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add zmq_curve_keypair to zmq_utils

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This commit is contained in:
MinRK 2013-09-29 13:02:39 -07:00
parent 30d34888e0
commit d1a927a92e
2 changed files with 40 additions and 1 deletions
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4
include/zmq_utils.h
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@ -88,6 +88,10 @@ ZMQ_EXPORT char *zmq_z85_encode (char *dest, uint8_t *data, size_t size);
/* Decode data with Z85 encoding. Returns decoded data */
ZMQ_EXPORT uint8_t *zmq_z85_decode (uint8_t *dest, char *string);
/* Generate z85-encoded public and private keypair with libsodium. */
/* Returns 0 on success. */
ZMQ_EXPORT int zmq_curve_keypair (char* z85_public_key, char *z85_secret_key);
#undef ZMQ_EXPORT
#ifdef __cplusplus

37
src/zmq_utils.cpp
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@ -30,6 +30,10 @@
#else
#include "windows.hpp"
#endif
#ifdef HAVE_LIBSODIUM
# include <sodium.h>
#endif
void zmq_sleep (int seconds_)
{
@ -125,7 +129,7 @@ char *zmq_z85_encode (char *dest, uint8_t *data, size_t size)
return dest;
}
// --------------------------------------------------------------------------
// Decode an encoded string into a binary frame; dest must be at least
// strlen (string) * 4 / 5 bytes long. Returns dest. strlen (string)
@ -153,3 +157,34 @@ uint8_t *zmq_z85_decode (uint8_t *dest, char *string)
assert (byte_nbr == strlen (string) * 4 / 5);
return dest;
}
// --------------------------------------------------------------------------
// Generate a public/private keypair with libsodium.
// Generated keys will be 40 byte z85-encoded strings.
// Returns 0 on success, -1 on failure, setting errno.
// Sets errno = ENOTSUP in the absence of libsodium.
int zmq_curve_keypair (char* z85_public_key, char *z85_secret_key)
{
#ifdef HAVE_LIBSODIUM
# if crypto_box_PUBLICKEYBYTES != 32 \
|| crypto_box_SECRETKEYBYTES != 32
# error "libsodium not built correctly"
# endif
uint8_t public_key [32];
uint8_t secret_key [32];
int rc = crypto_box_keypair (public_key, secret_key);
// is there a sensible errno to set here?
if (rc) return rc;
zmq_z85_encode (z85_public_key, public_key, 32);
zmq_z85_encode (z85_secret_key, secret_key, 32);
return 0;
#else // requires libsodium
errno = ENOTSUP;
return -1;
#endif
}