bio/bio_reader.h bio/bio_reader.c bio/bio_writer.h bio/bio_writer.c \
crypto/crypters/crypter.c crypto/crypters/crypter.h \
crypto/hashers/hasher.h crypto/hashers/hasher.c \
+crypto/hmacs/hmac.h \
+crypto/hmacs/hmac_prf.h crypto/hmacs/hmac_prf.c \
+crypto/hmacs/hmac_signer.h crypto/hmacs/hmac_signer.c \
crypto/pkcs7.c crypto/pkcs7.h \
crypto/pkcs9.c crypto/pkcs9.h \
crypto/proposal/proposal_keywords.c crypto/proposal/proposal_keywords.h \
--- /dev/null
+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * Copyright (C) 2005-2008 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup hmac hmac
+ * @{ @ingroup crypto
+ */
+
+#ifndef HMAC_H_
+#define HMAC_H_
+
+typedef struct hmac_t hmac_t;
+
+#include <library.h>
+
+/**
+ * Generic interface for message authentication using hash functions.
+ *
+ * Classes implementing this interface can use the PRF and signer wrappers.
+ */
+struct hmac_t {
+
+ /**
+ * Generate message authentication code.
+ *
+ * If out is NULL, no result is given back. A next call will
+ * append the data to already supplied data. If out is not NULL,
+ * the mac of all apended data is calculated, written to out and the
+ * internal state is reset.
+ *
+ * @param data chunk of data to authenticate
+ * @param out pointer where the generated bytes will be written
+ */
+ void (*get_mac)(hmac_t *this, chunk_t data, u_int8_t *out);
+
+ /**
+ * Get the size of the resulting MAC (i.e. the output size of the
+ * underlying hash function).
+ *
+ * @return block size in bytes
+ */
+ size_t (*get_mac_size)(hmac_t *this);
+
+ /**
+ * Set the key to be used for the HMAC.
+ *
+ * Any key length must be accepted.
+ *
+ * @param key key to set
+ */
+ void (*set_key) (hmac_t *this, chunk_t key);
+
+ /**
+ * Destroys a hmac_t object.
+ */
+ void (*destroy) (hmac_t *this);
+};
+
+#endif /** HMAC_H_ @}*/
--- /dev/null
+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "hmac_prf.h"
+
+typedef struct private_prf_t private_prf_t;
+
+/**
+ * Private data of a hmac_prf_t object.
+ */
+struct private_prf_t {
+
+ /**
+ * Public interface
+ */
+ prf_t public;
+
+ /**
+ * HMAC to use
+ */
+ hmac_t *hmac;
+};
+
+METHOD(prf_t, get_bytes, void,
+ private_prf_t *this, chunk_t seed, u_int8_t *buffer)
+{
+ this->hmac->get_mac(this->hmac, seed, buffer);
+}
+
+METHOD(prf_t, allocate_bytes, void,
+ private_prf_t *this, chunk_t seed, chunk_t *chunk)
+{
+ if (!chunk)
+ {
+ this->hmac->get_mac(this->hmac, seed, NULL);
+ }
+ else
+ {
+ *chunk = chunk_alloc(this->hmac->get_mac_size(this->hmac));
+ this->hmac->get_mac(this->hmac, seed, chunk->ptr);
+ }
+}
+
+METHOD(prf_t, get_block_size, size_t,
+ private_prf_t *this)
+{
+ return this->hmac->get_mac_size(this->hmac);
+}
+
+METHOD(prf_t, get_key_size, size_t,
+ private_prf_t *this)
+{
+ /* for HMAC PRFs, IKEv2 uses MAC size as key size */
+ return this->hmac->get_mac_size(this->hmac);
+}
+
+METHOD(prf_t, set_key, void,
+ private_prf_t *this, chunk_t key)
+{
+ this->hmac->set_key(this->hmac, key);
+}
+
+METHOD(prf_t, destroy, void,
+ private_prf_t *this)
+{
+ this->hmac->destroy(this->hmac);
+ free(this);
+}
+
+/*
+ * Described in header.
+ */
+prf_t *hmac_prf_create(hmac_t *hmac)
+{
+ private_prf_t *this;
+
+ INIT(this,
+ .public = {
+ .get_bytes = _get_bytes,
+ .allocate_bytes = _allocate_bytes,
+ .get_block_size = _get_block_size,
+ .get_key_size = _get_key_size,
+ .set_key = _set_key,
+ .destroy = _destroy,
+ },
+ .hmac = hmac,
+ );
+
+ return &this->public;
+}
--- /dev/null
+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup hmac_prf hmac_prf
+ * @{ @ingroup hmac
+ */
+
+#ifndef HMAC_PRF_H_
+#define HMAC_PRF_H_
+
+#include <crypto/prfs/prf.h>
+#include <crypto/hmacs/hmac.h>
+
+/**
+ * Creates an implementation of the prf_t interface using the provided hmac_t
+ * implementation. Basically a simple wrapper to map the interface.
