ps.c

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#include <stdlib.h>
#include <3ds.h>

static Handle psHandle;

Result psInit()
{
    return srvGetServiceHandle(&psHandle, "ps:ps"); 
}

Result psExit()
{
    return svcCloseHandle(psHandle);
}

Result PS_EncryptDecryptAes(u32 size, u8* in, u8* out, u32 aes_algo, u32 key_type, u8* iv)
{
    Result ret = 0;
    u32 *cmdbuf = getThreadCommandBuffer();
    
    u32 *_iv = (u32*)iv;

    cmdbuf[0] = 0x000401C4;
    cmdbuf[1] = size;
    cmdbuf[2] = _iv[0];
    cmdbuf[3] = _iv[1];
    cmdbuf[4] = _iv[2];
    cmdbuf[5] = _iv[3];
    cmdbuf[6] = aes_algo;
    cmdbuf[7] = key_type;
    cmdbuf[8] = (size << 0x8) | 0x4;
    cmdbuf[9] = (u32)in;
    cmdbuf[10] = (size << 0x8) | 0x14;
    cmdbuf[11] = (u32)out;
    
    if((ret = svcSendSyncRequest(psHandle))!=0)return ret;

    _iv[0] = cmdbuf[2];
    _iv[1] = cmdbuf[3];
    _iv[2] = cmdbuf[4];
    _iv[3] = cmdbuf[5];
    
    return (Result)cmdbuf[1];
}

Result PS_EncryptSignDecryptVerifyAesCcm(u8* in, u32 in_size, u8* out, u32 out_size, u32 data_len, u32 mac_data_len, u32 mac_len, u32 aes_algo, u32 key_type, u8* nonce)
{
    Result ret = 0;
    u32 *cmdbuf = getThreadCommandBuffer();
    
    u32 *_nonce = (u32*)nonce;

    cmdbuf[0] = 0x00050284;
    cmdbuf[1] = in_size;
    cmdbuf[2] = out_size;
    cmdbuf[3] = mac_data_len;
    cmdbuf[4] = data_len;
    cmdbuf[5] = mac_len;
    cmdbuf[6] = _nonce[0];
    cmdbuf[7] = _nonce[1];
    cmdbuf[8] = _nonce[2];
    cmdbuf[9] = aes_algo;
    cmdbuf[10] = key_type;
    cmdbuf[8] = (in_size << 0x8) | 0x4;
    cmdbuf[9] = (u32)in;
    cmdbuf[10] = (out_size << 0x8) | 0x14;
    cmdbuf[11] = (u32)out;
    
    if((ret = svcSendSyncRequest(psHandle))!=0)return ret;
    
    return (Result)cmdbuf[1];
}

Result PS_GetLocalFriendCodeSeed(u64* seed)
{
    Result ret = 0;
    u32 *cmdbuf = getThreadCommandBuffer();
    
    cmdbuf[0] = 0x000A0000;
    
    if((ret = svcSendSyncRequest(psHandle))!=0)return ret;

    *seed = (u64)cmdbuf[2] | (u64)cmdbuf[3] << 32;
    
    return (Result)cmdbuf[1];
}

Result PS_GetDeviceId(u32* device_id)
{
    Result ret = 0;
    u32 *cmdbuf = getThreadCommandBuffer();
    
    cmdbuf[0] = 0x000B0000;
    
    if((ret = svcSendSyncRequest(psHandle))!=0)return ret;

    *device_id = cmdbuf[2];
    
    return (Result)cmdbuf[1];
}