crypto: x86/salsa20 - remove x86 salsa20 implementations
The x86 assembly implementations of Salsa20 use the frame base pointer register (%ebp or %rbp), which breaks frame pointer convention and breaks stack traces when unwinding from an interrupt in the crypto code. Recent (v4.10+) kernels will warn about this, e.g. WARNING: kernel stack regs at 00000000a8291e69 in syzkaller047086:4677 has bad 'bp' value 000000001077994c [...] But after looking into it, I believe there's very little reason to still retain the x86 Salsa20 code. First, these are *not* vectorized (SSE2/SSSE3/AVX2) implementations, which would be needed to get anywhere close to the best Salsa20 performance on any remotely modern x86 processor; they're just regular x86 assembly. Second, it's still unclear that anyone is actually using the kernel's Salsa20 at all, especially given that now ChaCha20 is supported too, and with much more efficient SSSE3 and AVX2 implementations. Finally, in benchmarks I did on both Intel and AMD processors with both gcc 8.1.0 and gcc 4.9.4, the x86_64 salsa20-asm is actually slightly *slower* than salsa20-generic (~3% slower on Skylake, ~10% slower on Zen), while the i686 salsa20-asm is only slightly faster than salsa20-generic (~15% faster on Skylake, ~20% faster on Zen). The gcc version made little difference. So, the x86_64 salsa20-asm is pretty clearly useless. That leaves just the i686 salsa20-asm, which based on my tests provides a 15-20% speed boost. But that's without updating the code to not use %ebp. And given the maintenance cost, the small speed difference vs. salsa20-generic, the fact that few people still use i686 kernels, the doubt that anyone is even using the kernel's Salsa20 at all, and the fact that a SSE2 implementation would almost certainly be much faster on any remotely modern x86 processor yet no one has cared enough to add one yet, I don't think it's worthwhile to keep. Thus, just remove both the x86_64 and i686 salsa20-asm implementations. Reported-by: syzbot+ffa3a158337bbc01ff09@syzkaller.appspotmail.com Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
Herbert Xu
parent
0b3a830bb4
commit
b7b73cd5d7
5 changed files with 0 additions and 1866 deletions
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@ -15,7 +15,6 @@ obj-$(CONFIG_CRYPTO_GLUE_HELPER_X86) += glue_helper.o
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obj-$(CONFIG_CRYPTO_AES_586) += aes-i586.o
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obj-$(CONFIG_CRYPTO_TWOFISH_586) += twofish-i586.o
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obj-$(CONFIG_CRYPTO_SALSA20_586) += salsa20-i586.o
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obj-$(CONFIG_CRYPTO_SERPENT_SSE2_586) += serpent-sse2-i586.o
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obj-$(CONFIG_CRYPTO_AES_X86_64) += aes-x86_64.o
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@ -24,7 +23,6 @@ obj-$(CONFIG_CRYPTO_CAMELLIA_X86_64) += camellia-x86_64.o
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obj-$(CONFIG_CRYPTO_BLOWFISH_X86_64) += blowfish-x86_64.o
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obj-$(CONFIG_CRYPTO_TWOFISH_X86_64) += twofish-x86_64.o
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obj-$(CONFIG_CRYPTO_TWOFISH_X86_64_3WAY) += twofish-x86_64-3way.o
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obj-$(CONFIG_CRYPTO_SALSA20_X86_64) += salsa20-x86_64.o
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obj-$(CONFIG_CRYPTO_CHACHA20_X86_64) += chacha20-x86_64.o
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obj-$(CONFIG_CRYPTO_SERPENT_SSE2_X86_64) += serpent-sse2-x86_64.o
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obj-$(CONFIG_CRYPTO_AES_NI_INTEL) += aesni-intel.o
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@ -71,7 +69,6 @@ endif
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aes-i586-y := aes-i586-asm_32.o aes_glue.o
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twofish-i586-y := twofish-i586-asm_32.o twofish_glue.o
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salsa20-i586-y := salsa20-i586-asm_32.o salsa20_glue.o
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serpent-sse2-i586-y := serpent-sse2-i586-asm_32.o serpent_sse2_glue.o
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aes-x86_64-y := aes-x86_64-asm_64.o aes_glue.o
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@ -80,7 +77,6 @@ camellia-x86_64-y := camellia-x86_64-asm_64.o camellia_glue.o
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blowfish-x86_64-y := blowfish-x86_64-asm_64.o blowfish_glue.o
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twofish-x86_64-y := twofish-x86_64-asm_64.o twofish_glue.o
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twofish-x86_64-3way-y := twofish-x86_64-asm_64-3way.o twofish_glue_3way.o
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salsa20-x86_64-y := salsa20-x86_64-asm_64.o salsa20_glue.o
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chacha20-x86_64-y := chacha20-ssse3-x86_64.o chacha20_glue.o
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serpent-sse2-x86_64-y := serpent-sse2-x86_64-asm_64.o serpent_sse2_glue.o
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@ -1,938 +0,0 @@
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# Derived from:
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# salsa20_pm.s version 20051229
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# D. J. Bernstein
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# Public domain.
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#include <linux/linkage.h>
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.text
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# enter salsa20_encrypt_bytes
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ENTRY(salsa20_encrypt_bytes)
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mov %esp,%eax
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and $31,%eax
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add $256,%eax
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sub %eax,%esp
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# eax_stack = eax
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movl %eax,80(%esp)
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# ebx_stack = ebx
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movl %ebx,84(%esp)
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# esi_stack = esi
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movl %esi,88(%esp)
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# edi_stack = edi
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movl %edi,92(%esp)
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# ebp_stack = ebp
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movl %ebp,96(%esp)
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# x = arg1
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movl 4(%esp,%eax),%edx
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# m = arg2
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movl 8(%esp,%eax),%esi
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# out = arg3
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movl 12(%esp,%eax),%edi
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# bytes = arg4
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movl 16(%esp,%eax),%ebx
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# bytes -= 0
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sub $0,%ebx
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# goto done if unsigned<=
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jbe ._done
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._start:
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# in0 = *(uint32 *) (x + 0)
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movl 0(%edx),%eax
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# in1 = *(uint32 *) (x + 4)
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movl 4(%edx),%ecx
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# in2 = *(uint32 *) (x + 8)
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movl 8(%edx),%ebp
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# j0 = in0
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movl %eax,164(%esp)
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# in3 = *(uint32 *) (x + 12)
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movl 12(%edx),%eax
