_cert_mfg_truststore", 1, 0, 0},
{"enhcd_cert_mfg_nid", 1, 0, 0},
{"perf-timers-on", 0, 0, 0},
{NULL, 0, NULL, 0}
};
#ifdef WIN32
InitializeCriticalSection(&enrollment_critical_section);
#endif
/* Show usage if -h or --help options are specified */
if ((argc == 1)
|| (argc == 2
&& (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")))) {
show_usage_and_exit();
}
#if ENABLE_BRSKI
memset(masa_root_ca_file, 0, EST_MAX_FILE_LEN+1);
memset(masa_priv_key_file, 0, EST_MAX_FILE_LEN+1);
#endif
while ((c = getopt_long(argc, argv, "?fhbwnovr:c:k:m:p:d:lt6", long_options,
&option_index)) != -1) {
switch (c) {
case 0:
#if 0
printf("option %s", long_options[option_index].name);
if (optarg) {
printf(" with arg %s", optarg);
}
printf("\n");
#endif
if (!strncmp(long_options[option_index].name, "srp",
strlen("srp"))) {
srp = 1;
strncpy(vfile, optarg, 255);
}
if (!strncmp(long_options[option_index].name, "enforce-csr",
strlen("enforce-csr"))) {
enforce_csr = 1;
}
if (!strncmp(long_options[option_index].name, "token",
strlen("token"))) {
http_token_auth = 1;
memset(valid_token_value, 0, MAX_AUTH_TOKEN_LEN + 1);
strncpy(&(valid_token_value[0]), optarg, MAX_AUTH_TOKEN_LEN);
}
if (!strncmp(long_options[option_index].name,"keypass_stdin", strlen("keypass_stdin"))) {
priv_key_cb = PEM_def_callback;
}
if (!strncmp(long_options[option_index].name,"keypass_arg", strlen("keypass_arg"))) {
strncpy(priv_key_pwd, optarg, MAX_PWD_LEN);
priv_key_cb = string_password_cb;
}
if (!strncmp(long_options[option_index].name,"enhcd_cert_auth",
strlen("enhcd_cert_auth"))) {
enable_enhcd_cert_auth = 1;
}
if (!strncmp(long_options[option_index].name,"cert_auth_ah_pwd",
strlen("cert_auth_ah_pwd"))) {
strncpy(cert_auth_ah_pwd, optarg, MAX_PWD_LEN + 1);
set_cert_auth_ah_pwd = 1;
}
if (!strncmp(long_options[option_index].name,"cert_auth_csr_check_on",
strlen("cert_auth_csr_check_on"))) {
enhcd_cert_csr_check_on = ECA_CSR_CHECK_ON;
}
if (!strncmp(long_options[option_index].name,"enhcd_cert_local_nid",
strlen("enhcd_cert_local_nid"))) {
strncpy(local_nid, optarg, MAX_PWD_LEN + 1);
set_cert_auth_local_nid = 1;
}
if (!strncmp(long_options[option_index].name,"enhcd_cert_mfg_name",
strlen("enhcd_cert_mfg_name"))) {
strncpy(mfg_name, optarg, MFG_NAME_MAX_LEN + 1);
set_cert_auth_mfg_name = 1;
}
if (!strncmp(long_options[option_index].name,"enhcd_cert_mfg_truststore",
strlen("enhcd_cert_mfg_truststore"))) {
strncpy(mfg_truststore_file, optarg, EST_MAX_FILE_LEN);
set_enhcd_cert_truststore = 1;
}
if (!strncmp(long_options[option_index].name,"enhcd_cert_mfg_nid",
strlen("enhcd_cert_mfg_nid"))) {
strncpy(mfg_nid, optarg, MAX_PWD_LEN + 1);
set_cert_auth_mfg_nid = 1;
}
#if ENABLE_BRSKI
if (!strncmp(long_options[option_index].name, "enable-brski",
strlen("enable-brski"))) {
brski_mode = 1;
}
if (!strncmp(long_options[option_index].name,"masa-root-ca", strlen("masa-root-ca"))) {
strncpy(masa_root_ca_file, optarg, EST_MAX_FILE_LEN);
}
if (!strncmp(long_options[option_index].name,"masa-priv-key", strlen("masa-priv-key"))) {
strncpy(masa_priv_key_file, optarg, EST_MAX_FILE_LEN);
}
rc = set_brski_masa_credentials(masa_root_ca_file, masa_priv_key_file);
if (rc == -1) {
