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fix last commit

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This commit is contained in:
wangyu 2020-07-14 12:30:20 -04:00
parent e95ee70351
commit 5340f0726e
1 changed files with 8 additions and 4 deletions
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12
encrypt.cpp
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@ -340,6 +340,7 @@ int cipher_aes128cbc_encrypt(const char *data,char *output,int &len,char * key)
int cipher_aes128cfb_encrypt(const char *data,char *output,int &len,char * key)
{
static int first_time=1;
assert(len>=16);
char buf[buf_len];
memcpy(buf,data,len);//TODO inefficient code
@ -392,17 +393,20 @@ int cipher_aes128cbc_decrypt(const char *data,char *output,int &len,char * key)
int cipher_aes128cfb_decrypt(const char *data,char *output,int &len,char * key)
{
static int first_time=1;
if(len<16) return -1;
if(aes_key_optimize)
{
if(first_time==0) key=0;
else first_time=0;
}
char buf[buf_len];
memcpy(buf,data,len);//TODO inefficient code
aes_ecb_decrypt(data,buf); //decrypt the first block
AES_CFB_decrypt_buffer((unsigned char *)output,(unsigned char *)buf,len,(unsigned char *)key,(unsigned char *)zero_iv);
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(de_padding(output,len,16)<0) return -1;
return 0;
}