73ebaac827
Sometimes the error handling returns an ASN1_STRING
object in *out although that was not passed in by the
caller, and sometimes the error handling deletes the
ASN1_STRING but forgets to clear the *out parameter.
Therefore the caller has no chance to know, if the leaked
object in *out shall be deleted or not.
This may cause a use-after-free error e.g. in asn1_str2type:
==63312==ERROR: AddressSanitizer: heap-use-after-free on address 0x603000073280 at pc 0x7f2652e93b08 bp 0x7ffe0e1951c0 sp 0x7ffe0e1951b0
READ of size 8 at 0x603000073280 thread T0
#0 0x7f2652e93b07 in asn1_string_embed_free crypto/asn1/asn1_lib.c:354
#1 0x7f2652eb521a in asn1_primitive_free crypto/asn1/tasn_fre.c:204
#2 0x7f2652eb50a9 in asn1_primitive_free crypto/asn1/tasn_fre.c:199
#3 0x7f2652eb5b67 in ASN1_item_free crypto/asn1/tasn_fre.c:20
#4 0x7f2652e8e13b in asn1_str2type crypto/asn1/asn1_gen.c:740
#5 0x7f2652e8e13b in generate_v3 crypto/asn1/asn1_gen.c:137
#6 0x7f2652e9166c in ASN1_generate_v3 crypto/asn1/asn1_gen.c:92
#7 0x7f2653307b9b in do_othername crypto/x509v3/v3_alt.c:577
#8 0x7f2653307b9b in a2i_GENERAL_NAME crypto/x509v3/v3_alt.c:492
#9 0x7f26533087c2 in v2i_subject_alt crypto/x509v3/v3_alt.c:327
#10 0x7f26533107fc in do_ext_nconf crypto/x509v3/v3_conf.c:100
#11 0x7f2653310f33 in X509V3_EXT_nconf crypto/x509v3/v3_conf.c:45
#12 0x7f2653311426 in X509V3_EXT_add_nconf_sk crypto/x509v3/v3_conf.c:312
#13 0x7f265331170c in X509V3_EXT_REQ_add_nconf crypto/x509v3/v3_conf.c:360
#14 0x564ed19d5f25 in req_main apps/req.c:806
#15 0x564ed19b8de0 in do_cmd apps/openssl.c:564
#16 0x564ed1985165 in main apps/openssl.c:183
#17 0x7f2651c4a082 in __libc_start_main ../csu/libc-start.c:308
#18 0x564ed1985acd in _start (/home/ed/OPCToolboxV5/Source/Core/OpenSSL/openssl/apps/openssl+0x139acd)
0x603000073280 is located 16 bytes inside of 24-byte region [0x603000073270,0x603000073288)
freed by thread T0 here:
#0 0x7f265413440f in __interceptor_free ../../../../src/libsanitizer/asan/asan_malloc_linux.cc:122
#1 0x7f265315a429 in CRYPTO_free crypto/mem.c:311
#2 0x7f265315a429 in CRYPTO_free crypto/mem.c:300
#3 0x7f2652e757b9 in ASN1_mbstring_ncopy crypto/asn1/a_mbstr.c:191
#4 0x7f2652e75ec5 in ASN1_mbstring_copy crypto/asn1/a_mbstr.c:38
#5 0x7f2652e8e227 in asn1_str2type crypto/asn1/asn1_gen.c:681
#6 0x7f2652e8e227 in generate_v3 crypto/asn1/asn1_gen.c:137
#7 0x7f2652e9166c in ASN1_generate_v3 crypto/asn1/asn1_gen.c:92
#8 0x7f2653307b9b in do_othername crypto/x509v3/v3_alt.c:577
#9 0x7f2653307b9b in a2i_GENERAL_NAME crypto/x509v3/v3_alt.c:492
#10 0x7f26533087c2 in v2i_subject_alt crypto/x509v3/v3_alt.c:327
#11 0x7f26533107fc in do_ext_nconf crypto/x509v3/v3_conf.c:100
#12 0x7f2653310f33 in X509V3_EXT_nconf crypto/x509v3/v3_conf.c:45
#13 0x7f2653311426 in X509V3_EXT_add_nconf_sk crypto/x509v3/v3_conf.c:312
#14 0x7f265331170c in X509V3_EXT_REQ_add_nconf crypto/x509v3/v3_conf.c:360
#15 0x564ed19d5f25 in req_main apps/req.c:806
#16 0x564ed19b8de0 in do_cmd apps/openssl.c:564
