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<div class="title">sha1.c</div> </div>
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<a href="sha1_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * modified for ldns by Jelte Jansen, original taken from OpenBSD:</span>
<a name="l00003"></a>00003 <span class="comment"> * </span>
<a name="l00004"></a>00004 <span class="comment"> * SHA-1 in C</span>
<a name="l00005"></a>00005 <span class="comment"> * By Steve Reid <steve@edmweb.com></span>
<a name="l00006"></a>00006 <span class="comment"> * 100% Public Domain</span>
<a name="l00007"></a>00007 <span class="comment"> * </span>
<a name="l00008"></a>00008 <span class="comment"> * Test Vectors (from FIPS PUB 180-1)</span>
<a name="l00009"></a>00009 <span class="comment"> * "abc"</span>
<a name="l00010"></a>00010 <span class="comment"> * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D</span>
<a name="l00011"></a>00011 <span class="comment"> * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"</span>
<a name="l00012"></a>00012 <span class="comment"> * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1</span>
<a name="l00013"></a>00013 <span class="comment"> * A million repetitions of "a"</span>
<a name="l00014"></a>00014 <span class="comment"> * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F</span>
<a name="l00015"></a>00015 <span class="comment">*/</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="comment">/* #define LITTLE_ENDIAN * This should be #define'd already, if true. */</span>
<a name="l00018"></a>00018 <span class="comment">/* #define SHA1HANDSOFF * Copies data before messing with it. */</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#include <<a class="code" href="ldns_2config_8h.html">ldns/config.h</a>></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <<a class="code" href="ldns_8h.html" title="Including this file will include all ldns files, and define some lookup tables.">ldns/ldns.h</a>></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <strings.h></span>
<a name="l00023"></a>00023
<a name="l00024"></a><a class="code" href="sha1_8c.html#af1373930110e4f86cb1f4bc6d44a66ee">00024</a> <span class="preprocessor">#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span>
<a name="l00026"></a>00026 <span class="comment">/* blk0() and blk() perform the initial expand. */</span>
<a name="l00027"></a>00027 <span class="comment">/* I got the idea of expanding during the round function from SSLeay */</span>
<a name="l00028"></a>00028 <span class="preprocessor">#if BYTE_ORDER == LITTLE_ENDIAN</span>
<a name="l00029"></a><a class="code" href="sha1_8c.html#a1a75de24d0277c5319098c218efaef2d">00029</a> <span class="preprocessor"></span><span class="preprocessor">#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \</span>
<a name="l00030"></a>00030 <span class="preprocessor"> |(rol(block->l[i],8)&0x00FF00FF))</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span><span class="preprocessor">#define blk0(i) block->l[i]</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00034"></a><a class="code" href="sha1_8c.html#abd06ff24e9f6f5f0a9c32a1cba4b0f9c">00034</a> <span class="preprocessor"></span><span class="preprocessor">#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \</span>
<a name="l00035"></a>00035 <span class="preprocessor"> ^block->l[(i+2)&15]^block->l[i&15],1))</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span>
<a name="l00037"></a>00037 <span class="comment">/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */</span>
<a name="l00038"></a><a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">00038</a> <span class="preprocessor">#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);</span>
<a name="l00039"></a><a class="code" href="sha1_8c.html#a2628f8af7bf67ca052200537279f855a">00039</a> <span class="preprocessor"></span><span class="preprocessor">#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);</span>
<a name="l00040"></a><a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">00040</a> <span class="preprocessor"></span><span class="preprocessor">#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);</span>
<a name="l00041"></a><a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">00041</a> <span class="preprocessor"></span><span class="preprocessor">#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);</span>
