Re: Is this not supposed to work in OpenSSL 3.0.x+?

On 11/05/2025 20:55, Karl Denninger wrote:
> [karl@NewFS ~/tmp]$ cat test.c
> #include <stdio.h>
> #include <string.h>
> #include <openssl/evp.h>
> #include <openssl/hmac.h>
> 
> int main() {
>      const char *key = "secretkey";
>      const char *msg = "This is the message";
>      unsigned char hmac_result[EVP_MAX_MD_SIZE];
>      unsigned int hmac_len;
> 
>      HMAC(EVP_sha256(), key, strlen(key), (unsigned char*)msg, 
> strlen(msg), hmac_result, &hmac_len);
> 
>      printf("HMAC-SHA256: ");
>      for (int i = 0; i < hmac_len; i++) {
>          printf("%02x", hmac_result[i]);
>      }
>      printf("\n");
> 
>      return 0;
> }
> 
> [karl@NewFS ~/tmp]$ cc -o test test.c -lssl

The following seems to work:

$ cc -lcrypto -o test test.c


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