#17 0x564ed1985165 in main apps/openssl.c:183
#18 0x7f2651c4a082 in __libc_start_main ../csu/libc-start.c:308
previously allocated by thread T0 here:
#0 0x7f2654134808 in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cc:144
#1 0x7f265315a4fd in CRYPTO_malloc crypto/mem.c:221
#2 0x7f265315a4fd in CRYPTO_malloc crypto/mem.c:198
#3 0x7f265315a945 in CRYPTO_zalloc crypto/mem.c:236
#4 0x7f2652e939a4 in ASN1_STRING_type_new crypto/asn1/asn1_lib.c:341
#5 0x7f2652e74e51 in ASN1_mbstring_ncopy crypto/asn1/a_mbstr.c:150
#6 0x7f2652e75ec5 in ASN1_mbstring_copy crypto/asn1/a_mbstr.c:38
#7 0x7f2652e8e227 in asn1_str2type crypto/asn1/asn1_gen.c:681
#8 0x7f2652e8e227 in generate_v3 crypto/asn1/asn1_gen.c:137
#9 0x7f2652e9166c in ASN1_generate_v3 crypto/asn1/asn1_gen.c:92
#10 0x7f2653307b9b in do_othername crypto/x509v3/v3_alt.c:577
#11 0x7f2653307b9b in a2i_GENERAL_NAME crypto/x509v3/v3_alt.c:492
#12 0x7f26533087c2 in v2i_subject_alt crypto/x509v3/v3_alt.c:327
#13 0x7f26533107fc in do_ext_nconf crypto/x509v3/v3_conf.c:100
#14 0x7f2653310f33 in X509V3_EXT_nconf crypto/x509v3/v3_conf.c:45
#15 0x7f2653311426 in X509V3_EXT_add_nconf_sk crypto/x509v3/v3_conf.c:312
#16 0x7f265331170c in X509V3_EXT_REQ_add_nconf crypto/x509v3/v3_conf.c:360
#17 0x564ed19d5f25 in req_main apps/req.c:806
#18 0x564ed19b8de0 in do_cmd apps/openssl.c:564
#19 0x564ed1985165 in main apps/openssl.c:183
#20 0x7f2651c4a082 in __libc_start_main ../csu/libc-start.c:308
Reviewed-by: Paul Yang <kaishen.yy@antfin.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23138)
|
||
|---|---|---|
| .ctags.d | ||
| .github | ||
| apps | ||
| cloudflare-quiche@7ab6a55cfe | ||
| Configurations | ||
| crypto | ||
| demos | ||
| dev | ||
| doc | ||
| engines | ||
| exporters | ||
| external/perl | ||
| fuzz | ||
| gost-engine@2a8a5e0eca | ||
| include | ||
| krb5@aa9b4a2a64 | ||
| ms | ||
| oqs-provider@8c746d7e29 | ||
| os-dep | ||
| providers | ||
| pyca-cryptography@7e33b0e773 | ||
| python-ecdsa@4de8d5bf89 | ||
| ssl | ||
| test | ||
| tlsfuzzer@dbd56c1490 | ||
| tlslite-ng@771e9f59d6 | ||
| tools | ||
| util | ||
| VMS | ||
| wycheproof@2196000605 | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| ACKNOWLEDGEMENTS.md | ||
| AUTHORS.md | ||
| build.info | ||
| CHANGES.md | ||
| CODE-OF-CONDUCT.md | ||
| config | ||
| config.com | ||
| configdata.pm.in | ||
| Configure | ||
| CONTRIBUTING.md | ||
| FAQ.md | ||
| HACKING.md | ||
| INSTALL.md | ||
| LICENSE.txt | ||
| NEWS.md | ||
| NOTES-ANDROID.md | ||
| NOTES-DJGPP.md | ||
| NOTES-NONSTOP.md | ||
| NOTES-PERL.md | ||
| NOTES-UNIX.md | ||
| NOTES-VALGRIND.md | ||
| NOTES-VMS.md | ||
| NOTES-WINDOWS.md | ||
| README-ENGINES.md | ||
| README-FIPS.md | ||
| README-PROVIDERS.md | ||
| README-QUIC.md | ||
| README.md | ||
| SUPPORT.md | ||
| VERSION.dat | ||
Welcome to the OpenSSL Project
OpenSSL is a robust, commercial-grade, full-featured Open Source Toolkit for the TLS (formerly SSL), DTLS and QUIC (currently client side only) protocols.