<a name="l00042"></a><a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">00042</a> <span class="preprocessor"></span><span class="preprocessor">#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span>
<a name="l00044"></a>00044 <span class="comment">/* Hash a single 512-bit block. This is the core of the algorithm. */</span>
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="keywordtype">void</span>
<a name="l00047"></a><a class="code" href="sha1_8h.html#a9ea2f7a2ced91d1f38ab0be583d79a9e">00047</a> <a class="code" href="sha1_8c.html#a9ea2f7a2ced91d1f38ab0be583d79a9e">ldns_sha1_transform</a>(uint32_t state[5], <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buffer[<a class="code" href="sha1_8h.html#a589b3a93d8f2730585eea1eb5f3207d2">LDNS_SHA1_BLOCK_LENGTH</a>])
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 uint32_t a, b, c, d, e;
<a name="l00050"></a>00050 <span class="keyword">typedef</span> <span class="keyword">union </span>{
<a name="l00051"></a>00051 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c[64];
<a name="l00052"></a>00052 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> l[16];
<a name="l00053"></a>00053 } CHAR64LONG16;
<a name="l00054"></a>00054 CHAR64LONG16* block;
<a name="l00055"></a>00055 <span class="preprocessor">#ifdef SHA1HANDSOFF</span>
<a name="l00056"></a>00056 <span class="preprocessor"></span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> workspace[<a class="code" href="sha1_8h.html#a589b3a93d8f2730585eea1eb5f3207d2">LDNS_SHA1_BLOCK_LENGTH</a>];
<a name="l00057"></a>00057
<a name="l00058"></a>00058 block = (CHAR64LONG16 *)workspace;
<a name="l00059"></a>00059 <a class="code" href="config_8h.html#a802c986820d3866639922b6bc9484f90">memmove</a>(block, buffer, LDNS_SHA1_BLOCK_LENGTH);
<a name="l00060"></a>00060 <span class="preprocessor">#else</span>
<a name="l00061"></a>00061 <span class="preprocessor"></span> block = (CHAR64LONG16 *)buffer;
<a name="l00062"></a>00062 <span class="preprocessor">#endif</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span> <span class="comment">/* Copy context->state[] to working vars */</span>
<a name="l00064"></a>00064 a = state[0];
<a name="l00065"></a>00065 b = state[1];
<a name="l00066"></a>00066 c = state[2];
<a name="l00067"></a>00067 d = state[3];
<a name="l00068"></a>00068 e = state[4];
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="comment">/* 4 rounds of 20 operations each. Loop unrolled. */</span>
<a name="l00071"></a>00071 <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(a,b,c,d,e, 0); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(e,a,b,c,d, 1); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(d,e,a,b,c, 2); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(c,d,e,a,b, 3);
<a name="l00072"></a>00072 <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(b,c,d,e,a, 4); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(a,b,c,d,e, 5); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(e,a,b,c,d, 6); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(d,e,a,b,c, 7);
<a name="l00073"></a>00073 <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(c,d,e,a,b, 8); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(b,c,d,e,a, 9); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(a,b,c,d,e,10); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(e,a,b,c,d,11);
<a name="l00074"></a>00074 <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(d,e,a,b,c,12); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(c,d,e,a,b,13); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(b,c,d,e,a,14); <a class="code" href="sha1_8c.html#a8ac24a09e1273548828d3cc9436f9bc7">R0</a>(a,b,c,d,e,15);
<a name="l00075"></a>00075 <a class="code" href="sha1_8c.html#a2628f8af7bf67ca052200537279f855a">R1</a>(e,a,b,c,d,16); <a class="code" href="sha1_8c.html#a2628f8af7bf67ca052200537279f855a">R1</a>(d,e,a,b,c,17); <a class="code" href="sha1_8c.html#a2628f8af7bf67ca052200537279f855a">R1</a>(c,d,e,a,b,18); <a class="code" href="sha1_8c.html#a2628f8af7bf67ca052200537279f855a">R1</a>(b,c,d,e,a,19);
<a name="l00076"></a>00076 <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(a,b,c,d,e,20); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(e,a,b,c,d,21); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(d,e,a,b,c,22); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(c,d,e,a,b,23);
