diff --git a/HISTORY.md b/HISTORY.md
index 02aaffe91b..0efcc82784 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,7 +1,7 @@
 Release History
 ===============
 
-3.0.0a0 (2023-??-??)
+3.0.0b0 (2023-09-??)
 -------------------
 
 **Removed**
@@ -41,6 +41,10 @@ Release History
 
 **Added**
 - Static type annotations thorough the whole package.
+- `cert` argument for client authentication with certificate can now pass the password/passphrase using a 3-values tuple (cert, key, password).
+  The three parameters in the tuple must be of type `str`.
+- `verify` argument behavior has been extended and now accept your CA bundle as `str` instead of a path. It also accepts your CA bundle as `bytes` directly.
+  This help when you do not have access to the fs.
 
 **Fixed**
 - An invalid content-type definition would cause the charset being evaluated to `True`, thus making the program crash.
diff --git a/src/niquests/_typing.py b/src/niquests/_typing.py
index ff7d61b063..80be2262ff 100644
--- a/src/niquests/_typing.py
+++ b/src/niquests/_typing.py
@@ -43,10 +43,12 @@
     typing.MutableMapping[str, str],
     CookieJar,
 ]
-#: Either Yes/No, or CA bundle pem location.
-TLSVerifyType: typing.TypeAlias = typing.Union[bool, str]
-#: Accept a pem certificate (concat cert, key) or an explicit tuple of cert, key pair.
-TLSClientCertType: typing.TypeAlias = typing.Union[str, typing.Tuple[str, str]]
+#: Either Yes/No, or CA bundle pem location. Or directly the raw bundle content itself.
+TLSVerifyType: typing.TypeAlias = typing.Union[bool, str, bytes]
+#: Accept a pem certificate (concat cert, key) or an explicit tuple of cert, key pair with an optional password.
+TLSClientCertType: typing.TypeAlias = typing.Union[
+    str, typing.Tuple[str, str], typing.Tuple[str, str, str]
+]
 #: All accepted ways to describe desired timeout.
 TimeoutType: typing.TypeAlias = typing.Union[
     int,  # TotalTimeout
diff --git a/src/niquests/adapters.py b/src/niquests/adapters.py
index aad58b08d0..328f7b6d84 100644
--- a/src/niquests/adapters.py
+++ b/src/niquests/adapters.py
@@ -283,27 +283,38 @@ def cert_verify(
         :param cert: The SSL certificate to verify.
         """
         if url.lower().startswith("https") and verify:
-            cert_loc = None
+            cert_loc: str | None = None
+            cert_data: bytes | None = None
 
-            # Allow self-specified cert location.
-            if verify is not True:
-                cert_loc = verify
+            if isinstance(verify, str) and "-----BEGIN CERTIFICATE-----" in verify:
+                verify = verify.encode("utf-8")
 
-            if not cert_loc:
-                cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
+            if isinstance(verify, bytes):
+                cert_data = verify
+            else:
+                # Allow self-specified cert location.
+                if verify is not True:
+                    cert_loc = verify
 
-            if not cert_loc or not os.path.exists(cert_loc):
-                raise OSError(
-                    f"Could not find a suitable TLS CA certificate bundle, "
-                    f"invalid path: {cert_loc}"
-                )
+                if not cert_loc:
+                    cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
+
+                if not cert_loc or not os.path.exists(cert_loc):
+                    raise OSError(
+                        f"Could not find a suitable TLS CA certificate bundle, "
+                        f"invalid path: {cert_loc}"
+                    )
 
             conn.cert_reqs = "CERT_REQUIRED"
 
-            if not os.path.isdir(cert_loc):
-                conn.ca_certs = cert_loc
-            else:
-                conn.ca_cert_dir = cert_loc
+            if cert_data:
+                # todo: update HTTPSConnPool in urllib3.future and add it!
+                conn.ca_data = cert_data  # type: ignore[attr-defined]
+            elif cert_loc:
+                if not os.path.isdir(cert_loc):
+                    conn.ca_certs = cert_loc
+                else:
+                    conn.ca_cert_dir = cert_loc
         else:
             conn.cert_reqs = "CERT_NONE"
             conn.ca_certs = None
@@ -313,9 +324,11 @@ def cert_verify(
             if not isinstance(cert, str):
                 conn.cert_file = cert[0]
                 conn.key_file = cert[1]
+                conn.key_password = cert[2] if len(cert) == 3 else None  # type: ignore[misc]
             else:
                 conn.cert_file = cert
                 conn.key_file = None
+                conn.key_password = None
             if conn.cert_file and not os.path.exists(conn.cert_file):
                 raise OSError(
                     f"Could not find the TLS certificate file, "