2 * @brief Util namespace header.
6 * @copyright Intra2net AG
13 #include <openssl/evp.h>
14 #include <boost/algorithm/string.hpp>
19 * Computes a MD5 Digest from the given string and returns the HEX representation
20 * @param data The string to compute the md5 for
21 * @return The computed md5 in hex
23 std::string compute_md5_digest(std::string data)
25 // compute an MD5 digest.
29 unsigned char md_value[EVP_MAX_MD_SIZE];
30 unsigned int md_len = 0;
32 // Add all digest algorithms to the internal table.
33 OpenSSL_add_all_digests();
35 // Get the md5 digest algorithm from the internal table.
36 md = EVP_get_digestbyname("md5");
38 // Test if md is initialized.
39 if ( (md == NULL) || (EVP_MD_size(md) == 0) )
40 throw std::invalid_argument("NULL pointer: md");
42 // Initalize digest content mdctx.
43 EVP_MD_CTX_init(&mdctx);
45 // Now we can call init_ex.
46 if ( EVP_DigestInit_ex(&mdctx, md, NULL) == 0 )
48 EVP_MD_CTX_cleanup(&mdctx); /*lint !e534 */
49 EVP_cleanup(); /*lint !e534 */
50 throw std::invalid_argument("Could not set up digest context correctly");
53 // Test if data is empty.
56 EVP_MD_CTX_cleanup(&mdctx); /*lint !e534 */
57 EVP_cleanup(); /*lint !e534 */
58 throw std::invalid_argument("Passed data is empty");
61 // Hash the data. At this point data is not empty and &mdctx is initialized.
62 if ( EVP_DigestUpdate(&mdctx, data.c_str(), data.size()) == 0 )
64 EVP_MD_CTX_cleanup(&mdctx); /*lint !e534 */
65 EVP_cleanup(); /*lint !e534 */
66 throw std::invalid_argument("Could not hash data into digest context");
69 // Retrieve the digest value from &mdctx and place it in md_value.
70 if ( EVP_DigestFinal_ex(&mdctx, md_value, &md_len) == 0 )
72 EVP_MD_CTX_cleanup(&mdctx); /*lint !e534 */
73 EVP_cleanup(); /*lint !e534 */
74 throw std::invalid_argument("Could not retrieve digest value");
77 // Test if md_value is filled correctly and md_len is not zero.
78 if ( (md_len == 0) || (EVP_MD_CTX_size(&mdctx) == 0) )
80 EVP_MD_CTX_cleanup(&mdctx); /*lint !e534 */
81 EVP_cleanup(); /*lint !e534 */
82 throw std::invalid_argument("Retrieved invalid digest value");
85 // Internal cleanup of the digest content.
86 EVP_MD_CTX_cleanup(&mdctx); /*lint !e534 */
87 EVP_cleanup(); /*lint !e534 */
89 // Convert md5 digest C string to hex.
90 std::ostringstream oss_digest_md5_hex;
91 for(unsigned int i = 0; i < md_len; ++i)
93 // We have to do a static cast to an decimal representation, cause otherwise ostringstream would interpret
94 // the stream as a character and output the character representation of the hex value.
95 oss_digest_md5_hex << std::hex << static_cast<unsigned short>(md_value[i]);
98 return oss_digest_md5_hex.str();
103 * Get the status code from the given data.
104 * @param data The data containing the status code at front, limited by delimiter.
105 * @param delimiter The delimiter to use.
106 * @return The parsed status code
108 std::string parse_status_code(std::string data, std::string delimiter)
110 std::list<std::string> tokens;
111 boost::algorithm::split(tokens,data,boost::is_any_of(delimiter));
112 if ( tokens.empty() )
114 return tokens.front();