printf("\nUnable to read and set the MASA root CA credentials\n");
}
#endif
#ifdef HAVE_LIBCOAP
if (!strncmp(long_options[option_index].name, "enable-coap",
strlen("enable-coap"))) {
coap_mode = 1;
}
if (!strncmp(long_options[option_index].name, "dtls-handshake-timeout",
strlen("dtls-handshake-timeout"))) {
dtls_handshake_timeout = atoi(optarg);
}
if (!strncmp(long_options[option_index].name, "dtls-handshake-mtu",
strlen("dtls-handshake-mtu"))) {
dtls_handshake_mtu = atoi(optarg);
}
if (!strncmp(long_options[option_index].name, "dtls-session-max",
strlen("dtls-session-max"))) {
dtls_session_max = atoi(optarg);
}
#endif
if (!strncmp(long_options[option_index].name,"perf-timers-on",
strlen("perf-timers-on"))) {
perf_timers_on = 1;
}
break;
case 'm':
manual_enroll = 1;
retry_period = atoi(optarg);
break;
case 'h':
http_digest_auth = 1;
break;
case 'b':
http_basic_auth = 1;
break;
case 'w':
write_csr = 1;
break;
case 'n':
http_auth_disable = 1;
break;
case 'o':
disable_forced_http_auth = 1;
break;
case 'v':
verbose = 1;
break;
case 'l':
crl = 1;
break;
case 't':
pop = 1;
break;
case '6':
v6 = 1;
break;
#ifndef DISABLE_PTHREADS
case 'd':
sleep_delay = atoi(optarg);
break;
#endif
case 'p':
port_num = atoi(optarg);
break;
case 'c':
strncpy(certfile, optarg, EST_MAX_FILE_LEN);
break;
case 'k':
strncpy(keyfile, optarg, EST_MAX_FILE_LEN);
break;
case 'r':
if (strnlen(optarg, MAX_REALM_LEN+1) > MAX_REALM_LEN) {
printf("\nRealm value is too large. Max is 32 characters\n");
exit(1);
}
strncpy(realm, optarg, MAX_REALM_LEN);
break;
case 'f':
/* turn FIPS on if user requested it
* and exit if failure.
*/
set_fips_return = EVP_default_properties_enable_fips(NULL, 1);
if (set_fips_return != 1) {
set_fips_error = ERR_get_error();
printf("\nERROR WHILE SETTING FIPS MODE ON exiting ....\n");
exit(1);
} else {
printf("\nRunning EST Sample Server with FIPS MODE = ON !\n");
}
;
break;
default:
show_usage_and_exit();
break;
}
}
argc -= optind;
argv += optind;
if (verbose) {
print_version(stdout);
}
if (getenv("EST_CSR_ATTR")) {
printf("\nUsing CSR Attributes: %s", getenv("EST_CSR_ATTR"));
}
if (!getenv("EST_CACERTS_RESP")) {
printf("\nEST_CACERTS_RESP file not set, set this env variable to resolve");
exit(1);
}
if (!getenv("EST_TRUSTED_CERTS")) {
printf("\nEST_TRUSTED_CERTS file not set, set this env variable to resolve");
exit(1);
}
/*
* Read in the CA certificates
*/
cacerts_len = read_binary_file(getenv("EST_CACERTS_RESP"), &cacerts_raw);
if (cacerts_len <= 0) {
printf("\nEST_CACERTS_RESP file could not be read\n");
exit(1);
}
/*
* Read in the trusted CA certificates for the local TLS context
*/
if (getenv("EST_TRUSTED_CERTS")) {
trustcerts_len = read_binary_file(getenv("EST_TRUSTED_CERTS"),
&trustcerts);
if (trustcerts_len <= 0) {
printf("\nEST_TRUSTED_CERTS file could not be read\n");
exit(1);
}
}
est_apps_startup();
/*
* Read in the local server certificate
*/
certin = BIO_new(BIO_s_file());
if (BIO_read_filename(certin, certfile) <= 0) {
printf("\nUnable to read server certificate file %s\n", certfile);
exit(1);
}
/*
* This reads the file, which is expected to be PEM encoded. If you're using
* DER encoded certs, you would invoke d2i_X509_bio() instead.
