openssl-1_1/showciphers.c

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#include <openssl/err.h>
#include <openssl/ssl.h>
int main() {
SSL_CTX *ctx = NULL;
SSL *ssl = NULL;
STACK_OF(SSL_CIPHER) *sk = NULL;
const SSL_METHOD *meth = TLS_server_method();
int i;
const char *p;
ctx = SSL_CTX_new(meth);
if (ctx == NULL)
return 1;
ssl = SSL_new(ctx);
if (ssl == NULL)
return 1;
sk = SSL_get_ciphers(ssl);
for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
const SSL_CIPHER *c = sk_SSL_CIPHER_value(sk, i);
p = SSL_CIPHER_get_name(c);
if (p == NULL)
break;
printf("%s\n", p);
}
return 0;
}