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<h1>rpmio/digest.c</h1><a href="digest_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00005"></a>00005 <span class="preprocessor">#include "<a class="code" href="system_8h.html">system.h</a>"</span>
<a name="l00006"></a>00006 <span class="preprocessor">#include "<a class="code" href="rpmio__internal_8h.html">rpmio_internal.h</a>"</span>
<a name="l00007"></a>00007 <span class="preprocessor">#include "<a class="code" href="debug_8h.html">debug.h</a>"</span>
<a name="l00008"></a>00008
<a name="l00009"></a>00009 <span class="preprocessor">#ifdef SHA_DEBUG</span>
<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#define DPRINTF(_a) fprintf _a</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00012"></a><a class="code" href="digest_8c.html#5a59d7548c67657bf8e1741f5b18269b">00012</a> <span class="preprocessor"></span><span class="preprocessor">#define DPRINTF(_a)</span>
<a name="l00013"></a>00013 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span>
<a name="l00015"></a>00015 <span class="comment">/*@access DIGEST_CTX@*/</span>
<a name="l00016"></a>00016
<a name="l00020"></a><a class="code" href="structDIGEST__CTX__s.html">00020</a> <span class="keyword">struct </span><a class="code" href="structDIGEST__CTX__s.html">DIGEST_CTX_s</a> {
<a name="l00021"></a><a class="code" href="structDIGEST__CTX__s.html#b8138fe93265cb9b43a789542d4822b3">00021</a> <a class="code" href="group__rpmio.html#g73a4700035e8609a6e8a05a432e81e7c">rpmDigestFlags</a> <a class="code" href="structDIGEST__CTX__s.html#b8138fe93265cb9b43a789542d4822b3">flags</a>;
<a name="l00022"></a><a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">00022</a> HASHContext *<a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">hashctx</a>;
<a name="l00023"></a>00023 };
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="comment">/*@-boundsread@*/</span>
<a name="l00026"></a>00026 <a class="code" href="structDIGEST__CTX__s.html">DIGEST_CTX</a>
<a name="l00027"></a><a class="code" href="group__rpmio.html#g85489559128fb8811f8d13177151d35c">00027</a> <a class="code" href="group__rpmio.html#g85489559128fb8811f8d13177151d35c">rpmDigestDup</a>(<a class="code" href="structDIGEST__CTX__s.html">DIGEST_CTX</a> octx)
<a name="l00028"></a>00028 {
<a name="l00029"></a>00029 <a class="code" href="structDIGEST__CTX__s.html">DIGEST_CTX</a> nctx;
<a name="l00030"></a>00030 nctx = memcpy(<a class="code" href="system_8h.html#cf4d2a0b6c4f9229a0f4687202abed54">xcalloc</a>(1, <span class="keyword">sizeof</span>(*nctx)), octx, <span class="keyword">sizeof</span>(*nctx));
<a name="l00031"></a>00031 nctx->hashctx = HASH_Clone(octx-><a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">hashctx</a>);
<a name="l00032"></a>00032 <span class="keywordflow">if</span> (nctx->hashctx == NULL) {
<a name="l00033"></a>00033 fprintf(stderr, <span class="stringliteral">"HASH_Clone failed\n"</span>);
<a name="l00034"></a>00034 exit(<a class="code" href="system_8h.html#73efe787c131b385070f25d18b7c9aa4">EXIT_FAILURE</a>); <span class="comment">/* FIX: callers do not bother checking error return */</span>
<a name="l00035"></a>00035 }
<a name="l00036"></a>00036 <span class="keywordflow">return</span> nctx;
<a name="l00037"></a>00037 }
<a name="l00038"></a>00038 <span class="comment">/*@=boundsread@*/</span>
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="keyword">static</span> HASH_HashType
<a name="l00041"></a><a class="code" href="digest_8c.html#99a83278f666a98f5f839cffac39dcb0">00041</a> <a class="code" href="digest_8c.html#99a83278f666a98f5f839cffac39dcb0">getHashType</a>(<a class="code" href="rpmpgp_8h.html#7dfcf98c6e163d995601e76dc0797ca1">pgpHashAlgo</a> hashalgo)
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 <span class="keywordflow">switch</span> (hashalgo) {
