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Thu, 08 Aug 2024 13:00:50 -0400 X-MC-Unique: LRed6nRON5C0BXfFlzRI_w-1 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 8AC4219772ED; Thu, 8 Aug 2024 17:00:48 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.163]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 5815B1955F35; Thu, 8 Aug 2024 17:00:45 +0000 (UTC) Date: Thu, 8 Aug 2024 18:00:41 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Alejandro Zeise Cc: qemu-arm@nongnu.org, kris.conklin@seagate.com, jonathan.henze@seagate.com, evan.burgess@seagate.com, clg@kaod.org, peter.maydell@linaro.org, qemu-devel@nongnu.org Subject: Re: [PATCH v4 03/15] crypto/hash-gcrypt: Implement new hash API Message-ID: References: <20240807195122.2827364-1-alejandro.zeise@seagate.com> <20240807195122.2827364-4-alejandro.zeise@seagate.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20240807195122.2827364-4-alejandro.zeise@seagate.com> User-Agent: Mutt/2.2.12 (2023-09-09) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org X-TUID: R942/lfqINju On Wed, Aug 07, 2024 at 07:51:10PM +0000, Alejandro Zeise wrote: > Implements the new hashing API in the gcrypt hash driver. > Supports creating/destroying a context, updating the context > with input data and obtaining an output hash. > > Signed-off-by: Alejandro Zeise > --- > crypto/hash-gcrypt.c | 79 ++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 79 insertions(+) > > diff --git a/crypto/hash-gcrypt.c b/crypto/hash-gcrypt.c > index 829e48258d..e05511cafa 100644 > --- a/crypto/hash-gcrypt.c > +++ b/crypto/hash-gcrypt.c > @@ -1,6 +1,7 @@ > /* > * QEMU Crypto hash algorithms > * > + * Copyright (c) 2024 Seagate Technology LLC and/or its Affiliates > * Copyright (c) 2016 Red Hat, Inc. > * > * This library is free software; you can redistribute it and/or > @@ -110,7 +111,85 @@ qcrypto_gcrypt_hash_bytesv(QCryptoHashAlgorithm alg, > return -1; > } > > +static > +QCryptoHash *qcrypto_gcrypt_hash_new(QCryptoHashAlgorithm alg, Error **errp) > +{ > + QCryptoHash *hash = NULL; > + > + if (!qcrypto_hash_supports(alg)) { > + error_setg(errp, > + "Unknown hash algorithm %d", > + alg); > + } else { > + hash = g_new(QCryptoHash, 1); > + hash->alg = alg; > + hash->opaque = g_new(gcry_md_hd_t, 1); > + > + gcry_md_open((gcry_md_hd_t *) hash->opaque, qcrypto_hash_alg_map[alg], 0); > + } > + > + return hash; > +} > + > +static > +void qcrypto_gcrypt_hash_free(QCryptoHash *hash) > +{ > + gcry_md_hd_t *ctx = hash->opaque; > + > + if (ctx) { > + gcry_md_close(*ctx); > + g_free(ctx); > + } > + > + g_free(hash); > +} > + > + > +static > +int qcrypto_gcrypt_hash_update(QCryptoHash *hash, > + const struct iovec *iov, > + size_t niov, > + Error **errp) > +{ > + gcry_md_hd_t *ctx = hash->opaque; > + > + for (int i = 0; i < niov; i++) { > + gcry_md_write(*ctx, iov[i].iov_base, iov[i].iov_len); > + } > + > + return 0; > +} > + > +static > +int qcrypto_gcrypt_hash_finalize(QCryptoHash *hash, > + uint8_t **result, > + size_t *result_len, > + Error **errp) > +{ > + unsigned char *digest; > + int ret = 0; > + gcry_md_hd_t *ctx = hash->opaque; > + > + *result_len = gcry_md_get_algo_dlen(qcrypto_hash_alg_map[hash->alg]); > + if (*result_len == 0) { > + error_setg(errp, "%s", > + "Unable to get hash length"); > + ret = -1; Same note about doing an immediate 'return -1' in error paths, to avoid extra else clauses. > + } else { > + *result = g_new(uint8_t, *result_len); > + > + /* Digest is freed by gcry_md_close(), copy it */ > + digest = gcry_md_read(*ctx, 0); > + memcpy(*result, digest, *result_len); > + } > + > + return ret; > +} > > QCryptoHashDriver qcrypto_hash_lib_driver = { > .hash_bytesv = qcrypto_gcrypt_hash_bytesv, > + .hash_new = qcrypto_gcrypt_hash_new, > + .hash_update = qcrypto_gcrypt_hash_update, > + .hash_finalize = qcrypto_gcrypt_hash_finalize, > + .hash_free = qcrypto_gcrypt_hash_free, > }; > -- > 2.34.1 > With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|