Moved generic PGP parsing functions to pgp_utils.[ch]

1 files changed, 130 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/pgp/pgp_utils.h b/src/libstrongswan/plugins/pgp/pgp_utils.h
new file mode 100644
index 000000000..93c51c44b
--- /dev/null
+++ b/src/libstrongswan/plugins/pgp/pgp_utils.h
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2009 Martin Willi
+ * 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 pgp_utils pgp_utils
+ * @{ @ingroup pgp
+ */
+
+#ifndef PGP_UTILS_H_
+#define PGP_UTILS_H_
+
+#include <library.h>
+
+typedef enum pgp_pubkey_alg_t pgp_pubkey_alg_t;
+typedef enum pgp_sym_alg_t pgp_sym_alg_t;
+typedef enum pgp_packet_tag_t pgp_packet_tag_t;
+
+/**
+ * OpenPGP public key algorithms as defined in section 9.1 of RFC 4880
+ */
+enum pgp_pubkey_alg_t {
+	PGP_PUBKEY_ALG_RSA              =  1,
+	PGP_PUBKEY_ALG_RSA_ENC_ONLY     =  2,
+	PGP_PUBKEY_ALG_RSA_SIGN_ONLY    =  3,
+	PGP_PUBKEY_ALG_ELGAMAL_ENC_ONLY = 16,
+	PGP_PUBKEY_ALG_DSA              = 17,
+	PGP_PUBKEY_ALG_ECC              = 18,
+	PGP_PUBKEY_ALG_ECDSA            = 19,
+	PGP_PUBKEY_ALG_ELGAMAL          = 20,
+	PGP_PUBKEY_ALG_DIFFIE_HELLMAN   = 21,
+};
+
+/**
+ * Enum names of pgp_pubkey_alg_t
+ */
+extern enum_name_t *pgp_pubkey_alg_names;
+
+/**
+ * OpenPGP symmetric key algorithms as defined in section 9.2 of RFC 4880
+ */
+enum pgp_sym_alg_t {
+	PGP_SYM_ALG_PLAIN    =  0,
+	PGP_SYM_ALG_IDEA     =  1,
+	PGP_SYM_ALG_3DES     =  2,
+	PGP_SYM_ALG_CAST5    =  3,
+	PGP_SYM_ALG_BLOWFISH =  4,
+	PGP_SYM_ALG_SAFER    =  5,
+	PGP_SYM_ALG_DES      =  6,
+	PGP_SYM_ALG_AES_128  =  7,
+	PGP_SYM_ALG_AES_192  =  8,
+	PGP_SYM_ALG_AES_256  =  9,
+	PGP_SYM_ALG_TWOFISH  = 10
+};
+
+/**
+ * Enum names of pgp_sym_alg_t
+ */
+extern enum_name_t *pgp_sym_alg_names;
+
+/**
+ * OpenPGP packet tags as defined in section 4.3 of RFC 4880
+ */
+enum pgp_packet_tag_t {
+	PGP_PKT_RESERVED               =  0,
+	PGP_PKT_PUBKEY_ENC_SESSION_KEY =  1,
+	PGP_PKT_SIGNATURE              =  2,
+	PGP_PKT_SYMKEY_ENC_SESSION_KEY =  3,
+	PGP_PKT_ONE_PASS_SIGNATURE_PKT =  4,
+	PGP_PKT_SECRET_KEY             =  5,
+	PGP_PKT_PUBLIC_KEY             =  6,
+	PGP_PKT_SECRET_SUBKEY          =  7,
+	PGP_PKT_COMPRESSED_DATA        =  8,
+	PGP_PKT_SYMKEY_ENC_DATA        =  9,
+	PGP_PKT_MARKER                 = 10,
+	PGP_PKT_LITERAL_DATA           = 11,
+	PGP_PKT_TRUST                  = 12,
+	PGP_PKT_USER_ID                = 13,
+	PGP_PKT_PUBLIC_SUBKEY          = 14,
+	PGP_PKT_USER_ATTRIBUTE         = 17,
+	PGP_PKT_SYM_ENC_INT_PROT_DATA  = 18,
+	PGP_PKT_MOD_DETECT_CODE        = 19
+};
+
+/**
+ * Enum names of pgp_packet_tag_t
+ */
+extern enum_name_t *pgp_packet_tag_names;
+
+/**
+ * Parse a PGP encoded MPI.
+ *
+ * @param blob		blob to read from, gets advanced
+ * @param mpi		parsed MPI value
+ * @return			TRUE if MPI parsed successfully
+ */
+bool pgp_read_mpi(chunk_t *blob, chunk_t *mpi);
+
+/**
+ * Parse a PGP encoded Scalar.
+ *
+ * @param blob		blob to read from, gets advanced
+ * @param bytes		number of bytes the scalar uses for encoding
+ * @param scalar	resultin scalar
+ * @return			TRUE if scalar parsed successfully
+ */
+bool pgp_read_scalar(chunk_t *blob, size_t bytes, u_int32_t *scalar);
+
+/**
+ * Parse a PGP packet.
+ *
+ * @param blob		blob to read from, gets advanced
+ * @param data		contained packet data
+ * @param tag		tag of the parsed PGP packet
+ * @return			TRUE if packet parsed successfully
+ */
+bool pgp_read_packet(chunk_t *blob, chunk_t *data, pgp_packet_tag_t *tag);
+
+#endif /* PGP_UTILS_ @}*/