<a name="l00044"></a>00044 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54ed06371dade65fdf985086d1461218820">PGPHASHALGO_MD5</a>:
<a name="l00045"></a>00045 <span class="keywordflow">return</span> HASH_AlgMD5;
<a name="l00046"></a>00046 <span class="keywordflow">break</span>;
<a name="l00047"></a>00047 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54efadb8ed49f2346f83847d7ef8e0efe24">PGPHASHALGO_SHA1</a>:
<a name="l00048"></a>00048 <span class="keywordflow">return</span> HASH_AlgSHA1;
<a name="l00049"></a>00049 <span class="keywordflow">break</span>;
<a name="l00050"></a>00050 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54e1318894b57fbacba8ca82305ba5198f2">PGPHASHALGO_SHA256</a>:
<a name="l00051"></a>00051 <span class="keywordflow">return</span> HASH_AlgSHA256;
<a name="l00052"></a>00052 <span class="keywordflow">break</span>;
<a name="l00053"></a>00053 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54e02392fb7e4ada02a9d7fc6e09ef2dbb2">PGPHASHALGO_SHA384</a>:
<a name="l00054"></a>00054 <span class="keywordflow">return</span> HASH_AlgSHA384;
<a name="l00055"></a>00055 <span class="keywordflow">break</span>;
<a name="l00056"></a>00056 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54ead5f6348a6d370be440d76cac0f7d9d2">PGPHASHALGO_SHA512</a>:
<a name="l00057"></a>00057 <span class="keywordflow">return</span> HASH_AlgSHA512;
<a name="l00058"></a>00058 <span class="keywordflow">break</span>;
<a name="l00059"></a>00059 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54e4504cec1d192341bba8b61e8ea247a54">PGPHASHALGO_RIPEMD160</a>:
<a name="l00060"></a>00060 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54e322cbc66a629ad8b3cfff47a0afb4c6b">PGPHASHALGO_MD2</a>:
<a name="l00061"></a>00061 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54e4ce911926cfe4e14187900b8540bc546">PGPHASHALGO_TIGER192</a>:
<a name="l00062"></a>00062 <span class="keywordflow">case</span> <a class="code" href="rpmpgp_8h.html#8d48cf9c33d66a07d2fee34b0875d54e2645f0e71da93e9df6a98fae0f6206f6">PGPHASHALGO_HAVAL_5_160</a>:
<a name="l00063"></a>00063 <span class="keywordflow">default</span>:
<a name="l00064"></a>00064 <span class="keywordflow">return</span> HASH_AlgNULL;
<a name="l00065"></a>00065 <span class="comment">/*@notreached@*/</span> <span class="keywordflow">break</span>;
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 size_t
<a name="l00070"></a><a class="code" href="group__rpmio.html#ga23c56ff2708514f041e09c54a28ccd0">00070</a> <a class="code" href="group__rpmio.html#ga23c56ff2708514f041e09c54a28ccd0">rpmDigestLength</a>(<a class="code" href="rpmpgp_8h.html#7dfcf98c6e163d995601e76dc0797ca1">pgpHashAlgo</a> hashalgo)
<a name="l00071"></a>00071 {
<a name="l00072"></a>00072 <span class="keywordflow">return</span> HASH_ResultLen(<a class="code" href="digest_8c.html#99a83278f666a98f5f839cffac39dcb0">getHashType</a>(hashalgo));
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <a class="code" href="structDIGEST__CTX__s.html">DIGEST_CTX</a>
<a name="l00076"></a><a class="code" href="group__rpmio.html#g38d1f7f076276f053da5f5b8e3c16b8e">00076</a> <a class="code" href="group__rpmio.html#g38d1f7f076276f053da5f5b8e3c16b8e">rpmDigestInit</a>(<a class="code" href="rpmpgp_8h.html#7dfcf98c6e163d995601e76dc0797ca1">pgpHashAlgo</a> hashalgo, <a class="code" href="group__rpmio.html#g73a4700035e8609a6e8a05a432e81e7c">rpmDigestFlags</a> flags)
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 HASH_HashType type;
<a name="l00079"></a>00079 <a class="code" href="structDIGEST__CTX__s.html">DIGEST_CTX</a> ctx = <a class="code" href="system_8h.html#cf4d2a0b6c4f9229a0f4687202abed54">xcalloc</a>(1, <span class="keyword">sizeof</span>(*ctx));
<a name="l00080"></a>00080
<a name="l00081"></a>00081 ctx->flags = flags;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 type = <a class="code" href="digest_8c.html#99a83278f666a98f5f839cffac39dcb0">getHashType</a>(hashalgo);
