248 lines
9.1 KiB
C
248 lines
9.1 KiB
C
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/***********************************************************************
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**
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** Debug output functions for Skein hashing.
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**
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** Source code author: Doug Whiting, 2008.
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**
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** This algorithm and source code is released to the public domain.
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**
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************************************************************************/
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#include <stdio.h>
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#ifdef SKEIN_DEBUG /* only instantiate this code if SKEIN_DEBUG is on */
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#include "skein.h"
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static const char INDENT[] = " "; /* how much to indent on new line */
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uint_t skein_DebugFlag = 0; /* off by default. Must be set externally */
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static void Show64_step(size_t cnt,const u64b_t *X,size_t step)
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{
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size_t i,j;
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for (i=j=0;i < cnt;i++,j+=step)
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{
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if (i % 4 == 0) printf(INDENT);
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printf(" %08X.%08X ",(uint_32t)(X[j] >> 32),(uint_32t)X[j]);
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if (i % 4 == 3 || i==cnt-1) printf("\n");
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fflush(stdout);
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}
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}
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#define Show64(cnt,X) Show64_step(cnt,X,1)
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static void Show64_flag(size_t cnt,const u64b_t *X)
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{
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size_t xptr = (size_t) X;
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size_t step = (xptr & 1) ? 2 : 1;
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if (step != 1)
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{
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X = (const u64b_t *) (xptr & ~1);
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}
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Show64_step(cnt,X,step);
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}
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static void Show08(size_t cnt,const u08b_t *b)
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{
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size_t i;
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for (i=0;i < cnt;i++)
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{
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if (i %16 == 0) printf(INDENT);
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else if (i % 4 == 0) printf(" ");
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printf(" %02X",b[i]);
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if (i %16 == 15 || i==cnt-1) printf("\n");
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fflush(stdout);
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}
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}
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static const char *AlgoHeader(uint_t bits)
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{
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if (skein_DebugFlag & SKEIN_DEBUG_THREEFISH)
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switch (bits)
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{
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case 256: return ":Threefish-256: ";
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case 512: return ":Threefish-512: ";
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case 1024: return ":Threefish-1024:";
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}
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else
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switch (bits)
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{
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case 256: return ":Skein-256: ";
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case 512: return ":Skein-512: ";
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case 1024: return ":Skein-1024:";
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}
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return NULL;
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}
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void Skein_Show_Final(uint_t bits,const Skein_Ctxt_Hdr_t *h,size_t cnt,const u08b_t *outPtr)
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{
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if (skein_DebugFlag & SKEIN_DEBUG_CONFIG || ((h->T[1] & SKEIN_T1_BLK_TYPE_MASK) != SKEIN_T1_BLK_TYPE_CFG))
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if (skein_DebugFlag & SKEIN_DEBUG_FINAL)
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{
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printf("\n%s Final output=\n",AlgoHeader(bits));
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Show08(cnt,outPtr);
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printf(" ++++++++++\n");
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fflush(stdout);
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}
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}
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/* show state after a round (or "pseudo-round") */
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void Skein_Show_Round(uint_t bits,const Skein_Ctxt_Hdr_t *h,size_t r,const u64b_t *X)
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{
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static uint_t injectNum=0; /* not multi-thread safe! */
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if (skein_DebugFlag & SKEIN_DEBUG_CONFIG || ((h->T[1] & SKEIN_T1_BLK_TYPE_MASK) != SKEIN_T1_BLK_TYPE_CFG))
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if (skein_DebugFlag)
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{
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if (r >= SKEIN_RND_SPECIAL)
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{ /* a key injection (or feedforward) point */
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injectNum = (r == SKEIN_RND_KEY_INITIAL) ? 0 : injectNum+1;
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if ( skein_DebugFlag & SKEIN_DEBUG_INJECT ||
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((skein_DebugFlag & SKEIN_DEBUG_FINAL) && r == SKEIN_RND_FEED_FWD))
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{
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printf("\n%s",AlgoHeader(bits));
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switch (r)
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{
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case SKEIN_RND_KEY_INITIAL:
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printf(" [state after initial key injection]");
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break;
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case SKEIN_RND_KEY_INJECT:
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printf(" [state after key injection #%02d]",injectNum);
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break;
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case SKEIN_RND_FEED_FWD:
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printf(" [state after plaintext feedforward]");
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injectNum = 0;
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break;
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}
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printf("=\n");
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Show64(bits/64,X);
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if (r== SKEIN_RND_FEED_FWD)
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printf(" ----------\n");
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}
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}
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else if (skein_DebugFlag & SKEIN_DEBUG_ROUNDS)
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{
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uint_t j;
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u64b_t p[SKEIN_MAX_STATE_WORDS];
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const u08b_t *perm;
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const static u08b_t PERM_256 [4][ 4] = { { 0,1,2,3 }, { 0,3,2,1 }, { 0,1,2,3 }, { 0,3,2,1 } };
