| OLD | NEW |
|---|
| (Empty) |
| 1 #!/usr/bin/env perl | |
| 2 # | |
| 3 # ==================================================================== | |
| 4 # Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL | |
| 5 # project. Rights for redistribution and usage in source and binary | |
| 6 # forms are granted according to the OpenSSL license. | |
| 7 # ==================================================================== | |
| 8 # | |
| 9 # sha256/512_block procedure for x86_64. | |
| 10 # | |
| 11 # 40% improvement over compiler-generated code on Opteron. On EM64T | |
| 12 # sha256 was observed to run >80% faster and sha512 - >40%. No magical | |
| 13 # tricks, just straight implementation... I really wonder why gcc | |
| 14 # [being armed with inline assembler] fails to generate as fast code. | |
| 15 # The only thing which is cool about this module is that it's very | |
| 16 # same instruction sequence used for both SHA-256 and SHA-512. In | |
| 17 # former case the instructions operate on 32-bit operands, while in | |
| 18 # latter - on 64-bit ones. All I had to do is to get one flavor right, | |
| 19 # the other one passed the test right away:-) | |
| 20 # | |
| 21 # sha256_block runs in ~1005 cycles on Opteron, which gives you | |
| 22 # asymptotic performance of 64*1000/1005=63.7MBps times CPU clock | |
| 23 # frequency in GHz. sha512_block runs in ~1275 cycles, which results | |
| 24 # in 128*1000/1275=100MBps per GHz. Is there room for improvement? | |
| 25 # Well, if you compare it to IA-64 implementation, which maintains | |
| 26 # X[16] in register bank[!], tends to 4 instructions per CPU clock | |
| 27 # cycle and runs in 1003 cycles, 1275 is very good result for 3-way | |
| 28 # issue Opteron pipeline and X[16] maintained in memory. So that *if* | |
| 29 # there is a way to improve it, *then* the only way would be to try to | |
| 30 # offload X[16] updates to SSE unit, but that would require "deeper" | |
| 31 # loop unroll, which in turn would naturally cause size blow-up, not | |
| 32 # to mention increased complexity! And once again, only *if* it's | |
| 33 # actually possible to noticeably improve overall ILP, instruction | |
| 34 # level parallelism, on a given CPU implementation in this case. | |
| 35 # | |
| 36 # Special note on Intel EM64T. While Opteron CPU exhibits perfect | |
| 37 # perfromance ratio of 1.5 between 64- and 32-bit flavors [see above], | |
| 38 # [currently available] EM64T CPUs apparently are far from it. On the | |
| 39 # contrary, 64-bit version, sha512_block, is ~30% *slower* than 32-bit | |
| 40 # sha256_block:-( This is presumably because 64-bit shifts/rotates | |
| 41 # apparently are not atomic instructions, but implemented in microcode. | |
