mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
cc1920749e
Your redbean can now interoperate with clients that require TLS crypto. This is accomplished using a protocol polyglot that lets us distinguish between HTTP and HTTPS regardless of the port number. Certificates will be generated automatically, if none are supplied by the user. Footprint increases by only a few hundred kb so redbean in MODY=tiny is now 1.0mb - Add lseek() polyfills for ZIP executable - Automatically polyfill /tmp/FOO paths on NT - Fix readdir() / ftw() / nftw() bugs on Windows - Introduce -B flag for slower SSL that's stronger - Remove mbedtls features Cosmopolitan doesn't need - Have base64 decoder support the uri-safe alternative - Remove Truncated HMAC because it's forbidden by the IETF - Add all the mbedtls test suites and make them go 3x faster - Support opendir() / readdir() / closedir() on ZIP executable - Use Everest for ECDHE-ECDSA because it's so good it's so good - Add tinier implementation of sha1 since it's not worth the rom - Add chi-square monte-carlo mean correlation tests for getrandom() - Source entropy on Windows from the proper interface everyone uses We're continuing to outperform NGINX and other servers on raw message throughput. Using SSL means that instead of 1,000,000 qps you can get around 300,000 qps. However redbean isn't as fast as NGINX yet at SSL handshakes, since redbean can do 2,627 per second and NGINX does 4.3k Right now, the SSL UX story works best if you give your redbean a key signing key since that can be easily generated by openssl using a one liner then redbean will do all the things that are impossibly hard to do like signing ecdsa and rsa certificates that'll work in chrome. We should integrate the let's encrypt acme protocol in the future. Live Demo: https://redbean.justine.lol/ Root Cert: https://redbean.justine.lol/redbean1.crt
485 lines
14 KiB
C
485 lines
14 KiB
C
#include "libc/mem/mem.h"
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#include "third_party/mbedtls/aes.h"
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#include "third_party/mbedtls/base64.h"
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#include "third_party/mbedtls/cipher.h"
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#include "third_party/mbedtls/common.h"
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#include "third_party/mbedtls/des.h"
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#include "third_party/mbedtls/error.h"
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#include "third_party/mbedtls/md5.h"
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#include "third_party/mbedtls/pem.h"
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#include "third_party/mbedtls/platform.h"
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/* clang-format off */
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asm(".ident\t\"\\n\\n\
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Mbed TLS (Apache 2.0)\\n\
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Copyright ARM Limited\\n\
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Copyright Mbed TLS Contributors\"");
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asm(".include \"libc/disclaimer.inc\"");
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/*
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* Privacy Enhanced Mail (PEM) decoding
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if defined(MBEDTLS_PEM_PARSE_C) || defined(MBEDTLS_PEM_WRITE_C)
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#if defined(MBEDTLS_PEM_PARSE_C)
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void mbedtls_pem_init( mbedtls_pem_context *ctx )
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{
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memset( ctx, 0, sizeof( mbedtls_pem_context ) );
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}
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#if defined(MBEDTLS_MD5_C) && defined(MBEDTLS_CIPHER_MODE_CBC) && \
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( defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C) )
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/*
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* Read a 16-byte hex string and convert it to binary
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*/
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static int pem_get_iv( const unsigned char *s, unsigned char *iv,
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size_t iv_len )
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{
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size_t i, j, k;
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memset( iv, 0, iv_len );
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for( i = 0; i < iv_len * 2; i++, s++ )
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{
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if( *s >= '0' && *s <= '9' ) j = *s - '0'; else
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if( *s >= 'A' && *s <= 'F' ) j = *s - '7'; else
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if( *s >= 'a' && *s <= 'f' ) j = *s - 'W'; else
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return( MBEDTLS_ERR_PEM_INVALID_ENC_IV );
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k = ( ( i & 1 ) != 0 ) ? j : j << 4;
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iv[i >> 1] = (unsigned char)( iv[i >> 1] | k );
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}
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return( 0 );
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}
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static int pem_pbkdf1( unsigned char *key, size_t keylen,
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unsigned char *iv,
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const unsigned char *pwd, size_t pwdlen )
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{
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mbedtls_md5_context md5_ctx;
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unsigned char md5sum[16];
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size_t use_len;
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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mbedtls_md5_init( &md5_ctx );
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/*
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* key[ 0..15] = MD5(pwd || IV)
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*/
