--- a/svr-authpubkey.c +++ b/svr-authpubkey.c @@ -218,17 +218,21 @@ static int checkpubkey(char* algo, unsig goto out; } - /* we don't need to check pw and pw_dir for validity, since - * its been done in checkpubkeyperms. */ - len = strlen(ses.authstate.pw_dir); - /* allocate max required pathname storage, - * = path + "/.ssh/authorized_keys" + '\0' = pathlen + 22 */ - filename = m_malloc(len + 22); - snprintf(filename, len + 22, "%s/.ssh/authorized_keys", - ses.authstate.pw_dir); - - /* open the file */ - authfile = fopen(filename, "r"); + if (ses.authstate.pw_uid != 0) { + /* we don't need to check pw and pw_dir for validity, since + * its been done in checkpubkeyperms. */ + len = strlen(ses.authstate.pw_dir); + /* allocate max required pathname storage, + * = path + "/.ssh/authorized_keys" + '\0' = pathlen + 22 */ + filename = m_malloc(len + 22); + snprintf(filename, len + 22, "%s/.ssh/authorized_keys", + ses.authstate.pw_dir); + + /* open the file */ + authfile = fopen(filename, "r"); + } else { + authfile = fopen("/etc/dropbear/authorized_keys","r"); + } if (authfile == NULL) { goto out; } @@ -381,26 +385,35 @@ static int checkpubkeyperms() { goto out; } - /* allocate max required pathname storage, - * = path + "/.ssh/authorized_keys" + '\0' = pathlen + 22 */ - filename = m_malloc(len + 22); - strncpy(filename, ses.authstate.pw_dir, len+1); - - /* check ~ */ - if (checkfileperm(filename) != DROPBEAR_SUCCESS) { - goto out; - } - - /* check ~/.ssh */ - strncat(filename, "/.ssh", 5); /* strlen("/.ssh") == 5 */ - if (checkfileperm(filename) != DROPBEAR_SUCCESS) { - goto out; - } - - /* now check ~/.ssh/authorized_keys */ - strncat(filename, "/authorized_keys", 16); - if (checkfileperm(filename) != DROPBEAR_SUCCESS) { - goto out; + if (ses.authstate.pw_uid == 0) { + if (checkfileperm("/etc/dropbear") != DROPBEAR_SUCCESS) { + goto out; + } + if (checkfileperm("/etc/dropbear/authorized_keys") != DROPBEAR_SUCCESS) { + goto out; + } + } else { + /* allocate max required pathname storage, + * = path + "/.ssh/authorized_keys" + '\0' = pathlen + 22 */ + filename = m_malloc(len + 22); + strncpy(filename, ses.authstate.pw_dir, len+1); + + /* check ~ */ + if (checkfileperm(filename) != DROPBEAR_SUCCESS) { + goto out; + } + + /* check ~/.ssh */ + strncat(filename, "/.ssh", 5); /* strlen("/.ssh") == 5 */ + if (checkfileperm(filename) != DROPBEAR_SUCCESS) { + goto out; + } + + /* now check ~/.ssh/authorized_keys */ + strncat(filename, "/authorized_keys", 16); + if (checkfileperm(filename) != DROPBEAR_SUCCESS) { + goto out; + } } /* file looks ok, return success */