1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1996-2008 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * * 19 ***********************************************************************/ 20 #pragma prototyped 21 22 /* 23 * ast4 24 */ 25 26 #define ast4_description \ 27 "The \bast\b 128 bit PRNG hash generated by catenating 4 separate 32 \ 28 bit PNRG hashes. The block count is not printed." 29 #define ast4_options 0 30 #define ast4_match "ast4|32x4|tw" 31 #define ast4_done long_done 32 #define ast4_scale 0 33 34 typedef struct Ast4_sum_s 35 { 36 uint32_t sum0; 37 uint32_t sum1; 38 uint32_t sum2; 39 uint32_t sum3; 40 } Ast4_sum_t; 41 42 typedef struct Ast4_s 43 { 44 _SUM_PUBLIC_ 45 _SUM_PRIVATE_ 46 Ast4_sum_t cur; 47 Ast4_sum_t tot; 48 unsigned char buf[sizeof(Ast4_sum_t)]; 49 } Ast4_t; 50 51 static int 52 ast4_init(Sum_t* p) 53 { 54 register Ast4_t* a = (Ast4_t*)p; 55 56 a->tot.sum0 ^= a->cur.sum0; 57 a->cur.sum0 = 0; 58 a->tot.sum1 ^= a->cur.sum1; 59 a->cur.sum1 = 0; 60 a->tot.sum2 ^= a->cur.sum2; 61 a->cur.sum2 = 0; 62 a->tot.sum3 ^= a->cur.sum3; 63 a->cur.sum3 = 0; 64 return 0; 65 } 66 67 static Sum_t* 68 ast4_open(const Method_t* method, const char* name) 69 { 70 Ast4_t* p; 71 72 if (p = newof(0, Ast4_t, 1, 0)) 73 { 74 p->method = (Method_t*)method; 75 p->name = name; 76 } 77 return (Sum_t*)p; 78 } 79 80 static int 81 ast4_block(Sum_t* p, const void* s, size_t n) 82 { 83 register Ast4_sum_t* a = &((Ast4_t*)p)->cur; 84 register unsigned char* b = (unsigned char*)s; 85 register unsigned char* e = b + n; 86 register int c; 87 88 while (b < e) 89 { 90 c = *b++; 91 a->sum0 = a->sum0 * 0x63c63cd9 + 0x9c39c33d + c; 92 a->sum1 = a->sum1 * 0x00000011 + 0x00017cfb + c; 93 a->sum2 = a->sum2 * 0x12345679 + 0x3ade68b1 + c; 94 a->sum3 = a->sum3 * 0xf1eac01d + 0xcafe10af + c; 95 } 96 return 0; 97 } 98 99 static int 100 ast4_print(Sum_t* p, Sfio_t* sp, int flags, size_t scale) 101 { 102 register Ast4_sum_t* a; 103 104 a = (flags & SUM_TOTAL) ? &((Ast4_t*)p)->tot : &((Ast4_t*)p)->cur; 105 sfprintf(sp, "%06..64u%06..64u%06..64u%06..64u", a->sum0, a->sum1, a->sum2, a->sum3); 106 return 0; 107 } 108 109 static int 110 ast4_data(Sum_t* p, Sumdata_t* data) 111 { 112 data->size = sizeof(((Ast4_t*)p)->cur); 113 data->num = 0; 114 #if _ast_intswap 115 swapmem(_ast_intswap, data->buf = ((Ast4_t*)p)->buf, &((Ast4_t*)p)->cur, sizeof(((Ast4_t*)p)->cur)); 116 #else 117 data->buf = &((Ast4_t*)p)->cur; 118 #endif 119 return 0; 120 } 121