# MIT Kerberos Documentation

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# krb5_c_verify_checksum - Verify a checksum (operates on keyblock).

krb5_error_code `krb5_c_verify_checksum`(krb5_context context, const krb5_keyblock * key, krb5_keyusage usage, const krb5_data * data, const krb5_checksum * cksum, krb5_boolean * valid)

param: | [in] context - Library context [in] key - Encryption key for a keyed checksum [in] usage - key usage [in] data - Data to be used to compute a new checksum using key to compare cksum against [in] cksum - Checksum to be verified [out] valid - Non-zero for success, zero for failure

retval: | 0 Success; otherwise - Kerberos error codes

This function verifies that cksum is a valid checksum for data . If the checksum type of cksum is a keyed checksum, key is used to verify the checksum. If the checksum type in cksum is 0 and key is not NULL, the mandatory checksum type for key will be used. The actual checksum key will be derived from key and usage if key derivation is specified for the checksum type.

Note

This function is similar to `krb5_k_verify_checksum()` , but operates on keyblock key .