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add __openssl_compute_key to calc the shared key

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This commit is contained in:
winlin 2014-08-08 11:34:17 +08:00
parent 7adbe7f456
commit d4c2aa1e8e
2 changed files with 33 additions and 0 deletions
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2
trunk/src/kernel/srs_kernel_error.hpp
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@ -129,6 +129,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#define ERROR_OpenSslSha256Final 2035
#define ERROR_OpenSslSha256EvpDigest 2036
#define ERROR_OpenSslSha256DigestSize 2037
#define ERROR_OpenSslGetPeerPublicKey 2038
#define ERROR_OpenSslComputeSharedKey 2039
//
// system control message,
// not an error, but special control logic.

31
trunk/src/rtmp/srs_protocol_handshake.cpp
View file

@ -202,6 +202,37 @@ namespace _srs_internal
return ret;
}
int __openssl_compute_key(DH* pdh, const char* peer_pub_key, int ppk_size, char* secret)
{
int ret = ERROR_SUCCESS;
int32_t bits_count = 1024;
// 2. generate the g, p, private/public key.
if ((ret = __openssl_initialize_dh(pdh, bits_count)) != ERROR_SUCCESS) {
return ret;
}
// copy public key to bytes.
srs_assert(BN_num_bytes(pdh->pub_key) == ppk_size);
BIGNUM* ppk = NULL;
if ((ppk = BN_bin2bn((const unsigned char*)peer_pub_key, ppk_size, 0)) == NULL) {
ret = ERROR_OpenSslGetPeerPublicKey;
return ret;
}
// if failed, donot return, do cleanup.
if (DH_compute_key((unsigned char*)secret, ppk, pdh) < 0) {
ret = ERROR_OpenSslComputeSharedKey;
}
if (ppk) {
BN_free(ppk);
}
return ret;
}
void __openssl_free(DH* pdh)
{
if (pdh != NULL) {