Hey all, I'm new to openssl community and I don't know much about it. I tried to use openssl on my linux machine. I clone openssl git repo and executed these commands as mentioned in the file "INSTALL": "./config", "make", "make test", "make install". It went alright. Then I tried an "EVP KEY Derivation" example from this link: https://wiki.openssl.org/index.php?title=EVP_Key_Derivation&redirect=no#targetText=HKDF%20was%20designed%20by%20Krawczyk,from%20the%20OpenSSL%20man%20pages. But it gives me some error for undeclared function. ~/openssl$ gcc -std=c99 test.c -o test.exe -l:libcrypto.a -pthread -ldl test.c: In function ‘main’: test.c:12:17: warning: implicit declaration of function ‘EVP_KDF_CTX_new_id’; did you mean ‘EVP_KDF_CTX_new’? [-Wimplicit-function-declaration] if ((kctx = EVP_KDF_CTX_new_id(EVP_KDF_HKDF)) == NULL) { ^~~~~~~~~~~~~~~~~~ EVP_KDF_CTX_new test.c:12:36: error: ‘EVP_KDF_HKDF’ undeclared (first use in this function); did you mean ‘EVP_PKEY_HKDF’? if ((kctx = EVP_KDF_CTX_new_id(EVP_KDF_HKDF)) == NULL) { ^~~~~~~~~~~~ EVP_PKEY_HKDF test.c:12:36: note: each undeclared identifier is reported only once for each function it appears in test.c:13:9: warning: implicit declaration of function ‘error’; did you mean ‘perror’? [-Wimplicit-function-declaration] error("EVP_KDF_CTX_new_id"); ^~~~~ perror test.c:15:9: warning: implicit declaration of function ‘EVP_KDF_ctrl’; did you mean ‘EVP_KDF_size’? [-Wimplicit-function-declaration] if (EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_MD, EVP_sha256()) <= 0) { ^~~~~~~~~~~~ EVP_KDF_size
Is there any problem with the installation or am I missing something else? Your help is much appreciated. Thanks & Regards, Bhuvan Sharma