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# j1 = in1
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movl %ecx,168(%esp)
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# in4 = *(uint32 *) (x + 16)
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movl 16(%edx),%ecx
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# j2 = in2
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movl %ebp,172(%esp)
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# in5 = *(uint32 *) (x + 20)
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movl 20(%edx),%ebp
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# j3 = in3
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movl %eax,176(%esp)
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# in6 = *(uint32 *) (x + 24)
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movl 24(%edx),%eax
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# j4 = in4
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movl %ecx,180(%esp)
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# in7 = *(uint32 *) (x + 28)
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movl 28(%edx),%ecx
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# j5 = in5
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movl %ebp,184(%esp)
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# in8 = *(uint32 *) (x + 32)
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movl 32(%edx),%ebp
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# j6 = in6
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movl %eax,188(%esp)
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# in9 = *(uint32 *) (x + 36)
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movl 36(%edx),%eax
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# j7 = in7
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movl %ecx,192(%esp)
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# in10 = *(uint32 *) (x + 40)
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movl 40(%edx),%ecx
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# j8 = in8
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movl %ebp,196(%esp)
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# in11 = *(uint32 *) (x + 44)
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movl 44(%edx),%ebp
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# j9 = in9
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movl %eax,200(%esp)
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# in12 = *(uint32 *) (x + 48)
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movl 48(%edx),%eax
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# j10 = in10
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movl %ecx,204(%esp)
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# in13 = *(uint32 *) (x + 52)
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movl 52(%edx),%ecx
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# j11 = in11
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movl %ebp,208(%esp)
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# in14 = *(uint32 *) (x + 56)
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movl 56(%edx),%ebp
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# j12 = in12
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movl %eax,212(%esp)
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# in15 = *(uint32 *) (x + 60)
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movl 60(%edx),%eax
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# j13 = in13
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movl %ecx,216(%esp)
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# j14 = in14
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movl %ebp,220(%esp)
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# j15 = in15
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movl %eax,224(%esp)
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# x_backup = x
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movl %edx,64(%esp)
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._bytesatleast1:
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# bytes - 64
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cmp $64,%ebx
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# goto nocopy if unsigned>=
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jae ._nocopy
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# ctarget = out
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movl %edi,228(%esp)
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# out = &tmp
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leal 0(%esp),%edi
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# i = bytes
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mov %ebx,%ecx
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# while (i) { *out++ = *m++; --i }
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rep movsb
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# out = &tmp
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leal 0(%esp),%edi
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# m = &tmp
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leal 0(%esp),%esi
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._nocopy:
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# out_backup = out
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movl %edi,72(%esp)
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# m_backup = m
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movl %esi,68(%esp)
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# bytes_backup = bytes
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movl %ebx,76(%esp)
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# in0 = j0
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movl 164(%esp),%eax
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# in1 = j1
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movl 168(%esp),%ecx
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# in2 = j2
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movl 172(%esp),%edx
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# in3 = j3
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movl 176(%esp),%ebx
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# x0 = in0
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movl %eax,100(%esp)
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# x1 = in1
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movl %ecx,104(%esp)
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# x2 = in2
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movl %edx,108(%esp)
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# x3 = in3
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movl %ebx,112(%esp)
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# in4 = j4
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movl 180(%esp),%eax
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# in5 = j5
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movl 184(%esp),%ecx
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# in6 = j6
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movl 188(%esp),%edx
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# in7 = j7
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movl 192(%esp),%ebx
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# x4 = in4
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movl %eax,116(%esp)
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# x5 = in5
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movl %ecx,120(%esp)
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# x6 = in6
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movl %edx,124(%esp)
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# x7 = in7
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movl %ebx,128(%esp)
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# in8 = j8
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movl 196(%esp),%eax
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# in9 = j9
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movl 200(%esp),%ecx
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# in10 = j10
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movl 204(%esp),%edx
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# in11 = j11
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movl 208(%esp),%ebx
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# x8 = in8
