72 	if (iname->len <= 0 || iname->len > ctx->lim)  in ext4_fname_encrypt()
75 	ciphertext_len = (iname->len < EXT4_CRYPTO_BLOCK_SIZE) ?  in ext4_fname_encrypt()
76 		EXT4_CRYPTO_BLOCK_SIZE : iname->len;  in ext4_fname_encrypt()
96 	memcpy(workbuf, iname->name, iname->len);  in ext4_fname_encrypt()
97 	if (iname->len < ciphertext_len)  in ext4_fname_encrypt()
98 		memset(workbuf + iname->len, 0, ciphertext_len - iname->len);  in ext4_fname_encrypt()
124 	oname->len = ciphertext_len;  in ext4_fname_encrypt()
148 	if (iname->len <= 0 || iname->len > ctx->lim)  in ext4_fname_decrypt()
152 	tmp_in[0].len = iname->len;  in ext4_fname_decrypt()
170 	memcpy(workbuf, iname->name, iname->len);  in ext4_fname_decrypt()
178 	ablkcipher_request_set_crypt(req, sg, sg, iname->len, iv);  in ext4_fname_decrypt()
187 		memcpy(oname->name, workbuf, iname->len);  in ext4_fname_decrypt()
188 		res = iname->len;  in ext4_fname_decrypt()
199 	oname->len = strnlen(oname->name, iname->len);  in ext4_fname_decrypt()
200 	return oname->len;  in ext4_fname_decrypt()
212 static int digest_encode(const char *src, int len, char *dst)  in digest_encode()  argument
217 	while (i < len) {  in digest_encode()
232 static int digest_decode(const char *src, int len, char *dst)  in digest_decode()  argument
238 	while (i < len) {  in digest_decode()
505 	crypto_str->len = olen;  in ext4_fname_crypto_alloc_buffer()
542 	if (iname->len < 3) {  in _ext4_fname_disk_to_usr()
544 		if (iname->name[0] == '.' && iname->name[iname->len-1] == '.') {  in _ext4_fname_disk_to_usr()
546 			oname->name[iname->len-1] = '.';  in _ext4_fname_disk_to_usr()
547 			oname->len = iname->len;  in _ext4_fname_disk_to_usr()
548 			return oname->len;  in _ext4_fname_disk_to_usr()
554 	if (iname->len <= EXT4_FNAME_CRYPTO_DIGEST_SIZE) {  in _ext4_fname_disk_to_usr()
555 		ret = digest_encode(iname->name, iname->len, oname->name);  in _ext4_fname_disk_to_usr()
556 		oname->len = ret;  in _ext4_fname_disk_to_usr()
564 	memcpy(buf + 8, iname->name + iname->len - 16, 16);  in _ext4_fname_disk_to_usr()
567 	oname->len = ret + 1;  in _ext4_fname_disk_to_usr()
577 				 .len = de->name_len };  in ext4_fname_disk_to_usr()
594 	if (iname->len < 3) {  in ext4_fname_usr_to_disk()
597 				iname->name[iname->len-1] == '.') {  in ext4_fname_usr_to_disk()
599 			oname->name[iname->len-1] = '.';  in ext4_fname_usr_to_disk()
600 			oname->len = iname->len;  in ext4_fname_usr_to_disk()
601 			return oname->len;  in ext4_fname_usr_to_disk()
627 	     ((iname->len == 1) ||  in ext4_fname_usr_to_hash()
628 	      ((iname->name[1] == '.') && (iname->len == 2))))) {  in ext4_fname_usr_to_hash()
629 		ext4fs_dirhash(iname->name, iname->len, hinfo);  in ext4_fname_usr_to_hash()
634 		if (iname->len != 33)  in ext4_fname_usr_to_hash()
636 		ret = digest_decode(iname->name+1, iname->len, buf);  in ext4_fname_usr_to_hash()
645 		if (iname->len > 43)  in ext4_fname_usr_to_hash()
647 		ret = digest_decode(iname->name, iname->len, buf);  in ext4_fname_usr_to_hash()
653 	ret = ext4_fname_crypto_alloc_buffer(ctx, iname->len, &tmp);  in ext4_fname_usr_to_hash()
659 		ext4fs_dirhash(tmp.name, tmp.len, hinfo);  in ext4_fname_usr_to_hash()
668 		     int len, const char * const name,  in ext4_fname_match()  argument
678 			ret = ext4_fname_crypto_alloc_buffer(ctx, len, cstr);  in ext4_fname_match()
682 			istr.len = len;  in ext4_fname_match()
692 			if ((bigname && (len != 33)) ||  in ext4_fname_match()
693 			    (!bigname && (len > 43)))  in ext4_fname_match()
695 			ret = digest_decode(name+bigname, len-bigname,  in ext4_fname_match()
701 			cstr->len = ret;  in ext4_fname_match()
711 	if (de->name_len != cstr->len)  in ext4_fname_match()
713 	ret = memcmp(de->name, cstr->name, cstr->len);  in ext4_fname_match()