NAME

       vbutil_kernel - Utility to sign custom kernels to boot with Chrome OS devices

SYNOPSIS

       futility /usr/bin/vbutil_kernel --pack <file> [PARAMETERS]

DESCRIPTION

              Required parameters:

       --keyblock <file>
              Key block in .keyblock format

       --signprivate <file>
              Private key to sign kernel data, in .vbprivk format

       --version <number>
              Kernel version

       --vmlinuz <file>
              Linux kernel bzImage file

       --bootloader <file>
              Bootloader stub

       --config <file>
              Command line file

       --arch <arch>
              Cpu architecture (default x86)

              Optional:

       --kloadaddr <address>
              Assign kernel body load address

       --pad <number>
              Verification padding size in bytes

       --vblockonly
              Emit just the verification blob

       --flags NUM
              Flags to be passed in the header

       OR

       Usage:  futility /usr/bin/vbutil_kernel --repack <file> [PARAMETERS]

              Required parameters:

       --signprivate <file>
              Private key to sign kernel data, in .vbprivk format

       --oldblob <file>
              Previously packed kernel blob (including verification blob)

              Optional:

       --keyblock <file>
              Key block in .keyblock format

       --config <file>
              New command line file

       --version <number>
              Kernel version

       --kloadaddr <address>
              Assign kernel body load address

       --pad <number>
              Verification blob size in bytes

       --vblockonly
              Emit just the verification blob

       OR

       Usage:  futility /usr/bin/vbutil_kernel --verify <file> [PARAMETERS]

              Optional:

       --signpubkey <file>
              Public key to verify kernel keyblock, in .vbpubk format

       --verbose
              Print a more detailed report

       --keyblock <file>
              Outputs the verified key block, in .keyblock format

       --pad <number>
              Verification padding size in bytes

       --minversion <number>
              Minimum combined kernel key version

       OR

       Usage:  futility /usr/bin/vbutil_kernel --get-vmlinuz <file> [PARAMETERS]

              Required parameters:

       --vmlinuz-out <file>
              vmlinuz image output file

       Usage:  futility /usr/bin/vbutil_kernel --pack <file> [PARAMETERS]

              Required parameters:

       --keyblock <file>
              Key block in .keyblock format

       --signprivate <file>
              Private key to sign kernel data, in .vbprivk format

       --version <number>
              Kernel version

       --vmlinuz <file>
              Linux kernel bzImage file

       --bootloader <file>
              Bootloader stub

       --config <file>
              Command line file

       --arch <arch>
              Cpu architecture (default x86)

              Optional:

       --kloadaddr <address>
              Assign kernel body load address

       --pad <number>
              Verification padding size in bytes

       --vblockonly
              Emit just the verification blob

       --flags NUM
              Flags to be passed in the header

       OR

       Usage:  futility /usr/bin/vbutil_kernel --repack <file> [PARAMETERS]

              Required parameters:

       --signprivate <file>
              Private key to sign kernel data, in .vbprivk format

       --oldblob <file>
              Previously packed kernel blob (including verification blob)

              Optional:

       --keyblock <file>
              Key block in .keyblock format

       --config <file>
              New command line file

       --version <number>
              Kernel version

       --kloadaddr <address>
              Assign kernel body load address

       --pad <number>
              Verification blob size in bytes

       --vblockonly
              Emit just the verification blob

       OR

       Usage:  futility /usr/bin/vbutil_kernel --verify <file> [PARAMETERS]

              Optional:

       --signpubkey <file>
              Public key to verify kernel keyblock, in .vbpubk format

       --verbose
              Print a more detailed report

       --keyblock <file>
              Outputs the verified key block, in .keyblock format

       --pad <number>
              Verification padding size in bytes

       --minversion <number>
              Minimum combined kernel key version

       OR

       Usage:  futility /usr/bin/vbutil_kernel --get-vmlinuz <file> [PARAMETERS]

              Required parameters:

       --vmlinuz-out <file>
              vmlinuz image output file