int sce_decrypt_header(u8 *ptr, struct keylist *klist)
{
u32 meta_offset;
u32 meta_len;
u64 header_len;
u32 i, j;
u8 tmp[0x40];
int success = 0;
meta_offset = be32(ptr + 0x0c);
header_len = be64(ptr + 0x10);
for (i = 0; i < klist->n; i++) {
aes256cbc(klist->keys[i].key,
klist->keys[i].iv,
ptr + meta_offset + 0x20,
0x40,
tmp);
success = 1;
for (j = 0x10; j < (0x10 + 0x10); j++)
if (tmp[j] != 0)
success = 0;
for (j = 0x30; j < (0x30 + 0x10); j++)
if (tmp[j] != 0)
success = 0;
if (success == 1) {
memcpy(ptr + meta_offset + 0x20, tmp, 0x40);
break;
}
}
if (success != 1)
return -1;
printf(" Metadata key id: %s\n", klist->keys[i].id);
memcpy(tmp, ptr + meta_offset + 0x40, 0x10);
aes128ctr(ptr + meta_offset + 0x20,
tmp,
ptr + meta_offset + 0x60,
0x20,
ptr + meta_offset + 0x60);
meta_len = header_len - meta_offset;
aes128ctr(ptr + meta_offset + 0x20,
tmp,
ptr + meta_offset + 0x80,
meta_len - 0x80,
ptr + meta_offset + 0x80);
return i;
}
static int
decrypt_metadata(uint8_t *metadata, uint32_t metadata_size,
struct keylist *klist)
{
uint32_t i;
METADATA_INFO metadata_info;
uint8_t zero[16] = {0};
for (i = 0; i < klist->n; i++) {
aes256cbc(klist->keys[i].key, klist->keys[i].iv,
metadata, sizeof(METADATA_INFO), (uint8_t *) &metadata_info);
if (memcmp (metadata_info.key_pad, zero, 16) == 0 &&
memcmp (metadata_info.iv_pad, zero, 16) == 0) {
memcpy(metadata, &metadata_info, sizeof(METADATA_INFO));
break;
}
}
if (i >= klist->n)
return -1;
aes128ctr(metadata_info.key, metadata_info.iv,
metadata + sizeof(METADATA_INFO),
metadata_size - sizeof(METADATA_INFO),
metadata + sizeof(METADATA_INFO));
return i;
}
int sce_encrypt_header(u8 *ptr, struct key *k)
{
u32 meta_offset;
u32 meta_len;
u64 header_len;
u8 iv[16];
meta_offset = be32(ptr + 0x0c);
header_len = be64(ptr + 0x10);
meta_len = header_len - meta_offset;
memcpy(iv, ptr + meta_offset + 0x40, 0x10);
aes128ctr(ptr + meta_offset + 0x20,
iv,
ptr + meta_offset + 0x60,
meta_len - 0x60,
ptr + meta_offset + 0x60);
aes256cbc_enc(k->key, k->iv,
ptr + meta_offset + 0x20,
0x40,
ptr + meta_offset + 0x20);
return 0;
}
static void
paged_file_crypt_internal_decrypt (PagedFile *f)
{
if (f->size - f->pos > 0) {
if (f->crypt == PAGED_FILE_CRYPT_AES_128_CBC) {
u8 iv[0x10];
memcpy (iv, f->iv, 0x10);
if ((f->size - f->pos) >= 0x10)
memcpy (f->iv, f->ptr + f->size - 0x10, 0x10);
aes128cbc (f->key, iv, f->ptr + f->pos, f->size - f->pos,
f->ptr + f->pos);
} else if (f->crypt == PAGED_FILE_CRYPT_AES_256_CBC) {
u8 iv[0x10];
memcpy (iv, f->iv, 0x10);
if ((f->size - f->pos) >= 0x10)
memcpy (f->iv, f->ptr + f->size - 0x10, 0x10);
aes256cbc (f->key, iv, f->ptr + f->pos, f->size - f->pos, f->ptr + f->pos);
} else if (f->crypt == PAGED_FILE_CRYPT_AES_128_CTR) {
aes128ctr (f->key, f->iv, f->ptr + f->pos, f->size - f->pos, f->ptr + f->pos);
} else if (f->crypt == PAGED_FILE_CRYPT_CUSTOM) {
f->crypt_cb (f, PAGED_FILE_CRYPT_DECRYPT, f->ptr + f->pos,
f->size - f->pos, f->crypt_cb_data);
