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112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/*
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* keyraw.h -- raw key and signature access and conversion
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*
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* Copyright (c) 2005-2008, NLnet Labs. All rights reserved.
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*
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* See LICENSE for the license.
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*
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*/
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/**
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* \file
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*
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* raw key and signature access and conversion
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*
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* Since those functions heavily rely op cryptographic operations,
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* this module is dependent on openssl.
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*
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*/
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#ifndef LDNS_KEYRAW_H
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#define LDNS_KEYRAW_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if LDNS_BUILD_CONFIG_HAVE_SSL
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# include <openssl/ssl.h>
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# include <openssl/evp.h>
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#endif /* LDNS_BUILD_CONFIG_HAVE_SSL */
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/**
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* get the length of the keydata in bits
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* \param[in] keydata the raw key data
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* \param[in] len the length of the keydata
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* \param[in] alg the cryptographic algorithm this is a key for
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* \return the keysize in bits, or 0 on error
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*/
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size_t sldns_rr_dnskey_key_size_raw(const unsigned char *keydata,
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const size_t len, int alg);
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/**
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* Calculates keytag of DNSSEC key, operates on wireformat rdata.
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* \param[in] key the key as uncompressed wireformat rdata.
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* \param[in] keysize length of key data.
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* \return the keytag
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*/
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uint16_t sldns_calc_keytag_raw(uint8_t* key, size_t keysize);
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#if LDNS_BUILD_CONFIG_HAVE_SSL
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/**
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* Get the PKEY id for GOST, loads GOST into openssl as a side effect.
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* Only available if GOST is compiled into the library and openssl.
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* \return the gost id for EVP_CTX creation.
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*/
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int sldns_key_EVP_load_gost_id(void);
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/** Release the engine reference held for the GOST engine. */
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void sldns_key_EVP_unload_gost(void);
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/**
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* Like sldns_key_buf2dsa, but uses raw buffer.
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* \param[in] key the uncompressed wireformat of the key.
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* \param[in] len length of key data
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* \return a DSA * structure with the key material
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*/
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DSA *sldns_key_buf2dsa_raw(unsigned char* key, size_t len);
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/**
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* Converts a holding buffer with key material to EVP PKEY in openssl.
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* Only available if ldns was compiled with GOST.
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* \param[in] key data to convert
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* \param[in] keylen length of the key data
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* \return the key or NULL on error.
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*/
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EVP_PKEY* sldns_gost2pkey_raw(unsigned char* key, size_t keylen);
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/**
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* Converts a holding buffer with key material to EVP PKEY in openssl.
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* Only available if ldns was compiled with ECDSA.
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* \param[in] key data to convert
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* \param[in] keylen length of the key data
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* \param[in] algo precise algorithm to initialize ECC group values.
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* \return the key or NULL on error.
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*/
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EVP_PKEY* sldns_ecdsa2pkey_raw(unsigned char* key, size_t keylen, uint8_t algo);
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/**
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* Like sldns_key_buf2rsa, but uses raw buffer.
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* \param[in] key the uncompressed wireformat of the key.
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* \param[in] len length of key data
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* \return a RSA * structure with the key material
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*/
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RSA *sldns_key_buf2rsa_raw(unsigned char* key, size_t len);
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/**
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* Utility function to calculate hash using generic EVP_MD pointer.
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* \param[in] data the data to hash.
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* \param[in] len length of data.
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* \param[out] dest the destination of the hash, must be large enough.
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* \param[in] md the message digest to use.
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* \return true if worked, false on failure.
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*/
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int sldns_digest_evp(unsigned char* data, unsigned int len,
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unsigned char* dest, const EVP_MD* md);
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#endif /* LDNS_BUILD_CONFIG_HAVE_SSL */
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#ifdef __cplusplus
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}
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#endif
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#endif /* LDNS_KEYRAW_H */
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