624 lines
28 KiB
Scheme
624 lines
28 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2023 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix rpm)
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#:autoload (gcrypt hash) (hash-algorithm file-hash md5)
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#:use-module (guix build utils)
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#:use-module (ice-9 format)
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#:use-module (ice-9 match)
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#:use-module (ice-9 textual-ports)
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#:use-module (rnrs bytevectors)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-71)
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#:use-module (srfi srfi-171)
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#:export (generate-lead
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generate-signature
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generate-header
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assemble-rpm-metadata
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;; XXX: These are internals, but the inline disabling trick
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;; doesn't work on them.
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make-header-entry
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header-entry?
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header-entry-tag
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header-entry-count
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header-entry-value
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bytevector->hex-string
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fhs-directory?))
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;;; Commentary:
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;;;
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;;; This module provides the building blocks required to construct RPM
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;;; archives. It is intended to be importable on the build side, so shouldn't
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;;; depend on (guix diagnostics) or other host-side-only modules.
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;;;
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;;; Code:
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(define (gnu-system-triplet->machine-type triplet)
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"Return the machine component of TRIPLET, a GNU system triplet."
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(first (string-split triplet #\-)))
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(define (gnu-machine-type->rpm-arch type)
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"Return the canonical RPM architecture string, given machine TYPE."
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(match type
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("arm" "armv7hl")
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("powerpc" "ppc")
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("powerpc64le" "ppc64le")
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(machine machine))) ;unchanged
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(define (gnu-machine-type->rpm-number type)
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"Translate machine TYPE to its corresponding RPM integer value."
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;; Refer to the rpmrc.in file in the RPM source for the complete
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;; translation tables.
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(match type
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((or "i486" "i586" "i686" "x86_64") 1)
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((? (cut string-prefix? "powerpc" <>)) 5)
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("mips64el" 11)
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((? (cut string-prefix? "arm" <>)) 12)
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("aarch64" 19)
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((? (cut string-prefix? "riscv" <>)) 22)
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(_ (error "no RPM number known for machine type" type))))
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(define (u16-number->u8-list number)
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"Return a list of byte values made of NUMBER, a 16 bit unsigned integer."
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(let ((bv (uint-list->bytevector (list number) (endianness big) 2)))
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(bytevector->u8-list bv)))
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(define (u32-number->u8-list number)
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"Return a list of byte values made of NUMBER, a 32 bit unsigned integer."
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(let ((bv (uint-list->bytevector (list number) (endianness big) 4)))
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(bytevector->u8-list bv)))
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(define (s32-number->u8-list number)
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"Return a list of byte values made of NUMBER, a 32 bit signed integer."
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(let ((bv (sint-list->bytevector (list number) (endianness big) 4)))
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(bytevector->u8-list bv)))
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(define (u8-list->u32-number lst)
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"Return the 32 bit unsigned integer corresponding to the 4 bytes in LST."
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(bytevector-u32-ref (u8-list->bytevector lst) 0 (endianness big)))
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;;;
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;;; Lead section.
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;;;
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;; Refer to the docs/manual/format.md file of the RPM source for the details
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;; regarding the binary format of an RPM archive.
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(define* (generate-lead name-version #:key (target %host-type))
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"Generate a RPM lead u8-list that uses NAME-VERSION, the name and version
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string of the package, and TARGET, a GNU triplet used to derive the target
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machine type."
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(define machine-type (gnu-system-triplet->machine-type target))
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(define magic (list #xed #xab #xee #xdb))
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(define file-format-version (list 3 0)) ;3.0
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(define type (list 0 0)) ;0 for binary packages
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(define arch-number (u16-number->u8-list
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(gnu-machine-type->rpm-number machine-type)))
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;; The 66 bytes from 10 to 75 are for the name-version-release string.
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(define name
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(let ((padding-bytes (make-list (- 66 (string-length name-version)) 0)))
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(append (bytevector->u8-list (string->utf8 name-version))
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padding-bytes)))
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;; There is no OS number corresponding to GNU/Hurd (GNU), only Linux, per
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;; rpmrc.in.
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(define os-number (list 0 1))
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;; For RPM format 3.0, the signature type is 5, which means a "Header-style"
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;; signature.