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movl %eax,132(%esp)
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# x9 = in9
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movl %ecx,136(%esp)
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# x10 = in10
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movl %edx,140(%esp)
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# x11 = in11
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movl %ebx,144(%esp)
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# in12 = j12
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movl 212(%esp),%eax
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# in13 = j13
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movl 216(%esp),%ecx
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# in14 = j14
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movl 220(%esp),%edx
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# in15 = j15
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movl 224(%esp),%ebx
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# x12 = in12
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movl %eax,148(%esp)
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# x13 = in13
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movl %ecx,152(%esp)
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# x14 = in14
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movl %edx,156(%esp)
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# x15 = in15
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movl %ebx,160(%esp)
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# i = 20
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mov $20,%ebp
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# p = x0
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movl 100(%esp),%eax
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# s = x5
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movl 120(%esp),%ecx
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# t = x10
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movl 140(%esp),%edx
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# w = x15
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movl 160(%esp),%ebx
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._mainloop:
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# x0 = p
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movl %eax,100(%esp)
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# x10 = t
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movl %edx,140(%esp)
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# p += x12
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addl 148(%esp),%eax
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# x5 = s
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movl %ecx,120(%esp)
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# t += x6
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addl 124(%esp),%edx
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# x15 = w
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movl %ebx,160(%esp)
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# r = x1
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movl 104(%esp),%esi
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# r += s
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add %ecx,%esi
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# v = x11
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movl 144(%esp),%edi
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# v += w
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add %ebx,%edi
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# p <<<= 7
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rol $7,%eax
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# p ^= x4
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xorl 116(%esp),%eax
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# t <<<= 7
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rol $7,%edx
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# t ^= x14
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xorl 156(%esp),%edx
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# r <<<= 7
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rol $7,%esi
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# r ^= x9
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xorl 136(%esp),%esi
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# v <<<= 7
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rol $7,%edi
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# v ^= x3
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xorl 112(%esp),%edi
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# x4 = p
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movl %eax,116(%esp)
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# x14 = t
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movl %edx,156(%esp)
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# p += x0
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addl 100(%esp),%eax
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# x9 = r
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movl %esi,136(%esp)
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# t += x10
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addl 140(%esp),%edx
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# x3 = v
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movl %edi,112(%esp)
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# p <<<= 9
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rol $9,%eax
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# p ^= x8
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xorl 132(%esp),%eax
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# t <<<= 9
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rol $9,%edx
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# t ^= x2
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xorl 108(%esp),%edx
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# s += r
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add %esi,%ecx
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# s <<<= 9
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rol $9,%ecx
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# s ^= x13
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xorl 152(%esp),%ecx
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# w += v
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add %edi,%ebx
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# w <<<= 9
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rol $9,%ebx
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# w ^= x7
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xorl 128(%esp),%ebx
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# x8 = p
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movl %eax,132(%esp)
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# x2 = t
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movl %edx,108(%esp)
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# p += x4
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addl 116(%esp),%eax
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# x13 = s
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movl %ecx,152(%esp)
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# t += x14
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addl 156(%esp),%edx
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# x7 = w
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movl %ebx,128(%esp)
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# p <<<= 13
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rol $13,%eax
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# p ^= x12
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xorl 148(%esp),%eax
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# t <<<= 13
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rol $13,%edx
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# t ^= x6
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xorl 124(%esp),%edx
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# r += s
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add %ecx,%esi
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# r <<<= 13
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rol $13,%esi
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# r ^= x1
