Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
95	112	paramiko.message.Message.asbytes	call site: {node_id}	paramiko.dsskey.DSSKey.asbytes
18	243	paramiko.packet.Packetizer._build_packet	call site: {node_id}	cryptography.hazmat.primitives.ciphers.base._CipherContext.update
9	102	paramiko.util.b	call site: {node_id}	paramiko.rsakey.RSAKey.asbytes
6	31	cryptography.hazmat.backends.openssl.ciphers._CipherContext.__init__	call site: {node_id}	.isinstance
6	223	...paramiko.tests.fuzz_packetizer.TestOneInput	call site: {node_id}	paramiko.message.Message.add
5	0	EP	call site: {node_id}	paramiko.packet.Packetizer.__init__
5	43	cryptography.hazmat.backends.openssl.ciphers._CipherContext.__init__	call site: {node_id}	cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert
4	290	paramiko.packet.Packetizer.send_message	call site: {node_id}	paramiko.packet.Packetizer._log
3	230	paramiko.message.Message.add_bytes	call site: {node_id}	paramiko.common.byte_chr
3	285	paramiko.packet.Packetizer.write_all	call site: {node_id}	paramiko.packet.first_arg
2	27	cryptography.hazmat.backends.openssl.ciphers._CipherContext.__init__	call site: {node_id}	cryptography.hazmat.backends.openssl.backend.Backend.openssl_version_text
2	39	cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert	call site: {node_id}	cryptography.hazmat.bindings._rust.openssl.capture_error_stack

Fuzzer calltree


         ...paramiko.tests.fuzz_packetizer.TestOneInput

[function] [call site] 00000


           atheris.FuzzedDataProvider

[function] [call site] 00001


           loop.LoopSocket

[function] [call site] 00002


           loop.LoopSocket

[function] [call site] 00003


           loop.LoopSocket.link

[function] [call site] 00004


           paramiko.packet.Packetizer.__init__

[function] [call site] 00005


             
              .bytes

[function] [call site] 00006


             
              .bytes

[function] [call site] 00007


             
              .bytes

[function] [call site] 00008


             threading.RLock

[function] [call site] 00009


             time.time

[function] [call site] 00010


           cryptography.hazmat.primitives.ciphers.base.Cipher.__init__

[function] [call site] 00011


             
              .isinstance

[function] [call site] 00012


             
              .isinstance

[function] [call site] 00013


             cryptography.hazmat.primitives.ciphers.modes._check_aes_key_length

[function] [call site] 00014


             cryptography.hazmat.primitives.ciphers.modes._check_iv_and_key_length

[function] [call site] 00015


               
                .isinstance

[function] [call site] 00016


               cryptography.hazmat.primitives.ciphers.modes._check_aes_key_length

[function] [call site] 00017


               cryptography.hazmat.primitives.ciphers.modes._check_iv_length

[function] [call site] 00018


                 
                  .len

[function] [call site] 00019


           cryptography.hazmat.primitives.ciphers.base.Cipher.encryptor

[function] [call site] 00020


             
              .isinstance

[function] [call site] 00021


             cryptography.hazmat.backends.openssl.backend.Backend.create_symmetric_encryption_ctx

