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<p>Generic message digest wrapper.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include <stddef.h></code><br />
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Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Generic message digest context. <a href="structmbedtls__md__context__t.html#details">More...</a><br /></td></tr>
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Macros</h2></td></tr>
<tr class="memitem:a121b228f0512def159e3bd4ced07633b"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a121b228f0512def159e3bd4ced07633b">MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE</a>   -0x5080</td></tr>
<tr class="memdesc:a121b228f0512def159e3bd4ced07633b"><td class="mdescLeft"> </td><td class="mdescRight">The selected feature is not available. <a href="#a121b228f0512def159e3bd4ced07633b">More...</a><br /></td></tr>
<tr class="separator:a121b228f0512def159e3bd4ced07633b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aeeb355bf3d3d39a2a6ba50544139b9a7"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#aeeb355bf3d3d39a2a6ba50544139b9a7">MBEDTLS_ERR_MD_BAD_INPUT_DATA</a>   -0x5100</td></tr>
<tr class="memdesc:aeeb355bf3d3d39a2a6ba50544139b9a7"><td class="mdescLeft"> </td><td class="mdescRight">Bad input parameters to function. <a href="#aeeb355bf3d3d39a2a6ba50544139b9a7">More...</a><br /></td></tr>
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<tr class="memitem:a7e7a4f1a618afbb412ef82ca2e572140"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a7e7a4f1a618afbb412ef82ca2e572140">MBEDTLS_ERR_MD_ALLOC_FAILED</a>   -0x5180</td></tr>
<tr class="memdesc:a7e7a4f1a618afbb412ef82ca2e572140"><td class="mdescLeft"> </td><td class="mdescRight">Failed to allocate memory. <a href="#a7e7a4f1a618afbb412ef82ca2e572140">More...</a><br /></td></tr>
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<tr class="memitem:aab0a160e4b0efdd4cc8cbe12b4813047"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#aab0a160e4b0efdd4cc8cbe12b4813047">MBEDTLS_ERR_MD_FILE_IO_ERROR</a>   -0x5200</td></tr>
<tr class="memdesc:aab0a160e4b0efdd4cc8cbe12b4813047"><td class="mdescLeft"> </td><td class="mdescRight">Opening or reading of file failed. <a href="#aab0a160e4b0efdd4cc8cbe12b4813047">More...</a><br /></td></tr>
<tr class="separator:aab0a160e4b0efdd4cc8cbe12b4813047"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad3e0e65cb5b289a358b83b5af1fdd41b"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#ad3e0e65cb5b289a358b83b5af1fdd41b">MBEDTLS_MD_MAX_SIZE</a>   32 /* longest known is SHA256 or less */</td></tr>
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<tr class="memitem:aa9f53b232ef244efb301233d111930dc"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#aa9f53b232ef244efb301233d111930dc">MBEDTLS_DEPRECATED</a></td></tr>
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Typedefs</h2></td></tr>
<tr class="memitem:a496e73a6f229eba89b4abd9955822adb"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a></td></tr>
<tr class="memdesc:a496e73a6f229eba89b4abd9955822adb"><td class="mdescLeft"> </td><td class="mdescRight">Opaque struct defined in md_internal.h. <a href="#a496e73a6f229eba89b4abd9955822adb">More...</a><br /></td></tr>
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Enumerations</h2></td></tr>
<tr class="memitem:a219313cb40503ec3e34a857ab98b2296"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296">mbedtls_md_type_t</a> { <br />
  <a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a564288006d735f75738021342ca5f9d1">MBEDTLS_MD_NONE</a> =0,
<a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296af765a736e226d2832625c3267c8c2472">MBEDTLS_MD_MD2</a>,
<a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a8f31ceaa511350d5da8393a7ce4a5704">MBEDTLS_MD_MD4</a>,
<a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a14fbb8d456ae15f082c2360200cd50bf">MBEDTLS_MD_MD5</a>,
<br />
  <a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a800a5ff57003d84ac73f1aadeaaf00fe">MBEDTLS_MD_SHA1</a>,
<a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a77e7fbd0fa5e31e7e1c9295928568f74">MBEDTLS_MD_SHA224</a>,
<a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a7634aa1a264b0e1a5ec65f4ed77468f8">MBEDTLS_MD_SHA256</a>,
<a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a39dd5c95e28fac45c3f18e55b11329cb">MBEDTLS_MD_SHA384</a>,
<br />
  <a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a0cdbe8272ceee7d63b2bfadd5ed05c26">MBEDTLS_MD_SHA512</a>,
<a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296a1c358adae154d70c5eb131efcb5d4caf">MBEDTLS_MD_RIPEMD160</a>
<br />
}</td></tr>
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Functions</h2></td></tr>
<tr class="memitem:a51dc7cc39a5bf5b894cc1616bf798c06"><td class="memItemLeft" align="right" valign="top">const int * </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a51dc7cc39a5bf5b894cc1616bf798c06">mbedtls_md_list</a> (void)</td></tr>
<tr class="memdesc:a51dc7cc39a5bf5b894cc1616bf798c06"><td class="mdescLeft"> </td><td class="mdescRight">Returns the list of digests supported by the generic digest module. <a href="#a51dc7cc39a5bf5b894cc1616bf798c06">More...</a><br /></td></tr>
<tr class="separator:a51dc7cc39a5bf5b894cc1616bf798c06"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac4619cce171e558d059baae35da50a2a"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#ac4619cce171e558d059baae35da50a2a">mbedtls_md_info_from_string</a> (const char *md_name)</td></tr>
<tr class="memdesc:ac4619cce171e558d059baae35da50a2a"><td class="mdescLeft"> </td><td class="mdescRight">Returns the message digest information associated with the given digest name. <a href="#ac4619cce171e558d059baae35da50a2a">More...</a><br /></td></tr>
