193 lines
6.1 KiB
C
193 lines
6.1 KiB
C
/*
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* QEMU Crypto hash algorithms
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*
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* Copyright (c) 2015 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QCRYPTO_HASH_H
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#define QCRYPTO_HASH_H
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#include "qapi-types.h"
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/* See also "QCryptoHashAlgorithm" defined in qapi/crypto.json */
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/**
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* qcrypto_hash_supports:
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* @alg: the hash algorithm
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*
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* Determine if @alg hash algorithm is supported by the
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* current configured build.
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*
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* Returns: true if the algorithm is supported, false otherwise
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*/
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gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg);
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/**
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* qcrypto_hash_digest_len:
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* @alg: the hash algorithm
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*
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* Determine the size of the hash digest in bytes
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*
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* Returns: the digest length in bytes
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*/
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size_t qcrypto_hash_digest_len(QCryptoHashAlgorithm alg);
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/**
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* qcrypto_hash_bytesv:
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* @alg: the hash algorithm
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* @iov: the array of memory regions to hash
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* @niov: the length of @iov
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* @result: pointer to hold output hash
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* @resultlen: pointer to hold length of @result
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* @errp: pointer to a NULL-initialized error object
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*
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* Computes the hash across all the memory regions
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* present in @iov. The @result pointer will be
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* filled with raw bytes representing the computed
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* hash, which will have length @resultlen. The
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* memory pointer in @result must be released
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* with a call to g_free() when no longer required.
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*
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* Returns: 0 on success, -1 on error
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*/
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int qcrypto_hash_bytesv(QCryptoHashAlgorithm alg,
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const struct iovec *iov,
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size_t niov,
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uint8_t **result,
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size_t *resultlen,
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Error **errp);
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/**
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* qcrypto_hash_bytes:
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* @alg: the hash algorithm
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* @buf: the memory region to hash
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* @len: the length of @buf
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* @result: pointer to hold output hash
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* @resultlen: pointer to hold length of @result
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* @errp: pointer to a NULL-initialized error object
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*
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* Computes the hash across all the memory region
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* @buf of length @len. The @result pointer will be
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* filled with raw bytes representing the computed
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* hash, which will have length @resultlen. The
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* memory pointer in @result must be released
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* with a call to g_free() when no longer required.
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*
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* Returns: 0 on success, -1 on error
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*/
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int qcrypto_hash_bytes(QCryptoHashAlgorithm alg,
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const char *buf,
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size_t len,
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uint8_t **result,
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size_t *resultlen,
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Error **errp);
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/**
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* qcrypto_hash_digestv:
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* @alg: the hash algorithm
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* @iov: the array of memory regions to hash
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* @niov: the length of @iov
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* @digest: pointer to hold output hash
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* @errp: pointer to a NULL-initialized error object
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*
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* Computes the hash across all the memory regions
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* present in @iov. The @digest pointer will be
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* filled with the printable hex digest of the computed
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* hash, which will be terminated by '\0'. The
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* memory pointer in @digest must be released
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* with a call to g_free() when no longer required.
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*
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* Returns: 0 on success, -1 on error
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*/
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int qcrypto_hash_digestv(QCryptoHashAlgorithm alg,
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const struct iovec *iov,
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size_t niov,
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char **digest,
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Error **errp);
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/**
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* qcrypto_hash_digest:
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* @alg: the hash algorithm
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* @buf: the memory region to hash
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* @len: the length of @buf
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* @digest: pointer to hold output hash
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* @errp: pointer to a NULL-initialized error object
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*
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* Computes the hash across all the memory region
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* @buf of length @len. The @digest pointer will be
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* filled with the printable hex digest of the computed
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* hash, which will be terminated by '\0'. The
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* memory pointer in @digest must be released
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* with a call to g_free() when no longer required.
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*
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* Returns: 0 on success, -1 on error
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*/
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int qcrypto_hash_digest(QCryptoHashAlgorithm alg,
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const char *buf,
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size_t len,
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char **digest,
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Error **errp);
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/**
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* qcrypto_hash_base64v:
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* @alg: the hash algorithm
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* @iov: the array of memory regions to hash
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* @niov: the length of @iov
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* @base64: pointer to hold output hash
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* @errp: pointer to a NULL-initialized error object
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*
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* Computes the hash across all the memory regions
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* present in @iov. The @base64 pointer will be
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* filled with the base64 encoding of the computed
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* hash, which will be terminated by '\0'. The
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* memory pointer in @base64 must be released
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* with a call to g_free() when no longer required.
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*
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* Returns: 0 on success, -1 on error
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*/
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int qcrypto_hash_base64v(QCryptoHashAlgorithm alg,
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const struct iovec *iov,
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size_t niov,
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char **base64,
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Error **errp);
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/**
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* qcrypto_hash_base64:
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* @alg: the hash algorithm
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* @buf: the memory region to hash
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* @len: the length of @buf
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* @base64: pointer to hold output hash
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* @errp: pointer to a NULL-initialized error object
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*
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* Computes the hash across all the memory region
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* @buf of length @len. The @base64 pointer will be
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* filled with the base64 encoding of the computed
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* hash, which will be terminated by '\0'. The
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* memory pointer in @base64 must be released
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* with a call to g_free() when no longer required.
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*
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* Returns: 0 on success, -1 on error
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*/
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int qcrypto_hash_base64(QCryptoHashAlgorithm alg,
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const char *buf,
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size_t len,
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char **base64,
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Error **errp);
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#endif /* QCRYPTO_HASH_H */
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