New release 1.7.0

1 files changed, 483 insertions, 0 deletions

diff --git a/ccast/axTLS/loader.c b/ccast/axTLS/loader.c
new file mode 100644
index 0000000..92167be
--- /dev/null
+++ b/ccast/axTLS/loader.c
@@ -0,0 +1,483 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, 
+ *   this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice, 
+ *   this list of conditions and the following disclaimer in the documentation 
+ *   and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors 
+ *   may be used to endorse or promote products derived from this software 
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Load certificates/keys into memory. These can be in many different formats.
+ * PEM support and other formats can be processed here.
+ *
+ * The PEM private keys may be optionally encrypted with AES128 or AES256. 
+ * The encrypted PEM keys were generated with something like:
+ *
+ * openssl genrsa -aes128 -passout pass:abcd -out axTLS.key_aes128.pem 512
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "os_port.h"
+#include "ssl.h"
+
+static int do_obj(SSL_CTX *ssl_ctx, int obj_type, 
+                    SSLObjLoader *ssl_obj, const char *password);
+#ifdef CONFIG_SSL_HAS_PEM
+static int ssl_obj_PEM_load(SSL_CTX *ssl_ctx, int obj_type, 
+                        SSLObjLoader *ssl_obj, const char *password);
+#endif
+
+/*
+ * Load a file into memory that is in binary DER (or ascii PEM) format.
+ */
+EXP_FUNC int STDCALL ssl_obj_load(SSL_CTX *ssl_ctx, int obj_type, 
+                            const char *filename, const char *password)
+{
+#ifndef CONFIG_SSL_SKELETON_MODE
+    static const char * const begin = "-----BEGIN";
+    int ret = SSL_OK;
+    SSLObjLoader *ssl_obj = NULL;
+
+    if (filename == NULL)
+    {
+        ret = SSL_ERROR_INVALID_KEY;
+        goto error;
+    }
+
+    ssl_obj = (SSLObjLoader *)calloc(1, sizeof(SSLObjLoader));
+    ssl_obj->len = get_file(filename, &ssl_obj->buf); 
+    if (ssl_obj->len <= 0)
+    {
+        ret = SSL_ERROR_INVALID_KEY;
+        goto error;
+    }
+
+    /* is the file a PEM file? */
+    if (strstr((char *)ssl_obj->buf, begin) != NULL)
+    {
+#ifdef CONFIG_SSL_HAS_PEM
+        ret = ssl_obj_PEM_load(ssl_ctx, obj_type, ssl_obj, password);
+#else
+        puts(unsupported_str);
+        ret = SSL_ERROR_NOT_SUPPORTED;
+#endif
+    }
+    else
+        ret = do_obj(ssl_ctx, obj_type, ssl_obj, password);
+
+error:
+    ssl_obj_free(ssl_obj);
+    return ret;
+#else
+    puts(unsupported_str);
+    return SSL_ERROR_NOT_SUPPORTED;
+#endif /* CONFIG_SSL_SKELETON_MODE */
+}
+
+/*
+ * Transfer binary data into the object loader.
+ */
+EXP_FUNC int STDCALL ssl_obj_memory_load(SSL_CTX *ssl_ctx, int mem_type, 
+        const uint8_t *data, int len, const char *password)
+{
+    int ret;
+    SSLObjLoader *ssl_obj;
+
+    ssl_obj = (SSLObjLoader *)calloc(1, sizeof(SSLObjLoader));
+    ssl_obj->buf = (uint8_t *)malloc(len);
+    memcpy(ssl_obj->buf, data, len);
+    ssl_obj->len = len;
+    ret = do_obj(ssl_ctx, mem_type, ssl_obj, password);
+    ssl_obj_free(ssl_obj);
+    return ret;
+}
+
+/*
+ * Actually work out what we are doing 
+ */
+static int do_obj(SSL_CTX *ssl_ctx, int obj_type, 
+                    SSLObjLoader *ssl_obj, const char *password)
+{
+    int ret = SSL_OK;
+
+    switch (obj_type)
+    {
+        case SSL_OBJ_RSA_KEY:
+            ret = add_private_key(ssl_ctx, ssl_obj);
+            break;
+
+        case SSL_OBJ_X509_CERT:
+            ret = add_cert(ssl_ctx, ssl_obj->buf, ssl_obj->len);
+            break;
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+        case SSL_OBJ_X509_CACERT:
+            add_cert_auth(ssl_ctx, ssl_obj->buf, ssl_obj->len);
+            break;
+#endif
+
+#ifdef CONFIG_SSL_USE_PKCS12
+        case SSL_OBJ_PKCS8:
+            ret = pkcs8_decode(ssl_ctx, ssl_obj, password);
+            break;
+
+        case SSL_OBJ_PKCS12:
+            ret = pkcs12_decode(ssl_ctx, ssl_obj, password);
+            break;
+#endif
+        default:
+            puts(unsupported_str);
+            ret = SSL_ERROR_NOT_SUPPORTED;
+            break;
+    }
+
+    return ret;
+}
+
+/*
+ * Clean up our mess.
