ceph/src/crypto/isa-l/isa-l_crypto/sha512_mb/sha512_ctx_sse.c

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  29
  30 #include "sha512_mb.h"
  31 #include "memcpy_inline.h"
  32
  33 #ifdef _MSC_VER
  34 # include <intrin.h>
  35 # define inline __inline
  36 #endif
  37
  38 static inline void hash_init_digest(SHA512_WORD_T * digest);
  39 static inline uint32_t hash_pad(uint8_t padblock[SHA512_BLOCK_SIZE * 2], uint32_t total_len);
  40 static SHA512_HASH_CTX *sha512_ctx_mgr_resubmit(SHA512_HASH_CTX_MGR * mgr,
  41                                                 SHA512_HASH_CTX * ctx);
  42
  43 void sha512_ctx_mgr_init_sse(SHA512_HASH_CTX_MGR * mgr)
  44 {
  45         sha512_mb_mgr_init_sse(&mgr->mgr);
  46 }
  47
  48 SHA512_HASH_CTX *sha512_ctx_mgr_submit_sse(SHA512_HASH_CTX_MGR * mgr, SHA512_HASH_CTX * ctx,
  49                                            const void *buffer, uint32_t len,
  50                                            HASH_CTX_FLAG flags)
  51 {
  52         if (flags & (~HASH_ENTIRE)) {
  53                 // User should not pass anything other than FIRST, UPDATE, or LAST
  54                 ctx->error = HASH_CTX_ERROR_INVALID_FLAGS;
  55                 return ctx;
  56         }
  57
  58         if (ctx->status & HASH_CTX_STS_PROCESSING) {
  59                 // Cannot submit to a currently processing job.
  60                 ctx->error = HASH_CTX_ERROR_ALREADY_PROCESSING;
  61                 return ctx;
  62         }
  63
  64         if ((ctx->status & HASH_CTX_STS_COMPLETE) && !(flags & HASH_FIRST)) {
  65                 // Cannot update a finished job.
  66                 ctx->error = HASH_CTX_ERROR_ALREADY_COMPLETED;
  67                 return ctx;
  68         }
  69
  70         if (flags & HASH_FIRST) {
  71                 // Init digest
  72                 hash_init_digest(ctx->job.result_digest);
  73
  74                 // Reset byte counter
  75                 ctx->total_length = 0;
  76
  77                 // Clear extra blocks
  78                 ctx->partial_block_buffer_length = 0;
  79         }
  80         // If we made it here, there were no errors during this call to submit
  81         ctx->error = HASH_CTX_ERROR_NONE;
  82
  83         // Store buffer ptr info from user
  84         ctx->incoming_buffer = buffer;
  85         ctx->incoming_buffer_length = len;
  86
  87         // Store the user's request flags and mark this ctx as currently being processed.
  88         ctx->status = (flags & HASH_LAST) ?
  89             (HASH_CTX_STS) (HASH_CTX_STS_PROCESSING | HASH_CTX_STS_LAST) :
  90             HASH_CTX_STS_PROCESSING;
  91
  92         // Advance byte counter
  93         ctx->total_length += len;
  94
  95         // If there is anything currently buffered in the extra blocks, append to it until it contains a whole block.
  96         // Or if the user's buffer contains less than a whole block, append as much as possible to the extra block.
  97         if ((ctx->partial_block_buffer_length) | (len < SHA512_BLOCK_SIZE)) {
  98                 // Compute how many bytes to copy from user buffer into extra block
  99                 uint32_t copy_len = SHA512_BLOCK_SIZE - ctx->partial_block_buffer_length;
 100                 if (len < copy_len)
 101                         copy_len = len;
 102
 103                 if (copy_len) {
 104                         // Copy and update relevant pointers and counters
 105                         memcpy_varlen(&ctx->partial_block_buffer
 106                                       [ctx->partial_block_buffer_length], buffer, copy_len);
 107
 108                         ctx->partial_block_buffer_length += copy_len;
 109                         ctx->incoming_buffer = (const void *)((const char *)buffer + copy_len);
 110                         ctx->incoming_buffer_length = len - copy_len;
 111                 }
 112                 // The extra block should never contain more than 1 block here
 113                 assert(ctx->partial_block_buffer_length <= SHA512_BLOCK_SIZE);
 114
 115                 // If the extra block buffer contains exactly 1 block, it can be hashed.
 116                 if (ctx->partial_block_buffer_length >= SHA512_BLOCK_SIZE) {
 117                         ctx->partial_block_buffer_length = 0;
 118
 119                         ctx->job.buffer = ctx->partial_block_buffer;
 120                         ctx->job.len = 1;
 121
 122                         ctx =
 123                             (SHA512_HASH_CTX *) sha512_mb_mgr_submit_sse(&mgr->mgr, &ctx->job);
 124                 }
 125         }
 126
 127         return sha512_ctx_mgr_resubmit(mgr, ctx);
 128 }
 129
 130 SHA512_HASH_CTX *sha512_ctx_mgr_flush_sse(SHA512_HASH_CTX_MGR * mgr)
 131 {
 132         SHA512_HASH_CTX *ctx;
 133
 134         while (1) {
 135                 ctx = (SHA512_HASH_CTX *) sha512_mb_mgr_flush_sse(&mgr->mgr);
 136
 137                 // If flush returned 0, there are no more jobs in flight.
 138                 if (!ctx)
 139                         return NULL;
 140
 141                 // If flush returned a job, verify that it is safe to return to the user.
 142                 // If it is not ready, resubmit the job to finish processing.