<a name="l00077"></a>00077 <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(b,c,d,e,a,24); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(a,b,c,d,e,25); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(e,a,b,c,d,26); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(d,e,a,b,c,27);
<a name="l00078"></a>00078 <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(c,d,e,a,b,28); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(b,c,d,e,a,29); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(a,b,c,d,e,30); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(e,a,b,c,d,31);
<a name="l00079"></a>00079 <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(d,e,a,b,c,32); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(c,d,e,a,b,33); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(b,c,d,e,a,34); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(a,b,c,d,e,35);
<a name="l00080"></a>00080 <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(e,a,b,c,d,36); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(d,e,a,b,c,37); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(c,d,e,a,b,38); <a class="code" href="sha1_8c.html#a774229b80509be0e9e0a1d9819580224">R2</a>(b,c,d,e,a,39);
<a name="l00081"></a>00081 <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(a,b,c,d,e,40); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(e,a,b,c,d,41); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(d,e,a,b,c,42); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(c,d,e,a,b,43);
<a name="l00082"></a>00082 <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(b,c,d,e,a,44); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(a,b,c,d,e,45); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(e,a,b,c,d,46); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(d,e,a,b,c,47);
<a name="l00083"></a>00083 <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(c,d,e,a,b,48); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(b,c,d,e,a,49); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(a,b,c,d,e,50); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(e,a,b,c,d,51);
<a name="l00084"></a>00084 <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(d,e,a,b,c,52); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(c,d,e,a,b,53); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(b,c,d,e,a,54); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(a,b,c,d,e,55);
<a name="l00085"></a>00085 <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(e,a,b,c,d,56); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(d,e,a,b,c,57); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(c,d,e,a,b,58); <a class="code" href="sha1_8c.html#ac0b8b342432d17717ff1020d10cf0eea">R3</a>(b,c,d,e,a,59);
<a name="l00086"></a>00086 <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(a,b,c,d,e,60); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(e,a,b,c,d,61); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(d,e,a,b,c,62); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(c,d,e,a,b,63);
<a name="l00087"></a>00087 <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(b,c,d,e,a,64); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(a,b,c,d,e,65); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(e,a,b,c,d,66); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(d,e,a,b,c,67);
<a name="l00088"></a>00088 <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(c,d,e,a,b,68); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(b,c,d,e,a,69); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(a,b,c,d,e,70); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(e,a,b,c,d,71);
<a name="l00089"></a>00089 <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(d,e,a,b,c,72); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(c,d,e,a,b,73); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(b,c,d,e,a,74); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(a,b,c,d,e,75);
<a name="l00090"></a>00090 <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(e,a,b,c,d,76); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(d,e,a,b,c,77); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(c,d,e,a,b,78); <a class="code" href="sha1_8c.html#af77ddc8894422d2af2adbd4e71e55d1f">R4</a>(b,c,d,e,a,79);
