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author | Mattias Andrée <maandree@kth.se> | 2017-10-14 01:01:14 +0200 |
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committer | Mattias Andrée <maandree@kth.se> | 2017-10-14 01:01:14 +0200 |
commit | 3e1864aa14a33a3c917537a241f6a032cfcacf78 (patch) | |
tree | 25297b1363fa88c9f45b5102afa5e95d08e986c1 /doc/man/libkeccak_hmac_digest.3 | |
parent | Change style and license (diff) | |
download | libkeccak-3e1864aa14a33a3c917537a241f6a032cfcacf78.tar.gz libkeccak-3e1864aa14a33a3c917537a241f6a032cfcacf78.tar.bz2 libkeccak-3e1864aa14a33a3c917537a241f6a032cfcacf78.tar.xz |
General improvements
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'doc/man/libkeccak_hmac_digest.3')
-rw-r--r-- | doc/man/libkeccak_hmac_digest.3 | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/doc/man/libkeccak_hmac_digest.3 b/doc/man/libkeccak_hmac_digest.3 deleted file mode 100644 index 66d35d4..0000000 --- a/doc/man/libkeccak_hmac_digest.3 +++ /dev/null @@ -1,103 +0,0 @@ -.TH LIBKECCAK_HMAC_DIGEST 3 LIBKECCAK -.SH NAME -libkeccak_hmac_digest - Complete the HMAC-hashing of a message with erasure -.SH SYNOPSIS -.LP -.nf -#include <libkeccak.h> -.P -int -libkeccak_hmac_digest(libkeccak_hmac_state_t *\fIstate\fP, const char *\fImsg\fP, - size_t \fImsglen\fP, size_t \fIbits\fP, const char *\fIsuffix\fP, - char *\fIhashsum\fP); -.fi -.P -Link with -.IR -lkeccak . -.SH DESCRIPTION -The -.BR libkeccak_hmac_digest () -function absorbes the last part of (or all of) a message, -and returns the HMAC hash of the entire message. The last -part of the message is specified by the -.I msg -parameter, and its byte-size is specified by the -.I msglen -parameter. If all of the message has already be processed -by calls to the -.BR libkeccak_hmac_update (3) -function or the -.BR libkeccak_hmac_fast_update (3) -function (with the same pointer on -.IR state ,) -.I msg -and -.I msglen -should be set to -.I NULL -and 0, respectively. -.PP -If the message is not comprised a whole number of bytes, -the number of bits, modulus 8, in the message should be -specified in the -.I bits -parameter. -.I msglen -must only count the number of whole bytes, that is, the -floor of the number of bits in the message divided by 8. -.PP -.I suffix -should be a NUL-terminated string of ASCII '1':s -and '0':s, representing the bits that should be appended -to the message. If this string is empty, -.I NULL -may be used instead. This is used to select hash algorithm. -For pure Keccak, -.I NULL -or "" is used. For the other algorithms the constants -.B LIBKECCAK_SHA3_SUFFIX -(for SHA-3), -.B LIBKECCAK_RAWSHAKE_SUFFIX -(for RawSHAKE), and -.B LIBKECCAK_SHAKE_SUFFIX -(for SHAKE) are used. -.PP -The hash of the message will be stored to -.IR hashsum , -unless -.I hashsum -is -.I NULL -(which increases the performance of the call.) A total of -.RI (( state->n -+ 7) / 8) bytes will be written to the beginning of -.IR hashsum . -Therefore, -.I hashsum -needs at least an allocation size of that number of bytes. -.PP -The -.BR libkeccak_hmac_digest () -function may reallocate the state's message chunk buffer. -When doing so, it attempts to do so as securely as possible, -rather than as fast as possible. -.SH RETURN VALUES -The -.BR libkeccak_hmac_digest () -function returns 0 upon successful completion. On error, --1 is returned and -.I errno -is set to describe the error. -.SH ERRORS -The -.BR libkeccak_hmac_digest () -function may fail for any reason specified by the function -.BR malloc (3). -.SH SEE ALSO -.BR libkeccak_hmac_create (3), -.BR libkeccak_hmac_initialise (3), -.BR libkeccak_hmac_update (3), -.BR libkeccak_hmac_fast_digest (3) -.SH BUGS -Please report bugs to https://github.com/maandree/libkeccak/issues or to -maandree@kth.se |