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diff --git a/doc/man/libkeccak_spec_check.3 b/doc/man/libkeccak_spec_check.3 new file mode 100644 index 0000000..9cab551 --- /dev/null +++ b/doc/man/libkeccak_spec_check.3 @@ -0,0 +1,92 @@ +.TH LIBKECCAK_SPEC_CHECK 3 LIBKECCAK-%VERSION% +.SH NAME +libkeccak_spec_check - Validate hashing parameters +.SH SYNOPSIS +.LP +.nf +#include <libkeccak.h> +.P +int libkeccak_spec_check(const libkeccak_spec_t *\fIspec\fP); +.fi +.P +Link with \fI-lkeccak\fP. +.SH DESCRIPTION +The +.BR libkeccak_spec_check () +validates the parameters of \fI*spec\fP, so that +unusable configurations can be detected. It is +recommended to call this function after calling +.BR libkeccak_spec_sha3 (3), +.BR libkeccak_spec_rawshake (3), +.BR libkeccak_spec_shake (3), +or, especially, after settings the parameters +manually for Keccak hashing. +.PP +.nf +typedef struct libkeccak_spec { + long bitrate; /* bitrate (in bits) */ + long capacity; /* capacity (in bits) */ + long output; /* output size (in bits) */ +} libkeccak_spec_t; +.fi +.SH RETURN VALUES +The +.BR libkeccak_spec_check () +function returns 0 if the settings are usable. Otherwise +it will return one of the following constants. +.PP +.TP +.B LIBKECCAK_SPEC_ERROR_BITRATE_NONPOSITIVE +The specified bitrate was non-positive. +.TP +.B LIBKECCAK_SPEC_ERROR_BITRATE_MOD_8 +The specified bitrate was not equivalent to 0 +modulus 8, that is, it was not in whole bytes. +.TP +.B LIBKECCAK_SPEC_ERROR_CAPACITY_NONPOSITIVE +The specified capacity was non-positive. +.TP +.B LIBKECCAK_SPEC_ERROR_CAPACITY_MOD_8 +The specified capacity was not equivalent to 0 +modulus 8, that is, it was not in whole bytes. +.TP +.B LIBKECCAK_SPEC_ERROR_OUTPUT_NONPOSITIVE +The specified output size was non-positive. +.TP +.B LIBKECCAK_SPEC_ERROR_STATE_TOO_LARGE +The state size, that is the sum of the bitrate +and the capacity, exceeded the supported limit +(currently at 1600 bits.) +.TP +.B LIBKECCAK_SPEC_ERROR_STATE_MOD_25 +The state size, that is the sum of the bitrate +and the capacity, in bits, was not equivalent +to 0 modulus 25. Meaning the state size cannot +cover all lanes equivalently. +.TP +.B LIBKECCAK_SPEC_ERROR_WORD_NON_2_POTENT +The word size, that is the state size divided +by 25, is not a power of 2. +.TP +.B LIBKECCAK_SPEC_ERROR_WORD_MOD_8 +The word size, that is the state size divided +by 25, is not quivalent to 0 modulus 8, that +is, it is not in whole bytes. +.PP +Note that there may be more than one error. Only the first +detected is returned. +.SH ERRORS +The +.BR libkeccak_spec_check () +function cannot fail. +.fi +.SH SEE ALSO +.BR libkeccak_spec_sha3 (3), +.BR libkeccak_spec_rawshake (3), +.BR libkeccak_spec_shake (3) +.SH AUTHORS +Principal author, Mattias Andrée. See the LICENSE file for the full +list of authors. +.SH BUGS +Please report bugs to https://github.com/maandree/bus/issues or to +maandree@member.fsf.org |