Implementation of the Authorization Code with PKCE flow for public clients

README.md

@@ -21,6 +21,7 @@ This service implements [OAuth 2.0 specification](https://tools.ietf.org/html/rf
  * [Client Authentication](#client-authentication)
  * [Grant Types](#grant-types)
  * [Authorization Code](#authorization-code)
+ * [Authorization Code with PKCE](#authorization-code-with-pkce)
  * [Implicit](#implicit)
  * [Resource Owner Password Credentials](#resource-owner-password-credentials)
  * [Client Credentials](#client-credentials)
@@ -133,6 +134,90 @@ The authorization server authenticates the client, validates the authorization c
 }
 ```
 
+#### Authorization Code with PKCE
+
+https://tools.ietf.org/html/rfc7636
+
+Authorization Code with PKCE (Proof Key for Code Exchange) allows for a safer flow than Authorization Code for public clients, e.g SPA (Single Page Apps) and Native (e.g. mobile, or compiled) applications, or any other client where the client secret cannot be reliably or safely stored.
+
+
+```
++----------+
+| Resource |
+| Owner |
+| |
++----------+
+ ^
+ |
+ (B) Client Identifier,
++----|-----+ Code Challenge, +---------------+
+| -+----(A)-- & Redirection URI ---->| |
+| User- | | Authorization |
+| Agent -+----(B)-- User authenticates --->| Server |
+| | | |
+| -+----(C)-- Authorization Code ---<| |
++-|----|---+ +---------------+
+ | | ^ v
+ (A) (C) | |
+ | | | |
+ ^ v | |
++---------+ Authorization Code, | |
+| |>---(D)-- Code Verifier, ---------' |
+| Client | & Redirection URI |
+| | |
+| |<---(E)----- Access Token -------------------'
++---------+ (w/ Optional Refresh Token)
+```
+
+Key differences from plain Authorization Code flow are that a code challenge is also sent in (A), and the code verifier is send in (D) instead of basic auth and/or client_id + client_secret.
+
+There are two challenge methods, `PLAIN` and `S256`. The User-Agent must generate both a challenge and verification code at the start. For `plain`, they are simply the same string. `PLAIN` is not recommended for use, and is reserved for situations where the `S256` challenge is unable to be supported for some technical reason [https://tools.ietf.org/html/rfc7636#section-4.2].
+
+The code verifier must be a (high-entropy cryptographic) random string, 43 to 128 characters long, comprised of `[[A-Z] / [a-z] / [0-9] / "-" / "." / "_" / "~"` [https://tools.ietf.org/html/rfc7636#section-4.1].
+
+For `S256` the code challenge is the URL-Safe Base64 encoded SHA256 hash of the code verifier [https://tools.ietf.org/html/rfc7636#section-4.2].
+
+##### Example
+
+The client MUST have `public=true` in the database.
+
+For testing, PKCE Verifier and Challenge can be created here - https://tonyxu-io.github.io/pkce-generator/.
+
+- Verifier - `ThisIsAVerifier`
+- Challenge - `f866CDl1fJqqejcBLMjQ9UdbRhT9KY0bmD9O88RNvEY`
+
+```
+http://localhost:8080/web/authorize?client_id=test_client_1&redirect_uri=https%3A%2F%2Fwww.example.com&response_type=code&state=somestate&scope=read_write&code_challenge=f866CDl1fJqqejcBLMjQ9UdbRhT9KY0bmD9O88RNvEY&code_challenge_method=S256
+```
+
+Note the `code_challenge` and `code_challenge_method` query parameters in the above URL. The redirect page will receive the same parameters as the normal Authorization Code flow.
+
+```
+https://www.example.com/?code=327adafb-393a-43c0-a0e1-d7da651ac7aa&state=somestate
+```
+
+To obtain the token, the request is similar to Authorization Code, but omiting the client secret, and adding in the code_verifier.
