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00019 #include <ldns/config.h>
00020 #include <ldns/ldns.h>
00021 #include <strings.h>
00022
00023 #define SHA1HANDSOFF 1
00024 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
00025
00026
00027
00028 #if BYTE_ORDER == LITTLE_ENDIAN
00029 #define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
00030 |(rol(block->l[i],8)&0x00FF00FF))
00031 #else
00032 #define blk0(i) block->l[i]
00033 #endif
00034 #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
00035 ^block->l[(i+2)&15]^block->l[i&15],1))
00036
00037
00038 #define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
00039 #define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
00040 #define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
00041 #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
00042 #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
00043
00044
00045
00046 void
00047 ldns_sha1_transform(uint32_t state[5], const unsigned char buffer[LDNS_SHA1_BLOCK_LENGTH])
00048 {
00049 uint32_t a, b, c, d, e;
00050 typedef union {
00051 unsigned char c[64];
00052 unsigned int l[16];
00053 } CHAR64LONG16;
00054 CHAR64LONG16* block;
00055 #ifdef SHA1HANDSOFF
00056 unsigned char workspace[LDNS_SHA1_BLOCK_LENGTH];
00057
00058 block = (CHAR64LONG16 *)workspace;
00059 memmove(block, buffer, LDNS_SHA1_BLOCK_LENGTH);
00060 #else
00061 block = (CHAR64LONG16 *)buffer;
00062 #endif
00063
00064 a = state[0];
00065 b = state[1];
00066 c = state[2];
00067 d = state[3];
00068 e = state[4];
00069
00070
00071 R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
00072 R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
00073 R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
00074 R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
00075 R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
00076 R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
00077 R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
00078 R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
00079 R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
00080 R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
00081 R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
00082 R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
00083 R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
00084 R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
00085 R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
00086 R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
00087 R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
00088 R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
00089 R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
00090 R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
00091
00092
00093 state[0] += a;
00094 state[1] += b;
00095 state[2] += c;
00096 state[3] += d;
00097 state[4] += e;
00098
00099 a = b = c = d = e = 0;
00100 }
00101
00102
00103
00104
00105 void
00106 ldns_sha1_init(ldns_sha1_ctx *context)
00107 {
00108
00109 context->count = 0;
00110 context->state[0] = 0x67452301;
00111 context->state[1] = 0xEFCDAB89;
00112 context->state[2] = 0x98BADCFE;
00113 context->state[3] = 0x10325476;
00114 context->state[4] = 0xC3D2E1F0;
00115 }
00116
00117
00118
00119
00120 void
00121 ldns_sha1_update(ldns_sha1_ctx *context, const unsigned char *data, unsigned int len)
00122 {
00123 unsigned int i;
00124 unsigned int j;
00125
00126 j = (unsigned)(uint32_t)((context->count >> 3) & 63);
00127 context->count += (len << 3);
00128 if ((j + len) > 63) {
00129 memmove(&context->buffer[j], data, (i = 64 - j));
00130 ldns_sha1_transform(context->state, context->buffer);
00131 for ( ; i + 63 < len; i += 64) {
00132 ldns_sha1_transform(context->state, &data[i]);
00133 }
00134 j = 0;
00135 }
00136 else i = 0;
00137 memmove(&context->buffer[j], &data[i], len - i);
00138 }
00139
00140
00141
00142
00143 void
00144 ldns_sha1_final(unsigned char digest[LDNS_SHA1_DIGEST_LENGTH], ldns_sha1_ctx *context)
00145 {
00146 unsigned int i;
00147 unsigned char finalcount[8];
00148
00149 for (i = 0; i < 8; i++) {
00150 finalcount[i] = (unsigned char)((context->count >>
00151 ((7 - (i & 7)) * 8)) & 255);
00152 }
00153 ldns_sha1_update(context, (unsigned char *)"\200", 1);
00154 while ((context->count & 504) != 448) {
00155 ldns_sha1_update(context, (unsigned char *)"\0", 1);
00156 }
00157 ldns_sha1_update(context, finalcount, 8);
00158
00159 if (digest != NULL)
00160 for (i = 0; i < LDNS_SHA1_DIGEST_LENGTH; i++) {
00161 digest[i] = (unsigned char)((context->state[i >> 2] >>
00162 ((3 - (i & 3)) * 8)) & 255);
00163 }
00164 #ifdef SHA1HANDSOFF
00165 ldns_sha1_transform(context->state, context->buffer);
00166 #endif
00167 }
00168
00169 unsigned char *
00170 ldns_sha1(unsigned char *data, unsigned int data_len, unsigned char *digest)
00171 {
00172 ldns_sha1_ctx ctx;
00173 ldns_sha1_init(&ctx);
00174 ldns_sha1_update(&ctx, data, data_len);
00175 ldns_sha1_final(digest, &ctx);
00176 return digest;
00177 }