diff options
| -rw-r--r-- | lasso/utils.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/lasso/utils.h b/lasso/utils.h index 0a58271c..465f4b6a 100644 --- a/lasso/utils.h +++ b/lasso/utils.h @@ -685,4 +685,24 @@ lasso_xmlstrisnotequal(const xmlChar *a, const xmlChar *b) { return lasso_strisnotequal((char*)a, (char*)b); } +/** + * lasso_crypto_memequal: + * @a: first buffer + * @b: second buffer + * @l: common length + * + * Compare two buffers, preventing timing attacks. + */ +static inline gboolean +lasso_crypto_memequal(void *a, void *b, unsigned int l) +{ + unsigned char *x = a, *y = b; + gboolean result = TRUE; + + for (;l;l--, x++, y++) { + result = result && (*x == *y); + } + return result; +} + #endif /* __LASSO_UTILS_H__ */ |