| 42 | |
| 43 $flavour = shift; | |
| 44 $output = shift; | |
| 45 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; } | |
| 46 | |
| 47 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/); | |
| 48 | |
| 49 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; | |
| 50 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or | |
| 51 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or | |
| 52 die "can't locate x86_64-xlate.pl"; | |
| 53 | |
| 54 open OUT,"| \"$^X\" $xlate $flavour $output"; | |
| 55 *STDOUT=*OUT; | |
| 56 | |
| 57 if ($output =~ /512/) { | |
| 58 $func="sha512_block_data_order"; | |
| 59 $TABLE="K512"; | |
| 60 $SZ=8; | |
| 61 @ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%rax","%rbx","%rcx","%rdx", | |
| 62 "%r8", "%r9", "%r10","%r11"); | |
| 63 ($T1,$a0,$a1,$a2)=("%r12","%r13","%r14","%r15"); | |
| 64 @Sigma0=(28,34,39); | |
| 65 @Sigma1=(14,18,41); | |
| 66 @sigma0=(1, 8, 7); | |
| 67 @sigma1=(19,61, 6); | |
| 68 $rounds=80; | |
| 69 } else { | |
| 70 $func="sha256_block_data_order"; | |
| 71 $TABLE="K256"; | |
| 72 $SZ=4; | |
| 73 @ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%eax","%ebx","%ecx","%edx", | |
| 74 "%r8d","%r9d","%r10d","%r11d"); | |
| 75 ($T1,$a0,$a1,$a2)=("%r12d","%r13d","%r14d","%r15d"); | |
| 76 @Sigma0=( 2,13,22); | |
| 77 @Sigma1=( 6,11,25); | |
| 78 @sigma0=( 7,18, 3); | |
| 79 @sigma1=(17,19,10); | |
| 80 $rounds=64; | |
| 81 } | |
| 82 | |
| 83 $ctx="%rdi"; # 1st arg | |
| 84 $round="%rdi"; # zaps $ctx | |
| 85 $inp="%rsi"; # 2nd arg | |
| 86 $Tbl="%rbp"; | |
| 87 | |
| 88 $_ctx="16*$SZ+0*8(%rsp)"; | |
| 89 $_inp="16*$SZ+1*8(%rsp)"; | |
| 90 $_end="16*$SZ+2*8(%rsp)"; | |
| 91 $_rsp="16*$SZ+3*8(%rsp)"; | |
| 92 $framesz="16*$SZ+4*8"; | |
| 93 | |
| 94 | |
| 95 sub ROUND_00_15() | |
| 96 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_; | |
| 97 | |
| 98 $code.=<<___; | |
| 99 ror \$`$Sigma1[2]-$Sigma1[1]`,$a0 | |
| 100 mov $f,$a2 | |
| 101 mov $T1,`$SZ*($i&0xf)`(%rsp) | |
| 102 | |
| 103 ror \$`$Sigma0[2]-$Sigma0[1]`,$a1 | |
| 104 xor $e,$a0 | |
| 105 xor $g,$a2 # f^g | |
| 106 | |
| 107 ror \$`$Sigma1[1]-$Sigma1[0]`,$a0 | |
| 108 add $h,$T1 # T1+=h | |
| 109 xor $a,$a1 | |
| 110 | |
| 111 add ($Tbl,$round,$SZ),$T1 # T1+=K[round] | |
| 112 and $e,$a2 # (f^g)&e | |
| 113 mov $b,$h | |
| 114 | |
| 115 ror \$`$Sigma0[1]-$Sigma0[0]`,$a1 | |
| 116 xor $e,$a0 | |
| 117 xor $g,$a2 # Ch(e,f,g)=((f^g)&e)^g | |
| 118 | |
| 119 xor $c,$h # b^c | |
| 120 xor $a,$a1 | |
| 121 add $a2,$T1 # T1+=Ch(e,f,g) | |
| 122 mov $b,$a2 | |
| 123 | |
| 124 ror \$$Sigma1[0],$a0 # Sigma1(e) | |
| 125 and $a,$h # h=(b^c)&a | |
| 126 and $c,$a2 # b&c | |
| 127 | |
| 128 ror \$$Sigma0[0],$a1 # Sigma0(a) | |