The protocol implementations are based on a full-strength general purpose cryptographic library, which can also be used stand-alone. Also included is a cryptographic module validated to conform with FIPS standards.
OpenSSL is descended from the SSLeay library developed by Eric A. Young and Tim J. Hudson.
The official Home Page of the OpenSSL Project is www.openssl.org.
Table of Contents
Overview
The OpenSSL toolkit includes:
-
libssl an implementation of all TLS protocol versions up to TLSv1.3 (RFC 8446), DTLS protocol versions up to DTLSv1.2 (RFC 6347) and the QUIC (currently client side only) version 1 protocol (RFC 9000).
-
libcrypto a full-strength general purpose cryptographic library. It constitutes the basis of the TLS implementation, but can also be used independently.
-
openssl the OpenSSL command line tool, a swiss army knife for cryptographic tasks, testing and analyzing. It can be used for
- creation of key parameters
- creation of X.509 certificates, CSRs and CRLs
- calculation of message digests
- encryption and decryption
- SSL/TLS/DTLS and client and server tests
- QUIC client tests
- handling of S/MIME signed or encrypted mail
- and more...
Download
For Production Use
Source code tarballs of the official releases can be downloaded from www.openssl.org/source. The OpenSSL project does not distribute the toolkit in binary form.
However, for a large variety of operating systems precompiled versions of the OpenSSL toolkit are available. In particular, on Linux and other Unix operating systems, it is normally recommended to link against the precompiled shared libraries provided by the distributor or vendor.
We also maintain a list of third parties that produce OpenSSL binaries for various Operating Systems (including Windows) on the Binaries page on our wiki.
For Testing and Development
Although testing and development could in theory also be done using the source tarballs, having a local copy of the git repository with the entire project history gives you much more insight into the code base.
The official OpenSSL Git Repository is located at git.openssl.org. There is a GitHub mirror of the repository at github.com/openssl/openssl, which is updated automatically from the former on every commit.
A local copy of the Git Repository can be obtained by cloning it from the original OpenSSL repository using
git clone git://git.openssl.org/openssl.git
or from the GitHub mirror using
git clone https://github.com/openssl/openssl.git
If you intend to contribute to OpenSSL, either to fix bugs or contribute new features, you need to fork the OpenSSL repository openssl/openssl on GitHub and clone your public fork instead.
git clone https://github.com/yourname/openssl.git
This is necessary because all development of OpenSSL nowadays is done via GitHub pull requests. For more details, see Contributing.
Build and Install
After obtaining the Source, have a look at the INSTALL file for detailed instructions about building and installing OpenSSL. For some platforms, the installation instructions are amended by a platform specific document.
- Notes for UNIX-like platforms
- Notes for Android platforms
- Notes for Windows platforms
- Notes for the DOS platform with DJGPP
- Notes for the OpenVMS platform
- Notes on Perl
- Notes on Valgrind
Specific notes on upgrading to OpenSSL 3.x from previous versions can be found in the ossl-guide-migration(7ossl) manual page.
Documentation
README Files
There are some README.md files in the top level of the source distribution containing additional information on specific topics.
- Information about the OpenSSL QUIC protocol implementation
- Information about the OpenSSL Provider architecture
- Information about using the OpenSSL FIPS validated module
- Information about the legacy OpenSSL Engine architecture
The OpenSSL Guide
There are some tutorial and introductory pages on some important OpenSSL topics within the OpenSSL Guide.
Manual Pages
The manual pages for the master branch and all current stable releases are available online.
Demos
The are numerous source code demos for using various OpenSSL capabilities in the demos subfolder.
Wiki
There is a Wiki at wiki.openssl.org which is currently not very active. It contains a lot of useful information, not all of which is up-to-date.
License
OpenSSL is licensed under the Apache License 2.0, which means that you are free to get and use it for commercial and non-commercial purposes as long as you fulfill its conditions.
See the LICENSE.txt file for more details.
Support
There are various ways to get in touch. The correct channel depends on your requirement. See the SUPPORT file for more details.
Contributing
If you are interested and willing to contribute to the OpenSSL project, please take a look at the CONTRIBUTING file.
Legalities
A number of nations restrict the use or export of cryptography. If you are potentially subject to such restrictions, you should seek legal advice before attempting to develop or distribute cryptographic code.
Copyright
Copyright (c) 1998-2023 The OpenSSL Project Authors
Copyright (c) 1995-1998 Eric A. Young, Tim J. Hudson
All rights reserved.