[function] [call site] 00022


               cryptography.hazmat.backends.openssl.ciphers._CipherContext.__init__

[function] [call site] 00023


                 
                  .isinstance

[function] [call site] 00024


                 cryptography.hazmat.bindings._rust._openssl.ffi.gc

[function] [call site] 00025


                 
                  .type

[function] [call site] 00026


                 
                  .type

[function] [call site] 00027


                 cryptography.hazmat.backends.openssl.backend.Backend.openssl_version_text

[function] [call site] 00028


                   cryptography.hazmat.bindings._rust._openssl.ffi.string

[function] [call site] 00029


                 
                  .isinstance

[function] [call site] 00030


                 cryptography.hazmat.bindings._rust._openssl.ffi.from_buffer

[function] [call site] 00031


                 
                  .isinstance

[function] [call site] 00032


                 cryptography.hazmat.bindings._rust._openssl.ffi.from_buffer

[function] [call site] 00033


                 
                  .isinstance

[function] [call site] 00034


                 cryptography.hazmat.bindings._rust._openssl.ffi.from_buffer

[function] [call site] 00035


                 
                  .isinstance

[function] [call site] 00036


                 cryptography.hazmat.bindings._rust._openssl.ffi.from_buffer

[function] [call site] 00037


                 cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00038


                   cryptography.hazmat.bindings.openssl.binding._openssl_assert

[function] [call site] 00039


                     cryptography.hazmat.bindings._rust.openssl.capture_error_stack

[function] [call site] 00040


                 
                  .len

[function] [call site] 00041


                 cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00042


                 
                  .isinstance

[function] [call site] 00043


                 
                  .len

[function] [call site] 00044


                 cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00045


                 
                  .len

[function] [call site] 00046


                 cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00047


                 cryptography.hazmat.bindings._rust._openssl.ffi.from_buffer

[function] [call site] 00048


                 cryptography.hazmat.backends.openssl.backend.Backend._consume_errors

[function] [call site] 00049


                   cryptography.hazmat.bindings._rust.openssl.capture_error_stack

[function] [call site] 00050


                 cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00051


             cryptography.hazmat.primitives.ciphers.base.Cipher._wrap_ctx

[function] [call site] 00052


               
                .isinstance

[function] [call site] 00053


               cryptography.hazmat.primitives.ciphers.base._AEADCipherContext.__init__

[function] [call site] 00054


               cryptography.hazmat.primitives.ciphers.base._AEADCipherContext.__init__

[function] [call site] 00055


               cryptography.hazmat.primitives.ciphers.base._CipherContext.__init__

[function] [call site] 00056


           cryptography.hazmat.primitives.ciphers.algorithms.AES.__init__

[function] [call site] 00057


             cryptography.hazmat.primitives.ciphers.algorithms._verify_key_size

[function] [call site] 00058


               cryptography.utils._check_byteslike

[function] [call site] 00059


                 
                  .memoryview

[function] [call site] 00060


               
                .len

[function] [call site] 00061


           fdp.ConsumeIntInRange

[function] [call site] 00062


           paramiko.common.byte_chr

[function] [call site] 00063


             
              .isinstance

[function] [call site] 00064


             struct.pack

[function] [call site] 00065


           cryptography.hazmat.primitives.ciphers.modes.CBC.__init__

[function] [call site] 00066


             cryptography.utils._check_byteslike

[function] [call site] 00067


           cryptography.hazmat.backends.default_backend

[function] [call site] 00068


           paramiko.packet.Packetizer.set_outbound_cipher

[function] [call site] 00069


           fdp.ConsumeIntInRange

[function] [call site] 00070


           paramiko.common.byte_chr

[function] [call site] 00071


           paramiko.message.Message.__init__

[function] [call site] 00072


             io.BytesIO

[function] [call site] 00073


             io.BytesIO

[function] [call site] 00074


           fdp.ConsumeIntInRange

[function] [call site] 00075


           
            .range

[function] [call site] 00076


           fdp.ConsumeIntInRange

[function] [call site] 00077


           fdp.ConsumeUnicodeNoSurrogates

[function] [call site] 00078


           paramiko.message.Message.add

[function] [call site] 00079


             paramiko.message.Message._add

[function] [call site] 00080


               
                .type

[function] [call site] 00081


               paramiko.message.Message.add_boolean

[function] [call site] 00082


                 io.BytesIO.write

[function] [call site] 00083


                 io.BytesIO.write

[function] [call site] 00084


               
                .isinstance

[function] [call site] 00085


               paramiko.message.Message.add_adaptive_int

[function] [call site] 00086


                 io.BytesIO.write

[function] [call site] 00087


                 paramiko.util.deflate_long

