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Diffstat (limited to 'libkeccak_fast_update.3')
| -rw-r--r-- | libkeccak_fast_update.3 | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/libkeccak_fast_update.3 b/libkeccak_fast_update.3 deleted file mode 100644 index 5d38b0d..0000000 --- a/libkeccak_fast_update.3 +++ /dev/null @@ -1,101 +0,0 @@ -.TH LIBKECCAK_FAST_UPDATE 3 LIBKECCAK -.SH NAME -libkeccak_fast_update - Partially hash a message without erasure -.SH SYNOPSIS -.nf -#include <libkeccak.h> - -int libkeccak_fast_update(struct libkeccak_state *\fIstate\fP, const void *\fImsg\fP, size_t \fImsglen\fP); -.fi -.PP -Link with -.IR -lkeccak . -.SH DESCRIPTION -The -.BR libkeccak_fast_update () -function continues (or starts) hashing a message. -The current state of the hashing is stored in -.IR *state , -and will be updated. The message specified by the -.I msg -parameter with the byte-size specified by the -.I msglen -parameter, will be hashed. -.PP -The -.BR libkeccak_fast_update () -function may reallocate the state's message chunk buffer. -When doing so, it attempts to do so as quickly as possible, -rather than ensuring that the information in the old -allocation is securely removed if a new allocation is required. -.SH RETURN VALUES -The -.BR libkeccak_fast_update () -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_fast_update () -function may fail for any reason specified by the function -.BR realloc (3). -.SH NOTES -Neither parameter by be -.I NULL -or 0. -.SH EXAMPLE -This example calculates the Keccak[b = 1024, c = 576, n = 256] -hash of the input from stdin, and prints the hash, in hexadecimal -form, to stdout. -.PP -.nf -struct libkeccak_state state; -struct libkeccak_spec spec; -char binhash[256 / 8]; -char hexhash[256 / 8 * 2 + 1]; -char chunk[4 << 10]; -ssize_t len; - -spec.bitrate = 1024; -spec.capacity = 576; -spec.output = 256; -if (libkeccak_state_initialise(&state, &spec) < 0) - goto fail; - -for (;;) { - len = read(STDIN_FILENO, chunk, sizeof(chunk)); - - if ((len < 0) && (errno == EINTR)) - continue; - if (len < 0) - goto fail; - if (len == 0) - break; - - if (libkeccak_fast_update(&state, chunk, (size_t)len) < 0) - goto fail; -} -if (libkeccak_fast_digest(&state, NULL, 0, 0, \(dq\(dq, binhash) < 0) - goto fail; - -libkeccak_behex_lower(hexhash, binhash, sizeof(binhash)); -printf(\(dq%s\en\(dq, hexhash); -libkeccak_state_fast_destroy(&state); -.fi -.SH NOTES -For cSHAKE, the -.BR libkeccak_cshake_initialise (3), -must be called, once, immediately after -state initialisation; before the first -call to the -.BR libkeccak_fast_update () -function. -.SH SEE ALSO -.BR libkeccak_state_initialise (3), -.BR libkeccak_cshake_initialise (3), -.BR libkeccak_zerocopy_update (3), -.BR libkeccak_update (3), -.BR libkeccak_fast_digest (3), -.BR libkeccak_zerocopy_digest (3), -.BR libkeccak_digest (3) |