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1 /* |
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2 * hash.cpp -- hash functions |
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3 * |
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4 * Copyright (c) 2013-2015 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #include "hash.h" |
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20 |
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21 #include <openssl/sha.h> |
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22 #include <openssl/md5.h> |
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23 |
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24 namespace hash { |
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25 |
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26 namespace { |
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27 |
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28 template <typename Context> |
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29 using Init = int (*)(Context *); |
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30 |
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31 template <typename Context> |
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32 using Update = int (*)(Context *, const void *, size_t); |
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33 |
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34 template <typename Context> |
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35 using Final = int (*)(unsigned char *, Context *); |
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36 |
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37 template <typename Context, size_t Length> |
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38 std::string convert(const std::string &input, Init<Context> init, Update<Context> update, Final<Context> finalize) |
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39 { |
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40 unsigned char digest[Length]; |
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41 char hash[Length * 2 + 1]; |
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42 |
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43 Context ctx; |
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44 init(&ctx); |
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45 update(&ctx, input.c_str(), input.length()); |
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46 finalize(digest, &ctx); |
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47 |
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48 for (unsigned long i = 0; i < Length; i++) |
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49 sprintf(&hash[i * 2], "%02x", (unsigned int)digest[i]); |
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50 |
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51 return std::string(hash); |
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52 } |
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53 |
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54 } // !namespace |
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55 |
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56 std::string md5(const std::string &input) |
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57 { |
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58 return convert<MD5_CTX, MD5_DIGEST_LENGTH>(input, MD5_Init, MD5_Update, MD5_Final); |
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59 } |
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60 |
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61 std::string sha1(const std::string &input) |
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62 { |
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63 return convert<SHA_CTX, SHA_DIGEST_LENGTH>(input, SHA1_Init, SHA1_Update, SHA1_Final); |
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64 } |
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65 |
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66 std::string sha256(const std::string &input) |
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67 { |
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68 return convert<SHA256_CTX, SHA256_DIGEST_LENGTH>(input, SHA256_Init, SHA256_Update, SHA256_Final); |
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69 } |
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70 |
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71 std::string sha512(const std::string &input) |
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72 { |
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73 return convert<SHA512_CTX, SHA512_DIGEST_LENGTH>(input, SHA512_Init, SHA512_Update, SHA512_Final); |
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74 } |
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75 |
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76 } // !hash |
