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Diffstat (limited to 'b512sum.1')
| -rw-r--r-- | b512sum.1 | 22 |
1 files changed, 21 insertions, 1 deletions
@@ -3,7 +3,7 @@ b512sum - Compute and check BLAKE-512 message digests .SH SYNOPSIS .B b512sum -[-c | -B | -L | -U] [-xz] +[-c | -B | -L | -U] [-S salt] [-xz] .RI [ file "] ..." .SH DESCRIPTION Print or check BLAKE-512 checksums. @@ -34,6 +34,26 @@ option is also used. .B -L Output checksums in lower-case hexadecimal representation. (Default) .TP +.BI "-S " salt +Specify a 32-byte salt that the BLAKE-512 algorithm shall use. +This salt shall be expressed in full length hexadecimal: 64 +hexadecimal digits, or rather 32 pairs of hexadecimal digits, +ordered from left to right to specify the values from index 0 +to the last byte. In each pair, the left digit stores the high +bits of the byte, and the right digit stores the low bits of +the byte. For example, the digit pair +.B 80 +represents a byte with the decimal value 128, whereas the +digit pair +.B 08 +represents a byte with the decimal value 8. The pairs +are joined without any delimiters, and no byte may be +omitted. So, for a salt where each byte's value is its +index, the salt is expressed as, +.BR 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f , +however each letter may be either small or capital. +If no salt is specified, an all-zeroes salt is used. +.TP .B -U Output checksums in upper-case hexadecimal representation. .TP |