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xorl 104(%esp),%esi
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# v += w
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add %ebx,%edi
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# v <<<= 13
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rol $13,%edi
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# v ^= x11
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xorl 144(%esp),%edi
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# x12 = p
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movl %eax,148(%esp)
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# x6 = t
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movl %edx,124(%esp)
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# p += x8
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addl 132(%esp),%eax
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# x1 = r
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movl %esi,104(%esp)
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# t += x2
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addl 108(%esp),%edx
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# x11 = v
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movl %edi,144(%esp)
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# p <<<= 18
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rol $18,%eax
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# p ^= x0
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xorl 100(%esp),%eax
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# t <<<= 18
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rol $18,%edx
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# t ^= x10
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xorl 140(%esp),%edx
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# s += r
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add %esi,%ecx
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# s <<<= 18
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rol $18,%ecx
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# s ^= x5
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xorl 120(%esp),%ecx
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# w += v
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add %edi,%ebx
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# w <<<= 18
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rol $18,%ebx
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# w ^= x15
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xorl 160(%esp),%ebx
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# x0 = p
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movl %eax,100(%esp)
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# x10 = t
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movl %edx,140(%esp)
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# p += x3
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addl 112(%esp),%eax
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# p <<<= 7
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rol $7,%eax
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# x5 = s
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movl %ecx,120(%esp)
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# t += x9
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addl 136(%esp),%edx
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# x15 = w
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movl %ebx,160(%esp)
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# r = x4
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movl 116(%esp),%esi
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# r += s
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add %ecx,%esi
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# v = x14
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movl 156(%esp),%edi
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# v += w
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add %ebx,%edi
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# p ^= x1
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xorl 104(%esp),%eax
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# t <<<= 7
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rol $7,%edx
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# t ^= x11
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xorl 144(%esp),%edx
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# r <<<= 7
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rol $7,%esi
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# r ^= x6
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xorl 124(%esp),%esi
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# v <<<= 7
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rol $7,%edi
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# v ^= x12
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xorl 148(%esp),%edi
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# x1 = p
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movl %eax,104(%esp)
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# x11 = t
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movl %edx,144(%esp)
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# p += x0
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addl 100(%esp),%eax
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# x6 = r
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movl %esi,124(%esp)
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# t += x10
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addl 140(%esp),%edx
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# x12 = v
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movl %edi,148(%esp)
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# p <<<= 9
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rol $9,%eax
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# p ^= x2
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xorl 108(%esp),%eax
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# t <<<= 9
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rol $9,%edx
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# t ^= x8
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xorl 132(%esp),%edx
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# s += r
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add %esi,%ecx
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# s <<<= 9
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rol $9,%ecx
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# s ^= x7
|
||||
xorl 128(%esp),%ecx
|
||||
# w += v
|
||||
add %edi,%ebx
|
||||
# w <<<= 9
|
||||
rol $9,%ebx
|
||||
# w ^= x13
|
||||
xorl 152(%esp),%ebx
|
||||
# x2 = p
|
||||
movl %eax,108(%esp)
|
||||
# x8 = t
|
||||
movl %edx,132(%esp)
|
||||
# p += x1
|
||||
addl 104(%esp),%eax
|
||||
# x7 = s
|
||||
movl %ecx,128(%esp)
|
||||
# t += x11
|
||||
addl 144(%esp),%edx
|
||||
# x13 = w
|
||||
movl %ebx,152(%esp)
|
||||
# p <<<= 13
|
||||
rol $13,%eax
|
||||
# p ^= x3
|
||||
xorl 112(%esp),%eax
|
||||
# t <<<= 13
|
||||
rol $13,%edx
|
||||
# t ^= x9
|
||||
xorl 136(%esp),%edx
|
||||
# r += s
|
||||
add %ecx,%esi
|
||||
# r <<<= 13
|
||||
rol $13,%esi
|
||||
# r ^= x4
|
||||
xorl 116(%esp),%esi
|
||||
# v += w
|
||||
add %ebx,%edi
|
||||
# v <<<= 13
|
||||
rol $13,%edi
|
||||
# v ^= x14
|
||||
xorl 156(%esp),%edi
|
||||
# x3 = p
|
||||
movl %eax,112(%esp)
|
||||
# x9 = t
|
||||
movl %edx,136(%esp)
|
||||
# p += x2
|
||||
addl 108(%esp),%eax
|
||||
# x4 = r
|
||||
movl %esi,116(%esp)
|
||||
# t += x8
|
||||
addl 132(%esp),%edx
|
||||
# x14 = v
|
||||
movl %edi,156(%esp)
|
||||
# p <<<= 18
|
||||
rol $18,%eax
|
||||
# p ^= x0
|
||||
xorl 100(%esp),%eax
|
||||
# t <<<= 18
|
||||
rol $18,%edx
|
||||
# t ^= x10
|
||||
xorl 140(%esp),%edx
|
||||
# s += r
|
||||
add %esi,%ecx
|
||||
# s <<<= 18
|
||||
rol $18,%ecx
|
||||
# s ^= x5
|
||||
xorl 120(%esp),%ecx
|
||||
# w += v
|
||||
add %edi,%ebx
|
||||
# w <<<= 18
|
||||
rol $18,%ebx
|
||||
# w ^= x15
|
||||
xorl 160(%esp),%ebx
|
||||
# x0 = p
|
||||
movl %eax,100(%esp)
|
||||
# x10 = t
|
||||
movl %edx,140(%esp)
|
||||
# p += x12
|
||||
addl 148(%esp),%eax
|
||||
# x5 = s
|
||||
movl %ecx,120(%esp)
|
||||
# t += x6
|
||||
addl 124(%esp),%edx
|
||||
# x15 = w
|
||||
movl %ebx,160(%esp)
|
||||
# r = x1
|
||||
movl 104(%esp),%esi
|
||||
# r += s
|
||||
add %ecx,%esi
|
||||
# v = x11
|
||||
