upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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779 lines
23 KiB
779 lines
23 KiB
/*
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* (C) Copyright 2018, Linaro Limited
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <avb_verify.h>
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#include <blk.h>
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#include <fastboot.h>
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#include <image.h>
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#include <malloc.h>
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#include <part.h>
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static const unsigned char avb_root_pub[1032] = {
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0x0, 0x0, 0x10, 0x0, 0x55, 0xd9, 0x4, 0xad, 0xd8, 0x4,
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0xaf, 0xe3, 0xd3, 0x84, 0x6c, 0x7e, 0xd, 0x89, 0x3d, 0xc2,
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0x8c, 0xd3, 0x12, 0x55, 0xe9, 0x62, 0xc9, 0xf1, 0xf, 0x5e,
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0xcc, 0x16, 0x72, 0xab, 0x44, 0x7c, 0x2c, 0x65, 0x4a, 0x94,
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0xb5, 0x16, 0x2b, 0x0, 0xbb, 0x6, 0xef, 0x13, 0x7, 0x53,
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|
0x4c, 0xf9, 0x64, 0xb9, 0x28, 0x7a, 0x1b, 0x84, 0x98, 0x88,
|
|
0xd8, 0x67, 0xa4, 0x23, 0xf9, 0xa7, 0x4b, 0xdc, 0x4a, 0xf,
|
|
0xf7, 0x3a, 0x18, 0xae, 0x54, 0xa8, 0x15, 0xfe, 0xb0, 0xad,
|
|
0xac, 0x35, 0xda, 0x3b, 0xad, 0x27, 0xbc, 0xaf, 0xe8, 0xd3,
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|
0x2f, 0x37, 0x34, 0xd6, 0x51, 0x2b, 0x6c, 0x5a, 0x27, 0xd7,
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0x96, 0x6, 0xaf, 0x6b, 0xb8, 0x80, 0xca, 0xfa, 0x30, 0xb4,
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|
0xb1, 0x85, 0xb3, 0x4d, 0xaa, 0xaa, 0xc3, 0x16, 0x34, 0x1a,
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|
0xb8, 0xe7, 0xc7, 0xfa, 0xf9, 0x9, 0x77, 0xab, 0x97, 0x93,
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|
0xeb, 0x44, 0xae, 0xcf, 0x20, 0xbc, 0xf0, 0x80, 0x11, 0xdb,
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0x23, 0xc, 0x47, 0x71, 0xb9, 0x6d, 0xd6, 0x7b, 0x60, 0x47,
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0x87, 0x16, 0x56, 0x93, 0xb7, 0xc2, 0x2a, 0x9a, 0xb0, 0x4c,
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0x1, 0xc, 0x30, 0xd8, 0x93, 0x87, 0xf0, 0xed, 0x6e, 0x8b,
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|
0xbe, 0x30, 0x5b, 0xf6, 0xa6, 0xaf, 0xdd, 0x80, 0x7c, 0x45,
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0x5e, 0x8f, 0x91, 0x93, 0x5e, 0x44, 0xfe, 0xb8, 0x82, 0x7,
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0xee, 0x79, 0xca, 0xbf, 0x31, 0x73, 0x62, 0x58, 0xe3, 0xcd,
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0xc4, 0xbc, 0xc2, 0x11, 0x1d, 0xa1, 0x4a, 0xbf, 0xfe, 0x27,
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0x7d, 0xa1, 0xf6, 0x35, 0xa3, 0x5e, 0xca, 0xdc, 0x57, 0x2f,
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0x3e, 0xf0, 0xc9, 0x5d, 0x86, 0x6a, 0xf8, 0xaf, 0x66, 0xa7,
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0xed, 0xcd, 0xb8, 0xed, 0xa1, 0x5f, 0xba, 0x9b, 0x85, 0x1a,
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0xd5, 0x9, 0xae, 0x94, 0x4e, 0x3b, 0xcf, 0xcb, 0x5c, 0xc9,
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0x79, 0x80, 0xf7, 0xcc, 0xa6, 0x4a, 0xa8, 0x6a, 0xd8, 0xd3,
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0x31, 0x11, 0xf9, 0xf6, 0x2, 0x63, 0x2a, 0x1a, 0x2d, 0xd1,
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0x1a, 0x66, 0x1b, 0x16, 0x41, 0xbd, 0xbd, 0xf7, 0x4d, 0xc0,
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0x4a, 0xe5, 0x27, 0x49, 0x5f, 0x7f, 0x58, 0xe3, 0x27, 0x2d,
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0xe5, 0xc9, 0x66, 0xe, 0x52, 0x38, 0x16, 0x38, 0xfb, 0x16,
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0xeb, 0x53, 0x3f, 0xe6, 0xfd, 0xe9, 0xa2, 0x5e, 0x25, 0x59,
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0xd8, 0x79, 0x45, 0xff, 0x3, 0x4c, 0x26, 0xa2, 0x0, 0x5a,
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0x8e, 0xc2, 0x51, 0xa1, 0x15, 0xf9, 0x7b, 0xf4, 0x5c, 0x81,
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0x9b, 0x18, 0x47, 0x35, 0xd8, 0x2d, 0x5, 0xe9, 0xad, 0xf,
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0x35, 0x74, 0x15, 0xa3, 0x8e, 0x8b, 0xcc, 0x27, 0xda, 0x7c,
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0x5d, 0xe4, 0xfa, 0x4, 0xd3, 0x5, 0xb, 0xba, 0x3a, 0xb2,
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0x49, 0x45, 0x2f, 0x47, 0xc7, 0xd, 0x41, 0x3f, 0x97, 0x80,
