diff options
Diffstat (limited to 'libpam/include/pam_inline.h')
| -rw-r--r-- | libpam/include/pam_inline.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libpam/include/pam_inline.h b/libpam/include/pam_inline.h index ec05fe43..8040b865 100644 --- a/libpam/include/pam_inline.h +++ b/libpam/include/pam_inline.h @@ -10,6 +10,8 @@ #include "pam_cc_compat.h" #include <string.h> +#include <unistd.h> +#include <errno.h> /* * Evaluates to @@ -64,4 +66,52 @@ pam_str_skip_icase_prefix_len(const char *str, const char *prefix, size_t prefix #define pam_str_skip_icase_prefix(str_, prefix_) \ pam_str_skip_icase_prefix_len((str_), (prefix_), sizeof(prefix_) - 1 + PAM_MUST_BE_ARRAY(prefix_)) +static inline int +pam_read_passwords(int fd, int npass, char **passwords) +{ + /* + * The passwords array must contain npass preallocated + * buffers of length PAM_MAX_RESP_SIZE + 1. + */ + int rbytes = 0; + int offset = 0; + int i = 0; + char *pptr; + while (npass > 0) { + rbytes = read(fd, passwords[i]+offset, PAM_MAX_RESP_SIZE+1-offset); + + if (rbytes < 0) { + if (errno == EINTR) { + continue; + } + break; + } + if (rbytes == 0) { + break; + } + + while (npass > 0 && (pptr=memchr(passwords[i]+offset, '\0', rbytes)) + != NULL) { + rbytes -= pptr - (passwords[i]+offset) + 1; + i++; + offset = 0; + npass--; + if (rbytes > 0) { + if (npass > 0) { + memcpy(passwords[i], pptr+1, rbytes); + } + memset(pptr+1, '\0', rbytes); + } + } + offset += rbytes; + } + + /* clear up */ + if (offset > 0 && npass > 0) { + memset(passwords[i], '\0', offset); + } + + return i; +} + #endif /* PAM_INLINE_H */ |