diff mbox series

[isar-cip-core,v6,3/7] start-qemu.sh: Create a tpm2 device

Message ID 20230309102821.307140-4-Quirin.Gylstorff@siemens.com (mailing list archive)
State Superseded
Headers show
Series Encrypt Partition in initramfs | expand

Commit Message

Gylstorff Quirin March 9, 2023, 10:28 a.m. UTC 
From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

This allows testing the partition encryption with qemu.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 start-qemu.sh | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

Comments

Jan Kiszka March 13, 2023, 7:08 a.m. UTC | #1 
On 09.03.23 11:28, Quirin Gylstorff wrote:
> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> 
> This allows testing the partition encryption with qemu.
> 
> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> ---
>  start-qemu.sh | 27 ++++++++++++++++++++++-----
>  1 file changed, 22 insertions(+), 5 deletions(-)
> 
> diff --git a/start-qemu.sh b/start-qemu.sh
> index fcfbc5b..b46b066 100755
> --- a/start-qemu.sh
> +++ b/start-qemu.sh
> @@ -28,6 +28,9 @@ if grep -s -q "IMAGE_SECURE_BOOT: true" .config.yaml; then
>  elif grep -s -q "IMAGE_SWUPDATE: true" .config.yaml; then
>  	SWUPDATE_BOOT="true"
>  fi
> +if grep -s -q "IMAGE_DATA_ENCRYPTION: true" .config.yaml; then
> +	TPM2_ENCRYPTION="true"
> +fi
>  
>  if [ -n "${QEMU_PATH}" ]; then
>  	QEMU_PATH="${QEMU_PATH}/"
> @@ -143,7 +146,21 @@ QEMU_COMMON_OPTIONS=" \
>  	-m 1G \
>  	-serial mon:stdio \
>  	-netdev user,id=net,hostfwd=tcp:127.0.0.1:22222-:22 \
> -	${QEMU_EXTRA_ARGS}"
> +	"
> +
> +if [ "$TPM2_ENCRYPTION" = "true" ] && [ -x /usr/bin/swtpm ]; then
> +	swtpm_dir="/tmp/qemu-swtpm"
> +	mkdir -p "${swtpm_dir}"
> +	rm "${swtpm_dir}"/*

This kills the previous TPM state, preventing to power-cycle the VM. We
rather need to persist it aside the disk image. I'm massaging the script
in that direction.

Unfortunately, the unix socket can't be pushed there as well - path
string becomes too long...

