Add function for pub key extraction #68
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There was no function to retreive the public key from the private key. This change adds this functionality and a test for it.
wusto
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Jan 11, 2023
This commit adds dilithium as algorithm for signing and verification. As openssl is not supporting dilithium at the moment, the reference implementation from the NIST PQC is used (see https://github.com/pq-crystals/dilithium/). The crystalls dilithium libraries without avx support are used. The current version of MoCOCrW uses a EVP_PKEY centric implementation for asymmetric cryptographic operations. To avoid changes on the existing classes the relevant classes are cloned for dilithium. Functionality is added or removed wherever necessary. But the changes were done with the plan in mind, to be able to change back to the EVP_PKEY centric implementation once openssl supports dilithium. The new dilithium feature is OPTIONAL. To compile MoCOCrW with dilithium support specify -DDILITHIUM_ENABLED when invoking cmake. You have to make sure, that the static libraries created by libdilithium (https://github.com/pq-crystals/dilithium) can be found the linker. Additionally the compiler needs access to "api.h" from libdilithium. To be compliant to the current implementation an additional function to retrieve the public key from the private key for dilithium is added to libdilithium (pq-crystals/dilithium#68). This one is required for compilation. If you have problems compiling and installing libdillithium there is another PR which enhances cmake for libdilithium (pq-crystals/dilithium#69). The following openssl functions are required for the implementation and were consequently added: * d2i_X509_PUBKEY (reading ASN.1 pubkey structures) * X509_PUBKEY_free (freeing the memory) * ASN1_INTEGER_get_int64 (modern function for ASN1_INTEGER_get) * d2i_PKCS8_PRIV_KEY_INFO (reading RFC 5958 DER data) * PKCS8_PRIV_KEY_INFO_free (free it)
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There was no function to retreive the public key from the private key.
This change adds this functionality and a test for it.