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crypto/tls: rework reference tests. The practice of storing reference connections for testing has worked reasonably well, but the large blocks of literal data in the .go files is ugly and updating the tests is a real problem because their number has grown. This CL changes the way that reference tests work. It's now possible to automatically update the tests and the test data is now stored in testdata/. This should make it easier to implement changes that affect all connections, like implementing the renegotiation extension. R=golang-codereviews, r CC=golang-codereviews https://golang.org/cl/42060044
2013-12-20 16:37:05 +00:00
>>> Flow 1 (client to server)
crypto/tls: advertise support for SHA-512 signatures in 1.2 This is the equivalent change to 1c105980 but for SHA-512. SHA-512 certificates are already supported by default since b53bb2ca, but some servers will refuse connections if the algorithm is not advertised in the overloaded signatureAndHash extension (see 09b238f1). This required adding support for SHA-512 signatures on CertificateVerify and ServerKeyExchange messages, because of said overloading. Some testdata/Client-TLSv1{0,1} files changed because they send a 1.2 ClientHello even if the server picks a lower version. Closes #22422 Change-Id: I16282d03a3040260d203711ec21e6b20a0e1e105 Reviewed-on: https://go-review.googlesource.com/74950 Run-TryBot: Filippo Valsorda <hi@filippo.io> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Adam Langley <agl@golang.org>
2017-10-31 23:43:05 +00:00
00000000 16 03 01 00 a7 01 00 00 a3 03 03 7e 8a c0 04 93 |...........~....|
00000010 7a be 32 5c b3 38 83 b1 ec d0 31 8d a1 61 f3 2b |z.2\.8....1..a.+|
00000020 b2 6a 0d 08 71 41 fb 20 c2 46 0c 00 00 38 c0 2c |.j..qA. .F...8.,|
crypto/tls: switch to OpenSSL 1.1.0 for test data. We will need OpenSSL 1.1.0 in order to test some of the features expected for Go 1.8. However, 1.1.0 also disables (by default) some things that we still want to test, such as RC4, 3DES and SSLv3. Thus developers wanting to update the crypto/tls test data will need to build OpenSSL from source. This change updates the test data with transcripts generated by 1.1.0 (in order to reduce future diffs) and also causes a banner to be printed if 1.1.0 is not used when updating. (The test for an ALPN mismatch is removed because OpenSSL now terminates the connection with a fatal alert if no known ALPN protocols are offered. There's no point testing against this because it's an OpenSSL behaviour.) Change-Id: I957516975e0b8c7def84184f65c81d0b68f1c551 Reviewed-on: https://go-review.googlesource.com/30821 Run-TryBot: Adam Langley <agl@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-10-11 18:08:57 +01:00
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00000050 00 39 c0 09 c0 13 00 33 00 9d 00 9c 00 3d 00 3c |.9.....3.....=.<|
00000060 00 35 00 2f 00 ff 01 00 00 42 00 0b 00 04 03 00 |.5./.....B......|
00000070 01 02 00 0a 00 0a 00 08 00 1d 00 17 00 19 00 18 |................|
00000080 00 0d 00 20 00 1e 06 01 06 02 06 03 05 01 05 02 |... ............|
00000090 05 03 04 01 04 02 04 03 03 01 03 02 03 03 02 01 |................|
000000a0 02 02 02 03 00 16 00 00 00 17 00 00 |............|
crypto/tls: rework reference tests. The practice of storing reference connections for testing has worked reasonably well, but the large blocks of literal data in the .go files is ugly and updating the tests is a real problem because their number has grown. This CL changes the way that reference tests work. It's now possible to automatically update the tests and the test data is now stored in testdata/. This should make it easier to implement changes that affect all connections, like implementing the renegotiation extension. R=golang-codereviews, r CC=golang-codereviews https://golang.org/cl/42060044
2013-12-20 16:37:05 +00:00
>>> Flow 2 (server to client)
crypto/ecdsa: make Sign safe with broken entropy sources ECDSA is unsafe to use if an entropy source produces predictable output for the ephemeral nonces. E.g., [Nguyen]. A simple countermeasure is to hash the secret key, the message, and entropy together to seed a CSPRNG, from which the ephemeral key is derived. Fixes #9452 -- This is a minimalist (in terms of patch size) solution, though not the most parsimonious in its use of primitives: - csprng_key = ChopMD-256(SHA2-512(priv.D||entropy||hash)) - reader = AES-256-CTR(k=csprng_key) This, however, provides at most 128-bit collision-resistance, so that Adv will have a term related to the number of messages signed that is significantly worse than plain ECDSA. This does not seem to be of any practical importance. ChopMD-256(SHA2-512(x)) is used, rather than SHA2-256(x), for two sets of reasons: *Practical:* SHA2-512 has a larger state and 16 more rounds; it is likely non-generically stronger than SHA2-256. And, AFAIK, cryptanalysis