[function] [call site] 00088


                   
                    .bytes

[function] [call site] 00089


                   
                    .int

[function] [call site] 00090


                   struct.pack

[function] [call site] 00091


                   
                    .enumerate

[function] [call site] 00092


                   paramiko.common.byte_ord

[function] [call site] 00093


                     
                      .isinstance

[function] [call site] 00094


                     
                      .ord

[function] [call site] 00095


                   paramiko.common.byte_ord

[function] [call site] 00096


                 paramiko.message.Message.add_string

[function] [call site] 00097


                   paramiko.util.asbytes

[function] [call site] 00098


                     paramiko.util.b

[function] [call site] 00099


                       
                        .isinstance

[function] [call site] 00100


                       
                        .isinstance

[function] [call site] 00101


                       base64.decodebytes.encode

[function] [call site] 00102


                     base64.decodebytes.asbytes

[function] [call site] 00103


                     paramiko.rsakey.RSAKey.asbytes

[function] [call site] 00104


                       paramiko.message.Message.__init__

[function] [call site] 00105


                       paramiko.message.Message.add_string

[function] [call site] 00106


                       paramiko.message.Message.add_mpint

[function] [call site] 00107


                         paramiko.util.deflate_long

[function] [call site] 00108


                         paramiko.message.Message.add_string

[function] [call site] 00109


                       paramiko.message.Message.add_mpint

[function] [call site] 00110


                       paramiko.message.Message.asbytes

[function] [call site] 00111


                         io.BytesIO.getvalue

[function] [call site] 00112


                     base64.encodebytes.asbytes

[function] [call site] 00113


                     paramiko.dsskey.DSSKey.asbytes

[function] [call site] 00114


                       paramiko.message.Message.__init__

[function] [call site] 00115


                       paramiko.message.Message.add_string

[function] [call site] 00116


                       paramiko.message.Message.add_mpint

[function] [call site] 00117


                       paramiko.message.Message.add_mpint

[function] [call site] 00118


                       paramiko.message.Message.add_mpint

[function] [call site] 00119


                       paramiko.message.Message.add_mpint

[function] [call site] 00120


                       paramiko.message.Message.asbytes

[function] [call site] 00121


                     paramiko.ecdsakey.ECDSAKey.asbytes

[function] [call site] 00122


                       paramiko.message.Message.__init__

[function] [call site] 00123


                       paramiko.message.Message.add_string

[function] [call site] 00124


                       paramiko.message.Message.add_string

[function] [call site] 00125


                       cryptography.hazmat.backends.openssl.rsa._RSAPublicKey.public_numbers

[function] [call site] 00126


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00127


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00128


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00129


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00130


                         cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicNumbers.__init__

[function] [call site] 00131


                           
                            .isinstance

[function] [call site] 00132


                           
                            .isinstance

[function] [call site] 00133


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00134


                           cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00135


                           cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00136


                           cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00137


                           cryptography.hazmat.bindings._rust._openssl.ffi.buffer

[function] [call site] 00138


                           int.from_bytes

[function] [call site] 00139


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00140


                       cryptography.hazmat.backends.openssl.ec._EllipticCurvePublicKey.public_numbers

[function] [call site] 00141


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00142


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00143


                         cryptography.hazmat.backends.openssl.backend.Backend._tmp_bn_ctx

[function] [call site] 00144


                           cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00145


                           cryptography.hazmat.bindings._rust._openssl.ffi.gc

[function] [call site] 00146


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00147


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00148


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00149


                         cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicNumbers.__init__

[function] [call site] 00150


                           
                            .isinstance

[function] [call site] 00151


                           
                            .isinstance

[function] [call site] 00152


                           
                            .isinstance

[function] [call site] 00153


