2 * validator/val_secalgo.h - validator security algorithm functions.
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39 * This file contains helper functions for the validator module.
40 * The functions take buffers with raw data and convert to library calls.
43 #ifndef VALIDATOR_VAL_SECALGO_H
44 #define VALIDATOR_VAL_SECALGO_H
47 /** Return size of nsec3 hash algorithm, 0 if not supported */
48 size_t nsec3_hash_algo_size_supported(int id);
51 * Hash a single hash call of an NSEC3 hash algorithm.
52 * Iterations and salt are done by the caller.
53 * @param algo: nsec3 hash algorithm.
54 * @param buf: the buffer to digest
55 * @param len: length of buffer to digest.
56 * @param res: result stored here (must have sufficient space).
57 * @return false on failure.
59 int secalgo_nsec3_hash(int algo, unsigned char* buf, size_t len,
63 * Calculate the sha256 hash for the data buffer into the result.
64 * @param buf: buffer to digest.
65 * @param len: length of the buffer to digest.
66 * @param res: result is stored here (space 256/8 bytes).
68 void secalgo_hash_sha256(unsigned char* buf, size_t len, unsigned char* res);
71 * Return size of DS digest according to its hash algorithm.
72 * @param algo: DS digest algo.
73 * @return size in bytes of digest, or 0 if not supported.
75 size_t ds_digest_size_supported(int algo);
78 * @param algo: the DS digest algo
79 * @param buf: the buffer to digest
80 * @param len: length of buffer to digest.
81 * @param res: result stored here (must have sufficient space).
82 * @return false on failure.
84 int secalgo_ds_digest(int algo, unsigned char* buf, size_t len,
87 /** return true if DNSKEY algorithm id is supported */
88 int dnskey_algo_id_is_supported(int id);
91 * Check a canonical sig+rrset and signature against a dnskey
92 * @param buf: buffer with data to verify, the first rrsig part and the
93 * canonicalized rrset.
94 * @param algo: DNSKEY algorithm.
95 * @param sigblock: signature rdata field from RRSIG
96 * @param sigblock_len: length of sigblock data.
97 * @param key: public key data from DNSKEY RR.
98 * @param keylen: length of keydata.
99 * @param reason: bogus reason in more detail.
100 * @return secure if verification succeeded, bogus on crypto failure,
101 * unchecked on format errors and alloc failures.
103 enum sec_status verify_canonrrset(struct sldns_buffer* buf, int algo,
104 unsigned char* sigblock, unsigned int sigblock_len,
105 unsigned char* key, unsigned int keylen, char** reason);
107 #endif /* VALIDATOR_VAL_SECALGO_H */