Building althttpd ssl errors

(1) By jose i cabrera (jicman) on 2022-05-22 02:57:25 [link] [source]

Greetings.

I am trying to build althttpd (althttpd-b8db19fe7e.zip) with this command,

jic@web:~/b/althttpd-b8db19fe7e$ sudo gcc -Os -o /usr/bin/althttpd -fPIC -DENABLE_TLS -lssl -lcrypto althttpd.c
althttpd.c:422:10: fatal error: openssl/bio.h: No such file or directory
  422 | #include <openssl/bio.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.

As you can see I am probably missing some libraries. I am running,

Linux web 5.4.0-110-generic #124-Ubuntu SMP Thu Apr 14 19:46:19 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

Any help would be greatly appreciated. Thanks.

josé

(2) By Stephan Beal (stephan) on 2022-05-22 13:30:08 in reply to 1 [link] [source]

As you can see I am probably missing some libraries

On Ubuntu-derived systems:

$ sudo apt install libssl-dev

(3) By jose i cabrera (jicman) on 2022-05-22 22:26:50 in reply to 2 [link] [source]

Thanks, libsse-dev installed:

jic@web:~/b/althttpd-b8db19fe7e$ sudo apt install libssl-dev
[sudo] password for jic:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  libssl-doc
The following NEW packages will be installed:
  libssl-dev
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,584 kB of archives.
After this operation, 8,009 kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 libssl-dev amd64 1.1.1f-1ubuntu2.13 [1,584 kB]
Fetched 1,584 kB in 1s (2,225 kB/s)
Selecting previously unselected package libssl-dev:amd64.
(Reading database ... 116348 files and directories currently installed.)
Preparing to unpack .../libssl-dev_1.1.1f-1ubuntu2.13_amd64.deb ...
Unpacking libssl-dev:amd64 (1.1.1f-1ubuntu2.13) ...
Setting up libssl-dev:amd64 (1.1.1f-1ubuntu2.13) ...

Now, I get a different error,

jic@web:~/b/althttpd-b8db19fe7e$ sudo gcc -Os -o /usr/bin/althttpd -fPIC -DENABLE_TLS -lssl -lcrypto althttpd.c
/usr/bin/ld: /tmp/ccCQFMfJ.o: in function `tls_atexit':
althttpd.c:(.text+0x89): undefined reference to `SSL_free'
/usr/bin/ld: /tmp/ccCQFMfJ.o: in function `tls_write_server':
althttpd.c:(.text+0xbf2): undefined reference to `SSL_write'
/usr/bin/ld: althttpd.c:(.text+0xc00): undefined reference to `SSL_get_error'
/usr/bin/ld: /tmp/ccCQFMfJ.o: in function `althttpd_fgets.constprop.0':
althttpd.c:(.text+0x16e4): undefined reference to `BIO_ctrl'
/usr/bin/ld: althttpd.c:(.text+0x16ff): undefined reference to `SSL_read'
/usr/bin/ld: althttpd.c:(.text+0x170d): undefined reference to `SSL_get_error'
/usr/bin/ld: /tmp/ccCQFMfJ.o: in function `ProcessOneRequest':
althttpd.c:(.text+0x20e5): undefined reference to `BIO_new_socket'
/usr/bin/ld: althttpd.c:(.text+0x211d): undefined reference to `SSL_new'
/usr/bin/ld: althttpd.c:(.text+0x2136): undefined reference to `SSL_set_bio'
/usr/bin/ld: althttpd.c:(.text+0x213e): undefined reference to `SSL_accept'
/usr/bin/ld: althttpd.c:(.text+0x29dd): undefined reference to `BIO_ctrl'
/usr/bin/ld: althttpd.c:(.text+0x29f2): undefined reference to `SSL_read'
/usr/bin/ld: althttpd.c:(.text+0x2a03): undefined reference to `SSL_get_error'
/usr/bin/ld: /tmp/ccCQFMfJ.o: in function `main':
althttpd.c:(.text.startup+0x603): undefined reference to `OPENSSL_init_ssl'
/usr/bin/ld: althttpd.c:(.text.startup+0x60f): undefined reference to `OPENSSL_init_ssl'
/usr/bin/ld: althttpd.c:(.text.startup+0x61b): undefined reference to `OPENSSL_init_crypto'
/usr/bin/ld: althttpd.c:(.text.startup+0x620): undefined reference to `TLS_server_method'
/usr/bin/ld: althttpd.c:(.text.startup+0x628): undefined reference to `SSL_CTX_new'
/usr/bin/ld: althttpd.c:(.text.startup+0x648): undefined reference to `ERR_print_errors_fp'
/usr/bin/ld: althttpd.c:(.text.startup+0x67f): undefined reference to `SSL_CTX_use_certificate_chain_file'
/usr/bin/ld: althttpd.c:(.text.startup+0x692): undefined reference to `ERR_print_errors_fp'
/usr/bin/ld: althttpd.c:(.text.startup+0x6c1): undefined reference to `SSL_CTX_use_PrivateKey_file'
/usr/bin/ld: althttpd.c:(.text.startup+0x6d8): undefined reference to `ERR_print_errors_fp'
/usr/bin/ld: althttpd.c:(.text.startup+0x70c): undefined reference to `BIO_new_mem_buf'
/usr/bin/ld: althttpd.c:(.text.startup+0x71f): undefined reference to `X509_new'
/usr/bin/ld: althttpd.c:(.text.startup+0x73c): undefined reference to `PEM_read_bio_X509'
/usr/bin/ld: althttpd.c:(.text.startup+0x750): undefined reference to `SSL_CTX_use_certificate'
/usr/bin/ld: althttpd.c:(.text.startup+0x765): undefined reference to `X509_free'
/usr/bin/ld: althttpd.c:(.text.startup+0x76f): undefined reference to `BIO_free'
/usr/bin/ld: althttpd.c:(.text.startup+0x7a3): undefined reference to `BIO_new_mem_buf'
/usr/bin/ld: althttpd.c:(.text.startup+0x7be): undefined reference to `PEM_read_bio_PrivateKey'
/usr/bin/ld: althttpd.c:(.text.startup+0x7e1): undefined reference to `SSL_CTX_use_PrivateKey'
/usr/bin/ld: althttpd.c:(.text.startup+0x7f3): undefined reference to `EVP_PKEY_free'
/usr/bin/ld: althttpd.c:(.text.startup+0x800): undefined reference to `BIO_free'
/usr/bin/ld: althttpd.c:(.text.startup+0x826): undefined reference to `SSL_CTX_check_private_key'
/usr/bin/ld: althttpd.c:(.text.startup+0x859): undefined reference to `SSL_CTX_ctrl'
collect2: error: ld returned 1 exit status
jic@web:~/b/althttpd-b8db19fe7e$