<tr class="separator:ac4619cce171e558d059baae35da50a2a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aca53b51e0c8eb0e07c7eb4a3e6acfa0d"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#aca53b51e0c8eb0e07c7eb4a3e6acfa0d">mbedtls_md_info_from_type</a> (<a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296">mbedtls_md_type_t</a> md_type)</td></tr>
<tr class="memdesc:aca53b51e0c8eb0e07c7eb4a3e6acfa0d"><td class="mdescLeft"> </td><td class="mdescRight">Returns the message digest information associated with the given digest type. <a href="#aca53b51e0c8eb0e07c7eb4a3e6acfa0d">More...</a><br /></td></tr>
<tr class="separator:aca53b51e0c8eb0e07c7eb4a3e6acfa0d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad8b02927ca10552e3cbf293fa8c10e24"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#ad8b02927ca10552e3cbf293fa8c10e24">mbedtls_md_init</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx)</td></tr>
<tr class="memdesc:ad8b02927ca10552e3cbf293fa8c10e24"><td class="mdescLeft"> </td><td class="mdescRight">Initialize a md_context (as NONE) This should always be called first. <a href="#ad8b02927ca10552e3cbf293fa8c10e24">More...</a><br /></td></tr>
<tr class="separator:ad8b02927ca10552e3cbf293fa8c10e24"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af3248ddb6ad05035292fa92ac4af2587"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#af3248ddb6ad05035292fa92ac4af2587">mbedtls_md_free</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx)</td></tr>
<tr class="memdesc:af3248ddb6ad05035292fa92ac4af2587"><td class="mdescLeft"> </td><td class="mdescRight">Free and clear the internal structures of ctx. <a href="#af3248ddb6ad05035292fa92ac4af2587">More...</a><br /></td></tr>
<tr class="separator:af3248ddb6ad05035292fa92ac4af2587"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a40d6e9a8c2ee4d9c24782d4dd6fc7c36"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a40d6e9a8c2ee4d9c24782d4dd6fc7c36">mbedtls_md_init_ctx</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx, const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> *md_info) <a class="el" href="md_8h.html#aa9f53b232ef244efb301233d111930dc">MBEDTLS_DEPRECATED</a></td></tr>
<tr class="memdesc:a40d6e9a8c2ee4d9c24782d4dd6fc7c36"><td class="mdescLeft"> </td><td class="mdescRight">Select MD to use and allocate internal structures. <a href="#a40d6e9a8c2ee4d9c24782d4dd6fc7c36">More...</a><br /></td></tr>
<tr class="separator:a40d6e9a8c2ee4d9c24782d4dd6fc7c36"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a1b858111212997b90bd7d2c71010a7ec"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a1b858111212997b90bd7d2c71010a7ec">mbedtls_md_setup</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx, const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> *md_info, int hmac)</td></tr>
<tr class="memdesc:a1b858111212997b90bd7d2c71010a7ec"><td class="mdescLeft"> </td><td class="mdescRight">Select MD to use and allocate internal structures. <a href="#a1b858111212997b90bd7d2c71010a7ec">More...</a><br /></td></tr>
<tr class="separator:a1b858111212997b90bd7d2c71010a7ec"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5140622773fa71bbe87ca521e57ff8c2"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a5140622773fa71bbe87ca521e57ff8c2">mbedtls_md_clone</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *dst, const <a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *src)</td></tr>
<tr class="memdesc:a5140622773fa71bbe87ca521e57ff8c2"><td class="mdescLeft"> </td><td class="mdescRight">Clone the state of an MD context. <a href="#a5140622773fa71bbe87ca521e57ff8c2">More...</a><br /></td></tr>
<tr class="separator:a5140622773fa71bbe87ca521e57ff8c2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ae20f4ddcf2bbf2e59cafc6fab8c993d6"><td class="memItemLeft" align="right" valign="top">unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#ae20f4ddcf2bbf2e59cafc6fab8c993d6">mbedtls_md_get_size</a> (const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> *md_info)</td></tr>
<tr class="memdesc:ae20f4ddcf2bbf2e59cafc6fab8c993d6"><td class="mdescLeft"> </td><td class="mdescRight">Returns the size of the message digest output. <a href="#ae20f4ddcf2bbf2e59cafc6fab8c993d6">More...</a><br /></td></tr>
<tr class="separator:ae20f4ddcf2bbf2e59cafc6fab8c993d6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7a084e1b71c78daa7071691f60de5131"><td class="memItemLeft" align="right" valign="top"><a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296">mbedtls_md_type_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a7a084e1b71c78daa7071691f60de5131">mbedtls_md_get_type</a> (const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> *md_info)</td></tr>
<tr class="memdesc:a7a084e1b71c78daa7071691f60de5131"><td class="mdescLeft"> </td><td class="mdescRight">Returns the type of the message digest output. <a href="#a7a084e1b71c78daa7071691f60de5131">More...</a><br /></td></tr>
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<tr class="memitem:a3ceb9e6b3d4b21612ef5d7532872c6bc"><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a3ceb9e6b3d4b21612ef5d7532872c6bc">mbedtls_md_get_name</a> (const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> *md_info)</td></tr>
<tr class="memdesc:a3ceb9e6b3d4b21612ef5d7532872c6bc"><td class="mdescLeft"> </td><td class="mdescRight">Returns the name of the message digest output. <a href="#a3ceb9e6b3d4b21612ef5d7532872c6bc">More...</a><br /></td></tr>
