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aes128cfb_0

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wangyu
2020-07-15 01:37:47 -04:00
parent 2f0328a41a
commit 15c15d5bcb
3 changed files with 16 additions and 4 deletions
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12
encrypt.cpp
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@@ -37,6 +37,8 @@ auth_mode_t auth_mode=auth_md5;
cipher_mode_t cipher_mode=cipher_aes128cbc;
int is_hmac_used=0;
int aes128cfb_old=0;
//TODO key negotiation and forward secrecy
int my_init_keys(const char * user_passwd,int is_client)
@@ -361,7 +363,10 @@ int cipher_aes128cfb_encrypt(const char *data,char *output,int &len,char * key)
if(first_time==0) key=0;
else first_time=0;
}
aes_ecb_encrypt(data,buf); //encrypt the first block
if(!aes128cfb_old)
{
aes_ecb_encrypt(data,buf); //encrypt the first block
}
AES_CFB_encrypt_buffer((unsigned char *)output,(unsigned char *)buf,len,(unsigned char *)key,(unsigned char *)zero_iv);
return 0;
@@ -416,9 +421,8 @@ int cipher_aes128cfb_decrypt(const char *data,char *output,int &len,char * key)
AES_CFB_decrypt_buffer((unsigned char *)output,(unsigned char *)data,len,(unsigned char *)key,(unsigned char *)zero_iv);
char buf[16];
memcpy(buf,output,16);
aes_ecb_decrypt(buf,output); //decrypt the first block
if(!aes128cfb_old)
aes_ecb_decrypt1(output); //decrypt the first block
//if(de_padding(output,len,16)<0) return -1;
return 0;
}