backs this up. (E.g., [Biryukov] gives a distinguisher on 47-round SHA2-256 with cost < 2^85.) This is well below a reasonable security-strength target. *Theoretical:* [Coron] and [Chang] show that Chop-MD(F(x)) is indifferentiable from a random oracle for slightly beyond the birthday barrier. It seems likely that this makes a generic security proof that this construction remains UF-CMA is possible in the indifferentiability framework. -- Many thanks to Payman Mohassel for reviewing this construction; any mistakes are mine, however. And, as he notes, reusing the private key in this way means that the generic-group (non-RO) proof of ECDSA's security given in [Brown] no longer directly applies. -- [Brown]: http://www.cacr.math.uwaterloo.ca/techreports/2000/corr2000-54.ps "Brown. The exact security of ECDSA. 2000" [Coron]: https://www.cs.nyu.edu/~puniya/papers/merkle.pdf "Coron et al. Merkle-Damgard revisited. 2005" [Chang]: https://www.iacr.org/archive/fse2008/50860436/50860436.pdf "Chang and Nandi. Improved indifferentiability security analysis of chopMD hash function. 2008" [Biryukov]: http://www.iacr.org/archive/asiacrypt2011/70730269/70730269.pdf "Biryukov et al. Second-order differential collisions for reduced SHA-256. 2011" [Nguyen]: ftp://ftp.di.ens.fr/pub/users/pnguyen/PubECDSA.ps "Nguyen and Shparlinski. The insecurity of the elliptic curve digital signature algorithm with partially known nonces. 2003" New tests: TestNonceSafety: Check that signatures are safe even with a broken entropy source. TestINDCCA: Check that signatures remain non-deterministic with a functional entropy source. Updated "golden" KATs in crypto/tls/testdata that use ECDSA suites. Change-Id: I55337a2fbec2e42a36ce719bd2184793682d678a Reviewed-on: https://go-review.googlesource.com/3340 Reviewed-by: Adam Langley <agl@golang.org>
2015-01-27 07:00:21 +00:00
00000000 16 03 03 00 31 02 00 00 2d 03 03 00 00 00 00 00 |....1...-.......|
crypto/tls: rework reference tests. The practice of storing reference connections for testing has worked reasonably well, but the large blocks of literal data in the .go files is ugly and updating the tests is a real problem because their number has grown. This CL changes the way that reference tests work. It's now possible to automatically update the tests and the test data is now stored in testdata/. This should make it easier to implement changes that affect all connections, like implementing the renegotiation extension. R=golang-codereviews, r CC=golang-codereviews https://golang.org/cl/42060044
2013-12-20 16:37:05 +00:00
00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
crypto/ecdsa: make Sign safe with broken entropy sources ECDSA is unsafe to use if an entropy source produces predictable output for the ephemeral nonces. E.g., [Nguyen]. A simple countermeasure is to hash the secret key, the message, and entropy together to seed a CSPRNG, from which the ephemeral key is derived. Fixes #9452 -- This is a minimalist (in terms of patch size) solution, though not the most parsimonious in its use of primitives: - csprng_key = ChopMD-256(SHA2-512(priv.D||entropy||hash)) - reader = AES-256-CTR(k=csprng_key) This, however, provides at most 128-bit collision-resistance, so that Adv will have a term related to the number of messages signed that is significantly worse than plain ECDSA. This does not seem to be of any practical importance. ChopMD-256(SHA2-512(x)) is used, rather than SHA2-256(x), for two sets of reasons: *Practical:* SHA2-512 has a larger state and 16 more rounds; it is likely non-generically stronger than SHA2-256. And, AFAIK, cryptanalysis backs this up. (E.g., [Biryukov] gives a distinguisher on 47-round SHA2-256 with cost < 2^85.) This is well below a reasonable security-strength target. *Theoretical:* [Coron] and [Chang] show that Chop-MD(F(x)) is indifferentiable from a random oracle for slightly beyond the birthday barrier. It seems likely that this makes a generic security proof that this construction remains UF-CMA is possible in the indifferentiability framework. -- Many thanks to Payman Mohassel for reviewing this construction; any mistakes are mine, however. And, as he notes, reusing the private key in this way means that the generic-group (non-RO) proof of ECDSA's security given in [Brown] no longer directly applies. -- [Brown]: http://www.cacr.math.uwaterloo.ca/techreports/2000/corr2000-54.ps "Brown. The exact security of ECDSA. 2000" [Coron]: https://www.cs.nyu.edu/~puniya/papers/merkle.pdf "Coron et al. Merkle-Damgard revisited. 2005" [Chang]: https://www.iacr.org/archive/fse2008/50860436/50860436.pdf "Chang and Nandi. Improved indifferentiability security analysis of chopMD hash function. 2008" [Biryukov]: http://www.iacr.org/archive/asiacrypt2011/70730269/70730269.pdf "Biryukov et al. Second-order differential collisions for reduced SHA-256. 2011" [Nguyen]: ftp://ftp.di.ens.fr/pub/users/pnguyen/PubECDSA.ps "Nguyen and Shparlinski. The insecurity of the elliptic curve digital signature algorithm with partially known nonces. 2003" New tests: TestNonceSafety: Check that signatures are safe even with a broken entropy source. TestINDCCA: Check that signatures remain non-deterministic with a functional entropy source. Updated "golden" KATs in crypto/tls/testdata that use ECDSA suites. Change-Id: I55337a2fbec2e42a36ce719bd2184793682d678a Reviewed-on: https://go-review.googlesource.com/3340 Reviewed-by: Adam Langley <agl@golang.org>