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0x4d, 0x3f, 0xc1, 0xb5, 0xbb, 0x70, 0x5f, 0xa7, 0x37, 0xaf,
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0x48, 0x22, 0x12, 0x45, 0x2e, 0xf5, 0xf, 0x87, 0x92, 0xe2,
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0x84, 0x1, 0xf9, 0x12, 0xf, 0x14, 0x15, 0x24, 0xce, 0x89,
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0x99, 0xee, 0xb9, 0xc4, 0x17, 0x70, 0x70, 0x15, 0xea, 0xbe,
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0xc6, 0x6c, 0x1f, 0x62, 0xb3, 0xf4, 0x2d, 0x16, 0x87, 0xfb,
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0x56, 0x1e, 0x45, 0xab, 0xae, 0x32, 0xe4, 0x5e, 0x91, 0xed,
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0x53, 0x66, 0x5e, 0xbd, 0xed, 0xad, 0xe6, 0x12, 0x39, 0xd,
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0x83, 0xc9, 0xe8, 0x6b, 0x6c, 0x2d, 0xa5, 0xee, 0xc4, 0x5a,
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0x66, 0xae, 0x8c, 0x97, 0xd7, 0xd, 0x6c, 0x49, 0xc7, 0xf5,
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0xc4, 0x92, 0x31, 0x8b, 0x9, 0xee, 0x33, 0xda, 0xa9, 0x37,
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0xb6, 0x49, 0x18, 0xf8, 0xe, 0x60, 0x45, 0xc8, 0x33, 0x91,
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0xef, 0x20, 0x57, 0x10, 0xbe, 0x78, 0x2d, 0x83, 0x26, 0xd6,
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0xca, 0x61, 0xf9, 0x2f, 0xe0, 0xbf, 0x5, 0x30, 0x52, 0x5a,
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0x12, 0x1c, 0x0, 0xa7, 0x5d, 0xcc, 0x7c, 0x2e, 0xc5, 0x95,
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0x8b, 0xa3, 0x3b, 0xf0, 0x43, 0x2e, 0x5e, 0xdd, 0x0, 0xdb,
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0xd, 0xb3, 0x37, 0x99, 0xa9, 0xcd, 0x9c, 0xb7, 0x43, 0xf7,
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0x35, 0x44, 0x21, 0xc2, 0x82, 0x71, 0xab, 0x8d, 0xaa, 0xb4,
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0x41, 0x11, 0xec, 0x1e, 0x8d, 0xfc, 0x14, 0x82, 0x92, 0x4e,
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0x83, 0x6a, 0xa, 0x6b, 0x35, 0x5e, 0x5d, 0xe9, 0x5c, 0xcc,
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0x8c, 0xde, 0x39, 0xd1, 0x4a, 0x5b, 0x5f, 0x63, 0xa9, 0x64,
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0xe0, 0xa, 0xcb, 0xb, 0xb8, 0x5a, 0x7c, 0xc3, 0xb, 0xe6,
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0xbe, 0xfe, 0x8b, 0xf, 0x7d, 0x34, 0x8e, 0x2, 0x66, 0x74,
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0x1, 0x6c, 0xca, 0x76, 0xac, 0x7c, 0x67, 0x8, 0x2f, 0x3f,
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0x1a, 0xa6, 0x2c, 0x60, 0xb3, 0xff, 0xda, 0x8d, 0xb8, 0x12,
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0xc, 0x0, 0x7f, 0xcc, 0x50, 0xa1, 0x5c, 0x64, 0xa1, 0xe2,
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0x5f, 0x32, 0x65, 0xc9, 0x9c, 0xbe, 0xd6, 0xa, 0x13, 0x87,
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0x3c, 0x2a, 0x45, 0x47, 0xc, 0xca, 0x42, 0x82, 0xfa, 0x89,
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0x65, 0xe7, 0x89, 0xb4, 0x8f, 0xf7, 0x1e, 0xe6, 0x23, 0xa5,
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0xd0, 0x59, 0x37, 0x79, 0x92, 0xd7, 0xce, 0x3d, 0xfd, 0xe3,
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0xa1, 0xb, 0xcf, 0x6c, 0x85, 0xa0, 0x65, 0xf3, 0x5c, 0xc6,
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0x4a, 0x63, 0x5f, 0x6e, 0x3a, 0x3a, 0x2a, 0x8b, 0x6a, 0xb6,
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0x2f, 0xbb, 0xf8, 0xb2, 0x4b, 0x62, 0xbc, 0x1a, 0x91, 0x25,
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0x66, 0xe3, 0x69, 0xca, 0x60, 0x49, 0xb, 0xf6, 0x8a, 0xbe,
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0x3e, 0x76, 0x53, 0xc2, 0x7a, 0xa8, 0x4, 0x17, 0x75, 0xf1,
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0xf3, 0x3, 0x62, 0x1b, 0x85, 0xb2, 0xb0, 0xef, 0x80, 0x15,
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0xb6, 0xd4, 0x4e, 0xdf, 0x71, 0xac, 0xdb, 0x2a, 0x4, 0xd4,
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0xb4, 0x21, 0xba, 0x65, 0x56, 0x57, 0xe8, 0xfa, 0x84, 0xa2,
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0x7d, 0x13, 0xe, 0xaf, 0xd7, 0x9a, 0x58, 0x2a, 0xa3, 0x81,
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0x84, 0x8d, 0x9, 0xa0, 0x6a, 0xc1, 0xbb, 0xd9, 0xf5, 0x86,
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0xac, 0xbd, 0x75, 0x61, 0x9, 0xe6, 0x8c, 0x3d, 0x77, 0xb2,
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0xed, 0x30, 0x20, 0xe4, 0x0, 0x1d, 0x97, 0xe8, 0xbf, 0xc7,
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0x0, 0x1b, 0x21, 0xb1, 0x16, 0xe7, 0x41, 0x67, 0x2e, 0xec,
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0x38, 0xbc, 0xe5, 0x1b, 0xb4, 0x6, 0x23, 0x31, 0x71, 0x1c,
