diff options
| -rw-r--r-- | guix/openpgp.scm | 21 |
1 files changed, 4 insertions, 17 deletions
diff --git a/guix/openpgp.scm b/guix/openpgp.scm index b74f8ff5bf..33c851255b 100644 --- a/guix/openpgp.scm +++ b/guix/openpgp.scm @@ -1029,23 +1029,10 @@ there is no limit." (define (crc24 bv) "Compute a CRC24 as described in RFC4880, Section 6.1." - (define poly #x1864cfb) - - (let loop ((crc #xb704ce) - (index 0)) - (if (= index (bytevector-length bv)) - (logand crc #xffffff) - (let ((crc (logxor (ash (bytevector-u8-ref bv index) 16) - crc))) - (let inner ((i 0) - (crc crc)) - (if (< i 8) - (let ((crc (ash crc 1))) - (inner (+ i 1) - (if (zero? (logand crc #x1000000)) - crc - (logxor crc poly)))) - (loop crc (+ index 1)))))))) + ;; We used to have it implemented in Scheme but the C version here makes + ;; 'load-keyring-from-reference' 18% faster when loading the 72 + ;; ASCII-armored files of today's Guix keyring. + (bytevector->uint (bytevector-hash bv (hash-algorithm crc24-rfc2440)))) (define %begin-block-prefix "-----BEGIN ") (define %begin-block-suffix "-----") |