2003-07-23 12:12:24 -04:00
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/*
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* 'OpenSSL for Ruby' project
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* Copyright (C) 2001-2002 Michal Rokos <m.rokos@sh.cvut.cz>
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* All rights reserved.
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*/
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/*
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2015-04-19 23:55:09 -04:00
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* This program is licensed under the same licence as Ruby.
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2003-07-23 12:12:24 -04:00
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* (See the file 'LICENCE'.)
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*/
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#if !defined(OPENSSL_NO_HMAC)
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#include "ossl.h"
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2016-06-05 11:35:12 -04:00
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#define NewHMAC(klass) \
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TypedData_Wrap_Struct((klass), &ossl_hmac_type, 0)
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2003-07-23 12:12:24 -04:00
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#define GetHMAC(obj, ctx) do { \
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2014-12-12 16:57:56 -05:00
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TypedData_Get_Struct((obj), HMAC_CTX, &ossl_hmac_type, (ctx)); \
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2011-02-24 09:03:34 -05:00
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if (!(ctx)) { \
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2003-07-23 12:12:24 -04:00
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ossl_raise(rb_eRuntimeError, "HMAC wasn't initialized"); \
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} \
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} while (0)
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/*
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* Classes
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*/
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VALUE cHMAC;
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VALUE eHMACError;
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/*
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* Public
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*/
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/*
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* Private
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*/
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static void
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2014-12-12 16:57:56 -05:00
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ossl_hmac_free(void *ctx)
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2003-07-23 12:12:24 -04:00
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{
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2016-06-05 11:35:12 -04:00
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HMAC_CTX_free(ctx);
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2003-07-23 12:12:24 -04:00
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}
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2014-12-12 16:57:56 -05:00
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static const rb_data_type_t ossl_hmac_type = {
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"OpenSSL/HMAC",
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{
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0, ossl_hmac_free,
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},
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0, 0, RUBY_TYPED_FREE_IMMEDIATELY,
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};
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2003-07-23 12:12:24 -04:00
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static VALUE
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ossl_hmac_alloc(VALUE klass)
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{
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VALUE obj;
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2016-06-05 11:35:12 -04:00
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HMAC_CTX *ctx;
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2003-07-23 12:12:24 -04:00
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2016-06-05 11:35:12 -04:00
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obj = NewHMAC(klass);
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ctx = HMAC_CTX_new();
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if (!ctx)
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ossl_raise(eHMACError, NULL);
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RTYPEDDATA_DATA(obj) = ctx;
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2010-04-22 04:21:01 -04:00
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2003-07-23 12:12:24 -04:00
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return obj;
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}
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2007-03-29 13:29:03 -04:00
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/*
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* call-seq:
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* HMAC.new(key, digest) -> hmac
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*
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2013-08-06 19:32:42 -04:00
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* Returns an instance of OpenSSL::HMAC set with the key and digest
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* algorithm to be used. The instance represents the initial state of
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* the message authentication code before any data has been processed.
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* To process data with it, use the instance method #update with your
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* data as an argument.
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*
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* === Example
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*
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* key = 'key'
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* digest = OpenSSL::Digest.new('sha1')
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* instance = OpenSSL::HMAC.new(key, digest)
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* #=> f42bb0eeb018ebbd4597ae7213711ec60760843f
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* instance.class
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* #=> OpenSSL::HMAC
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*
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* === A note about comparisons
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*
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2020-02-16 01:21:29 -05:00
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* Two instances can be securely compared with #== in constant time:
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2013-08-06 19:32:42 -04:00
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*
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* other_instance = OpenSSL::HMAC.new('key', OpenSSL::Digest.new('sha1'))
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2020-02-16 01:21:29 -05:00
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* #=> f42bb0eeb018ebbd4597ae7213711ec60760843f
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* instance == other_instance
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* #=> true
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2013-08-06 19:32:42 -04:00
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*
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2007-03-29 13:29:03 -04:00
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*/
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2003-07-23 12:12:24 -04:00
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static VALUE
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ossl_hmac_initialize(VALUE self, VALUE key, VALUE digest)
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{
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HMAC_CTX *ctx;
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StringValue(key);
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2004-12-15 01:35:55 -05:00
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GetHMAC(self, ctx);
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2016-06-05 11:35:12 -04:00
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HMAC_Init_ex(ctx, RSTRING_PTR(key), RSTRING_LENINT(key),
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2017-09-03 08:35:27 -04:00
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ossl_evp_get_digestbyname(digest), NULL);
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2003-07-23 12:12:24 -04:00
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return self;
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}
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static VALUE
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ossl_hmac_copy(VALUE self, VALUE other)
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{
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HMAC_CTX *ctx1, *ctx2;
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2010-04-22 04:04:13 -04:00
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2003-07-23 12:12:24 -04:00
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rb_check_frozen(self);
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if (self == other) return self;
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GetHMAC(self, ctx1);
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2017-09-03 08:35:27 -04:00
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GetHMAC(other, ctx2);
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2003-07-23 12:12:24 -04:00
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2016-06-05 11:35:12 -04:00
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if (!HMAC_CTX_copy(ctx1, ctx2))
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ossl_raise(eHMACError, "HMAC_CTX_copy");
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2003-07-23 12:12:24 -04:00
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return self;
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}
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2007-03-29 13:29:03 -04:00
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/*
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* call-seq:
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* hmac.update(string) -> self
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*
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2017-09-03 08:35:27 -04:00
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* Returns _hmac_ updated with the message to be authenticated.