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0x49, 0xcd, 0x76, 0x4a, 0x76, 0x36, 0x8d, 0xa3, 0x89, 0x8b,
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0x4a, 0x7a, 0xf4, 0x87, 0xc8, 0x15, 0xf, 0x37, 0x39, 0xf6,
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0x6d, 0x80, 0x19, 0xef, 0x5c, 0xa8, 0x66, 0xce, 0x1b, 0x16,
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0x79, 0x21, 0xdf, 0xd7, 0x31, 0x30, 0xc4, 0x21, 0xdd, 0x34,
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0x5b, 0xd2, 0x1a, 0x2b, 0x3e, 0x5d, 0xf7, 0xea, 0xca, 0x5,
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0x8e, 0xb7, 0xcb, 0x49, 0x2e, 0xa0, 0xe3, 0xf4, 0xa7, 0x48,
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0x19, 0x10, 0x9c, 0x4, 0xa7, 0xf4, 0x28, 0x74, 0xc8, 0x6f,
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0x63, 0x20, 0x2b, 0x46, 0x24, 0x26, 0x19, 0x1d, 0xd1, 0x2c,
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0x31, 0x6d, 0x5a, 0x29, 0xa2, 0x6, 0xa6, 0xb2, 0x41, 0xcc,
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0xa, 0x27, 0x96, 0x9, 0x96, 0xac, 0x47, 0x65, 0x78, 0x68,
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0x51, 0x98, 0xd6, 0xd8, 0xa6, 0x2d, 0xa0, 0xcf, 0xec, 0xe2,
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0x74, 0xf2, 0x82, 0xe3, 0x97, 0xd9, 0x7e, 0xd4, 0xf8, 0xb,
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0x70, 0x43, 0x3d, 0xb1, 0x7b, 0x97, 0x80, 0xd6, 0xcb, 0xd7,
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0x19, 0xbc, 0x63, 0xb, 0xfd, 0x4d, 0x88, 0xfe, 0x67, 0xac,
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0xb8, 0xcc, 0x50, 0xb7, 0x68, 0xb3, 0x5b, 0xd6, 0x1e, 0x25,
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0xfc, 0x5f, 0x3c, 0x8d, 0xb1, 0x33, 0x7c, 0xb3, 0x49, 0x1,
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0x3f, 0x71, 0x55, 0xe, 0x51, 0xba, 0x61, 0x26, 0xfa, 0xea,
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0xe5, 0xb5, 0xe8, 0xaa, 0xcf, 0xcd, 0x96, 0x9f, 0xd6, 0xc1,
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0x5f, 0x53, 0x91, 0xad, 0x5, 0xde, 0x20, 0xe7, 0x51, 0xda,
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0x5b, 0x95, 0x67, 0xed, 0xf4, 0xee, 0x42, 0x65, 0x70, 0x13,
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0xb, 0x70, 0x14, 0x1c, 0xc9, 0xe0, 0x19, 0xca, 0x5f, 0xf5,
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0x1d, 0x70, 0x4b, 0x6c, 0x6, 0x74, 0xec, 0xb5, 0x2e, 0x77,
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0xe1, 0x74, 0xa1, 0xa3, 0x99, 0xa0, 0x85, 0x9e, 0xf1, 0xac,
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0xd8, 0x7e,
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};
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/**
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* ============================================================================
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* Boot states support (GREEN, YELLOW, ORANGE, RED) and dm_verity
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* ============================================================================
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*/
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char *avb_set_state(AvbOps *ops, enum avb_boot_state boot_state)
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{
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struct AvbOpsData *data;
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char *cmdline = NULL;
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if (!ops)
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return NULL;
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data = (struct AvbOpsData *)ops->user_data;
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if (!data)
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return NULL;
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data->boot_state = boot_state;
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switch (boot_state) {
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case AVB_GREEN:
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cmdline = "androidboot.verifiedbootstate=green";
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break;
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case AVB_YELLOW:
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cmdline = "androidboot.verifiedbootstate=yellow";
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break;
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case AVB_ORANGE:
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cmdline = "androidboot.verifiedbootstate=orange";
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case AVB_RED:
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break;