*/
x = PEM_read_bio_X509(certin, NULL, NULL, NULL);
if (x == NULL) {
printf("\nError while reading PEM encoded server certificate file %s\n",
certfile);
exit(1);
}
BIO_free(certin);
/*
* Read in the server's private key
*/
priv_key = read_private_key(keyfile, priv_key_cb);
if (priv_key == NULL) {
printf("\nError while reading PEM encoded server private key file %s\n",
keyfile);
ERR_print_errors_fp(stderr);
exit(1);
}
bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
if (!bio_err) {
printf("\nBIO not working\n");
exit(1);
}
if (verbose) {
est_init_logger(EST_LOG_LVL_INFO, NULL);
est_enable_backtrace(1);
} else {
est_init_logger(EST_LOG_LVL_ERR, NULL);
}
ectx = est_server_init(trustcerts, trustcerts_len, cacerts_raw, cacerts_len,
EST_CERT_FORMAT_PEM, realm, x, priv_key);
if (!ectx) {
printf("\nUnable to initialize EST context. Aborting!!!\n");
exit(1);
}
est_set_ex_data(ectx, &test_app_data);
if (enforce_csr) {
est_server_enforce_csrattr(ectx);
}
/*
* Change the retry-after period. This is not
* necessary, it's only shown here as an example.
*/
if (verbose)
printf("\nRetry period being set to: %d \n", retry_period);
est_server_set_retry_period(ectx, retry_period);
if (crl) {
est_enable_crl(ectx);
}
if (!pop) {
if (verbose)
printf("\nDisabling PoP check");
est_server_disable_pop(ectx);
}
if (srp) {
srp_db = SRP_VBASE_new(NULL);
if (!srp_db) {
printf("\nUnable allocate SRP verifier database. Aborting!!!\n");
exit(1);
}
if (SRP_VBASE_init(srp_db, vfile) != SRP_NO_ERROR) {
printf("\nUnable initialize SRP verifier database. Aborting!!!\n");
exit(1);
}
if (est_server_enable_srp(ectx, &process_ssl_srp_auth)) {
printf("\nUnable to enable SRP. Aborting!!!\n");
exit(1);
}
}
if (est_set_ca_enroll_cb(ectx, &process_pkcs10_enrollment)) {
printf(
"\nUnable to set EST pkcs10 enrollment callback. Aborting!!!\n");
exit(1);
}
/*
* We use the same handler for re-enrollment. Our little toy
* CA doesn't do anything special for re-enrollment. A real
* CA would need to implement the requirements in section
* 4.2 of the EST draft.
*/
if (est_set_ca_reenroll_cb(ectx, &process_pkcs10_enrollment)) {
printf(
"\nUnable to set EST pkcs10 enrollment callback. Aborting!!!\n");
exit(1);
}
/*
* Set server-side key generation callback
*/
if (est_set_server_side_keygen_enroll_cb(ectx, &process_srvr_side_keygen_pkcs10_enrollment)) {
printf(
"\nUnable to set EST server-side keygen enrollment callback. Aborting!!!\n");
exit(1);
}
if (est_server_set_key_generation_cb(ectx, &generate_private_key)) {
printf(
"\nUnable to set EST server-side key generation callback. Aborting!!!\n");
exit(1);
}
if (est_set_csr_cb(ectx, &process_csrattrs_request)) {
printf("\nUnable to set EST CSR Attributes callback. Aborting!!!\n");
exit(1);
}
#if ENABLE_BRSKI
if (brski_mode) {
/*
* register the brski call backs.
*/
if (est_set_brski_voucher_req_cb(ectx, &process_brski_voucher_request)) {
printf(
"\nUnable to set EST BRSKI voucher request callback. Aborting!!!\n");
exit(1);
}
if (est_set_brski_voucher_status_cb(ectx, &process_brski_voucher_status)) {
printf(
"\nUnable to set EST BRSKI voucher request callback. Aborting!!!\n");
exit(1);
}
if (est_set_brski_enroll_status_cb(ectx, &process_brski_enroll_status)) {
printf(
"\nUnable to set EST BRSKI voucher request callback. Aborting!!!\n");
exit(1);
}
/*
* For EST /cacerts, the CA certs response can be processed two ways,
* they can be provided to the EST library and the library responds
* directly, or the application layer can provide a call back and
* it provides the response buffer containing the CA certs. The estserver
* test app does it the first way, so the EST library responds directly.
* With BRSKI, this response of the CA certs is contained in the voucher, so
* the application layer needs to be responsible for preparing the response.