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if( ( ret = mbedtls_md5_starts_ret( &md5_ctx ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_md5_update_ret( &md5_ctx, pwd, pwdlen ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_md5_update_ret( &md5_ctx, iv, 8 ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_md5_finish_ret( &md5_ctx, md5sum ) ) != 0 )
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goto exit;
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if( keylen <= 16 )
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{
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memcpy( key, md5sum, keylen );
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goto exit;
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}
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memcpy( key, md5sum, 16 );
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/*
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* key[16..23] = MD5(key[ 0..15] || pwd || IV])
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*/
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if( ( ret = mbedtls_md5_starts_ret( &md5_ctx ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_md5_update_ret( &md5_ctx, md5sum, 16 ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_md5_update_ret( &md5_ctx, pwd, pwdlen ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_md5_update_ret( &md5_ctx, iv, 8 ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_md5_finish_ret( &md5_ctx, md5sum ) ) != 0 )
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goto exit;
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use_len = 16;
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if( keylen < 32 )
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use_len = keylen - 16;
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memcpy( key + 16, md5sum, use_len );
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exit:
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mbedtls_md5_free( &md5_ctx );
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mbedtls_platform_zeroize( md5sum, 16 );
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return( ret );
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}
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#if defined(MBEDTLS_DES_C)
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/*
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* Decrypt with DES-CBC, using PBKDF1 for key derivation
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*/
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static int pem_des_decrypt( unsigned char des_iv[8],
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unsigned char *buf, size_t buflen,
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const unsigned char *pwd, size_t pwdlen )
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{
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mbedtls_des_context des_ctx;
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unsigned char des_key[8];
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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mbedtls_des_init( &des_ctx );
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if( ( ret = pem_pbkdf1( des_key, 8, des_iv, pwd, pwdlen ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_des_setkey_dec( &des_ctx, des_key ) ) != 0 )
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goto exit;
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ret = mbedtls_des_crypt_cbc( &des_ctx, MBEDTLS_DES_DECRYPT, buflen,
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des_iv, buf, buf );
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exit:
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mbedtls_des_free( &des_ctx );
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mbedtls_platform_zeroize( des_key, 8 );
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return( ret );
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}
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/*
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* Decrypt with 3DES-CBC, using PBKDF1 for key derivation
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*/
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static int pem_des3_decrypt( unsigned char des3_iv[8],
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unsigned char *buf, size_t buflen,
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const unsigned char *pwd, size_t pwdlen )
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{
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mbedtls_des3_context des3_ctx;
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unsigned char des3_key[24];
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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mbedtls_des3_init( &des3_ctx );
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if( ( ret = pem_pbkdf1( des3_key, 24, des3_iv, pwd, pwdlen ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_des3_set3key_dec( &des3_ctx, des3_key ) ) != 0 )
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goto exit;
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ret = mbedtls_des3_crypt_cbc( &des3_ctx, MBEDTLS_DES_DECRYPT, buflen,
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des3_iv, buf, buf );
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exit:
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mbedtls_des3_free( &des3_ctx );
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mbedtls_platform_zeroize( des3_key, 24 );
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return( ret );
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}
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#endif /* MBEDTLS_DES_C */
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#if defined(MBEDTLS_AES_C)
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/*
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* Decrypt with AES-XXX-CBC, using PBKDF1 for key derivation
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*/
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static int pem_aes_decrypt( unsigned char aes_iv[16], unsigned int keylen,
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unsigned char *buf, size_t buflen,
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const unsigned char *pwd, size_t pwdlen )
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{
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mbedtls_aes_context aes_ctx;
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unsigned char aes_key[32];
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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mbedtls_aes_init( &aes_ctx );
