From 6b99c8d9cff7b3e8ae8f3204b99e7ea40f791349 Mon Sep 17 00:00:00 2001 From: Yves-Alexis Perez Date: Sun, 25 Aug 2013 15:37:26 +0200 Subject: Imported Upstream version 5.1.0 --- src/libstrongswan/plugins/sshkey/Makefile.am | 17 + src/libstrongswan/plugins/sshkey/Makefile.in | 685 ++++++++++++++++++++++ src/libstrongswan/plugins/sshkey/sshkey_builder.c | 153 +++++ src/libstrongswan/plugins/sshkey/sshkey_builder.h | 51 ++ src/libstrongswan/plugins/sshkey/sshkey_plugin.c | 75 +++ src/libstrongswan/plugins/sshkey/sshkey_plugin.h | 42 ++ 6 files changed, 1023 insertions(+) create mode 100644 src/libstrongswan/plugins/sshkey/Makefile.am create mode 100644 src/libstrongswan/plugins/sshkey/Makefile.in create mode 100644 src/libstrongswan/plugins/sshkey/sshkey_builder.c create mode 100644 src/libstrongswan/plugins/sshkey/sshkey_builder.h create mode 100644 src/libstrongswan/plugins/sshkey/sshkey_plugin.c create mode 100644 src/libstrongswan/plugins/sshkey/sshkey_plugin.h (limited to 'src/libstrongswan/plugins/sshkey') diff --git a/src/libstrongswan/plugins/sshkey/Makefile.am b/src/libstrongswan/plugins/sshkey/Makefile.am new file mode 100644 index 000000000..d2ec631a8 --- /dev/null +++ b/src/libstrongswan/plugins/sshkey/Makefile.am @@ -0,0 +1,17 @@ +AM_CPPFLAGS = \ + -I$(top_srcdir)/src/libstrongswan + +AM_CFLAGS = \ + -rdynamic + +if MONOLITHIC +noinst_LTLIBRARIES = libstrongswan-sshkey.la +else +plugin_LTLIBRARIES = libstrongswan-sshkey.la +endif + +libstrongswan_sshkey_la_SOURCES = \ + sshkey_plugin.h sshkey_plugin.c \ + sshkey_builder.h sshkey_builder.c + +libstrongswan_sshkey_la_LDFLAGS = -module -avoid-version diff --git a/src/libstrongswan/plugins/sshkey/Makefile.in b/src/libstrongswan/plugins/sshkey/Makefile.in new file mode 100644 index 000000000..b7eeecc17 --- /dev/null +++ b/src/libstrongswan/plugins/sshkey/Makefile.in @@ -0,0 +1,685 @@ +# Makefile.in generated by automake 1.11.6 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 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uninstall-pluginLTLIBRARIES + + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/src/libstrongswan/plugins/sshkey/sshkey_builder.c b/src/libstrongswan/plugins/sshkey/sshkey_builder.c new file mode 100644 index 000000000..d6a7c645a --- /dev/null +++ b/src/libstrongswan/plugins/sshkey/sshkey_builder.c @@ -0,0 +1,153 @@ +/* + * Copyright (C) 2013 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 . + * + * 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 "sshkey_builder.h" + +#include +#include +#include +#include + +#define ECDSA_PREFIX "ecdsa-sha2-" + +/** + * Parse an EC domain parameter identifier as defined in RFC 5656 + */ +static chunk_t parse_ec_identifier(chunk_t identifier) +{ + chunk_t oid = chunk_empty; + + if (chunk_equals(identifier, chunk_from_str("nistp256"))) + { + oid = asn1_build_known_oid(OID_PRIME256V1); + } + else if (chunk_equals(identifier, chunk_from_str("nistp384"))) + { + oid = asn1_build_known_oid(OID_SECT384R1); + } + else if (chunk_equals(identifier, chunk_from_str("nistp521"))) + { + oid = asn1_build_known_oid(OID_SECT521R1); + } + else + { + char ascii[64]; + + if (snprintf(ascii, sizeof(ascii), "%.*s", (int)identifier.len, + identifier.ptr) < sizeof(ascii)) + { + oid = asn1_wrap(ASN1_OID, "m", asn1_oid_from_string(ascii)); + } + } + return oid; +} + +/** + * Load a generic public key from an SSH key blob + */ +static sshkey_public_key_t *parse_public_key(chunk_t blob) +{ + bio_reader_t *reader; + chunk_t format; + + reader = bio_reader_create(blob); + if (!reader->read_data32(reader, &format)) + { + DBG1(DBG_LIB, "invalid key format in SSH key"); + reader->destroy(reader); + return NULL; + } + if (chunk_equals(format, chunk_from_str("ssh-rsa"))) + { + chunk_t n, e; + + if (!reader->read_data32(reader, &e) || + !reader->read_data32(reader, &n)) + { + DBG1(DBG_LIB, "invalid RSA key in SSH key"); + reader->destroy(reader); + return NULL; + } + reader->destroy(reader); + return lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA, + BUILD_RSA_MODULUS, n, BUILD_RSA_PUB_EXP, e, BUILD_END); + } + else if (format.len > strlen(ECDSA_PREFIX) && + strpfx(format.ptr, ECDSA_PREFIX)) + { + chunk_t ec_blob, identifier, q, oid, encoded; + sshkey_public_key_t *key; + + ec_blob = reader->peek(reader); + reader->destroy(reader); + reader = bio_reader_create(ec_blob); + if (!reader->read_data32(reader, &identifier) || + !reader->read_data32(reader, &q)) + { + DBG1(DBG_LIB, "invalid ECDSA key in SSH key"); + reader->destroy(reader); + return NULL; + } + oid = parse_ec_identifier(identifier); + if (!oid.ptr) + { + DBG1(DBG_LIB, "invalid ECDSA key identifier in SSH key"); + reader->destroy(reader); + return NULL; + } + reader->destroy(reader); + /* build key from subjectPublicKeyInfo */ + encoded = asn1_wrap(ASN1_SEQUENCE, "mm", + asn1_wrap(ASN1_SEQUENCE, "mm", + asn1_build_known_oid(OID_EC_PUBLICKEY), oid), + asn1_bitstring("c", q)); + key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, + KEY_ECDSA, BUILD_BLOB_ASN1_DER, encoded, BUILD_END); + chunk_free(&encoded); + return key; + } + DBG1(DBG_LIB, "unsupported SSH key format %.