26 lines
746 B
C
26 lines
746 B
C
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#define VERITY_ARG " verity.usrhash="
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#define VERITY_HASH_OFFSET 0x40
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#define VERITY_HASH_LENGTH 64
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static inline void grub_pass_verity_hash(struct linux_kernel_header *lh,
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char *cmdline)
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{
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char *buf = (char *)lh;
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grub_size_t cmdline_len;
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int i;
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for (i=VERITY_HASH_OFFSET; i<VERITY_HASH_OFFSET + VERITY_HASH_LENGTH; i++)
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{
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if (buf[i] < '0' || buf[i] > '9') // Not a number
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if (buf[i] < 'a' || buf[i] > 'f') // Not a hex letter
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return;
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}
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grub_memcpy (cmdline + grub_strlen(cmdline), VERITY_ARG,
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sizeof (VERITY_ARG));
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cmdline_len = grub_strlen(cmdline);
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grub_memcpy (cmdline + cmdline_len, buf + VERITY_HASH_OFFSET,
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VERITY_HASH_LENGTH);
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cmdline[cmdline_len + VERITY_HASH_LENGTH] = '\0';
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}
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