129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
/*
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* Copyright (C) 2013 Glyptodon LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef _GUAC_SSH_KEY_H
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#define _GUAC_SSH_KEY_H
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#include "config.h"
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#include <openssl/ossl_typ.h>
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/**
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* The expected header of RSA private keys.
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*/
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#define SSH_RSA_KEY_HEADER "-----BEGIN RSA PRIVATE KEY-----"
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/**
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* The expected header of DSA private keys.
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*/
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#define SSH_DSA_KEY_HEADER "-----BEGIN DSA PRIVATE KEY-----"
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/**
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* The size of single number within a DSA signature, in bytes.
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*/
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#define DSA_SIG_NUMBER_SIZE 20
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/**
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* The size of a DSA signature, in bytes.
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*/
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#define DSA_SIG_SIZE DSA_SIG_NUMBER_SIZE*2
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/**
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* The type of an SSH key.
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*/
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typedef enum ssh_key_type {
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/**
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* RSA key.
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*/
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SSH_KEY_RSA,
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/**
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* DSA key.
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*/
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SSH_KEY_DSA
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} ssh_key_type;
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/**
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* Abstraction of a key used for SSH authentication.
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*/
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typedef struct ssh_key {
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/**
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* The type of this key.
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*/
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ssh_key_type type;
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/**
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* Underlying RSA private key, if any.
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*/
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RSA* rsa;
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/**
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* Underlying DSA private key, if any.
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*/
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DSA* dsa;
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/**
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* The associated public key, encoded as necessary for SSH.
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*/
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char* public_key;
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/**
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* The length of the public key, in bytes.
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*/
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int public_key_length;
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/**
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* The private key, encoded as necessary for SSH.
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*/
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char* private_key;
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/**
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* The length of the private key, in bytes.
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*/
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int private_key_length;
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} ssh_key;
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/**
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* Allocates a new key containing the given private key data and specified
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* passphrase. If unable to read the key, NULL is returned.
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*/
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ssh_key* ssh_key_alloc(char* data, int length, char* passphrase);
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/**
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* Frees all memory associated with the given key.
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*/
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void ssh_key_free(ssh_key* key);
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/**
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* Signs the given data using the given key, returning the length of the
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* signature in bytes, or a value less than zero on error.
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*/
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int ssh_key_sign(ssh_key* key, const char* data, int length, unsigned char* sig);
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#endif
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