diff options
Diffstat (limited to '')
| -rw-r--r-- | debian/vendor-h2o/deps/picotls/deps/cifra/src/blockwise.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/debian/vendor-h2o/deps/picotls/deps/cifra/src/blockwise.c b/debian/vendor-h2o/deps/picotls/deps/cifra/src/blockwise.c deleted file mode 100644 index 182c8c5..0000000 --- a/debian/vendor-h2o/deps/picotls/deps/cifra/src/blockwise.c +++ /dev/null @@ -1,195 +0,0 @@ -/* - * cifra - embedded cryptography library - * Written in 2014 by Joseph Birr-Pixton <jpixton@gmail.com> - * - * To the extent possible under law, the author(s) have dedicated all - * copyright and related and neighboring rights to this software to the - * public domain worldwide. This software is distributed without any - * warranty. - * - * You should have received a copy of the CC0 Public Domain Dedication - * along with this software. If not, see - * <http://creativecommons.org/publicdomain/zero/1.0/>. - */ - -#include "blockwise.h" -#include "bitops.h" -#include "handy.h" -#include "tassert.h" - -#include <string.h> - -void cf_blockwise_accumulate(uint8_t *partial, size_t *npartial, size_t nblock, - const void *inp, size_t nbytes, - cf_blockwise_in_fn process, - void *ctx) -{ - cf_blockwise_accumulate_final(partial, npartial, nblock, - inp, nbytes, - process, process, ctx); -} - -void cf_blockwise_accumulate_final(uint8_t *partial, size_t *npartial, size_t nblock, - const void *inp, size_t nbytes, - cf_blockwise_in_fn process, - cf_blockwise_in_fn process_final, - void *ctx) -{ - const uint8_t *bufin = inp; - assert(partial && *npartial < nblock); - assert(inp || !nbytes); - assert(process && ctx); - - /* If we have partial data, copy in to buffer. */ - if (*npartial && nbytes) - { - size_t space = nblock - *npartial; - size_t taken = MIN(space, nbytes); - - memcpy(partial + *npartial, bufin, taken); - - bufin += taken; - nbytes -= taken; - *npartial += taken; - - /* If that gives us a full block, process it. */ - if (*npartial == nblock) - { - if (nbytes == 0) - process_final(ctx, partial); - else - process(ctx, partial); - *npartial = 0; - } - } - - /* now nbytes < nblock or *npartial == 0. */ - - /* If we have a full block of data, process it directly. */ - while (nbytes >= nblock) - { - /* Partial buffer must be empty, or we're ignoring extant data */ - assert(*npartial == 0); - - if (nbytes == nblock) - process_final(ctx, bufin); - else - process(ctx, bufin); - bufin += nblock; - nbytes -= nblock; - } - - /* Finally, if we have remaining data, buffer it. */ - while (nbytes) - { - size_t space = nblock - *npartial; - size_t taken = MIN(space, nbytes); - - memcpy(partial + *npartial, bufin, taken); - - bufin += taken; - nbytes -= taken; - *npartial += taken; - - /* If we started with *npartial, we must have copied it - * in first. */ - assert(*npartial < nblock); - } -} - -void cf_blockwise_xor(uint8_t *partial, size_t *npartial, size_t nblock, - const void *inp, void *outp, size_t nbytes, - cf_blockwise_out_fn process, void *ctx) -{ - const uint8_t *inb = inp; - uint8_t *outb = outp; - - assert(partial && *npartial < nblock); - assert(inp || !nbytes); - assert(process && ctx); - - while (nbytes) - { - /* If we're out of material, and need more, produce a block. */ - if (*npartial == 0) - { - process(ctx, partial); - *npartial = nblock; - } - - size_t offset = nblock - *npartial; - size_t taken = MIN(*npartial, nbytes); - xor_bb(outb, inb, partial + offset, taken); - *npartial -= taken; - nbytes -= taken; - outb += taken; - inb += taken; - } -} - -void cf_blockwise_acc_byte(uint8_t *partial, size_t *npartial, - size_t nblock, - uint8_t byte, size_t nbytes, - cf_blockwise_in_fn process, - void *ctx) -{ - /* only memset the whole of the block once */ - int filled = 0; - - while (nbytes) - { - size_t start = *npartial; - size_t count = MIN(nbytes, nblock - start); - - if (!filled) - memset(partial + start, byte, count); - - if (start == 0 && count == nblock) - filled = 1; - - if (start + count == nblock) - { - process(ctx, partial); - *npartial = 0; - } else { - *npartial += count; - } - - nbytes -= count; - } -} - -void cf_blockwise_acc_pad(uint8_t *partial, size_t *npartial, - size_t nblock, - uint8_t fbyte, uint8_t mbyte, uint8_t lbyte, - size_t nbytes, - cf_blockwise_in_fn process, - void *ctx) -{ - - switch (nbytes) - { - case 0: break; - case 1: fbyte ^= lbyte; - cf_blockwise_accumulate(partial, npartial, nblock, &fbyte, 1, process, ctx); - break; - case 2: - cf_blockwise_accumulate(partial, npartial, nblock, &fbyte, 1, process, ctx); - cf_blockwise_accumulate(partial, npartial, nblock, &lbyte, 1, process, ctx); - break; - default: - cf_blockwise_accumulate(partial, npartial, nblock, &fbyte, 1, process, ctx); - - /* If the middle and last bytes differ, then process the last byte separately. - * Otherwise, just extend the middle block size. */ - if (lbyte != mbyte) - { - cf_blockwise_acc_byte(partial, npartial, nblock, mbyte, nbytes - 2, process, ctx); - cf_blockwise_accumulate(partial, npartial, nblock, &lbyte, 1, process, ctx); - } else { - cf_blockwise_acc_byte(partial, npartial, nblock, mbyte, nbytes - 1, process, ctx); - } - - break; - } -} |