From 8138d70bb8c1de954c46b417ccd22964b6432965 Mon Sep 17 00:00:00 2001 From: Adam Kocoloski Date: Wed, 11 Aug 2010 15:34:41 -0400 Subject: move oauth to rebar layout --- apps/oauth/src/oauth.app.src | 20 +++++++ apps/oauth/src/oauth.erl | 107 +++++++++++++++++++++++++++++++++++++ apps/oauth/src/oauth_hmac_sha1.erl | 11 ++++ apps/oauth/src/oauth_http.erl | 22 ++++++++ apps/oauth/src/oauth_plaintext.erl | 10 ++++ apps/oauth/src/oauth_rsa_sha1.erl | 30 +++++++++++ apps/oauth/src/oauth_unix.erl | 16 ++++++ apps/oauth/src/oauth_uri.erl | 88 ++++++++++++++++++++++++++++++ 8 files changed, 304 insertions(+) create mode 100644 apps/oauth/src/oauth.app.src create mode 100644 apps/oauth/src/oauth.erl create mode 100644 apps/oauth/src/oauth_hmac_sha1.erl create mode 100644 apps/oauth/src/oauth_http.erl create mode 100644 apps/oauth/src/oauth_plaintext.erl create mode 100644 apps/oauth/src/oauth_rsa_sha1.erl create mode 100644 apps/oauth/src/oauth_unix.erl create mode 100644 apps/oauth/src/oauth_uri.erl (limited to 'apps/oauth/src') diff --git a/apps/oauth/src/oauth.app.src b/apps/oauth/src/oauth.app.src new file mode 100644 index 00000000..6357b9b0 --- /dev/null +++ b/apps/oauth/src/oauth.app.src @@ -0,0 +1,20 @@ +{application, oauth, [ + {description, "Erlang OAuth implementation"}, + {vsn, "dev"}, + {modules, [ + oauth, + oauth_hmac_sha1, + oauth_http, + oauth_plaintext, + oauth_rsa_sha1, + oauth_unix, + oauth_uri + ]}, + {registered, []}, + {applications, [ + kernel, + stdlib, + crypto, + inets + ]} +]}. diff --git a/apps/oauth/src/oauth.erl b/apps/oauth/src/oauth.erl new file mode 100644 index 00000000..866655c9 --- /dev/null +++ b/apps/oauth/src/oauth.erl @@ -0,0 +1,107 @@ +-module(oauth). + +-export( + [ get/5 + , header/1 + , post/5 + , signature/5 + , signature_base_string/3 + , signed_params/6 + , token/1 + , token_secret/1 + , uri/2 + , verify/6 + ]). + + +get(URL, ExtraParams, Consumer, Token, TokenSecret) -> + SignedParams = signed_params("GET", URL, ExtraParams, Consumer, Token, TokenSecret), + oauth_http:get(uri(URL, SignedParams)). + +post(URL, ExtraParams, Consumer, Token, TokenSecret) -> + SignedParams = signed_params("POST", URL, ExtraParams, Consumer, Token, TokenSecret), + oauth_http:post(URL, oauth_uri:params_to_string(SignedParams)). + +uri(Base, []) -> + Base; +uri(Base, Params) -> + lists:concat([Base, "?", oauth_uri:params_to_string(Params)]). + +header(Params) -> + {"Authorization", "OAuth " ++ oauth_uri:params_to_header_string(Params)}. + +token(Params) -> + proplists:get_value("oauth_token", Params). + +token_secret(Params) -> + proplists:get_value("oauth_token_secret", Params). + +verify(Signature, HttpMethod, URL, Params, Consumer, TokenSecret) -> + case signature_method(Consumer) of + plaintext -> + oauth_plaintext:verify(Signature, consumer_secret(Consumer), TokenSecret); + hmac_sha1 -> + BaseString = signature_base_string(HttpMethod, URL, Params), + oauth_hmac_sha1:verify(Signature, BaseString, consumer_secret(Consumer), TokenSecret); + rsa_sha1 -> + BaseString = signature_base_string(HttpMethod, URL, Params), + oauth_rsa_sha1:verify(Signature, BaseString, consumer_secret(Consumer)) + end. + +signed_params(HttpMethod, URL, ExtraParams, Consumer, Token, TokenSecret) -> + Params = token_param(Token, params(Consumer, ExtraParams)), + [{"oauth_signature", signature(HttpMethod, URL, Params, Consumer, TokenSecret)}|Params]. + +signature(HttpMethod, URL, Params, Consumer, TokenSecret) -> + case signature_method(Consumer) of + plaintext -> + oauth_plaintext:signature(consumer_secret(Consumer), TokenSecret); + hmac_sha1 -> + BaseString = signature_base_string(HttpMethod, URL, Params), + oauth_hmac_sha1:signature(BaseString, consumer_secret(Consumer), TokenSecret); + rsa_sha1 -> + BaseString = signature_base_string(HttpMethod, URL, Params), + oauth_rsa_sha1:signature(BaseString, consumer_secret(Consumer)) + end. + +signature_base_string(HttpMethod, URL, Params) -> + NormalizedURL = oauth_uri:normalize(URL), + NormalizedParams = oauth_uri:params_to_string(lists:sort(Params)), + oauth_uri:calate("&", [HttpMethod, NormalizedURL, NormalizedParams]). + +token_param("", Params) -> + Params; +token_param(Token, Params) -> + [{"oauth_token", Token}|Params]. + +params(Consumer, Params) -> + Nonce = base64:encode_to_string(crypto:rand_bytes(32)), % cf. ruby-oauth + params(Consumer, oauth_unix:timestamp(), Nonce, Params). + +params(Consumer, Timestamp, Nonce, Params) -> + [ {"oauth_version", "1.0"} + , {"oauth_nonce", Nonce} + , {"oauth_timestamp", integer_to_list(Timestamp)} + , {"oauth_signature_method", signature_method_string(Consumer)} + , {"oauth_consumer_key", consumer_key(Consumer)} + | Params + ]. + +signature_method_string(Consumer) -> + case signature_method(Consumer) of + plaintext -> + "PLAINTEXT"; + hmac_sha1 -> + "HMAC-SHA1"; + rsa_sha1 -> + "RSA-SHA1" + end. + +signature_method(_Consumer={_, _, Method}) -> + Method. + +consumer_secret(_Consumer={_, Secret, _}) -> + Secret. + +consumer_key(_Consumer={Key, _, _}) -> + Key. diff --git a/apps/oauth/src/oauth_hmac_sha1.erl b/apps/oauth/src/oauth_hmac_sha1.erl new file mode 100644 index 00000000..79d59f37 --- /dev/null +++ b/apps/oauth/src/oauth_hmac_sha1.erl @@ -0,0 +1,11 @@ +-module(oauth_hmac_sha1). + +-export([signature/3, verify/4]). + + +signature(BaseString, CS, TS) -> + Key = oauth_uri:calate("&", [CS, TS]), + base64:encode_to_string(crypto:sha_mac(Key, BaseString)). + +verify(Signature, BaseString, CS, TS) -> + couch_util:verify(signature(BaseString, CS, TS), Signature). diff --git a/apps/oauth/src/oauth_http.erl b/apps/oauth/src/oauth_http.erl new file mode 100644 index 00000000..bf5a4bac --- /dev/null +++ b/apps/oauth/src/oauth_http.erl @@ -0,0 +1,22 @@ +-module(oauth_http). + +-export([get/1, post/2, response_params/1, response_body/1, response_code/1]). + + +get(URL) -> + request(get, {URL, []}). + +post(URL, Data) -> + request(post, {URL, [], "application/x-www-form-urlencoded", Data}). + +request(Method, Request) -> + http:request(Method, Request, [{autoredirect, false}], []). + +response_params(Response) -> + oauth_uri:params_from_string(response_body(Response)). + +response_body({{_, _, _}, _, Body}) -> + Body. + +response_code({{_, Code, _}, _, _}) -> + Code. diff --git a/apps/oauth/src/oauth_plaintext.erl b/apps/oauth/src/oauth_plaintext.erl new file mode 100644 index 00000000..41a1e9b2 --- /dev/null +++ b/apps/oauth/src/oauth_plaintext.erl @@ -0,0 +1,10 @@ +-module(oauth_plaintext). + +-export([signature/2, verify/3]). + + +signature(CS, TS) -> + oauth_uri:calate("&", [CS, TS]). + +verify(Signature, CS, TS) -> + couch_util:verify(signature(CS, TS), Signature). diff --git a/apps/oauth/src/oauth_rsa_sha1.erl b/apps/oauth/src/oauth_rsa_sha1.erl new file mode 100644 index 00000000..6f4828e0 --- /dev/null +++ b/apps/oauth/src/oauth_rsa_sha1.erl @@ -0,0 +1,30 @@ +-module(oauth_rsa_sha1). + +-export([signature/2, verify/3]). + +-include_lib("public_key/include/public_key.hrl"). + + +signature(BaseString, PrivateKeyPath) -> + {ok, [Info]} = public_key:pem_to_der(PrivateKeyPath), + {ok, PrivateKey} = public_key:decode_private_key(Info), + base64:encode_to_string(public_key:sign(list_to_binary(BaseString), PrivateKey)). + +verify(Signature, BaseString, PublicKey) -> + public_key:verify_signature(to_binary(BaseString), sha, base64:decode(Signature), public_key(PublicKey)). + +to_binary(Term) when is_list(Term) -> + list_to_binary(Term); +to_binary(Term) when is_binary(Term) -> + Term. + +public_key(Path) when