}
}
}
static void decrypt_retail_pkg(void)
{
u8 key[0x10];
u8 iv[0x10];
if (be16(pkg + 0x06) != 1)
fail("invalid pkg type: %x", be16(pkg + 0x06));
if (key_get_simple("gpkg-key", key, 0x10) < 0)
fail("failed to load the package key.");
memcpy(iv, pkg + 0x70, 0x10);
aes128ctr(key, iv, pkg + offset, size, pkg + offset);
}
static void
paged_file_crypt_internal_encrypt (PagedFile *f)
{
if (f->size > 0) {
if (f->crypt == PAGED_FILE_CRYPT_AES_128_CBC) {
aes128cbc_enc (f->key, f->iv, f->ptr, f->size, f->ptr);
if (f->size >= 0x10)
memcpy (f->iv, f->ptr + f->size - 0x10, 0x10);
} else if (f->crypt == PAGED_FILE_CRYPT_AES_256_CBC) {
aes256cbc_enc (f->key, f->iv, f->ptr, f->size, f->ptr);
if (f->size >= 0x10)
memcpy (f->iv, f->ptr + f->size - 0x10, 0x10);
} else if (f->crypt == PAGED_FILE_CRYPT_AES_128_CTR) {
aes128ctr (f->key, f->iv, f->ptr, f->size, f->ptr);
} else if (f->crypt == PAGED_FILE_CRYPT_CUSTOM) {
f->crypt_cb (f, PAGED_FILE_CRYPT_ENCRYPT, f->ptr, f->size,
f->crypt_cb_data);
}
}
}
int sce_decrypt_data(u8 *ptr)
{
u64 meta_offset;
u32 meta_len;
u32 meta_n_hdr;
u64 header_len;
u32 i;
u64 offset;
u64 size;
u32 keyid;
u32 ivid;
u8 *tmp;
u8 iv[16];
meta_offset = be32(ptr + 0x0c);
header_len = be64(ptr + 0x10);
meta_len = header_len - meta_offset;
meta_n_hdr = be32(ptr + meta_offset + 0x60 + 0xc);
for (i = 0; i < meta_n_hdr; i++) {
tmp = ptr + meta_offset + 0x80 + 0x30*i;
offset = be64(tmp);
size = be64(tmp + 8);
keyid = be32(tmp + 0x24);
ivid = be32(tmp + 0x28);
if (keyid == 0xffffffff || ivid == 0xffffffff)
continue;
memcpy(iv, ptr + meta_offset + 0x80 + 0x30 * meta_n_hdr + ivid * 0x10, 0x10);
aes128ctr(ptr + meta_offset + 0x80 + 0x30 * meta_n_hdr + keyid * 0x10,
iv,
ptr + offset,
size,
ptr + offset);
}
return 0;
}
int main(int argc, char* argv[]) {
int i;
u8 ecount_buf[0x10], iv[0x10];
size_t countp;
int num;
if(argc < 4) {
printf("usage: %s input.elf output.self keytype keysuffix\n", argv[0]);
return -1;
}
Elf64_Ehdr input_elf_header;
FILE *input_elf_file = fopen(argv[1], "rb");
fseek(input_elf_file, 0, SEEK_END);
int nlen = ftell(input_elf_file);
fseek(input_elf_file, 0, SEEK_SET);
input_elf_data = (u8*)malloc(nlen);
fread(input_elf_data, 1, nlen, input_elf_file);
fclose(input_elf_file);
memcpy(&input_elf_header, input_elf_data, sizeof(input_elf_header));
FILE *output_self_file = fopen(argv[2], "wb");
printf("ELF header size @ %x\n", get_u16(&(input_elf_header.e_ehsize)) );
printf("%d program headers @ %64llX\n", get_u16(&(input_elf_header.e_phnum)), get_u64(&(input_elf_header.e_phoff)));
printf("%d section headers @ %64llX\n", get_u16(&(input_elf_header.e_shnum)), get_u64(&(input_elf_header.e_shoff)));
Self_Shdr output_self_header; memset(&output_self_header, 0, sizeof(output_self_header));
Self_Ehdr output_extended_self_header; memset(&output_extended_self_header, 0, sizeof(output_extended_self_header));
Self_Ihdr output_self_info_header; memset(&output_self_info_header, 0, sizeof(output_self_info_header));