movl 144(%esp),%edi
|
||||
# v += w
|
||||
add %ebx,%edi
|
||||
# p <<<= 7
|
||||
rol $7,%eax
|
||||
# p ^= x4
|
||||
xorl 116(%esp),%eax
|
||||
# t <<<= 7
|
||||
rol $7,%edx
|
||||
# t ^= x14
|
||||
xorl 156(%esp),%edx
|
||||
# r <<<= 7
|
||||
rol $7,%esi
|
||||
# r ^= x9
|
||||
xorl 136(%esp),%esi
|
||||
# v <<<= 7
|
||||
rol $7,%edi
|
||||
# v ^= x3
|
||||
xorl 112(%esp),%edi
|
||||
# x4 = p
|
||||
movl %eax,116(%esp)
|
||||
# x14 = t
|
||||
movl %edx,156(%esp)
|
||||
# p += x0
|
||||
addl 100(%esp),%eax
|
||||
# x9 = r
|
||||
movl %esi,136(%esp)
|
||||
# t += x10
|
||||
addl 140(%esp),%edx
|
||||
# x3 = v
|
||||
movl %edi,112(%esp)
|
||||
# p <<<= 9
|
||||
rol $9,%eax
|
||||
# p ^= x8
|
||||
xorl 132(%esp),%eax
|
||||
# t <<<= 9
|
||||
rol $9,%edx
|
||||
# t ^= x2
|
||||
xorl 108(%esp),%edx
|
||||
# s += r
|
||||
add %esi,%ecx
|
||||
# s <<<= 9
|
||||
rol $9,%ecx
|
||||
# s ^= x13
|
||||
xorl 152(%esp),%ecx
|
||||
# w += v
|
||||
add %edi,%ebx
|
||||
# w <<<= 9
|
||||
rol $9,%ebx
|
||||
# w ^= x7
|
||||
xorl 128(%esp),%ebx
|
||||
# x8 = p
|
||||
movl %eax,132(%esp)
|
||||
# x2 = t
|
||||
movl %edx,108(%esp)
|
||||
# p += x4
|
||||
addl 116(%esp),%eax
|
||||
# x13 = s
|
||||
movl %ecx,152(%esp)
|
||||
# t += x14
|
||||
addl 156(%esp),%edx
|
||||
# x7 = w
|
||||
movl %ebx,128(%esp)
|
||||
# p <<<= 13
|
||||
rol $13,%eax
|
||||
# p ^= x12
|
||||
xorl 148(%esp),%eax
|
||||
# t <<<= 13
|
||||
rol $13,%edx
|
||||
# t ^= x6
|
||||
xorl 124(%esp),%edx
|
||||
# r += s
|
||||
add %ecx,%esi
|
||||
# r <<<= 13
|
||||
rol $13,%esi
|
||||
# r ^= x1
|
||||
xorl 104(%esp),%esi
|
||||
# v += w
|
||||
add %ebx,%edi
|
||||
# v <<<= 13
|
||||
rol $13,%edi
|
||||
# v ^= x11
|
||||
xorl 144(%esp),%edi
|
||||
# x12 = p
|
||||
movl %eax,148(%esp)
|
||||
# x6 = t
|
||||
movl %edx,124(%esp)
|
||||
# p += x8
|
||||
addl 132(%esp),%eax
|
||||
# x1 = r
|
||||
movl %esi,104(%esp)
|
||||
# t += x2
|
||||
addl 108(%esp),%edx
|
||||
# x11 = v
|
||||
movl %edi,144(%esp)
|
||||
# p <<<= 18
|
||||
rol $18,%eax
|
||||
# p ^= x0
|
||||
xorl 100(%esp),%eax
|
||||
# t <<<= 18
|
||||
rol $18,%edx
|
||||
# t ^= x10
|
||||
xorl 140(%esp),%edx
|
||||
# s += r
|
||||
add %esi,%ecx
|
||||
# s <<<= 18
|
||||
rol $18,%ecx
|
||||
# s ^= x5
|
||||
xorl 120(%esp),%ecx
|
||||
# w += v
|
||||
add %edi,%ebx
|
||||
# w <<<= 18
|
||||
rol $18,%ebx
|
||||
# w ^= x15
|
||||
xorl 160(%esp),%ebx
|
||||
# x0 = p
|
||||
movl %eax,100(%esp)
|
||||
# x10 = t
|
||||
movl %edx,140(%esp)
|
||||
# p += x3
|
||||
addl 112(%esp),%eax
|
||||
# p <<<= 7
|
||||
rol $7,%eax
|
||||
# x5 = s
|
||||
movl %ecx,120(%esp)
|
||||
# t += x9
|
||||
addl 136(%esp),%edx
|
||||
# x15 = w
|
||||
movl %ebx,160(%esp)
|
||||
# r = x4
|
||||
movl 116(%esp),%esi
|
||||
# r += s
|
||||
add %ecx,%esi
|
||||
# v = x14
|
||||
movl 156(%esp),%edi
|
||||
# v += w
|
||||
add %ebx,%edi
|
||||
# p ^= x1
|
||||
xorl 104(%esp),%eax
|
||||
# t <<<= 7
|
||||
rol $7,%edx
|
||||
# t ^= x11
|
||||
xorl 144(%esp),%edx
|
||||
# r <<<= 7
|
||||
rol $7,%esi
|
||||
# r ^= x6
|
||||
xorl 124(%esp),%esi
|
||||
# v <<<= 7
|
||||
rol $7,%edi
|
||||
# v ^= x12
|
||||
xorl 148(%esp),%edi
|
||||
# x1 = p
|
||||
movl %eax,104(%esp)
|
||||
# x11 = t
|
||||
movl %edx,144(%esp)
|
||||
# p += x0
|
||||
addl 100(%esp),%eax
|
||||
# x6 = r
|
||||
movl %esi,124(%esp)
|
||||
# t += x10
|
||||
addl 140(%esp),%edx
|
||||
# x12 = v
|
||||
movl %edi,148(%esp)
|
||||
# p <<<= 9
|
||||
rol $9,%eax
|
||||
# p ^= x2
|
||||
xorl 108(%esp),%eax
|
||||
# t <<<= 9
|
||||
rol $9,%edx
|
||||
# t ^= x8
|
||||
xorl 132(%esp),%edx
|
||||
# s += r
|
||||
add %esi,%ecx
|
||||
# s <<<= 9
|
||||
rol $9,%ecx
|
||||
# s ^= x7
|
||||
xorl 128(%esp),%ecx
|
||||
# w += v
|
||||
add %edi,%ebx
|
||||
# w <<<= 9
|
||||
rol $9,%ebx
|
||||
# w ^= x13
|
||||
xorl 152(%esp),%ebx
|
||||
# x2 = p
|
||||
movl %eax,108(%esp)
|
||||
# x8 = t
|
||||
movl %edx,132(%esp)
|
||||
# p += x1
|
||||
addl 104(%esp),%eax
|
||||
# x7 = s
|
||||
movl %ecx,128(%esp)
|
||||
# t += x11
|
||||
addl 144(%esp),%edx
|
||||
# x13 = w
|
||||
movl %ebx,152(%esp)
|
||||
# p <<<= 13
|
||||
rol $13,%eax
|
||||
# p ^= x3
|
||||
xorl 112(%esp),%eax
|
||||
# t <<<= 13
|
||||
rol $13,%edx
|
||||
# t ^= x9
|
||||
xorl 136(%esp),%edx
|
||||
# r += s
|
||||
add %ecx,%esi
|
||||
# r <<<= 13
|
||||
rol $13,%esi
|
||||
# r ^= x4
|
||||
xorl 116(%esp),%esi
|
||||
# v += w
|
||||
add %ebx,%edi
|
||||
# v <<<= 13
|
||||
rol $13,%edi
|
||||
# v ^= x14
|
||||
xorl 156(%esp),%edi
|
||||
# x3 = p
|
||||
movl %eax,112(%esp)
|
||||
# x9 = t
|
||||
movl %edx,136(%esp)
|
||||
# p += x2
|
||||
addl 108(%esp),%eax
|
||||
# x4 = r
|
||||
movl %esi,116(%esp)
|
||||
# t += x8
|
||||
addl 132(%esp),%edx
|
||||
# x14 = v
|
||||
movl %edi,156(%esp)
|
||||
# p <<<= 18
|
||||
rol $18,%eax
|
||||
# p ^= x0
|
||||
xorl 100(%esp),%eax
|
||||
# t <<<= 18
|
||||
rol $18,%edx
|
||||
# t ^= x10
|
||||
xorl 140(%esp),%edx
|
||||
# s += r
|
||||
add %esi,%ecx
|
||||
# s <<<= 18
|
||||
rol $18,%ecx
|
||||
# s ^= x5
|
||||
xorl 120(%esp),%ecx
|
||||
# w += v
|
||||
add %edi,%ebx
|
||||
# w <<<= 18
|
||||
rol $18,%ebx
|
||||
# w ^= x15
|
||||
xorl 160(%esp),%ebx
|
||||
# i -= 4
|
||||
sub $4,%ebp
|
||||
# goto mainloop if unsigned >
|
||||
ja ._mainloop
|
||||
# x0 = p
|
||||
movl %eax,100(%esp)
|
||||
# x5 = s
|
||||
movl %ecx,120(%esp)
|
||||
# x10 = t
|
||||
movl %edx,140(%esp)
|
||||
# x15 = w
|
||||
movl %ebx,160(%esp)
|
||||
# out = out_backup
|
||||
movl 72(%esp),%edi
|
||||
# m = m_backup
|
||||
movl 68(%esp),%esi
|
||||
# in0 = x0
|
||||
movl 100(%esp),%eax
|
||||
# in1 = x1
|
||||
movl 104(%esp),%ecx
|
||||
# in0 += j0
|
||||
addl 164(%esp),%eax
|
||||
# in1 += j1
|
||||
addl 168(%esp),%ecx
|
||||
# in0 ^= *(uint32 *) (m + 0)
|
||||
xorl 0(%esi),%eax
|
||||
# in1 ^= *(uint32 *) (m + 4)
|
||||
xorl 4(%esi),%ecx
|
||||
# *(uint32 *) (out + 0) = in0
|
||||
movl %eax,0(%edi)
|
||||
# *(uint32 *) (out + 4) = in1
|
||||
movl %ecx,4(%edi)
|
||||
# in2 = x2
|
||||
movl 108(%esp),%eax
|
||||
# in3 = x3
|
||||
movl 112(%esp),%ecx
|
||||
# in2 += j2
|
||||
addl 172(%esp),%eax
|
||||
# in3 += j3
|
||||
addl 176(%esp),%ecx
|
||||
# in2 ^= *(uint32 *) (m + 8)
|
||||
xorl 8(%esi),%eax
|
||||
# in3 ^= *(uint32 *) (m + 12)
|
||||
xorl 12(%esi),%ecx
|
||||
# *(uint32 *) (out + 8) = in2
|
||||
movl %eax,8(%edi)
|
||||
# *(uint32 *) (out + 12) = in3
|
||||
movl %ecx,12(%edi)
|
||||
# in4 = x4
|
||||
movl 116(%esp),%eax
|
||||
# in5 = x5
|
||||
movl 120(%esp),%ecx
|
||||
# in4 += j4
|
||||
addl 180(%esp),%eax
|
||||
# in5 += j5
|
||||
addl 184(%esp),%ecx
|
||||
# in4 ^= *(uint32 *) (m + 16)
|
||||
xorl 16(%esi),%eax
|
||||
# in5 ^= *(uint32 *) (m + 20)
|
||||
xorl 20(%esi),%ecx
|
||||
# *(uint32 *) (out + 16) = in4
|
||||
movl %eax,16(%edi)
|
||||
# *(uint32 *) (out + 20) = in5
|
||||
movl %ecx,20(%edi)
|
||||
# in6 = x6
|
||||
movl 124(%esp),%eax
|
||||
# in7 = x7
|
||||
movl 128(%esp),%ecx
|
||||
# in6 += j6
|
||||
addl 188(%esp),%eax
|
||||
# in7 += j7
|
||||
addl 192(%esp),%ecx
|
||||
# in6 ^= *(uint32 *) (m + 24)
|
||||
xorl 24(%esi),%eax
|
||||
# in7 ^= *(uint32 *) (m + 28)
|
||||
xorl 28(%esi),%ecx
|
||||
# *(uint32 *) (out + 24) = in6
|
||||
movl %eax,24(%edi)
|
||||
# *(uint32 *) (out + 28) = in7
|
||||
movl %ecx,28(%edi)
|
||||
# in8 = x8
|
||||
movl 132(%esp),%eax
|
||||
# in9 = x9
|
||||
movl 136(%esp),%ecx
|
||||
# in8 += j8
|
||||
addl 196(%esp),%eax
|
||||
# in9 += j9
|
||||
addl 200(%esp),%ecx
|
||||
# in8 ^= *(uint32 *) (m + 32)
|
||||
xorl 32(%esi),%eax
|
||||
# in9 ^= *(uint32 *) (m + 36)
|
||||
xorl 36(%esi),%ecx
|
||||
# *(uint32 *) (out + 32) = in8
|
||||
movl %eax,32(%edi)
|
||||
# *(uint32 *) (out + 36) = in9
|
||||
movl %ecx,36(%edi)
|
||||
# in10 = x10
|
||||
movl 140(%esp),%eax
|
||||
# in11 = x11
|
||||
movl 144(%esp),%ecx
|
||||
# in10 += j10
|
||||
addl 204(%esp),%eax
|
||||
# in11 += j11
|
||||
addl 208(%esp),%ecx
|
||||
# in10 ^= *(uint32 *) (m + 40)
|
||||
xorl 40(%esi),%eax
|
||||
# in11 ^= *(uint32 *) (m + 44)
|
||||
xorl 44(%esi),%ecx
|
||||
# *(uint32 *) (out + 40) = in10
|
||||
movl %eax,40(%edi)
|
||||
# *(uint32 *) (out + 44) = in11
|
||||
movl %ecx,44(%edi)
|
||||
# in12 = x12
|
||||
movl 148(%esp),%eax
|
||||
# in13 = x13
|
||||
movl 152(%esp),%ecx
|
||||
# in12 += j12
|
||||
addl 212(%esp),%eax
|
||||
# in13 += j13
|
||||
addl 216(%esp),%ecx
|
||||
# in12 ^= *(uint32 *) (m + 48)
|
||||
xorl 48(%esi),%eax
|
||||
# in13 ^= *(uint32 *) (m + 52)
|
||||
xorl 52(%esi),%ecx
|
||||
# *(uint32 *) (out + 48) = in12
|
||||
movl %eax,48(%edi)
|
||||
# *(uint32 *) (out + 52) = in13
|
||||