<tr class="separator:a3ceb9e6b3d4b21612ef5d7532872c6bc"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a24483eff556810e3489ac6abefa328e6"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a24483eff556810e3489ac6abefa328e6">mbedtls_md_starts</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx)</td></tr>
<tr class="memdesc:a24483eff556810e3489ac6abefa328e6"><td class="mdescLeft"> </td><td class="mdescRight">Prepare the context to digest a new message. <a href="#a24483eff556810e3489ac6abefa328e6">More...</a><br /></td></tr>
<tr class="separator:a24483eff556810e3489ac6abefa328e6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7e50ce3a8c75b5221d07be657b93ca94"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a7e50ce3a8c75b5221d07be657b93ca94">mbedtls_md_update</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx, const unsigned char *input, size_t ilen)</td></tr>
<tr class="memdesc:a7e50ce3a8c75b5221d07be657b93ca94"><td class="mdescLeft"> </td><td class="mdescRight">Generic message digest process buffer Called between <a class="el" href="md_8h.html#a24483eff556810e3489ac6abefa328e6" title="Prepare the context to digest a new message. ">mbedtls_md_starts()</a> and <a class="el" href="md_8h.html#adf77ab9b0f117367883988ee5f0af1f4" title="Generic message digest final digest Called after mbedtls_md_update(). ">mbedtls_md_finish()</a>. <a href="#a7e50ce3a8c75b5221d07be657b93ca94">More...</a><br /></td></tr>
<tr class="separator:a7e50ce3a8c75b5221d07be657b93ca94"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adf77ab9b0f117367883988ee5f0af1f4"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#adf77ab9b0f117367883988ee5f0af1f4">mbedtls_md_finish</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx, unsigned char *output)</td></tr>
<tr class="memdesc:adf77ab9b0f117367883988ee5f0af1f4"><td class="mdescLeft"> </td><td class="mdescRight">Generic message digest final digest Called after <a class="el" href="md_8h.html#a7e50ce3a8c75b5221d07be657b93ca94" title="Generic message digest process buffer Called between mbedtls_md_starts() and mbedtls_md_finish(). ">mbedtls_md_update()</a>. <a href="#adf77ab9b0f117367883988ee5f0af1f4">More...</a><br /></td></tr>
<tr class="separator:adf77ab9b0f117367883988ee5f0af1f4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a36c5d8bda1905e0434708f0ef5912dda"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a36c5d8bda1905e0434708f0ef5912dda">mbedtls_md</a> (const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> *md_info, const unsigned char *input, size_t ilen, unsigned char *output)</td></tr>
<tr class="memdesc:a36c5d8bda1905e0434708f0ef5912dda"><td class="mdescLeft"> </td><td class="mdescRight">Output = message_digest( input buffer ) <a href="#a36c5d8bda1905e0434708f0ef5912dda">More...</a><br /></td></tr>
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<tr class="memitem:a8968f8659fc277f013374c1bac8d4d1a"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a8968f8659fc277f013374c1bac8d4d1a">mbedtls_md_hmac_starts</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx, const unsigned char *key, size_t keylen)</td></tr>
<tr class="memdesc:a8968f8659fc277f013374c1bac8d4d1a"><td class="mdescLeft"> </td><td class="mdescRight">Set HMAC key and prepare to authenticate a new message. <a href="#a8968f8659fc277f013374c1bac8d4d1a">More...</a><br /></td></tr>
<tr class="separator:a8968f8659fc277f013374c1bac8d4d1a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a86cbea1c3bcd558a7e185ff8200a29a6"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a86cbea1c3bcd558a7e185ff8200a29a6">mbedtls_md_hmac_update</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx, const unsigned char *input, size_t ilen)</td></tr>
<tr class="memdesc:a86cbea1c3bcd558a7e185ff8200a29a6"><td class="mdescLeft"> </td><td class="mdescRight">Generic HMAC process buffer. <a href="#a86cbea1c3bcd558a7e185ff8200a29a6">More...</a><br /></td></tr>
<tr class="separator:a86cbea1c3bcd558a7e185ff8200a29a6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7aeafef80c89e47ee3033035a6a75a27"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a7aeafef80c89e47ee3033035a6a75a27">mbedtls_md_hmac_finish</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx, unsigned char *output)</td></tr>
<tr class="memdesc:a7aeafef80c89e47ee3033035a6a75a27"><td class="mdescLeft"> </td><td class="mdescRight">Output HMAC. <a href="#a7aeafef80c89e47ee3033035a6a75a27">More...</a><br /></td></tr>
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<tr class="memitem:a3a5c64b5bda0f294e917ccd5a8ca234e"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a3a5c64b5bda0f294e917ccd5a8ca234e">mbedtls_md_hmac_reset</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx)</td></tr>
<tr class="memdesc:a3a5c64b5bda0f294e917ccd5a8ca234e"><td class="mdescLeft"> </td><td class="mdescRight">Prepare to authenticate a new message with the same key. <a href="#a3a5c64b5bda0f294e917ccd5a8ca234e">More...</a><br /></td></tr>
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<tr class="memitem:a2eefd37cdf52a1fcc04f8545fe890d10"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#a2eefd37cdf52a1fcc04f8545fe890d10">mbedtls_md_hmac</a> (const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> *md_info, const unsigned char *key, size_t keylen, const unsigned char *input, size_t ilen, unsigned char *output)</td></tr>
<tr class="memdesc:a2eefd37cdf52a1fcc04f8545fe890d10"><td class="mdescLeft"> </td><td class="mdescRight">Output = Generic_HMAC( hmac key, input buffer ) <a href="#a2eefd37cdf52a1fcc04f8545fe890d10">More...</a><br /></td></tr>
