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fix bug of len <0

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This commit is contained in:
wangyu
2017-08-02 20:54:32 +08:00
committed by wangyu
parent 649b69cd85
commit 501b620c35
2 changed files with 48 additions and 16 deletions
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5
encrypt.cpp
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@@ -82,6 +82,7 @@ int auth_sum_cal(const char *data,char * output,int &len)
}
int auth_sum_verify(const char *data,int &len)
{
if(len<4) return -1;
unsigned char res[4];
len-=4;
sum((unsigned char *)data,len,res);
@@ -187,8 +188,8 @@ int cipher_none_encrypt(const char *data,char *output,int &len,char * key)
}
int cipher_aes128cbc_decrypt(const char *data,char *output,int &len,char * key)
{
if(len%16 !=0) {mylog(log_debug,"len%16!=0");return -1;}
if(len<2) {mylog(log_debug,"len <2 ");return -1;}
if(len%16 !=0) {mylog(log_debug,"len%16!=0\n");return -1;}
if(len<2) {mylog(log_debug,"len <2\n");return -1;}
AES_CBC_decrypt_buffer((unsigned char *)output,(unsigned char *)data,len,(unsigned char *)key,(unsigned char *)zero_iv);
len=((unsigned char)output[len-2])*256u+((unsigned char)output[len-1]);
return 0;