Hi all, Context: https://github.com/zyrolasting/xiden/blob/master/crypto/crypto.c I compile this small EVP program into a dynamic library, in which libcrypto is statically linked. A nearby Racket program needs this dynamic library for a foreign function interface. I do things in an odd order, but I am able to create and verify signatures with this setup. Let's say the library's output signature is in file.sha1.sig, and the signature was created using the unencoded SHA-1 digest in file.sha1. I would compare verification output using my host 1.1.1f binary using: $ <file.sha1 openssl pkeyutl -sign -verify -pubin -inkey public.pem -sigfile file.sha1.sig Signature verification fails, so I made a mistake. I'm confused because the program still (broadly) follows the wiki, and it verifies its own valid-looking signatures successfully. Can the library and binary disagree because of different OpenSSL versions? If not, what did I do to make them produce different output for the same CHF and keypair? -- ~slg