+ */
+void ssl_obj_free(SSLObjLoader *ssl_obj)
+{
+    if (ssl_obj)
+    {
+        free(ssl_obj->buf);
+        free(ssl_obj);
+    }
+}
+
+/*
+ * Support for PEM encoded keys/certificates.
+ */
+#ifdef CONFIG_SSL_HAS_PEM
+
+#define NUM_PEM_TYPES               4
+#define IV_SIZE                     16
+#define IS_RSA_PRIVATE_KEY          0
+#define IS_ENCRYPTED_PRIVATE_KEY    1
+#define IS_PRIVATE_KEY              2
+#define IS_CERTIFICATE              3
+
+static const char * const begins[NUM_PEM_TYPES] =
+{
+    "-----BEGIN RSA PRIVATE KEY-----",
+    "-----BEGIN ENCRYPTED PRIVATE KEY-----",
+    "-----BEGIN PRIVATE KEY-----",
+    "-----BEGIN CERTIFICATE-----",
+};
+
+static const char * const ends[NUM_PEM_TYPES] =
+{
+    "-----END RSA PRIVATE KEY-----",
+    "-----END ENCRYPTED PRIVATE KEY-----",
+    "-----END PRIVATE KEY-----",
+    "-----END CERTIFICATE-----",
+};
+
+static const char * const aes_str[2] =
+{
+    "DEK-Info: AES-128-CBC,",
+    "DEK-Info: AES-256-CBC," 
+};
+
+/**
+ * Take a base64 blob of data and decrypt it (using AES) into its 
+ * proper ASN.1 form.
+ */
+static int pem_decrypt(const char *where, const char *end,
+                        const char *password, SSLObjLoader *ssl_obj)
+{
+    int ret = -1;
+    int is_aes_256 = 0;
+    char *start = NULL;
+    uint8_t iv[IV_SIZE];
+    int i, pem_size;
+    MD5_CTX md5_ctx;
+    AES_CTX aes_ctx;
+    uint8_t key[32];        /* AES256 size */
+
+    if (password == NULL || strlen(password) == 0)
+    {
+#ifdef CONFIG_SSL_FULL_MODE
+        printf("Error: Need a password for this PEM file\n"); TTY_FLUSH();
+#endif
+        goto error;
+    }
+
+    if ((start = strstr((const char *)where, aes_str[0])))         /* AES128? */
+    {
+        start += strlen(aes_str[0]);
+    }
+    else if ((start = strstr((const char *)where, aes_str[1])))    /* AES256? */
+    {
+        is_aes_256 = 1;
+        start += strlen(aes_str[1]);
+    }
+    else 
+    {
+#ifdef CONFIG_SSL_FULL_MODE
+        printf("Error: Unsupported password cipher\n"); TTY_FLUSH();
+#endif
+        goto error;
+    }
+
+    /* convert from hex to binary - assumes uppercase hex */
+    for (i = 0; i < IV_SIZE; i++)
+    {
+        char c = *start++ - '0';
+        iv[i] = (c > 9 ? c + '0' - 'A' + 10 : c) << 4;
+        c = *start++ - '0';
+        iv[i] += (c > 9 ? c + '0' - 'A' + 10 : c);
+    }
+
+    while (*start == '\r' || *start == '\n')
+        start++;
+
+    /* turn base64 into binary */
+    pem_size = (int)(end-start);
+    if (base64_decode(start, pem_size, ssl_obj->buf, &ssl_obj->len) != 0)
+        goto error;
+
+    /* work out the key */
+    MD5_Init(&md5_ctx);
+    MD5_Update(&md5_ctx, (const uint8_t *)password, strlen(password));
+    MD5_Update(&md5_ctx, iv, SALT_SIZE);
+    MD5_Final(key, &md5_ctx);
+
+    if (is_aes_256)
+    {
+        MD5_Init(&md5_ctx);
+        MD5_Update(&md5_ctx, key, MD5_SIZE);
+        MD5_Update(&md5_ctx, (const uint8_t *)password, strlen(password));
+        MD5_Update(&md5_ctx, iv, SALT_SIZE);
+        MD5_Final(&key[MD5_SIZE], &md5_ctx);
+    }
+
+    /* decrypt using the key/iv */
+    AES_set_key(&aes_ctx, key, iv, is_aes_256 ? AES_MODE_256 : AES_MODE_128);
+    AES_convert_key(&aes_ctx);
+    AES_cbc_decrypt(&aes_ctx, ssl_obj->buf, ssl_obj->buf, ssl_obj->len);
+    ret = 0;