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(define signature-type (list 0 5))
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(define reserved-bytes (make-list 16 0))
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(append magic file-format-version type arch-number name
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os-number signature-type reserved-bytes))
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;;;
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;;; Header section.
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;;;
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(define header-magic (list #x8e #xad #xe8))
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(define header-version (list 1))
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(define header-reserved (make-list 4 0)) ;4 reserved bytes
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;;; Every header starts with 8 bytes made by the header magic number, the
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;;; header version and 4 reserved bytes.
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(define header-intro (append header-magic header-version header-reserved))
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;;; Header entry data types.
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(define NULL 0)
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(define CHAR 1)
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(define INT8 2)
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(define INT16 3) ;2-bytes aligned
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(define INT32 4) ;4-bytes aligned
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(define INT64 5) ;8-bytes aligned
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(define STRING 6)
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(define BIN 7)
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(define STRING_ARRAY 8)
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(define I18NSTRIN_TYPE 9)
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;;; Header entry tags.
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(define-record-type <rpm-tag>
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(make-rpm-tag number type)
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rpm-tag?
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(number rpm-tag-number)
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(type rpm-tag-type))
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;;; The following are internal tags used to identify the data sections.
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(define RPMTAG_HEADERSIGNATURES (make-rpm-tag 62 BIN)) ;signature header
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(define RPMTAG_HEADERIMMUTABLE (make-rpm-tag 63 BIN)) ;main/data header
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(define RPMTAG_HEADERI18NTABLE (make-rpm-tag 100 STRING_ARRAY))
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;;; Subset of RPM tags from include/rpm/rpmtag.h.
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(define RPMTAG_NAME (make-rpm-tag 1000 STRING))
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(define RPMTAG_VERSION (make-rpm-tag 1001 STRING))
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(define RPMTAG_RELEASE (make-rpm-tag 1002 STRING))
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(define RPMTAG_SUMMARY (make-rpm-tag 1004 STRING))
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(define RPMTAG_SIZE (make-rpm-tag 1009 INT32))
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(define RPMTAG_LICENSE (make-rpm-tag 1014 STRING))
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(define RPMTAG_OS (make-rpm-tag 1021 STRING))
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(define RPMTAG_ARCH (make-rpm-tag 1022 STRING))
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(define RPMTAG_PREIN (make-rpm-tag 1023 STRING))
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(define RPMTAG_POSTIN (make-rpm-tag 1024 STRING))
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(define RPMTAG_PREUN (make-rpm-tag 1025 STRING))
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(define RPMTAG_POSTUN (make-rpm-tag 1026 STRING))
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(define RPMTAG_FILESIZES (make-rpm-tag 1028 INT32))
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(define RPMTAG_FILEMODES (make-rpm-tag 1030 INT16))
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(define RPMTAG_FILEDIGESTS (make-rpm-tag 1035 STRING_ARRAY))
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(define RPMTAG_FILELINKTOS (make-rpm-tag 1036 STRING_ARRAY))
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(define RPMTAG_FILEUSERNAME (make-rpm-tag 1039 STRING_ARRAY))
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(define RPMTAG_GROUPNAME (make-rpm-tag 1040 STRING_ARRAY))
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(define RPMTAG_PREFIXES (make-rpm-tag 1098 STRING_ARRAY))
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(define RPMTAG_DIRINDEXES (make-rpm-tag 1116 INT32))
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(define RPMTAG_BASENAMES (make-rpm-tag 1117 STRING_ARRAY))
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(define RPMTAG_DIRNAMES (make-rpm-tag 1118 STRING_ARRAY))
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(define RPMTAG_PAYLOADFORMAT (make-rpm-tag 1124 STRING))
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(define RPMTAG_PAYLOADCOMPRESSOR (make-rpm-tag 1125 STRING))
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(define RPMTAG_LONGFILESIZES (make-rpm-tag 5008 INT64))
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(define RPMTAG_LONGSIZE (make-rpm-tag 5009 INT64))
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;;; The algorithm used to compute the digest of each file, e.g. RPM_HASH_MD5.
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(define RPMTAG_FILEDIGESTALGO (make-rpm-tag 5011 INT32))
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;;; RPMTAG_ENCODING specifies the encoding used for strings, e.g. "utf-8".
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(define RPMTAG_ENCODING (make-rpm-tag 5062 STRING))
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;;; Compressed payload digest. Its type is a string array, but currently in
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;;; practice it is equivalent to STRING, since only the first element is used.