| 129 add $a0,$T1 # T1+=Sigma1(e) | |
| 130 add $a2,$h # h+=b&c (completes +=Maj(a,b,c) | |
| 131 | |
| 132 add $T1,$d # d+=T1 | |
| 133 add $T1,$h # h+=T1 | |
| 134 lea 1($round),$round # round++ | |
| 135 add $a1,$h # h+=Sigma0(a) | |
| 136 | |
| 137 ___ | |
| 138 } | |
| 139 | |
| 140 sub ROUND_16_XX() | |
| 141 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_; | |
| 142 | |
| 143 $code.=<<___; | |
| 144 mov `$SZ*(($i+1)&0xf)`(%rsp),$a0 | |
| 145 mov `$SZ*(($i+14)&0xf)`(%rsp),$a1 | |
| 146 mov $a0,$T1 | |
| 147 mov $a1,$a2 | |
| 148 | |
| 149 ror \$`$sigma0[1]-$sigma0[0]`,$T1 | |
| 150 xor $a0,$T1 | |
| 151 shr \$$sigma0[2],$a0 | |
| 152 | |
| 153 ror \$$sigma0[0],$T1 | |
| 154 xor $T1,$a0 # sigma0(X[(i+1)&0xf]) | |
| 155 mov `$SZ*(($i+9)&0xf)`(%rsp),$T1 | |
| 156 | |
| 157 ror \$`$sigma1[1]-$sigma1[0]`,$a2 | |
| 158 xor $a1,$a2 | |
| 159 shr \$$sigma1[2],$a1 | |
| 160 | |
| 161 ror \$$sigma1[0],$a2 | |
| 162 add $a0,$T1 | |
| 163 xor $a2,$a1 # sigma1(X[(i+14)&0xf]) | |
| 164 | |
| 165 add `$SZ*($i&0xf)`(%rsp),$T1 | |
| 166 mov $e,$a0 | |
| 167 add $a1,$T1 | |
| 168 mov $a,$a1 | |
| 169 ___ | |
| 170 &ROUND_00_15(@_); | |
| 171 } | |
| 172 | |
| 173 $code=<<___; | |
| 174 .text | |
| 175 | |
| 176 .globl $func | |
| 177 .type $func,\@function,4 | |
| 178 .align 16 | |
| 179 $func: | |
| 180 push %rbx | |
| 181 push %rbp | |
| 182 push %r12 | |
| 183 push %r13 | |
| 184 push %r14 | |
| 185 push %r15 | |
| 186 mov %rsp,%r11 # copy %rsp | |
| 187 shl \$4,%rdx # num*16 | |
| 188 sub \$$framesz,%rsp | |
| 189 lea ($inp,%rdx,$SZ),%rdx # inp+num*16*$SZ | |
| 190 and \$-64,%rsp # align stack frame | |
| 191 mov $ctx,$_ctx # save ctx, 1st arg | |
| 192 mov $inp,$_inp # save inp, 2nd arh | |
| 193 mov %rdx,$_end # save end pointer, "3rd" arg | |
| 194 mov %r11,$_rsp # save copy of %rsp | |
| 195 .Lprologue: | |
| 196 | |
| 197 lea $TABLE(%rip),$Tbl | |
| 198 | |
| 199 mov $SZ*0($ctx),$A | |
| 200 mov $SZ*1($ctx),$B | |
| 201 mov $SZ*2($ctx),$C | |
| 202 mov $SZ*3($ctx),$D | |
| 203 mov $SZ*4($ctx),$E | |
| 204 mov $SZ*5($ctx),$F | |
| 205 mov $SZ*6($ctx),$G | |
| 206 mov $SZ*7($ctx),$H | |
| 207 jmp .Lloop | |
| 208 | |
| 209 .align 16 | |
| 210 .Lloop: | |
| 211 xor $round,$round | |
| 212 ___ | |
| 213 for($i=0;$i<16;$i++) { | |
| 214 $code.=" mov $SZ*$i($inp),$T1\n"; | |
| 215 $code.=" mov @ROT[4],$a0\n"; | |
| 216 $code.=" mov @ROT[0],$a1\n"; | |
| 217 $code.=" bswap $T1\n"; | |
| 218 &ROUND_00_15($i,@ROT); | |
| 219 unshift(@ROT,pop(@ROT)); | |
| 220 } | |
| 221 $code.=<<___; | |
| 222 jmp .Lrounds_16_xx | |
| 223 .align 16 | |
| 224 .Lrounds_16_xx: | |
| 225 ___ | |
| 226 for(;$i<32;$i++) { | |
| 227 &ROUND_16_XX($i,@ROT); | |
| 228 unshift(@ROT,pop(@ROT)); | |
