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34 #include "krb5_locl.h"
40 static struct _krb5_key_type keytype_aes128 = {
41 ENCTYPE_AES128_CTS_HMAC_SHA1_96,
45 sizeof(struct _krb5_evp_schedule),
54 static struct _krb5_key_type keytype_aes256 = {
55 ENCTYPE_AES256_CTS_HMAC_SHA1_96,
59 sizeof(struct _krb5_evp_schedule),
68 struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes128 = {
69 CKSUMTYPE_HMAC_SHA1_96_AES_128,
70 "hmac-sha1-96-aes128",
73 F_KEYED | F_CPROOF | F_DERIVED,
74 _krb5_SP_HMAC_SHA1_checksum,
78 struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes256 = {
79 CKSUMTYPE_HMAC_SHA1_96_AES_256,
80 "hmac-sha1-96-aes256",
83 F_KEYED | F_CPROOF | F_DERIVED,
84 _krb5_SP_HMAC_SHA1_checksum,
88 static krb5_error_code
89 AES_PRF(krb5_context context,
94 struct _krb5_checksum_type *ct = crypto->et->checksum;
97 krb5_keyblock *derived;
99 result.cksumtype = ct->type;
100 ret = krb5_data_alloc(&result.checksum, ct->checksumsize);
102 krb5_set_error_message(context, ret, N_("malloc: out memory", ""));
106 ret = (*ct->checksum)(context, NULL, in->data, in->length, 0, &result);
108 krb5_data_free(&result.checksum);
112 if (result.checksum.length < crypto->et->blocksize)
113 krb5_abortx(context, "internal prf error");
116 ret = krb5_derive_key(context, crypto->key.key,
117 crypto->et->type, "prf", 3, &derived);
119 krb5_abortx(context, "krb5_derive_key");
121 ret = krb5_data_alloc(out, crypto->et->blocksize);
123 krb5_abortx(context, "malloc failed");
126 const EVP_CIPHER *c = (*crypto->et->keytype->evp)();
129 EVP_CIPHER_CTX_init(&ctx); /* ivec all zero */
130 EVP_CipherInit_ex(&ctx, c, NULL, derived->keyvalue.data, NULL, 1);
131 EVP_Cipher(&ctx, out->data, result.checksum.data,
132 crypto->et->blocksize);
133 EVP_CIPHER_CTX_cleanup(&ctx);
136 krb5_data_free(&result.checksum);
137 krb5_free_keyblock(context, derived);
142 struct _krb5_encryption_type _krb5_enctype_aes128_cts_hmac_sha1 = {
143 ETYPE_AES128_CTS_HMAC_SHA1_96,
144 "aes128-cts-hmac-sha1-96",
149 &_krb5_checksum_sha1,
150 &_krb5_checksum_hmac_sha1_aes128,
152 _krb5_evp_encrypt_cts,
157 struct _krb5_encryption_type _krb5_enctype_aes256_cts_hmac_sha1 = {
158 ETYPE_AES256_CTS_HMAC_SHA1_96,
159 "aes256-cts-hmac-sha1-96",
164 &_krb5_checksum_sha1,
165 &_krb5_checksum_hmac_sha1_aes256,
167 _krb5_evp_encrypt_cts,