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(define RPMTAG_PAYLOADDIGEST (make-rpm-tag 5092 STRING_ARRAY))
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;;; The algorithm used to compute the payload digest, e.g. RPM_HASH_SHA256.
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(define RPMTAG_PAYLOADDIGESTALGO (make-rpm-tag 5093 INT32))
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;;; The following are taken from the rpmHashAlgo_e enum in rpmcrypto.h.
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(define RPM_HASH_MD5 1)
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(define RPM_HASH_SHA256 8)
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;;; Other useful internal definitions.
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(define REGION_TAG_COUNT 16) ;number of bytes
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(define INT32_MAX (1- (expt 2 32))) ;4294967295 bytes (unsigned)
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(define (rpm-tag->u8-list tag)
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"Return the u8 list corresponding to RPM-TAG, a <rpm-tag> object."
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(append (u32-number->u8-list (rpm-tag-number tag))
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(u32-number->u8-list (rpm-tag-type tag))))
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(define-record-type <header-entry>
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(make-header-entry tag count value)
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header-entry?
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(tag header-entry-tag) ;<rpm-tag>
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(count header-entry-count) ;number (u32)
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(value header-entry-value)) ;string|number|list|...
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(define (entry-type->alignement type)
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"Return the byte alignment of TYPE, an RPM header entry type."
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(cond ((= INT16 type) 2)
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((= INT32 type) 4)
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((= INT64 type) 8)
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(else 1)))
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(define (next-aligned-offset offset alignment)
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"Return the next position from OFFSET which satisfies ALIGNMENT."
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(if (= 0 (modulo offset alignment))
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offset
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(next-aligned-offset (1+ offset) alignment)))
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(define (header-entry->data entry)
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"Return the data of ENTRY, a <header-entry> object, as a u8 list."
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(let* ((tag (header-entry-tag entry))
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(count (header-entry-count entry))
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(value (header-entry-value entry))
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(number (rpm-tag-number tag))
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(type (rpm-tag-type tag)))
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(cond
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((= STRING type)
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(unless (string? value)
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(error "expected string value for STRING type, got" value))
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(unless (= 1 count)
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(error "count must be 1 for STRING type"))
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(let ((value (cond ((= (rpm-tag-number RPMTAG_VERSION) number)
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;; Hyphens are not allowed in version strings.
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(string-map (match-lambda
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(#\- #\+)
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(c c))
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value))
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(else value))))
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(append (bytevector->u8-list (string->utf8 value))
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(list 0)))) ;strings must end with null byte
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((= STRING_ARRAY type)
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(unless (list? value)
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(error "expected a list of strings for STRING_ARRAY type, got" value))
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(unless (= count (length value))
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(error "expected count to be equal to" (length value) 'got count))
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(append-map (lambda (s)
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(append (bytevector->u8-list (string->utf8 s))
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(list 0))) ;null byte separated
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value))
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((member type (list INT8 INT16 INT32))
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(if (= 1 count)
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(unless (number? value)
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(error "expected number value for scalar INT type; got" value))
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(unless (list? value)
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(error "expected list value for array INT type; got" value)))
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(if (list? value)
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(cond ((= INT8 type) value)
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((= INT16 type) (append-map u16-number->u8-list value))
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((= INT32 type) (append-map u32-number->u8-list value))
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(else (error "unexpected type" type)))
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(cond ((= INT8 type) (list value))
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((= INT16 type) (u16-number->u8-list value))
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((= INT32 type) (u32-number->u8-list value))
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(else (error "unexpected type" type)))))
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((= BIN type)
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(unless (list? value)
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(error "expected list value for BIN type; got" value))
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value)
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(else (error "unimplemented type" type)))))
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(define (make-header-index+data entries)
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"Return the index and data sections as u8 number lists, via multiple values.
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An index is composed of four u32 (16 bytes total) quantities, in order: tag,
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type, offset and count."