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2013-08-06 19:32:42 -04:00
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* Can be called repeatedly with chunks of the message.
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*
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* === Example
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*
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* first_chunk = 'The quick brown fox jumps '
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* second_chunk = 'over the lazy dog'
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*
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* instance.update(first_chunk)
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* #=> 5b9a8038a65d571076d97fe783989e52278a492a
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* instance.update(second_chunk)
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* #=> de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9
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*
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2007-03-29 13:29:03 -04:00
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*/
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2003-07-23 12:12:24 -04:00
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static VALUE
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ossl_hmac_update(VALUE self, VALUE data)
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{
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HMAC_CTX *ctx;
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StringValue(data);
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2004-12-15 01:35:55 -05:00
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GetHMAC(self, ctx);
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2008-07-22 11:34:23 -04:00
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HMAC_Update(ctx, (unsigned char *)RSTRING_PTR(data), RSTRING_LEN(data));
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2003-07-23 12:12:24 -04:00
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return self;
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}
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static void
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2016-08-29 01:47:09 -04:00
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hmac_final(HMAC_CTX *ctx, unsigned char *buf, unsigned int *buf_len)
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2003-07-23 12:12:24 -04:00
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{
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2016-06-05 11:35:12 -04:00
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HMAC_CTX *final;
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final = HMAC_CTX_new();
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if (!final)
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ossl_raise(eHMACError, "HMAC_CTX_new");
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if (!HMAC_CTX_copy(final, ctx)) {
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HMAC_CTX_free(final);
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ossl_raise(eHMACError, "HMAC_CTX_copy");
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}
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2003-07-23 12:12:24 -04:00
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2016-08-29 01:47:09 -04:00
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HMAC_Final(final, buf, buf_len);
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2016-06-05 11:35:12 -04:00
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HMAC_CTX_free(final);
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2003-07-23 12:12:24 -04:00
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}
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2007-03-29 13:29:03 -04:00
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/*
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* call-seq:
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2013-08-06 19:32:42 -04:00
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* hmac.digest -> string
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*
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* Returns the authentication code an instance represents as a binary string.
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*
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* === Example
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2016-08-29 01:47:09 -04:00
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* instance = OpenSSL::HMAC.new('key', OpenSSL::Digest.new('sha1'))
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* #=> f42bb0eeb018ebbd4597ae7213711ec60760843f
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* instance.digest
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* #=> "\xF4+\xB0\xEE\xB0\x18\xEB\xBDE\x97\xAEr\x13q\x1E\xC6\a`\x84?"
