diff options
Diffstat (limited to 'libpam')
| -rw-r--r-- | libpam/include/pam_inline.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/libpam/include/pam_inline.h b/libpam/include/pam_inline.h index cf04c9af..a5aceb8a 100644 --- a/libpam/include/pam_inline.h +++ b/libpam/include/pam_inline.h @@ -175,4 +175,18 @@ pam_read_passwords(int fd, int npass, char **passwords) return i; } +static inline int +pam_consttime_streq(const char *userinput, const char *secret) { + volatile const char *u = userinput, *s = secret; + volatile int ret = 0; + + do { + ret |= *u ^ *s; + + s += !!*s; + } while (*u++ != '\0'); + + return ret == 0; +} + #endif /* PAM_INLINE_H */ |