X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fcrypto.h;h=f92fc5182d9e92f6488997db45d117f0cc1a40b2;hp=61605769bb2b3d2016d156ee5f39f27aed832d24;hb=55614f89f0beb53ebafbfc680cf7b4d114b44d30;hpb=af454b5bb09bf647b4854dc277f2eefc151b2608

diff --git a/crypto/crypto.h b/crypto/crypto.h
index 61605769bb..f92fc5182d 100644
--- a/crypto/crypto.h
+++ b/crypto/crypto.h
@@ -574,6 +574,13 @@ void OPENSSL_init(void);
 #define fips_cipher_abort(alg) while(0)
 #endif
 
+/* CRYPTO_memcmp returns zero iff the |len| bytes at |a| and |b| are equal. It
+ * takes an amount of time dependent on |len|, but independent of the contents
+ * of |a| and |b|. Unlike memcmp, it cannot be used to put elements into a
+ * defined order as the return value when a != b is undefined, other than to be
+ * non-zero. */
+int CRYPTO_memcmp(const void *a, const void *b, size_t len);
+
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.