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<tr class="memitem:ab827b7d1ef7ee631861c7edd33c7b570"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="md_8h.html#ab827b7d1ef7ee631861c7edd33c7b570">mbedtls_md_process</a> (<a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> *ctx, const unsigned char *data)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Generic message digest wrapper. </p>
<dl class="section author"><dt>Author</dt><dd>Adriaan de Jong <a href="#" onclick="location.href='mai'+'lto:'+'dej'+'on'+'g@f'+'ox'+'-it'+'.c'+'om'; return false;">dejon<span style="display: none;">.nosp@m.</span>g@fo<span style="display: none;">.nosp@m.</span>x-it.<span style="display: none;">.nosp@m.</span>com</a></dd></dl>
<p>Copyright (C) 2006-2015, ARM Limited, All Rights Reserved SPDX-License-Identifier: Apache-2.0</p>
<p>Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at</p>
<p><a href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a></p>
<p>Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.</p>
<p>This file is part of mbed TLS (<a href="https://tls.mbed.org">https://tls.mbed.org</a>) </p>
<p class="definition">Definition in file <a class="el" href="md_8h_source.html">md.h</a>.</p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a id="aa9f53b232ef244efb301233d111930dc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa9f53b232ef244efb301233d111930dc">◆ </a></span>MBEDTLS_DEPRECATED</h2>
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<td class="memname">#define MBEDTLS_DEPRECATED</td>
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<p class="definition">Definition at line <a class="el" href="md_8h_source.html#l00125">125</a> of file <a class="el" href="md_8h_source.html">md.h</a>.</p>
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<a id="a7e7a4f1a618afbb412ef82ca2e572140"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7e7a4f1a618afbb412ef82ca2e572140">◆ </a></span>MBEDTLS_ERR_MD_ALLOC_FAILED</h2>
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<td class="memname">#define MBEDTLS_ERR_MD_ALLOC_FAILED   -0x5180</td>
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<p>Failed to allocate memory. </p>
<p class="definition">Definition at line <a class="el" href="md_8h_source.html#l00032">32</a> of file <a class="el" href="md_8h_source.html">md.h</a>.</p>
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<a id="aeeb355bf3d3d39a2a6ba50544139b9a7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aeeb355bf3d3d39a2a6ba50544139b9a7">◆ </a></span>MBEDTLS_ERR_MD_BAD_INPUT_DATA</h2>
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<td class="memname">#define MBEDTLS_ERR_MD_BAD_INPUT_DATA   -0x5100</td>
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<p>Bad input parameters to function. </p>
<p class="definition">Definition at line <a class="el" href="md_8h_source.html#l00031">31</a> of file <a class="el" href="md_8h_source.html">md.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a121b228f0512def159e3bd4ced07633b">◆ </a></span>MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE</h2>
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<td class="memname">#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE   -0x5080</td>
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<p>The selected feature is not available. </p>
<p class="definition">Definition at line <a class="el" href="md_8h_source.html#l00030">30</a> of file <a class="el" href="md_8h_source.html">md.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#aab0a160e4b0efdd4cc8cbe12b4813047">◆ </a></span>MBEDTLS_ERR_MD_FILE_IO_ERROR</h2>
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<td class="memname">#define MBEDTLS_ERR_MD_FILE_IO_ERROR   -0x5200</td>
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<p>Opening or reading of file failed. </p>
<p class="definition">Definition at line <a class="el" href="md_8h_source.html#l00033">33</a> of file <a class="el" href="md_8h_source.html">md.h</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad3e0e65cb5b289a358b83b5af1fdd41b">◆ </a></span>MBEDTLS_MD_MAX_SIZE</h2>
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<td class="memname">#define MBEDTLS_MD_MAX_SIZE   32 /* longest known is SHA256 or less */</td>
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<p class="definition">Definition at line <a class="el" href="md_8h_source.html#l00055">55</a> of file <a class="el" href="md_8h_source.html">md.h</a>.</p>
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<h2 class="groupheader">Typedef Documentation</h2>
<a id="a496e73a6f229eba89b4abd9955822adb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a496e73a6f229eba89b4abd9955822adb">◆ </a></span>mbedtls_md_info_t</h2>
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<td class="memname">typedef struct <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a></td>
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<p>Opaque struct defined in md_internal.h. </p>
<p class="definition">Definition at line <a class="el" href="md_8h_source.html#l00061">61</a> of file <a class="el" href="md_8h_source.html">md.h</a>.</p>
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<h2 class="groupheader">Enumeration Type Documentation</h2>
<a id="a219313cb40503ec3e34a857ab98b2296"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a219313cb40503ec3e34a857ab98b2296">◆ </a></span>mbedtls_md_type_t</h2>
