evp/e_aes_cbc_hmac_sha*.c: harmonize names, fix bugs.

[openssl.git] / crypto / crypto.h

diff --git a/crypto/crypto.h b/crypto/crypto.h
index d3da3c881f57240247dcedb991dbc775f2b4ed3a..3a43803a1ed34fffa3362d52c7e4ecdfa6c590fd 100644 (file)
--- a/crypto/crypto.h
+++ b/crypto/crypto.h
@@ -567,6 +567,13 @@ int FIPS_mode_set(int r);
 
 void OPENSSL_init(void);
 
+/* 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.