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}
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return cmdline;
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}
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char *append_cmd_line(char *cmdline_orig, char *cmdline_new)
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{
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char *cmd_line;
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if (!cmdline_new)
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return cmdline_orig;
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if (cmdline_orig)
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cmd_line = cmdline_orig;
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else
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cmd_line = " ";
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cmd_line = avb_strdupv(cmd_line, " ", cmdline_new, NULL);
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return cmd_line;
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}
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static int avb_find_dm_args(char **args, char *str)
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{
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int i;
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if (!str)
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return -1;
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for (i = 0; i < AVB_MAX_ARGS && args[i]; ++i) {
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if (strstr(args[i], str))
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return i;
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}
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return -1;
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}
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static char *avb_set_enforce_option(const char *cmdline, const char *option)
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{
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char *cmdarg[AVB_MAX_ARGS];
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char *newargs = NULL;
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int i = 0;
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int total_args;
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memset(cmdarg, 0, sizeof(cmdarg));
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cmdarg[i++] = strtok((char *)cmdline, " ");
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do {
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cmdarg[i] = strtok(NULL, " ");
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if (!cmdarg[i])
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break;
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if (++i >= AVB_MAX_ARGS) {
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printf("%s: Can't handle more then %d args\n",
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__func__, i);
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return NULL;
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}
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} while (true);
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total_args = i;
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i = avb_find_dm_args(&cmdarg[0], VERITY_TABLE_OPT_LOGGING);
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if (i >= 0) {
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cmdarg[i] = (char *)option;
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} else {
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i = avb_find_dm_args(&cmdarg[0], VERITY_TABLE_OPT_RESTART);
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if (i < 0) {
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printf("%s: No verity options found\n", __func__);
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return NULL;
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}
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cmdarg[i] = (char *)option;
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}
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for (i = 0; i <= total_args; i++)
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newargs = append_cmd_line(newargs, cmdarg[i]);
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return newargs;
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}
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char *avb_set_ignore_corruption(const char *cmdline)
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{
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char *newargs = NULL;
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newargs = avb_set_enforce_option(cmdline, VERITY_TABLE_OPT_LOGGING);