movl %ecx,52(%edi)
|
||||
# in14 = x14
|
||||
movl 156(%esp),%eax
|
||||
# in15 = x15
|
||||
movl 160(%esp),%ecx
|
||||
# in14 += j14
|
||||
addl 220(%esp),%eax
|
||||
# in15 += j15
|
||||
addl 224(%esp),%ecx
|
||||
# in14 ^= *(uint32 *) (m + 56)
|
||||
xorl 56(%esi),%eax
|
||||
# in15 ^= *(uint32 *) (m + 60)
|
||||
xorl 60(%esi),%ecx
|
||||
# *(uint32 *) (out + 56) = in14
|
||||
movl %eax,56(%edi)
|
||||
# *(uint32 *) (out + 60) = in15
|
||||
movl %ecx,60(%edi)
|
||||
# bytes = bytes_backup
|
||||
movl 76(%esp),%ebx
|
||||
# in8 = j8
|
||||
movl 196(%esp),%eax
|
||||
# in9 = j9
|
||||
movl 200(%esp),%ecx
|
||||
# in8 += 1
|
||||
add $1,%eax
|
||||
# in9 += 0 + carry
|
||||
adc $0,%ecx
|
||||
# j8 = in8
|
||||
movl %eax,196(%esp)
|
||||
# j9 = in9
|
||||
movl %ecx,200(%esp)
|
||||
# bytes - 64
|
||||
cmp $64,%ebx
|
||||
# goto bytesatleast65 if unsigned>
|
||||
ja ._bytesatleast65
|
||||
# goto bytesatleast64 if unsigned>=
|
||||
jae ._bytesatleast64
|
||||
# m = out
|
||||
mov %edi,%esi
|
||||
# out = ctarget
|
||||
movl 228(%esp),%edi
|
||||
# i = bytes
|
||||
mov %ebx,%ecx
|
||||
# while (i) { *out++ = *m++; --i }
|
||||
rep movsb
|
||||
._bytesatleast64:
|
||||
# x = x_backup
|
||||
movl 64(%esp),%eax
|
||||
# in8 = j8
|
||||
movl 196(%esp),%ecx
|
||||
# in9 = j9
|
||||
movl 200(%esp),%edx
|
||||
# *(uint32 *) (x + 32) = in8
|
||||
movl %ecx,32(%eax)
|
||||
# *(uint32 *) (x + 36) = in9
|
||||
movl %edx,36(%eax)
|
||||
._done:
|
||||
# eax = eax_stack
|
||||
movl 80(%esp),%eax
|
||||
# ebx = ebx_stack
|
||||
movl 84(%esp),%ebx
|
||||
# esi = esi_stack
|
||||
movl 88(%esp),%esi
|
||||
# edi = edi_stack
|
||||
movl 92(%esp),%edi
|
||||
# ebp = ebp_stack
|
||||
movl 96(%esp),%ebp
|
||||
# leave
|
||||
add %eax,%esp
|
||||
ret
|
||||
._bytesatleast65:
|
||||
# bytes -= 64
|
||||
sub $64,%ebx
|
||||
# out += 64
|
||||
add $64,%edi
|
||||
# m += 64
|
||||
add $64,%esi
|
||||
# goto bytesatleast1
|
||||
jmp ._bytesatleast1
|
||||
ENDPROC(salsa20_encrypt_bytes)
|
||||
|
|
@ -1,805 +0,0 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#include <linux/linkage.h>
|
||||
|
||||
# enter salsa20_encrypt_bytes
|
||||
ENTRY(salsa20_encrypt_bytes)
|
||||
mov %rsp,%r11
|
||||
and $31,%r11
|
||||
add $256,%r11
|
||||
sub %r11,%rsp
|
||||
# x = arg1
|
||||
mov %rdi,%r8
|
||||
# m = arg2
|
||||
mov %rsi,%rsi
|
||||
# out = arg3
|
||||
mov %rdx,%rdi
|
||||
# bytes = arg4
|
||||
mov %rcx,%rdx
|
||||
# unsigned>? bytes - 0
|
||||
cmp $0,%rdx
|
||||
# comment:fp stack unchanged by jump
|
||||
# goto done if !unsigned>
|
||||
jbe ._done
|
||||
# comment:fp stack unchanged by fallthrough
|
||||
# start:
|
||||
._start:
|
||||
# r11_stack = r11
|
||||
movq %r11,0(%rsp)
|
||||
# r12_stack = r12
|
||||
movq %r12,8(%rsp)
|
||||
# r13_stack = r13
|
||||
movq %r13,16(%rsp)
|
||||
# r14_stack = r14
|
||||
movq %r14,24(%rsp)
|
||||
# r15_stack = r15
|
||||
movq %r15,32(%rsp)
|
||||
# rbx_stack = rbx
|
||||
movq %rbx,40(%rsp)
|
||||
# rbp_stack = rbp
|
||||
movq %rbp,48(%rsp)
|
||||
# in0 = *(uint64 *) (x + 0)
|
||||
movq 0(%r8),%rcx
|
||||
# in2 = *(uint64 *) (x + 8)
|
||||
movq 8(%r8),%r9
|
||||
# in4 = *(uint64 *) (x + 16)
|
||||
movq 16(%r8),%rax
|
||||
# in6 = *(uint64 *) (x + 24)
|
||||
movq 24(%r8),%r10
|
||||
# in8 = *(uint64 *) (x + 32)
|
||||
movq 32(%r8),%r11
|
||||
# in10 = *(uint64 *) (x + 40)
|
||||
movq 40(%r8),%r12
|
||||
# in12 = *(uint64 *) (x + 48)
|
||||
movq 48(%r8),%r13
|
||||
# in14 = *(uint64 *) (x + 56)
|
||||
movq 56(%r8),%r14
|
||||
# j0 = in0
|
||||
movq %rcx,56(%rsp)
|
||||
# j2 = in2
|
||||
movq %r9,64(%rsp)
|
||||
# j4 = in4
|
||||
movq %rax,72(%rsp)
|
||||
# j6 = in6
|
||||
movq %r10,80(%rsp)
|
||||
# j8 = in8
|
||||
movq %r11,88(%rsp)
|
||||
# j10 = in10
|
||||
movq %r12,96(%rsp)
|
||||
# j12 = in12
|
||||
movq %r13,104(%rsp)
|
||||
# j14 = in14
|
||||
movq %r14,112(%rsp)
|
||||
# x_backup = x
|
||||
movq %r8,120(%rsp)
|
||||
# bytesatleast1:
|
||||
._bytesatleast1:
|
||||
# unsigned<? bytes - 64
|
||||
cmp $64,%rdx
|
||||
# comment:fp stack unchanged by jump
|
||||
# goto nocopy if !unsigned<
|
||||
jae ._nocopy
|
||||
# ctarget = out
|
||||
movq %rdi,128(%rsp)
|
||||
# out = &tmp
|
||||
leaq 192(%rsp),%rdi
|
||||
# i = bytes
|
||||
mov %rdx,%rcx
|
||||
# while (i) { *out++ = *m++; --i }
|
||||
rep movsb
|
||||
# out = &tmp
|
||||
leaq 192(%rsp),%rdi
|
||||
# m = &tmp
|
||||
leaq 192(%rsp),%rsi
|
||||
# comment:fp stack unchanged by fallthrough
|
||||
# nocopy:
|
||||
._nocopy:
|
||||
# out_backup = out
|
||||
movq %rdi,136(%rsp)
|
||||
# m_backup = m
|
||||
movq %rsi,144(%rsp)
|
||||
# bytes_backup = bytes
|
||||
movq %rdx,152(%rsp)
|
||||
# x1 = j0
|
||||
movq 56(%rsp),%rdi
|
||||
# x0 = x1
|
||||
mov %rdi,%rdx
|
||||
# (uint64) x1 >>= 32
|
||||
shr $32,%rdi
|
||||
# x3 = j2
|
||||
movq 64(%rsp),%rsi
|
||||
# x2 = x3
|
||||
mov %rsi,%rcx
|
||||
# (uint64) x3 >>= 32
|
||||
shr $32,%rsi
|
||||
# x5 = j4
|
||||
movq 72(%rsp),%r8
|
||||
# x4 = x5
|
||||
mov %r8,%r9
|
||||
# (uint64) x5 >>= 32
|
||||
shr $32,%r8
|
||||
# x5_stack = x5
|
||||
movq %r8,160(%rsp)
|
||||
# x7 = j6
|
||||
movq 80(%rsp),%r8
|
||||
# x6 = x7
|
||||
mov %r8,%rax
|
||||
# (uint64) x7 >>= 32
|
||||
shr $32,%r8
|
||||
# x9 = j8
|
||||
movq 88(%rsp),%r10
|
||||
# x8 = x9
|
||||
mov %r10,%r11
|
||||
# (uint64) x9 >>= 32
|
||||
shr $32,%r10
|
||||
# x11 = j10
|
||||
movq 96(%rsp),%r12
|
||||
# x10 = x11
|
||||
mov %r12,%r13
|
||||
# x10_stack = x10
|
||||
movq %r13,168(%rsp)
|
||||
# (uint64) x11 >>= 32
|
||||
shr $32,%r12
|
||||
# x13 = j12
|
||||
movq 104(%rsp),%r13
|
||||
# x12 = x13
|
||||
mov %r13,%r14
|
||||
# (uint64) x13 >>= 32
|
||||
shr $32,%r13
|
||||
# x15 = j14
|
||||
movq 112(%rsp),%r15
|
||||
# x14 = x15
|
||||
mov %r15,%rbx
|
||||
# (uint64) x15 >>= 32
|
||||
shr $32,%r15
|
||||
# x15_stack = x15
|
||||
movq %r15,176(%rsp)
|
||||
# i = 20
|
||||
mov $20,%r15
|
||||
# mainloop:
|
||||
._mainloop:
|
||||
# i_backup = i
|
||||
movq %r15,184(%rsp)
|
||||
# x5 = x5_stack
|
||||
movq 160(%rsp),%r15
|
||||
# a = x12 + x0
|
||||
lea (%r14,%rdx),%rbp
|
||||
# (uint32) a <<<= 7
|
||||
rol $7,%ebp
|
||||
# x4 ^= a
|
||||
xor %rbp,%r9
|
||||
# b = x1 + x5
|
||||
lea (%rdi,%r15),%rbp
|
||||
# (uint32) b <<<= 7
|
||||
rol $7,%ebp
|
||||
# x9 ^= b
|
||||
xor %rbp,%r10
|
||||
# a = x0 + x4
|
||||
lea (%rdx,%r9),%rbp
|
||||
# (uint32) a <<<= 9
|
||||
rol $9,%ebp
|
||||
# x8 ^= a
|
||||
xor %rbp,%r11
|
||||
# b = x5 + x9
|
||||
lea (%r15,%r10),%rbp
|
||||
# (uint32) b <<<= 9
|
||||
rol $9,%ebp
|
||||
# x13 ^= b
|
||||
xor %rbp,%r13
|
||||
# a = x4 + x8
|
||||
lea (%r9,%r11),%rbp
|
||||
# (uint32) a <<<= 13
|
||||
rol $13,%ebp
|
||||
# x12 ^= a
|
||||
xor %rbp,%r14
|
||||
# b = x9 + x13
|
||||
lea (%r10,%r13),%rbp
|
||||
# (uint32) b <<<= 13
|
||||
rol $13,%ebp
|
||||
# x1 ^= b
|
||||
xor %rbp,%rdi
|
||||
# a = x8 + x12
|
||||
lea (%r11,%r14),%rbp
|
||||
# (uint32) a <<<= 18
|
||||
rol $18,%ebp
|
||||
# x0 ^= a
|
||||
xor %rbp,%rdx
|
||||
# b = x13 + x1
|
||||
lea (%r13,%rdi),%rbp
|
||||
# (uint32) b <<<= 18
|
||||
rol $18,%ebp
|
||||
# x5 ^= b
|
||||
xor %rbp,%r15
|
||||
# x10 = x10_stack
|
||||
movq 168(%rsp),%rbp
|
||||
# x5_stack = x5
|
||||
movq %r15,160(%rsp)
|
||||
# c = x6 + x10
|
||||
lea (%rax,%rbp),%r15
|
||||
# (uint32) c <<<= 7
|
||||
rol $7,%r15d
|
||||
# x14 ^= c
|
||||
xor %r15,%rbx
|
||||
# c = x10 + x14
|
||||
lea (%rbp,%rbx),%r15
|
||||
# (uint32) c <<<= 9
|
||||
rol $9,%r15d
|
||||
# x2 ^= c
|
||||
xor %r15,%rcx
|
||||
# c = x14 + x2
|
||||
lea (%rbx,%rcx),%r15
|
||||
# (uint32) c <<<= 13
|
||||
rol $13,%r15d
|
||||
# x6 ^= c
|
||||
xor %r15,%rax
|
||||
# c = x2 + x6
|
||||
lea (%rcx,%rax),%r15
|
||||
# (uint32) c <<<= 18
|
||||
rol $18,%r15d
|
||||
# x10 ^= c
|
||||
xor %r15,%rbp
|
||||
# x15 = x15_stack
|
||||
movq 176(%rsp),%r15
|
||||
# x10_stack = x10
|
||||
movq %rbp,168(%rsp)
|
||||
# d = x11 + x15
|
||||
lea (%r12,%r15),%rbp
|
||||
# (uint32) d <<<= 7
|
||||
rol $7,%ebp
|
||||
# x3 ^= d
|
||||
xor %rbp,%rsi
|
||||
# d = x15 + x3
|
||||
lea (%r15,%rsi),%rbp
|
||||
# (uint32) d <<<= 9
|
||||
rol $9,%ebp
|
||||
# x7 ^= d
|
||||
xor %rbp,%r8
|
||||
# d = x3 + x7
|
||||
lea (%rsi,%r8),%rbp
|
||||
# (uint32) d <<<= 13
|
||||
rol $13,%ebp
|
||||
# x11 ^= d
|
||||
xor %rbp,%r12
|
||||
# d = x7 + x11
|
||||
lea (%r8,%r12),%rbp
|
||||
# (uint32) d <<<= 18
|
||||
rol $18,%ebp
|
||||
# x15 ^= d
|
||||
xor %rbp,%r15
|
||||
# x15_stack = x15
|
||||
movq %r15,176(%rsp)
|
||||
# x5 = x5_stack
|
||||
movq 160(%rsp),%r15
|
||||
# a = x3 + x0
|
||||
lea (%rsi,%rdx),%rbp
|
||||
# (uint32) a <<<= 7
|
