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core/headertool: support generating vendor headers with explicit size

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This commit is contained in:
matejcik
2020-02-05 12:23:34 +01:00
parent 3c7806aaf6
commit d28e33ef02
4 changed files with 30 additions and 9 deletions
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15
python/src/trezorlib/firmware.py
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@@ -146,7 +146,7 @@ VendorTrust = c.Transformed(c.BitStruct(
VendorHeader = c.Struct(
"_start_offset" / c.Tell,
"magic" / c.Const(b"TRZV"),
"_header_len" / c.Padding(4),
"header_len" / c.Int32ul,
"expiry" / c.Int32ul,
"version" / c.Struct(
"major" / c.Int8ul,
@@ -159,17 +159,14 @@ VendorHeader = c.Struct(
"pubkeys" / c.Bytes(32)[c.this.sig_n],
"text" / c.Aligned(4, c.PascalString(c.Int8ul, "utf-8")),
"image" / Toif,
"_data_end_offset" / c.Tell,
"_end_offset" / c.Tell,
c.Padding(-(c.this._data_end_offset + 65) % 512),
"_min_header_len" / c.Check(c.this.header_len > (c.this._end_offset - c.this._start_offset) + 65),
"_header_len_aligned" / c.Check(c.this.header_len % 512 == 0),
c.Padding(c.this.header_len - c.this._end_offset + c.this._start_offset - 65),
"sigmask" / c.Byte,
"signature" / c.Bytes(64),
"_end_offset" / c.Tell,
"header_len" / c.Pointer(
c.this._start_offset + 4,
c.Rebuild(c.Int32ul, c.this._end_offset - c.this._start_offset)
),
)