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| -rw-r--r-- | include/iprt/crypto/digest.h | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/include/iprt/crypto/digest.h b/include/iprt/crypto/digest.h new file mode 100644 index 00000000..a73e84d6 --- /dev/null +++ b/include/iprt/crypto/digest.h @@ -0,0 +1,321 @@ +/** @file + * IPRT - Crypto - Cryptographic Hash / Message Digest. + */ + +/* + * Copyright (C) 2014-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + +#ifndef IPRT_INCLUDED_crypto_digest_h +#define IPRT_INCLUDED_crypto_digest_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/asn1.h> + + +RT_C_DECLS_BEGIN + +/** @defgroup grp_rt_crdigest RTCrDigest - Crypographic Hash / Message Digest API. + * @ingroup grp_rt + * @{ + */ + +/** + * Cryptographic hash / message digest provider descriptor. + * + * This gives the basic details and identifiers of the algorithm as well as + * function pointers to the implementation. + */ +typedef struct RTCRDIGESTDESC +{ + /** The message digest provider name. */ + const char *pszName; + /** The object ID string. */ + const char *pszObjId; + /** Pointer to a NULL terminated table of alias object IDs (optional). */ + const char * const *papszObjIdAliases; + /** The IPRT digest type. */ + RTDIGESTTYPE enmType; + /** The max size of the final hash (binary). */ + uint32_t cbHash; + /** The size of the state. */ + uint32_t cbState; + /** Flags, RTCRDIGESTDESC_F_XXX. */ + uint32_t fFlags; + + /** + * Allocates the digest data. + */ + DECLCALLBACKMEMBER(void *, pfnNew)(void); + + /** + * Frees the digest data. + * + * @param pvState The opaque message digest state. + */ + DECLCALLBACKMEMBER(void, pfnFree)(void *pvState); + + /** + * Updates the digest with more data. + * + * @param pvState The opaque message digest state. + * @param pvData The data to add to the digest. + * @param cbData The amount of data to add to the digest. + */ + DECLCALLBACKMEMBER(void, pfnUpdate)(void *pvState, const void *pvData, size_t cbData); + + /** + * Finalizes the digest calculation. + * + * @param pvState The opaque message digest state. + * @param pbHash Where to store the output digest. This buffer is at + * least RTCRDIGESTDESC::cbHash bytes large. + */ + DECLCALLBACKMEMBER(void, pfnFinal)(void *pvState, uint8_t *pbHash); + + /** + * (Re-)Initializes the digest. Optional. + * + * Optional, RT_BZERO will be used if NULL. + * + * @returns IPRT status code. + * @param pvState The opaque message digest state. + * @param pvOpaque Opaque algortihm specific parameter. + * @param fReInit Set if this is a re-init call. + */ + DECLCALLBACKMEMBER(int, pfnInit)(void *pvState, void *pvOpaque, bool fReInit); + + /** + * Deletes the message digest state. + * + * Optional, memset will be used if NULL. + * + * @param pvState The opaque message digest state. + */ + DECLCALLBACKMEMBER(void, pfnDelete)(void *pvState); + + /** + * Clones the message digest state. + * + * Optional, memcpy will be used if NULL. + * + * @returns IPRT status code. + * @param pvState The opaque message digest state (destination). + * @param pvSrcState The opaque message digest state to clone (source). + */ + DECLCALLBACKMEMBER(int, pfnClone)(void *pvState, void const *pvSrcState); + + /** + * Gets the hash size. + * + * Optional, if not provided RTCRDIGESTDESC::cbHash will be returned. If + * provided though, RTCRDIGESTDESC::cbHash must be set to the largest possible + * hash size. + * + * @returns The hash size. + * @param pvState The opaque message digest state. + */ + DECLCALLBACKMEMBER(uint32_t, pfnGetHashSize)(void *pvState); + + /** + * Gets the digest type (when enmType is RTDIGESTTYPE_UNKNOWN). + * + * @returns The hash size. + * @param pvState The opaque message digest state. + */ + DECLCALLBACKMEMBER(RTDIGESTTYPE, pfnGetDigestType)(void *pvState); +} RTCRDIGESTDESC; +/** Pointer to const message digest details and vtable. */ +typedef RTCRDIGESTDESC const *PCRTCRDIGESTDESC; + +/** @name RTCRDIGESTDESC_F_XXX + * @{ */ +/** Digest is deprecated. */ +#define RTCRDIGESTDESC_F_DEPRECATED RT_BIT_32(0) +/** Digest is compromised. */ +#define RTCRDIGESTDESC_F_COMPROMISED RT_BIT_32(1) +/** Digest is severely compromised. */ +#define RTCRDIGESTDESC_F_SERVERELY_COMPROMISED RT_BIT_32(2) +/** @} */ + +/** + * Finds a cryptographic hash / message digest descriptor by object identifier + * string. + * + * @returns Pointer to the message digest details & vtable if found. NULL if + * not found. + * @param pszObjId The dotted object identifier string of the message + * digest algorithm. + * @param ppvOpaque Where to return an opaque implementation specfici + * sub-type indicator that can be passed to + * RTCrDigestCreate. This is optional, fewer + * algortihms are available if not specified. + */ +RTDECL(PCRTCRDIGESTDESC) RTCrDigestFindByObjIdString(const char *pszObjId, void **ppvOpaque); + +/** + * Finds a cryptographic hash / message digest descriptor by object identifier + * ASN.1 object. + * + * @returns Pointer to the message digest details & vtable if found. NULL if + * not found. + * @param pObjId The ASN.1 object ID of the message digest algorithm. + * @param ppvOpaque Where to return an opaque implementation specfici + * sub-type indicator that can be passed to + * RTCrDigestCreate. This is optional, fewer + * algortihms are available if not specified. + */ +RTDECL(PCRTCRDIGESTDESC) RTCrDigestFindByObjId(PCRTASN1OBJID pObjId, void **ppvOpaque); + +RTDECL(PCRTCRDIGESTDESC) RTCrDigestFindByType(RTDIGESTTYPE enmDigestType); +RTDECL(int) RTCrDigestCreateByObjIdString(PRTCRDIGEST phDigest, const char *pszObjId); +RTDECL(int) RTCrDigestCreateByObjId(PRTCRDIGEST phDigest, PCRTASN1OBJID pObjId); +RTDECL(int) RTCrDigestCreateByType(PRTCRDIGEST phDigest, RTDIGESTTYPE enmDigestType); + + +/** + * @returns IPRT status code. + * @retval VINF_SUCCESS on success. + * @retval VINF_CR_DIGEST_DEPRECATED on success from a deprecated hash algorithm. + * @retval VINF_CR_DIGEST_COMPROMISED on success from a compromised hash algorithm. + * @retval VINF_CR_DIGEST_SEVERELY_COMPROMISED on success from a severely compromised hash algorithm. + */ +RTDECL(int) RTCrDigestCreate(PRTCRDIGEST phDigest, PCRTCRDIGESTDESC pDesc, void *pvOpaque); +/** + * @returns IPRT status code. + * @retval VINF_SUCCESS on success. + * @retval VINF_CR_DIGEST_DEPRECATED on success from a deprecated hash algorithm. + * @retval VINF_CR_DIGEST_COMPROMISED on success from a compromised hash algorithm. + * @retval VINF_CR_DIGEST_SEVERELY_COMPROMISED on success from a severely compromised hash algorithm. + */ +RTDECL(int) RTCrDigestClone(PRTCRDIGEST phDigest, RTCRDIGEST hSrc); +/** + * Resets the digest to start calculating a new digest. + */ +RTDECL(int) RTCrDigestReset(RTCRDIGEST hDigest); + +/** + * Retains a references to the digest. + * + * @returns New reference count. UINT32_MAX if invalid handle. + * @param hDigest Handle to the digest. + */ +RTDECL(uint32_t) RTCrDigestRetain(RTCRDIGEST hDigest); +/** + * Releases a references to the digest. + * + * @returns New reference count. UINT32_MAX if invalid