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Bug 1043972

Summary:	3.2.3. OpenSSL Intel AES-NI Engine is outdated
Product:	Red Hat Enterprise Linux 6	Reporter:	Miroslav Vadkerti <mvadkert>
Component:	doc-Security_Guide	Assignee:	Bara Ancincova <bancinco>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Tomas Capek <tcapek>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.5	CC:	bancinco, ebenes, fweimer, hkario, msvoboda
Target Milestone:	rc	Keywords:	Documentation
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-04-21 11:31:37 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Miroslav Vadkerti 2013-12-17 14:28:01 UTC

Description of problem:
Test of AES-NI Engine is outdated. In current version of openssl the check for AES-NI engine is invalid, the engine won't be shown in the output.

According to the developer a proper check that AES-NI is working is:
1. to check if machine has AES instruction set, i.e.
grep -o aes /proc/cpuinfo
2. compare results of "openssl speed aes-128-cbc" vs "openssl speed -evp aes-128-cbc"
where the latter should be significantly better performing.

Please also note that the guide is incorrect in the example of openssl speed command without the -evp option. Without this option AES-NI engine is not used.

Version-Release number of selected component (if applicable):
current live @
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Security_Guide/ch03s02s03.html

Comment 2 Miroslav Vadkerti 2014-07-25 10:10:57 UTC

The reproduced is correct, I just tested in on an AES testing machine


# grep -m1 -o aes /proc/cpuinfo
aes

# openssl speed aes-128-cbc
Doing aes-128 cbc for 3s on 16 size blocks: 18693032 aes-128 cbc's in 3.00s
Doing aes-128 cbc for 3s on 64 size blocks: 5052796 aes-128 cbc's in 3.00s
Doing aes-128 cbc for 3s on 256 size blocks: 1288608 aes-128 cbc's in 3.00s
Doing aes-128 cbc for 3s on 1024 size blocks: 323906 aes-128 cbc's in 3.00s
Doing aes-128 cbc for 3s on 8192 size blocks: 40555 aes-128 cbc's in 3.00s
OpenSSL 1.0.1e-fips 11 Feb 2013
built on: Fri Sep 27 10:09:12 EDT 2013
options:bn(64,64) md2(int) rc4(16x,int) des(idx,cisc,16,int) aes(partial) idea(int) blowfish(idx) 
compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DKRB5_MIT -m64 -DL_ENDIAN -DTERMIO -Wall -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -Wa,--noexecstack -DPURIFY -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
The 'numbers' are in 1000s of bytes per second processed.
type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
aes-128 cbc      99696.17k   107792.98k   109961.22k   110559.91k   110742.19k


# openssl speed -evp aes-128-cbc
Doing aes-128-cbc for 3s on 16 size blocks: 150084418 aes-128-cbc's in 3.00s
Doing aes-128-cbc for 3s on 64 size blocks: 40934523 aes-128-cbc's in 3.00s
Doing aes-128-cbc for 3s on 256 size blocks: 10510135 aes-128-cbc's in 3.00s
Doing aes-128-cbc for 3s on 1024 size blocks: 2646815 aes-128-cbc's in 3.00s
Doing aes-128-cbc for 3s on 8192 size blocks: 330598 aes-128-cbc's in 3.00s
OpenSSL 1.0.1e-fips 11 Feb 2013
built on: Fri Sep 27 10:09:12 EDT 2013
options:bn(64,64) md2(int) rc4(16x,int) des(idx,cisc,16,int) aes(partial) idea(int) blowfish(idx) 
compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DKRB5_MIT -m64 -DL_ENDIAN -DTERMIO -Wall -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -Wa,--noexecstack -DPURIFY -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM
The 'numbers' are in 1000s of bytes per second processed.
type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
aes-128-cbc     800450.23k   873269.82k   896864.85k   903446.19k   902752.94k

Comment 6 Bara Ancincova 2015-04-21 11:31:37 UTC

The updated text is already on the Portal:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html-single/Security_Guide/index.html#sect-Security_Guide-Encryption-OpenSSL_Intel_AES-NI_Engine

Closing this bug as CLOSED CURRENTRELEASE.