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| -rw-r--r-- | README.md | 45 | ||||
| -rw-r--r-- | license.txt | 20 |
2 files changed, 52 insertions, 13 deletions
@@ -1,18 +1,37 @@ -My C11 SHA256 implementation. +Self-contained C11 SHA-2 implementation. + +Includes implementations of the following: +* SHA-224 +* SHA-256 +* SHA-384 +* SHA-512 +* HMAC-SHA-256 +* HMAC-SHA-512 See `tests.c` for usage. Benchmarks ========== - > time -p ./sha256 ~/Videos/8x*avi > /dev/null - rleal 9.39 - user 9.10 - sys 0.29 - > time -p sha256sum ~/Videos/8x*avi > /dev/null - real 12.04 - user 11.73 - sys 0.31 - > time -p openssl sha256 ~/Videos/8x*avi > /dev/null - real 6.36 - user 6.01 - sys 0.32 +Benchmarks. Partially unrolled compression makes this implementation +faster than [coreutils][], but slower than the [assembly-optimized, +family-specific OpenSSL SHA-2 implementation][openssl-asm-sha]. + +``` +> time -p ./sha256 ~/Videos/8x*avi > /dev/null +rleal 9.39 +user 9.10 +sys 0.29 +> time -p sha256sum ~/Videos/8x*avi > /dev/null +real 12.04 +user 11.73 +sys 0.31 +> time -p openssl sha256 ~/Videos/8x*avi > /dev/null +real 6.36 +user 6.01 +sys 0.32 +``` + + [sha2]: https://en.wikipedia.org/wiki/SHA-2 "Secure Hash Algorithm 2" + [c11]: https://en.wikipedia.org/wiki/C11_(C_standard_revision) "C11 standard of the C programming language" + [coreutils]: https://www.gnu.org/software/coreutils/ "GNU core utilities" + [openssl-asm-sha]: https://github.com/openssl/openssl/tree/master/crypto/sha/asm "assembly-optimized OpenSSL SHA-2 implementation." diff --git a/license.txt b/license.txt new file mode 100644 index 0000000..c921bf3 --- /dev/null +++ b/license.txt @@ -0,0 +1,20 @@ +Copyright 2019 Paul Duncan + +Permission is hereby granted, free of charge, to any person obtaining a +copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |