Provide RSA2048 as per RFC

webrtc/base/sslidentity.cc

Index: webrtc/base/sslidentity.cc
diff --git a/webrtc/base/sslidentity.cc b/webrtc/base/sslidentity.cc
index ce209dd4167c2211fdc80649be4dca7a48b3b487..180e60c58bbdeea6f67bab7331d93d6cba88dda6 100644
--- a/webrtc/base/sslidentity.cc
+++ b/webrtc/base/sslidentity.cc
@@ -18,6 +18,7 @@
 #include <string>
 
 #include "webrtc/base/base64.h"
+#include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/sslconfig.h"
 
@@ -33,6 +34,55 @@ const char kPemTypeCertificate[] = "CERTIFICATE";
 const char kPemTypeRsaPrivateKey[] = "RSA PRIVATE KEY";
 const char kPemTypeEcPrivateKey[] = "EC PRIVATE KEY";
 
+KeyParams::KeyParams(KeyType key_type) {
+  if (key_type == KT_ECDSA) {
+    type_ = KT_ECDSA;
+    params_.curve = EC_NIST_P256;
+  } else if (key_type == KT_RSA) {
+    type_ = KT_RSA;
+    params_.rsa.mod_size = kRsaDefaultModSize;
+    params_.rsa.pub_exp = kRsaDefaultExponent;
+  } else {
+    RTC_NOTREACHED();
+  }
+}
+
+// static
+KeyParams KeyParams::RSA(int mod_size, int pub_exp) {
+  KeyParams kt(KT_RSA);
+  kt.params_.rsa.mod_size = mod_size;
+  kt.params_.rsa.pub_exp = pub_exp;
+  return kt;
+}
+
+// static
+KeyParams KeyParams::ECDSA(ECCurve curve) {
+  KeyParams kt(KT_ECDSA);
+  kt.params_.curve = curve;
+  return kt;
+}
+
+bool KeyParams::IsValid() const {
+  if (type_ == KT_RSA) {
+    return (params_.rsa.mod_size >= kRsaMinModSize &&
+            params_.rsa.mod_size <= kRsaMaxModSize &&
+            params_.rsa.pub_exp > params_.rsa.mod_size);
+  } else if (type_ == KT_ECDSA) {
+    return (params_.curve == EC_NIST_P256);
+  }
+  return false;
+}
+
+RSAParams KeyParams::rsa_params() const {
+  RTC_DCHECK(type_ == KT_RSA);
+  return params_.rsa;
+}
+
+ECCurve KeyParams::ec_curve() const {
+  RTC_DCHECK(type_ == KT_ECDSA);
+  return params_.curve;
+}
+
 KeyType IntKeyTypeFamilyToKeyType(int key_type_family) {
   return static_cast<KeyType>(key_type_family);
 }
@@ -108,8 +158,8 @@ SSLCertificate* SSLCertificate::FromPEMString(const std::string& pem_string) {
 }
 
 SSLIdentity* SSLIdentity::Generate(const std::string& common_name,
-                                   KeyType key_type) {
-  return OpenSSLIdentity::Generate(common_name, key_type);
+                                   const KeyParams& key_params) {
+  return OpenSSLIdentity::Generate(common_name, key_params);
 }
 
 SSLIdentity* SSLIdentity::GenerateForTest(const SSLIdentityParams& params) {