Compiling for PE and IMPHASH - Openssl

[wizardlevel9]

Linux Build (Debian 9, Debian 10 and Ubuntu 20.04)
When following the instructions to use ./configure --without-crypto
Result = Not being able to use rules with HASH and/or IMPHASH.

I have sucessfully compiled yara with cryto enabled but when i try to compile kraken, I get multiple errors, which i belive are associated with linking to openssl libraries:

/usr/bin/ld: /usr/local/lib/libyara.a(pe.o): in function imphash': pe.c:(.text+0x11ee): undefined reference to MD5_Init'

Is there a way to resolve this, so i can use PE and IMHASH yara rules?

NOTE: I'm also using yara 4.0.1. When I use the same signatures on my MacOS (using the instructions you provided), it builds successfully and I can use rules with HASH and IMPHASH.

When I follow the instructions you provided but use rules with PE and IMPASH I get this when I try to compile using:
BACKEND=test.com RULES=signature-base/yara/ make linux

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x4b2b42]

goroutine 1 [running]:
github.com/hillu/go-yara/v4.(*Rules).Save.func2(0x0, 0xf368c0, 0xf368c0)
/root/go/pkg/mod/github.com/hillu/go-yara/v4@v4.0.2/rules.go:184 +0x22
github.com/hillu/go-yara/v4.(*Rules).Save(0x0, 0x4e234d, 0x5, 0x0, 0x0)
/root/go/pkg/mod/github.com/hillu/go-yara/v4@v4.0.2/rules.go:184 +0x8c
main.main()
/root/kraken/compiler/main.go:78 +0x16f
make: *** [Makefile:38: rules-compiler] Error 2

It might also be that the linux build does not include hash as a module during "make", whilst in the other builds (MacOS and Windows), hash is made as a module.

Any help you can provide to help me get this working on Linux would be greatly appreciated.

Thanks in advance.

[Hilko Bengen]

On Windows, getting rid of --without-crypto should do the trick because YARA can use Windows CryptoAPI for the hash functions. (The only thing that is going to be missing in that case are the Authenticode-related signature functions.)

[N0body]

On Windows, getting rid of --without-crypto should do the trick because YARA can use Windows CryptoAPI for the hash functions. (The only thing that is going to be missing in that case are the Authenticode-related signature functions.)

Hello, I met the same problem.When I built on Ubuntu 20.04, I got the errors like followings. I also followed the instructions to use ./configure --without-crypto. Could you give me some advice to fix this problem? Thanks in advance.
Errors:
/usr/local/go/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
/usr/bin/ld: /usr/local/lib/libyara.a(pe.o): in function imphash': pe.c:(.text+0x11ee): undefined reference to MD5_Init'
/usr/bin/ld: pe.c:(.text+0x135a): undefined reference to MD5_Update' /usr/bin/ld: pe.c:(.text+0x13b2): undefined reference to MD5_Final'
/usr/bin/ld: /usr/local/lib/libyara.a(pe.o): in function _parse_pkcs7': pe.c:(.text+0x2c6c): undefined reference to EVP_sha1'
/usr/bin/ld: pe.c:(.text+0x2cac): undefined reference to PKCS7_get0_signers' /usr/bin/ld: pe.c:(.text+0x2ce6): undefined reference to OPENSSL_sk_num'
/usr/bin/ld: pe.c:(.text+0x2d0c): undefined reference to OPENSSL_sk_value' ... /usr/bin/ld: /usr/local/lib/libyara.a(hash.o): in function data_md5':
hash.c:(.text+0x115c): undefined reference to MD5_Init' /usr/bin/ld: hash.c:(.text+0x1329): undefined reference to MD5_Update'
/usr/bin/ld: hash.c:(.text+0x13ee): undefined reference to MD5_Final' /usr/bin/ld: /usr/local/lib/libyara.a(hash.o): in function data_sha1':
hash.c:(.text+0x1594): undefined reference to SHA1_Init' /usr/bin/ld: hash.c:(.text+0x1757): undefined reference to SHA1_Update'
/usr/bin/ld: hash.c:(.text+0x180e): undefined reference to `SHA1_Final'
collect2: error: ld returned 1 exit status

[Hilko Bengen]

@Jacob-Dong I cannot tell you anything other than to remove the --without-crypto switch. And you'll have to rebuild YARA, of course. (The Makefile does not take care of that automatically.)

[N0body]

I cannot tell you anything other than to remove the --without-crypto switch. And you'll have to rebuild YARA, of course. (The Makefile does not take care of that automatically.

Thank you for your reply.I have fixed this problem.The reason why I got this error is that I didn't get the envionment variables right.