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<td class="memname">enum <a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296">mbedtls_md_type_t</a></td>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296a564288006d735f75738021342ca5f9d1"></a>MBEDTLS_MD_NONE </td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296af765a736e226d2832625c3267c8c2472"></a>MBEDTLS_MD_MD2 </td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296a8f31ceaa511350d5da8393a7ce4a5704"></a>MBEDTLS_MD_MD4 </td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296a14fbb8d456ae15f082c2360200cd50bf"></a>MBEDTLS_MD_MD5 </td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296a800a5ff57003d84ac73f1aadeaaf00fe"></a>MBEDTLS_MD_SHA1 </td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296a77e7fbd0fa5e31e7e1c9295928568f74"></a>MBEDTLS_MD_SHA224 </td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296a7634aa1a264b0e1a5ec65f4ed77468f8"></a>MBEDTLS_MD_SHA256 </td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296a39dd5c95e28fac45c3f18e55b11329cb"></a>MBEDTLS_MD_SHA384 </td><td class="fielddoc"></td></tr>
<tr><td class="fieldname"><a id="a219313cb40503ec3e34a857ab98b2296a0cdbe8272ceee7d63b2bfadd5ed05c26"></a>MBEDTLS_MD_SHA512 </td><td class="fielddoc"></td></tr>
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<p class="definition">Definition at line <a class="el" href="md_8h_source.html#l00039">39</a> of file <a class="el" href="md_8h_source.html">md.h</a>.</p>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a36c5d8bda1905e0434708f0ef5912dda">◆ </a></span>mbedtls_md()</h2>
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<td class="memname">int mbedtls_md </td>
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<td class="paramtype">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td>
<td class="paramname"><em>md_info</em>, </td>
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<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
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<td class="paramtype">unsigned char * </td>
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<p>Output = message_digest( input buffer ) </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">md_info</td><td>message digest info </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the data </td></tr>
<tr><td class="paramname">ilen</td><td>length of the input data </td></tr>
<tr><td class="paramname">output</td><td>Generic message digest checksum result</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a5140622773fa71bbe87ca521e57ff8c2">◆ </a></span>mbedtls_md_clone()</h2>
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<td class="memname">int mbedtls_md_clone </td>
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<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>dst</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>src</em> </td>
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<p>Clone the state of an MD context. </p>
<dl class="section note"><dt>Note</dt><dd>The two contexts must have been setup to the same type (cloning from SHA-256 to SHA-512 make no sense).</dd></dl>
<dl class="section warning"><dt>Warning</dt><dd>Only clones the MD state, not the HMAC state! (for now)</dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">dst</td><td>The destination context </td></tr>
<tr><td class="paramname">src</td><td>The context to be cloned</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>0</code> on success, <code>MBEDTLS_ERR_MD_BAD_INPUT_DATA</code> on parameter failure. </dd></dl>
</div>
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<a id="adf77ab9b0f117367883988ee5f0af1f4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#adf77ab9b0f117367883988ee5f0af1f4">◆ </a></span>mbedtls_md_finish()</h2>
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<td class="memname">int mbedtls_md_finish </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramtype">unsigned char * </td>
<td class="paramname"><em>output</em> </td>
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<p>Generic message digest final digest Called after <a class="el" href="md_8h.html#a7e50ce3a8c75b5221d07be657b93ca94" title="Generic message digest process buffer Called between mbedtls_md_starts() and mbedtls_md_finish(). ">mbedtls_md_update()</a>. </p>
<p>Usually followed by <a class="el" href="md_8h.html#af3248ddb6ad05035292fa92ac4af2587" title="Free and clear the internal structures of ctx. ">mbedtls_md_free()</a> or <a class="el" href="md_8h.html#a24483eff556810e3489ac6abefa328e6" title="Prepare the context to digest a new message. ">mbedtls_md_starts()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>Generic message digest context </td></tr>
<tr><td class="paramname">output</td><td>Generic message digest checksum result</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
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</div>
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<h2 class="memtitle"><span class="permalink"><a href="#af3248ddb6ad05035292fa92ac4af2587">◆ </a></span>mbedtls_md_free()</h2>
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<td class="memname">void mbedtls_md_free </td>
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<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
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<p>Free and clear the internal structures of ctx. </p>
<p>Can be called at any time after <a class="el" href="md_8h.html#ad8b02927ca10552e3cbf293fa8c10e24" title="Initialize a md_context (as NONE) This should always be called first. ">mbedtls_md_init()</a>. Mandatory once <a class="el" href="md_8h.html#a1b858111212997b90bd7d2c71010a7ec" title="Select MD to use and allocate internal structures. ">mbedtls_md_setup()</a> has been called. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a3ceb9e6b3d4b21612ef5d7532872c6bc">◆ </a></span>mbedtls_md_get_name()</h2>
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<td class="memname">const char* mbedtls_md_get_name </td>