| 229 } | |
| 230 | |
| 231 $code.=<<___; | |
| 232 cmp \$$rounds,$round | |
| 233 jb .Lrounds_16_xx | |
| 234 | |
| 235 mov $_ctx,$ctx | |
| 236 lea 16*$SZ($inp),$inp | |
| 237 | |
| 238 add $SZ*0($ctx),$A | |
| 239 add $SZ*1($ctx),$B | |
| 240 add $SZ*2($ctx),$C | |
| 241 add $SZ*3($ctx),$D | |
| 242 add $SZ*4($ctx),$E | |
| 243 add $SZ*5($ctx),$F | |
| 244 add $SZ*6($ctx),$G | |
| 245 add $SZ*7($ctx),$H | |
| 246 | |
| 247 cmp $_end,$inp | |
| 248 | |
| 249 mov $A,$SZ*0($ctx) | |
| 250 mov $B,$SZ*1($ctx) | |
| 251 mov $C,$SZ*2($ctx) | |
| 252 mov $D,$SZ*3($ctx) | |
| 253 mov $E,$SZ*4($ctx) | |
| 254 mov $F,$SZ*5($ctx) | |
| 255 mov $G,$SZ*6($ctx) | |
| 256 mov $H,$SZ*7($ctx) | |
| 257 jb .Lloop | |
| 258 | |
| 259 mov $_rsp,%rsi | |
| 260 mov (%rsi),%r15 | |
| 261 mov 8(%rsi),%r14 | |
| 262 mov 16(%rsi),%r13 | |
| 263 mov 24(%rsi),%r12 | |
| 264 mov 32(%rsi),%rbp | |
| 265 mov 40(%rsi),%rbx | |
| 266 lea 48(%rsi),%rsp | |
| 267 .Lepilogue: | |
| 268 ret | |
| 269 .size $func,.-$func | |
| 270 ___ | |
| 271 | |
| 272 if ($SZ==4) { | |
| 273 $code.=<<___; | |
| 274 .align 64 | |
| 275 .type $TABLE,\@object | |
| 276 $TABLE: | |
| 277 .long 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5 | |
| 278 .long 0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5 | |
| 279 .long 0xd807aa98,0x12835b01,0x243185be,0x550c7dc3 | |
| 280 .long 0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174 | |
| 281 .long 0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc | |
| 282 .long 0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da | |
| 283 .long 0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7 | |
| 284 .long 0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967 | |
| 285 .long 0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13 | |
| 286 .long 0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85 | |
| 287 .long 0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3 | |
| 288 .long 0xd192e819,0xd6990624,0xf40e3585,0x106aa070 | |
| 289 .long 0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5 | |
| 290 .long 0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3 | |
| 291 .long 0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208 | |
| 292 .long 0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2 | |
| 293 ___ | |
| 294 } else { | |
| 295 $code.=<<___; | |
| 296 .align 64 | |
| 297 .type $TABLE,\@object | |
| 298 $TABLE: | |
| 299 .quad 0x428a2f98d728ae22,0x7137449123ef65cd | |
| 300 .quad 0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc | |
| 301 .quad 0x3956c25bf348b538,0x59f111f1b605d019 | |
| 302 .quad 0x923f82a4af194f9b,0xab1c5ed5da6d8118 | |
| 303 .quad 0xd807aa98a3030242,0x12835b0145706fbe | |