+
+error:
+    return ret; 
+}
+
+/**
+ * Take a base64 blob of data and turn it into its proper ASN.1 form.
+ */
+static int new_pem_obj(SSL_CTX *ssl_ctx, int is_cacert, char *where, 
+                    int remain, const char *password)
+{
+    int ret = SSL_ERROR_BAD_CERTIFICATE;
+    SSLObjLoader *ssl_obj = NULL;
+
+    while (remain > 0)
+    {
+        int i, pem_size, obj_type;
+        char *start = NULL, *end = NULL;
+
+        for (i = 0; i < NUM_PEM_TYPES; i++)
+        {
+            if ((start = strstr(where, begins[i])) &&
+                    (end = strstr(where, ends[i])))
+            {
+                remain -= (int)(end-where);
+                start += strlen(begins[i]);
+                pem_size = (int)(end-start);
+
+                ssl_obj = (SSLObjLoader *)calloc(1, sizeof(SSLObjLoader));
+
+                /* 4/3 bigger than what we need but so what */
+                ssl_obj->buf = (uint8_t *)calloc(1, pem_size);
+                ssl_obj->len = pem_size;
+
+                if (i == IS_RSA_PRIVATE_KEY && 
+                            strstr(start, "Proc-Type:") && 
+                            strstr(start, "4,ENCRYPTED"))
+                {
+                    /* check for encrypted PEM file */
+                    if (pem_decrypt(start, end, password, ssl_obj) < 0)
+                    {
+                        ret = SSL_ERROR_BAD_CERTIFICATE;
+                        goto error;
+                    }
+                }
+                else 
+                {
+                    ssl_obj->len = pem_size;
+                    if (base64_decode(start, pem_size, 
+                                ssl_obj->buf, &ssl_obj->len) != 0)
+                    {
+                        ret = SSL_ERROR_BAD_CERTIFICATE;
+                        goto error;
+                    }
+                }
+
+                switch (i)
+                {
+                    case IS_RSA_PRIVATE_KEY:
+                        obj_type = SSL_OBJ_RSA_KEY;
+                        break;
+
+                    case IS_ENCRYPTED_PRIVATE_KEY:
+                    case IS_PRIVATE_KEY:
+                        obj_type = SSL_OBJ_PKCS8;
+                        break;
+
+                    case IS_CERTIFICATE:
+                        obj_type = is_cacert ?
+                                        SSL_OBJ_X509_CACERT : SSL_OBJ_X509_CERT;
+                        break;
+
+                    default:
+                        ret = SSL_ERROR_BAD_CERTIFICATE;
+                        goto error;
+                }
+
+                /* In a format we can now understand - so process it */
+                if ((ret = do_obj(ssl_ctx, obj_type, ssl_obj, password)))
+                    goto error;
+
+                end += strlen(ends[i]);
+                remain -= strlen(ends[i]);
+                while (remain > 0 && (*end == '\r' || *end == '\n'))
+                {
+                    end++;
+                    remain--;
+                }
+
+                where = end;
+                break;
+            }
+        }
+
+        ssl_obj_free(ssl_obj);
+        ssl_obj = NULL;
+        if (start == NULL)
+           break;
+    }
+error:
+    ssl_obj_free(ssl_obj);
+    return ret;
+}
+
+/*
+ * Load a file into memory that is in ASCII PEM format.