set_u32(&(output_self_header.s_magic), 0x53434500);
set_u32(&(output_self_header.s_hdrversion), 2);
set_u16(&(output_self_header.s_flags), 1);
set_u16(&(output_self_header.s_hdrtype), 1);
// header size and file size aren't known yet
set_u64(&(output_extended_self_header.e_magic), 3);
set_u64(&(output_extended_self_header.e_ihoff), sizeof(Self_Shdr)+sizeof(Self_Ehdr));
set_u64(&(output_extended_self_header.e_ehoff), sizeof(Self_Shdr)+sizeof(Self_Ehdr)+sizeof(Self_Ihdr));
set_u64(&(output_extended_self_header.e_phoff), sizeof(Self_Shdr)+sizeof(Self_Ehdr)+sizeof(Self_Ihdr)+get_u64(&(input_elf_header.e_phoff)));
// section header offset unknown
set_u64(&(output_self_info_header.i_authid), 0x1070000500000001LL);
set_u32(&(output_self_info_header.i_magic), 0x01000002);
set_u32(&(output_self_info_header.i_apptype), 4);
set_u64(&(output_self_info_header.i_version), 0x0003000000000000LL);
// set static data
int phnum = get_u16(&(input_elf_header.e_phnum));
u32 phsize = (sizeof(Elf64_Phdr)*get_u16(&(input_elf_header.e_phnum)));
Self_SDKversion sdkversion;
Self_Cflags cflags;
memcpy(&sdkversion, sdkversion_static, sizeof(Self_SDKversion));
memcpy(&cflags, cflags_static, sizeof(Self_Cflags));
int running_size = (sizeof(output_self_header)+sizeof(output_extended_self_header)+sizeof(output_self_info_header)+sizeof(input_elf_header)+phsize+0xF)&0xFFFFFFF0;
set_u64(&(output_extended_self_header.e_pmoff), running_size); running_size += phnum*sizeof(Self_PMhdr);
set_u64(&(output_extended_self_header.e_svoff), running_size); running_size += sizeof(Self_SDKversion);
set_u64(&(output_extended_self_header.e_cfoff), running_size); running_size += sizeof(Self_Cflags);
set_u64(&(output_extended_self_header.e_cfsize), sizeof(Self_Cflags));
set_u32(&(output_self_header.s_esize), running_size - sizeof(output_self_header));
printf("running size is %X\n", running_size);
int maxsection = 6;
running_size += sizeof(metadata_crypt_header)+sizeof(segment_certification_header)+maxsection*(sizeof(segment_certification_segment)+sizeof(segment_certification_crypt_encrypted))+sizeof(segment_certification_sign)+sizeof(nubpadding_static);
printf("running size is %X\n", running_size);
set_u64(&(output_self_header.s_shsize), running_size);
// init randomness
gmp_randstate_t r_state;
gmp_randinit_default(r_state);
gmp_randseed_ui(r_state, time(NULL));
// loop through the sections
segment_certification_header segment_header; memset(&segment_header, 0, sizeof(segment_header));
Self_Section first_section;
Self_Section* section_ptr = &first_section;
set_u64(&(segment_header.signature_offset), running_size-sizeof(segment_certification_sign));
set_u32(&(segment_header.unknown1), 1);
set_u32(&(segment_header.segment_count), phnum);
set_u32(&(segment_header.crypt_len), (phnum*sizeof(segment_certification_crypt_encrypted))/0x10);
Elf64_Phdr* elf_segment = (Elf64_Phdr*)(&input_elf_data[get_u64(&(input_elf_header.e_phoff))]);