| 304 .quad 0x243185be4ee4b28c,0x550c7dc3d5ffb4e2 | |
| 305 .quad 0x72be5d74f27b896f,0x80deb1fe3b1696b1 | |
| 306 .quad 0x9bdc06a725c71235,0xc19bf174cf692694 | |
| 307 .quad 0xe49b69c19ef14ad2,0xefbe4786384f25e3 | |
| 308 .quad 0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65 | |
| 309 .quad 0x2de92c6f592b0275,0x4a7484aa6ea6e483 | |
| 310 .quad 0x5cb0a9dcbd41fbd4,0x76f988da831153b5 | |
| 311 .quad 0x983e5152ee66dfab,0xa831c66d2db43210 | |
| 312 .quad 0xb00327c898fb213f,0xbf597fc7beef0ee4 | |
| 313 .quad 0xc6e00bf33da88fc2,0xd5a79147930aa725 | |
| 314 .quad 0x06ca6351e003826f,0x142929670a0e6e70 | |
| 315 .quad 0x27b70a8546d22ffc,0x2e1b21385c26c926 | |
| 316 .quad 0x4d2c6dfc5ac42aed,0x53380d139d95b3df | |
| 317 .quad 0x650a73548baf63de,0x766a0abb3c77b2a8 | |
| 318 .quad 0x81c2c92e47edaee6,0x92722c851482353b | |
| 319 .quad 0xa2bfe8a14cf10364,0xa81a664bbc423001 | |
| 320 .quad 0xc24b8b70d0f89791,0xc76c51a30654be30 | |
| 321 .quad 0xd192e819d6ef5218,0xd69906245565a910 | |
| 322 .quad 0xf40e35855771202a,0x106aa07032bbd1b8 | |
| 323 .quad 0x19a4c116b8d2d0c8,0x1e376c085141ab53 | |
| 324 .quad 0x2748774cdf8eeb99,0x34b0bcb5e19b48a8 | |
| 325 .quad 0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb | |
| 326 .quad 0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3 | |
| 327 .quad 0x748f82ee5defb2fc,0x78a5636f43172f60 | |
| 328 .quad 0x84c87814a1f0ab72,0x8cc702081a6439ec | |
| 329 .quad 0x90befffa23631e28,0xa4506cebde82bde9 | |
| 330 .quad 0xbef9a3f7b2c67915,0xc67178f2e372532b | |
| 331 .quad 0xca273eceea26619c,0xd186b8c721c0c207 | |
| 332 .quad 0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178 | |
| 333 .quad 0x06f067aa72176fba,0x0a637dc5a2c898a6 | |
| 334 .quad 0x113f9804bef90dae,0x1b710b35131c471b | |
| 335 .quad 0x28db77f523047d84,0x32caab7b40c72493 | |
| 336 .quad 0x3c9ebe0a15c9bebc,0x431d67c49c100d4c | |
| 337 .quad 0x4cc5d4becb3e42b6,0x597f299cfc657e2a | |
| 338 .quad 0x5fcb6fab3ad6faec,0x6c44198c4a475817 | |
| 339 ___ | |
| 340 } | |
| 341 | |
| 342 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame, | |
| 343 # CONTEXT *context,DISPATCHER_CONTEXT *disp) | |
| 344 if ($win64) { | |
| 345 $rec="%rcx"; | |
| 346 $frame="%rdx"; | |
| 347 $context="%r8"; | |
| 348 $disp="%r9"; | |
| 349 | |
| 350 $code.=<<___; | |
| 351 .extern __imp_RtlVirtualUnwind | |
| 352 .type se_handler,\@abi-omnipotent | |
| 353 .align 16 | |
| 354 se_handler: | |
| 355 push %rsi | |
| 356 push %rdi | |
| 357 push %rbx | |
| 358 push %rbp | |
| 359 push %r12 | |
| 360 push %r13 | |
| 361 push %r14 | |
| 362 push %r15 | |
| 363 pushfq | |
| 364 sub \$64,%rsp | |
| 365 | |
| 366 mov 120($context),%rax # pull context->Rax | |
| 367 mov 248($context),%rbx # pull context->Rip | |
| 368 | |