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="comment">/* Add the working vars back into context.state[] */</span>
<a name="l00093"></a>00093 state[0] += a;
<a name="l00094"></a>00094 state[1] += b;
<a name="l00095"></a>00095 state[2] += c;
<a name="l00096"></a>00096 state[3] += d;
<a name="l00097"></a>00097 state[4] += e;
<a name="l00098"></a>00098 <span class="comment">/* Wipe variables */</span>
<a name="l00099"></a>00099 a = b = c = d = e = 0;
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="comment">/* SHA1Init - Initialize new context */</span>
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="keywordtype">void</span>
<a name="l00106"></a><a class="code" href="sha1_8h.html#af7ff78a4aaf1013c338b8395ba1b7fdf">00106</a> <a class="code" href="sha1_8c.html#af7ff78a4aaf1013c338b8395ba1b7fdf">ldns_sha1_init</a>(<a class="code" href="structldns__sha1__ctx.html">ldns_sha1_ctx</a> *context)
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 <span class="comment">/* SHA1 initialization constants */</span>
<a name="l00109"></a>00109 context-><a class="code" href="structldns__sha1__ctx.html#ae6cfdad8c2b999d3544d68892479b654">count</a> = 0;
<a name="l00110"></a>00110 context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>[0] = 0x67452301;
<a name="l00111"></a>00111 context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>[1] = 0xEFCDAB89;
<a name="l00112"></a>00112 context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>[2] = 0x98BADCFE;
<a name="l00113"></a>00113 context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>[3] = 0x10325476;
<a name="l00114"></a>00114 context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>[4] = 0xC3D2E1F0;
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">/* Run your data through this. */</span>
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keywordtype">void</span>
<a name="l00121"></a><a class="code" href="sha1_8h.html#a7006e55e7b5771b645763883fa15cd36">00121</a> <a class="code" href="sha1_8c.html#a7006e55e7b5771b645763883fa15cd36">ldns_sha1_update</a>(<a class="code" href="structldns__sha1__ctx.html">ldns_sha1_ctx</a> *context, <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *data, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len)
<a name="l00122"></a>00122 {
<a name="l00123"></a>00123 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;
<a name="l00124"></a>00124 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> j;
<a name="l00125"></a>00125
<a name="l00126"></a>00126 j = (unsigned)(uint32_t)((context-><a class="code" href="structldns__sha1__ctx.html#ae6cfdad8c2b999d3544d68892479b654">count</a> >> 3) & 63);
<a name="l00127"></a>00127 context-><a class="code" href="structldns__sha1__ctx.html#ae6cfdad8c2b999d3544d68892479b654">count</a> += (len << 3);
<a name="l00128"></a>00128 <span class="keywordflow">if</span> ((j + len) > 63) {
<a name="l00129"></a>00129 <a class="code" href="config_8h.html#a802c986820d3866639922b6bc9484f90">memmove</a>(&context-><a class="code" href="structldns__sha1__ctx.html#a7b64588c87f17e88161dea1a3ab8ddab">buffer</a>[j], data, (i = 64 - j));
<a name="l00130"></a>00130 <a class="code" href="sha1_8c.html#a9ea2f7a2ced91d1f38ab0be583d79a9e">ldns_sha1_transform</a>(context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>, context-><a class="code" href="structldns__sha1__ctx.html#a7b64588c87f17e88161dea1a3ab8ddab">buffer</a>);
<a name="l00131"></a>00131 <span class="keywordflow">for</span> ( ; i + 63 < len; i += 64) {
<a name="l00132"></a>00132 <a class="code" href="sha1_8c.html#a9ea2f7a2ced91d1f38ab0be583d79a9e">ldns_sha1_transform</a>(context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>, &data[i]);
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134 j = 0;
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136 <span class="keywordflow">else</span> i = 0;
<a name="l00137"></a>00137 <a class="code" href="config_8h.html#a802c986820d3866639922b6bc9484f90">memmove</a>(&context-><a class="code" href="structldns__sha1__ctx.html#a7b64588c87f17e88161dea1a3ab8ddab">buffer</a>[j], &data[i], len - i);
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">/* Add padding and return the message digest. */</span>
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="keywordtype">void</span>