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2007-03-29 13:29:03 -04:00
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*/
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2003-07-23 12:12:24 -04:00
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static VALUE
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2010-02-23 12:33:39 -05:00
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ossl_hmac_digest(VALUE self)
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2003-07-23 12:12:24 -04:00
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{
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HMAC_CTX *ctx;
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2008-07-22 11:34:23 -04:00
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unsigned int buf_len;
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2016-08-29 01:47:09 -04:00
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VALUE ret;
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2010-04-22 04:21:01 -04:00
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2003-07-23 12:12:24 -04:00
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GetHMAC(self, ctx);
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2016-08-29 01:47:09 -04:00
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ret = rb_str_new(NULL, EVP_MAX_MD_SIZE);
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hmac_final(ctx, (unsigned char *)RSTRING_PTR(ret), &buf_len);
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assert(buf_len <= EVP_MAX_MD_SIZE);
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rb_str_set_len(ret, buf_len);
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2010-04-22 04:04:13 -04:00
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2016-08-29 01:47:09 -04:00
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return ret;
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2003-07-23 12:12:24 -04:00
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}
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2007-03-29 13:29:03 -04:00
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/*
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* call-seq:
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2013-08-06 19:32:42 -04:00
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* hmac.hexdigest -> string
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*
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* Returns the authentication code an instance represents as a hex-encoded
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* string.
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2007-03-29 13:29:03 -04:00
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*/
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2003-07-23 12:12:24 -04:00
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static VALUE
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2010-02-23 12:33:39 -05:00
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ossl_hmac_hexdigest(VALUE self)
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2003-07-23 12:12:24 -04:00
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{
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HMAC_CTX *ctx;
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2016-08-29 01:47:09 -04:00
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unsigned char buf[EVP_MAX_MD_SIZE];
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2010-02-23 12:33:39 -05:00
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unsigned int buf_len;
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2016-08-29 01:47:09 -04:00
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VALUE ret;
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2010-04-22 04:21:01 -04:00
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2003-07-23 12:12:24 -04:00
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GetHMAC(self, ctx);
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2016-08-29 01:47:09 -04:00
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hmac_final(ctx, buf, &buf_len);
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ret = rb_str_new(NULL, buf_len * 2);
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ossl_bin2hex(buf, RSTRING_PTR(ret), buf_len);
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2003-07-23 12:12:24 -04:00
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2016-08-29 01:47:09 -04:00
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return ret;
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2003-07-23 12:12:24 -04:00
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}
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2007-04-02 15:00:23 -04:00
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/*
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* call-seq:
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2010-02-23 12:33:39 -05:00
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* hmac.reset -> self
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2007-04-02 15:00:23 -04:00
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*
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2017-09-03 08:35:27 -04:00
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* Returns _hmac_ as it was when it was first initialized, with all processed
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2013-08-06 19:32:42 -04:00
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* data cleared from it.
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*
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* === Example
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*
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* data = "The quick brown fox jumps over the lazy dog"
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* instance = OpenSSL::HMAC.new('key', OpenSSL::Digest.new('sha1'))
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* #=> f42bb0eeb018ebbd4597ae7213711ec60760843f
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*
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* instance.update(data)
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* #=> de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9
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* instance.reset
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* #=> f42bb0eeb018ebbd4597ae7213711ec60760843f
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*
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2007-04-02 15:00:23 -04:00
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*/
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static VALUE
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2010-02-23 12:33:39 -05:00
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ossl_hmac_reset(VALUE self)
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2007-04-02 15:00:23 -04:00
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{
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HMAC_CTX *ctx;
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GetHMAC(self, ctx);
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2016-06-05 11:35:12 -04:00
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HMAC_Init_ex(ctx, NULL, 0, NULL, NULL);
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2007-04-02 15:00:23 -04:00
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2010-02-23 12:33:39 -05:00
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return self;
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2007-04-02 15:00:23 -04:00
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}
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2007-03-29 13:29:03 -04:00
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/*
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* call-seq:
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2010-02-23 12:33:39 -05:00
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* HMAC.digest(digest, key, data) -> aString
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2007-03-29 13:29:03 -04:00
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*
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2017-09-03 08:35:27 -04:00
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* Returns the authentication code as a binary string. The _digest_ parameter
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* specifies the digest algorithm to use. This may be a String representing
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* the algorithm name or an instance of OpenSSL::Digest.