+ */
+static int ssl_obj_PEM_load(SSL_CTX *ssl_ctx, int obj_type, 
+                        SSLObjLoader *ssl_obj, const char *password)
+{
+    char *start;
+
+    /* add a null terminator */
+    ssl_obj->len++;
+    ssl_obj->buf = (uint8_t *)realloc(ssl_obj->buf, ssl_obj->len);
+    ssl_obj->buf[ssl_obj->len-1] = 0;
+    start = (char *)ssl_obj->buf;
+    return new_pem_obj(ssl_ctx, obj_type == SSL_OBJ_X509_CACERT,
+                                start, ssl_obj->len, password);
+}
+#endif /* CONFIG_SSL_HAS_PEM */
+
+/**
+ * Load the key/certificates in memory depending on compile-time and user
+ * options. 
+ */
+int load_key_certs(SSL_CTX *ssl_ctx)
+{
+    int ret = SSL_OK;
+    uint32_t options = ssl_ctx->options;
+#ifdef CONFIG_SSL_GENERATE_X509_CERT 
+    uint8_t *cert_data = NULL;
+    int cert_size;
+    static const char *dn[] = 
+    {
+        CONFIG_SSL_X509_COMMON_NAME,
+        CONFIG_SSL_X509_ORGANIZATION_NAME,
+        CONFIG_SSL_X509_ORGANIZATION_UNIT_NAME
+    };
+#endif
+
+    /* do the private key first */
+    if (strlen(CONFIG_SSL_PRIVATE_KEY_LOCATION) > 0)
+    {
+        if ((ret = ssl_obj_load(ssl_ctx, SSL_OBJ_RSA_KEY, 
+                                CONFIG_SSL_PRIVATE_KEY_LOCATION,
+                                CONFIG_SSL_PRIVATE_KEY_PASSWORD)) < 0)
+            goto error;
+    }
+    else if (!(options & SSL_NO_DEFAULT_KEY))
+    {
+#if defined(CONFIG_SSL_USE_DEFAULT_KEY) || defined(CONFIG_SSL_SKELETON_MODE)
+        static const    /* saves a few more bytes */
+#include "private_key.h"
+
+        ssl_obj_memory_load(ssl_ctx, SSL_OBJ_RSA_KEY, default_private_key,
+                default_private_key_len, NULL); 
+#endif
+    }
+
+    /* now load the certificate */
+#ifdef CONFIG_SSL_GENERATE_X509_CERT 
+    if ((cert_size = ssl_x509_create(ssl_ctx, 0, dn, &cert_data)) < 0)
+    {
+        ret = cert_size;
+        goto error;
+    }
+
+    ssl_obj_memory_load(ssl_ctx, SSL_OBJ_X509_CERT, cert_data, cert_size, NULL);
+    free(cert_data);
+#else
+    if (strlen(CONFIG_SSL_X509_CERT_LOCATION))
+    {
+        if ((ret = ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT, 
+                                CONFIG_SSL_X509_CERT_LOCATION, NULL)) < 0)
+            goto error;
+    }
+    else if (!(options & SSL_NO_DEFAULT_KEY))
+    {
+#if defined(CONFIG_SSL_USE_DEFAULT_KEY) || defined(CONFIG_SSL_SKELETON_MODE)
+        static const    /* saves a few bytes and RAM */
+#include "cert.h"
+        ssl_obj_memory_load(ssl_ctx, SSL_OBJ_X509_CERT, 
+                    default_certificate, default_certificate_len, NULL);
+#endif
+    }
+#endif
+
+error:
+#ifdef CONFIG_SSL_FULL_MODE
+    if (ret)
+    {
+        printf("Error: Certificate or key not loaded\n"); TTY_FLUSH();
+    }
+#endif
+
+    return ret;
+
+}