This implementation is a straight copy of the tableless implementation inside Linux' lib/crc32.c
Signed-off-by: Ahmad Fatoum <[email protected]> --- crypto/crc32.c | 12 ++++++++++++ include/crc.h | 1 + 2 files changed, 13 insertions(+) diff --git a/crypto/crc32.c b/crypto/crc32.c index 232c023adb88..998cbc9de297 100644 --- a/crypto/crc32.c +++ b/crypto/crc32.c @@ -187,6 +187,18 @@ STATIC uint32_t crc32_no_comp(uint32_t crc, const void *_buf, unsigned int len) return crc; } +STATIC uint32_t crc32_be(uint32_t crc, const void *_buf, unsigned int len) +{ + const unsigned char *buf = _buf; + int i; + while (len--) { + crc ^= *buf++ << 24; + for (i = 0; i < 8; i++) + crc = (crc << 1) ^ ((crc & 0x80000000) ? 0x04c11db7 : 0); + } + return crc; +} + STATIC int file_crc(char *filename, ulong start, ulong size, ulong *crc, ulong *total) { diff --git a/include/crc.h b/include/crc.h index eb972705c21a..a5204aaabb9c 100644 --- a/include/crc.h +++ b/include/crc.h @@ -36,6 +36,7 @@ static inline u16 crc_itu_t_byte(u16 crc, const u8 data) #endif uint32_t crc32(uint32_t, const void *, unsigned int); +uint32_t crc32_be(uint32_t, const void *, unsigned int); uint32_t crc32_no_comp(uint32_t, const void *, unsigned int); int file_crc(char *filename, unsigned long start, unsigned long size, unsigned long *crc, unsigned long *total); -- 2.30.2 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