* The following code is replicated from the EST library.
*/
if (est_load_ca_certs(cacerts_raw, cacerts_len)) {
printf("Failed to load CA certificates response buffer");
}
}
#endif
if (!http_auth_disable) {
if (est_set_http_auth_cb(ectx, &process_http_auth)) {
printf("\nUnable to set EST HTTP AUTH callback. Aborting!!!\n");
exit(1);
}
}
if (disable_forced_http_auth) {
if (verbose)
printf(
"\nDisabling HTTP authentication when TLS client auth succeeds\n");
if (est_set_http_auth_required(ectx, HTTP_AUTH_NOT_REQUIRED)) {
printf("\nUnable to disable required HTTP auth. Aborting!!!\n");
exit(1);
}
}
if (http_digest_auth) {
MD5_CTX c;
int len;
static unsigned char ha1_input_buf[32*3+2];
unsigned char md[17];
int i;
rv = est_server_set_auth_mode(ectx, AUTH_DIGEST);
if (rv != EST_ERR_NONE) {
printf(
"\nUnable to enable HTTP digest authentication. Aborting!!!\n");
exit(1);
}
/*
* Cache away the realm value and build the HA1
*/
strncpy(digest_user[1], realm, MAX_REALM_LEN);
len = sprintf((char *)ha1_input_buf, "%s:%s:%s", "estuser", realm, "estpwd");
MD5_Init(&c);
MD5_Update(&c, ha1_input_buf, len);
MD5_Final((unsigned char *)md, &c);
printf("\nDigest HA1 value = ");
memset(digest_user[2], 0, 32);
for(i = 0; i < 16; i++){
sprintf(&(digest_user[2][i*2]),"%.2x", (unsigned char) md[i]);
printf("%c%c", digest_user[2][i*2], digest_user[2][i*2+1]);
}
printf("\n");
}
if (http_basic_auth) {
rv = est_server_set_auth_mode(ectx, AUTH_BASIC);
if (rv != EST_ERR_NONE) {
printf(
"\nUnable to enable HTTP basic authentication. Aborting!!!\n");
exit(1);
}
}
if (http_token_auth) {
rv = est_server_set_auth_mode(ectx, AUTH_TOKEN);
if (rv != EST_ERR_NONE) {
printf(
"\nUnable to enable HTTP token authentication. Aborting!!!\n");
exit(1);
}
}
if (enable_enhcd_cert_auth) {
if (!set_cert_auth_ah_pwd) {
strncpy(cert_auth_ah_pwd, DEFAULT_ENHCD_CERT_PWD, MAX_PWD_LEN);
}
if (set_cert_auth_local_nid) {
nid = OBJ_txt2nid(local_nid);
if (nid != NID_undef) {
rv = est_server_enable_enhanced_cert_auth(
ectx, nid, (const char *)cert_auth_ah_pwd,
enhcd_cert_csr_check_on);
} else {
printf(
"\nUnknown subject field NID specified. See ASN1_OBJECT \n"
"long and short names that can be specified.\n");
exit(1);
}
} else {
rv = est_server_enable_enhanced_cert_auth(
ectx, DEFAULT_ENHCD_CERT_LOCAL_PKI_NID,
(const char *)cert_auth_ah_pwd, enhcd_cert_csr_check_on);
}
if (rv != EST_ERR_NONE) {
printf("\nUnable to enable Enhanced Cert Authentication. "
"Aborting!!!\n");
exit(1);
}
if (set_enhcd_cert_truststore || set_cert_auth_mfg_name) {
/*
* One cannot be present without the other to register a
* manufacturer
*/
if (!set_enhcd_cert_truststore || !set_cert_auth_mfg_name) {
printf("\nBoth the manufacturer name and truststore file must\n"
"be provided to register a manufacturer\n");
exit(1);
}
enhcd_cert_truststore_len =
read_binary_file(mfg_truststore_file, &enhcd_cert_truststore);
if (enhcd_cert_truststore_len <= 0) {
printf("\nCould not read the Enhanced Cert Auth truststore "
"file\n");
exit(1);
}
if (set_cert_auth_mfg_nid) {
nid = OBJ_txt2nid(mfg_nid);
if (nid != NID_undef) {
rv = est_server_enhanced_cert_auth_add_mfg_info(
ectx, mfg_name, nid, enhcd_cert_truststore,
enhcd_cert_truststore_len);
} else {
printf("\nUnknown subject field NID specified. See "
"ASN1_OBJECT \n"
