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List:       qemu-discuss
Subject:    Qemu secret object not valid UTF-8 error reported
From:       Peter Luo <d8514 () sina ! com>
Date:       2020-05-07 6:00:49
Message-ID: 968C44A1-6D76-42C4-B62F-344185E7100D () sina ! com
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Hi, 

 

I'm using qemu-img to create a luks encrypted image, and the secret object is defined \
to use base64 format. 

I was expecting the secret content should be arbitrary bytes when using base64 format \
as per the qemu document. I also copied in the below.

 

##

# @QCryptoSecretFormat:

#

# The data format that the secret is provided in

#

# @raw: raw bytes. When encoded in JSON only valid UTF-8 sequences can be used

# @base64: arbitrary base64 encoded binary data

# Since: 2.6

##

{ 'enum': 'QCryptoSecretFormat',

 

  'prefix': 'QCRYPTO_SECRET_FORMAT',

 

  'data': ['raw', 'base64']} 

 

However qemu complains not valid UTF-8 and reports an error.

 

root@host:~# qemu-img create --object \
secret,id=vol-zk0brve6.secret,format=base64,data=ZUYLBsxOrKHhx4rdQdfX35B1PMfC806oX4nCBplrjyw= \
-o encrypt.format=luks,encrypt.key-secret=vol-zk0brve6.secret,encrypt.cipher-alg=aes-256 \
-f qcow2 1.img 10G

Formatting '1.img', fmt=qcow2 size=10737418240 encrypt.format=luks \
encrypt.key-secret=vol-zk0brve6.secret encrypt.cipher-alg=aes-256 cluster_size=65536 \
lazy_refcounts=off refcount_bits=16

qemu-img: 1.img: Data from secret vol-zk0brve6.secret is not valid UTF-8

 

root@host:~# qemu-img --version

qemu-img version 4.0.0.3

Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers

 

Am I using qemu-img in a wrong way?

 

Thanks,

Peter Luo

 


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class=WordSection1><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>Hi,&nbsp;<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>I'm using \
qemu-img to create a luks encrypted image, and the secret object is defined to use \
base64 format.&nbsp;<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>I was \
expecting the secret content should be arbitrary bytes when using base64 format as \
per the qemu document. I also copied in the below.<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>##<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'># \
@QCryptoSecretFormat:<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>#<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'># The data \
format that the secret is provided in<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>#<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'># @raw: raw \
bytes. When encoded in JSON only valid UTF-8 sequences can be \
used<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'># @base64: \
arbitrary base64 encoded binary data<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'># Since: \
2.6<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>##<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>{ 'enum': \
'QCryptoSecretFormat',<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>&nbsp; \
'prefix': 'QCRYPTO_SECRET_FORMAT',<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>&nbsp; \
'data': ['raw', 'base64']}&nbsp;<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>However \
qemu complains not valid UTF-8 and reports an error.<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>root@host:~# \
qemu-img create --object \
secret,id=vol-zk0brve6.secret,format=base64,data=ZUYLBsxOrKHhx4rdQdfX35B1PMfC806oX4nCBplrjyw= \
-o encrypt.format=luks,encrypt.key-secret=vol-zk0brve6.secret,encrypt.cipher-alg=aes-256 \
-f qcow2 1.img 10G<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>Formatting \
'1.img', fmt=qcow2 size=10737418240 encrypt.format=luks \
encrypt.key-secret=vol-zk0brve6.secret encrypt.cipher-alg=aes-256 cluster_size=65536 \
lazy_refcounts=off refcount_bits=16<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>qemu-img: \
1.img: Data from secret vol-zk0brve6.secret is not valid \
UTF-8<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>root@host:~# \
qemu-img --version<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>qemu-img \
version 4.0.0.3<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>Copyright \
(c) 2003-2019 Fabrice Bellard and the QEMU Project developers<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>Am I using \
qemu-img in a wrong way?<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'><o:p>&nbsp;</o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>Thanks,<o:p></o:p></span></p><p \
class=MsoNormal><span \
style='font-size:11.0pt;font-family:"-webkit-standard",serif;color:black'>Peter \
Luo<o:p></o:p></span></p><p class=MsoNormal><span \
style='font-size:11.0pt'><o:p>&nbsp;</o:p></span></p></div></body></html>



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