||||
rol $7,%ebp
|
||||
# x1 ^= a
|
||||
xor %rbp,%rdi
|
||||
# b = x4 + x5
|
||||
lea (%r9,%r15),%rbp
|
||||
# (uint32) b <<<= 7
|
||||
rol $7,%ebp
|
||||
# x6 ^= b
|
||||
xor %rbp,%rax
|
||||
# a = x0 + x1
|
||||
lea (%rdx,%rdi),%rbp
|
||||
# (uint32) a <<<= 9
|
||||
rol $9,%ebp
|
||||
# x2 ^= a
|
||||
xor %rbp,%rcx
|
||||
# b = x5 + x6
|
||||
lea (%r15,%rax),%rbp
|
||||
# (uint32) b <<<= 9
|
||||
rol $9,%ebp
|
||||
# x7 ^= b
|
||||
xor %rbp,%r8
|
||||
# a = x1 + x2
|
||||
lea (%rdi,%rcx),%rbp
|
||||
# (uint32) a <<<= 13
|
||||
rol $13,%ebp
|
||||
# x3 ^= a
|
||||
xor %rbp,%rsi
|
||||
# b = x6 + x7
|
||||
lea (%rax,%r8),%rbp
|
||||
# (uint32) b <<<= 13
|
||||
rol $13,%ebp
|
||||
# x4 ^= b
|
||||
xor %rbp,%r9
|
||||
# a = x2 + x3
|
||||
lea (%rcx,%rsi),%rbp
|
||||
# (uint32) a <<<= 18
|
||||
rol $18,%ebp
|
||||
# x0 ^= a
|
||||
xor %rbp,%rdx
|
||||
# b = x7 + x4
|
||||
lea (%r8,%r9),%rbp
|
||||
# (uint32) b <<<= 18
|
||||
rol $18,%ebp
|
||||
# x5 ^= b
|
||||
xor %rbp,%r15
|
||||
# x10 = x10_stack
|
||||
movq 168(%rsp),%rbp
|
||||
# x5_stack = x5
|
||||
movq %r15,160(%rsp)
|
||||
# c = x9 + x10
|
||||
lea (%r10,%rbp),%r15
|
||||
# (uint32) c <<<= 7
|
||||
rol $7,%r15d
|
||||
# x11 ^= c
|
||||
xor %r15,%r12
|
||||
# c = x10 + x11
|
||||
lea (%rbp,%r12),%r15
|
||||
# (uint32) c <<<= 9
|
||||
rol $9,%r15d
|
||||
# x8 ^= c
|
||||
xor %r15,%r11
|
||||
# c = x11 + x8
|
||||
lea (%r12,%r11),%r15
|
||||
# (uint32) c <<<= 13
|
||||
rol $13,%r15d
|
||||
# x9 ^= c
|
||||
xor %r15,%r10
|
||||
# c = x8 + x9
|
||||
lea (%r11,%r10),%r15
|
||||
# (uint32) c <<<= 18
|
||||
rol $18,%r15d
|
||||
# x10 ^= c
|
||||
xor %r15,%rbp
|
||||
# x15 = x15_stack
|
||||
movq 176(%rsp),%r15
|
||||
# x10_stack = x10
|
||||
movq %rbp,168(%rsp)
|
||||
# d = x14 + x15
|
||||
lea (%rbx,%r15),%rbp
|
||||
# (uint32) d <<<= 7
|
||||
rol $7,%ebp
|
||||
# x12 ^= d
|
||||
xor %rbp,%r14
|
||||
# d = x15 + x12
|
||||
lea (%r15,%r14),%rbp
|
||||
# (uint32) d <<<= 9
|
||||
rol $9,%ebp
|
||||
# x13 ^= d
|
||||
xor %rbp,%r13
|
||||
# d = x12 + x13
|
||||
lea (%r14,%r13),%rbp
|
||||
# (uint32) d <<<= 13
|
||||
rol $13,%ebp
|
||||
# x14 ^= d
|
||||
xor %rbp,%rbx
|
||||
# d = x13 + x14
|
||||
lea (%r13,%rbx),%rbp
|
||||
# (uint32) d <<<= 18
|
||||
rol $18,%ebp
|
||||
# x15 ^= d
|
||||
xor %rbp,%r15
|
||||
# x15_stack = x15
|
||||
movq %r15,176(%rsp)
|
||||
# x5 = x5_stack
|
||||
movq 160(%rsp),%r15
|
||||
# a = x12 + x0
|
||||
lea (%r14,%rdx),%rbp
|
||||
# (uint32) a <<<= 7
|
||||
rol $7,%ebp
|
||||
# x4 ^= a
|
||||
xor %rbp,%r9
|
||||
# b = x1 + x5
|
||||
lea (%rdi,%r15),%rbp
|
||||
# (uint32) b <<<= 7
|
||||
rol $7,%ebp
|
||||
# x9 ^= b
|
||||
xor %rbp,%r10
|
||||
# a = x0 + x4
|
||||
lea (%rdx,%r9),%rbp
|
||||
# (uint32) a <<<= 9
|
||||
rol $9,%ebp
|
||||
# x8 ^= a
|
||||
xor %rbp,%r11
|
||||
# b = x5 + x9
|
||||
lea (%r15,%r10),%rbp
|
||||
# (uint32) b <<<= 9
|
||||
rol $9,%ebp
|
||||
# x13 ^= b
|
||||
xor %rbp,%r13
|
||||
# a = x4 + x8
|
||||
lea (%r9,%r11),%rbp
|
||||
# (uint32) a <<<= 13
|
||||
rol $13,%ebp
|
||||
# x12 ^= a
|
||||
xor %rbp,%r14
|
||||
# b = x9 + x13
|
||||
lea (%r10,%r13),%rbp
|
||||
# (uint32) b <<<= 13
|
||||
rol $13,%ebp
|
||||
# x1 ^= b
|
||||
xor %rbp,%rdi
|
||||
# a = x8 + x12
|
||||
lea (%r11,%r14),%rbp
|
||||
# (uint32) a <<<= 18
|
||||
rol $18,%ebp
|
||||
# x0 ^= a
|
||||
xor %rbp,%rdx
|
||||
# b = x13 + x1
|
||||
lea (%r13,%rdi),%rbp
|
||||
# (uint32) b <<<= 18
|
||||
rol $18,%ebp
|
||||
# x5 ^= b
|
||||
xor %rbp,%r15
|
||||
# x10 = x10_stack
|
||||
movq 168(%rsp),%rbp
|
||||
# x5_stack = x5
|
||||
movq %r15,160(%rsp)
|
||||
# c = x6 + x10
|
||||
lea (%rax,%rbp),%r15
|
||||
# (uint32) c <<<= 7
|
||||
rol $7,%r15d
|
||||
# x14 ^= c
|
||||
xor %r15,%rbx
|
||||
# c = x10 + x14
|
||||
lea (%rbp,%rbx),%r15
|
||||
# (uint32) c <<<= 9
|
||||
rol $9,%r15d
|
||||
# x2 ^= c
|
||||
xor %r15,%rcx
|
||||
# c = x14 + x2
|
||||
lea (%rbx,%rcx),%r15
|
||||
# (uint32) c <<<= 13
|
||||
rol $13,%r15d
|
||||
# x6 ^= c
|
||||
xor %r15,%rax
|
||||
# c = x2 + x6
|
||||
lea (%rcx,%rax),%r15
|
||||
# (uint32) c <<<= 18
|
||||
rol $18,%r15d
|
||||
# x10 ^= c
|
||||
xor %r15,%rbp
|
||||
# x15 = x15_stack
|
||||
movq 176(%rsp),%r15
|
||||
# x10_stack = x10
|
||||
movq %rbp,168(%rsp)
|
||||
# d = x11 + x15
|
||||
lea (%r12,%r15),%rbp
|
||||
# (uint32) d <<<= 7
|
||||
rol $7,%ebp
|
||||
# x3 ^= d
|
||||
xor %rbp,%rsi
|
||||
# d = x15 + x3
|
||||
lea (%r15,%rsi),%rbp
|
||||
# (uint32) d <<<= 9
|
||||
rol $9,%ebp
|
||||
# x7 ^= d
|
||||
xor %rbp,%r8
|
||||
# d = x3 + x7
|
||||
lea (%rsi,%r8),%rbp
|
||||
# (uint32) d <<<= 13
|
||||
rol $13,%ebp
|
||||
# x11 ^= d
|
||||
xor %rbp,%r12
|
||||
# d = x7 + x11
|
||||
lea (%r8,%r12),%rbp
|
||||
# (uint32) d <<<= 18
|
||||
rol $18,%ebp
|
||||
# x15 ^= d
|
||||
xor %rbp,%r15
|
||||
# x15_stack = x15
|
||||
movq %r15,176(%rsp)
|
||||
# x5 = x5_stack
|
||||
movq 160(%rsp),%r15
|
||||
# a = x3 + x0
|
||||
lea (%rsi,%rdx),%rbp
|
||||
# (uint32) a <<<= 7
|
||||
rol $7,%ebp
|
||||
# x1 ^= a
|
||||
xor %rbp,%rdi
|
||||
# b = x4 + x5
|
||||
lea (%r9,%r15),%rbp
|
||||
# (uint32) b <<<= 7
|
||||
rol $7,%ebp
|
||||
# x6 ^= b
|
||||
xor %rbp,%rax
|
||||
# a = x0 + x1
|
||||
lea (%rdx,%rdi),%rbp
|
||||
# (uint32) a <<<= 9
|
||||
rol $9,%ebp
|
||||
# x2 ^= a
|
||||
xor %rbp,%rcx
|
||||
# b = x5 + x6
|
||||
lea (%r15,%rax),%rbp
|
||||
# (uint32) b <<<= 9
|
||||
rol $9,%ebp
|
||||
# x7 ^= b
|
||||
xor %rbp,%r8
|
||||
# a = x1 + x2
|
||||
lea (%rdi,%rcx),%rbp
|
||||
# (uint32) a <<<= 13
|
||||
rol $13,%ebp
|
||||
# x3 ^= a
|
||||
xor %rbp,%rsi
|
||||
# b = x6 + x7
|
||||
lea (%rax,%r8),%rbp
|
||||
# (uint32) b <<<= 13
|
||||
rol $13,%ebp
|
||||
# x4 ^= b
|
||||
xor %rbp,%r9
|
||||
# a = x2 + x3
|
||||
lea (%rcx,%rsi),%rbp
|
||||
# (uint32) a <<<= 18
|
||||
rol $18,%ebp
|
||||
# x0 ^= a
|
||||
xor %rbp,%rdx
|
||||
# b = x7 + x4
|
||||
lea (%r8,%r9),%rbp
|
||||
# (uint32) b <<<= 18
|
||||
rol $18,%ebp
|
||||
# x5 ^= b
|
||||
xor %rbp,%r15
|
||||
# x10 = x10_stack
|
||||
movq 168(%rsp),%rbp
|
||||
# x5_stack = x5
|
||||
movq %r15,160(%rsp)
|
||||
# c = x9 + x10
|
||||
lea (%r10,%rbp),%r15
|
||||
# (uint32) c <<<= 7
|
||||
rol $7,%r15d
|
||||
# x11 ^= c
|
||||
xor %r15,%r12
|
||||
# c = x10 + x11
|
||||
lea (%rbp,%r12),%r15
|
||||
# (uint32) c <<<= 9
|
||||
rol $9,%r15d
|
||||
# x8 ^= c
|
||||
xor %r15,%r11
|
||||
# c = x11 + x8
|
||||
lea (%r12,%r11),%r15
|
||||
# (uint32) c <<<= 13
|
||||
rol $13,%r15d
|
||||
# x9 ^= c
|
||||
xor %r15,%r10
|
||||
# c = x8 + x9
|
||||
lea (%r11,%r10),%r15
|
||||
# (uint32) c <<<= 18
|
||||
rol $18,%r15d
|
||||
# x10 ^= c
|
||||
xor %r15,%rbp
|
||||
# x15 = x15_stack
|
||||
movq 176(%rsp),%r15
|
||||
# x10_stack = x10
|
||||
movq %rbp,168(%rsp)
|
||||
# d = x14 + x15
|
||||
lea (%rbx,%r15),%rbp
|
||||
# (uint32) d <<<= 7
|
||||
rol $7,%ebp
|
||||
# x12 ^= d
|
||||
xor %rbp,%r14
|
||||
# d = x15 + x12
|
||||
lea (%r15,%r14),%rbp
|
||||
# (uint32) d <<<= 9
|
||||
rol $9,%ebp
|
||||
# x13 ^= d
|
||||
xor %rbp,%r13
|
||||
# d = x12 + x13
|
||||
lea (%r14,%r13),%rbp
|
||||
# (uint32) d <<<= 13
|
||||
rol $13,%ebp
|
||||
# x14 ^= d
|
||||
xor %rbp,%rbx
|
||||
# d = x13 + x14
|
||||
lea (%r13,%rbx),%rbp
|
||||
# (uint32) d <<<= 18
|
||||
rol $18,%ebp
|
||||
# x15 ^= d
|
||||
xor %rbp,%r15
|
||||
# x15_stack = x15
|
||||
movq %r15,176(%rsp)
|
||||
# i = i_backup
|
||||
movq 184(%rsp),%r15
|
||||
# unsigned>? i -= 4
|
||||
sub $4,%r15
|
||||
# comment:fp stack unchanged by jump
|
||||
# goto mainloop if unsigned>
|
||||
ja ._mainloop
|
||||
# (uint32) x2 += j2
|
||||
addl 64(%rsp),%ecx
|
||||
# x3 <<= 32
|
||||
shl $32,%rsi
|
||||
# x3 += j2
|
||||
addq 64(%rsp),%rsi
|
||||
# (uint64) x3 >>= 32
|
||||
shr $32,%rsi
|
||||
# x3 <<= 32
|
||||
shl $32,%rsi
|
||||
# x2 += x3
|
||||
add %rsi,%rcx
|
||||
# (uint32) x6 += j6
|
||||
addl 80(%rsp),%eax
|
||||
# x7 <<= 32
|
||||
shl $32,%r8
|
||||
# x7 += j6
|
||||
addq 80(%rsp),%r8
|
||||
# (uint64) x7 >>= 32
|
||||
shr $32,%r8
|
||||
# x7 <<= 32
|
||||
shl $32,%r8
|
||||
# x6 += x7
|
||||
add %r8,%rax
|
||||
# (uint32) x8 += j8
|
||||
addl 88(%rsp),%r11d
|
||||
# x9 <<= 32
|
||||
shl $32,%r10
|
||||
# x9 += j8
|
||||
addq 88(%rsp),%r10
|
||||
# (uint64) x9 >>= 32
|
||||
shr $32,%r10
|
||||
# x9 <<= 32
|
||||
shl $32,%r10
|
||||
# x8 += x9
|
||||
add %r10,%r11
|
||||
# (uint32) x12 += j12
|
||||
addl 104(%rsp),%r14d
|
||||
# x13 <<= 32
|
||||
shl $32,%r13
|
||||
# x13 += j12
|
||||
addq 104(%rsp),%r13
|
||||
# (uint64) x13 >>= 32
|
||||
shr $32,%r13
|
||||
# x13 <<= 32
|
||||
shl $32,%r13
|
||||
# x12 += x13
|
||||
add %r13,%r14
|
||||
