#include "stdafx.h"
int GetRSA(RSA **RsaKeys)
{
*RsaKeys=RSA_generate_key(RSALEN,RSA_F4,NULL,NULL);
if(NULL==*RsaKeys)
return -1;
return 0 ;
}
//取得私鑰
int GetPrivateKey(RSA *RsaKeys,RSA **Pvtkey)
{
*Pvtkey = RSAPrivateKey_dup(RsaKeys);
if(NULL==*Pvtkey)
return -1;
return 0;
}
//私鑰To數據流
int PrivateKeyToData(RSA *Pvtkey,unsigned char* bufkey)
{
BIO* pBio = BIO_new(BIO_s_mem());
if (pBio == NULL) {
return -1;
}
memset(bufkey,'\0',RSALEN);
if( i2d_RSAPrivateKey_bio(pBio,Pvtkey) < 0 ) {
BIO_free(pBio);
return -1;
}
BIO_read(pBio,bufkey,RSALEN);
BIO_free(pBio);
return 0;
}
//數據流To私鑰
int DataToPrivateKey(unsigned char* bufkey,RSA **Pvtkey)
{
BIO *pBio = BIO_new(BIO_s_mem());
if (pBio == NULL) {
return -1;
}
BIO_write(pBio,bufkey,RSALEN);
if( NULL == d2i_RSAPrivateKey_bio(pBio,Pvtkey)) {
BIO_free(pBio);
return -1;
}
BIO_free(pBio);
return 0;
}
//取得公鑰
int GetPublicKey(RSA *RsaKeys,RSA **Pubkey)
{
*Pubkey = RSAPublicKey_dup(RsaKeys);
if(NULL==*Pubkey)
return -1;
return 0;
}
//公鑰To數據流
int PublicKeyToData(RSA *Pubkey,unsigned char* bufkey)
{
BIO *pBio = BIO_new(BIO_s_mem());
if (pBio ==NULL) {
return -1;
}
memset(bufkey,'\0',RSALEN);
if(i2d_RSAPublicKey_bio(pBio,Pubkey) < 0) {
BIO_free(pBio);
return -1;
}
BIO_read(pBio,bufkey,RSALEN);
BIO_free(pBio);
return 0;
}
//數據流To公鑰
int DataToPublicKey(unsigned char*bufkey,RSA **Pubkey)
{
BIO * pBio=BIO_new(BIO_s_mem());
if (pBio ==NULL)
{
return -1;
}
BIO_write(pBio,bufkey,RSALEN);
if( d2i_RSAPublicKey_bio(pBio,Pubkey) < 0 ) {
BIO_free(pBio);
return -1;
}
BIO_free(pBio);
return 0;
}
/*公鑰加密->私鑰解密*/
int RSAPublicEncrypt(RSA *Publickey, char *From, char *To)
{
int len=0;
len = RSA_size(Publickey) -11;
if(-1 == (len=RSA_public_encrypt(len,(unsigned char *)From,(unsigned char *)To,Publickey,RSA_PKCS1_PADDING)) )
return -1;
return len;
}
/*私鑰解密<-公鑰加密*/
int RSAPrivateDecrypt(RSA *Privtekey, char *From, char *To)
{
if(-1 == (RSA_private_decrypt(RSALEN/8,(unsigned char *)From,(unsigned char *)To,Privtekey,RSA_PKCS1_PADDING)))
return -1;
return 0;
}
/*私鑰加密->公鑰解密*/
int RSAPrivateEncrypt(RSA *Privtekey, char *From, char *To)
{
int len = RSA_size(Privtekey)-11;
if(-1 == (len = RSA_private_encrypt(len,(unsigned char *)From,(unsigned char *)To,Privtekey,RSA_PKCS1_PADDING)))
return -1;
return len;
}
/*公鑰解密<-私鑰加密*/
int RSAPublicDecrypt(RSA *Publickey, char *From, char *To)
{
if(-1 == (RSA_public_decrypt(RSALEN/8,(unsigned char *)From,(unsigned char *)To,Publickey,RSA_PKCS1_PADDING)) )
return -1;
return 0;
}
//void DesEncrypt(char *Key,char *Msg, char *Result,int Length)
//{
// int n=0;
// DES_cblock desblock;
// DES_key_schedule schedule;
//
// DES_string_to_key(Key,&desblock);
// DES_set_key_checked( &desblock, &schedule );
//
// DES_cfb64_encrypt( (unsigned char *)Msg, (unsigned char *)Result,
// Length, &schedule, &desblock, &n, DES_ENCRYPT );
//
//}
//
//
//void DesDecrypt( char *Key, char *Msg, char *Result,int Length)
//{
//
// int n=0;
//
// DES_cblock desblock;
// DES_key_schedule schedule;
//
// DES_string_to_key(Key,&desblock);
// DES_set_key_checked( &desblock, &schedule );
//
// DES_cfb64_encrypt( (unsigned char *) Msg, (unsigned char *)Result,
// Length, &schedule, &desblock, &n, DES_DECRYPT );
//
//}
void DESGenerateKey(char *pKey)
{
int nLen=33;
int flag=0;
int i,k=0;
srand((unsigned)time(NULL));
for(i=0;i<nLen-1;i++)
{
flag=rand()%2;
if(flag)
pKey[k++]='A'+rand()%26;
else
pKey[k++]='a'+rand()%26;
}
pKey[k]='\0';
}