mirror of
https://github.com/DarkStore-3DS/Project_CTR.git
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3DSGuy
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
#include "lib.h"
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#include "cia.h"
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#include "tik.h"
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// Private Prototypes
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int SetupTicketBuffer(buffer_struct *tik);
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int SetupTicketHeader(tik_hdr *hdr, cia_settings *ciaset);
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int SignTicketHeader(tik_hdr *hdr, tik_signature *sig, keys_struct *keys);
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void SetLimits(tik_hdr *hdr, cia_settings *ciaset);
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void SetContentIndexData(tik_hdr *hdr, cia_settings *ciaset);
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int BuildTicket(cia_settings *ciaset)
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{
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int result = 0;
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result = SetupTicketBuffer(&ciaset->ciaSections.tik);
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if(result) return result;
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// Setting Ticket Struct Ptrs
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tik_signature *sig = (tik_signature*)ciaset->ciaSections.tik.buffer;
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tik_hdr *hdr = (tik_hdr*)(ciaset->ciaSections.tik.buffer+sizeof(tik_signature));
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result = SetupTicketHeader(hdr,ciaset);
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if(result) return result;
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result = SignTicketHeader(hdr,sig,ciaset->keys);
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return 0;
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}
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int SetupTicketBuffer(buffer_struct *tik)
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{
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tik->size = sizeof(tik_signature) + sizeof(tik_hdr);
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tik->buffer = calloc(1,tik->size);
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if(!tik->buffer) {
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fprintf(stderr,"[TIK ERROR] Not enough memory\n");
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return MEM_ERROR;
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}
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return 0;
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}
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int SetupTicketHeader(tik_hdr *hdr, cia_settings *ciaset)
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{
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memset(hdr,0,sizeof(tik_hdr));
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memcpy(hdr->issuer,ciaset->tik.issuer,0x40);
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hdr->formatVersion = ciaset->tik.formatVersion;
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hdr->caCrlVersion = ciaset->cert.caCrlVersion;
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hdr->signerCrlVersion = ciaset->cert.signerCrlVersion;
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if(ciaset->content.encryptCia)
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CryptTitleKey(hdr->encryptedTitleKey, ciaset->common.titleKey,ciaset->common.titleId,ciaset->keys,ENC);
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else{
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u64_to_u8(hdr->encryptedTitleKey,u64GetRand(),BE);
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u64_to_u8((hdr->encryptedTitleKey+8),u64GetRand(),BE);
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}
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memcpy(hdr->ticketId,ciaset->tik.ticketId,8);
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memcpy(hdr->deviceId,ciaset->tik.deviceId,8);
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memcpy(hdr->titleId,ciaset->common.titleId,8);
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u16_to_u8(hdr->ticketVersion,ciaset->tik.version,BE);
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hdr->licenceType = ciaset->tik.licenceType;
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hdr->keyId = ciaset->keys->aes.currentCommonKey;
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memcpy(hdr->eshopAccId,ciaset->tik.eshopAccId,4);
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hdr->audit = ciaset->tik.audit;
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SetLimits(hdr,ciaset);
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SetContentIndexData(hdr,ciaset);
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return 0;
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}
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int SignTicketHeader(tik_hdr *hdr, tik_signature *sig, keys_struct *keys)
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{
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memset(sig,0,sizeof(tik_signature));
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u32_to_u8(sig->sigType,RSA_2048_SHA256,BE);
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return ctr_sig((u8*)hdr,sizeof(tik_hdr),sig->data,keys->rsa.xsPub,keys->rsa.xsPvt,RSA_2048_SHA256,CTR_RSA_SIGN);
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}
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int CryptTitleKey(u8 *EncTitleKey, u8 *DecTitleKey, u8 *TitleID, keys_struct *keys, u8 mode)
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{
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//Generating IV
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u8 iv[16];
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memset(&iv,0x0,16);
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memcpy(iv,TitleID,0x8);
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//Setting up Aes Context
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ctr_aes_context ctx;
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memset(&ctx,0x0,sizeof(ctr_aes_context));
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//Crypting TitleKey
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ctr_init_aes_cbc(&ctx,keys->aes.commonKey[keys->aes.currentCommonKey],iv,mode);
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if(mode == ENC) ctr_aes_cbc(&ctx,DecTitleKey,EncTitleKey,0x10,ENC);
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else ctr_aes_cbc(&ctx,EncTitleKey,DecTitleKey,0x10,DEC);
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// Return
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return 0;
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}
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void SetLimits(tik_hdr *hdr, cia_settings *ciaset)
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{
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memset(hdr->limits,0,0x40);
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}
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void SetContentIndexData(tik_hdr *hdr, cia_settings *ciaset)
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{
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memset(hdr->contentIndex,0,0xAC);
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memcpy(hdr->contentIndex,default_contentIndex,0x30);
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}
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