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<td class="paramtype">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td>
<td class="paramname"><em>md_info</em></td><td>)</td>
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<p>Returns the name of the message digest output. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">md_info</td><td>message digest info</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>name of the message digest output. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ae20f4ddcf2bbf2e59cafc6fab8c993d6">◆ </a></span>mbedtls_md_get_size()</h2>
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<td class="memname">unsigned char mbedtls_md_get_size </td>
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<td class="paramtype">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td>
<td class="paramname"><em>md_info</em></td><td>)</td>
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<p>Returns the size of the message digest output. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">md_info</td><td>message digest info</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>size of the message digest output in bytes. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a7a084e1b71c78daa7071691f60de5131">◆ </a></span>mbedtls_md_get_type()</h2>
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<td class="memname"><a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296">mbedtls_md_type_t</a> mbedtls_md_get_type </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td>
<td class="paramname"><em>md_info</em></td><td>)</td>
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<p>Returns the type of the message digest output. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">md_info</td><td>message digest info</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>type of the message digest output. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a2eefd37cdf52a1fcc04f8545fe890d10">◆ </a></span>mbedtls_md_hmac()</h2>
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<td class="memname">int mbedtls_md_hmac </td>
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<td class="paramtype">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td>
<td class="paramname"><em>md_info</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>key</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>keylen</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>ilen</em>, </td>
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<td></td>
<td class="paramtype">unsigned char * </td>
<td class="paramname"><em>output</em> </td>
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<p>Output = Generic_HMAC( hmac key, input buffer ) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">md_info</td><td>message digest info </td></tr>
<tr><td class="paramname">key</td><td>HMAC secret key </td></tr>
<tr><td class="paramname">keylen</td><td>length of the HMAC key in bytes </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the data </td></tr>
<tr><td class="paramname">ilen</td><td>length of the input data </td></tr>
<tr><td class="paramname">output</td><td>Generic HMAC-result</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a7aeafef80c89e47ee3033035a6a75a27">◆ </a></span>mbedtls_md_hmac_finish()</h2>
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<td class="memname">int mbedtls_md_hmac_finish </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char * </td>
<td class="paramname"><em>output</em> </td>
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<p>Output HMAC. </p>
<p>Called after <a class="el" href="md_8h.html#a86cbea1c3bcd558a7e185ff8200a29a6" title="Generic HMAC process buffer. ">mbedtls_md_hmac_update()</a>. Usually followed by <a class="el" href="md_8h.html#a3a5c64b5bda0f294e917ccd5a8ca234e" title="Prepare to authenticate a new message with the same key. ">mbedtls_md_hmac_reset()</a>, <a class="el" href="md_8h.html#a8968f8659fc277f013374c1bac8d4d1a" title="Set HMAC key and prepare to authenticate a new message. ">mbedtls_md_hmac_starts()</a>, or <a class="el" href="md_8h.html#af3248ddb6ad05035292fa92ac4af2587" title="Free and clear the internal structures of ctx. ">mbedtls_md_free()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>HMAC context </td></tr>
<tr><td class="paramname">output</td><td>Generic HMAC checksum result</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
</div>
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<a id="a3a5c64b5bda0f294e917ccd5a8ca234e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a3a5c64b5bda0f294e917ccd5a8ca234e">◆ </a></span>mbedtls_md_hmac_reset()</h2>
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<td class="memname">int mbedtls_md_hmac_reset </td>
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<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
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<p>Prepare to authenticate a new message with the same key. </p>
<p>Called after <a class="el" href="md_8h.html#a7aeafef80c89e47ee3033035a6a75a27" title="Output HMAC. ">mbedtls_md_hmac_finish()</a> and before <a class="el" href="md_8h.html#a86cbea1c3bcd558a7e185ff8200a29a6" title="Generic HMAC process buffer. ">mbedtls_md_hmac_update()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>HMAC context to be reset</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a8968f8659fc277f013374c1bac8d4d1a">◆ </a></span>mbedtls_md_hmac_starts()</h2>
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<td class="memname">int mbedtls_md_hmac_starts </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>key</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">size_t </td>
