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-rw-r--r--lib/public_key/src/pubkey_crypto.erl171
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diff --git a/lib/public_key/src/pubkey_crypto.erl b/lib/public_key/src/pubkey_crypto.erl
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-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2008-2010. All Rights Reserved.
-%%
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
-%%
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
-%%
-%% %CopyrightEnd%
-%%
-
-%%
-%% Description: Functions that call the crypto driver.
-
--module(pubkey_crypto).
-
--include("public_key.hrl").
-
--export([encrypt_public/3, decrypt_private/3,
- encrypt_private/3, decrypt_public/3,
- sign/2, sign/3, verify/5, gen_key/2]).
-
--define(UINT32(X), X:32/unsigned-big-integer).
-
-%%====================================================================
-%% Internal application API
-%%====================================================================
-
-%%--------------------------------------------------------------------
-%% Function: encrypt(PlainText, Key, Padding) -> Encrypted
-%%
-%% PlainText = binary()
-%% Key = rsa_public_key() | rsa_private_key()
-%% Padding = rsa_pkcs1_padding | rsa_pkcs1_oaep_padding
-%% Encrypted = binary()
-%%
-%% Description: Public key encrypts PlainText.
-%%--------------------------------------------------------------------
-encrypt_public(PlainText, #'RSAPublicKey'{modulus=N,publicExponent=E},
- Padding) ->
- crypto:rsa_public_encrypt(PlainText, [crypto:mpint(E),crypto:mpint(N)],
- Padding);
-encrypt_public(PlainText, #'RSAPrivateKey'{modulus=N,publicExponent=E},
- Padding) ->
- crypto:rsa_public_encrypt(PlainText, [crypto:mpint(E),crypto:mpint(N)],
- Padding).
-
-encrypt_private(PlainText, #'RSAPrivateKey'{modulus = N,
- publicExponent = E,
- privateExponent = D}, Padding) ->
- crypto:rsa_private_encrypt(PlainText, [crypto:mpint(E),
- crypto:mpint(N),
- crypto:mpint(D)], Padding).
-
-%%--------------------------------------------------------------------
-%% Function: decrypt(CipherText, Key) -> PlainText
-%%
-%% ChipherText = binary()
-%% Key = rsa_private_key()
-%% Padding = rsa_pkcs1_padding | rsa_pkcs1_oaep_padding
-%% PlainText = binary()
-%%
-%% Description: Uses private key to decrypt public key encrypted data.
-%%--------------------------------------------------------------------
-decrypt_private(CipherText,
- #'RSAPrivateKey'{modulus = N,publicExponent = E,
- privateExponent = D},
- Padding) ->
- crypto:rsa_private_decrypt(CipherText,
- [crypto:mpint(E), crypto:mpint(N),
- crypto:mpint(D)], Padding).
-decrypt_public(CipherText, #'RSAPublicKey'{modulus = N, publicExponent = E},
- Padding) ->
- crypto:rsa_public_decrypt(CipherText,[crypto:mpint(E), crypto:mpint(N)],
- Padding);
-decrypt_public(CipherText, #'RSAPrivateKey'{modulus = N, publicExponent = E},
- Padding) ->
- crypto:rsa_public_decrypt(CipherText,[crypto:mpint(E), crypto:mpint(N)],
- Padding).
-
-%%--------------------------------------------------------------------
-%% Function: sign(PlainText, Key) ->
-%% sign(DigestType, PlainText, Key) -> Signature
-%%
-%% DigestType = sha | md5
-%% PlainText = binary()
-%% Key = rsa_private_key() | dsa_private_key()
-%% Signature = binary()
-%%
-%% Description: Signs PlainText using Key.
-%%--------------------------------------------------------------------
-sign(PlainText, Digest) ->
- sign(sha, PlainText, Digest).
-
-sign(DigestType, PlainText, #'RSAPrivateKey'{modulus = N, publicExponent = E,
- privateExponent = D}) ->
- crypto:rsa_sign(DigestType, sized_binary(PlainText), [crypto:mpint(E),
- crypto:mpint(N),
- crypto:mpint(D)]);
-
-sign(none, Hash, #'DSAPrivateKey'{p = P, q = Q, g = G, x = X}) ->
- crypto:dss_sign(none, Hash,
- [crypto:mpint(P), crypto:mpint(Q),
- crypto:mpint(G), crypto:mpint(X)]);
-
-sign(sha, PlainText, #'DSAPrivateKey'{p = P, q = Q, g = G, x = X}) ->
- crypto:dss_sign(sized_binary(PlainText),
- [crypto:mpint(P), crypto:mpint(Q),
- crypto:mpint(G), crypto:mpint(X)]).
-
-%%--------------------------------------------------------------------
-%% Function: verify(DigestType, PlainText, Signature, Key) -> true | false
-%%
-%% DigestType = sha | md5
-%% PlainText = binary()
-%% Signature = binary()
-%% Key = rsa_public_key() | dsa_public_key()
-%%
-%% Description: Verifies the signature <Signature>.
-%%--------------------------------------------------------------------
-verify(DigestType, PlainText, Signature,
- #'RSAPublicKey'{modulus = Mod, publicExponent = Exp}, _) ->
- crypto:rsa_verify(DigestType,
- sized_binary(PlainText),
- sized_binary(Signature),
- [crypto:mpint(Exp), crypto:mpint(Mod)]);
-
-verify(none, Hash, Signature, Key, #'Dss-Parms'{p = P, q = Q, g = G}) ->
- crypto:dss_verify(none, Hash,
- sized_binary(Signature),
- [crypto:mpint(P), crypto:mpint(Q),
- crypto:mpint(G), crypto:mpint(Key)]);
-
-verify(sha, PlainText, Signature, Key, #'Dss-Parms'{p = P, q = Q, g = G}) ->
- crypto:dss_verify(sized_binary(PlainText),
- sized_binary(Signature),
- [crypto:mpint(P), crypto:mpint(Q),
- crypto:mpint(G), crypto:mpint(Key)]).
-
-
-%%--------------------------------------------------------------------
-%% Function: gen_key(Type, Params) ->
-%% Type = diffie_hellman
-%% Params = [P,G] | [Y, P, G]
-%% Description: Generates keys.
-%% -----------------------------------------------------------------
-gen_key(diffie_hellman, [Y, P, G]) ->
- crypto:dh_generate_key(crypto:mpint(Y), [crypto:mpint(P),
- crypto:mpint(G)]);
-gen_key(diffie_hellman, [P, G]) ->
- crypto:dh_generate_key([crypto:mpint(P), crypto:mpint(G)]).
-
-%%% TODO: Support rsa, dss key_gen
-
-%%--------------------------------------------------------------------
-%%% Internal functions
-%%--------------------------------------------------------------------
-sized_binary(Binary) when is_binary(Binary) ->
- Size = size(Binary),
- <<?UINT32(Size), Binary/binary>>;
-sized_binary(List) ->
- sized_binary(list_to_binary(List)).
-
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