#ifndef _GNU_SOURCE
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#define _GNU_SOURCE /* To get defns of NI_MAXSERV and NI_MAXHOST */
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#endif
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <ifaddrs.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <linux/if_link.h>
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#include <sys/socket.h>
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#include <netpacket/packet.h>
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#include <paths.h>
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#include <stdlib.h>
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#include <cstring>
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#include <string>
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#include <system_error>
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#include <unistd.h>
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#include <sstream>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include "../os-cpp.h"
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#include "public-key.h"
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#include <openssl/evp.h>
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#include <openssl/bio.h>
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#include <openssl/pem.h>
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#include <openssl/err.h>
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namespace license {
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using namespace std;
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string OsFunctions::getModuleName() {
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char path[2048] = { 0 };
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string strPath;
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string result;
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pid_t pid = getpid();
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const string pidstr = to_string(((long) pid));
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strPath = string("/proc/") + pidstr + "/exe";
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const char * proc_path = strPath.c_str();
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int ch = readlink(proc_path, path, 2048);
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if (ch != -1) {
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path[ch] = '\0';
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result = string(path);
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} else {
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throw runtime_error(
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string("Can't find: ") + strPath + " proc filesystem mounted?");
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}
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return result;
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}
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bool OsFunctions::verifySignature(const char* stringToVerify,
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const char* signatureB64) {
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EVP_MD_CTX *mdctx = NULL;
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const char *pubKey = PUBLIC_KEY;
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BIO* bio = BIO_new_mem_buf((void*) (pubKey), strlen(pubKey));
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RSA *rsa = PEM_read_bio_RSAPublicKey(bio, NULL, NULL, NULL);
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BIO_free(bio);
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if (rsa == NULL) {
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throw new logic_error("Error reading public key");
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}
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EVP_PKEY *pkey = EVP_PKEY_new();
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EVP_PKEY_assign_RSA(pkey, rsa);
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/*BIO* bo = BIO_new(BIO_s_mem());
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BIO_write(bo, pubKey, strlen(pubKey));
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RSA *key = 0;
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PEM_read_bio_RSAPublicKey(bo, &key, 0, 0);
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BIO_free(bo);*/
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//RSA* rsa = EVP_PKEY_get1_RSA( key );
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//RSA * pubKey = d2i_RSA_PUBKEY(NULL, <der encoded byte stream pointer>, <num bytes>);
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unsigned char buffer[512];
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BIO* b64 = BIO_new(BIO_f_base64());
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BIO* encoded_signature = BIO_new_mem_buf((void *) signatureB64,
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strlen(signatureB64));
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BIO* biosig = BIO_push(b64, encoded_signature);
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BIO_set_flags(biosig, BIO_FLAGS_BASE64_NO_NL); //Do not use newlines to flush buffer
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unsigned int len = BIO_read(biosig, (void *) buffer, strlen(signatureB64));
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//Can test here if len == decodeLen - if not, then return an error
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buffer[len] = 0;
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BIO_free_all(biosig);
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/* Create the Message Digest Context */
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if (!(mdctx = EVP_MD_CTX_create())) {
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throw new logic_error("Error creating context");
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}
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if (1 != EVP_DigestVerifyInit(mdctx, NULL, EVP_sha256(), NULL, pkey)) {
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throw new logic_error("Error initializing digest");
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}
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int en = strlen(stringToVerify);
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if (1 != EVP_DigestVerifyUpdate(mdctx, stringToVerify, en)) {
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throw new logic_error("Error verifying digest");
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}
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bool result;
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int res = EVP_DigestVerifyFinal(mdctx, buffer, len);
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if (1 == res) {
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result = true;
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} else {
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result = false;
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}
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if (pkey) {
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EVP_PKEY_free(pkey);
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}
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if (mdctx) {
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EVP_MD_CTX_destroy(mdctx);
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}
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return result;
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}
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VIRTUALIZATION getVirtualization() {
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//http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html
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//
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//bool rc = true;
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/*__asm__ (
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"push %edx\n"
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"push %ecx\n"
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"push %ebx\n"
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"mov %eax, 'VMXh'\n"
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"mov %ebx, 0\n" // any value but not the MAGIC VALUE
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"mov %ecx, 10\n"// get VMWare version
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"mov %edx, 'VX'\n"// port number
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"in %eax, dx\n"// read port on return EAX returns the VERSION
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"cmp %ebx, 'VMXh'\n"// is it a reply from VMWare?
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"setz [rc] \n"// set return value
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"pop %ebx \n"
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"pop %ecx \n"
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"pop %edx \n"
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);*/
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return NONE;
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}
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}
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