<td class="paramname"><em>keylen</em> </td>
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<p>Set HMAC key and prepare to authenticate a new message. </p>
<p>Usually called after <a class="el" href="md_8h.html#a1b858111212997b90bd7d2c71010a7ec" title="Select MD to use and allocate internal structures. ">mbedtls_md_setup()</a> or <a class="el" href="md_8h.html#a7aeafef80c89e47ee3033035a6a75a27" title="Output HMAC. ">mbedtls_md_hmac_finish()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>HMAC context </td></tr>
<tr><td class="paramname">key</td><td>HMAC secret key </td></tr>
<tr><td class="paramname">keylen</td><td>length of the HMAC key in bytes</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a86cbea1c3bcd558a7e185ff8200a29a6">◆ </a></span>mbedtls_md_hmac_update()</h2>
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<td class="memname">int mbedtls_md_hmac_update </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
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<td class="paramtype">size_t </td>
<td class="paramname"><em>ilen</em> </td>
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<p>Generic HMAC process buffer. </p>
<p>Called between <a class="el" href="md_8h.html#a8968f8659fc277f013374c1bac8d4d1a" title="Set HMAC key and prepare to authenticate a new message. ">mbedtls_md_hmac_starts()</a> or <a class="el" href="md_8h.html#a3a5c64b5bda0f294e917ccd5a8ca234e" title="Prepare to authenticate a new message with the same key. ">mbedtls_md_hmac_reset()</a> and <a class="el" href="md_8h.html#a7aeafef80c89e47ee3033035a6a75a27" title="Output HMAC. ">mbedtls_md_hmac_finish()</a>. May be called repeatedly.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>HMAC context </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the data </td></tr>
<tr><td class="paramname">ilen</td><td>length of the input data</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ac4619cce171e558d059baae35da50a2a">◆ </a></span>mbedtls_md_info_from_string()</h2>
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<td class="memname">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a>* mbedtls_md_info_from_string </td>
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<p>Returns the message digest information associated with the given digest name. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">md_name</td><td>Name of the digest to search for.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The message digest information associated with md_name or NULL if not found. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#aca53b51e0c8eb0e07c7eb4a3e6acfa0d">◆ </a></span>mbedtls_md_info_from_type()</h2>
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<td class="memname">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a>* mbedtls_md_info_from_type </td>
<td>(</td>
<td class="paramtype"><a class="el" href="md_8h.html#a219313cb40503ec3e34a857ab98b2296">mbedtls_md_type_t</a> </td>
<td class="paramname"><em>md_type</em></td><td>)</td>
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<p>Returns the message digest information associated with the given digest type. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">md_type</td><td>type of digest to search for.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The message digest information associated with md_type or NULL if not found. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ad8b02927ca10552e3cbf293fa8c10e24">◆ </a></span>mbedtls_md_init()</h2>
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<td class="memname">void mbedtls_md_init </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
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<p>Initialize a md_context (as NONE) This should always be called first. </p>
<p>Prepares the context for <a class="el" href="md_8h.html#a1b858111212997b90bd7d2c71010a7ec" title="Select MD to use and allocate internal structures. ">mbedtls_md_setup()</a> or <a class="el" href="md_8h.html#af3248ddb6ad05035292fa92ac4af2587" title="Free and clear the internal structures of ctx. ">mbedtls_md_free()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a40d6e9a8c2ee4d9c24782d4dd6fc7c36">◆ </a></span>mbedtls_md_init_ctx()</h2>
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<td class="memname">int mbedtls_md_init_ctx </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramtype">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td>
<td class="paramname"><em>md_info</em> </td>
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<p>Select MD to use and allocate internal structures. </p>
<p>Should be called after <a class="el" href="md_8h.html#ad8b02927ca10552e3cbf293fa8c10e24" title="Initialize a md_context (as NONE) This should always be called first. ">mbedtls_md_init()</a> or <a class="el" href="md_8h.html#af3248ddb6ad05035292fa92ac4af2587" title="Free and clear the internal structures of ctx. ">mbedtls_md_free()</a>. Makes it necessary to call <a class="el" href="md_8h.html#af3248ddb6ad05035292fa92ac4af2587" title="Free and clear the internal structures of ctx. ">mbedtls_md_free()</a> later.</p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000005">Deprecated:</a></b></dt><dd>Superseded by <a class="el" href="md_8h.html#a1b858111212997b90bd7d2c71010a7ec" title="Select MD to use and allocate internal structures. ">mbedtls_md_setup()</a> in 2.0.0</dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>Context to set up. </td></tr>
<tr><td class="paramname">md_info</td><td>Message digest to use.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>0</code> on success, <code>MBEDTLS_ERR_MD_BAD_INPUT_DATA</code> on parameter failure, <code>MBEDTLS_ERR_MD_ALLOC_FAILED</code> memory allocation failure. </dd></dl>