# (uint32) x0 += j0
|
||||
addl 56(%rsp),%edx
|
||||
# x1 <<= 32
|
||||
shl $32,%rdi
|
||||
# x1 += j0
|
||||
addq 56(%rsp),%rdi
|
||||
# (uint64) x1 >>= 32
|
||||
shr $32,%rdi
|
||||
# x1 <<= 32
|
||||
shl $32,%rdi
|
||||
# x0 += x1
|
||||
add %rdi,%rdx
|
||||
# x5 = x5_stack
|
||||
movq 160(%rsp),%rdi
|
||||
# (uint32) x4 += j4
|
||||
addl 72(%rsp),%r9d
|
||||
# x5 <<= 32
|
||||
shl $32,%rdi
|
||||
# x5 += j4
|
||||
addq 72(%rsp),%rdi
|
||||
# (uint64) x5 >>= 32
|
||||
shr $32,%rdi
|
||||
# x5 <<= 32
|
||||
shl $32,%rdi
|
||||
# x4 += x5
|
||||
add %rdi,%r9
|
||||
# x10 = x10_stack
|
||||
movq 168(%rsp),%r8
|
||||
# (uint32) x10 += j10
|
||||
addl 96(%rsp),%r8d
|
||||
# x11 <<= 32
|
||||
shl $32,%r12
|
||||
# x11 += j10
|
||||
addq 96(%rsp),%r12
|
||||
# (uint64) x11 >>= 32
|
||||
shr $32,%r12
|
||||
# x11 <<= 32
|
||||
shl $32,%r12
|
||||
# x10 += x11
|
||||
add %r12,%r8
|
||||
# x15 = x15_stack
|
||||
movq 176(%rsp),%rdi
|
||||
# (uint32) x14 += j14
|
||||
addl 112(%rsp),%ebx
|
||||
# x15 <<= 32
|
||||
shl $32,%rdi
|
||||
# x15 += j14
|
||||
addq 112(%rsp),%rdi
|
||||
# (uint64) x15 >>= 32
|
||||
shr $32,%rdi
|
||||
# x15 <<= 32
|
||||
shl $32,%rdi
|
||||
# x14 += x15
|
||||
add %rdi,%rbx
|
||||
# out = out_backup
|
||||
movq 136(%rsp),%rdi
|
||||
# m = m_backup
|
||||
movq 144(%rsp),%rsi
|
||||
# x0 ^= *(uint64 *) (m + 0)
|
||||
xorq 0(%rsi),%rdx
|
||||
# *(uint64 *) (out + 0) = x0
|
||||
movq %rdx,0(%rdi)
|
||||
# x2 ^= *(uint64 *) (m + 8)
|
||||
xorq 8(%rsi),%rcx
|
||||
# *(uint64 *) (out + 8) = x2
|
||||
movq %rcx,8(%rdi)
|
||||
# x4 ^= *(uint64 *) (m + 16)
|
||||
xorq 16(%rsi),%r9
|
||||
# *(uint64 *) (out + 16) = x4
|
||||
movq %r9,16(%rdi)
|
||||
# x6 ^= *(uint64 *) (m + 24)
|
||||
xorq 24(%rsi),%rax
|
||||
# *(uint64 *) (out + 24) = x6
|
||||
movq %rax,24(%rdi)
|
||||
# x8 ^= *(uint64 *) (m + 32)
|
||||
xorq 32(%rsi),%r11
|
||||
# *(uint64 *) (out + 32) = x8
|
||||
movq %r11,32(%rdi)
|
||||
# x10 ^= *(uint64 *) (m + 40)
|
||||
xorq 40(%rsi),%r8
|
||||
# *(uint64 *) (out + 40) = x10
|
||||
movq %r8,40(%rdi)
|
||||
# x12 ^= *(uint64 *) (m + 48)
|
||||
xorq 48(%rsi),%r14
|
||||
# *(uint64 *) (out + 48) = x12
|
||||
movq %r14,48(%rdi)
|
||||
# x14 ^= *(uint64 *) (m + 56)
|
||||
xorq 56(%rsi),%rbx
|
||||
# *(uint64 *) (out + 56) = x14
|
||||
movq %rbx,56(%rdi)
|
||||
# bytes = bytes_backup
|
||||
movq 152(%rsp),%rdx
|
||||
# in8 = j8
|
||||
movq 88(%rsp),%rcx
|
||||
# in8 += 1
|
||||
add $1,%rcx
|
||||
# j8 = in8
|
||||
movq %rcx,88(%rsp)
|
||||
# unsigned>? unsigned<? bytes - 64
|
||||
cmp $64,%rdx
|
||||
# comment:fp stack unchanged by jump
|
||||
# goto bytesatleast65 if unsigned>
|
||||
ja ._bytesatleast65
|
||||
# comment:fp stack unchanged by jump
|
||||
# goto bytesatleast64 if !unsigned<
|
||||
jae ._bytesatleast64
|
||||
# m = out
|
||||
mov %rdi,%rsi
|
||||
# out = ctarget
|
||||
movq 128(%rsp),%rdi
|
||||
# i = bytes
|
||||
mov %rdx,%rcx
|
||||
# while (i) { *out++ = *m++; --i }
|
||||
rep movsb
|
||||
# comment:fp stack unchanged by fallthrough
|
||||
# bytesatleast64:
|
||||
._bytesatleast64:
|
||||
# x = x_backup
|
||||
movq 120(%rsp),%rdi
|
||||
# in8 = j8
|
||||
movq 88(%rsp),%rsi
|
||||
# *(uint64 *) (x + 32) = in8
|
||||
movq %rsi,32(%rdi)
|
||||
# r11 = r11_stack
|
||||
movq 0(%rsp),%r11
|
||||
# r12 = r12_stack
|
||||
movq 8(%rsp),%r12
|
||||
# r13 = r13_stack
|
||||
movq 16(%rsp),%r13
|
||||
# r14 = r14_stack
|
||||
movq 24(%rsp),%r14
|
||||
# r15 = r15_stack
|
||||
movq 32(%rsp),%r15
|
||||
# rbx = rbx_stack
|
||||
movq 40(%rsp),%rbx
|
||||
# rbp = rbp_stack
|
||||
movq 48(%rsp),%rbp
|
||||
# comment:fp stack unchanged by fallthrough
|
||||
# done:
|
||||
._done:
|
||||
# leave
|
||||
add %r11,%rsp
|
||||
mov %rdi,%rax
|
||||
mov %rsi,%rdx
|
||||
ret
|
||||
# bytesatleast65:
|
||||
._bytesatleast65:
|
||||
# bytes -= 64
|
||||
sub $64,%rdx
|
||||
# out += 64
|
||||
add $64,%rdi
|
||||
# m += 64
|
||||
add $64,%rsi
|
||||
# comment:fp stack unchanged by jump
|
||||
# goto bytesatleast1
|
||||
jmp ._bytesatleast1
|
||||
ENDPROC(salsa20_encrypt_bytes)
|
||||
|
|
@ -1,91 +0,0 @@
|
|||
/*
|
||||
* Glue code for optimized assembly version of Salsa20.
|
||||
*
|
||||
* Copyright (c) 2007 Tan Swee Heng <thesweeheng@gmail.com>
|
||||
*
|
||||
* The assembly codes are public domain assembly codes written by Daniel. J.
|
||||
* Bernstein <djb@cr.yp.to>. The codes are modified to include indentation
|
||||
* and to remove extraneous comments and functions that are not needed.
|
||||
* - i586 version, renamed as salsa20-i586-asm_32.S
|
||||
* available from <http://cr.yp.to/snuffle/salsa20/x86-pm/salsa20.s>
|
||||
* - x86-64 version, renamed as salsa20-x86_64-asm_64.S
|
||||
* available from <http://cr.yp.to/snuffle/salsa20/amd64-3/salsa20.s>
|
||||
*
|
||||
* Also modified to set up the initial state using the generic C code rather
|
||||
* than in assembly.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the Free
|
||||
* Software Foundation; either version 2 of the License, or (at your option)
|
||||
* any later version.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <asm/unaligned.h>
|
||||
#include <crypto/internal/skcipher.h>
|
||||
#include <crypto/salsa20.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
asmlinkage void salsa20_encrypt_bytes(u32 state[16], const u8 *src, u8 *dst,
|
||||
u32 bytes);
|
||||
|
||||
static int salsa20_asm_crypt(struct skcipher_request *req)
|
||||
{
|
||||
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||||
const struct salsa20_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||||
struct skcipher_walk walk;
|
||||
u32 state[16];
|
||||
int err;
|
||||
|
||||
err = skcipher_walk_virt(&walk, req, true);
|
||||
|
||||
crypto_salsa20_init(state, ctx, walk.iv);
|
||||
|
||||
while (walk.nbytes > 0) {
|
||||
unsigned int nbytes = walk.nbytes;
|
||||
|
||||
if (nbytes < walk.total)
|
||||
nbytes = round_down(nbytes, walk.stride);
|
||||
|
||||
salsa20_encrypt_bytes(state, walk.src.virt.addr,
|
||||
walk.dst.virt.addr, nbytes);
|
||||
err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct skcipher_alg alg = {
|
||||
.base.cra_name = "salsa20",
|
||||
.base.cra_driver_name = "salsa20-asm",
|
||||
.base.cra_priority = 200,
|
||||
.base.cra_blocksize = 1,
|
||||
.base.cra_ctxsize = sizeof(struct salsa20_ctx),
|
||||
.base.cra_module = THIS_MODULE,
|
||||
|
||||
.min_keysize = SALSA20_MIN_KEY_SIZE,
|
||||
.max_keysize = SALSA20_MAX_KEY_SIZE,
|
||||
.ivsize = SALSA20_IV_SIZE,
|
||||
.chunksize = SALSA20_BLOCK_SIZE,
|
||||
.setkey = crypto_salsa20_setkey,
|
||||
.encrypt = salsa20_asm_crypt,
|
||||
.decrypt = salsa20_asm_crypt,
|
||||
};
|
||||
|
||||
static int __init init(void)
|
||||
{
|
||||
return crypto_register_skcipher(&alg);
|
||||
}
|
||||
|
||||
static void __exit fini(void)
|
||||
{
|
||||
crypto_unregister_skcipher(&alg);
|
||||
}
|
||||
|
||||
module_init(init);
|
||||
module_exit(fini);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION ("Salsa20 stream cipher algorithm (optimized assembly version)");
|
||||
MODULE_ALIAS_CRYPTO("salsa20");
|
||||
MODULE_ALIAS_CRYPTO("salsa20-asm");
|
||||
|
|
@ -1436,34 +1436,6 @@ config CRYPTO_SALSA20
|
|||
The Salsa20 stream cipher algorithm is designed by Daniel J.
|
||||
Bernstein <djb@cr.yp.to>. See <http://cr.yp.to/snuffle.html>
|
||||
|
||||
config CRYPTO_SALSA20_586
|
||||
tristate "Salsa20 stream cipher algorithm (i586)"
|
||||
depends on (X86 || UML_X86) && !64BIT
|
||||
select CRYPTO_BLKCIPHER
|
||||
select CRYPTO_SALSA20
|
||||
help
|
||||
Salsa20 stream cipher algorithm.
|
||||
|
||||
Salsa20 is a stream cipher submitted to eSTREAM, the ECRYPT
|
||||
Stream Cipher Project. See <http://www.ecrypt.eu.org/stream/>
|
||||
|
||||
The Salsa20 stream cipher algorithm is designed by Daniel J.
|
||||
Bernstein <djb@cr.yp.to>. See <http://cr.yp.to/snuffle.html>
|
||||
|
||||
config CRYPTO_SALSA20_X86_64
|
||||
tristate "Salsa20 stream cipher algorithm (x86_64)"
|
||||
depends on (X86 || UML_X86) && 64BIT
|
||||
select CRYPTO_BLKCIPHER
|
||||
select CRYPTO_SALSA20
|
||||
help
|
||||
Salsa20 stream cipher algorithm.
|
||||
|
||||
Salsa20 is a stream cipher submitted to eSTREAM, the ECRYPT
|
||||
Stream Cipher Project. See <http://www.ecrypt.eu.org/stream/>
|
||||
|
||||
The Salsa20 stream cipher algorithm is designed by Daniel J.
|
||||
Bernstein <djb@cr.yp.to>. See <http://cr.yp.to/snuffle.html>
|
||||
|
||||
config CRYPTO_CHACHA20
|
||||
tristate "ChaCha20 cipher algorithm"
|
||||
select CRYPTO_BLKCIPHER
|
||||
|
|
|
|||
Loading…
Reference in a new issue