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path: root/src/crypto/curve25519.c
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2018-09-03crypto: import zincJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-08-28crypto: use unaligned helpersJason A. Donenfeld
This is not useful for WireGuard, but for the general use case we probably want it this way, and the speed difference is mostly lost in the noise. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-03-09curve25519: use precomp implementation instead of sandy2xJason A. Donenfeld
It's faster and doesn't use the FPU. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-02-01curve25519: replace fiat64 with faster hacl64Jason A. Donenfeld
This reverts commit da4ff396cc5d5e0ff21f9ecbc2f951c048c63fff and adds some optimizations to hacl64. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-02-01curve25519: replace hacl64 with fiat64Jason A. Donenfeld
For now, it's faster: hacl64: 109782 cycles per call fiat64: 108984 cycles per call It's quite possible this commit will be reverted with nice changes from INRIA, though. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-01-18curve25519: wire up new impls and remove donnaJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-01-18curve25519: modularize implementationJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2018-01-03global: year bumpJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-12-13crypto: compile on UMLJason A. Donenfeld
We basically just don't use FPU in UML. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-12-09global: add SPDX tags to all filesGreg Kroah-Hartman
It's good to have SPDX identifiers in all files as the Linux kernel developers are working to add these identifiers to all files. Update all files with the correct SPDX license identifier based on the license text of the project or based on the license in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Modified-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-11-28curve25519: explictly depend on AS_AVXJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-11-28curve25519: modularize dispatchJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-11-22poly1305: import MIPS64 primitive from OpenSSLJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-11-22chacha20poly1305: import ARM primitives from OpenSSLJason A. Donenfeld
ARMv4-ARMv8, with NEON for ARMv7 and ARMv8. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-11-14curve25519-neon: compile in thumb modeJason A. Donenfeld
In thumb mode, it's not possible to use sp as an operand of and, so we have to muck around with r3 as a scratch register. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-11-11curve25519: reject deriving from NULL private keysJason A. Donenfeld
These aren't actually valid 25519 points pre-normalization, and doing this is required to make unsetting private keys based on all zeros. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-31curve25519: only enable int128 if compiler support is soundJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-31global: style nitsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-31qemu: allow for cross compilationJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-31crypto/avx: make sure we can actually use ymm registersJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-09-16compat: ensure we can build without compat.hJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-06-25curve25519: keep certain sandy2x functions in CJason A. Donenfeld
We can let the compiler optimize how it sees fit. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-06-24curve25519: satisfy sparse and use short typesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-06-24main: annotate init/exit functions to save memoryJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-06-12random: wait for random bytes when generating nonces and ephemeralsJason A. Donenfeld
We can let userspace configure wireguard interfaces before the RNG is fully initialized, since what we mostly care about is having good randomness for ephemerals and xchacha nonces. By deferring the wait to actually asking for the randomness, we give a lot more opportunity for gathering entropy. This won't cover entropy for hash table secrets or cookie secrets (which rotate anyway), but those have far less catastrophic failure modes, so ensuring good randomness for elliptic curve points and nonces should be sufficient. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-05-31curve25519: add NEON versions for ARMJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-05-31curve25519: align the basepoint to 32 bytesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-05-31curve25519: actually, do some things on heap sometimesJason A. Donenfeld
This reverts commit 42dd5bd87e418275203dd6644b6b6b0cc310d4d9. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-03-30curve25519: protect against potential invalid point attacksJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-03-24curve25519: 128-bit integer != x86_64Jason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-03-20curve25519: do dispatcher in C instead of asm, since shlx is haswell onlyJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-03-19curve25519: add AVX implementationJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-01-15curve25519: do everything on the stackJason A. Donenfeld
With MIPS now supporting a separate IRQ stack, and with these changes being backported into OpenWRT (and likely the stable mainline releases), we no longer need to kmalloc more space for temporary variables. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-01-10Update copyrightJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-12-11global: move to consistent use of uN instead of uintN_t for kernel codeJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-21headers: cleanup noticesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-10curve25519: use kmalloc in order to not overflow stackJason A. Donenfeld
On MIPS, the IRQ and SoftIRQ handlers share the stack with whatever kernel thread was interrupted. This means that Curve25519 can be interrupted by, say, an ethernet controller, that then gets handled by a SoftIRQ. If something like l2tp is being used, which uses quite a bit of stack, then by the time the SoftIRQ handler gets to WireGuard code and calls into the stack-heavy ChaPoly functions, our 8k stack is shot. In other words, since Curve25519 is such a big consumer of stack, if it's interrupted by anything else that uses a healthy amount of stack, then disaster strikes. The solution here is just to allocate using kmalloc. This is quite ugly, and if performance becomes an issue, we might consider moving to a kmem_cache allocator, or even having each peer keep its own preallocated space. But for now, we'll try this. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-05c89: the static keyword is okay in c99, but not in c89Jason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-09-29Rework headers and includesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-08-02selftest: move to subfolderJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-08-02c: specify static array size in function paramsJason A. Donenfeld
The C standard states: A declaration of a parameter as ``array of type'' shall be adjusted to ``qualified pointer to type'', where the type qualifiers (if any) are those specified within the [ and ] of the array type derivation. If the keyword static also appears within the [ and ] of the array type derivation, then for each call to the function, the value of the corresponding actual argument shall provide access to the first element of an array with at least as many elements as specified by the size expression. By changing void func(int array[4]) to void func(int array[static 4]), we automatically get the compiler checking argument sizes for us, which is quite nice. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-07-07curve25519: unneeded zeros variableJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-06-25tests: make fatalJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-06-25Initial commitJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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