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Support openssl 1.0 and 1.1, RSA and ECDSA

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winlin 2020-04-03 13:43:13 +08:00
parent 81bb8747f2
commit 862c211acd
1 changed files with 159 additions and 82 deletions
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133
trunk/src/app/srs_app_dtls.cpp
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@ -30,6 +30,7 @@ using namespace std;
#include <srs_kernel_log.hpp>
#include <srtp2/srtp.h>
#include <openssl/ssl.h>
SrsDtls* SrsDtls::_instance = NULL;
@ -67,81 +68,156 @@ static int verify_callback(int preverify_ok, X509_STORE_CTX *ctx)
void SrsDtls::init()
{
// srtp init first
// Initialize SRTP first.
srs_assert(srtp_init() == 0);
// init dtls context
EVP_PKEY* dtls_private_key = EVP_PKEY_new();
srs_assert(dtls_private_key);
#if OPENSSL_VERSION_NUMBER < 0x10100000L // v1.1.x
// Initialize SSL library by registering algorithms
// The SSL_library_init() and OpenSSL_add_ssl_algorithms() functions were deprecated in OpenSSL 1.1.0 by OPENSSL_init_ssl().
// @see https://www.openssl.org/docs/man1.1.0/man3/OpenSSL_add_ssl_algorithms.html
// @see https://web.archive.org/web/20150806185102/http://sctp.fh-muenster.de:80/dtls/dtls_udp_echo.c
OpenSSL_add_ssl_algorithms();
#endif
#if OPENSSL_VERSION_NUMBER < 0x10002000L // v1.0.2
dtls_ctx = SSL_CTX_new(DTLSv1_method());
#else
//dtls_ctx = SSL_CTX_new(DTLS_method());
dtls_ctx = SSL_CTX_new(DTLSv1_method());
//dtls_ctx = SSL_CTX_new(DTLSv1_2_method());
#endif
// Create keys by RSA or ECDSA.
EVP_PKEY* dtls_pkey = EVP_PKEY_new();
srs_assert(dtls_pkey);
if (false) { // By RSA
RSA* rsa = RSA_new();
srs_assert(rsa);
// Initialize the big-number for private key.
BIGNUM* exponent = BN_new();
srs_assert(exponent);
BN_set_word(exponent, RSA_F4);
const std::string& aor = "www.hw.com";
int expire_day = 365;
int private_key_len = 1024;
// Generates a key pair and stores it in the RSA structure provided in rsa.
// @see https://www.openssl.org/docs/man1.0.2/man3/RSA_generate_key_ex.html
int key_bits = 1024;
RSA_generate_key_ex(rsa, key_bits, exponent, NULL);
RSA_generate_key_ex(rsa, private_key_len, exponent, NULL);
// @see https://www.openssl.org/docs/man1.1.0/man3/EVP_PKEY_type.html
srs_assert(EVP_PKEY_set1_RSA(dtls_pkey, rsa) == 1);
srs_assert(EVP_PKEY_set1_RSA(dtls_private_key, rsa) == 1);
RSA_free(rsa);
BN_free(exponent);
}
if (true) { // By ECDSA, https://stackoverflow.com/a/6006898
EC_KEY* eckey = EC_KEY_new();
srs_assert(eckey);
#if OPENSSL_VERSION_NUMBER >= 0x10002000L // v1.0.2
// For ECDSA, we could set the curves list.
// @see https://www.openssl.org/docs/man1.0.2/man3/SSL_CTX_set1_curves_list.html
SSL_CTX_set1_curves_list(dtls_ctx, "P-521:P-384:P-256");
#endif
// Should use the curves in ClientHello.supported_groups
// For example:
// Supported Group: x25519 (0x001d)
// Supported Group: secp256r1 (0x0017)
// Supported Group: secp384r1 (0x0018)
// @remark The curve NID_secp256k1 is not secp256r1, k1 != r1.
// TODO: FIXME: Parse ClientHello and choose the curve.
// Note that secp256r1 in openssl is called NID_X9_62_prime256v1, not NID_secp256k1
// @see https://stackoverflow.com/questions/41950056/openssl1-1-0-b-is-not-support-secp256r1openssl-ecparam-list-curves
EC_GROUP* ecgroup = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1);
//EC_GROUP* ecgroup = EC_GROUP_new_by_curve_name(NID_secp384r1);
srs_assert(ecgroup);
#if OPENSSL_VERSION_NUMBER < 0x10100000L // v1.1.x
// For openssl 1.0, we must set the group parameters, so that cert is ok.
// @see https://github.com/monero-project/monero/blob/master/contrib/epee/src/net_ssl.cpp#L225
EC_GROUP_set_asn1_flag(ecgroup, OPENSSL_EC_NAMED_CURVE);
#endif
srs_assert(EC_KEY_set_group(eckey, ecgroup) == 1);
srs_assert(EC_KEY_generate_key(eckey) == 1);
// For openssl <1.1, we must set the ECDH manually.