"long and short names that can be specified.\n");
exit(1);
}
} else {
rv = est_server_enhanced_cert_auth_add_mfg_info(
ectx, mfg_name, DEFAULT_ENHCD_CERT_LOCAL_PKI_NID,
enhcd_cert_truststore, enhcd_cert_truststore_len);
}
if (rv != EST_ERR_NONE) {
printf("\nUnable to register Enhanced Cert Auth manufacturer. "
"Aborting!!!\n");
exit(1);
}
}
} else {
if (set_cert_auth_ah_pwd || set_cert_auth_local_nid ||
set_cert_auth_mfg_name || set_enhcd_cert_truststore ||
set_cert_auth_mfg_nid) {
printf("Enhanced Cert Auth must be enabled to specify the following"
"parameters:\n");
if (set_cert_auth_ah_pwd) {
printf("- cert_auth_ah_pwd\n");
}
if (set_cert_auth_local_nid) {
printf("- enhcd_cert_local_nid\n");
}
if (set_cert_auth_mfg_name) {
printf("- enhcd_cert_mfg_name\n");
}
if (set_enhcd_cert_truststore) {
printf("- enhcd_cert_mfg_truststore\n");
}
if (set_cert_auth_mfg_nid) {
printf("- enhcd_cert_mfg_nid\n");
}
printf("\n");
show_usage_and_exit();
}
}
if (perf_timers_on) {
est_enable_performance_timers(ectx);
}
/*
* Set DH parameters for TLS
*/
dh = get_dh1024dsa();
if (dh) {
est_server_set_dh_parms(ectx, dh);
}
DH_free(dh);
#ifdef HAVE_OLD_OPENSSL
/*
* Install thread locking mechanism for OpenSSL
*/
mutex_buf = malloc(CRYPTO_num_locks() * sizeof(MUTEX_TYPE));
if (!mutex_buf) {
printf("Cannot allocate mutexes");
exit(1);
}
for (i = 0; i < CRYPTO_num_locks(); i++)
MUTEX_SETUP(mutex_buf[i]);
CRYPTO_set_id_callback(id_function);
CRYPTO_set_locking_callback(locking_function);
#endif
printf("\nLaunching EST server...\n");
if (coap_mode) {
#if !(HAVE_LIBCOAP)
printf("\nestserver not built with coap support and --enable-coap has been specified.\n");
exit(1);
#else
if (dtls_handshake_timeout != 0) {
printf("\nSetting the DTLS handshake initial timeout value to: %d\n", dtls_handshake_timeout);
rv = est_server_set_dtls_handshake_timeout(ectx, dtls_handshake_timeout);
if (rv != EST_ERR_NONE) {
printf("\nUnable to set the DTLS handshake initial timeout value. "
"Aborting!!!\n");
exit(1);
}
}
if (dtls_handshake_mtu != 0) {
printf("\nSetting the DTLS handshake MTU value to: %d\n", dtls_handshake_mtu);
rv = est_server_set_dtls_handshake_mtu(ectx, dtls_handshake_mtu);
if (rv != EST_ERR_NONE) {
printf("\nUnable to set the DTLS handshake MTU value. "
"Aborting!!!\n");
exit(1);
}
}
if (dtls_session_max != 0) {
printf("\nSetting the DTLS session max value to: %d\n", dtls_session_max);
rv = est_server_set_dtls_session_max(ectx, dtls_session_max);
if (rv != EST_ERR_NONE) {
printf("\nUnable to set the DTLS session max value. "
"Aborting!!!\n");
exit(1);
}
}
coap_rc = est_server_coap_init_start(ectx, port_num);
if (coap_rc != 0) {
printf("\nFailed to init the coap library into server mode\n");
exit(1);
}
#endif
}
else {
rv = est_server_start(ectx);
if (rv != EST_ERR_NONE) {
printf("\nFailed to init mg (rv=%d)\n", rv);
exit(1);
}
}
fflush(stdout);
/*
* Start the simple server, which opens a TCP
* socket, waits for incoming connections, and
* invokes the EST handler for each connection.
*
* If CoAP is enabled, then the master thread will
* turn over control of the socket to the coap library
*/
start_simple_server(ectx, port_num, sleep_delay, v6);
cleanup();
EVP_PKEY_free(priv_key);
X509_free(x);
return 0;
}
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