                       cryptography.hazmat.backends.openssl.dh._DHPublicKey.public_numbers

[function] [call site] 00154


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00155


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00156


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00157


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00158


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00159


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00160


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00161


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00162


                         cryptography.hazmat.primitives.asymmetric.dh.DHPublicNumbers.__init__

[function] [call site] 00163


                           
                            .isinstance

[function] [call site] 00164


                           
                            .isinstance

[function] [call site] 00165


                         cryptography.hazmat.primitives.asymmetric.dh.DHParameterNumbers.__init__

[function] [call site] 00166


                           
                            .isinstance

[function] [call site] 00167


                           
                            .isinstance

[function] [call site] 00168


                           
                            .isinstance

[function] [call site] 00169


                           p.bit_length

[function] [call site] 00170


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00171


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00172


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00173


                       cryptography.hazmat.backends.openssl.dsa._DSAPublicKey.public_numbers

[function] [call site] 00174


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00175


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00176


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00177


                         cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00178


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00179


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00180


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00181


                         cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00182


                         cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicNumbers.__init__

[function] [call site] 00183


                           
                            .isinstance

[function] [call site] 00184


                           
                            .isinstance

[function] [call site] 00185


                         cryptography.hazmat.primitives.asymmetric.dsa.DSAParameterNumbers.__init__

[function] [call site] 00186


                           
                            .isinstance

[function] [call site] 00187


                           
                            .isinstance

[function] [call site] 00188


                           
                            .isinstance

[function] [call site] 00189


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00190


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00191


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00192


                         cryptography.hazmat.backends.openssl.backend.Backend._bn_to_int

[function] [call site] 00193


                       paramiko.util.deflate_long

[function] [call site] 00194


                       
                        .len

[function] [call site] 00195


                       paramiko.util.deflate_long

[function] [call site] 00196


                       
                        .len

[function] [call site] 00197


                       paramiko.message.Message.add_string

[function] [call site] 00198


                       paramiko.message.Message.asbytes

[function] [call site] 00199


                     paramiko.message.Message.asbytes

[function] [call site] 00200


                     paramiko.ed25519key.Ed25519Key.asbytes

[function] [call site] 00201


                       paramiko.ed25519key.Ed25519Key.can_sign

[function] [call site] 00202


                       paramiko.message.Message.__init__

[function] [call site] 00203


                       paramiko.message.Message.add_string

[function] [call site] 00204


                       v.encode

[function] [call site] 00205


                       paramiko.message.Message.add_string

[function] [call site] 00206


                       paramiko.message.Message.asbytes

[function] [call site] 00207


                   
                    .len

[function] [call site] 00208


                   paramiko.message.Message.add_int

[function] [call site] 00209


                     struct.pack

[function] [call site] 00210


                     io.BytesIO.write

[function] [call site] 00211


                   io.BytesIO.write

[function] [call site] 00212


                 struct.pack

[function] [call site] 00213


                 io.BytesIO.write

[function] [call site] 00214


               
                .type

[function] [call site] 00215


               paramiko.message.Message.add_list

[function] [call site] 00216


                 paramiko.message.Message.add_string

[function] [call site] 00217


               paramiko.message.Message.add_string

[function] [call site] 00218


           fdp.ConsumeIntInRange

[function] [call site] 00219


           paramiko.message.Message.add

[function] [call site] 00220


           fdp.ConsumeBool

[function] [call site] 00221


           paramiko.message.Message.add

