Add crypto_aead_aes256gcm_aesni_is_available()

src/libsodium/crypto_aead/aes256gcm/aesni/aead_aes256gcm_aesni.c

@@ -9,6 +9,7 @@
 
 #include "crypto_aead_aes256gcm_aesni.h"
 #include "export.h"
+#include "runtime.h"
 #include "utils.h"
 
 #if defined(HAVE_WMMINTRIN_H) || \
@@ -798,6 +799,12 @@ crypto_aead_aes256gcm_aesni_decrypt(unsigned char *m,
         (m, mlen_p, nsec, c, clen, ad, adlen, npub, &ctx);
 }
 
+int
+crypto_aead_aes256gcm_aesni_is_available(void)
+{
+    return sodium_runtime_has_pclmul() & sodium_runtime_has_aesni();
+}
+
 size_t
 crypto_aead_aes256gcm_keybytes(void)
 {
@@ -828,4 +835,12 @@ crypto_aead_aes256gcm_statebytes(void)
     return sizeof(crypto_aead_aes256gcm_state);
 }
 
+#else
+
+int
+crypto_aead_aes256gcm_aesni_is_available(void)
+{
+    return 0;
+}
+
 #endif

src/libsodium/include/sodium/crypto_aead_aes256gcm_aesni.h

@@ -11,6 +11,9 @@
 extern "C" {
 #endif
 
+SODIUM_EXPORT
+int crypto_aead_aes256gcm_aesni_is_available(void);
+
 #define crypto_aead_aes256gcm_KEYBYTES  32U
 SODIUM_EXPORT
 size_t crypto_aead_aes256gcm_keybytes(void);

test/default/aead_aes256gcm.c

@@ -3095,7 +3095,7 @@ tv(void)
 int
 main(void)
 {
-    if (sodium_runtime_has_aesni() && sodium_runtime_has_pclmul()) {
+    if (crypto_aead_aes256gcm_aesni_is_available()) {
         tv();
     }
     printf("OK\n");