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#include <algorithm>
#include <string>
#include <regex>
#include <openssl/md5.h>
#include "LibSip_Steps.hh"
#include "loggers.hh"
#include "converter.hh"
namespace LibSip__Steps {
int calculate_md5(const std::string& p_data, std::string& p_md5)
{
loggers::get_instance().log(">>> calculate_md5: %s", p_data.c_str());
MD5_CTX md5_context;
::MD5_Init(&md5_context);
loggers::get_instance().log("calculate_md5: length=%d", p_data.length());
::MD5_Update(&md5_context, p_data.c_str(), p_data.length()); // TODO Add support of block size > 512
const size_t digestlen = 16;
unsigned char digest[digestlen];
::MD5_Final(digest, &md5_context);
p_md5 = converter::get_instance().bytes_to_hexa(std::vector<unsigned char>(digest, digest + digestlen));
loggers::get_instance().log("<<< calculate_md5: %s", p_md5.c_str());
return 0;
}
CHARSTRING fx__rndStr() {
static const char alphanum[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
static int length = 10;
char s[length] = { 0 };
for (int i = 0; i < length - 1; ++i) {
s[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
} // End of 'for' statement
return CHARSTRING(s);
};
CHARSTRING fx__putInLowercase(const CHARSTRING& p__string) {
std::string s(static_cast<const char*>(p__string));
std::transform(s.begin(), s.end(), s.begin(), ::tolower);
return CHARSTRING(s.c_str());
};
CHARSTRING fx__getIpAddr(const CHARSTRING& p__host__name) { return CHARSTRING(""); };
CHARSTRING fx__calculateDigestResponse(const CHARSTRING& p__nonce, const CHARSTRING& p__cnonce, const CHARSTRING& p__user, const CHARSTRING& p__realm, const CHARSTRING& p__passwd, const CHARSTRING& p__alg, const CHARSTRING& p__nonceCount, const CHARSTRING& p__method, const CHARSTRING& p__qop, const CHARSTRING& p__URI, const CHARSTRING& p__HEntity) {
loggers::get_instance().log(">>> fx__calculateDigestResponse");
// Buid a1=USERNAME:REALM:PASSWORD
std::string a1(static_cast<const char*>(p__user));
a1 += ":";
a1 += static_cast<const char*>(p__realm);
a1 += ":";
a1 += static_cast<const char*>(p__passwd);
if (a1.find("\"") != std::string::npos) {
a1 = std::regex_replace(a1, std::regex("\""), "");
}
loggers::get_instance().log("fx__calculateDigestResponse: a1='%s'", a1.c_str());
std::string md5_a1;
calculate_md5(a1, md5_a1);
// Buid a2=METHOD:DIGESTURI
std::string a2(static_cast<const char*>(p__method));
a2 += ":";
a2 += static_cast<const char*>(p__URI);
if (a2.find("\"") != std::string::npos) {
a2 = std::regex_replace(a2, std::regex("\""), ""); // TODO Move to converter
}
loggers::get_instance().log("fx__calculateDigestResponse: a2='%s'", a2.c_str());
std::string md5_a2;
calculate_md5(a2, md5_a2);
// Buid resp=HA1:NONCE:HA2
std::string resp(md5_a1);
resp += ":";
resp += static_cast<const char*>(p__nonce);
resp += ":";
resp += md5_a2;
loggers::get_instance().log("fx__calculateDigestResponse: resp='%s'", resp.c_str());
std::string md5_resp;
calculate_md5(resp, md5_resp);
// Convert into Base64
std::vector<unsigned char> u = converter::get_instance().string_to_bytes(md5_resp);
md5_resp = converter::get_instance().bytes_to_string(converter::get_instance().buffer_to_base64(u));
loggers::get_instance().log("<<< fx__calculateDigestResponse: '%s'", md5_resp.c_str());
return CHARSTRING(md5_resp.c_str());
};
CHARSTRING fx__encodeBase64(const CHARSTRING& p__value) {
std::vector<unsigned char> s(static_cast<const char*>(p__value), static_cast<const char*>(p__value) + p__value.lengthof());
std::vector<unsigned char> o = converter::get_instance().buffer_to_base64(s);
return CHARSTRING(o.size(), (const char*)o.data());
};
CHARSTRING fx__decodeBase64(const CHARSTRING& p__value) {
std::vector<unsigned char> s(static_cast<const char*>(p__value), static_cast<const char*>(p__value) + p__value.lengthof());
std::vector<unsigned char> o = converter::get_instance().base64_to_buffer(s);
return CHARSTRING(o.size(), (const char*)o.data());
};
} // End of namespace LibSip__Steps