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(match (fold (match-lambda*
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((entry (offset . (index . data)))
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(let* ((tag (header-entry-tag entry))
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(tag-number (rpm-tag-number tag))
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(tag-type (rpm-tag-type tag))
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(count (header-entry-count entry))
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(data* (header-entry->data entry))
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(alignment (entry-type->alignement tag-type))
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(aligned-offset (next-aligned-offset offset alignment))
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(padding (make-list (- aligned-offset offset) 0)))
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(cons (+ aligned-offset (length data*))
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(cons (append index
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(u32-number->u8-list tag-number)
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(u32-number->u8-list tag-type)
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(u32-number->u8-list aligned-offset)
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(u32-number->u8-list count))
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(append data padding data*))))))
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'(0 . (() . ()))
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entries)
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((offset . (index . data))
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(values index data))))
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;; Prevent inlining of the variables/procedures accessed by unit tests.
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(set! make-header-index+data make-header-index+data)
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(set! RPMTAG_ARCH RPMTAG_ARCH)
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(set! RPMTAG_LICENSE RPMTAG_LICENSE)
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(set! RPMTAG_NAME RPMTAG_NAME)
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(set! RPMTAG_OS RPMTAG_OS)
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(set! RPMTAG_RELEASE RPMTAG_RELEASE)
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(set! RPMTAG_SUMMARY RPMTAG_SUMMARY)
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(set! RPMTAG_VERSION RPMTAG_VERSION)
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(define (wrap-in-region-tags header region-tag)
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"Wrap HEADER, a header provided as u8-list with REGION-TAG."
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(let* ((type (rpm-tag-type region-tag))
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(header-intro (take header 16))
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(header-rest (drop header 16))
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;; Increment the existing index value to account for the added region
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;; tag index.
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(index-length (1+ (u8-list->u32-number
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(drop-right (drop header-intro 8) 4)))) ;bytes 8-11
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;; Increment the data length value to account for the added region
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;; tag data.
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(data-length (+ REGION_TAG_COUNT
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(u8-list->u32-number
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(take-right header-intro 4))))) ;last 4 bytes of intro
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(unless (member region-tag (list RPMTAG_HEADERSIGNATURES
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RPMTAG_HEADERIMMUTABLE))
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(error "expected RPMTAG_HEADERSIGNATURES or RPMTAG_HEADERIMMUTABLE, got"
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region-tag))
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(append (drop-right header-intro 8) ;strip existing index and data lengths
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(u32-number->u8-list index-length)
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(u32-number->u8-list data-length)
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;; Region tag (16 bytes).
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(u32-number->u8-list (rpm-tag-number region-tag)) ;number
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(u32-number->u8-list type) ;type
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(u32-number->u8-list (- data-length REGION_TAG_COUNT)) ;offset
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(u32-number->u8-list REGION_TAG_COUNT) ;count
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;; Immutable region.
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header-rest
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;; Region tag trailer (16 bytes). Note: the trailer offset value
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;; is an enforced convention; it has no practical use.
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(u32-number->u8-list (rpm-tag-number region-tag)) ;number
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(u32-number->u8-list type) ;type
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(s32-number->u8-list (* -1 index-length 16)) ;negative offset
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(u32-number->u8-list REGION_TAG_COUNT)))) ;count
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(define (bytevector->hex-string bv)
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(format #f "~{~2,'0x~}" (bytevector->u8-list bv)))
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(define (files->md5-checksums files)
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"Return the MD5 checksums (formatted as hexadecimal strings) for FILES."
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(let ((file-md5 (cut file-hash (hash-algorithm md5) <>)))
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(map (lambda (f)
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(or (and=> (false-if-exception (file-md5 f))
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bytevector->hex-string)
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;; Only regular files (e.g., not directories) can have their
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;; checksum computed.
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""))
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files)))
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(define (strip-leading-dot name)
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"Remove the leading \".\" from NAME, if present. If a single \".\" is
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encountered, translate it to \"/\"."
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(match name
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("." "/") ;special case
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((? (cut string-prefix? "." <>))
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(string-drop name 1))
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(x name)))
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;;; An extensive list of required and optional FHS directories, per its 3.0
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;;; revision.