+
+```
+curl --compressed -v localhost:8080/v1/oauth/tokens \
+ -d "client_id=test_client_1" \
+ -d "grant_type=authorization_code" \
+ -d "code=327adafb-393a-43c0-a0e1-d7da651ac7aa" \
+ -d "redirect_uri=https://www.example.com" \
+ -d "code_verifier=ThisIsAVerifier"
+```
+Returns: 
+```
+{
+ "user_id":"1",
+ "access_token":"60f25bd5-4bb8-408a-b39a-fe227d2b243a",
+ "expires_in":3600,
+ "token_type":"Bearer",
+ "scope":"read_write",
+ "refresh_token":"47325775-8a9b-4a35-bfd9-1685929feda6"
+}
+```
+
 #### Implicit
 
 http://tools.ietf.org/html/rfc6749#section-4.2

go.mod

@@ -1,5 +1,7 @@
 module github.com/RichardKnop/go-oauth2-server
 
+go 1.14
+
 require (
  cloud.google.com/go v0.36.0 // indirect
  dmitri.shuralyov.com/app/changes v0.0.0-20181114035150-5af16e21babb // indirect
@@ -90,13 +92,13 @@ require (
  go.opencensus.io v0.19.0 // indirect
  go4.org v0.0.0-20190218023631-ce4c26f7be8e // indirect
  golang.org/x/build v0.0.0-20190221024721-9e83d8587038 // indirect
- golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2
+ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550
  golang.org/x/exp v0.0.0-20190212162250-21964bba6549 // indirect
- golang.org/x/net v0.0.0-20190213061140-3a22650c66bd
+ golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
+ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b
  golang.org/x/oauth2 v0.0.0-20190220154721-9b3c75971fc9 // indirect
  golang.org/x/perf v0.0.0-20190124201629-844a5f5b46f4 // indirect
- golang.org/x/sys v0.0.0-20190221075227-b4e8571b14e0 // indirect
- golang.org/x/tools v0.0.0-20190221000707-a754db16a40a // indirect
+ golang.org/x/tools v0.0.0-20200321014904-268ba720d32c // indirect
  google.golang.org/genproto v0.0.0-20190219182410-082222b4a5c5 // indirect
  google.golang.org/grpc v1.18.0 // indirect
  gopkg.in/tylerb/graceful.v1 v1.2.15

go.sum

@@ -56,7 +56,7 @@ github.com/coreos/bbolt v1.3.0/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkE
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.2.14+incompatible h1:Z78gyTe1SqhMYcOA7Z9/6PxKfgOVacHJ1FtmBVdRPP4=
 github.com/coreos/etcd v3.2.14+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
-github.com/coreos/etcd v3.3.12+incompatible h1:5k8nkcBSvltjOO5RLflnXevOJXndlKIMbvVnMTX+cUU=
+github.com/coreos/etcd v3.3.12+incompatible h1:pAWNwdf7QiT1zfaWyqCtNZQWCLByQyA3JrSQyuYAqnQ=
 github.com/coreos/etcd v3.3.12+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
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 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
@@ -68,6 +68,7 @@ github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f h1:lBNOc5arjvs8E5mO2tbp
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/denisenkom/go-mssqldb v0.0.0-20180901172138-1eb28afdf9b6 h1:BZGp1dbKFjqlGmxEpwkDpCWNxVwEYnUPoncIzLiHlPo=
 github.com/denisenkom/go-mssqldb v0.0.0-20180901172138-1eb28afdf9b6/go.mod h1:xN/JuLBIz4bjkxNmByTiV1IbhfnYb6oo99phBn4Eqhc=
@@ -168,7 +169,7 @@ github.com/hashicorp/go-multierror v1.0.0 h1:iVjPR7a6H0tWELX5NxNe7bYopibicUzc7uP
 github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
 github.com/hashicorp/go-rootcerts v0.0.0-20160503143440-6bb64b370b90 h1:9HVkPxOpo+yO93Ah4yrO67d/qh0fbLLWbKqhYjyHq9A=
 github.com/hashicorp/go-rootcerts v0.0.0-20160503143440-6bb64b370b90/go.mod h1:o4zcYY1e0GEZI6eSEr+43QDYmuGglw1qSO6qdHUHCgg=
-github.com/hashicorp/go-rootcerts v1.0.0 h1:ueI78wUjYExhCvMLow4icJnayNNFRgy0d9EGs/a1T44=
+github.com/hashicorp/go-rootcerts v1.0.0 h1:Rqb66Oo1X/eSV1x66xbDccZjhJigjg0+e82kpwzSwCI=
 github.com/hashicorp/go-rootcerts v1.0.0/go.mod h1:K6zTfqpRlCUIjkwsN4Z+hiSfzSTQa6eBIzfwKfwNnHU=
 github.com/hashicorp/go-sockaddr v0.0.0-20180320115054-6d291a969b86 h1:7YOlAIO2YWnJZkQp7B5eFykaIY7C9JndqAFQyVV5BhM=
 github.com/hashicorp/go-sockaddr v0.0.0-20180320115054-6d291a969b86/go.mod h1:7Xibr9yA9JjQq1JpNB2Vw7kxv8xerXegt+ozgdvDeDU=
@@ -227,6 +228,7 @@ github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNx
 github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
 github.com/mattn/go-sqlite3 v1.6.0 h1:TDwTWbeII+88Qy55nWlof0DclgAtI4LqGujkYMzmQII=
 github.com/mattn/go-sqlite3 v1.6.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
+github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK860o=
 github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
 github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