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if (newargs)
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newargs = append_cmd_line(newargs,
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"androidboot.veritymode=eio");
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return newargs;
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}
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char *avb_set_enforce_verity(const char *cmdline)
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{
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char *newargs;
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newargs = avb_set_enforce_option(cmdline, VERITY_TABLE_OPT_RESTART);
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if (newargs)
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newargs = append_cmd_line(newargs,
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"androidboot.veritymode=enforcing");
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return newargs;
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}
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/**
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* ============================================================================
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* IO(mmc) auxiliary functions
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* ============================================================================
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*/
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static unsigned long mmc_read_and_flush(struct mmc_part *part,
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lbaint_t start,
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lbaint_t sectors,
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void *buffer)
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{
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unsigned long blks;
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void *tmp_buf;
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size_t buf_size;
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bool unaligned = is_buf_unaligned(buffer);
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if (start < part->info.start) {
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printf("%s: partition start out of bounds\n", __func__);
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return 0;
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}
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if ((start + sectors) > (part->info.start + part->info.size)) {
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sectors = part->info.start + part->info.size - start;
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printf("%s: read sector aligned to partition bounds (%ld)\n",
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__func__, sectors);
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}
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/*
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* Reading fails on unaligned buffers, so we have to
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* use aligned temporary buffer and then copy to destination
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*/
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if (unaligned) {
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printf("Handling unaligned read buffer..\n");
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tmp_buf = get_sector_buf();
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buf_size = get_sector_buf_size();
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if (sectors > buf_size / part->info.blksz)
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sectors = buf_size / part->info.blksz;
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} else {
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tmp_buf = buffer;
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}
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blks = blk_dread(part->mmc_blk,
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start, sectors, tmp_buf);
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/* flush cache after read */
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flush_cache((ulong)tmp_buf, sectors * part->info.blksz);
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if (unaligned)
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memcpy(buffer, tmp_buf, sectors * part->info.blksz);
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return blks;
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}
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static unsigned long mmc_write(struct mmc_part *part, lbaint_t start,
