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Secure boot v2 image format: CRC size

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The CRC size is documented as 1095 bytes, but in the code I find 1196 bytes:
https://github.com/espressif/esp-idf/blob/master/components/bootloader_support/src/secure_boot_v2/secure_boot.c#L35
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Stefan Wallentowitz
2022-05-30 23:30:34 +02:00
committed by GitHub
parent 73be74fd71
commit dd7aece4bf
1 changed files with 2 additions and 2 deletions
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4
docs/en/security/secure-boot-v2.rst
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@@ -153,7 +153,7 @@ The content of each signature block is shown in the following table:
- RSA-PSS Signature result (section 8.1.1 of RFC8017) of image content, computed using following PSS parameters: SHA256 hash, MFG1 function, salt length 32 bytes, default trailer field (0xBC). - RSA-PSS Signature result (section 8.1.1 of RFC8017) of image content, computed using following PSS parameters: SHA256 hash, MFG1 function, salt length 32 bytes, default trailer field (0xBC).
* - 1196 * - 1196
- 4 - 4
- CRC32 of the preceding 1095 bytes. - CRC32 of the preceding 1196 bytes.
* - 1200 * - 1200
- 16 - 16
- Zero padding to length 1216 bytes. - Zero padding to length 1216 bytes.
@@ -197,7 +197,7 @@ The content of each signature block is shown in the following table:
- Reserved. - Reserved.
* - 1196 * - 1196
- 4 - 4
- CRC32 of the preceding 1095 bytes. - CRC32 of the preceding 1196 bytes.
* - 1200 * - 1200
- 16 - 16
- Zero padding to length 1216 bytes. - Zero padding to length 1216 bytes.