Do not include pbkdf2 prototype in header if code is not compiled in.

diff --git a/lib/crypto_backend/crypto_backend.h b/lib/crypto_backend/crypto_backend.h
index d6f8677..32a5976 100644 (file)
--- a/lib/crypto_backend/crypto_backend.h
+++ b/lib/crypto_backend/crypto_backend.h
@@ -67,12 +67,14 @@ int crypt_pbkdf(const char *kdf, const char *hash,
                char *key, size_t key_length,
                unsigned int iterations);
 
+#if USE_INTERNAL_PBKDF2
 /* internal PBKDF2 implementation */
 int pkcs5_pbkdf2(const char *hash,
                 const char *P, size_t Plen,
                 const char *S, size_t Slen,
                 unsigned int c,
                 unsigned int dkLen,char *DK);
+#endif
 
 /* CRC32 */
 uint32_t crypt_crc32(uint32_t seed, const unsigned char *buf, size_t len);