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lbaint_t sectors, void *buffer)
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{
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void *tmp_buf;
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size_t buf_size;
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bool unaligned = is_buf_unaligned(buffer);
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|
if (start < part->info.start) {
|
|
printf("%s: partition start out of bounds\n", __func__);
|
|
return 0;
|
|
}
|
|
if ((start + sectors) > (part->info.start + part->info.size)) {
|
|
sectors = part->info.start + part->info.size - start;
|
|
printf("%s: sector aligned to partition bounds (%ld)\n",
|
|
__func__, sectors);
|
|
}
|
|
if (unaligned) {
|
|
tmp_buf = get_sector_buf();
|
|
buf_size = get_sector_buf_size();
|
|
printf("Handling unaligned wrire buffer..\n");
|
|
if (sectors > buf_size / part->info.blksz)
|
|
sectors = buf_size / part->info.blksz;
|
|
|
|
memcpy(tmp_buf, buffer, sectors * part->info.blksz);
|
|
} else {
|
|
tmp_buf = buffer;
|
|
}
|
|
|
|
return blk_dwrite(part->mmc_blk,
|
|
start, sectors, tmp_buf);
|
|
}
|
|
|
|
static struct mmc_part *get_partition(AvbOps *ops, const char *partition)
|
|
{
|
|
int ret;
|
|
u8 dev_num;
|
|
int part_num = 0;
|
|
struct mmc_part *part;
|
|
struct blk_desc *mmc_blk;
|
|
|
|
part = malloc(sizeof(struct mmc_part));
|
|
if (!part)
|
|
return NULL;
|
|
|
|
dev_num = get_boot_device(ops);
|
|
part->mmc = find_mmc_device(dev_num);
|
|
if (!part->mmc) {
|
|
printf("No MMC device at slot %x\n", dev_num);
|
|
goto err;
|
|
}
|
|
|
|
if (mmc_init(part->mmc)) {
|
|
printf("MMC initialization failed\n");
|
|
goto err;
|
|
}
|
|
|
|
ret = mmc_switch_part(part->mmc, part_num);
|
|
if (ret)
|
|
goto err;
|
|
|
|
mmc_blk = mmc_get_blk_desc(part->mmc);
|
|
if (!mmc_blk) {
|
|
printf("Error - failed to obtain block descriptor\n");
|
|
goto err;
|
|
}
|
|
|
|
ret = part_get_info_by_name(mmc_blk, partition, &part->info);
|
|
if (!ret) {
|
|
printf("Can't find partition '%s'\n", partition);
|
|
goto err;
|
|
}
|
|
|
|
part->dev_num = dev_num;
|
|
part->mmc_blk = mmc_blk;
|
|
|
|
return part;
|
|
err:
|
|
free(part);
|
|
return NULL;
|
|
}
|
|
|
|
static AvbIOResult mmc_byte_io(AvbOps *ops,
|
|
const char *partition,
|
|
s64 offset,
|
|
size_t num_bytes,
|
|
void *buffer,
|
|
size_t *out_num_read,
|
|
enum mmc_io_type io_type)
|
|
{
|
|
ulong ret;
|
|
struct mmc_part *part;
|
|
u64 start_offset, start_sector, sectors, residue;
|
|
u8 *tmp_buf;
|
|
size_t io_cnt = 0;
|
|
|
|
if (!partition || !buffer || io_type > IO_WRITE)
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
|
|
part = get_partition(ops, partition);
|
|
if (!part)
|
|
return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION;
|
|
|
|
if (!part->info.blksz)
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
|
|
start_offset = calc_offset(part, offset);
|
|
while (num_bytes) {
|
|
start_sector = start_offset / part->info.blksz;
|
|
sectors = num_bytes / part->info.blksz;
|
|
/* handle non block-aligned reads */
|
|
if (start_offset % part->info.blksz ||
|
|
num_bytes < part->info.blksz) {
|
|
tmp_buf = get_sector_buf();
|
|
if (start_offset % part->info.blksz) {
|
|
residue = part->info.blksz -
|
|
(start_offset % part->info.blksz);
|
|
if (residue > num_bytes)
|
|
residue = num_bytes;
|
|
} else {
|
|
residue = num_bytes;
|
|
}
|
|
|
|
if (io_type == IO_READ) {
|
|
ret = mmc_read_and_flush(part,
|
|
part->info.start +
|
|
start_sector,
|
|
1, tmp_buf);
|
|
|
|
if (ret != 1) {
|
|
printf("%s: read error (%ld, %lld)\n",
|
|
__func__, ret, start_sector);
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
}
|
|
/*
|
|
* if this is not aligned at sector start,
|
|
* we have to adjust the tmp buffer
|
|
*/
|
|
tmp_buf += (start_offset % part->info.blksz);
|
|
memcpy(buffer, (void *)tmp_buf, residue);
|
|
} else {
|
|
ret = mmc_read_and_flush(part,
|
|
part->info.start +
|
|
start_sector,
|
|
1, tmp_buf);
|
|
|
|
if (ret != 1) {
|
|
printf("%s: read error (%ld, %lld)\n",
|
|
__func__, ret, start_sector);
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
}
|
|
memcpy((void *)tmp_buf +
|
|
start_offset % part->info.blksz,
|
|
buffer, residue);
|
|
|
|
ret = mmc_write(part, part->info.start +
|
|
start_sector, 1, tmp_buf);
|
|
if (ret != 1) {
|
|
printf("%s: write error (%ld, %lld)\n",
|
|
__func__, ret, start_sector);
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
}
|
|
}
|
|
|
|
io_cnt += residue;
|
|
buffer += residue;
|
|
start_offset += residue;
|
|
num_bytes -= residue;
|
|
continue;
|
|
}
|
|
|
|
if (sectors) {
|
|
if (io_type == IO_READ) {
|
|
ret = mmc_read_and_flush(part,
|
|
part->info.start +
|
|
start_sector,
|
|
sectors, buffer);
|
|
} else {
|