| 369 lea .Lprologue(%rip),%r10 | |
| 370 cmp %r10,%rbx # context->Rip<.Lprologue | |
| 371 jb .Lin_prologue | |
| 372 | |
| 373 mov 152($context),%rax # pull context->Rsp | |
| 374 | |
| 375 lea .Lepilogue(%rip),%r10 | |
| 376 cmp %r10,%rbx # context->Rip>=.Lepilogue | |
| 377 jae .Lin_prologue | |
| 378 | |
| 379 mov 16*$SZ+3*8(%rax),%rax # pull $_rsp | |
| 380 lea 48(%rax),%rax | |
| 381 | |
| 382 mov -8(%rax),%rbx | |
| 383 mov -16(%rax),%rbp | |
| 384 mov -24(%rax),%r12 | |
| 385 mov -32(%rax),%r13 | |
| 386 mov -40(%rax),%r14 | |
| 387 mov -48(%rax),%r15 | |
| 388 mov %rbx,144($context) # restore context->Rbx | |
| 389 mov %rbp,160($context) # restore context->Rbp | |
| 390 mov %r12,216($context) # restore context->R12 | |
| 391 mov %r13,224($context) # restore context->R13 | |
| 392 mov %r14,232($context) # restore context->R14 | |
| 393 mov %r15,240($context) # restore context->R15 | |
| 394 | |
| 395 .Lin_prologue: | |
| 396 mov 8(%rax),%rdi | |
| 397 mov 16(%rax),%rsi | |
| 398 mov %rax,152($context) # restore context->Rsp | |
| 399 mov %rsi,168($context) # restore context->Rsi | |
| 400 mov %rdi,176($context) # restore context->Rdi | |
| 401 | |
| 402 mov 40($disp),%rdi # disp->ContextRecord | |
| 403 mov $context,%rsi # context | |
| 404 mov \$154,%ecx # sizeof(CONTEXT) | |
| 405 .long 0xa548f3fc # cld; rep movsq | |
| 406 | |
| 407 mov $disp,%rsi | |
| 408 xor %rcx,%rcx # arg1, UNW_FLAG_NHANDLER | |
| 409 mov 8(%rsi),%rdx # arg2, disp->ImageBase | |
| 410 mov 0(%rsi),%r8 # arg3, disp->ControlPc | |
| 411 mov 16(%rsi),%r9 # arg4, disp->FunctionEntry | |
| 412 mov 40(%rsi),%r10 # disp->ContextRecord | |
| 413 lea 56(%rsi),%r11 # &disp->HandlerData | |
| 414 lea 24(%rsi),%r12 # &disp->EstablisherFrame | |
| 415 mov %r10,32(%rsp) # arg5 | |
| 416 mov %r11,40(%rsp) # arg6 | |
| 417 mov %r12,48(%rsp) # arg7 | |
| 418 mov %rcx,56(%rsp) # arg8, (NULL) | |
| 419 call *__imp_RtlVirtualUnwind(%rip) | |
| 420 | |
| 421 mov \$1,%eax # ExceptionContinueSearch | |
| 422 add \$64,%rsp | |
| 423 popfq | |
| 424 pop %r15 | |
| 425 pop %r14 | |
| 426 pop %r13 | |
| 427 pop %r12 | |
| 428 pop %rbp | |
| 429 pop %rbx | |
| 430 pop %rdi | |
| 431 pop %rsi | |
| 432 ret | |
| 433 .size se_handler,.-se_handler | |
| 434 | |
| 435 .section .pdata | |
| 436 .align 4 | |
| 437 .rva .LSEH_begin_$func | |
| 438 .rva .LSEH_end_$func | |
| 439 .rva .LSEH_info_$func | |
| 440 | |
| 441 .section .xdata | |
| 442 .align 8 | |
| 443 .LSEH_info_$func: | |
| 444 .byte 9,0,0,0 | |
| 445 .rva se_handler | |
| 446 ___ | |
| 447 } | |
| 448 | |
| 449 $code =~ s/\`([^\`]*)\`/eval $1/gem; | |
| 450 print $code; | |
| 451 close STDOUT; | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master