aa0c1fc1c0
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@1318 ec53bebd-3082-4978-b11e-865c3cabbd6b
52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
#include <krb5_locl.h>
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#include "md4.h"
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RCSID("$Id$");
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krb5_error_code
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krb5_create_checksum (krb5_context context,
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krb5_cksumtype type,
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void *ptr,
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size_t len,
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Checksum *result)
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{
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struct md4 m;
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if (type != CKSUMTYPE_RSA_MD4)
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abort ();
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result->cksumtype = CKSUMTYPE_RSA_MD4;
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result->checksum.length = 16;
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result->checksum.data = malloc(16);
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if (result->checksum.data == NULL)
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return ENOMEM;
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md4_init(&m);
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md4_update(&m, ptr, len);
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md4_finito (&m, result->checksum.data);
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return 0;
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}
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krb5_error_code
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krb5_verify_checksum (krb5_context context,
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void *ptr,
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size_t len,
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Checksum *cksum)
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{
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struct md4 m;
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u_char csum[16];
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if (cksum->cksumtype != CKSUMTYPE_RSA_MD4)
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return KRB5KRB_AP_ERR_INAPP_CKSUM;
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if (cksum->checksum.length != 16)
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return KRB5KRB_AP_ERR_MODIFIED;
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md4_init (&m);
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md4_update (&m, ptr, len);
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md4_finito (&m, csum);
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if (memcmp (cksum->checksum.data, csum, 16) == 0)
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return 0;
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else
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return KRB5KRB_AP_ERR_MODIFIED;
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}
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