is_list(Path) -> + {ok, [{cert, DerCert, not_encrypted}]} = public_key:pem_to_der(Path), + {ok, Cert} = public_key:pkix_decode_cert(DerCert, otp), + public_key(Cert); +public_key(#'OTPCertificate'{tbsCertificate=Cert}) -> + public_key(Cert); +public_key(#'OTPTBSCertificate'{subjectPublicKeyInfo=Info}) -> + public_key(Info); +public_key(#'OTPSubjectPublicKeyInfo'{subjectPublicKey=Key}) -> + Key. diff --git a/apps/oauth/src/oauth_unix.erl b/apps/oauth/src/oauth_unix.erl new file mode 100644 index 00000000..73ca3143 --- /dev/null +++ b/apps/oauth/src/oauth_unix.erl @@ -0,0 +1,16 @@ +-module(oauth_unix). + +-export([timestamp/0]). + + +timestamp() -> + timestamp(calendar:universal_time()). + +timestamp(DateTime) -> + seconds(DateTime) - epoch(). + +epoch() -> + seconds({{1970,1,1},{00,00,00}}). + +seconds(DateTime) -> + calendar:datetime_to_gregorian_seconds(DateTime). diff --git a/apps/oauth/src/oauth_uri.erl b/apps/oauth/src/oauth_uri.erl new file mode 100644 index 00000000..fb27ae72 --- /dev/null +++ b/apps/oauth/src/oauth_uri.erl @@ -0,0 +1,88 @@ +-module(oauth_uri). + +-export([normalize/1, calate/2, encode/1]). +-export([params_from_string/1, params_to_string/1, + params_from_header_string/1, params_to_header_string/1]). + +-import(lists, [concat/1]). + +-define(is_uppercase_alpha(C), C >= $A, C =< $Z). +-define(is_lowercase_alpha(C), C >= $a, C =< $z). +-define(is_alpha(C), ?is_uppercase_alpha(C); ?is_lowercase_alpha(C)). +-define(is_digit(C), C >= $0, C =< $9). +-define(is_alphanumeric(C), ?is_alpha(C); ?is_digit(C)). +-define(is_unreserved(C), ?is_alphanumeric(C); C =:= $-; C =:= $_; C =:= $.; C =:= $~). +-define(is_hex(C), ?is_digit(C); C >= $A, C =< $F). + + +normalize(URI) -> + case http_uri:parse(URI) of + {Scheme, UserInfo, Host, Port, Path, _Query} -> + normalize(Scheme, UserInfo, string:to_lower(Host), Port, [Path]); + Else -> + Else + end. + +normalize(http, UserInfo, Host, 80, Acc) -> + normalize(http, UserInfo, [Host|Acc]); +normalize(https, UserInfo, Host, 443, Acc) -> + normalize(https, UserInfo, [Host|Acc]); +normalize(Scheme, UserInfo, Host, Port, Acc) -> + normalize(Scheme, UserInfo, [Host, ":", Port|Acc]). + +normalize(Scheme, [], Acc) -> + concat([Scheme, "://"|Acc]); +normalize(Scheme, UserInfo, Acc) -> + concat([Scheme, "://", UserInfo, "@"|Acc]). + +params_to_header_string(Params) -> + intercalate(", ", [concat([encode(K), "=\"", encode(V), "\""]) || {K, V} <- Params]). + +params_from_header_string(String) -> + [param_from_header_string(Param) || Param <- re:split(String, ",\\s*", [{return, list}]), Param =/= ""]. + +param_from_header_string(Param) -> + [Key, QuotedValue] = string:tokens(Param, "="), + Value = string:substr(QuotedValue, 2, length(QuotedValue) - 2), + {decode(Key), decode(Value)}. + +params_from_string(Params) -> + [param_from_string(Param) || Param <- string:tokens(Params, "&")]. + +param_from_string(Param) -> + list_to_tuple([decode(Value) || Value <- string:tokens(Param, "=")]). + +params_to_string(Params) -> + intercalate("&", [calate("=", [K, V]) || {K, V} <- Params]). + +calate(Sep, Xs) -> + intercalate(Sep, [encode(X) || X <- Xs]). + +intercalate(Sep, Xs) -> + concat(intersperse(Sep, Xs)). + +intersperse(_, []) -> []; +intersperse(_, [X]) -> [X]; +intersperse(Sep, [X|Xs]) -> + [X, Sep|intersperse(Sep, Xs)]. + +decode(Chars) -> + decode(Chars, []). + +decode([], Decoded) -> + lists:reverse(Decoded); +decode([$%,A,B|Etc], Decoded) when ?is_hex(A), ?is_hex(B) -> + decode(Etc, [erlang:list_to_integer([A,B], 16)|Decoded]); +decode([C|Etc], Decoded) when ?is_unreserved(C) -> + decode(Etc, [C|Decoded]). + +encode(Chars) -> + encode(Chars, []). + +encode([], Encoded) -> + lists:flatten(lists:reverse(Encoded)); +encode([C|Etc], Encoded) when ?is_unreserved(C) -> + encode(Etc, [C|Encoded]); +encode([C|Etc], Encoded) -> + Value = io_lib:format("%~2.1.0s", [erlang:integer_to_list(C, 16)]), + encode(Etc, [Value|Encoded]). -- cgit v1.2.3