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if( ( ret = pem_pbkdf1( aes_key, keylen, aes_iv, pwd, pwdlen ) ) != 0 )
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goto exit;
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if( ( ret = mbedtls_aes_setkey_dec( &aes_ctx, aes_key, keylen * 8 ) ) != 0 )
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goto exit;
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ret = mbedtls_aes_crypt_cbc( &aes_ctx, MBEDTLS_AES_DECRYPT, buflen,
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aes_iv, buf, buf );
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exit:
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mbedtls_aes_free( &aes_ctx );
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mbedtls_platform_zeroize( aes_key, keylen );
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return( ret );
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}
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#endif /* MBEDTLS_AES_C */
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#endif /* MBEDTLS_MD5_C && MBEDTLS_CIPHER_MODE_CBC &&
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( MBEDTLS_AES_C || MBEDTLS_DES_C ) */
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int mbedtls_pem_read_buffer( mbedtls_pem_context *ctx, const char *header, const char *footer,
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const unsigned char *data, const unsigned char *pwd,
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size_t pwdlen, size_t *use_len )
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{
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int ret, enc;
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size_t len;
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unsigned char *buf;
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const unsigned char *s1, *s2, *end;
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#if defined(MBEDTLS_MD5_C) && defined(MBEDTLS_CIPHER_MODE_CBC) && \
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( defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C) )
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unsigned char pem_iv[16];
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mbedtls_cipher_type_t enc_alg = MBEDTLS_CIPHER_NONE;
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#else
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((void) pwd);
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((void) pwdlen);
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#endif /* MBEDTLS_MD5_C && MBEDTLS_CIPHER_MODE_CBC &&
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( MBEDTLS_AES_C || MBEDTLS_DES_C ) */
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if( ctx == NULL )
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return( MBEDTLS_ERR_PEM_BAD_INPUT_DATA );
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s1 = (unsigned char *) strstr( (const char *) data, header );
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if( s1 == NULL )
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return( MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT );
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s2 = (unsigned char *) strstr( (const char *) data, footer );
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if( s2 == NULL || s2 <= s1 )
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return( MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT );
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s1 += strlen( header );
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if( *s1 == ' ' ) s1++;
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if( *s1 == '\r' ) s1++;
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if( *s1 == '\n' ) s1++;
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else return( MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT );
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end = s2;
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end += strlen( footer );
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if( *end == ' ' ) end++;
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if( *end == '\r' ) end++;
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if( *end == '\n' ) end++;
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*use_len = end - data;
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enc = 0;
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if( s2 - s1 >= 22 && memcmp( s1, "Proc-Type: 4,ENCRYPTED", 22 ) == 0 )
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{
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#if defined(MBEDTLS_MD5_C) && defined(MBEDTLS_CIPHER_MODE_CBC) && \
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( defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C) )
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enc++;
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s1 += 22;
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if( *s1 == '\r' ) s1++;
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if( *s1 == '\n' ) s1++;
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else return( MBEDTLS_ERR_PEM_INVALID_DATA );
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#if defined(MBEDTLS_DES_C)
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if( s2 - s1 >= 23 && memcmp( s1, "DEK-Info: DES-EDE3-CBC,", 23 ) == 0 )
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{
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enc_alg = MBEDTLS_CIPHER_DES_EDE3_CBC;
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s1 += 23;
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if( s2 - s1 < 16 || pem_get_iv( s1, pem_iv, 8 ) != 0 )
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return( MBEDTLS_ERR_PEM_INVALID_ENC_IV );
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s1 += 16;
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}
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else if( s2 - s1 >= 18 && memcmp( s1, "DEK-Info: DES-CBC,", 18 ) == 0 )
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{
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enc_alg = MBEDTLS_CIPHER_DES_CBC;
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s1 += 18;
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if( s2 - s1 < 16 || pem_get_iv( s1, pem_iv, 8) != 0 )
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return( MBEDTLS_ERR_PEM_INVALID_ENC_IV );
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s1 += 16;
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}