Any thoughts?

jose

(4.1) By Stephan Beal (stephan) on 2022-05-23 00:16:04 edited from 4.0 in reply to 3 [link] [source]

althttpd.c:(.text+0x89): undefined reference to `SSL_free'

~~i'm wondering whether that's possibly openssl 3.x, which deprecated/removed some things. Can you post the output of:~~

apt show openssl | grep Version

~~My Mint 20.3 system has openssl 1.1, but Ubuntu 22.04 "upgraded" to 3.x (and broke my mail server by doing so).~~

If you have openssl 3.0 and that's the problem then i don't have a quick fix for you. We'll have to (in this project and its sibling, the Fossil SCM) figure out how to rewrite the SSL bits for the changes.

Edit: the ssl version (1.1) was in the output of your installation and i missed.

or...

sudo gcc -Os -o /usr/bin/althttpd -fPIC -DENABLE_TLS -lssl -lcrypto althttpd.c

Don't use sudo for compiling. That might be causing it to use a different library path than your user account would. Instead try:

gcc -Os -o althttpd -fPIC -DENABLE_TLS -lssl -lcrypto althttpd.c

And if that works then move the binary:

sudo mv althttpd /usr/bin/.
sudo chown root:root /usr/bin/althttpd

(5) By jose i cabrera (jicman) on 2022-05-22 23:45:43 in reply to 4.0 [link] [source]

i'm wondering whether that's possibly openssl 3.x, which deprecated/removed some things. Can you post the output of:

apt show openssl grep Version

jic@web:~/b/althttpd-b8db19fe7e$ apt show openssl | grep Version

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Version: 1.1.1f-1ubuntu2.13

I am going to reboot to see if that WARNING goes way. I will also try to compile it without the sudo. That could also be the problem: the compiler is looking at the wrong library.

I will return..,

(6) By jose i cabrera (jicman) on 2022-05-23 01:08:09 in reply to 4.1 [link] [source]

Don't use sudo for compiling. That might be causing it to use a different library path than your user account would. Instead try:

gcc -Os -o althttpd -fPIC -DENABLE_TLS -lssl -lcrypto althttpd.c

I get:

jic@web:~/b/althttpd-b8db19fe7e$ gcc -Os -o althttpd -fPIC -DENABLE_TLS -lssl -lcrypto althttpd.c
/usr/bin/ld: /tmp/ccr9I60V.o: in function `tls_atexit':
althttpd.c:(.text+0x89): undefined reference to `SSL_free'
/usr/bin/ld: /tmp/ccr9I60V.o: in function `tls_write_server':
althttpd.c:(.text+0xbf2): undefined reference to `SSL_write'
/usr/bin/ld: althttpd.c:(.text+0xc00): undefined reference to `SSL_get_error'
/usr/bin/ld: /tmp/ccr9I60V.o: in function `althttpd_fgets.constprop.0':
althttpd.c:(.text+0x16e4): undefined reference to `BIO_ctrl'
/usr/bin/ld: althttpd.c:(.text+0x16ff): undefined reference to `SSL_read'
/usr/bin/ld: althttpd.c:(.text+0x170d): undefined reference to `SSL_get_error'
/usr/bin/ld: /tmp/ccr9I60V.o: in function `ProcessOneRequest':
althttpd.c:(.text+0x20e5): undefined reference to `BIO_new_socket'
/usr/bin/ld: althttpd.c:(.text+0x211d): undefined reference to `SSL_new'
/usr/bin/ld: althttpd.c:(.text+0x2136): undefined reference to `SSL_set_bio'
/usr/bin/ld: althttpd.c:(.text+0x213e): undefined reference to `SSL_accept'
/usr/bin/ld: althttpd.c:(.text+0x29dd): undefined reference to `BIO_ctrl'
/usr/bin/ld: althttpd.c:(.text+0x29f2): undefined reference to `SSL_read'
/usr/bin/ld: althttpd.c:(.text+0x2a03): undefined reference to `SSL_get_error'
/usr/bin/ld: /tmp/ccr9I60V.o: in function `main':
althttpd.c:(.text.startup+0x603): undefined reference to `OPENSSL_init_ssl'
/usr/bin/ld: althttpd.c:(.text.startup+0x60f): undefined reference to `OPENSSL_init_ssl'
/usr/bin/ld: althttpd.c:(.text.startup+0x61b): undefined reference to `OPENSSL_init_crypto'
/usr/bin/ld: althttpd.c:(.text.startup+0x620): undefined reference to `TLS_server_method'
/usr/bin/ld: althttpd.c:(.text.startup+0x628): undefined reference to `SSL_CTX_new'
/usr/bin/ld: althttpd.c:(.text.startup+0x648): undefined reference to `ERR_print_errors_fp'
/usr/bin/ld: althttpd.c:(.text.startup+0x67f): undefined reference to `SSL_CTX_use_certificate_chain_file'
/usr/bin/ld: althttpd.c:(.text.startup+0x692): undefined reference to `ERR_print_errors_fp'
/usr/bin/ld: althttpd.c:(.text.startup+0x6c1): undefined reference to `SSL_CTX_use_PrivateKey_file'
/usr/bin/ld: althttpd.c:(.text.startup+0x6d8): undefined reference to `ERR_print_errors_fp'
/usr/bin/ld: althttpd.c:(.text.startup+0x70c): undefined reference to `BIO_new_mem_buf'
/usr/bin/ld: althttpd.c:(.text.startup+0x71f): undefined reference to `X509_new'
/usr/bin/ld: althttpd.c:(.text.startup+0x73c): undefined reference to `PEM_read_bio_X509'
/usr/bin/ld: althttpd.c:(.text.startup+0x750): undefined reference to `SSL_CTX_use_certificate'
/usr/bin/ld: althttpd.c:(.text.startup+0x765): undefined reference to `X509_free'
/usr/bin/ld: althttpd.c:(.text.startup+0x76f): undefined reference to `BIO_free'
/usr/bin/ld: althttpd.c:(.text.startup+0x7a3): undefined reference to `BIO_new_mem_buf'
/usr/bin/ld: althttpd.c:(.text.startup+0x7be): undefined reference to `PEM_read_bio_PrivateKey'
/usr/bin/ld: althttpd.c:(.text.startup+0x7e1): undefined reference to `SSL_CTX_use_PrivateKey'
/usr/bin/ld: althttpd.c:(.text.startup+0x7f3): undefined reference to `EVP_PKEY_free'
/usr/bin/ld: althttpd.c:(.text.startup+0x800): undefined reference to `BIO_free'
/usr/bin/ld: althttpd.c:(.text.startup+0x826): undefined reference to `SSL_CTX_check_private_key'
/usr/bin/ld: althttpd.c:(.text.startup+0x859): undefined reference to `SSL_CTX_ctrl'
collect2: error: ld returned 1 exit status

Any thoughts? Thanks.

jose

(7) By Stephan Beal (stephan) on 2022-05-23 01:14:07 in reply to 6 [link] [source]

Any thoughts?

Yes: don't run gcc manually ;). Run "make" instead. When i run gcc using the commands you did, i get the same error. Running make does the right thing, though.

The difference is in the order of the -l flags: those must come after the .c file:

$ gcc -Os -o althttpd -fPIC -DENABLE_TLS althttpd.c -lssl -lcrypto

will work for you.

(8) By jose i cabrera (jicman) on 2022-05-23 01:24:20 in reply to 7 [source]

Thanks. Both make and the command you provided above worked. I now have built althttpd. The documentation should be fixed because it has this command to build with ssl:

To build althttpd with built-in TLS support using libssl:

gcc -Os -o /usr/bin/althttpd -fPIC -DENABLE_TLS -lssl -lcrypto \
althttpd.c

This is what gives the error. Thanks for the help.

josé