diff options
| -rw-r--r-- | libcrypt/crypt.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/libcrypt/crypt.c b/libcrypt/crypt.c index 89a26149c..33f98b65a 100644 --- a/libcrypt/crypt.c +++ b/libcrypt/crypt.c @@ -8,17 +8,35 @@ #define __FORCE_GLIBC #include <crypt.h> #include <unistd.h> +#include <string.h> +#include <errno.h> #include "libcrypt.h" +typedef char *(*crypt_impl_f)(const unsigned char *pw, const unsigned char *salt); + +static const struct { + const char *salt_pfx; + const crypt_impl_f crypt_impl; +} crypt_impl_tab[] = { + { "$1$", __md5_crypt }, + { NULL, __des_crypt }, +}; + char *crypt(const char *key, const char *salt) { const unsigned char *ukey = (const unsigned char *)key; const unsigned char *usalt = (const unsigned char *)salt; + size_t i; + + for (i = 0; i < ARRAY_SIZE(crypt_impl_tab); i++) { + if (crypt_impl_tab[i].salt_pfx != NULL && + strncmp(crypt_impl_tab[i].salt_pfx, salt, strlen(crypt_impl_tab[i].salt_pfx))) + continue; + + return crypt_impl_tab[i].crypt_impl(ukey, usalt); + } - /* First, check if we are supposed to be using the MD5 replacement - * instead of DES... */ - if (salt[0]=='$' && salt[1]=='1' && salt[2]=='$') - return __md5_crypt(ukey, usalt); - else - return __des_crypt(ukey, usalt); + /* no crypt implementation was found, set errno to ENOSYS and return NULL */ + __set_errno(ENOSYS); + return NULL; } |