Re: [Qemu-devel] [PATCH for-2.9 v2 6/7] crypto: support HMAC algorithms based on nettle

["Daniel P. Berrange" <berrange@redhat.com>]

On Mon, Dec 12, 2016 at 04:08:11PM +0800, Longpeng(Mike) wrote:
> This patch add nettle-backed HMAC algorithms support
> 
> Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
> ---
>  crypto/hmac-nettle.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 115 insertions(+), 3 deletions(-)
> 
> diff --git a/crypto/hmac-nettle.c b/crypto/hmac-nettle.c
> index 7a9cd2e..a082bc0 100644
> --- a/crypto/hmac-nettle.c
> +++ b/crypto/hmac-nettle.c
> @@ -15,9 +15,66 @@
>  #include "qemu/osdep.h"
>  #include "qapi/error.h"
>  #include "crypto/hmac.h"
> +#include <nettle/hmac.h>
> +
> +typedef void (*qcrypto_nettle_hmac_setkey)(void *ctx,
> +        size_t key_length, const uint8_t *key);
> +
> +typedef void (*qcrypto_nettle_hmac_update)(void *ctx,
> +        size_t length, const uint8_t *data);
> +
> +typedef void (*qcrypto_nettle_hmac_digest)(void *ctx,
> +        size_t length, uint8_t *digest);
> +
> +typedef struct QCryptoHmacNettle QCryptoHmacNettle;
> +struct QCryptoHmacNettle {
> +    union qcrypto_nettle_hmac_ctx {
> +        struct hmac_md5_ctx md5_ctx;
> +        struct hmac_sha1_ctx sha1_ctx;
> +        struct hmac_sha256_ctx sha256_ctx;
> +        struct hmac_sha512_ctx sha512_ctx;
> +    } u;
> +};
> +
> +struct qcrypto_nettle_hmac_alg {
> +    qcrypto_nettle_hmac_setkey setkey;
> +    qcrypto_nettle_hmac_update update;
> +    qcrypto_nettle_hmac_digest digest;
> +    size_t len;
> +} qcrypto_hmac_alg_map[QCRYPTO_HMAC_ALG__MAX] = {
> +    [QCRYPTO_HMAC_ALG_MD5] = {
> +        .setkey = (qcrypto_nettle_hmac_setkey)hmac_md5_set_key,
> +        .update = (qcrypto_nettle_hmac_update)hmac_md5_update,
> +        .digest = (qcrypto_nettle_hmac_digest)hmac_md5_digest,
> +        .len = MD5_DIGEST_SIZE,
> +    },
> +    [QCRYPTO_HMAC_ALG_SHA1] = {
> +        .setkey = (qcrypto_nettle_hmac_setkey)hmac_sha1_set_key,
> +        .update = (qcrypto_nettle_hmac_update)hmac_sha1_update,
> +        .digest = (qcrypto_nettle_hmac_digest)hmac_sha1_digest,
> +        .len = SHA1_DIGEST_SIZE,
> +    },
> +    [QCRYPTO_HMAC_ALG_SHA256] = {
> +        .setkey = (qcrypto_nettle_hmac_setkey)hmac_sha256_set_key,
> +        .update = (qcrypto_nettle_hmac_update)hmac_sha256_update,
> +        .digest = (qcrypto_nettle_hmac_digest)hmac_sha256_digest,
> +        .len = SHA256_DIGEST_SIZE,
> +    },
> +    [QCRYPTO_HMAC_ALG_SHA512] = {
> +        .setkey = (qcrypto_nettle_hmac_setkey)hmac_sha512_set_key,
> +        .update = (qcrypto_nettle_hmac_update)hmac_sha512_update,
> +        .digest = (qcrypto_nettle_hmac_digest)hmac_sha512_digest,
> +        .len = SHA512_DIGEST_SIZE,
> +    },
> +};

Can you implement all 7 hash algorithms supported by QEMU.


Regards,
Daniel
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