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46fbe375bf
putty-source/crypto
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Simon Tatham 46fbe375bf Switch to a fixed-window strategy for monty_pow. 
Instead of the basic square-and-multiply strategy which requires a
square and a multiply per exponent bit (i.e. two modular
multiplications per bit in total), we instead reduce to a square per
exponent bit and an extra multiply only every 5 bits, because the
value we're multiplying in is derived from 5 of the exponent bits at
once via a table lookup.

To avoid the obvious side-channel leakage of a literal table lookup,
we read the whole table every time, mp_selecting the right value into
the multiplication input. This isn't as slow as it sounds when the
alternative is four entire modular multiplications! In my testing,
this commit speeds up large modpows by a factor of just over 1.5, and
it still gets a clean pass from 'testsc'.
2021-11-28 12:19:34 +00:00
..
aes-common.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
aes-neon.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
aes-ni.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
aes-select.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
aes-sw.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
aes.h Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
arcfour.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
argon2.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
bcrypt.c Move a few stray header files into the crypto subdir. 2021-04-22 17:57:56 +01:00
blake2.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
blowfish.c Move a few stray header files into the crypto subdir. 2021-04-22 17:57:56 +01:00
blowfish.h Move a few stray header files into the crypto subdir. 2021-04-22 17:57:56 +01:00
chacha20-poly1305.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
CMakeLists.txt Compatibility with older versions of cmake. 2021-10-29 18:08:18 +01:00
crc32.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
des.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
diffie-hellman.c Pass diffiehellman ssh_kex objects to testcrypt. 2021-11-22 18:32:17 +00:00
dsa.c Spelling: standardise on "DSA", not "DSS". 2021-04-22 18:34:47 +01:00
ecc-arithmetic.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
ecc-ssh.c Generalise strbuf_catf() into put_fmt(). 2021-11-19 11:32:47 +00:00
ecc.h testcrypt: adjust some function parameter names. 2021-11-21 22:19:01 +00:00
hash_simple.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
hmac.c Generalise strbuf_catf() into put_fmt(). 2021-11-19 11:32:47 +00:00
mac_simple.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
mac.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
md5.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
mpint_i.h Move a few stray header files into the crypto subdir. 2021-04-22 17:57:56 +01:00
mpint.c Switch to a fixed-window strategy for monty_pow. 2021-11-28 12:19:34 +00:00
prng.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
pubkey-pem.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
pubkey-ppk.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
pubkey-ssh1.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
rsa.c Generalise strbuf_catf() into put_fmt(). 2021-11-19 11:32:47 +00:00
sha1-common.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha1-neon.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha1-ni.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha1-select.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha1-sw.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha1.h Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha3.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00
sha256-common.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha256-neon.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha256-ni.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha256-select.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha256-sw.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha256.h Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha512-common.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha512-neon.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha512-select.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha512-sw.c Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
sha512.h Break up crypto modules containing HW acceleration. 2021-04-21 21:55:26 +01:00
xdmauth.c Move crypto into its own subdirectory. 2021-04-21 21:55:26 +01:00