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Diffstat (limited to 'nacl/crypto_sign/wrapper-sign-open.cpp')
-rw-r--r--nacl/crypto_sign/wrapper-sign-open.cpp24
1 files changed, 24 insertions, 0 deletions
diff --git a/nacl/crypto_sign/wrapper-sign-open.cpp b/nacl/crypto_sign/wrapper-sign-open.cpp
new file mode 100644
index 00000000..346e9400
--- /dev/null
+++ b/nacl/crypto_sign/wrapper-sign-open.cpp
@@ -0,0 +1,24 @@
1#include <string>
2using std::string;
3#include "crypto_sign.h"
4
5string crypto_sign_open(const string &sm_string, const string &pk_string)
6{
7 if (pk_string.size() != crypto_sign_PUBLICKEYBYTES) throw "incorrect public-key length";
8 size_t smlen = sm_string.size();
9 unsigned char m[smlen];
10 unsigned long long mlen;
11 for (int i = 0;i < smlen;++i) m[i] = sm_string[i];
12 if (crypto_sign_open(
13 m,
14 &mlen,
15 m,
16 smlen,
17 (const unsigned char *) pk_string.c_str()
18 ) != 0)
19 throw "ciphertext fails verification";
20 return string(
21 (char *) m,
22 mlen
23 );
24}