diff --git a/crypto/hash.c b/crypto/hash.c index 4a265582b8..0c8548c568 100644 --- a/crypto/hash.c +++ b/crypto/hash.c @@ -1,6 +1,7 @@ /* * QEMU Crypto hash algorithms * + * Copyright (c) 2024 Seagate Technology LLC and/or its Affiliates * Copyright (c) 2015 Red Hat, Inc. * * This library is free software; you can redistribute it and/or @@ -19,6 +20,8 @@ */ #include "qemu/osdep.h" +#include "qapi/error.h" +#include "qapi-types-crypto.h" #include "crypto/hash.h" #include "hashpriv.h" @@ -45,23 +48,18 @@ int qcrypto_hash_bytesv(QCryptoHashAlgo alg, size_t *resultlen, Error **errp) { -#ifdef CONFIG_AF_ALG - int ret; - /* - * TODO: - * Maybe we should treat some afalg errors as fatal - */ - ret = qcrypto_hash_afalg_driver.hash_bytesv(alg, iov, niov, - result, resultlen, - NULL); - if (ret == 0) { - return ret; - } -#endif + g_autoptr(QCryptoHash) ctx = qcrypto_hash_new(alg, errp); - return qcrypto_hash_lib_driver.hash_bytesv(alg, iov, niov, - result, resultlen, - errp); + if (!ctx) { + return -1; + } + + if (qcrypto_hash_updatev(ctx, iov, niov, errp) < 0 || + qcrypto_hash_finalize_bytes(ctx, result, resultlen, errp) < 0) { + return -1; + } + + return 0; } @@ -77,29 +75,130 @@ int qcrypto_hash_bytes(QCryptoHashAlgo alg, return qcrypto_hash_bytesv(alg, &iov, 1, result, resultlen, errp); } +int qcrypto_hash_updatev(QCryptoHash *hash, + const struct iovec *iov, + size_t niov, + Error **errp) +{ + QCryptoHashDriver *drv = hash->driver; + + return drv->hash_update(hash, iov, niov, errp); +} + +int qcrypto_hash_update(QCryptoHash *hash, + const char *buf, + size_t len, + Error **errp) +{ + struct iovec iov = { .iov_base = (char *)buf, .iov_len = len }; + + return qcrypto_hash_updatev(hash, &iov, 1, errp); +} + +QCryptoHash *qcrypto_hash_new(QCryptoHashAlgo alg, Error **errp) +{ + QCryptoHash *hash = NULL; + + if (!qcrypto_hash_supports(alg)) { + error_setg(errp, "Unsupported hash algorithm %s", + QCryptoHashAlgo_str(alg)); + return NULL; + } + +#ifdef CONFIG_AF_ALG + hash = qcrypto_hash_afalg_driver.hash_new(alg, NULL); + if (hash) { + hash->driver = &qcrypto_hash_afalg_driver; + return hash; + } +#endif + + hash = qcrypto_hash_lib_driver.hash_new(alg, errp); + if (!hash) { + return NULL; + } + + hash->driver = &qcrypto_hash_lib_driver; + return hash; +} + +void qcrypto_hash_free(QCryptoHash *hash) +{ + QCryptoHashDriver *drv; + + if (hash) { + drv = hash->driver; + drv->hash_free(hash); + } +} + +int qcrypto_hash_finalize_bytes(QCryptoHash *hash, + uint8_t **result, + size_t *result_len, + Error **errp) +{ + QCryptoHashDriver *drv = hash->driver; + + return drv->hash_finalize(hash, result, result_len, errp); +} + static const char hex[] = "0123456789abcdef"; +int qcrypto_hash_finalize_digest(QCryptoHash *hash, + char **digest, + Error **errp) +{ + int ret; + g_autofree uint8_t *result = NULL; + size_t resultlen = 0; + size_t i; + + ret = qcrypto_hash_finalize_bytes(hash, &result, &resultlen, errp); + if (ret == 0) { + *digest = g_new0(char, (resultlen * 2) + 1); + for (i = 0 ; i < resultlen ; i++) { + (*digest)[(i * 2)] = hex[(result[i] >> 4) & 0xf]; + (*digest)[(i * 2) + 1] = hex[result[i] & 0xf]; + } + (*digest)[resultlen * 2] = '\0'; + } + + return ret; +} + +int qcrypto_hash_finalize_base64(QCryptoHash *hash, + char **base64, + Error **errp) +{ + int ret; + g_autofree uint8_t *result = NULL; + size_t resultlen = 0; + + ret = qcrypto_hash_finalize_bytes(hash, &result, &resultlen, errp); + if (ret == 0) { + *base64 = g_base64_encode(result, resultlen); + } + + return ret; +} + int qcrypto_hash_digestv(QCryptoHashAlgo alg, const struct iovec *iov, size_t niov, char **digest, Error **errp) { - uint8_t *result = NULL; - size_t resultlen = 0; - size_t i; + g_autoptr(QCryptoHash) ctx = qcrypto_hash_new(alg, errp); - if (qcrypto_hash_bytesv(alg, iov, niov, &result, &resultlen, errp) < 0) { + if (!ctx) { return -1; } - *digest = g_new0(char, (resultlen * 2) + 1); - for (i = 0 ; i < resultlen ; i++) { - (*digest)[(i * 2)] = hex[(result[i] >> 4) & 0xf]; - (*digest)[(i * 2) + 1] = hex[result[i] & 0xf]; + if (qcrypto_hash_updatev(ctx, iov, niov, errp) < 0 || + qcrypto_hash_finalize_digest(ctx, digest, errp) < 0) { + return -1; } - (*digest)[resultlen * 2] = '\0'; - g_free(result); + return 0; } @@ -120,15 +219,17 @@ int qcrypto_hash_base64v(QCryptoHashAlgo alg, char **base64, Error **errp) { - uint8_t *result = NULL; - size_t resultlen = 0; + g_autoptr(QCryptoHash) ctx = qcrypto_hash_new(alg, errp); - if (qcrypto_hash_bytesv(alg, iov, niov, &result, &resultlen, errp) < 0) { + if (!ctx) { + return -1; + } + + if (qcrypto_hash_updatev(ctx, iov, niov, errp) < 0 || + qcrypto_hash_finalize_base64(ctx, base64, errp) < 0) { return -1; } - *base64 = g_base64_encode(result, resultlen); - g_free(result); return 0; }