|
ret = mmc_write(part,
|
|
part->info.start +
|
|
start_sector,
|
|
sectors, buffer);
|
|
}
|
|
|
|
if (!ret) {
|
|
printf("%s: sector read error\n", __func__);
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
}
|
|
|
|
io_cnt += ret * part->info.blksz;
|
|
buffer += ret * part->info.blksz;
|
|
start_offset += ret * part->info.blksz;
|
|
num_bytes -= ret * part->info.blksz;
|
|
}
|
|
}
|
|
|
|
/* Set counter for read operation */
|
|
if (io_type == IO_READ && out_num_read)
|
|
*out_num_read = io_cnt;
|
|
|
|
return AVB_IO_RESULT_OK;
|
|
}
|
|
|
|
/**
|
|
* ============================================================================
|
|
* AVB 2.0 operations
|
|
* ============================================================================
|
|
*/
|
|
|
|
/**
|
|
* read_from_partition() - reads @num_bytes from @offset from partition
|
|
* identified by a string name
|
|
*
|
|
* @ops: contains AVB ops handlers
|
|
* @partition_name: partition name, NUL-terminated UTF-8 string
|
|
* @offset: offset from the beginning of partition
|
|
* @num_bytes: amount of bytes to read
|
|
* @buffer: destination buffer to store data
|
|
* @out_num_read:
|
|
*
|
|
* @return:
|
|
* AVB_IO_RESULT_OK, if partition was found and read operation succeed
|
|
* AVB_IO_RESULT_ERROR_IO, if i/o error occurred from the underlying i/o
|
|
* subsystem
|
|
* AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if there is no partition with
|
|
* the given name
|
|
*/
|
|
static AvbIOResult read_from_partition(AvbOps *ops,
|
|
const char *partition_name,
|
|
s64 offset_from_partition,
|
|
size_t num_bytes,
|
|
void *buffer,
|
|
size_t *out_num_read)
|
|
{
|
|
return mmc_byte_io(ops, partition_name, offset_from_partition,
|
|
num_bytes, buffer, out_num_read, IO_READ);
|
|
}
|
|
|
|
/**
|
|
* write_to_partition() - writes N bytes to a partition identified by a string
|
|
* name
|
|
*
|
|
* @ops: AvbOps, contains AVB ops handlers
|
|
* @partition_name: partition name
|
|
* @offset_from_partition: offset from the beginning of partition
|
|
* @num_bytes: amount of bytes to write
|
|
* @buf: data to write
|
|
* @out_num_read:
|
|
*
|
|
* @return:
|
|
* AVB_IO_RESULT_OK, if partition was found and read operation succeed
|
|
* AVB_IO_RESULT_ERROR_IO, if input/output error occurred
|
|
* AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if partition, specified in
|
|
* @partition_name was not found
|
|
*/
|
|
static AvbIOResult write_to_partition(AvbOps *ops,
|
|
const char *partition_name,
|
|
s64 offset_from_partition,
|
|
size_t num_bytes,
|
|
const void *buffer)
|
|
{
|
|
return mmc_byte_io(ops, partition_name, offset_from_partition,
|
|
num_bytes, (void *)buffer, NULL, IO_WRITE);
|
|
}
|
|
|
|
/**
|
|
* validate_vmbeta_public_key() - checks if the given public key used to sign
|
|
* the vbmeta partition is trusted
|
|
*
|
|
* @ops: AvbOps, contains AVB ops handlers
|
|
* @public_key_data: public key for verifying vbmeta partition signature
|
|
* @public_key_length: length of public key
|
|
* @public_key_metadata:
|
|
* @public_key_metadata_length:
|
|
* @out_key_is_trusted:
|
|
*
|
|
* @return:
|
|
* AVB_IO_RESULT_OK, if partition was found and read operation succeed
|
|
*/
|
|
static AvbIOResult validate_vbmeta_public_key(AvbOps *ops,
|
|
const u8 *public_key_data,
|
|
size_t public_key_length,
|
|
const u8
|
|
*public_key_metadata,
|
|
size_t
|
|
public_key_metadata_length,
|
|
bool *out_key_is_trusted)
|
|
{
|
|
if (!public_key_length || !public_key_data || !out_key_is_trusted)
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
|
|
*out_key_is_trusted = false;
|
|
if (public_key_length != sizeof(avb_root_pub))
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
|
|
if (memcmp(avb_root_pub, public_key_data, public_key_length) == 0)
|
|
*out_key_is_trusted = true;
|
|
|
|
return AVB_IO_RESULT_OK;
|
|
}
|
|
|
|
/**
|
|
* read_rollback_index() - gets the rollback index corresponding to the
|
|
* location of given by @out_rollback_index.
|
|
*
|
|
* @ops: contains AvbOps handlers
|
|
* @rollback_index_slot:
|
|
* @out_rollback_index: used to write a retrieved rollback index.
|
|
*
|
|
* @return
|
|
* AVB_IO_RESULT_OK, if the roolback index was retrieved
|
|
*/
|
|
static AvbIOResult read_rollback_index(AvbOps *ops,
|
|
size_t rollback_index_slot,
|
|
u64 *out_rollback_index)
|
|
{
|
|
/* For now we always return 0 as the stored rollback index. */
|
|
printf("%s not supported yet\n", __func__);
|
|
|
|
if (out_rollback_index)
|
|
*out_rollback_index = 0;
|
|
|
|
return AVB_IO_RESULT_OK;
|
|
}
|
|
|
|
/**
|
|
* write_rollback_index() - sets the rollback index corresponding to the
|
|
* location of given by @out_rollback_index.
|
|
*
|
|
* @ops: contains AvbOps handlers
|
|
* @rollback_index_slot:
|
|
* @rollback_index: rollback index to write.