+ *
+ * @param hmac hmac_t implementation
+ * @return prf_t object
+ */
+prf_t *hmac_prf_create(hmac_t *hmac);
+
+#endif /** HMAC_PRF_H_ @}*/
--- /dev/null
+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * Copyright (C) 2005-2008 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "hmac_signer.h"
+
+typedef struct private_signer_t private_signer_t;
+
+/**
+ * Private data of a hmac_signer_t object.
+ */
+struct private_signer_t {
+
+ /**
+ * Public interface
+ */
+ signer_t public;
+
+ /**
+ * HMAC to use
+ */
+ hmac_t *hmac;
+
+ /**
+ * Truncation of HMAC output
+ */
+ size_t truncation;
+};
+
+METHOD(signer_t, get_signature, void,
+ private_signer_t *this, chunk_t data, u_int8_t *buffer)
+{
+ if (buffer == NULL)
+ {
+ this->hmac->get_mac(this->hmac, data, NULL);
+ }
+ else
+ {
+ u_int8_t mac[this->hmac->get_mac_size(this->hmac)];
+
+ this->hmac->get_mac(this->hmac, data, mac);
+ memcpy(buffer, mac, this->truncation);
+ }
+}
+
+METHOD(signer_t, allocate_signature, void,
+ private_signer_t *this, chunk_t data, chunk_t *chunk)
+{
+ if (chunk == NULL)
+ {
+ this->hmac->get_mac(this->hmac, data, NULL);
+ }
+ else
+ {
+ u_int8_t mac[this->hmac->get_mac_size(this->hmac)];
+
+ this->hmac->get_mac(this->hmac, data, mac);
+
+ *chunk = chunk_alloc(this->truncation);
+ memcpy(chunk->ptr, mac, this->truncation);
+ }
+}
+
+METHOD(signer_t, verify_signature, bool,
+ private_signer_t *this, chunk_t data, chunk_t signature)
+{
+ u_int8_t mac[this->hmac->get_mac_size(this->hmac)];
+
+ if (signature.len != this->truncation)
+ {
+ return FALSE;
+ }
+ this->hmac->get_mac(this->hmac, data, mac);
+ return memeq(signature.ptr, mac, this->truncation);
+}
+
+METHOD(signer_t, get_key_size, size_t,
+ private_signer_t *this)
+{
+ return this->hmac->get_mac_size(this->hmac);
+}
+
+METHOD(signer_t, get_block_size, size_t,
+ private_signer_t *this)
+{
+ return this->truncation;
+}
+
+METHOD(signer_t, set_key, void,
+ private_signer_t *this, chunk_t key)
+{
+ this->hmac->set_key(this->hmac, key);
+}
+
+METHOD(signer_t, destroy, void,
+ private_signer_t *this)
+{
+ this->hmac->destroy(this->hmac);
+ free(this);
+}
+
+/*
+ * Described in header
+ */
+signer_t *hmac_signer_create(hmac_t *hmac, size_t len)
+{
+ private_signer_t *this;
+
+ INIT(this,
+ .public = {
+ .get_signature = _get_signature,
+ .allocate_signature = _allocate_signature,
+ .verify_signature = _verify_signature,
+ .get_block_size = _get_block_size,
+ .get_key_size = _get_key_size,
+ .set_key = _set_key,
+ .destroy = _destroy,
+ },
+ .truncation = min(len, hmac->get_mac_size(hmac)),
+ .hmac = hmac,
+ );
+
+ return &this->public;
+}
+
--- /dev/null
+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup hmac_signer hmac_signer
+ * @{ @ingroup hmac
+ */
+
+#ifndef HMAC_SIGNER_H_
+#define HMAC_SIGNER_H_
+
+typedef struct hmac_signer_t hmac_signer_t;
+
+#include <crypto/hmacs/hmac.h>
+#include <crypto/signers/signer.h>
+
+/**
+ * Creates an implementation of the signer_t interface using the provided hmac_t
+ * implementation and truncation length.
+ *
+ * @note len will be set to hmac_t.get_mac_size() if it is greater than that.
+ *
+ * @param hmac hmac_t implementation
+ * @param len length of resulting signature
+ * @return hmac_signer_t
+ */
+signer_t *hmac_signer_create(hmac_t *hmac, size_t len);
+
+#endif /** HMAC_SIGNER_H_ @}*/
projects / thirdparty / strongswan.git / commitdiff