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(define %fhs-directories
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(list "/bin" "/boot" "/dev"
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"/etc" "/etc/opt" "/etc/X11" "/etc/sgml" "/etc/xml"
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"/home" "/root" "/lib" "/media" "/mnt"
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"/opt" "/opt/bin" "/opt/doc" "/opt/include"
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"/opt/info" "/opt/lib" "/opt/man"
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"/run" "/sbin" "/srv" "/sys" "/tmp"
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"/usr" "/usr/bin" "/usr/include" "/usr/libexec"
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"/usr/share/color" "/usr/share/dict" "/usr/share/doc" "/usr/share/games"
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"/usr/share/info" "/usr/share/locale" "/usr/share/man" "/usr/share/misc"
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"/usr/share/nls" "/usr/share/ppd" "/usr/share/sgml"
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"/usr/share/terminfo" "/usr/share/tmac" "/usr/share/xml"
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"/usr/share/zoneinfo" "/usr/local" "/usr/local/bin" "/usr/local/etc"
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"/usr/local/games" "/usr/local/include" "/usr/local/lib"
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"/usr/local/man" "/usr/local/sbin" "/usr/local/sbin" "/usr/local/share"
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"/usr/local/src" "/var" "/var/account" "/var/backups"
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"/var/cache" "/var/cache/fonts" "/var/cache/man" "/var/cache/www"
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"/var/crash" "/var/cron" "/var/games" "/var/mail" "/var/msgs"
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"/var/lib" "/var/lib/color" "/var/lib/hwclock" "/var/lib/misc"
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"/var/local" "/var/lock" "/var/log" "/var/opt" "/var/preserve"
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"/var/run" "/var/spool" "/var/spool/lpd" "/var/spool/mqueue"
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"/var/spool/news" "/var/spool/rwho" "/var/spool/uucp"
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"/var/tmp" "/var/yp"))
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(define (fhs-directory? file-name)
|
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"Predicate to check if FILE-NAME is a known File Hierarchy Standard (FHS)
|
||
directory."
|
||
(member (strip-leading-dot file-name) %fhs-directories))
|
||
|
||
(define (directory->file-entries directory)
|
||
"Return the file lists triplet header entries for the files found under
|
||
DIRECTORY."
|
||
(with-directory-excursion directory
|
||
;; Skip the initial "." directory, as its name would get concatenated with
|
||
;; the "./" dirname and fail to match "." in the payload.
|
||
(let* ((files (cdr (find-files "." #:directories? #t)))
|
||
(file-stats (map lstat files))
|
||
(directories
|
||
(append (list ".")
|
||
(filter-map (match-lambda
|
||
((index . file)
|
||
(let ((st (list-ref file-stats index)))
|
||
(and (eq? 'directory (stat:type st))
|
||
file))))
|
||
(list-transduce (tenumerate) rcons files))))
|
||
;; Omit any FHS directories found in FILES to avoid the RPM package
|
||
;; from owning them. This can occur when symlinks directives such
|
||
;; as "/usr/bin/hello -> bin/hello" are used.
|
||
(package-files package-file-stats
|
||
(unzip2 (reverse
|
||
(fold (lambda (file stat res)
|
||
(if (fhs-directory? file)
|
||
res
|
||
(cons (list file stat) res)))
|
||
'() files file-stats))))
|
||
|
||
;; When provided with the index of a file, the directory index must
|
||
;; return the index of the corresponding directory entry.
|
||
(dirindexes (map (lambda (d)
|
||
(list-index (cut string=? <> d) directories))
|
||
(map dirname package-files)))
|
||
;; The files owned are those appearing in 'basenames'; own them
|
||
;; all.
|
||
(basenames (map basename package-files))
|
||
;; The directory names must end with a trailing "/".
|
||
(dirnames (map (compose strip-leading-dot (cut string-append <> "/"))
|
||
directories))
|
||
;; Note: All the file-related entries must have the same length as
|
||
;; the basenames entry.