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const static u08b_t PERM_512 [4][ 8] = { { 0,1,2,3,4,5,6,7 },
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{ 2,1,4,7,6,5,0,3 },
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{ 4,1,6,3,0,5,2,7 },
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{ 6,1,0,7,2,5,4,3 }
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};
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const static u08b_t PERM_1024[4][16] = { { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 },
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{ 0, 9, 2,13, 6,11, 4,15,10, 7,12, 3,14, 5, 8, 1 },
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{ 0, 7, 2, 5, 4, 3, 6, 1,12,15,14,13, 8,11,10, 9 },
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{ 0,15, 2,11, 6,13, 4, 9,14, 1, 8, 5,10, 3,12, 7 }
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};
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if ((skein_DebugFlag & SKEIN_DEBUG_PERMUTE) && (r & 3))
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{
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printf("\n%s [state after round %2d (permuted)]=\n",AlgoHeader(bits),(int)r);
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switch (bits)
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{
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case 256: perm = PERM_256 [r&3]; break;
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case 512: perm = PERM_512 [r&3]; break;
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default: perm = PERM_1024[r&3]; break;
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}
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for (j=0;j<bits/64;j++)
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p[j] = X[perm[j]];
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Show64(bits/64,p);
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}
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else
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{
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printf("\n%s [state after round %2d]=\n",AlgoHeader(bits),(int)r);
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Show64(bits/64,X);
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}
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}
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}
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}
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/* show state after a round (or "pseudo-round"), given a list of pointers */
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void Skein_Show_R_Ptr(uint_t bits,const Skein_Ctxt_Hdr_t *h,size_t r,const u64b_t *X_ptr[])
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{
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uint_t i;
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u64b_t X[SKEIN_MAX_STATE_WORDS];
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for (i=0;i<bits/64;i++) /* copy over the words */
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X[i] = X_ptr[i][0];
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Skein_Show_Round(bits,h,r,X);
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}
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/* show the state at the start of a block */
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void Skein_Show_Block(uint_t bits,const Skein_Ctxt_Hdr_t *h,const u64b_t *X,const u08b_t *blkPtr,
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const u64b_t *wPtr, const u64b_t *ksPtr, const u64b_t *tsPtr)
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{
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uint_t n;
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if (skein_DebugFlag & SKEIN_DEBUG_CONFIG || ((h->T[1] & SKEIN_T1_BLK_TYPE_MASK) != SKEIN_T1_BLK_TYPE_CFG))
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if (skein_DebugFlag)
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{
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if (skein_DebugFlag & SKEIN_DEBUG_HDR)
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{
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printf("\n%s Block: outBits=%4d. T0=%06X.",AlgoHeader(bits),(uint_t) h->hashBitLen,(uint_t)h->T[0]);
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printf(" Type=");
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n = (uint_t) ((h->T[1] & SKEIN_T1_BLK_TYPE_MASK) >> SKEIN_T1_POS_BLK_TYPE);
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switch (n)
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{
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case SKEIN_BLK_TYPE_KEY: printf("KEY. "); break;
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case SKEIN_BLK_TYPE_CFG: printf("CFG. "); break;
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case SKEIN_BLK_TYPE_PERS: printf("PERS."); break;
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case SKEIN_BLK_TYPE_PK : printf("PK. "); break;
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case SKEIN_BLK_TYPE_KDF: printf("KDF. "); break;
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case SKEIN_BLK_TYPE_MSG: printf("MSG. "); break;
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case SKEIN_BLK_TYPE_OUT: printf("OUT. "); break;
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default: printf("0x%02X.",n); break;
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}
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printf(" Flags=");
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printf((h->T[1] & SKEIN_T1_FLAG_FIRST) ? " First":" ");
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printf((h->T[1] & SKEIN_T1_FLAG_FINAL) ? " Final":" ");
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printf((h->T[1] & SKEIN_T1_FLAG_BIT_PAD) ? " Pad" :" ");
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n = (uint_t) ((h->T[1] & SKEIN_T1_TREE_LVL_MASK) >> SKEIN_T1_POS_TREE_LVL);
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if (n)
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printf(" TreeLevel = %02X",n);
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printf("\n");
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fflush(stdout);
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}
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if (skein_DebugFlag & SKEIN_DEBUG_TWEAK)
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{
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printf(" Tweak:\n");
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Show64(2,h->T);
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}
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if (skein_DebugFlag & SKEIN_DEBUG_STATE)
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{
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printf(" %s words:\n",(skein_DebugFlag & SKEIN_DEBUG_THREEFISH)?"Key":"State");
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Show64(bits/64,X);
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}
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if (skein_DebugFlag & SKEIN_DEBUG_KEYSCHED)
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{
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printf(" Tweak schedule:\n");
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Show64_flag(3,tsPtr);
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printf(" Key schedule:\n");
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Show64_flag((bits/64)+1,ksPtr);
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}
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if (skein_DebugFlag & SKEIN_DEBUG_INPUT_64)
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{
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printf(" Input block (words):\n");
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Show64(bits/64,wPtr);
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}
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if (skein_DebugFlag & SKEIN_DEBUG_INPUT_08)
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{
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printf(" Input block (bytes):\n");
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Show08(bits/8,blkPtr);
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}
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}
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}
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void Skein_Show_Key(uint_t bits,const Skein_Ctxt_Hdr_t *h,const u08b_t *key,size_t keyBytes)
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{
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if (keyBytes)
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if (skein_DebugFlag & SKEIN_DEBUG_CONFIG || ((h->T[1] & SKEIN_T1_BLK_TYPE_MASK) != SKEIN_T1_BLK_TYPE_CFG))
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if (skein_DebugFlag & SKEIN_DEBUG_KEY)
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{
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printf("\n%s MAC key = %4u bytes\n",AlgoHeader(bits),(unsigned) keyBytes);
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Show08(keyBytes,key);
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}
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}
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#endif
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