*s", (int)format.len, + format.ptr); + reader->destroy(reader); + return NULL; +} + +/** + * See header. + */ +sshkey_public_key_t *sshkey_public_key_load(key_type_t type, va_list args) +{ + chunk_t blob = chunk_empty; + + while (TRUE) + { + switch (va_arg(args, builder_part_t)) + { + case BUILD_BLOB_SSHKEY: + blob = va_arg(args, chunk_t); + continue; + case BUILD_END: + break; + default: + return NULL; + } + break; + } + if (blob.ptr && type == KEY_ANY) + { + return parse_public_key(blob); + } + return NULL; +} diff --git a/src/libstrongswan/plugins/sshkey/sshkey_builder.h b/src/libstrongswan/plugins/sshkey/sshkey_builder.h new file mode 100644 index 000000000..e4c7a90d0 --- /dev/null +++ b/src/libstrongswan/plugins/sshkey/sshkey_builder.h @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2013 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 . + * + * 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 sshky_public_key sshky_public_key + * @{ @ingroup sshkey_p + */ + +#ifndef SSHKEY_BUILDER_H_ +#define SSHKEY_BUILDER_H_ + +#include +#include + +typedef struct sshkey_public_key_t sshkey_public_key_t; + +/** + * Public key implementation supporting RFC 4253 decoding. + */ +struct sshkey_public_key_t { + + /** + * Implements public_key_t interface. + */ + public_key_t interface; +}; + +/** + * Load a public key in RFC 4253 format. + * + * Takes a BUILD_BLOB_SSHKEY to parse the public key. + * + * @param type type of the key, must be KEY_ANY + * @param args builder_part_t argument list + * @return built key, NULL on failure + */ +sshkey_public_key_t *sshkey_public_key_load(key_type_t type, va_list args); + +#endif /** SSHKEY_BUILDER_H_ @}*/ diff --git a/src/libstrongswan/plugins/sshkey/sshkey_plugin.c b/src/libstrongswan/plugins/sshkey/sshkey_plugin.c new file mode 100644 index 000000000..fe6252671 --- /dev/null +++ b/src/libstrongswan/plugins/sshkey/sshkey_plugin.c @@ -0,0 +1,75 @@ +/* + * Copyright (C) 2013 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 . + * + * 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 "sshkey_plugin.h" + +#include +#include "sshkey_builder.h" + +typedef struct private_sshkey_plugin_t private_sshkey_plugin_t; + +/** + * private data of sshkey_plugin + */ +struct private_sshkey_plugin_t { + + /** + * public functions + */ + sshkey_plugin_t public; +}; + +METHOD(plugin_t, get_name, char*, + private_sshkey_plugin_t *this) +{ + return "sshkey"; +} + +METHOD(plugin_t, get_features, int, + private_sshkey_plugin_t *this, plugin_feature_t *features[]) +{ + static plugin_feature_t f[] = { + PLUGIN_REGISTER(PUBKEY, sshkey_public_key_load, FALSE), + PLUGIN_PROVIDE(PUBKEY, KEY_ANY), + }; + *features = f; + return countof(f); +} + +METHOD(plugin_t, destroy, void, + private_sshkey_plugin_t *this) +{ + free(this); +} + +/* + * see header file + */ +plugin_t *sshkey_plugin_create() +{ + private_sshkey_plugin_t *this; + + INIT(this, + .public = { + .plugin = { + .get_name = _get_name, + .get_features = _get_features, + .destroy = _destroy, + }, + }, + ); + + return &this->public.plugin; +} diff --git a/src/libstrongswan/plugins/sshkey/sshkey_plugin.h b/src/libstrongswan/plugins/sshkey/sshkey_plugin.h new file mode 100644 index 000000000..2b9095a98 --- /dev/null +++ b/src/libstrongswan/plugins/sshkey/sshkey_plugin.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2013 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 . + * + * 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 sshkey_p sshkey + * @ingroup plugins + * + * @defgroup sshkey_plugin sshkey_plugin + * @{ @ingroup sshkey_p + */ + +#ifndef SSHKEY_PLUGIN_H_ +#define SSHKEY_PLUGIN_H_ + +#include + +typedef struct sshkey_plugin_t sshkey_plugin_t; + +/** + * Plugin providing RFC 4253 public key decoding functions. + */ +struct sshkey_plugin_t { + + /** + * implements plugin interface + */ + plugin_t plugin; +}; + +#endif /** SSHKEY_PLUGIN_H_ @}*/ -- cgit v1.2.3