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) throw (std::invalid_argument)
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 EVP_DigestInit_ex(&mdctx, md, NULL);
48 // Test if data is empty.
50 throw std::invalid_argument("Passed data is empty");
52 // Hash the data. At this point data is not empty and &mdctx is initialized.
53 EVP_DigestUpdate(&mdctx, data.c_str(), data.size());
55 // Retrieve the digest value from &mdctx and place it in md_value.
56 EVP_DigestFinal_ex(&mdctx, md_value, &md_len);
58 // Test if md_value is filled correctly and md_len is not zero.
59 if ( (md_len == 0) || (md_value == NULL) || (EVP_MD_CTX_size(&mdctx) == 0) )
60 throw std::invalid_argument("Retrieved invalid digest value");
62 // Internal cleanup of the digest content.
63 EVP_MD_CTX_cleanup(&mdctx);
66 // Convert md5 digest C string to hex.
67 std::ostringstream oss_digest_md5_hex;
68 for(unsigned int i = 0; i < md_len; ++i)
70 // We have to do a static cast to an decimal representation, cause otherwise ostringstream would interpret
71 // the stream as a character and output the character representation of the hex value.
72 oss_digest_md5_hex << std::hex << static_cast<unsigned short>(md_value[i]);
75 return oss_digest_md5_hex.str();
80 * Get the status code from the given data.
81 * @param data The data containing the status code at front, limited by " ".
82 * @return The parsed status code.
84 std::string parse_status_code(std::string data)
86 std::list<std::string> tokens;
87 boost::algorithm::split(tokens,data,boost::is_any_of(" "));
88 return tokens.front();