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#endif /* MBEDTLS_DES_C */
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#if defined(MBEDTLS_AES_C)
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if( s2 - s1 >= 14 && memcmp( s1, "DEK-Info: AES-", 14 ) == 0 )
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{
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if( s2 - s1 < 22 )
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return( MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG );
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else if( memcmp( s1, "DEK-Info: AES-128-CBC,", 22 ) == 0 )
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enc_alg = MBEDTLS_CIPHER_AES_128_CBC;
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else if( memcmp( s1, "DEK-Info: AES-192-CBC,", 22 ) == 0 )
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enc_alg = MBEDTLS_CIPHER_AES_192_CBC;
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else if( memcmp( s1, "DEK-Info: AES-256-CBC,", 22 ) == 0 )
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enc_alg = MBEDTLS_CIPHER_AES_256_CBC;
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else
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return( MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG );
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s1 += 22;
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if( s2 - s1 < 32 || pem_get_iv( s1, pem_iv, 16 ) != 0 )
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return( MBEDTLS_ERR_PEM_INVALID_ENC_IV );
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s1 += 32;
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}
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#endif /* MBEDTLS_AES_C */
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if( enc_alg == MBEDTLS_CIPHER_NONE )
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return( MBEDTLS_ERR_PEM_UNKNOWN_ENC_ALG );
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if( *s1 == '\r' ) s1++;
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if( *s1 == '\n' ) s1++;
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else return( MBEDTLS_ERR_PEM_INVALID_DATA );
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#else
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return( MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE );
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#endif /* MBEDTLS_MD5_C && MBEDTLS_CIPHER_MODE_CBC &&
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( MBEDTLS_AES_C || MBEDTLS_DES_C ) */
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}
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if( s1 >= s2 )
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return( MBEDTLS_ERR_PEM_INVALID_DATA );
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ret = mbedtls_base64_decode( NULL, 0, &len, s1, s2 - s1 );
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if( ret == MBEDTLS_ERR_BASE64_INVALID_CHARACTER )
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return( MBEDTLS_ERR_PEM_INVALID_DATA + ret );
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if( ( buf = mbedtls_calloc( 1, len ) ) == NULL )
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return( MBEDTLS_ERR_PEM_ALLOC_FAILED );
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if( ( ret = mbedtls_base64_decode( buf, len, &len, s1, s2 - s1 ) ) != 0 )
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{
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mbedtls_platform_zeroize( buf, len );
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mbedtls_free( buf );
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return( MBEDTLS_ERR_PEM_INVALID_DATA + ret );
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}
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if( enc != 0 )
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{
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#if defined(MBEDTLS_MD5_C) && defined(MBEDTLS_CIPHER_MODE_CBC) && \
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( defined(MBEDTLS_DES_C) || defined(MBEDTLS_AES_C) )
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if( pwd == NULL )
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{
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mbedtls_platform_zeroize( buf, len );
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mbedtls_free( buf );
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return( MBEDTLS_ERR_PEM_PASSWORD_REQUIRED );
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}
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ret = 0;
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#if defined(MBEDTLS_DES_C)
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if( enc_alg == MBEDTLS_CIPHER_DES_EDE3_CBC )
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ret = pem_des3_decrypt( pem_iv, buf, len, pwd, pwdlen );
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else if( enc_alg == MBEDTLS_CIPHER_DES_CBC )
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ret = pem_des_decrypt( pem_iv, buf, len, pwd, pwdlen );
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#endif /* MBEDTLS_DES_C */
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#if defined(MBEDTLS_AES_C)
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if( enc_alg == MBEDTLS_CIPHER_AES_128_CBC )
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ret = pem_aes_decrypt( pem_iv, 16, buf, len, pwd, pwdlen );
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else if( enc_alg == MBEDTLS_CIPHER_AES_192_CBC )
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ret = pem_aes_decrypt( pem_iv, 24, buf, len, pwd, pwdlen );
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else if( enc_alg == MBEDTLS_CIPHER_AES_256_CBC )
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ret = pem_aes_decrypt( pem_iv, 32, buf, len, pwd, pwdlen );
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#endif /* MBEDTLS_AES_C */
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if( ret != 0 )
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{
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mbedtls_free( buf );
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return( ret );
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}
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/*
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* The result will be ASN.1 starting with a SEQUENCE tag, with 1 to 3
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* length bytes (allow 4 to be sure) in all known use cases.
