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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (test-pk-crypto)
#:use-module (guix pk-crypto)
#:use-module (guix utils)
#:use-module (guix hash)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-64)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (ice-9 match))
;; Test the (guix pk-crypto) module.
(define %key-pair
;; Key pair that was generated with:
;; (generate-key (string->canonical-sexp "(genkey (rsa (nbits 4:1024)))"))
;; which takes a bit of time.
"(key-data
(public-key
(rsa
(n #00C1F764069F54FFE93A126B02328903E984E4AE3AF6DF402B5B6B3907911B88C385F1BA76A002EC9DEA109A5228EF0E62EE31A06D1A5861CAB474F6C857AC66EB65A1905F25BBA1869579E73A3B7FED13AF5A1667326F88CDFC2FF24B03C14FD1384AA7E73CA89572880B606E3A974E15347963FC7B6378574936A47580DBCB45#)
(e #010001#)))
(private-key
(rsa
(n #00C1F764069F54FFE93A126B02328903E984E4AE3AF6DF402B5B6B3907911B88C385F1BA76A002EC9DEA109A5228EF0E62EE31A06D1A5861CAB474F6C857AC66EB65A1905F25BBA1869579E73A3B7FED13AF5A1667326F88CDFC2FF24B03C14FD1384AA7E73CA89572880B606E3A974E15347963FC7B6378574936A47580DBCB45#)
(e #010001#)
(d #58CAD84653D0046A8EC3F9AA82D9C829B145422109FC3F12DA01A694B92FA296E70D366FB166454D30E632CEE3A033B4C41781BA10325F69FCDC0250CA19C8EEB352FA085992494098DB133E682ED38A931701F0DED1A1E508F4341A4FB446A04F019427C7CB3C44F251EEA9D386100DA80F125E0FD5CE1B0DFEC6D21516EACD#)
(p #00D47F185147EC39393CCDA4E7323FFC20FC8B8073E2A54DD63BA392A66975E4204CA48572496A9DFD7522436B852C07472A5AB25B7706F7C14E6F33FBC420FF3B#)
(q #00E9AD22F158060BC9AE3601DA623AFC60FFF3058795802CA92371C00097335CF9A23D7782DE353C9DBA93D7BB99E6A24A411107605E722481C5C191F80D7EB77F#)
(u #59B45B95AE01A7A7370FAFDB08FE73A4793CE37F228961B09B1B1E7DDAD9F8D3E28F5C5E8B4B067E6B8E0BBF3F690B42991A79E46108DDCDA2514323A66964DE#))))")
(test-begin "pk-crypto")
(let ((sexps '("(foo bar)"
;; In Libgcrypt 1.5.3 the following integer is rendered as
;; binary, whereas in 1.6.0 it's rendered as is (hexadecimal.)
;;"#C0FFEE#"
"(genkey \n (rsa \n (nbits \"1024\")\n )\n )")))
(test-equal "string->canonical-sexp->string"
sexps
(let ((sexps (map string->canonical-sexp sexps)))
(and (every canonical-sexp? sexps)
(map (compose string-trim-both canonical-sexp->string) sexps)))))
(gc) ; stress test!
(let ((sexps `(("(foo bar)" foo -> "(foo bar)")
("(foo (bar (baz 3:123)))" baz -> "(baz \"123\")")
("(foo (bar 3:123))" baz -> #f))))
(test-equal "find-sexp-token"
(map (match-lambda
((_ _ '-> expected)
expected))
sexps)
(map (match-lambda
((input token '-> _)
(let ((sexp (find-sexp-token (string->canonical-sexp input) token)))
(and sexp
(string-trim-both (canonical-sexp->string sexp))))))
sexps)))
(gc)
(test-equal "canonical-sexp-length"
'(0 1 2 4 0 0)
(map (compose canonical-sexp-length string->canonical-sexp)
'("()" "(a)" "(a b)" "(a #616263# b #C001#)" "a" "#123456#")))
(test-equal "canonical-sexp-list?"
'(#t #f #t #f)
(map (compose canonical-sexp-list? string->canonical-sexp)
'("()" "\"abc\"" "(a b c)" "#123456#")))
(gc)
(test-equal "canonical-sexp-car + cdr"
'("(b \n (c xyz)\n )")
(let ((lst (string->canonical-sexp "(a (b (c xyz)))")))
(map (lambda (sexp)
(and sexp (string-trim-both (canonical-sexp->string sexp))))
;; Note: 'car' returns #f when the first element is an atom.
(list (canonical-sexp-car (canonical-sexp-cdr lst))))))
(gc)
(test-equal "canonical-sexp-nth"
'("(b pqr)" "(c \"456\")" "(d xyz)" #f #f)
(let ((lst (string->canonical-sexp "(a (b 3:pqr) (c 3:456) (d 3:xyz))")))
;; XXX: In Libgcrypt 1.5.3, (canonical-sexp-nth lst 0) returns LST, whereas in
;; 1.6.0 it returns #f.