 143                 ctx = sha512_ctx_mgr_resubmit(mgr, ctx);
 144
 145                 // If sha512_ctx_mgr_resubmit returned a job, it is ready to be returned.
 146                 if (ctx)
 147                         return ctx;
 148
 149                 // Otherwise, all jobs currently being managed by the SHA512_HASH_CTX_MGR still need processing. Loop.
 150         }
 151 }
 152
 153 static SHA512_HASH_CTX *sha512_ctx_mgr_resubmit(SHA512_HASH_CTX_MGR * mgr,
 154                                                 SHA512_HASH_CTX * ctx)
 155 {
 156         while (ctx) {
 157                 if (ctx->status & HASH_CTX_STS_COMPLETE) {
 158                         ctx->status = HASH_CTX_STS_COMPLETE;    // Clear PROCESSING bit
 159                         return ctx;
 160                 }
 161                 // If the extra blocks are empty, begin hashing what remains in the user's buffer.
 162                 if (ctx->partial_block_buffer_length == 0 && ctx->incoming_buffer_length) {
 163                         const void *buffer = ctx->incoming_buffer;
 164                         uint32_t len = ctx->incoming_buffer_length;
 165
 166                         // Only entire blocks can be hashed. Copy remainder to extra blocks buffer.
 167                         uint32_t copy_len = len & (SHA512_BLOCK_SIZE - 1);
 168
 169                         if (copy_len) {
 170                                 len -= copy_len;
 171                                 memcpy_varlen(ctx->partial_block_buffer,
 172                                               ((const char *)buffer + len), copy_len);
 173                                 ctx->partial_block_buffer_length = copy_len;
 174                         }
 175
 176                         ctx->incoming_buffer_length = 0;
 177
 178                         // len should be a multiple of the block size now
 179                         assert((len % SHA512_BLOCK_SIZE) == 0);
 180
 181                         // Set len to the number of blocks to be hashed in the user's buffer
 182                         len >>= SHA512_LOG2_BLOCK_SIZE;
 183
 184                         if (len) {
 185                                 ctx->job.buffer = (uint8_t *) buffer;
 186                                 ctx->job.len = len;
 187                                 ctx = (SHA512_HASH_CTX *) sha512_mb_mgr_submit_sse(&mgr->mgr,
 188                                                                                    &ctx->job);
 189                                 continue;
 190                         }
 191                 }
 192                 // If the extra blocks are not empty, then we are either on the last block(s)
 193                 // or we need more user input before continuing.
 194                 if (ctx->status & HASH_CTX_STS_LAST) {
 195                         uint8_t *buf = ctx->partial_block_buffer;
 196                         uint32_t n_extra_blocks = hash_pad(buf, ctx->total_length);
 197
 198                         ctx->status =
 199                             (HASH_CTX_STS) (HASH_CTX_STS_PROCESSING | HASH_CTX_STS_COMPLETE);
 200                         ctx->job.buffer = buf;
 201                         ctx->job.len = (uint32_t) n_extra_blocks;
 202                         ctx = (SHA512_HASH_CTX *) sha512_mb_mgr_submit_sse(&mgr->mgr,
 203                                                                            &ctx->job);
 204                         continue;
 205                 }
 206
 207                 if (ctx)
 208                         ctx->status = HASH_CTX_STS_IDLE;
 209                 return ctx;
 210         }
 211
 212         return NULL;
 213 }
 214
 215 static inline void hash_init_digest(SHA512_WORD_T * digest)
 216 {
 217         static const SHA512_WORD_T hash_initial_digest[SHA512_DIGEST_NWORDS] =
 218             { SHA512_INITIAL_DIGEST };
 219         memcpy_fixedlen(digest, hash_initial_digest, sizeof(hash_initial_digest));
 220 }
 221
 222 static inline uint32_t hash_pad(uint8_t padblock[SHA512_BLOCK_SIZE * 2], uint32_t total_len)
 223 {
 224         uint32_t i = total_len & (SHA512_BLOCK_SIZE - 1);
 225
 226         memclr_fixedlen(&padblock[i], SHA512_BLOCK_SIZE);
 227         padblock[i] = 0x80;
 228
 229         // Move i to the end of either 1st or 2nd extra block depending on length
 230         i += ((SHA512_BLOCK_SIZE - 1) & (0 - (total_len + SHA512_PADLENGTHFIELD_SIZE + 1))) +
 231             1 + SHA512_PADLENGTHFIELD_SIZE;
 232
 233 #if SHA512_PADLENGTHFIELD_SIZE == 16
 234         *((uint64_t *) & padblock[i - 16]) = 0;
 235 #endif
 236
 237         *((uint64_t *) & padblock[i - 8]) = _byteswap_uint64((uint64_t) total_len << 3);
 238
 239         return i >> SHA512_LOG2_BLOCK_SIZE;     // Number of extra blocks to hash
 240 }
 241
 242 struct slver {
 243         uint16_t snum;
 244         uint8_t ver;
 245         uint8_t core;
 246 };
 247 struct slver sha512_ctx_mgr_init_sse_slver_00020163;
 248 struct slver sha512_ctx_mgr_init_sse_slver = { 0x0163, 0x02, 0x00 };
 249
 250 struct slver sha512_ctx_mgr_submit_sse_slver_00020164;
 251 struct slver sha512_ctx_mgr_submit_sse_slver = { 0x0164, 0x02, 0x00 };
 252
 253 struct slver sha512_ctx_mgr_flush_sse_slver_00020165;
 254 struct slver sha512_ctx_mgr_flush_sse_slver = { 0x0165, 0x02, 0x00 };