@@ -344,10 +346,12 @@ github.com/sourcegraph/annotate v0.0.0-20160123013949-f4cad6c6324d/go.mod h1:Udh
 github.com/sourcegraph/syntaxhighlight v0.0.0-20170531221838-bd320f5d308e/go.mod h1:HuIsMU8RRBOtsCgI77wP899iHVBQpCmg4ErYMZB+2IA=
 github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v0.0.0-20171231124224-87b1dfb5b2fa h1:ws/U/9eA/uVBX3BckIHVlYLtQLuWodrnpPBuL8Q0N1E=
 github.com/stretchr/testify v0.0.0-20171231124224-87b1dfb5b2fa/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
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 github.com/ugorji/go v1.1.2/go.mod h1:hnLbHMwcvSihnDhEfx2/BzKp2xb0Y+ErdfYcrs9tkJQ=
@@ -367,6 +371,7 @@ github.com/urfave/negroni v1.0.0/go.mod h1:Meg73S6kFm/4PpbYdq35yYWoCZ9mS/YSx+lKn
 github.com/xiang90/probing v0.0.0-20160813154853-07dd2e8dfe18 h1:MPPkRncZLN9Kh4MEFmbnK4h3BD7AUmskWv2+EeZJCCs=
 github.com/xiang90/probing v0.0.0-20160813154853-07dd2e8dfe18/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
+github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
 go.opencensus.io v0.19.0/go.mod h1:AYeH0+ZxYyghG8diqaaIq/9P3VgCCt5GF2ldCY4dkFg=
 go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1yOyC1qaOBpL57BhE=
@@ -380,11 +385,19 @@ golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnf
 golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2 h1:NwxKRvbkH5MsNkvOtPZi3/3kmI8CAzs3mtv+GLQMkNo=
 golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 h1:ObdrDkeb4kJdCP557AjRjq69pTHfNouLtWZG7j9rPN8=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
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+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
+golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225 h1:kNX+jCowfMYzvlSvJu5pQWEmyWFrBXJ3PBy10xKMXK8=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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@@ -399,6 +412,10 @@ golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd h1:HuTn7WObtcDo9uEEU7rEqL0jYthdXAmZ6PP+meazmaU=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200226121028-0de0cce0169b h1:0mm1VjtFUOIlE1SbDlwjYaDxZVDP2S5ou6y0gSgXHu8=
+golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181017192945-9dcd33a902f4/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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@@ -410,6 +427,8 @@ golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6Zh
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -421,7 +440,10 @@ golang.org/x/sys v0.0.0-20181029174526-d69651ed3497/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181122145206-62eef0e2fa9b/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181218192612-074acd46bca6/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190221075227-b4e8571b14e0/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2 h1:z99zHgr7hKfrUcX/KsoJk5FJfjTceCKIp96+biqP4To=
@@ -435,7 +457,15 @@ golang.org/x/tools v0.0.0-20181030000716-a0a13e073c7b/go.mod h1:n7NCudcB/nEzxVGm
 golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181122213734-04b5d21e00f1/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181219222714-6e267b5cc78e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190221000707-a754db16a40a h1:68oQQ3p+aWut8G2oFWwuybMBFSh6QQUcDUl/ZUyUpUc=
 golang.org/x/tools v0.0.0-20190221000707-a754db16a40a/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200321014904-268ba720d32c h1:Qp5jXmUCqMiVq4676uW7bY2oskIR1ivTboSMn8qgeX0=
+golang.org/x/tools v0.0.0-20200321014904-268ba720d32c/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/api v0.0.0-20180910000450-7ca32eb868bf/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.0.0-20181030000543-1d582fd0359e/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.0.0-20181220000619-583d854617af/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=

models/migrations.go

@@ -13,6 +13,10 @@ var (
  Name: "initial",
  Function: migrate0001,
  },
+ {
+ Name: "pkce",
+ Function: migrate0002,
+ },
  }
 )
 
@@ -107,3 +111,14 @@ func migrate0001(db *gorm.DB, name string) error {
 
  return nil
 }
+
+func migrate0002(db *gorm.DB, name string) error {
+ if err := db.AutoMigrate(&OauthClient{}).Error; err != nil {
+ return fmt.Errorf("Error migrating oauth_clients table: %s", err)
+ }
+ if err := db.AutoMigrate(&OauthAuthorizationCode{}).Error; err != nil {
+ return fmt.Errorf("Error migrating oauth_auth codes table: %s", err)
+ }
+
+ return nil
+}