[function] [call site] 00222


           
            .list

[function] [call site] 00223


           
            .range

[function] [call site] 00224


           fdp.ConsumeUnicodeNoSurrogates

[function] [call site] 00225


           l1.append

[function] [call site] 00226


           paramiko.message.Message.add

[function] [call site] 00227


           fdp.ConsumeBytes

[function] [call site] 00228


           paramiko.message.Message.add_bytes

[function] [call site] 00229


             io.BytesIO.write

[function] [call site] 00230


           fdp.ConsumeIntInRange

[function] [call site] 00231


           paramiko.common.byte_chr

[function] [call site] 00232


           paramiko.message.Message.add_byte

[function] [call site] 00233


             io.BytesIO.write

[function] [call site] 00234


           paramiko.packet.Packetizer.send_message

[function] [call site] 00235


             paramiko.message.Message.asbytes

[function] [call site] 00236


             paramiko.common.byte_ord

[function] [call site] 00237


             
              .len

[function] [call site] 00238


             paramiko.packet.Packetizer._build_packet

[function] [call site] 00239


               
                .len

[function] [call site] 00240


               
                .len

[function] [call site] 00241


               struct.pack

[function] [call site] 00242


               os.urandom

[function] [call site] 00243


             paramiko.packet.Packetizer._log

[function] [call site] 00244


               
                .type

[function] [call site] 00245


               
                .issubclass

[function] [call site] 00246


             paramiko.util.format_binary

[function] [call site] 00247


               
                .len

[function] [call site] 00248


               paramiko.util.format_binary_line

[function] [call site] 00249


                 paramiko.common.byte_ord

[function] [call site] 00250


                 paramiko.common.byte_ord

[function] [call site] 00251


                 paramiko.common.byte_ord

[function] [call site] 00252


               out.append

[function] [call site] 00253


               
                .len

[function] [call site] 00254


               paramiko.util.format_binary_line

[function] [call site] 00255


               out.append

[function] [call site] 00256


             paramiko.packet.Packetizer._log

[function] [call site] 00257


             cryptography.hazmat.primitives.ciphers.base._AEADCipherContext.update

[function] [call site] 00258


               
                .len

[function] [call site] 00259


               cryptography.hazmat.primitives.ciphers.base._AEADCipherContext._check_limit

[function] [call site] 00260


             cryptography.hazmat.primitives.ciphers.base._CipherContext.update

[function] [call site] 00261


               cryptography.hazmat.backends.openssl.ciphers._CipherContext.update

[function] [call site] 00262


                 
                  .len

[function] [call site] 00263


                 
                  .bytearray

[function] [call site] 00264


                 cryptography.hazmat.backends.openssl.ciphers._CipherContext.update_into

[function] [call site] 00265


                   
                    .len

[function] [call site] 00266


                   
                    .len

[function] [call site] 00267


                   cryptography.hazmat.bindings._rust._openssl.ffi.new

[function] [call site] 00268


                   cryptography.hazmat.bindings._rust._openssl.ffi.from_buffer

[function] [call site] 00269


                   cryptography.hazmat.bindings._rust._openssl.ffi.from_buffer

[function] [call site] 00270


                   
                    .min

[function] [call site] 00271


                   
                    .isinstance

[function] [call site] 00272


                   cryptography.hazmat.backends.openssl.backend.Backend._consume_errors

[function] [call site] 00273


                   cryptography.hazmat.backends.openssl.backend.Backend.openssl_assert

[function] [call site] 00274


                 
                  .bytes

[function] [call site] 00275


             cryptography.hazmat.primitives.ciphers.base._AEADCipherContext.update

[function] [call site] 00276


             cryptography.hazmat.primitives.ciphers.base._CipherContext.update

[function] [call site] 00277


             struct.pack

[function] [call site] 00278


             paramiko.packet.compute_hmac

[function] [call site] 00279


               hmac.HMAC

[function] [call site] 00280


               hmac.HMAC.digest

[function] [call site] 00281


             paramiko.packet.Packetizer.write_all

[function] [call site] 00282


               time.time

[function] [call site] 00283


               
                .len

[function] [call site] 00284


               loop.LoopSocket.send

[function] [call site] 00285


               paramiko.packet.first_arg

[function] [call site] 00286


                 
                  .type

[function] [call site] 00287


                 
                  .len

[function] [call site] 00288


               
                .len

[function] [call site] 00289


             
              .len

[function] [call site] 00290


             paramiko.packet.Packetizer._log

[function] [call site] 00291


             msg.format

[function] [call site] 00292


             paramiko.packet.Packetizer._trigger_rekey

[function] [call site] 00293


           loop.LoopSocket.recv

[function] [call site] 00294