for(i=0;i<phnum;i++) {
memset(section_ptr, 0, sizeof(Self_Section));
//set_u64(&(section_ptr->enc_segment.segment_offset), get_u64(&(elf_segment->p_vaddr)));
set_u64(&(section_ptr->enc_segment.segment_offset), running_size);
set_u64(&(section_ptr->enc_segment.segment_size), get_u64(&(elf_segment->p_filesz)));
set_u32(&(section_ptr->enc_segment.segment_crypt_flag), 2);
set_u32(&(section_ptr->enc_segment.segment_sha1_index), i*8);
set_u32(&(section_ptr->enc_segment.segment_erk_index), i*8+6);
set_u32(&(section_ptr->enc_segment.segment_riv_index), i*8+7);
set_u32(&(section_ptr->enc_segment.segment_number), i);
set_u32(&(section_ptr->enc_segment.unknown2), 2);
set_u32(&(section_ptr->enc_segment.unknown3), 3);
set_u32(&(section_ptr->enc_segment.unknown4), 2);
set_u64(&(section_ptr->pmhdr.pm_offset), running_size);
set_u64(&(section_ptr->pmhdr.pm_size), get_u64(&(elf_segment->p_filesz)));
set_u32(&(section_ptr->pmhdr.pm_compressed), 1);
set_u32(&(section_ptr->pmhdr.pm_encrypted), 1);
mpz_t riv, erk, hmac;
mpz_init(riv); mpz_init(erk); mpz_init(hmac);
mpz_urandomb(erk, r_state, 128);
mpz_urandomb(riv, r_state, 128);
mpz_urandomb(hmac, r_state, 512);
mpz_export(section_ptr->crypt_segment.erk, &countp, 1, 0x10, 1, 0, erk);
mpz_export(section_ptr->crypt_segment.riv, &countp, 1, 0x10, 1, 0, riv);
mpz_export(section_ptr->crypt_segment.hmac, &countp, 1, 0x40, 1, 0, hmac);
section_ptr->rlen = get_u64(&(elf_segment->p_filesz));
section_ptr->len = ((section_ptr->rlen)+0xF)&0xFFFFFFF0;
section_ptr->data = (u8*)malloc(section_ptr->len);
u32 in_data_offset = get_u64(&(elf_segment->p_offset)); // + get_u16(&(input_elf_header.e_ehsize)) + (sizeof(Elf64_Phdr)*get_u16(&(input_elf_header.e_phnum)));
u8* in_data = &input_elf_data[in_data_offset];
printf("processing segment %d with len %x offset %x\n", i, section_ptr->len, in_data_offset);
//hexdump((u8*)elf_segment, sizeof(Elf64_Phdr));
/*SHA_CTX c;
SHA1_ghetto_init(&c, section_ptr->crypt_segment.hmac);
SHA1_Update(&c, in_data, section_ptr->rlen);
SHA1_ghetto_final(section_ptr->crypt_segment.sha1, &c, section_ptr->crypt_segment.hmac);*/
sha1_hmac(section_ptr->crypt_segment.hmac, in_data, section_ptr->rlen, section_ptr->crypt_segment.sha1);
memset(ecount_buf, 0, 16); num=0;
AES_set_encrypt_key(section_ptr->crypt_segment.erk, 128, &aes_key);
memcpy(iv, section_ptr->crypt_segment.riv, 16);
#ifdef NO_CRYPT
memcpy(section_ptr->data, in_data, section_ptr->len);
#else
//AES_ctr128_encrypt(in_data, section_ptr->data, section_ptr->len, &aes_key, iv, ecount_buf, &num);
aes128ctr((u8*)&aes_key, iv, in_data, section_ptr->len, section_ptr->data);
#endif
running_size += section_ptr->len;
// next
if(i != phnum-1) {
section_ptr->next_section = malloc(sizeof(Self_Section));
}
elf_segment += 1; // 1 is sizeof(Elf64_Phdr)
section_ptr = section_ptr->next_section;
}
printf("segment processing done\n");
// section table offset