2015-01-27 07:00:21 +00:00
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crypto/tls: advertise support for SHA-512 signatures in 1.2 This is the equivalent change to 1c105980 but for SHA-512. SHA-512 certificates are already supported by default since b53bb2ca, but some servers will refuse connections if the algorithm is not advertised in the overloaded signatureAndHash extension (see 09b238f1). This required adding support for SHA-512 signatures on CertificateVerify and ServerKeyExchange messages, because of said overloading. Some testdata/Client-TLSv1{0,1} files changed because they send a 1.2 ClientHello even if the server picks a lower version. Closes #22422 Change-Id: I16282d03a3040260d203711ec21e6b20a0e1e105 Reviewed-on: https://go-review.googlesource.com/74950 Run-TryBot: Filippo Valsorda <hi@filippo.io> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Adam Langley <agl@golang.org>
2017-10-31 23:43:05 +00:00
00000240 7b 6a 0f 39 95 12 07 8f 2a 16 03 03 00 b6 0c 00 |{j.9....*.......|
00000250 00 b2 03 00 1d 20 2f e5 7d a3 47 cd 62 43 15 28 |..... /.}.G.bC.(|
crypto/tls: enable X25519 by default. Since this changes the offered curves in the ClientHello, all the test data needs to be updated too. Change-Id: I227934711104349c0f0eab11d854e5a2adcbc363 Reviewed-on: https://go-review.googlesource.com/30825 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2016-10-11 23:08:35 +01:00
00000260 da ac 5f bb 29 07 30 ff f6 84 af c4 cf c2 ed 90 |.._.).0.........|
crypto/tls: advertise support for SHA-512 signatures in 1.2 This is the equivalent change to 1c105980 but for SHA-512. SHA-512 certificates are already supported by default since b53bb2ca, but some servers will refuse connections if the algorithm is not advertised in the overloaded signatureAndHash extension (see 09b238f1). This required adding support for SHA-512 signatures on CertificateVerify and ServerKeyExchange messages, because of said overloading. Some testdata/Client-TLSv1{0,1} files changed because they send a 1.2 ClientHello even if the server picks a lower version. Closes #22422 Change-Id: I16282d03a3040260d203711ec21e6b20a0e1e105 Reviewed-on: https://go-review.googlesource.com/74950 Run-TryBot: Filippo Valsorda <hi@filippo.io> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Adam Langley <agl@golang.org>
2017-10-31 23:43:05 +00:00
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crypto/tls: rework reference tests. The practice of storing reference connections for testing has worked reasonably well, but the large blocks of literal data in the .go files is ugly and updating the tests is a real problem because their number has grown. This CL changes the way that reference tests work. It's now possible to automatically update the tests and the test data is now stored in testdata/. This should make it easier to implement changes that affect all connections, like implementing the renegotiation extension. R=golang-codereviews, r CC=golang-codereviews https://golang.org/cl/42060044
2013-12-20 16:37:05 +00:00
>>> Flow 3 (client to server)
crypto/tls: advertise support for SHA-512 signatures in 1.2 This is the equivalent change to 1c105980 but for SHA-512. SHA-512 certificates are already supported by default since b53bb2ca, but some servers will refuse connections if the algorithm is not advertised in the overloaded signatureAndHash extension (see 09b238f1). This required adding support for SHA-512 signatures on CertificateVerify and ServerKeyExchange messages, because of said overloading. Some testdata/Client-TLSv1{0,1} files changed because they send a 1.2 ClientHello even if the server picks a lower version. Closes #22422 Change-Id: I16282d03a3040260d203711ec21e6b20a0e1e105 Reviewed-on: https://go-review.googlesource.com/74950 Run-TryBot: Filippo Valsorda <hi@filippo.io> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Adam Langley <agl@golang.org>
2017-10-31 23:43:05 +00:00
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00000070 98 32 54 4c ff |.2TL.|
crypto/tls: rework reference tests. The practice of storing reference connections for testing has worked reasonably well, but the large blocks of literal data in the .go files is ugly and updating the tests is a real problem because their number has grown. This CL changes the way that reference tests work. It's now possible to automatically update the tests and the test data is now stored in testdata/. This should make it easier to implement changes that affect all connections, like implementing the renegotiation extension. R=golang-codereviews, r CC=golang-codereviews https://golang.org/cl/42060044