<a name="l00144"></a><a class="code" href="sha1_8h.html#aad1b0d3aa8cd99d3c6849f84a72bf535">00144</a> <a class="code" href="sha1_8c.html#aad1b0d3aa8cd99d3c6849f84a72bf535">ldns_sha1_final</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> digest[<a class="code" href="sha1_8h.html#a5426eb9c967f56cb3d53d0b6fe14d2ac">LDNS_SHA1_DIGEST_LENGTH</a>], <a class="code" href="structldns__sha1__ctx.html">ldns_sha1_ctx</a> *context)
<a name="l00145"></a>00145 {
<a name="l00146"></a>00146 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;
<a name="l00147"></a>00147 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> finalcount[8];
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <span class="keywordflow">for</span> (i = 0; i < 8; i++) {
<a name="l00150"></a>00150 finalcount[i] = (<span class="keywordtype">unsigned</span> char)((context-><a class="code" href="structldns__sha1__ctx.html#ae6cfdad8c2b999d3544d68892479b654">count</a> >>
<a name="l00151"></a>00151 ((7 - (i & 7)) * 8)) & 255); <span class="comment">/* Endian independent */</span>
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153 <a class="code" href="sha1_8c.html#a7006e55e7b5771b645763883fa15cd36">ldns_sha1_update</a>(context, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *)<span class="stringliteral">"\200"</span>, 1);
<a name="l00154"></a>00154 <span class="keywordflow">while</span> ((context-><a class="code" href="structldns__sha1__ctx.html#ae6cfdad8c2b999d3544d68892479b654">count</a> & 504) != 448) {
<a name="l00155"></a>00155 <a class="code" href="sha1_8c.html#a7006e55e7b5771b645763883fa15cd36">ldns_sha1_update</a>(context, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *)<span class="stringliteral">"\0"</span>, 1);
<a name="l00156"></a>00156 }
<a name="l00157"></a>00157 <a class="code" href="sha1_8c.html#a7006e55e7b5771b645763883fa15cd36">ldns_sha1_update</a>(context, finalcount, 8); <span class="comment">/* Should cause a SHA1Transform() */</span>
<a name="l00158"></a>00158
<a name="l00159"></a>00159 <span class="keywordflow">if</span> (digest != NULL)
<a name="l00160"></a>00160 <span class="keywordflow">for</span> (i = 0; i < <a class="code" href="sha1_8h.html#a5426eb9c967f56cb3d53d0b6fe14d2ac">LDNS_SHA1_DIGEST_LENGTH</a>; i++) {
<a name="l00161"></a>00161 digest[i] = (<span class="keywordtype">unsigned</span> char)((context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>[i >> 2] >>
<a name="l00162"></a>00162 ((3 - (i & 3)) * 8)) & 255);
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164 <span class="preprocessor">#ifdef SHA1HANDSOFF </span><span class="comment">/* make SHA1Transform overwrite its own static vars */</span>
<a name="l00165"></a>00165 <a class="code" href="sha1_8c.html#a9ea2f7a2ced91d1f38ab0be583d79a9e">ldns_sha1_transform</a>(context-><a class="code" href="structldns__sha1__ctx.html#a3061973cc6685523efcf31cfff26bf47">state</a>, context-><a class="code" href="structldns__sha1__ctx.html#a7b64588c87f17e88161dea1a3ab8ddab">buffer</a>);
<a name="l00166"></a>00166 <span class="preprocessor">#endif</span>
<a name="l00167"></a>00167 <span class="preprocessor"></span>}
<a name="l00168"></a>00168
<a name="l00169"></a>00169 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *
<a name="l00170"></a><a class="code" href="sha1_8h.html#a14a9873e7068caf02c57d67fd88fb6d3">00170</a> <a class="code" href="sha1_8c.html#a14a9873e7068caf02c57d67fd88fb6d3" title="Convenience function to digest a fixed block of data at once.">ldns_sha1</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *data, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> data_len, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *digest)
<a name="l00171"></a>00171 {
<a name="l00172"></a>00172 <a class="code" href="structldns__sha1__ctx.html">ldns_sha1_ctx</a> ctx;
<a name="l00173"></a>00173 <a class="code" href="sha1_8c.html#af7ff78a4aaf1013c338b8395ba1b7fdf">ldns_sha1_init</a>(&ctx);
<a name="l00174"></a>00174 <a class="code" href="sha1_8c.html#a7006e55e7b5771b645763883fa15cd36">ldns_sha1_update</a>(&ctx, data, data_len);
<a name="l00175"></a>00175 <a class="code" href="sha1_8c.html#aad1b0d3aa8cd99d3c6849f84a72bf535">ldns_sha1_final</a>(digest, &ctx);
<a name="l00176"></a>00176 <span class="keywordflow">return</span> digest;
<a name="l00177"></a>00177 }
</pre></div></div>
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