set_u64(&(output_extended_self_header.e_shoff), running_size);
// lay out the metadata
u8 metadata[0x2000]; memset(metadata, 0, 0x2000);
u32 metadata_len = 0;
memcpy(&metadata[metadata_len], &output_self_header, sizeof(output_self_header)); metadata_len += sizeof(output_self_header);
memcpy(&metadata[metadata_len], &output_extended_self_header, sizeof(output_extended_self_header)); metadata_len += sizeof(output_extended_self_header);
memcpy(&metadata[metadata_len], &output_self_info_header, sizeof(output_self_info_header)); metadata_len += sizeof(output_self_info_header);
memcpy(&metadata[metadata_len], &input_elf_header, sizeof(input_elf_header)); metadata_len += sizeof(input_elf_header);
memcpy(&metadata[metadata_len], &input_elf_data[get_u64(&(input_elf_header.e_phoff))], phsize); metadata_len += phsize;
metadata_len = (metadata_len+0xF)&0xFFFFFFF0;
section_ptr = &first_section;
while(section_ptr != NULL) {
memcpy(&metadata[metadata_len], &(section_ptr->pmhdr), sizeof(section_ptr->pmhdr)); metadata_len += sizeof(section_ptr->pmhdr);
section_ptr = section_ptr->next_section;
}
memcpy(&metadata[metadata_len], &sdkversion, sizeof(sdkversion)); metadata_len += sizeof(sdkversion);
memcpy(&metadata[metadata_len], &cflags, sizeof(cflags)); metadata_len += sizeof(cflags);
printf("top half of metadata ready\n");
// generate metadata encryption keys
mpz_t bigriv, bigerk;
mpz_init(bigriv); mpz_init(bigerk);
mpz_urandomb(bigerk, r_state, 128);
mpz_urandomb(bigriv, r_state, 128);
metadata_crypt_header md_header;
mpz_export(md_header.erk, &countp, 1, 0x10, 1, 0, bigerk);
mpz_export(md_header.riv, &countp, 1, 0x10, 1, 0, bigriv);
memcpy(&metadata[metadata_len], &md_header, sizeof(md_header)); metadata_len += sizeof(md_header);
memcpy(&metadata[metadata_len], &segment_header, sizeof(segment_header)); metadata_len += sizeof(segment_header);
// copy section data
int csection;
csection = 0;
section_ptr = &first_section;
while(section_ptr != NULL) {
memcpy(&metadata[metadata_len], &(section_ptr->enc_segment), sizeof(section_ptr->enc_segment)); metadata_len += sizeof(section_ptr->enc_segment);
section_ptr = section_ptr->next_section;
if((++csection) == maxsection) break;
}
csection = 0;
section_ptr = &first_section;
while(section_ptr != NULL) {
memcpy(&metadata[metadata_len], &(section_ptr->crypt_segment), sizeof(section_ptr->crypt_segment)); metadata_len += sizeof(section_ptr->crypt_segment);
section_ptr = section_ptr->next_section;
if((++csection) == maxsection) break;
}
// nubpadding time
memcpy(&metadata[metadata_len], nubpadding_static, sizeof(nubpadding_static)); metadata_len += sizeof(nubpadding_static);
// sign shit
u8 digest[0x14];
sha1(metadata, metadata_len, digest);
printf("metadata len is %X\n", metadata_len);
//hexdump(metadata, metadata_len);
//hexdump_nl(digest, 0x14);
segment_certification_sign all_signed;
memset(&all_signed, 0, sizeof(all_signed));
#ifdef GEOHOT_SIGN
mpz_t n,k,da,kinv,r,cs,z;
