diff options
Diffstat (limited to 'nacl/crypto_secretbox/wrapper-box.cpp')
-rw-r--r-- | nacl/crypto_secretbox/wrapper-box.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/nacl/crypto_secretbox/wrapper-box.cpp b/nacl/crypto_secretbox/wrapper-box.cpp new file mode 100644 index 00000000..fb8b1784 --- /dev/null +++ b/nacl/crypto_secretbox/wrapper-box.cpp | |||
@@ -0,0 +1,19 @@ | |||
1 | #include <string> | ||
2 | using std::string; | ||
3 | #include "crypto_secretbox.h" | ||
4 | |||
5 | string crypto_secretbox(const string &m,const string &n,const string &k) | ||
6 | { | ||
7 | if (k.size() != crypto_secretbox_KEYBYTES) throw "incorrect key length"; | ||
8 | if (n.size() != crypto_secretbox_NONCEBYTES) throw "incorrect nonce length"; | ||
9 | size_t mlen = m.size() + crypto_secretbox_ZEROBYTES; | ||
10 | unsigned char mpad[mlen]; | ||
11 | for (int i = 0;i < crypto_secretbox_ZEROBYTES;++i) mpad[i] = 0; | ||
12 | for (int i = crypto_secretbox_ZEROBYTES;i < mlen;++i) mpad[i] = m[i - crypto_secretbox_ZEROBYTES]; | ||
13 | unsigned char cpad[mlen]; | ||
14 | crypto_secretbox(cpad,mpad,mlen,(const unsigned char *) n.c_str(),(const unsigned char *) k.c_str()); | ||
15 | return string( | ||
16 | (char *) cpad + crypto_secretbox_BOXZEROBYTES, | ||
17 | mlen - crypto_secretbox_BOXZEROBYTES | ||
18 | ); | ||
19 | } | ||