|
||
(symlink-targets (map (lambda (f)
|
||
(if (symbolic-link? f)
|
||
(readlink f)
|
||
"")) ;unused
|
||
package-files))
|
||
(file-modes (map stat:mode package-file-stats))
|
||
(file-sizes (map stat:size package-file-stats))
|
||
(file-md5s (files->md5-checksums package-files)))
|
||
(let ((basenames-length (length basenames))
|
||
(dirindexes-length (length dirindexes)))
|
||
(unless (= basenames-length dirindexes-length)
|
||
(error "length mismatch for dirIndexes; expected/actual"
|
||
basenames-length dirindexes-length))
|
||
(append
|
||
(if (> (apply max file-sizes) INT32_MAX)
|
||
(list (make-header-entry RPMTAG_LONGFILESIZES (length file-sizes)
|
||
file-sizes)
|
||
(make-header-entry RPMTAG_LONGSIZE 1
|
||
(reduce + 0 file-sizes)))
|
||
(list (make-header-entry RPMTAG_FILESIZES (length file-sizes)
|
||
file-sizes)
|
||
(make-header-entry RPMTAG_SIZE 1 (reduce + 0 file-sizes))))
|
||
(list
|
||
(make-header-entry RPMTAG_FILEMODES (length file-modes) file-modes)
|
||
(make-header-entry RPMTAG_FILEDIGESTS (length file-md5s) file-md5s)
|
||
(make-header-entry RPMTAG_FILEDIGESTALGO 1 RPM_HASH_MD5)
|
||
(make-header-entry RPMTAG_FILELINKTOS (length symlink-targets)
|
||
symlink-targets)
|
||
(make-header-entry RPMTAG_FILEUSERNAME basenames-length
|
||
(make-list basenames-length "root"))
|
||
(make-header-entry RPMTAG_GROUPNAME basenames-length
|
||
(make-list basenames-length "root"))
|
||
;; The dirindexes, basenames and dirnames tags form the so-called RPM
|
||
;; "path triplet".
|
||
(make-header-entry RPMTAG_DIRINDEXES dirindexes-length dirindexes)
|
||
(make-header-entry RPMTAG_BASENAMES basenames-length basenames)
|
||
(make-header-entry RPMTAG_DIRNAMES (length dirnames) dirnames)))))))
|
||
|
||
(define (make-header entries)
|
||
"Return the u8 list of a RPM header containing ENTRIES, a list of
|
||
<rpm-entry> objects."
|
||
(let* ((entries (sort entries (lambda (x y)
|
||
(< (rpm-tag-number (header-entry-tag x))
|
||
(rpm-tag-number (header-entry-tag y))))))
|
||
(count (length entries))
|
||
(index data (make-header-index+data entries)))
|
||
(append header-intro ;8 bytes
|
||
(u32-number->u8-list count) ;4 bytes
|
||
(u32-number->u8-list (length data)) ;4 bytes
|
||
;; Now starts the header index, which can contain up to 32 entries
|
||
;; of 16 bytes each.
|
||
index data)))
|
||
|
||
(define* (generate-header name version
|
||
payload-digest
|
||
payload-directory
|
||
payload-compressor
|
||
#:key
|
||
relocatable?
|
||
prein-file postin-file
|
||
preun-file postun-file
|
||
(target %host-type)
|
||
(release "0")
|
||
(license "N/A")
|
||
(summary "RPM archive generated by GNU Guix.")
|
||
(os "Linux")) ;see rpmrc.in
|
||
"Return the u8 list corresponding to the Header section. PAYLOAD-DIGEST is
|
||
the SHA256 checksum string of the compressed payload. PAYLOAD-DIRECTORY is
|
||
the directory containing the payload files. PAYLOAD-COMPRESSOR is the name of
|
||
the compressor used to compress the CPIO payload, such as \"none\", \"gz\",
|
||
\"xz\" or \"zstd\"."
|
||
(let* ((rpm-arch (gnu-machine-type->rpm-arch
|
||
(gnu-system-triplet->machine-type target)))
|
||
(file->string (cut call-with-input-file <> get-string-all))
|
||
(prein-script (and=> prein-file file->string))
|
||
(postin-script (and=> postin-file file->string))
|
||
(preun-script (and=> preun-file file->string))
|
||
(postun-script (and=> postun-file file->string)))
|
||
(wrap-in-region-tags
|
||
(make-header (append
|
||
(list (make-header-entry RPMTAG_HEADERI18NTABLE 1 (list "C"))
|
||
(make-header-entry RPMTAG_NAME 1 name)
|
||
(make-header-entry RPMTAG_VERSION 1 version)
|
||
(make-header-entry RPMTAG_RELEASE 1 release)
|
||
(make-header-entry RPMTAG_SUMMARY 1 summary)
|
||
(make-header-entry RPMTAG_LICENSE 1 license)
|
||
(make-header-entry RPMTAG_OS 1 os)
|
||
(make-header-entry RPMTAG_ARCH 1 rpm-arch))
|
||
(directory->file-entries payload-directory)
|
||
(if relocatable?
