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#include "k5-int.h"
#include "rsa-md5.h"
/* Windows needs to these prototypes for the assignment below */
krb5_error_code
krb5_md5_sum_func PROTOTYPE((
krb5_const krb5_pointer in,
krb5_const size_t in_length,
krb5_const krb5_pointer seed,
krb5_const size_t seed_length,
krb5_checksum FAR *outcksum));
krb5_error_code
krb5_md5_verify_func PROTOTYPE((
krb5_const krb5_checksum FAR *cksum,
krb5_const krb5_pointer in,
krb5_const size_t in_length,
krb5_const krb5_pointer seed,
krb5_const size_t seed_length));
krb5_error_code
krb5_md5_sum_func(in, in_length, seed, seed_length, outcksum)
krb5_const krb5_pointer in;
krb5_const size_t in_length;
krb5_const krb5_pointer seed;
krb5_const size_t seed_length;
krb5_checksum FAR *outcksum;
{
krb5_octet *input = (krb5_octet *)in;
krb5_MD5_CTX working;
if (outcksum->length < RSA_MD5_CKSUM_LENGTH)
return KRB5_BAD_MSIZE;
krb5_MD5Init(&working);
krb5_MD5Update(&working, input, in_length);
krb5_MD5Final(&working);
outcksum->checksum_type = CKSUMTYPE_RSA_MD5;
outcksum->length = RSA_MD5_CKSUM_LENGTH;
memcpy((char *)outcksum->contents, (char *)&working.digest[0], 16);
memset((char *)&working, 0, sizeof(working));
return 0;
}
krb5_error_code
krb5_md5_verify_func(cksum, in, in_length, seed, seed_length)
krb5_const krb5_checksum FAR *cksum;
krb5_const krb5_pointer in;
krb5_const size_t in_length;
krb5_const krb5_pointer seed;
krb5_const size_t seed_length;
{
krb5_octet *input = (krb5_octet *)in;
krb5_MD5_CTX working;
krb5_error_code retval;
retval = 0;
if (cksum->checksum_type == CKSUMTYPE_RSA_MD5) {
if (cksum->length == RSA_MD5_CKSUM_LENGTH) {
krb5_MD5Init(&working);
krb5_MD5Update(&working, input, in_length);
krb5_MD5Final(&working);
if (memcmp((char *) cksum->contents,
(char *) &working.digest[0],
RSA_MD5_CKSUM_LENGTH))
retval = KRB5KRB_AP_ERR_BAD_INTEGRITY;
memset((char *)&working, 0, sizeof(working));
}
else
retval = KRB5KRB_AP_ERR_BAD_INTEGRITY;
}
else
retval = KRB5KRB_AP_ERR_INAPP_CKSUM;
return retval;
}
krb5_checksum_entry rsa_md5_cksumtable_entry = {
0,
krb5_md5_sum_func,
krb5_md5_verify_func,
RSA_MD5_CKSUM_LENGTH,
1, /* is collision proof */
0, /* doesn't use key */
};
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