delete old file

src/lc6_crypto.old

-#include <openssl/rsa.h>
-#include <openssl/pem.h>
-#include <openssl/sha.h>
-#include <openssl/rand.h>
-#include <string.h>
-#include <assert.h>
-
-#include "lc6_crypto.h"
-
-int lc6crypto_seeded = 0;
-
-libchat_user* lc6crypto_genuserkey(libchat_user *user) {
-
-	BIGNUM *bn;
-	RSA *rsa;
-	BIO *pub;
-	BIO *priv;
-	size_t publen;
-	size_t privlen;
-
-	assert(user);
-
-	bn = BN_new();
-	BN_set_word(bn, RSA_F4);
-
-	rsa = RSA_new();
-	RSA_generate_key_ex(rsa, 2048, bn, NULL);
-
-	priv = BIO_new(BIO_s_mem());
-	pub = BIO_new(BIO_s_mem());
-
-	PEM_write_bio_RSAPrivateKey(priv, rsa, NULL, NULL, 0, NULL, NULL);
-	PEM_write_bio_RSAPublicKey(pub, rsa);
-
-	RSA_free(rsa);
-
-	privlen = BIO_pending(priv);
-	publen  = BIO_pending(pub);
-
-	user->priv_key = malloc(privlen);
-	user->pub_key  = malloc(publen);
-
-
-	BIO_read(priv, user->priv_key, privlen);
-	BIO_read(pub,  user->pub_key,  publen);
-
-	user->priv_key[privlen-1] = '\0';
-	user->pub_key[publen-1]   = '\0';
-
-	BIO_free_all(priv);
-	BIO_free_all(pub);
-	BN_free(bn);
-
-	return user;
-}
-
-RSA * __lc6crypto_createRSA(unsigned char *key, int public)
-{
-	RSA *rsa= NULL;
-	BIO *keybio = NULL;
-	keybio = BIO_new_mem_buf(key, -1);
-
-	assert(keybio);
-
-	if(public) {
-		PEM_read_bio_RSA_PUBKEY(keybio, &rsa, NULL, NULL);
-	}
-	else {
-		PEM_read_bio_RSAPrivateKey(keybio, &rsa, NULL, NULL);
-	}
-
-
-	assert(rsa);
-
-	return rsa;
-}
-
-int lc6crypto_public_encrypt(
-	unsigned char *data,
-	int            data_len,
-	unsigned char *key,
-	unsigned char *enc_data)
-{
-
-	RSA *rsa = __lc6crypto_createRSA(key,1);
-	int result = RSA_public_encrypt(data_len, data, enc_data, rsa, RSA_PKCS1_OAEP_PADDING);
-	return result;
-}
-
-int lc6crypto_private_decrypt(
-	unsigned char *enc_data,
-	int            enc_len,
-	unsigned char *key,
-	unsigned char *data)
-{
-	RSA *rsa = __lc6crypto_createRSA(key,0);
-	int result = RSA_private_decrypt(enc_len, enc_data, data, rsa, RSA_PKCS1_OAEP_PADDING);
-	return result;
-}
-
-int lc6crypto_private_encrypt(
-	unsigned char *data,
-	int            data_len,
-	unsigned char *key,
-	unsigned char *enc_data)
-{
-	RSA *rsa = __lc6crypto_createRSA(key,0);
-	int result = RSA_private_encrypt(data_len, data, enc_data, rsa, RSA_PKCS1_OAEP_PADDING);
-	return result;
-}
-
-int lc6crypto_public_decrypt(
-	unsigned char *enc_data,
-	int            enc_len,
-	unsigned char *key,
-	unsigned char *data)
-{
-	RSA *rsa = __lc6crypto_createRSA(key,1);
-	int result = RSA_public_decrypt(enc_len, enc_data, data, rsa, RSA_PKCS1_OAEP_PADDING);
-	return result;
-}
-
-void lc6crypto_sha256(
-	unsigned char *data,
-	int            data_len,
-	unsigned char *hash)
-{
-	SHA256_CTX sha256;
-	SHA256_Init(&sha256);
-	SHA256_Update(&sha256, data, data_len);
-	SHA256_Final(hash, &sha256);
-}
-
-int lc6crypto_encrypt(
-	unsigned char *data,
-	int            data_len,
-	unsigned char *encrypted,
-	unsigned char *key,
-	unsigned char *iv)
-{
-	EVP_CIPHER_CTX *ctx;
-	int encrypted_len = 0;
-	int len = 0;
-
-	if(!(ctx = EVP_CIPHER_CTX_new()))
-		return -1;
-
-	if(1 != EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, key, iv)) {
-		EVP_CIPHER_CTX_free(ctx);
-		return -1;
-	}
-
-	if(1 != EVP_EncryptUpdate(ctx, encrypted, &len, data, data_len)) {
-		EVP_CIPHER_CTX_free(ctx);
-		return -1;
-	}
-	encrypted_len += len;
-
-	if(1 != EVP_EncryptFinal_ex(ctx, encrypted + len, &len)) {
-		EVP_CIPHER_CTX_free(ctx);
-		return -1;
-	}
-	encrypted_len += len;
-
-	EVP_CIPHER_CTX_free(ctx);
-
-	return encrypted_len;
-}
-
-int lc6crypto_decrypt(
-	unsigned char *encrypted,
-	int            encrypted_len,
-	unsigned char *data,
-	unsigned char *key,
-	unsigned char *iv)
-{
-	EVP_CIPHER_CTX *ctx;
-	int data_len = 0;
-	int len = 0;
-
-	if(!(ctx = EVP_CIPHER_CTX_new()))
-		return -1;
-
-	if(1 != EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, key, iv)) {
-		EVP_CIPHER_CTX_free(ctx);
-		return -1;
-	}
-
-	if(1 != EVP_DecryptUpdate(ctx, data, &len, encrypted, encrypted_len)) {
-		EVP_CIPHER_CTX_free(ctx);
-		return -1;
-	}
-	data_len += len;
-
-	if(1 != EVP_DecryptFinal_ex(ctx, encrypted + len, &len)) {
-		EVP_CIPHER_CTX_free(ctx);
-		return -1;
-	}
-	data_len += len;
-
-	EVP_CIPHER_CTX_free(ctx);
-
-	return data_len;
-}
-
-int lc6crypto_random(unsigned char *data, int data_len) {
-
-	if ( ! lc6crypto_seeded ) {
-		RAND_poll();
-		lc6crypto_seeded=1;
-	}
-
-	if ( RAND_bytes(data, data_len) != 1 )
-		return -1;
-
-	return data_len;
-}