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*
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* Use that as a heuristic to try to detect password mismatches.
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*/
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if( len <= 2 || buf[0] != 0x30 || buf[1] > 0x83 )
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{
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mbedtls_platform_zeroize( buf, len );
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mbedtls_free( buf );
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return( MBEDTLS_ERR_PEM_PASSWORD_MISMATCH );
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}
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#else
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mbedtls_platform_zeroize( buf, len );
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mbedtls_free( buf );
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return( MBEDTLS_ERR_PEM_FEATURE_UNAVAILABLE );
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#endif /* MBEDTLS_MD5_C && MBEDTLS_CIPHER_MODE_CBC &&
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( MBEDTLS_AES_C || MBEDTLS_DES_C ) */
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}
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ctx->buf = buf;
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ctx->buflen = len;
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return( 0 );
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}
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void mbedtls_pem_free( mbedtls_pem_context *ctx )
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{
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if ( ctx->buf != NULL )
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{
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mbedtls_platform_zeroize( ctx->buf, ctx->buflen );
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mbedtls_free( ctx->buf );
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}
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mbedtls_free( ctx->info );
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mbedtls_platform_zeroize( ctx, sizeof( mbedtls_pem_context ) );
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}
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#endif /* MBEDTLS_PEM_PARSE_C */
|
|
|
|
#if defined(MBEDTLS_PEM_WRITE_C)
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|
int mbedtls_pem_write_buffer( const char *header, const char *footer,
|
|
const unsigned char *der_data, size_t der_len,
|
|
unsigned char *buf, size_t buf_len, size_t *olen )
|
|
{
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|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
unsigned char *encode_buf = NULL, *c, *p = buf;
|
|
size_t len = 0, use_len, add_len = 0;
|
|
|
|
mbedtls_base64_encode( NULL, 0, &use_len, der_data, der_len );
|
|
add_len = strlen( header ) + strlen( footer ) + ( use_len / 64 ) + 1;
|
|
|
|
if( use_len + add_len > buf_len )
|
|
{
|
|
*olen = use_len + add_len;
|
|
return( MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL );
|
|
}
|
|
|
|
if( use_len != 0 &&
|
|
( ( encode_buf = mbedtls_calloc( 1, use_len ) ) == NULL ) )
|
|
return( MBEDTLS_ERR_PEM_ALLOC_FAILED );
|
|
|
|
if( ( ret = mbedtls_base64_encode( encode_buf, use_len, &use_len, der_data,
|
|
der_len ) ) != 0 )
|
|
{
|
|
mbedtls_free( encode_buf );
|
|
return( ret );
|
|
}
|
|
|
|
memcpy( p, header, strlen( header ) );
|
|
p += strlen( header );
|
|
c = encode_buf;
|
|
|
|
while( use_len )
|
|
{
|
|
len = ( use_len > 64 ) ? 64 : use_len;
|
|
memcpy( p, c, len );
|
|
use_len -= len;
|
|
p += len;
|
|
c += len;
|
|
*p++ = '\n';
|
|
}
|
|
|
|
memcpy( p, footer, strlen( footer ) );
|
|
p += strlen( footer );
|
|
|
|
*p++ = '\0';
|
|
*olen = p - buf;
|
|
|
|
/* Clean any remaining data previously written to the buffer */
|
|
memset( buf + *olen, 0, buf_len - *olen );
|
|
|
|
mbedtls_free( encode_buf );
|
|
return( 0 );
|
|
}
|
|
#endif /* MBEDTLS_PEM_WRITE_C */
|
|
#endif /* MBEDTLS_PEM_PARSE_C || MBEDTLS_PEM_WRITE_C */
|
|
|