2 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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34 /* Functions which are used by both single and triple DES enctypes */
36 #include "krb5_locl.h"
39 * A = A xor B. A & B are 8 bytes.
43 _krb5_xor (DES_cblock *key, const unsigned char *b)
45 unsigned char *a = (unsigned char*)key;
56 #if defined(DES3_OLD_ENCTYPE) || defined(HEIM_WEAK_CRYPTO)
58 _krb5_des_checksum(krb5_context context,
60 struct _krb5_key_data *key,
65 struct _krb5_evp_schedule *ctx = key->schedule->data;
68 unsigned char *p = cksum->checksum.data;
70 krb5_generate_random_block(p, 8);
72 m = EVP_MD_CTX_create();
74 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
78 EVP_DigestInit_ex(m, evp_md, NULL);
79 EVP_DigestUpdate(m, p, 8);
80 EVP_DigestUpdate(m, data, len);
81 EVP_DigestFinal_ex (m, p + 8, NULL);
82 EVP_MD_CTX_destroy(m);
83 memset (&ivec, 0, sizeof(ivec));
84 EVP_CipherInit_ex(&ctx->ectx, NULL, NULL, NULL, (void *)&ivec, -1);
85 EVP_Cipher(&ctx->ectx, p, p, 24);
91 _krb5_des_verify(krb5_context context,
93 struct _krb5_key_data *key,
98 struct _krb5_evp_schedule *ctx = key->schedule->data;
100 unsigned char tmp[24];
101 unsigned char res[16];
103 krb5_error_code ret = 0;
105 m = EVP_MD_CTX_create();
107 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
111 memset(&ivec, 0, sizeof(ivec));
112 EVP_CipherInit_ex(&ctx->dctx, NULL, NULL, NULL, (void *)&ivec, -1);
113 EVP_Cipher(&ctx->dctx, tmp, C->checksum.data, 24);
115 EVP_DigestInit_ex(m, evp_md, NULL);
116 EVP_DigestUpdate(m, tmp, 8); /* confounder */
117 EVP_DigestUpdate(m, data, len);
118 EVP_DigestFinal_ex (m, res, NULL);
119 EVP_MD_CTX_destroy(m);
120 if(ct_memcmp(res, tmp + 8, sizeof(res)) != 0) {
121 krb5_clear_error_message (context);
122 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
124 memset(tmp, 0, sizeof(tmp));
125 memset(res, 0, sizeof(res));
131 static krb5_error_code
132 RSA_MD5_checksum(krb5_context context,
133 struct _krb5_key_data *key,
139 if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md5(), NULL) != 1)
140 krb5_abortx(context, "md5 checksum failed");
144 struct _krb5_checksum_type _krb5_checksum_rsa_md5 = {