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Simplify package1_get_encrypted_package1
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parent
34a658ce4c
commit
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1 changed files with 5 additions and 11 deletions
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@ -86,25 +86,20 @@ size_t package1_get_tsec_fw(void **tsec_fw, const void *package1loader, size_t p
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}
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size_t package1_get_encrypted_package1(package1_header_t **package1, uint8_t *ctr, const void *package1loader, size_t package1loader_size) {
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const uint32_t *pos;
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uintptr_t pk1l = (uintptr_t)package1loader;
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const uint8_t *crypt_hdr = (const uint8_t *)package1loader + 0x4000 - 0x20;
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if (package1loader_size < 0x4000) {
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return 0; /* Shouldn't happen, ever. */
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}
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for (pos = (const uint32_t *)pk1l; (uintptr_t)pos < pk1l + 0x3FF8 && (pos[0] != 0x70012000 || pos[2] != 0x40007000); pos++);
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pos = (const uint32_t *)(pk1l + pos[1] - 0x40010000);
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memcpy(ctr, pos + 4, 0x10);
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(*package1) = (package1_header_t *)(pos + 8);
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return *pos;
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memcpy(ctr, crypt_hdr + 0x10, 0x10);
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(*package1) = (package1_header_t *)(crypt_hdr + 0x20);
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return *(uint32_t *)crypt_hdr;
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}
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bool package1_decrypt(package1_header_t *package1, size_t package1_size, const uint8_t *ctr) {
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uint8_t __attribute__((aligned(16))) ctrbuf[16];
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memcpy(ctrbuf, ctr, 16);
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se_aes_ctr_crypt(0xB, package1, package1_size, package1, package1_size, ctr, 16);
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se_aes_ctr_crypt(0xB, package1, package1_size, package1, package1_size, ctrbuf, 16);
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return memcmp(package1->magic, "PK11", 4) == 0;
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}
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@ -119,7 +114,6 @@ void *package1_get_warmboot_fw(const package1_header_t *package1) {
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Nx-bootloader seems to always start by 0xE328F0C0 (msr cpsr_f, 0xc0).
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*/
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const uint32_t *data = (const uint32_t *)package1->data;
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for (size_t i = 0; i < 3; i++) {
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switch (*data) {
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case 0xD5034FDFu:
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