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Add gen-key for shared secret key generation

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This commit is contained in:
Ian Gulliver
2015-02-05 13:02:42 +00:00
parent d37b9a7e41
commit b396ad3317
4 changed files with 43 additions and 4 deletions
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5
Makefile
View File

@@ -1,4 +1,4 @@
all: auth-server gen-keypair
all: auth-server gen-key gen-keypair
%.o: %.cc
g++ -c -o $@ $<
@@ -6,5 +6,8 @@ all: auth-server gen-keypair
auth-server: auth-server.o crypto.o
g++ -o auth-server auth-server.o crypto.o nacl/build/instance1/lib/amd64/randombytes.o nacl/build/instance1/lib/amd64/libnacl.a
gen-key: gen-key.o crypto.o
g++ -o gen-key gen-key.o crypto.o nacl/build/instance1/lib/amd64/randombytes.o nacl/build/instance1/lib/amd64/libnacl.a
gen-keypair: gen-keypair.o crypto.o
g++ -o gen-keypair gen-keypair.o crypto.o nacl/build/instance1/lib/amd64/randombytes.o nacl/build/instance1/lib/amd64/libnacl.a

12
crypto.cc
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@@ -1,6 +1,8 @@
#include "crypto.h"
#include "nacl/build/instance1/include/amd64/crypto_box.h"
#include "nacl/build/instance1/include/amd64/crypto_secretbox.h"
#include "nacl/build/instance1/include/amd64/randombytes.h"
std::string CryptoBase::BinToHex(const std::string& bin) {
static const char *hex = "0123456789ABCDEF";
@@ -14,6 +16,12 @@ std::string CryptoBase::BinToHex(const std::string& bin) {
return ret;
}
void CryptoBase::GenKeyPair(std::string* sk, std::string* pk) {
*pk = crypto_box_keypair(sk);
void CryptoBase::GenKey(std::string* key) {
char buf[crypto_secretbox_KEYBYTES];
randombytes((unsigned char *)buf, crypto_secretbox_KEYBYTES);
*key = buf;
}
void CryptoBase::GenKeyPair(std::string* secret_key, std::string* public_key) {
*public_key = crypto_box_keypair(secret_key);
}

3
crypto.h
View File

@@ -3,5 +3,6 @@
class CryptoBase {
public:
static std::string BinToHex(const std::string& bin);
static void GenKeyPair(std::string* sk, std::string* pk);
static void GenKey(std::string* key);
static void GenKeyPair(std::string* secret_key, std::string* public_key);
};

27
gen-key.cc Normal file
View File

@@ -0,0 +1,27 @@
#include <ctime>
#include <fstream>
#include <iostream>
#include "crypto.h"
int main(int argc, char *argv[]) {
if (argc < 2) {
std::cerr << "Usage: " << argv[0] << " key_filename" << std::endl;
return 1;
}
std::string key;
CryptoBase::GenKey(&key);
{
std::fstream key_file(argv[1], std::fstream::out);
if (key_file.fail()) {
std::cerr << "Failed to open key file" << std::endl;
return 1;
}
key_file << "# Shared secret key" << std::endl;
key_file << CryptoBase::BinToHex(key) << std::endl;
}
return 0;
}