1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 7 /* 8 * Copyright (c) 1990 Dennis Ferguson. All rights reserved. 9 * 10 * Commercial use is permitted only if products which are derived from 11 * or include this software are made available for purchase and/or use 12 * in Canada. Otherwise, redistribution and use in source and binary 13 * forms are permitted. 14 */ 15 16 /* 17 * des_cbc_encrypt.c - an implementation of the DES cipher function in cbc mode 18 */ 19 #include "des_int.h" 20 21 /* 22 * des_cbc_encrypt - {en,de}crypt a stream in CBC mode 23 */ 24 25 /* SUNW14resync - sparcv9 cc complained about lack of object init */ 26 /* = all zero */ 27 const mit_des_cblock mit_des_zeroblock = {0, 0, 0, 0, 0, 0, 0, 0}; 28 29 #undef mit_des_cbc_encrypt 30 31 #ifndef _KERNEL 32 int 33 mit_des_cbc_encrypt(context, in, out, length, key, ivec, encrypt) 34 krb5_context context; 35 const mit_des_cblock *in; 36 mit_des_cblock *out; 37 long length; 38 krb5_keyblock *key; 39 mit_des_cblock ivec; 40 int encrypt; 41 { 42 krb5_error_code ret = KRB5_PROG_ETYPE_NOSUPP; 43 KRB5_MECH_TO_PKCS algos; 44 CK_MECHANISM mechanism; 45 CK_RV rv; 46 /* For the Key Object */ 47 48 ret = 0; 49 if ((rv = get_algo(key->enctype, &algos)) != CKR_OK) { 50 KRB5_LOG0(KRB5_ERR, "failure to get algo id in function " 51 "mit_des_cbc_encrypt."); 52 ret = PKCS_ERR; 53 goto cleanup; 54 } 55 56 rv = init_key_uef(krb_ctx_hSession(context), key); 57 if (rv != CKR_OK) { 58 KRB5_LOG(KRB5_ERR, "init_key_uef failed in " 59 "mit_des_cbc_encrypt: rv = 0x%x", rv); 60 ret = PKCS_ERR; 61 goto cleanup; 62 } 63 64 mechanism.mechanism = algos.enc_algo; 65 mechanism.pParameter = ivec; 66 if (ivec != NULL) 67 mechanism.ulParameterLen = MIT_DES_BLOCK_LENGTH; 68 else 69 mechanism.ulParameterLen = 0; 70 71 if (encrypt) 72 rv = C_EncryptInit(krb_ctx_hSession(context), &mechanism, key->hKey); 73 else 74 rv = C_DecryptInit(krb_ctx_hSession(context), &mechanism, key->hKey); 75 76 if (rv != CKR_OK) { 77 KRB5_LOG(KRB5_ERR, "C_EncryptInit/C_DecryptInit failed in " 78 "mit_des_cbc_encrypt: rv = 0x%x", rv); 79 ret = PKCS_ERR; 80 goto cleanup; 81 } 82 83 if (encrypt) 84 rv = C_Encrypt(krb_ctx_hSession(context), (CK_BYTE_PTR)in, 85 (CK_ULONG)length, (CK_BYTE_PTR)out, 86 (CK_ULONG_PTR)&length); 87 else 88 rv = C_Decrypt(krb_ctx_hSession(context), (CK_BYTE_PTR)in, 89 (CK_ULONG)length, (CK_BYTE_PTR)out, 90 (CK_ULONG_PTR)&length); 91 92 if (rv != CKR_OK) { 93 KRB5_LOG(KRB5_ERR, 94 "C_Encrypt/C_Decrypt failed in mit_des_cbc_encrypt: " 95 "rv = 0x%x", rv); 96 ret = PKCS_ERR; 97 } 98 cleanup: 99 100 final_cleanup: 101 if (ret) 102 (void) memset(out, 0, length); 103 104 KRB5_LOG(KRB5_INFO, "mit_des_cbc_encrypt() end retval=%d", ret); 105 106 return(ret); 107 } 108 #else 109 110 /* 111 * This routine performs DES cipher-block-chaining operation, either 112 * encrypting from cleartext to ciphertext, if encrypt != 0 or 113 * decrypting from ciphertext to cleartext, if encrypt == 0. 114 * 115 * The key schedule is passed as an arg, as well as the cleartext or 116 * ciphertext. The cleartext and ciphertext should be in host order. 117 * 118 * NOTE-- the output is ALWAYS an multiple of 8 bytes long. If not 119 * enough space was provided, your program will get trashed. 120 * 121 * For encryption, the cleartext string is null padded, at the end, to 122 * an integral multiple of eight bytes. 123 * 124 * For decryption, the ciphertext will be used in integral multiples 125 * of 8 bytes, but only the first "length" bytes returned into the 126 * cleartext. 127 */ 128 129 /* ARGSUSED */ 130 int 131 mit_des_cbc_encrypt(krb5_context context, 132 const mit_des_cblock *in, 133 mit_des_cblock *out, 134 long length, krb5_keyblock *key, 135 mit_des_cblock ivec, int encrypt) 136 { 137 int ret = KRB5_PROG_ETYPE_NOSUPP; 138 krb5_data ivdata; 139 ret = 0; 140 141 KRB5_LOG(KRB5_INFO, "mit_des_cbc_encrypt() start encrypt=%d", encrypt); 142 143 ivdata.data = (char *)ivec; 144 ivdata.length = sizeof(mit_des_cblock); 145 146 ret = k5_ef_crypto((const char *)in, 147 (char *)out, length, key, &ivdata, encrypt); 148 149 KRB5_LOG(KRB5_INFO, "mit_des_cbc_encrypt() end retval=%d", ret); 150 return(ret); 151 } 152 #endif /* !_KERNEL */ 153