Jan

> +	if swtpm socket -d --tpmstate dir="${swtpm_dir}" \
> +			 --ctrl type=unixio,path="${swtpm_dir}"/sock \
> +			 --tpm2; then
> +		QEMU_EXTRA_ARGS="${QEMU_EXTRA_ARGS} \
> +			 -chardev socket,id=chrtpm,path=${swtpm_dir}/sock \
> +			 -tpmdev emulator,id=tpm0,chardev=chrtpm \
> +			 -device tpm-tis,tpmdev=tpm0"
> +	fi
> +fi
>  
>  if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
>  	case "${arch}" in
> @@ -158,14 +175,14 @@ if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
>  					-drive if=pflash,format=raw,unit=0,readonly=on,file=${ovmf_code} \
>  					-drive if=pflash,format=raw,file=${ovmf_vars} \
>  					-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
> -					${QEMU_COMMON_OPTIONS} "$@"
> +					${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
>  			else
>  				ovmf_code=${OVMF_CODE:-./build/tmp/deploy/images/qemu-amd64/OVMF/OVMF_CODE_4M.fd}
>  
>  				${QEMU_PATH}${QEMU} \
>  					-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
>  					-drive if=pflash,format=raw,unit=0,readonly=on,file=${ovmf_code} \
> -					${QEMU_COMMON_OPTIONS} "$@"
> +					${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
>  			fi
>  			;;
>  		arm64|aarch64|arm|armhf)
> @@ -174,7 +191,7 @@ if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
>  			${QEMU_PATH}${QEMU} \
>  				-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
>  				-bios ${u_boot_bin} \
> -				${QEMU_COMMON_OPTIONS} "$@"
> +				${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
>  			;;
>  		rv64|riscv64)
>  			opensbi_bin=${FIRMWARE_BIN:-./build/tmp/deploy/images/qemu-${QEMU_ARCH}/fw_payload.bin}
> @@ -199,5 +216,5 @@ else
>  			-drive file=${IMAGE_FILE},discard=unmap,if=none,id=disk,format=raw \
>  			-kernel ${KERNEL_FILE} -append "${KERNEL_CMDLINE}" \
>  			-initrd ${INITRD_FILE} \
> -			${QEMU_COMMON_OPTIONS} "$@"
> +			${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
>  fi
Gylstorff Quirin March 13, 2023, 8:13 a.m. UTC | #2 
On 3/13/23 08:08, Jan Kiszka wrote:
> On 09.03.23 11:28, Quirin Gylstorff wrote:
>> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>
>> This allows testing the partition encryption with qemu.
>>
>> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>> ---
>>   start-qemu.sh | 27 ++++++++++++++++++++++-----
>>   1 file changed, 22 insertions(+), 5 deletions(-)
>>
>> diff --git a/start-qemu.sh b/start-qemu.sh
>> index fcfbc5b..b46b066 100755
>> --- a/start-qemu.sh
>> +++ b/start-qemu.sh
>> @@ -28,6 +28,9 @@ if grep -s -q "IMAGE_SECURE_BOOT: true" .config.yaml; then
>>   elif grep -s -q "IMAGE_SWUPDATE: true" .config.yaml; then
>>   	SWUPDATE_BOOT="true"
>>   fi
>> +if grep -s -q "IMAGE_DATA_ENCRYPTION: true" .config.yaml; then
>> +	TPM2_ENCRYPTION="true"
>> +fi
>>   
>>   if [ -n "${QEMU_PATH}" ]; then
>>   	QEMU_PATH="${QEMU_PATH}/"
>> @@ -143,7 +146,21 @@ QEMU_COMMON_OPTIONS=" \
>>   	-m 1G \
>>   	-serial mon:stdio \
>>   	-netdev user,id=net,hostfwd=tcp:127.0.0.1:22222-:22 \
>> -	${QEMU_EXTRA_ARGS}"
>> +	"
>> +
>> +if [ "$TPM2_ENCRYPTION" = "true" ] && [ -x /usr/bin/swtpm ]; then
>> +	swtpm_dir="/tmp/qemu-swtpm"
>> +	mkdir -p "${swtpm_dir}"
>> +	rm "${swtpm_dir}"/*
> 
> This kills the previous TPM state, preventing to power-cycle the VM. We
> rather need to persist it aside the disk image. I'm massaging the script
> in that direction.
> 

This was for debugging purposes as the TPM is no longer accessible after 
a number of keys entered.