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2013-08-06 19:32:42 -04:00
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*
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* === Example
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*
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* key = 'key'
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* data = 'The quick brown fox jumps over the lazy dog'
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*
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2017-09-03 08:35:27 -04:00
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* hmac = OpenSSL::HMAC.digest('sha1', key, data)
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2013-08-06 19:32:42 -04:00
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* #=> "\xDE|\x9B\x85\xB8\xB7\x8A\xA6\xBC\x8Az6\xF7\n\x90p\x1C\x9D\xB4\xD9"
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*
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2007-03-29 13:29:03 -04:00
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*/
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2003-07-23 12:12:24 -04:00
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static VALUE
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2010-02-23 12:33:39 -05:00
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ossl_hmac_s_digest(VALUE klass, VALUE digest, VALUE key, VALUE data)
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2003-07-23 12:12:24 -04:00
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{
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2010-02-23 12:33:39 -05:00
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unsigned char *buf;
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unsigned int buf_len;
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2010-04-22 04:21:01 -04:00
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2010-02-23 12:33:39 -05:00
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StringValue(key);
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StringValue(data);
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2017-09-03 08:35:27 -04:00
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buf = HMAC(ossl_evp_get_digestbyname(digest), RSTRING_PTR(key),
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RSTRING_LENINT(key), (unsigned char *)RSTRING_PTR(data),
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RSTRING_LEN(data), NULL, &buf_len);
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2010-02-23 10:52:19 -05:00
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2010-02-23 12:33:39 -05:00
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return rb_str_new((const char *)buf, buf_len);
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2003-07-23 12:12:24 -04:00
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}
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2007-03-29 13:29:03 -04:00
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/*
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* call-seq:
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2013-04-15 22:24:09 -04:00
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* HMAC.hexdigest(digest, key, data) -> aString
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2007-03-29 13:29:03 -04:00
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*
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2017-09-03 08:35:27 -04:00
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* Returns the authentication code as a hex-encoded string. The _digest_
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* parameter specifies the digest algorithm to use. This may be a String
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* representing the algorithm name or an instance of OpenSSL::Digest.
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2013-08-06 19:32:42 -04:00
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*
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* === Example
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*
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* key = 'key'
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* data = 'The quick brown fox jumps over the lazy dog'
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*
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2017-09-03 08:35:27 -04:00
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* hmac = OpenSSL::HMAC.hexdigest('sha1', key, data)
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2013-08-06 19:32:42 -04:00
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* #=> "de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9"
|
|
|
|
*
|
2007-03-29 13:29:03 -04:00
|
|
|
*/
|
2003-07-23 12:12:24 -04:00
|
|
|
static VALUE
|
2010-02-23 12:33:39 -05:00
|
|
|
ossl_hmac_s_hexdigest(VALUE klass, VALUE digest, VALUE key, VALUE data)
|
2003-07-23 12:12:24 -04:00
|
|
|
{
|
2016-08-29 01:47:09 -04:00
|
|
|
unsigned char buf[EVP_MAX_MD_SIZE];
|
2008-07-22 11:34:23 -04:00
|
|
|
unsigned int buf_len;
|
2016-08-29 01:47:09 -04:00
|
|
|
VALUE ret;
|
2003-07-23 12:12:24 -04:00
|
|
|
|
|
|
|
StringValue(key);
|
|
|
|
StringValue(data);
|
2010-04-22 04:21:01 -04:00
|
|
|
|
2017-09-03 08:35:27 -04:00
|
|
|
if (!HMAC(ossl_evp_get_digestbyname(digest), RSTRING_PTR(key),
|
|
|
|
RSTRING_LENINT(key), (unsigned char *)RSTRING_PTR(data),
|
|
|
|
RSTRING_LEN(data), buf, &buf_len))
|
2016-08-29 01:47:09 -04:00
|
|
|
ossl_raise(eHMACError, "HMAC");
|
|
|
|
|
|
|
|
ret = rb_str_new(NULL, buf_len * 2);
|
|
|
|
ossl_bin2hex(buf, RSTRING_PTR(ret), buf_len);
|
2003-09-17 05:05:02 -04:00
|
|
|
|
2016-08-29 01:47:09 -04:00
|
|
|
return ret;
|
2003-07-23 12:12:24 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* INIT
|
|
|
|
*/
|
|
|
|
void
|
2014-09-30 01:25:32 -04:00
|
|
|
Init_ossl_hmac(void)
|
2003-07-23 12:12:24 -04:00
|
|
|
{
|
2010-12-05 19:54:44 -05:00
|
|
|
#if 0
|
2016-08-29 01:47:09 -04:00
|
|
|
mOSSL = rb_define_module("OpenSSL");
|
|
|
|
eOSSLError = rb_define_class_under(mOSSL, "OpenSSLError", rb_eStandardError);
|
2007-03-11 22:01:19 -04:00
|
|
|
#endif
|
|
|
|
|
2016-08-29 01:47:09 -04:00
|
|
|
/*
|
|
|
|
* Document-class: OpenSSL::HMAC
|
|
|
|
*
|
|
|
|
* OpenSSL::HMAC allows computing Hash-based Message Authentication Code
|
|
|
|
* (HMAC). It is a type of message authentication code (MAC) involving a
|
|
|
|
* hash function in combination with a key. HMAC can be used to verify the
|
|
|
|
* integrity of a message as well as the authenticity.