|
||
;; Note: RPMTAG_PREFIXES must not have a trailing
|
||
;; slash, unless it's '/'. This allows installing the
|
||
;; package via 'rpm -i --prefix=/tmp', for example.
|
||
(list (make-header-entry RPMTAG_PREFIXES 1 (list "/")))
|
||
'())
|
||
(if prein-script
|
||
(list (make-header-entry RPMTAG_PREIN 1 prein-script))
|
||
'())
|
||
(if postin-script
|
||
(list (make-header-entry RPMTAG_POSTIN 1 postin-script))
|
||
'())
|
||
(if preun-script
|
||
(list (make-header-entry RPMTAG_PREUN 1 preun-script))
|
||
'())
|
||
(if postun-script
|
||
(list (make-header-entry RPMTAG_POSTUN 1 postun-script))
|
||
'())
|
||
(if (string=? "none" payload-compressor)
|
||
'()
|
||
(list (make-header-entry RPMTAG_PAYLOADCOMPRESSOR 1
|
||
payload-compressor)))
|
||
(list (make-header-entry RPMTAG_ENCODING 1 "utf-8")
|
||
(make-header-entry RPMTAG_PAYLOADFORMAT 1 "cpio")
|
||
(make-header-entry RPMTAG_PAYLOADDIGEST 1
|
||
(list payload-digest))
|
||
(make-header-entry RPMTAG_PAYLOADDIGESTALGO 1
|
||
RPM_HASH_SHA256))))
|
||
RPMTAG_HEADERIMMUTABLE)))
|
||
|
||
|
||
;;;
|
||
;;; Signature section
|
||
;;;
|
||
|
||
;;; Header sha256 checksum.
|
||
(define RPMSIGTAG_SHA256 (make-rpm-tag 273 STRING))
|
||
;;; Uncompressed payload size.
|
||
(define RPMSIGTAG_PAYLOADSIZE (make-rpm-tag 1007 INT32))
|
||
;;; Header and compressed payload combined size.
|
||
(define RPMSIGTAG_SIZE (make-rpm-tag 1000 INT32))
|
||
;;; Uncompressed payload size (when size > max u32).
|
||
(define RPMSIGTAG_LONGARCHIVESIZE (make-rpm-tag 271 INT64))
|
||
;;; Header and compressed payload combined size (when size > max u32).
|
||
(define RPMSIGTAG_LONGSIZE (make-rpm-tag 270 INT64))
|
||
;;; Extra space reserved for signatures (typically 32 bytes).
|
||
(define RPMSIGTAG_RESERVEDSPACE (make-rpm-tag 1008 BIN))
|
||
|
||
(define (generate-signature header-sha256
|
||
header+compressed-payload-size
|
||
;; uncompressed-payload-size
|
||
)
|
||
"Return the u8 list representing a signature header containing the
|
||
HEADER-SHA256 (a string) and the PAYLOAD-SIZE, which is the combined size of
|
||
the header and compressed payload."
|
||
(define size-tag (if (> header+compressed-payload-size INT32_MAX)
|
||
RPMSIGTAG_LONGSIZE
|
||
RPMSIGTAG_SIZE))
|
||
(wrap-in-region-tags
|
||
(make-header (list (make-header-entry RPMSIGTAG_SHA256 1 header-sha256)
|
||
(make-header-entry size-tag 1
|
||
header+compressed-payload-size)
|
||
;; (make-header-entry RPMSIGTAG_PAYLOADSIZE 1
|
||
;; uncompressed-payload-size)
|
||
;; Reserve 32 bytes of extra space in case users would
|
||
;; like to add signatures, as done in rpmGenerateSignature.
|
||
(make-header-entry RPMSIGTAG_RESERVEDSPACE 32
|
||
(make-list 32 0))))
|
||
RPMTAG_HEADERSIGNATURES))
|
||
|
||
(define (assemble-rpm-metadata lead signature header)
|
||
"Align and append the various u8 list components together, and return the
|
||
result as a bytevector."
|
||
(let* ((offset (+ (length lead) (length signature)))
|
||
(header-offset (next-aligned-offset offset 8))
|
||
(padding (make-list (- header-offset offset) 0)))
|
||
;; The Header is 8-bytes aligned.
|
||
(u8-list->bytevector (append lead signature padding header))))
|