(map (lambda (sexp)
(and sexp (string-trim-both (canonical-sexp->string sexp))))
(unfold (cut > <> 5)
(cut canonical-sexp-nth lst <>)
1+
1))))
(gc)
(test-equal "canonical-sexp-nth-data"
`(Name Otto Meier #f ,(base16-string->bytevector "123456") #f)
(let ((lst (string->canonical-sexp
"(Name Otto Meier (address Burgplatz) #123456#)")))
(unfold (cut > <> 5)
(cut canonical-sexp-nth-data lst <>)
1+
0)))
(gc)
;; XXX: The test below is typically too long as it needs to gather enough entropy.
;; (test-assert "generate-key"
;; (let ((key (generate-key (string->canonical-sexp
;; "(genkey (rsa (nbits 3:128)))"))))
;; (and (canonical-sexp? key)
;; (find-sexp-token key 'key-data)
;; (find-sexp-token key 'public-key)
;; (find-sexp-token key 'private-key))))
(test-assert "bytevector->hash-data->bytevector"
(let* ((bv (sha256 (string->utf8 "Hello, world.")))
(data (bytevector->hash-data bv "sha256")))
(and (canonical-sexp? data)
(let-values (((value algo) (hash-data->bytevector data)))
(and (string=? algo "sha256")
(bytevector=? value bv))))))
(test-assert "sign + verify"
(let* ((pair (string->canonical-sexp %key-pair))
(secret (find-sexp-token pair 'private-key))
(public (find-sexp-token pair 'public-key))
(data (bytevector->hash-data
(sha256 (string->utf8 "Hello, world."))))
(sig (sign data secret)))
(and (verify sig data public)
(not (verify sig
(bytevector->hash-data
(sha256 (string->utf8 "Hi!")))
public)))))
(gc)
(test-equal "canonical-sexp->sexp"
`((data
(flags pkcs1)
(hash sha256
,(base16-string->bytevector
"2749f0ea9f26c6c7be746a9cff8fa4c2f2a02b000070dba78429e9a11f87c6eb")))
(public-key
(rsa
(n ,(base16-string->bytevector
(string-downcase
"00C1F764069F54FFE93A126B02328903E984E4AE3AF6DF402B5B6B3907911B88C385F1BA76A002EC9DEA109A5228EF0E62EE31A06D1A5861CAB474F6C857AC66EB65A1905F25BBA1869579E73A3B7FED13AF5A1667326F88CDFC2FF24B03C14FD1384AA7E73CA89572880B606E3A974E15347963FC7B6378574936A47580DBCB45")))
(e ,(base16-string->bytevector
"010001")))))
(list (canonical-sexp->sexp
(string->canonical-sexp
"(data
(flags pkcs1)
(hash \"sha256\"
#2749f0ea9f26c6c7be746a9cff8fa4c2f2a02b000070dba78429e9a11f87c6eb#))"))
(canonical-sexp->sexp
(find-sexp-token (string->canonical-sexp %key-pair)
'public-key))))
(let ((lst
`((data
(flags pkcs1)
(hash sha256
,(base16-string->bytevector
"2749f0ea9f26c6c7be746a9cff8fa4c2f2a02b000070dba78429e9a11f87c6eb")))
(public-key
(rsa
(n ,(base16-string->bytevector
(string-downcase
"00C1F764069F54FFE93A126B02328903E984E4AE3AF6DF402B5B6B3907911B88C385F1BA76A002EC9DEA109A5228EF0E62EE31A06D1A5861CAB474F6C857AC66EB65A1905F25BBA1869579E73A3B7FED13AF5A1667326F88CDFC2FF24B03C14FD1384AA7E73CA89572880B606E3A974E15347963FC7B6378574936A47580DBCB45")))
(e ,(base16-string->bytevector
"010001")))))))
(test-equal "sexp->canonical-sexp->sexp"
lst
(map (compose canonical-sexp->sexp sexp->canonical-sexp)
lst)))
(let ((sexp `(signature
(public-key
(rsa
(n ,(make-bytevector 1024 1))
(e ,(base16-string->bytevector "010001")))))))
(test-equal "https://bugs.g10code.com/gnupg/issue1594"
;; The gcrypt bug above was primarily affecting our uses in
;; 'canonical-sexp->sexp', typically when applied to a signature sexp (in
;; 'guix authenticate -verify') with a "big" RSA key, such as 4096 bits.
sexp
(canonical-sexp->sexp (sexp->canonical-sexp sexp))))
(test-end)
(exit (= (test-runner-fail-count (test-runner-current)) 0))
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