|
|
|
|
*
|
|
|
|
* OpenSSL::HMAC has a similar interface to OpenSSL::Digest.
|
|
|
|
*
|
|
|
|
* === HMAC-SHA256 using one-shot interface
|
|
|
|
*
|
|
|
|
* key = "key"
|
|
|
|
* data = "message-to-be-authenticated"
|
|
|
|
* mac = OpenSSL::HMAC.hexdigest("SHA256", key, data)
|
|
|
|
* #=> "cddb0db23f469c8bf072b21fd837149bd6ace9ab771cceef14c9e517cc93282e"
|
|
|
|
*
|
|
|
|
* === HMAC-SHA256 using incremental interface
|
|
|
|
*
|
|
|
|
* data1 = File.read("file1")
|
|
|
|
* data2 = File.read("file2")
|
|
|
|
* key = "key"
|
2020-04-19 11:14:36 -04:00
|
|
|
* digest = OpenSSL::Digest.new('SHA256')
|
2016-08-29 01:47:09 -04:00
|
|
|
* hmac = OpenSSL::HMAC.new(key, digest)
|
|
|
|
* hmac << data1
|
|
|
|
* hmac << data2
|
|
|
|
* mac = hmac.digest
|
|
|
|
*/
|
2003-07-23 12:12:24 -04:00
|
|
|
eHMACError = rb_define_class_under(mOSSL, "HMACError", eOSSLError);
|
2010-04-22 04:21:01 -04:00
|
|
|
|
2010-02-23 12:33:39 -05:00
|
|
|
cHMAC = rb_define_class_under(mOSSL, "HMAC", rb_cObject);
|
2003-07-23 12:12:24 -04:00
|
|
|
|
|
|
|
rb_define_alloc_func(cHMAC, ossl_hmac_alloc);
|
|
|
|
rb_define_singleton_method(cHMAC, "digest", ossl_hmac_s_digest, 3);
|
2010-02-23 12:33:39 -05:00
|
|
|
rb_define_singleton_method(cHMAC, "hexdigest", ossl_hmac_s_hexdigest, 3);
|
2010-04-22 04:04:13 -04:00
|
|
|
|
2003-07-23 12:12:24 -04:00
|
|
|
rb_define_method(cHMAC, "initialize", ossl_hmac_initialize, 2);
|
2017-09-03 08:35:27 -04:00
|
|
|
rb_define_method(cHMAC, "initialize_copy", ossl_hmac_copy, 1);
|
2003-07-23 12:12:24 -04:00
|
|
|
|
2007-04-02 15:00:23 -04:00
|
|
|
rb_define_method(cHMAC, "reset", ossl_hmac_reset, 0);
|
2003-07-23 12:12:24 -04:00
|
|
|
rb_define_method(cHMAC, "update", ossl_hmac_update, 1);
|
|
|
|
rb_define_alias(cHMAC, "<<", "update");
|
2010-02-23 12:33:39 -05:00
|
|
|
rb_define_method(cHMAC, "digest", ossl_hmac_digest, 0);
|
|
|
|
rb_define_method(cHMAC, "hexdigest", ossl_hmac_hexdigest, 0);
|
|
|
|
rb_define_alias(cHMAC, "inspect", "hexdigest");
|
|
|
|
rb_define_alias(cHMAC, "to_s", "hexdigest");
|
2003-07-23 12:12:24 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
#else /* NO_HMAC */
|
|
|
|
# warning >>> OpenSSL is compiled without HMAC support <<<
|
|
|
|
void
|
2014-09-30 01:25:32 -04:00
|
|
|
Init_ossl_hmac(void)
|
2003-07-23 12:12:24 -04:00
|
|
|
{
|
2014-07-27 15:37:10 -04:00
|
|
|
rb_warning("HMAC is not available: OpenSSL is compiled without HMAC.");
|
2003-07-23 12:12:24 -04:00
|
|
|
}
|
|
|
|
#endif /* NO_HMAC */
|