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Diffstat (limited to 'include/mbedtls/constant_time.h')
-rw-r--r-- | include/mbedtls/constant_time.h | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/include/mbedtls/constant_time.h b/include/mbedtls/constant_time.h deleted file mode 100644 index d31bff6..0000000 --- a/include/mbedtls/constant_time.h +++ /dev/null @@ -1,36 +0,0 @@ -/** - * Constant-time functions - */ -/* - * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later - */ - -#ifndef MBEDTLS_CONSTANT_TIME_H -#define MBEDTLS_CONSTANT_TIME_H - -#include <stddef.h> - -/** Constant-time buffer comparison without branches. - * - * This is equivalent to the standard memcmp function, but is likely to be - * compiled to code using bitwise operations rather than a branch, such that - * the time taken is constant w.r.t. the data pointed to by \p a and \p b, - * and w.r.t. whether \p a and \p b are equal or not. It is not constant-time - * w.r.t. \p n . - * - * This function can be used to write constant-time code by replacing branches - * with bit operations using masks. - * - * \param a Pointer to the first buffer, containing at least \p n bytes. May not be NULL. - * \param b Pointer to the second buffer, containing at least \p n bytes. May not be NULL. - * \param n The number of bytes to compare. - * - * \return Zero if the contents of the two buffers are the same, - * otherwise non-zero. - */ -int mbedtls_ct_memcmp(const void *a, - const void *b, - size_t n); - -#endif /* MBEDTLS_CONSTANT_TIME_H */ |