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fix #165, refine dh wrapper, ensure public key is 128bytes. 0.9.207.

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pull/133/head
winlin 11 years ago
parent cb311d998e
commit 9b6187c3d5
4 changed files with 37 additions and 28 deletions
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2
trunk/src/core/srs_core.hpp
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@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// current release version
#define VERSION_MAJOR "0"
#define VERSION_MINOR "9"
#define VERSION_REVISION "206"
#define VERSION_REVISION "207"
#define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
// server info.
#define RTMP_SIG_SRS_KEY "SRS"

41
trunk/src/rtmp/srs_protocol_handshake.cpp
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@ -190,7 +190,7 @@ namespace _srs_internal
return ret;
}
int SrsDH::copy_public_key(char* pkey, int32_t* ppkey_size)
int SrsDH::copy_public_key(char* pkey, int32_t& pkey_size)
{
int ret = ERROR_SUCCESS;
@ -199,20 +199,21 @@ namespace _srs_internal
int32_t key_size = BN_num_bytes(pdh->pub_key);
srs_assert(key_size > 0);
// maybe the key_size is 127, but dh will write all 128bytes pkey,
// so, donot need to set/initialize the pkey.
// @see https://github.com/winlinvip/simple-rtmp-server/issues/165
key_size = BN_bn2bin(pdh->pub_key, (unsigned char*)pkey);
srs_assert(key_size > 0);
if (ppkey_size != NULL) {
// output the size of public key.
// @see https://github.com/winlinvip/simple-rtmp-server/issues/165
srs_assert(key_size <= *ppkey_size);
*ppkey_size = key_size;
}
// output the size of public key.
// @see https://github.com/winlinvip/simple-rtmp-server/issues/165
srs_assert(key_size <= pkey_size);
pkey_size = key_size;
return ret;
}
int SrsDH::copy_shared_key(const char* ppkey, int32_t ppkey_size, char* skey, int32_t* pskey_size)
int SrsDH::copy_shared_key(const char* ppkey, int32_t ppkey_size, char* skey, int32_t& skey_size)
{
int ret = ERROR_SUCCESS;
@ -223,22 +224,19 @@ namespace _srs_internal
}
// if failed, donot return, do cleanup, @see ./test/dhtest.c:168
// maybe the key_size is 127, but dh will write all 128bytes skey,
// so, donot need to set/initialize the skey.
// @see https://github.com/winlinvip/simple-rtmp-server/issues/165
int32_t key_size = DH_compute_key((unsigned char*)skey, ppk, pdh);
if (key_size < ppkey_size) {
srs_warn("shared key size=%d, ppk_size=%d", key_size, ppkey_size);
}
if (key_size < 0) {
if (key_size < 0 || key_size > skey_size) {
ret = ERROR_OpenSslComputeSharedKey;
} else {
if (pskey_size != NULL) {
if (key_size > *pskey_size) {
ret = ERROR_OpenSslComputeSharedKey;
} else {
*pskey_size = key_size;
}
}
skey_size = key_size;
}
if (ppk) {
@ -936,29 +934,36 @@ namespace _srs_internal
version = 0x01000504; // server s1 version
SrsDH dh;
// ensure generate 128bytes public key.
if ((ret = dh.initialize(true)) != ERROR_SUCCESS) {
return ret;
}
if (schema == srs_schema0) {
srs_key_block_init(&block0.key);
srs_digest_block_init(&block1.digest);
// directly generate the public key.
// @see: https://github.com/winlinvip/simple-rtmp-server/issues/148
if ((ret = dh.copy_public_key((char*)block0.key.key, NULL)) != ERROR_SUCCESS) {
int pkey_size = 128;
if ((ret = dh.copy_public_key((char*)block0.key.key, pkey_size)) != ERROR_SUCCESS) {
srs_error("calc s1 key failed. ret=%d", ret);
return ret;
}
srs_assert(pkey_size == 128);
} else {
srs_digest_block_init(&block0.digest);
srs_key_block_init(&block1.key);
// directly generate the public key.
// @see: https://github.com/winlinvip/simple-rtmp-server/issues/148
if ((ret = dh.copy_public_key((char*)block1.key.key, NULL)) != ERROR_SUCCESS) {
int pkey_size = 128;
if ((ret = dh.copy_public_key((char*)block1.key.key, pkey_size)) != ERROR_SUCCESS) {
srs_error("calc s1 key failed. ret=%d", ret);
return ret;
}
srs_assert(pkey_size == 128);
}
srs_verbose("calc s1 key success.");

12
trunk/src/rtmp/srs_protocol_handshake.hpp
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@ -141,21 +141,21 @@ namespace _srs_internal
/**
* copy the public key.
* @param pkey the bytes to copy the public key.
* @param ppkey_size the max public key size, output the actual public key size.
* NULL to ignore.
* @param pkey_size the max public key size, output the actual public key size.
* user should never ignore this size.
* @remark, when ensure_128bytes_public_key, the size always 128.
*/
virtual int copy_public_key(char* pkey, int32_t* ppkey_size);
virtual int copy_public_key(char* pkey, int32_t& pkey_size);
/**
* generate and copy the shared key.
* generate the shared key with peer public key.
* @param ppkey peer public key.
* @param ppkey_size the size of ppkey.
* @param skey the computed shared key.
* @param pskey_size the max shared key size, output the actual shared key size.
* NULL to ignore.
* @param skey_size the max shared key size, output the actual shared key size.
* user should never ignore this size.
*/
virtual int copy_shared_key(const char* ppkey, int32_t ppkey_size, char* skey, int32_t* pskey_size);
virtual int copy_shared_key(const char* ppkey, int32_t ppkey_size, char* skey, int32_t& skey_size);
private:
virtual int do_initialize();
};

10
trunk/src/utest/srs_utest_protocol.cpp
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@ -243,10 +243,13 @@ VOID TEST(ProtocolHandshakeTest, DHKey)
ASSERT_TRUE(ERROR_SUCCESS == dh.initialize(true));
char pub_key1[128];
EXPECT_TRUE(ERROR_SUCCESS == dh.copy_public_key(pub_key1, NULL));
int pkey_size = 128;
EXPECT_TRUE(ERROR_SUCCESS == dh.copy_public_key(pub_key1, pkey_size));
ASSERT_EQ(128, pkey_size);
char pub_key2[128];
EXPECT_TRUE(ERROR_SUCCESS == dh.copy_public_key(pub_key2, NULL));
EXPECT_TRUE(ERROR_SUCCESS == dh.copy_public_key(pub_key2, pkey_size));
ASSERT_EQ(128, pkey_size);
EXPECT_TRUE(srs_bytes_equals(pub_key1, pub_key2, 128));
@ -255,7 +258,8 @@ VOID TEST(ProtocolHandshakeTest, DHKey)
ASSERT_TRUE(ERROR_SUCCESS == dh0.initialize(true));
EXPECT_TRUE(ERROR_SUCCESS == dh0.copy_public_key(pub_key2, NULL));
EXPECT_TRUE(ERROR_SUCCESS == dh0.copy_public_key(pub_key2, pkey_size));
ASSERT_EQ(128, pkey_size);
EXPECT_FALSE(srs_bytes_equals(pub_key1, pub_key2, 128));
}

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