mpz_init(n); mpz_init(k); mpz_init(da); mpz_init(r); mpz_init(cs); mpz_init(z); mpz_init(kinv);
mpz_import(r, 0x14, 1, 1, 0, 0, appold_R);
mpz_import(n, 0x14, 1, 1, 0, 0, appold_n);
mpz_import(k, 0x14, 1, 1, 0, 0, appold_K);
mpz_import(da, 0x14, 1, 1, 0, 0, appold_Da);
mpz_invert(kinv, k, n);
mpz_import(z, 0x14, 1, 1, 0, 0, digest);
mpz_mul(cs, r, da); mpz_mod(cs, cs, n);
mpz_add(cs, cs, z); mpz_mod(cs, cs, n);
mpz_mul(cs, cs, kinv); mpz_mod(cs, cs, n);
mpz_export(all_signed.R, &countp, 1, 0x14, 1, 0, r);
mpz_export(all_signed.S, &countp, 1, 0x14, 1, 0, cs);
#else
get_keys(argv[3], argv[4]);
//ecdsa_set_curve(appnew_ctype);
//ecdsa_set_pub(appnew_pub);
//ecdsa_set_priv(appnew_priv);
//ecdsa_sign(digest, all_signed.R, all_signed.S);
#endif
memcpy(&metadata[metadata_len], &all_signed, sizeof(all_signed)); metadata_len += sizeof(all_signed);
// encrypt metadata
int metadata_offset = get_u32(&(output_self_header.s_esize)) + sizeof(Self_Shdr);
#ifndef NO_CRYPT
/*memset(ecount_buf, 0, 16); num=0;
AES_set_encrypt_key(&metadata[metadata_offset], 128, &aes_key);
memcpy(iv, &metadata[metadata_offset+0x20], 16);
//AES_ctr128_encrypt(&metadata[0x40+metadata_offset], &metadata[0x40+metadata_offset], metadata_len-metadata_offset-0x40, &aes_key, iv, ecount_buf, &num);
aes128ctr(&metadata[0x20+metadata_offset], &metadata[0x40+metadata_offset], &metadata[0x60+metadata_offset], metadata_len-metadata_offset-0x60, &metadata[0x60+metadata_offset]);
printf("encrypted metadata\n");
//AES_set_encrypt_key(appold_erk, 256, &aes_key);
//memcpy(iv, appold_riv, 16);
AES_set_encrypt_key(appnew_erk, 256, &aes_key);
memcpy(iv, appnew_riv, 16);
//AES_cbc_encrypt(&metadata[metadata_offset], &metadata[metadata_offset], 0x40, &aes_key, iv, AES_ENCRYPT);
aes256cbc_enc(appnew_erk, appnew_riv, &metadata[metadata_offset], 0x40, &metadata[metadata_offset]);
printf("encrypted keys\n");*/
//k.key = appnew_erk;
//k.iv = appnew_riv;
sce_encrypt_header(metadata, &ks);
#endif
// write the output self
fwrite(metadata, 1, metadata_len, output_self_file);
csection = 0;
section_ptr = &first_section;
while(section_ptr != 0) {
printf("writing section with size %X\n", section_ptr->len);
fwrite(section_ptr->data, 1, section_ptr->len, output_self_file);
section_ptr = section_ptr->next_section;
if((++csection) == maxsection) break;
}
fwrite(&input_elf_data[get_u64(&(input_elf_header.e_shoff))], sizeof(Elf64_Shdr), get_u16(&(input_elf_header.e_shnum)), output_self_file);
fclose(output_self_file);
}
int
self_load_sections (FILE *in, SELF *self, ELF *elf, ELF_PHDR **phdr,
METADATA_HEADER *metadata_header, METADATA_SECTION_HEADER **section_headers,
uint8_t **keys, SELF_SECTION **sections)
{
uint32_t num_sections;
uint32_t i;
uint64_t size;
uint32_t elf_size;
METADATA_SECTION_HEADER *hdr;
uint8_t *temp_data;
size = 0;
num_sections = metadata_header->section_count + 1;
*sections = malloc (sizeof(SELF_SECTION) * num_sections);
// ELF header