Quirin
> Unfortunately, the unix socket can't be pushed there as well - path
> string becomes too long...
> 
> Jan
> 
>> +	if swtpm socket -d --tpmstate dir="${swtpm_dir}" \
>> +			 --ctrl type=unixio,path="${swtpm_dir}"/sock \
>> +			 --tpm2; then
>> +		QEMU_EXTRA_ARGS="${QEMU_EXTRA_ARGS} \
>> +			 -chardev socket,id=chrtpm,path=${swtpm_dir}/sock \
>> +			 -tpmdev emulator,id=tpm0,chardev=chrtpm \
>> +			 -device tpm-tis,tpmdev=tpm0"
>> +	fi
>> +fi
>>   
>>   if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
>>   	case "${arch}" in
>> @@ -158,14 +175,14 @@ if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
>>   					-drive if=pflash,format=raw,unit=0,readonly=on,file=${ovmf_code} \
>>   					-drive if=pflash,format=raw,file=${ovmf_vars} \
>>   					-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
>> -					${QEMU_COMMON_OPTIONS} "$@"
>> +					${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
>>   			else
>>   				ovmf_code=${OVMF_CODE:-./build/tmp/deploy/images/qemu-amd64/OVMF/OVMF_CODE_4M.fd}
>>   
>>   				${QEMU_PATH}${QEMU} \
>>   					-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
>>   					-drive if=pflash,format=raw,unit=0,readonly=on,file=${ovmf_code} \
>> -					${QEMU_COMMON_OPTIONS} "$@"
>> +					${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
>>   			fi
>>   			;;
>>   		arm64|aarch64|arm|armhf)
>> @@ -174,7 +191,7 @@ if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
>>   			${QEMU_PATH}${QEMU} \
>>   				-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
>>   				-bios ${u_boot_bin} \
>> -				${QEMU_COMMON_OPTIONS} "$@"
>> +				${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
>>   			;;
>>   		rv64|riscv64)
>>   			opensbi_bin=${FIRMWARE_BIN:-./build/tmp/deploy/images/qemu-${QEMU_ARCH}/fw_payload.bin}
>> @@ -199,5 +216,5 @@ else
>>   			-drive file=${IMAGE_FILE},discard=unmap,if=none,id=disk,format=raw \
>>   			-kernel ${KERNEL_FILE} -append "${KERNEL_CMDLINE}" \
>>   			-initrd ${INITRD_FILE} \
>> -			${QEMU_COMMON_OPTIONS} "$@"
>> +			${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
>>   fi
>
Jan Kiszka March 13, 2023, 9:13 a.m. UTC | #3 
On 13.03.23 09:13, Gylstorff Quirin wrote:
> 
> 
> On 3/13/23 08:08, Jan Kiszka wrote:
>> On 09.03.23 11:28, Quirin Gylstorff wrote:
>>> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>>
>>> This allows testing the partition encryption with qemu.
>>>
>>> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>> ---
>>>   start-qemu.sh | 27 ++++++++++++++++++++++-----
>>>   1 file changed, 22 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/start-qemu.sh b/start-qemu.sh
>>> index fcfbc5b..b46b066 100755
>>> --- a/start-qemu.sh
>>> +++ b/start-qemu.sh
>>> @@ -28,6 +28,9 @@ if grep -s -q "IMAGE_SECURE_BOOT: true"
>>> .config.yaml; then
>>>   elif grep -s -q "IMAGE_SWUPDATE: true" .config.yaml; then
>>>       SWUPDATE_BOOT="true"
>>>   fi
>>> +if grep -s -q "IMAGE_DATA_ENCRYPTION: true" .config.yaml; then
>>> +    TPM2_ENCRYPTION="true"
>>> +fi
>>>     if [ -n "${QEMU_PATH}" ]; then
>>>       QEMU_PATH="${QEMU_PATH}/"
>>> @@ -143,7 +146,21 @@ QEMU_COMMON_OPTIONS=" \
>>>       -m 1G \
>>>       -serial mon:stdio \
>>>       -netdev user,id=net,hostfwd=tcp:127.0.0.1:22222-:22 \
>>> -    ${QEMU_EXTRA_ARGS}"
>>> +    "
>>> +
>>> +if [ "$TPM2_ENCRYPTION" = "true" ] && [ -x /usr/bin/swtpm ]; then
>>> +    swtpm_dir="/tmp/qemu-swtpm"
>>> +    mkdir -p "${swtpm_dir}"
>>> +    rm "${swtpm_dir}"/*
>>
>> This kills the previous TPM state, preventing to power-cycle the VM. We
>> rather need to persist it aside the disk image. I'm massaging the script
>> in that direction.
>>
> 
> This was for debugging purposes as the TPM is no longer accessible after
> a number of keys entered.
> 

At least it is possible to encrypt a new image using the TPM state of a
previous run, just tested. In which cases exactly does this issue hurt?