<a name="l00084"></a>00084 <span class="keywordflow">if</span> (type == HASH_AlgNULL) {
<a name="l00085"></a>00085 free(ctx);
<a name="l00086"></a>00086 <span class="keywordflow">return</span> NULL;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088
<a name="l00089"></a>00089 ctx->hashctx = HASH_Create(type);
<a name="l00090"></a>00090 <span class="keywordflow">if</span> (ctx->hashctx == NULL) {
<a name="l00091"></a>00091 free(ctx);
<a name="l00092"></a>00092 <span class="keywordflow">return</span> NULL;
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
<a name="l00095"></a>00095 HASH_Begin(ctx->hashctx);
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <a class="code" href="digest_8c.html#5a59d7548c67657bf8e1741f5b18269b">DPRINTF</a>((stderr, <span class="stringliteral">"*** Init(%x) ctx %p hashctx %p\n"</span>, flags, ctx, ctx->hashctx));
<a name="l00098"></a>00098 <span class="keywordflow">return</span> ctx;
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="comment">/*@-mustmod@*/</span> <span class="comment">/* LCL: ctx->hashctx may be modified, but ctx is abstract @*/</span>
<a name="l00102"></a>00102 <span class="keywordtype">int</span>
<a name="l00103"></a><a class="code" href="group__rpmio.html#gc9ca49fa22e116d5b481c666c82c579e">00103</a> <a class="code" href="group__rpmio.html#gc9ca49fa22e116d5b481c666c82c579e">rpmDigestUpdate</a>(<a class="code" href="structDIGEST__CTX__s.html">DIGEST_CTX</a> ctx, <span class="keyword">const</span> <span class="keywordtype">void</span> * data, size_t len)
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> partlen;
<a name="l00106"></a>00106 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *ptr = data;
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (ctx == NULL)
<a name="l00109"></a>00109 <span class="keywordflow">return</span> -1;
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <a class="code" href="digest_8c.html#5a59d7548c67657bf8e1741f5b18269b">DPRINTF</a>((stderr, <span class="stringliteral">"*** Update(%p,%p,%d) hashctx %p \"%s\"\n"</span>, ctx, data, len, ctx-><a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">hashctx</a>, ((<span class="keywordtype">char</span> *)data)));
<a name="l00112"></a>00112 <span class="comment">/*@-boundsread@*/</span>
<a name="l00113"></a>00113 partlen = ~(<span class="keywordtype">unsigned</span> int)0xFF;
<a name="l00114"></a>00114 <span class="keywordflow">while</span> (len > 0) {
<a name="l00115"></a>00115 <span class="keywordflow">if</span> (len < partlen) {
<a name="l00116"></a>00116 partlen = (<span class="keywordtype">unsigned</span> int)len;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118 HASH_Update(ctx-><a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">hashctx</a>, ptr, partlen);
<a name="l00119"></a>00119 ptr += partlen;
<a name="l00120"></a>00120 len -= partlen;
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122 <span class="keywordflow">return</span> 0;
<a name="l00123"></a>00123 <span class="comment">/*@=boundsread@*/</span>
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 <span class="comment">/*@=mustmod@*/</span>
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="comment">/*@-boundswrite@*/</span>
<a name="l00128"></a>00128 <span class="keywordtype">int</span>
<a name="l00129"></a><a class="code" href="group__rpmio.html#g54e20bdf025588cd2f2bb640b7978de9">00129</a> <a class="code" href="group__rpmio.html#g54e20bdf025588cd2f2bb640b7978de9">rpmDigestFinal</a>(<a class="code" href="structDIGEST__CTX__s.html">DIGEST_CTX</a> ctx, <span class="keywordtype">void</span> ** datap, size_t *lenp, <span class="keywordtype">int</span> asAscii)
<a name="l00130"></a>00130 {
<a name="l00131"></a>00131 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> * digest;
<a name="l00132"></a>00132 <span class="keywordtype">char</span> * t;
<a name="l00133"></a>00133 <span class="keywordtype">int</span> i;