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<a id="a51dc7cc39a5bf5b894cc1616bf798c06"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a51dc7cc39a5bf5b894cc1616bf798c06">◆ </a></span>mbedtls_md_list()</h2>
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<td class="memname">const int* mbedtls_md_list </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
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<p>Returns the list of digests supported by the generic digest module. </p>
<dl class="section return"><dt>Returns</dt><dd>a statically allocated array of digests, the last entry is 0. </dd></dl>
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<a id="ab827b7d1ef7ee631861c7edd33c7b570"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab827b7d1ef7ee631861c7edd33c7b570">◆ </a></span>mbedtls_md_process()</h2>
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<td class="memname">int mbedtls_md_process </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>data</em> </td>
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<td>)</td>
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</div>
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<a id="a1b858111212997b90bd7d2c71010a7ec"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a1b858111212997b90bd7d2c71010a7ec">◆ </a></span>mbedtls_md_setup()</h2>
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<td class="memname">int mbedtls_md_setup </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="md_8h.html#a496e73a6f229eba89b4abd9955822adb">mbedtls_md_info_t</a> * </td>
<td class="paramname"><em>md_info</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>hmac</em> </td>
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<p>Select MD to use and allocate internal structures. </p>
<p>Should be called after <a class="el" href="md_8h.html#ad8b02927ca10552e3cbf293fa8c10e24" title="Initialize a md_context (as NONE) This should always be called first. ">mbedtls_md_init()</a> or <a class="el" href="md_8h.html#af3248ddb6ad05035292fa92ac4af2587" title="Free and clear the internal structures of ctx. ">mbedtls_md_free()</a>. Makes it necessary to call <a class="el" href="md_8h.html#af3248ddb6ad05035292fa92ac4af2587" title="Free and clear the internal structures of ctx. ">mbedtls_md_free()</a> later.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>Context to set up. </td></tr>
<tr><td class="paramname">md_info</td><td>Message digest to use. </td></tr>
<tr><td class="paramname">hmac</td><td>0 to save some memory if HMAC will not be used, non-zero is HMAC is going to be used with this context.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>0</code> on success, <code>MBEDTLS_ERR_MD_BAD_INPUT_DATA</code> on parameter failure, <code>MBEDTLS_ERR_MD_ALLOC_FAILED</code> memory allocation failure. </dd></dl>
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<a id="a24483eff556810e3489ac6abefa328e6"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a24483eff556810e3489ac6abefa328e6">◆ </a></span>mbedtls_md_starts()</h2>
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<td class="memname">int mbedtls_md_starts </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
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<p>Prepare the context to digest a new message. </p>
<p>Generally called after <a class="el" href="md_8h.html#a1b858111212997b90bd7d2c71010a7ec" title="Select MD to use and allocate internal structures. ">mbedtls_md_setup()</a> or <a class="el" href="md_8h.html#adf77ab9b0f117367883988ee5f0af1f4" title="Generic message digest final digest Called after mbedtls_md_update(). ">mbedtls_md_finish()</a>. Followed by <a class="el" href="md_8h.html#a7e50ce3a8c75b5221d07be657b93ca94" title="Generic message digest process buffer Called between mbedtls_md_starts() and mbedtls_md_finish(). ">mbedtls_md_update()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>generic message digest context.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
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<a id="a7e50ce3a8c75b5221d07be657b93ca94"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7e50ce3a8c75b5221d07be657b93ca94">◆ </a></span>mbedtls_md_update()</h2>
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<td class="memname">int mbedtls_md_update </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structmbedtls__md__context__t.html">mbedtls_md_context_t</a> * </td>
<td class="paramname"><em>ctx</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>input</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>ilen</em> </td>
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<td></td>
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<p>Generic message digest process buffer Called between <a class="el" href="md_8h.html#a24483eff556810e3489ac6abefa328e6" title="Prepare the context to digest a new message. ">mbedtls_md_starts()</a> and <a class="el" href="md_8h.html#adf77ab9b0f117367883988ee5f0af1f4" title="Generic message digest final digest Called after mbedtls_md_update(). ">mbedtls_md_finish()</a>. </p>
<p>May be called repeatedly.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ctx</td><td>Generic message digest context </td></tr>
<tr><td class="paramname">input</td><td>buffer holding the datal </td></tr>
<tr><td class="paramname">ilen</td><td>length of the input data</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter verification fails. </dd></dl>
</div>
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