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 <alejandro.zeise@seagate.com>
---
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;
+ } 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,
};
--
2.34.1On 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 <alejandro.zeise@seagate.com>
> ---
> 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);
Need to check for error from gcry_md_open and report it, and
free hash & hash->opaque
> + }
> +
> + return hash;
> +}
With regards,
Daniel
--
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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 <alejandro.zeise@seagate.com>
> ---
> 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);
int ret = gcry_md_write(*ctx, iov[i].iov_base, iov[i].iov_len);
if (ret != 0) {
error_setg(....)
return -1;
}
With regards,
Daniel
--
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> 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 <alejandro.zeise@seagate.com>
> > ---
> > 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);
>
> int ret = gcry_md_write(*ctx, iov[i].iov_base, iov[i].iov_len);
> if (ret != 0) {
> error_setg(....)
> return -1;
> }
>
>
> With regards,
> Daniel
gcry_md_write() is declared as void which is why I had no error variable present.
Thanks,
Alejandro
On Thu, Aug 08, 2024 at 06:24:10PM +0000, Alejandro Zeise wrote:
> > 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 <alejandro.zeise@seagate.com>
> > > ---
> > > 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);
> >
> > int ret = gcry_md_write(*ctx, iov[i].iov_base, iov[i].iov_len);
> > if (ret != 0) {
> > error_setg(....)
> > return -1;
> > }
> >
> >
> > With regards,
> > Daniel
>
> gcry_md_write() is declared as void which is why I had no error variable present.
Opps, yes, I'm getting confused with the other APIs.
With regards,
Daniel
--
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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 <alejandro.zeise@seagate.com>
> ---
> 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
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