<a name="l00134"></a>00134 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> digestlen;
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <span class="keywordflow">if</span> (ctx == NULL)
<a name="l00137"></a>00137 <span class="keywordflow">return</span> -1;
<a name="l00138"></a>00138 digestlen = HASH_ResultLenContext(ctx-><a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">hashctx</a>);
<a name="l00139"></a>00139 digest = <a class="code" href="system_8h.html#42ccfa6fc49cc4ce90cc44cd05052490">xmalloc</a>(digestlen);
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <a class="code" href="digest_8c.html#5a59d7548c67657bf8e1741f5b18269b">DPRINTF</a>((stderr, <span class="stringliteral">"*** Final(%p,%p,%p,%d) hashctx %p digest %p\n"</span>, ctx, datap, lenp, asAscii, ctx-><a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">hashctx</a>, digest));
<a name="l00142"></a>00142 <span class="comment">/*@-noeffectuncon@*/</span>
<a name="l00143"></a>00143 HASH_End(ctx-><a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">hashctx</a>, digest, &digestlen, digestlen);
<a name="l00144"></a>00144 <span class="comment">/*@=noeffectuncon@*/</span>
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="comment">/* Return final digest. */</span>
<a name="l00147"></a>00147 <span class="comment">/*@-branchstate@*/</span>
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (!asAscii) {
<a name="l00149"></a>00149 <span class="keywordflow">if</span> (lenp) *lenp = digestlen;
<a name="l00150"></a>00150 <span class="keywordflow">if</span> (datap) {
<a name="l00151"></a>00151 *datap = digest;
<a name="l00152"></a>00152 digest = NULL;
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154 } <span class="keywordflow">else</span> {
<a name="l00155"></a>00155 <span class="keywordflow">if</span> (lenp) *lenp = (2*digestlen) + 1;
<a name="l00156"></a>00156 <span class="keywordflow">if</span> (datap) {
<a name="l00157"></a>00157 <span class="keyword">const</span> <a class="code" href="rpmpgp_8h.html#0c8186d9b9b7880309c27230bbb5e69d">byte</a> * s = (<span class="keyword">const</span> <a class="code" href="rpmpgp_8h.html#0c8186d9b9b7880309c27230bbb5e69d">byte</a> *) digest;
<a name="l00158"></a>00158 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> hex[] = <span class="stringliteral">"0123456789abcdef"</span>;
<a name="l00159"></a>00159
<a name="l00160"></a>00160 *datap = t = <a class="code" href="system_8h.html#42ccfa6fc49cc4ce90cc44cd05052490">xmalloc</a>((2*digestlen) + 1);
<a name="l00161"></a>00161 <span class="keywordflow">for</span> (i = 0 ; i < digestlen; i++) {
<a name="l00162"></a>00162 *t++ = hex[ (<span class="keywordtype">unsigned</span>)((*s >> 4) & 0x0f) ];
<a name="l00163"></a>00163 *t++ = hex[ (unsigned)((*s++ ) & 0x0f) ];
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 *t = <span class="charliteral">'\0'</span>;
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168 <span class="comment">/*@=branchstate@*/</span>
<a name="l00169"></a>00169 <span class="keywordflow">if</span> (digest) {
<a name="l00170"></a>00170 memset(digest, 0, digestlen); <span class="comment">/* In case it's sensitive */</span>
<a name="l00171"></a>00171 free(digest);
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173 HASH_Destroy(ctx-><a class="code" href="structDIGEST__CTX__s.html#24c9b17cc0df9c950737c402a1dba274">hashctx</a>);
<a name="l00174"></a>00174 memset(ctx, 0, <span class="keyword">sizeof</span>(*ctx)); <span class="comment">/* In case it's sensitive */</span>
<a name="l00175"></a>00175 free(ctx);
<a name="l00176"></a>00176 <span class="keywordflow">return</span> 0;
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178 <span class="comment">/*@=boundswrite@*/</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on 1 Oct 2013 for rpm by
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