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43490e8046
The cipher implementations of the kernel crypto API favor in-place
cipher operations. Thus, switch the CTR cipher operation in the DRBG to
perform in-place operations. This is implemented by using the output
buffer as input buffer and zeroizing it before the cipher operation to
implement a CTR encryption of a NULL buffer.
The speed improvement is quite visibile with the following comparison
using the LRNG implementation.
Without the patch set:
16 bytes| 12.267661 MB/s| 61338304 bytes | 5000000213 ns
32 bytes| 23.603770 MB/s| 118018848 bytes | 5000000073 ns
64 bytes| 46.732262 MB/s| 233661312 bytes | 5000000241 ns
128 bytes| 90.038042 MB/s| 450190208 bytes | 5000000244 ns
256 bytes| 160.399616 MB/s| 801998080 bytes | 5000000393 ns
512 bytes| 259.878400 MB/s| 1299392000 bytes | 5000001675 ns
1024 bytes| 386.050662 MB/s| 1930253312 bytes | 5000001661 ns
2048 bytes| 493.641728 MB/s| 2468208640 bytes | 5000001598 ns
4096 bytes| 581.835981 MB/s| 2909179904 bytes | 5000003426 ns
With the patch set:
16 bytes | 17.051142 MB/s | 85255712 bytes | 5000000854 ns
32 bytes | 32.695898 MB/s | 163479488 bytes | 5000000544 ns
64 bytes | 64.490739 MB/s | 322453696 bytes | 5000000954 ns
128 bytes | 123.285043 MB/s | 616425216 bytes | 5000000201 ns
256 bytes | 233.434573 MB/s | 1167172864 bytes | 5000000573 ns
512 bytes | 384.405197 MB/s | 1922025984 bytes | 5000000671 ns
1024 bytes | 566.313370 MB/s | 2831566848 bytes | 5000001080 ns
2048 bytes | 744.518042 MB/s | 3722590208 bytes | 5000000926 ns
4096 bytes | 867.501670 MB/s | 4337508352 bytes | 5000002181 ns
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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|---|---|---|
| .. | ||
| internal | ||
| acompress.h | ||
| aead.h | ||
| aes.h | ||
| akcipher.h | ||
| algapi.h | ||
| authenc.h | ||
| b128ops.h | ||
| blowfish.h | ||
| cast_common.h | ||
| cast5.h | ||
| cast6.h | ||
| cbc.h | ||
| chacha20.h | ||
| cryptd.h | ||
| crypto_wq.h | ||
| ctr.h | ||
| des.h | ||
| dh.h | ||
| drbg.h | ||
| ecdh.h | ||
| engine.h | ||
| gcm.h | ||
| gf128mul.h | ||
| ghash.h | ||
| hash_info.h | ||
| hash.h | ||
| hmac.h | ||
| if_alg.h | ||
| kpp.h | ||
| mcryptd.h | ||
| md5.h | ||
| morus_common.h | ||
| morus640_glue.h | ||
| morus1280_glue.h | ||
| null.h | ||
| padlock.h | ||
| pcrypt.h | ||
| pkcs7.h | ||
| poly1305.h | ||
| public_key.h | ||
| rng.h | ||
| scatterwalk.h | ||
| serpent.h | ||
| sha.h | ||
| sha1_base.h | ||
| sha3.h | ||
| sha256_base.h | ||
| sha512_base.h | ||
| skcipher.h | ||
| sm3_base.h | ||
| sm3.h | ||
| sm4.h | ||
| speck.h | ||
| twofish.h | ||
| xts.h | ||