1 /* 2 * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 /* 11 * MD5 and SHA-1 low level APIs are deprecated for public use, but still ok for 12 * internal use. 13 */ 14 #include "internal/deprecated.h" 15 16 #include <string.h> 17 #include "prov/md5_sha1.h" 18 #include <openssl/evp.h> 19 20 int ossl_md5_sha1_init(MD5_SHA1_CTX *mctx) 21 { 22 if (!MD5_Init(&mctx->md5)) 23 return 0; 24 return SHA1_Init(&mctx->sha1); 25 } 26 27 int ossl_md5_sha1_update(MD5_SHA1_CTX *mctx, const void *data, size_t count) 28 { 29 if (!MD5_Update(&mctx->md5, data, count)) 30 return 0; 31 return SHA1_Update(&mctx->sha1, data, count); 32 } 33 34 int ossl_md5_sha1_final(unsigned char *md, MD5_SHA1_CTX *mctx) 35 { 36 if (!MD5_Final(md, &mctx->md5)) 37 return 0; 38 return SHA1_Final(md + MD5_DIGEST_LENGTH, &mctx->sha1); 39 } 40 41 int ossl_md5_sha1_ctrl(MD5_SHA1_CTX *mctx, int cmd, int mslen, void *ms) 42 { 43 unsigned char padtmp[48]; 44 unsigned char md5tmp[MD5_DIGEST_LENGTH]; 45 unsigned char sha1tmp[SHA_DIGEST_LENGTH]; 46 47 if (cmd != EVP_CTRL_SSL3_MASTER_SECRET) 48 return -2; 49 50 if (mctx == NULL) 51 return 0; 52 53 /* SSLv3 client auth handling: see RFC-6101 5.6.8 */ 54 if (mslen != 48) 55 return 0; 56 57 /* At this point hash contains all handshake messages, update 58 * with master secret and pad_1. 59 */ 60 61 if (ossl_md5_sha1_update(mctx, ms, mslen) <= 0) 62 return 0; 63 64 /* Set padtmp to pad_1 value */ 65 memset(padtmp, 0x36, sizeof(padtmp)); 66 67 if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp))) 68 return 0; 69 70 if (!MD5_Final(md5tmp, &mctx->md5)) 71 return 0; 72 73 if (!SHA1_Update(&mctx->sha1, padtmp, 40)) 74 return 0; 75 76 if (!SHA1_Final(sha1tmp, &mctx->sha1)) 77 return 0; 78 79 /* Reinitialise context */ 80 81 if (!ossl_md5_sha1_init(mctx)) 82 return 0; 83 84 if (ossl_md5_sha1_update(mctx, ms, mslen) <= 0) 85 return 0; 86 87 /* Set padtmp to pad_2 value */ 88 memset(padtmp, 0x5c, sizeof(padtmp)); 89 90 if (!MD5_Update(&mctx->md5, padtmp, sizeof(padtmp))) 91 return 0; 92 93 if (!MD5_Update(&mctx->md5, md5tmp, sizeof(md5tmp))) 94 return 0; 95 96 if (!SHA1_Update(&mctx->sha1, padtmp, 40)) 97 return 0; 98 99 if (!SHA1_Update(&mctx->sha1, sha1tmp, sizeof(sha1tmp))) 100 return 0; 101 102 /* Now when ctx is finalised it will return the SSL v3 hash value */ 103 104 OPENSSL_cleanse(md5tmp, sizeof(md5tmp)); 105 OPENSSL_cleanse(sha1tmp, sizeof(sha1tmp)); 106 107 return 1; 108 } 109