Jan
Gylstorff Quirin March 13, 2023, 10:29 a.m. UTC | #4 
On 3/13/23 10:13, Jan Kiszka wrote:
> On 13.03.23 09:13, Gylstorff Quirin wrote:
>>
>>
>> On 3/13/23 08:08, Jan Kiszka wrote:
>>> On 09.03.23 11:28, Quirin Gylstorff wrote:
>>>> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>>>
>>>> This allows testing the partition encryption with qemu.
>>>>
>>>> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>>> ---
>>>>    start-qemu.sh | 27 ++++++++++++++++++++++-----
>>>>    1 file changed, 22 insertions(+), 5 deletions(-)
>>>>
>>>> diff --git a/start-qemu.sh b/start-qemu.sh
>>>> index fcfbc5b..b46b066 100755
>>>> --- a/start-qemu.sh
>>>> +++ b/start-qemu.sh
>>>> @@ -28,6 +28,9 @@ if grep -s -q "IMAGE_SECURE_BOOT: true"
>>>> .config.yaml; then
>>>>    elif grep -s -q "IMAGE_SWUPDATE: true" .config.yaml; then
>>>>        SWUPDATE_BOOT="true"
>>>>    fi
>>>> +if grep -s -q "IMAGE_DATA_ENCRYPTION: true" .config.yaml; then
>>>> +    TPM2_ENCRYPTION="true"
>>>> +fi
>>>>      if [ -n "${QEMU_PATH}" ]; then
>>>>        QEMU_PATH="${QEMU_PATH}/"
>>>> @@ -143,7 +146,21 @@ QEMU_COMMON_OPTIONS=" \
>>>>        -m 1G \
>>>>        -serial mon:stdio \
>>>>        -netdev user,id=net,hostfwd=tcp:127.0.0.1:22222-:22 \
>>>> -    ${QEMU_EXTRA_ARGS}"
>>>> +    "
>>>> +
>>>> +if [ "$TPM2_ENCRYPTION" = "true" ] && [ -x /usr/bin/swtpm ]; then
>>>> +    swtpm_dir="/tmp/qemu-swtpm"
>>>> +    mkdir -p "${swtpm_dir}"
>>>> +    rm "${swtpm_dir}"/*
>>>
>>> This kills the previous TPM state, preventing to power-cycle the VM. We
>>> rather need to persist it aside the disk image. I'm massaging the script
>>> in that direction.
>>>
>>
>> This was for debugging purposes as the TPM is no longer accessible after
>> a number of keys entered.
>>
> 
> At least it is possible to encrypt a new image using the TPM state of a
> previous run, just tested. In which cases exactly does this issue hurt?

After creating 8 keys/Images the 9th time you want to add a key to a new 
the TPM will throw a error.

Quirin

> 
> Jan
>
Jan Kiszka March 13, 2023, 1:10 p.m. UTC | #5 
On 13.03.23 11:29, Gylstorff Quirin wrote:
> 
> 
> On 3/13/23 10:13, Jan Kiszka wrote:
>> On 13.03.23 09:13, Gylstorff Quirin wrote:
>>>
>>>
>>> On 3/13/23 08:08, Jan Kiszka wrote:
>>>> On 09.03.23 11:28, Quirin Gylstorff wrote:
>>>>> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>>>>
>>>>> This allows testing the partition encryption with qemu.
>>>>>
>>>>> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>>>> ---
>>>>>    start-qemu.sh | 27 ++++++++++++++++++++++-----
>>>>>    1 file changed, 22 insertions(+), 5 deletions(-)
>>>>>
>>>>> diff --git a/start-qemu.sh b/start-qemu.sh
>>>>> index fcfbc5b..b46b066 100755
>>>>> --- a/start-qemu.sh
>>>>> +++ b/start-qemu.sh
>>>>> @@ -28,6 +28,9 @@ if grep -s -q "IMAGE_SECURE_BOOT: true"
>>>>> .config.yaml; then
>>>>>    elif grep -s -q "IMAGE_SWUPDATE: true" .config.yaml; then
>>>>>        SWUPDATE_BOOT="true"
>>>>>    fi
>>>>> +if grep -s -q "IMAGE_DATA_ENCRYPTION: true" .config.yaml; then
>>>>> +    TPM2_ENCRYPTION="true"
>>>>> +fi
>>>>>      if [ -n "${QEMU_PATH}" ]; then
>>>>>        QEMU_PATH="${QEMU_PATH}/"
>>>>> @@ -143,7 +146,21 @@ QEMU_COMMON_OPTIONS=" \
>>>>>        -m 1G \
>>>>>        -serial mon:stdio \
>>>>>        -netdev user,id=net,hostfwd=tcp:127.0.0.1:22222-:22 \
>>>>> -    ${QEMU_EXTRA_ARGS}"
>>>>> +    "
>>>>> +
>>>>> +if [ "$TPM2_ENCRYPTION" = "true" ] && [ -x /usr/bin/swtpm ]; then
>>>>> +    swtpm_dir="/tmp/qemu-swtpm"
>>>>> +    mkdir -p "${swtpm_dir}"
>>>>> +    rm "${swtpm_dir}"/*
>>>>
>>>> This kills the previous TPM state, preventing to power-cycle the VM. We
>>>> rather need to persist it aside the disk image. I'm massaging the
>>>> script
>>>> in that direction.
>>>>
>>>
>>> This was for debugging purposes as the TPM is no longer accessible after
>>> a number of keys entered.
>>>
>>
>> At least it is possible to encrypt a new image using the TPM state of a
>> previous run, just tested. In which cases exactly does this issue hurt?
> 
> After creating 8 keys/Images the 9th time you want to add a key to a new
> the TPM will throw a error.
> 