|
|
*
|
|
* @return
|
|
* AVB_IO_RESULT_OK, if the roolback index was retrieved
|
|
*/
|
|
static AvbIOResult write_rollback_index(AvbOps *ops,
|
|
size_t rollback_index_slot,
|
|
u64 rollback_index)
|
|
{
|
|
/* For now this is a no-op. */
|
|
printf("%s not supported yet\n", __func__);
|
|
|
|
return AVB_IO_RESULT_OK;
|
|
}
|
|
|
|
/**
|
|
* read_is_device_unlocked() - gets whether the device is unlocked
|
|
*
|
|
* @ops: contains AVB ops handlers
|
|
* @out_is_unlocked: device unlock state is stored here, true if unlocked,
|
|
* false otherwise
|
|
*
|
|
* @return:
|
|
* AVB_IO_RESULT_OK: state is retrieved successfully
|
|
* AVB_IO_RESULT_ERROR_IO: an error occurred
|
|
*/
|
|
static AvbIOResult read_is_device_unlocked(AvbOps *ops, bool *out_is_unlocked)
|
|
{
|
|
/* For now we always return that the device is unlocked. */
|
|
|
|
printf("%s not supported yet\n", __func__);
|
|
|
|
*out_is_unlocked = true;
|
|
|
|
return AVB_IO_RESULT_OK;
|
|
}
|
|
|
|
/**
|
|
* get_unique_guid_for_partition() - gets the GUID for a partition identified
|
|
* by a string name
|
|
*
|
|
* @ops: contains AVB ops handlers
|
|
* @partition: partition name (NUL-terminated UTF-8 string)
|
|
* @guid_buf: buf, used to copy in GUID string. Example of value:
|
|
* 527c1c6d-6361-4593-8842-3c78fcd39219
|
|
* @guid_buf_size: @guid_buf buffer size
|
|
*
|
|
* @return:
|
|
* AVB_IO_RESULT_OK, on success (GUID found)
|
|
* AVB_IO_RESULT_ERROR_IO, if incorrect buffer size (@guid_buf_size) was
|
|
* provided
|
|
* AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if partition was not found
|
|
*/
|
|
static AvbIOResult get_unique_guid_for_partition(AvbOps *ops,
|
|
const char *partition,
|
|
char *guid_buf,
|
|
size_t guid_buf_size)
|
|
{
|
|
struct mmc_part *part;
|
|
size_t uuid_size;
|
|
|
|
part = get_partition(ops, partition);
|
|
if (!part)
|
|
return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION;
|
|
|
|
uuid_size = sizeof(part->info.uuid);
|
|
if (uuid_size > guid_buf_size)
|
|
return AVB_IO_RESULT_ERROR_IO;
|
|
|
|
memcpy(guid_buf, part->info.uuid, uuid_size);
|
|
guid_buf[uuid_size - 1] = 0;
|
|
|
|
return AVB_IO_RESULT_OK;
|
|
}
|
|
|
|
/**
|
|
* get_size_of_partition() - gets the size of a partition identified
|
|
* by a string name
|
|
*
|
|
* @ops: contains AVB ops handlers
|
|
* @partition: partition name (NUL-terminated UTF-8 string)
|
|
* @out_size_num_bytes: returns the value of a partition size
|
|
*
|
|
* @return:
|
|
* AVB_IO_RESULT_OK, on success (GUID found)
|
|
* AVB_IO_RESULT_ERROR_INSUFFICIENT_SPACE, out_size_num_bytes is NULL
|
|
* AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if partition was not found
|
|
*/
|
|
static AvbIOResult get_size_of_partition(AvbOps *ops,
|
|
const char *partition,
|
|
u64 *out_size_num_bytes)
|
|
{
|
|
struct mmc_part *part;
|
|
|
|
if (!out_size_num_bytes)
|
|
return AVB_IO_RESULT_ERROR_INSUFFICIENT_SPACE;
|
|
|
|
part = get_partition(ops, partition);
|
|
if (!part)
|
|
return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION;
|
|
|
|
*out_size_num_bytes = part->info.blksz * part->info.size;
|
|
|
|
return AVB_IO_RESULT_OK;
|
|
}
|
|
|
|
/**
|
|
* ============================================================================
|
|
* AVB2.0 AvbOps alloc/initialisation/free
|
|
* ============================================================================
|
|
*/
|
|
AvbOps *avb_ops_alloc(int boot_device)
|
|
{
|
|
struct AvbOpsData *ops_data;
|
|
|
|
ops_data = avb_calloc(sizeof(struct AvbOpsData));
|
|
if (!ops_data)
|
|
return NULL;
|
|
|
|
ops_data->ops.user_data = ops_data;
|
|
|
|
ops_data->ops.read_from_partition = read_from_partition;
|
|
ops_data->ops.write_to_partition = write_to_partition;
|
|
ops_data->ops.validate_vbmeta_public_key = validate_vbmeta_public_key;
|
|
ops_data->ops.read_rollback_index = read_rollback_index;
|
|
ops_data->ops.write_rollback_index = write_rollback_index;
|
|
ops_data->ops.read_is_device_unlocked = read_is_device_unlocked;
|
|
ops_data->ops.get_unique_guid_for_partition =
|
|
get_unique_guid_for_partition;
|
|
ops_data->ops.get_size_of_partition = get_size_of_partition;
|
|
ops_data->mmc_dev = boot_device;
|
|
|
|
return &ops_data->ops;
|
|
}
|
|
|
|
void avb_ops_free(AvbOps *ops)
|
|
{
|
|
struct AvbOpsData *ops_data;
|
|
|
|
if (!ops)
|
|
return;
|
|
|
|
ops_data = ops->user_data;
|
|
|
|
if (ops_data)
|
|
avb_free(ops_data);
|
|
}
|
|
|