// @see https://stackoverrun.com/cn/q/10791887
#if OPENSSL_VERSION_NUMBER < 0x10100000L // v1.1.x
#if OPENSSL_VERSION_NUMBER < 0x10002000L // v1.0.2
SSL_CTX_set_tmp_ecdh(dtls_ctx, eckey);
#else
SSL_CTX_set_ecdh_auto(dtls_ctx, 1);
#endif
#endif
// @see https://www.openssl.org/docs/man1.1.0/man3/EVP_PKEY_type.html
srs_assert(EVP_PKEY_set1_EC_KEY(dtls_pkey, eckey) == 1);
EC_GROUP_free(ecgroup);
EC_KEY_free(eckey);
}
// Create certificate, from previous generated pkey.
// TODO: Support ECDSA certificate.
X509* dtls_cert = X509_new();
srs_assert(dtls_cert);
if (true) {
X509_NAME* subject = X509_NAME_new();
srs_assert(subject);
int serial = rand();
ASN1_INTEGER_set(X509_get_serialNumber(dtls_cert), serial);
const std::string& aor = "ossrs.net";
X509_NAME_add_entry_by_txt(subject, "CN", MBSTRING_ASC, (unsigned char *) aor.data(), aor.size(), -1, 0);
X509_set_issuer_name(dtls_cert, subject);
X509_set_subject_name(dtls_cert, subject);
int expire_day = 365;
const long cert_duration = 60*60*24*expire_day;
X509_gmtime_adj(X509_get_notBefore(dtls_cert), 0);
X509_gmtime_adj(X509_get_notAfter(dtls_cert), cert_duration);
srs_assert(X509_set_pubkey(dtls_cert, dtls_private_key) == 1);
X509_set_version(dtls_cert, 2);
srs_assert(X509_set_pubkey(dtls_cert, dtls_pkey) == 1);
srs_assert(X509_sign(dtls_cert, dtls_pkey, EVP_sha1()) != 0);
srs_assert(X509_sign(dtls_cert, dtls_private_key, EVP_sha1()) != 0);
// cleanup
RSA_free(rsa);
BN_free(exponent);
X509_NAME_free(subject);
}
dtls_ctx = SSL_CTX_new(DTLS_method());
// Setup DTLS context.
if (true) {
// We use "ALL", while you can use "DEFAULT" means "ALL:!EXPORT:!LOW:!aNULL:!eNULL:!SSLv2"
// @see https://www.openssl.org/docs/man1.0.2/man1/ciphers.html
srs_assert(SSL_CTX_set_cipher_list(dtls_ctx, "ALL") == 1);
// Setup the certificate.
srs_assert(SSL_CTX_use_certificate(dtls_ctx, dtls_cert) == 1);
srs_assert(SSL_CTX_use_PrivateKey(dtls_ctx, dtls_private_key) == 1);
srs_assert(SSL_CTX_set_cipher_list(dtls_ctx, "ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH") == 1);
// TODO: Maybe we can use SRTP-GCM in future.
// @see https://bugs.chromium.org/p/chromium/issues/detail?id=713701
// @see https://groups.google.com/forum/#!topic/discuss-webrtc/PvCbWSetVAQ
srs_assert(SSL_CTX_set_tlsext_use_srtp(dtls_ctx, "SRTP_AES128_CM_SHA1_80") == 0);
srs_assert(SSL_CTX_use_PrivateKey(dtls_ctx, dtls_pkey) == 1);
// Server will send Certificate Request.
// @see https://www.openssl.org/docs/man1.0.2/man3/SSL_CTX_set_verify.html
// TODO: FIXME: Config it, default to off to make the packet smaller.
SSL_CTX_set_verify(dtls_ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, verify_callback);
// The depth count is "level 0:peer certificate", "level 1: CA certificate",
// "level 2: higher level CA certificate", and so on.
// @see https://www.openssl.org/docs/man1.0.2/man3/SSL_CTX_set_verify.html
SSL_CTX_set_verify_depth(dtls_ctx, 4);
// Whether we should read as many input bytes as possible (for non-blocking reads) or not.
// @see https://www.openssl.org/docs/man1.0.2/man3/SSL_CTX_set_read_ahead.html
SSL_CTX_set_read_ahead(dtls_ctx, 1);
// dtls fingerprint
// TODO: Maybe we can use SRTP-GCM in future.
// @see https://bugs.chromium.org/p/chromium/issues/detail?id=713701
// @see https://groups.google.com/forum/#!topic/discuss-webrtc/PvCbWSetVAQ
// @remark Only support SRTP_AES128_CM_SHA1_80, please read ssl/d1_srtp.c
srs_assert(SSL_CTX_set_tlsext_use_srtp(dtls_ctx, "SRTP_AES128_CM_SHA1_80") == 0);
}
// Show DTLS fingerprint
if (true) {
char fp[100] = {0};
char *p = fp;
unsigned char md[EVP_MAX_MD_SIZE];
@ -164,3 +240,4 @@ void SrsDtls::init()
fingerprint.assign(fp, strlen(fp));
srs_trace("fingerprint=%s", fingerprint.c_str());
}
}