for (i = 0; i < num_sections; i++) {
if (i == 0) {
hdr = (*section_headers);
elf_size = elf->header_size + (elf->phent_size * elf->phnum);
size = hdr->data_offset - self->header_len;
if (size < elf_size)
size = elf_size;
(*sections)[i].offset = 0;
(*sections)[i].size = size;
(*sections)[i].data = malloc (size);
fseek (in, self->header_len, SEEK_SET);
if (fread ((*sections)[0].data, 1, size, in) != size) {
ERROR (-6, "Couldn't read section header");
}
fseek (in, self->elf_offset, SEEK_SET);
if (fread ((*sections)[0].data, 1, size, in) != size) {
ERROR (-6, "Couldn't read section elf");
}
} else {
hdr = (*section_headers) + i - 1;
if (hdr->type == 2) {
// phdr
size = (*phdr)[hdr->program_idx].segment_size;
(*sections)[i].offset = (*phdr)[hdr->program_idx].offset_in_file;
} else if (hdr->type == 1) {
// shdr
size = (*section_headers)[i-1].data_size;
(*sections)[i].offset = elf->shdr_offset;
} else {
(*sections)[i].offset = UINT64_MAX;
printf("Section %d unkown type: %d. Skipping!\n", i, hdr->type);
}
(*sections)[i].size = size;
(*sections)[i].data = malloc (size);
temp_data = malloc (hdr->data_size);
fseek (in, hdr->data_offset, SEEK_SET);
if (fread (temp_data, 1, hdr->data_size, in) != hdr->data_size) {
ERROR (-6, "Couldn't read section");
}
// if (hdr->encrypted == 3 && self->flags != 0x8000)
if (hdr->encrypted == 3)
aes128ctr(*keys + 0x10 * hdr->key_idx, *keys + 0x10 * hdr->iv_idx,
temp_data, hdr->data_size, temp_data);
if (hdr->compressed == 2)
decompress(temp_data, hdr->data_size, (*sections)[i].data, size);
else
memcpy ((*sections)[i].data, temp_data, size);
free (temp_data);
}
}
return num_sections;
}
int sce_decrypt_header(u8 *ptr, struct keylist *klist)
{
u32 meta_offset;
u32 meta_len;
u64 header_len;
u32 i, j, k;
u8 tmp[0x40];
int success = 0;
meta_offset = be32(ptr + 0x0c);
header_len = be64(ptr + 0x10);
unsigned char *erkptr;
unsigned char *rivptr;
for (i = 0; i < klist->n; i++) {
erkptr = (unsigned char *)&klist->keys[i].key;
rivptr = (unsigned char *)&klist->keys[i].iv;
printf(" ERK: ");
for(k=0;k<32;k++){
printf("\\x");
printf("%2.2X", *erkptr++);
}
printf(" RIV: ");
for(k=0;k<16;k++){
printf("\\x");
printf("%2.2X", *rivptr++);
}
printf(" ID: %u " ,i);
aes256cbc(klist->keys[i].key,
klist->keys[i].iv,
ptr + meta_offset + 0x20,
0x40,
tmp);
success = 1;
for (j = 0x10; j < (0x10 + 0x10); j++)
if (tmp[j] != 0)
success = 0;
for (j = 0x30; j < (0x30 + 0x10); j++)
if (tmp[j] != 0)
success = 0;
if (success == 1) {
memcpy(ptr + meta_offset + 0x20, tmp, 0x40);
printf("...Yep!\n");
break;
}
if (success == 0)
printf("..Nope\n");
else
printf("\n");
}
if (success != 1)
return -1;
memcpy(tmp, ptr + meta_offset + 0x40, 0x10);
aes128ctr(ptr + meta_offset + 0x20,
tmp,
ptr + meta_offset + 0x60,
0x20,
ptr + meta_offset + 0x60);
meta_len = header_len - meta_offset;
aes128ctr(ptr + meta_offset + 0x20,
tmp,
ptr + meta_offset + 0x80,
meta_len - 0x80,
ptr + meta_offset + 0x80);
return i;
}
