crypto_pwhash_scryptsalsa* undefined reference

[joshjdevl]

Recently started receiving many crypto_pwhash_scryptsalsa* undefined reference errors. Did something change recently?

Build error

/home/travis/build/joshjdevl/libsodium-jni/build/intermediates/ndkBuild/debug/obj/local/mips64/objs-debug/sodiumjni/sodium_wrap.o: In function Java_org_libsodium_jni_SodiumJNI_crypto_1pwhash_1scryptsalsa208sha256_1saltbytes': /home/travis/build/joshjdevl/libsodium-jni/jni/sodium_wrap.c:5851: undefined reference to crypto_pwhash_scryptsalsa208sha256_saltbytes'
/home/travis/build/joshjdevl/libsodium-jni/build/intermediates/ndkBuild/debug/obj/local/mips64/objs-debug/sodiumjni/sodium_wrap.o: In function Java_org_libsodium_jni_SodiumJNI_crypto_1pwhash_1scryptsalsa208sha256_1strbytes': /home/travis/build/joshjdevl/libsodium-jni/jni/sodium_wrap.c:5863: undefined reference to crypto_pwhash_scryptsalsa208sha256_strbytes'
/home/travis/build/joshjdevl/libsodium-jni/build/intermediates/ndkBuild/debug/obj/local/mips64/objs-debug/sodiumjni/sodium_wrap.o: In function Java_org_libsodium_jni_SodiumJNI_crypto_1pwhash_1scryptsalsa208sha256_1strprefix': /home/travis/build/joshjdevl/libsodium-jni/jni/sodium_wrap.c:5875: undefined reference to crypto_pwhash_scryptsalsa208sha256_strprefix'
/home/travis/build/joshjdevl/libsodium-jni/build/intermediates/ndkBuild/debug/obj/local/mips64/objs-debug/sodiumjni/sodium_wrap.o: In function Java_org_libsodium_jni_SodiumJNI_crypto_1pwhash_1scryptsalsa208sha256_1opslimit_1interactive': /home/travis/build/joshjdevl/libsodium-jni/jni/sodium_wrap.c:5887: undefined reference to crypto_pwhash_scryptsalsa208sha256_opslimit_interactive'

[jedisct1]

Hi!

Libsodium-JNI is a distinct project: https://github.com/joshjdevl/libsodium-jni

I've never used it and I don't know much about Java and Android, so you'd better ask on their project page.

scrypt is not available any more when libsodium is compiled in minimal mode, so maybe this is related.

[joshjdevl]

Well, I am the maintainer of Libsodium-jni, hence my question as to what changed when trying to build and include the scrypt related functions.

I did not find much in the changelog? I will try then without the minimal mode and see.

[jedisct1]

Low-level functions that are not used by any high-level APIs are not present in minimal mode, and may eventually become deprecated and removed.

We were waiting for the outcome of the password hashing competition to add the final high-level API and the first algorithms it would use, which were bound to not include scrypt.

crypto_pwhash is the high-level API for password hashing that bindings such as libsodium-jni should use should use, if only because it exposes a unified interface for all algorithms.

As size and speed are important to these devices, Android & iOS builds have always used the minimal mode. But maybe a switch can be added to the build scripts to include deprecated and undocumented functions, and the ones not used by the high-level APIs (similar to "sumo" builds in Javascript).

[jedisct1]

If it can help, there is also a SODIUM_LIBRARY_MINIMAL macro, which is defined on minimal builds (and removes prototypes of nonexistent functions, when you include sodium.h).