handle. + * @param hDigest Handle to the digest. NIL is ignored (returns 0). + */ +RTDECL(uint32_t) RTCrDigestRelease(RTCRDIGEST hDigest); + +/** + * Updates the digest with more message data. + * + * @returns IPRT status code. + * @param hDigest Handle to the digest. + * @param pvData Pointer to the message data. + * @param cbData The number of bytes of data @a pvData points to. + */ +RTDECL(int) RTCrDigestUpdate(RTCRDIGEST hDigest, void const *pvData, size_t cbData); + +/** + * Updates the digest with more message data from the given VFS file handle. + * + * @returns IPRT status code. + * @param hDigest Handle to the digest. + * @param hVfsFile Handle to the VFS file. + * @param fRewindFile Rewind to the start of the file if @a true, start + * consumption at the current file position if @a false. + */ +RTDECL(int) RTCrDigestUpdateFromVfsFile(RTCRDIGEST hDigest, RTVFSFILE hVfsFile, bool fRewindFile); + +/** + * Finalizes the hash calculation, copying out the resulting hash value. + * + * This can be called more than once and will always return the same result. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS on success. + * @retval VINF_CR_DIGEST_DEPRECATED on success from a deprecated hash algorithm. + * @retval VINF_CR_DIGEST_COMPROMISED on success from a compromised hash algorithm. + * @retval VINF_CR_DIGEST_SEVERELY_COMPROMISED on success from a severely compromised hash algorithm. + * @retval VINF_BUFFER_UNDERFLOW if the supplied buffer is too big. + * @retval VERR_BUFFER_OVERFLOW if the supplied buffer is too small. + * @retval VERR_INVALID_STATE if there is nothing to finalize. + * + * @param hDigest The digest handle. + * @param pvHash Where to return the hash. Optional. + * @param cbHash The hash size. Optional. + */ +RTDECL(int) RTCrDigestFinal(RTCRDIGEST hDigest, void *pvHash, size_t cbHash); + +RTDECL(bool) RTCrDigestMatch(RTCRDIGEST hDigest, void const *pvHash, size_t cbHash); +RTDECL(uint8_t const *) RTCrDigestGetHash(RTCRDIGEST hDigest); +RTDECL(uint32_t) RTCrDigestGetHashSize(RTCRDIGEST hDigest); +RTDECL(uint64_t) RTCrDigestGetConsumedSize(RTCRDIGEST hDigest); +RTDECL(bool) RTCrDigestIsFinalized(RTCRDIGEST hDigest); +RTDECL(RTDIGESTTYPE) RTCrDigestGetType(RTCRDIGEST hDigest); +RTDECL(const char *) RTCrDigestGetAlgorithmOid(RTCRDIGEST hDigest); + +/** + * Gets the flags for the algorithm. + * + * @returns RTCRDIGESTDESC_F_XXX, UINT32_MAX on invalid handle. + * @param hDigest The digest handle. + */ +RTDECL(uint32_t) RTCrDigestGetFlags(RTCRDIGEST hDigest); + + +/** + * Translates an IPRT digest type value to an OID. + * + * @returns Dotted OID string on success, NULL if not translatable. + * @param enmDigestType The IPRT digest type value to convert. + */ +RTDECL(const char *) RTCrDigestTypeToAlgorithmOid(RTDIGESTTYPE enmDigestType); + +/** + * Translates an IPRT digest type value to a name/descriptive string. + * + * The purpose here is for human readable output rather than machine readable + * output, i.e. the names aren't set in stone. + * + * @returns Pointer to read-only string, NULL if unknown type. + * @param enmDigestType The IPRT digest type value to convert. + */ +RTDECL(const char *) RTCrDigestTypeToName(RTDIGESTTYPE enmDigestType); + +/** + * Translates an IPRT digest type value to a hash size. + * + * @returns Hash size (in bytes). + * @param enmDigestType The IPRT digest type value to convert. + */ +RTDECL(uint32_t) RTCrDigestTypeToHashSize(RTDIGESTTYPE enmDigestType); + +/** @} */ + +RT_C_DECLS_END + +#endif /* !IPRT_INCLUDED_crypto_digest_h */ + |