2013-12-20 16:37:05 +00:00
>>> Flow 4 (server to client)
00000000 14 03 03 00 01 01 16 03 03 00 40 00 00 00 00 00 |..........@.....|
crypto/tls: advertise support for SHA-512 signatures in 1.2 This is the equivalent change to 1c105980 but for SHA-512. SHA-512 certificates are already supported by default since b53bb2ca, but some servers will refuse connections if the algorithm is not advertised in the overloaded signatureAndHash extension (see 09b238f1). This required adding support for SHA-512 signatures on CertificateVerify and ServerKeyExchange messages, because of said overloading. Some testdata/Client-TLSv1{0,1} files changed because they send a 1.2 ClientHello even if the server picks a lower version. Closes #22422 Change-Id: I16282d03a3040260d203711ec21e6b20a0e1e105 Reviewed-on: https://go-review.googlesource.com/74950 Run-TryBot: Filippo Valsorda <hi@filippo.io> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Adam Langley <agl@golang.org>
2017-10-31 23:43:05 +00:00
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00000040 64 08 41 d6 70 ab cf 9d 75 c5 e1 17 03 03 00 40 |d.A.p...u......@|
crypto/tls: rework reference tests. The practice of storing reference connections for testing has worked reasonably well, but the large blocks of literal data in the .go files is ugly and updating the tests is a real problem because their number has grown. This CL changes the way that reference tests work. It's now possible to automatically update the tests and the test data is now stored in testdata/. This should make it easier to implement changes that affect all connections, like implementing the renegotiation extension. R=golang-codereviews, r CC=golang-codereviews https://golang.org/cl/42060044
2013-12-20 16:37:05 +00:00
00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
crypto/tls: advertise support for SHA-512 signatures in 1.2 This is the equivalent change to 1c105980 but for SHA-512. SHA-512 certificates are already supported by default since b53bb2ca, but some servers will refuse connections if the algorithm is not advertised in the overloaded signatureAndHash extension (see 09b238f1). This required adding support for SHA-512 signatures on CertificateVerify and ServerKeyExchange messages, because of said overloading. Some testdata/Client-TLSv1{0,1} files changed because they send a 1.2 ClientHello even if the server picks a lower version. Closes #22422 Change-Id: I16282d03a3040260d203711ec21e6b20a0e1e105 Reviewed-on: https://go-review.googlesource.com/74950 Run-TryBot: Filippo Valsorda <hi@filippo.io> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Adam Langley <agl@golang.org>
2017-10-31 23:43:05 +00:00
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00000080 5f 63 95 ba bb e2 f3 b3 ef 5b d8 bf 56 0b 60 53 |_c.......[..V.`S|
crypto/tls: rework reference tests. The practice of storing reference connections for testing has worked reasonably well, but the large blocks of literal data in the .go files is ugly and updating the tests is a real problem because their number has grown. This CL changes the way that reference tests work. It's now possible to automatically update the tests and the test data is now stored in testdata/. This should make it easier to implement changes that affect all connections, like implementing the renegotiation extension. R=golang-codereviews, r CC=golang-codereviews https://golang.org/cl/42060044
2013-12-20 16:37:05 +00:00
00000090 15 03 03 00 30 00 00 00 00 00 00 00 00 00 00 00 |....0...........|
crypto/tls: advertise support for SHA-512 signatures in 1.2 This is the equivalent change to 1c105980 but for SHA-512. SHA-512 certificates are already supported by default since b53bb2ca, but some servers will refuse connections if the algorithm is not advertised in the overloaded signatureAndHash extension (see 09b238f1). This required adding support for SHA-512 signatures on CertificateVerify and ServerKeyExchange messages, because of said overloading. Some testdata/Client-TLSv1{0,1} files changed because they send a 1.2 ClientHello even if the server picks a lower version. Closes #22422 Change-Id: I16282d03a3040260d203711ec21e6b20a0e1e105 Reviewed-on: https://go-review.googlesource.com/74950 Run-TryBot: Filippo Valsorda <hi@filippo.io> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Adam Langley <agl@golang.org>
2017-10-31 23:43:05 +00:00
000000a0 00 00 00 00 00 4d 2c 41 d8 4c 63 71 bd bc 83 5a |.....M,A.Lcq...Z|
000000b0 1b 2b b7 20 5b 14 51 d4 5b 38 4b fc 61 58 97 34 |.+. [.Q.[8K.aX.4|
000000c0 1a cf 08 f1 16 |.....|
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