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Merge pull request #33 from R-YaTian/seed_fix

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Further fix for seed crypto things
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Nishijima Akito 2025-04-08 11:49:30 +02:00 committed by GitHub
commit 17a0143af4
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GPG Key ID: B5690EEEBB952194
1 changed files with 3 additions and 3 deletions
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6
decrypt.py
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@ -49,7 +49,7 @@ class NcchHdr(Structure):
("makerCode", c_uint16),
("formatVersion", c_uint8),
("formatVersion2", c_uint8),
("seedcheck", c_char * 4),
("seedcheck", c_uint8 * 4),
("programId", c_uint8 * 8),
("padding1", c_uint8 * 16),
("logoHash", c_uint8 * 32),
@ -349,7 +349,7 @@ def parseNCCH(fh, fsize, offs=0, idx=0, contentId=0, titleId="", standAlone=1, f
fixedCrypto = 0
encrypted = 1
if header.flags[7] & 1:
fixedCrypto = 2 if header.titleId[3] & 16 else 1
fixedCrypto = 2 if bytearray(header.titleId[::-1])[3] & 16 else 1
print((tab + "Uses fixed-key crypto"))
if header.flags[7] & 4:
encrypted = 0
@ -357,7 +357,7 @@ def parseNCCH(fh, fsize, offs=0, idx=0, contentId=0, titleId="", standAlone=1, f
useSeedCrypto = header.flags[7] & 32 != 0
keyY = ncchKeyY
if useSeedCrypto:
keyY = getNewkeyY(ncchKeyY, header, hexlify(titleId))
keyY = getNewkeyY(ncchKeyY, header, hexlify(unhexlify(titleId)))
print((tab + "Uses 9.6 NCCH Seed crypto with KeyY: %032X" % keyY))
print("")
base = os.path.splitext(os.path.basename(fh.name))[0]