So, every boot-strap of a new image will add one key, and that will
start to fail after the 8th time. Then we should purge the newly created
subfolder in deploydir when performing an image deployment.

Jan
diff mbox series

Patch

diff --git a/start-qemu.sh b/start-qemu.sh
index fcfbc5b..b46b066 100755
--- a/start-qemu.sh
+++ b/start-qemu.sh
@@ -28,6 +28,9 @@  if grep -s -q "IMAGE_SECURE_BOOT: true" .config.yaml; then
 elif grep -s -q "IMAGE_SWUPDATE: true" .config.yaml; then
 	SWUPDATE_BOOT="true"
 fi
+if grep -s -q "IMAGE_DATA_ENCRYPTION: true" .config.yaml; then
+	TPM2_ENCRYPTION="true"
+fi
 
 if [ -n "${QEMU_PATH}" ]; then
 	QEMU_PATH="${QEMU_PATH}/"
@@ -143,7 +146,21 @@  QEMU_COMMON_OPTIONS=" \
 	-m 1G \
 	-serial mon:stdio \
 	-netdev user,id=net,hostfwd=tcp:127.0.0.1:22222-:22 \
-	${QEMU_EXTRA_ARGS}"
+	"
+
+if [ "$TPM2_ENCRYPTION" = "true" ] && [ -x /usr/bin/swtpm ]; then
+	swtpm_dir="/tmp/qemu-swtpm"
+	mkdir -p "${swtpm_dir}"
+	rm "${swtpm_dir}"/*
+	if swtpm socket -d --tpmstate dir="${swtpm_dir}" \
+			 --ctrl type=unixio,path="${swtpm_dir}"/sock \
+			 --tpm2; then
+		QEMU_EXTRA_ARGS="${QEMU_EXTRA_ARGS} \
+			 -chardev socket,id=chrtpm,path=${swtpm_dir}/sock \
+			 -tpmdev emulator,id=tpm0,chardev=chrtpm \
+			 -device tpm-tis,tpmdev=tpm0"
+	fi
+fi
 
 if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
 	case "${arch}" in
@@ -158,14 +175,14 @@  if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
 					-drive if=pflash,format=raw,unit=0,readonly=on,file=${ovmf_code} \
 					-drive if=pflash,format=raw,file=${ovmf_vars} \
 					-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
-					${QEMU_COMMON_OPTIONS} "$@"
+					${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
 			else
 				ovmf_code=${OVMF_CODE:-./build/tmp/deploy/images/qemu-amd64/OVMF/OVMF_CODE_4M.fd}
 
 				${QEMU_PATH}${QEMU} \
 					-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
 					-drive if=pflash,format=raw,unit=0,readonly=on,file=${ovmf_code} \
-					${QEMU_COMMON_OPTIONS} "$@"
+					${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
 			fi
 			;;
 		arm64|aarch64|arm|armhf)
@@ -174,7 +191,7 @@  if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
 			${QEMU_PATH}${QEMU} \
 				-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
 				-bios ${u_boot_bin} \
-				${QEMU_COMMON_OPTIONS} "$@"
+				${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
 			;;
 		rv64|riscv64)
 			opensbi_bin=${FIRMWARE_BIN:-./build/tmp/deploy/images/qemu-${QEMU_ARCH}/fw_payload.bin}
@@ -199,5 +216,5 @@  else
 			-drive file=${IMAGE_FILE},discard=unmap,if=none,id=disk,format=raw \
 			-kernel ${KERNEL_FILE} -append "${KERNEL_CMDLINE}" \
 			-initrd ${INITRD_FILE} \
-			${QEMU_COMMON_OPTIONS} "$@"
+			${QEMU_COMMON_OPTIONS} ${QEMU_EXTRA_ARGS} "$@"
 fi