Re: [Qemu-devel] [PATCH for-4.1 2/2] crypto: fix function signatures for nettle 2.7 vs 3

["Alex Bennée" <alex.bennee@linaro.org>]

Daniel P. Berrangé <berrange@redhat.com> writes:

> Nettle version 2.7.x used 'unsigned int' instead of 'size_t' for length
> parameters in functions. Use a local typedef so that we can build with
> the correct signature depending on nettle version, as we already do in
> the cipher code.
>
> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  crypto/hash-nettle.c | 12 +++++++++---
>  crypto/hmac-nettle.c | 17 +++++++++++++----
>  2 files changed, 22 insertions(+), 7 deletions(-)
>
> diff --git a/crypto/hash-nettle.c b/crypto/hash-nettle.c
> index 96f186f442..6ffb9c3db7 100644
> --- a/crypto/hash-nettle.c
> +++ b/crypto/hash-nettle.c
> @@ -26,12 +26,18 @@
>  #include <nettle/sha.h>
>  #include <nettle/ripemd160.h>
>
> +#if CONFIG_NETTLE_VERSION_MAJOR < 3
> +typedef unsigned int     hash_length_t;
> +#else
> +typedef size_t       hash_length_t;
> +#endif
> +
>  typedef void (*qcrypto_nettle_init)(void *ctx);
>  typedef void (*qcrypto_nettle_write)(void *ctx,
> -                                     unsigned int len,
> +                                     hash_length_t len,
>                                       const uint8_t *buf);
>  typedef void (*qcrypto_nettle_result)(void *ctx,
> -                                      unsigned int len,
> +                                      hash_length_t len,
>                                        uint8_t *buf);
>
>  union qcrypto_hash_ctx {
> @@ -112,7 +118,7 @@ qcrypto_nettle_hash_bytesv(QCryptoHashAlgorithm alg,
>                             size_t *resultlen,
>                             Error **errp)
>  {
> -    int i;
> +    size_t i;
>      union qcrypto_hash_ctx ctx;
>
>      if (!qcrypto_hash_supports(alg)) {
> diff --git a/crypto/hmac-nettle.c b/crypto/hmac-nettle.c
> index ec2d61bdde..1152b741fd 100644
> --- a/crypto/hmac-nettle.c
> +++ b/crypto/hmac-nettle.c
> @@ -18,14 +18,23 @@
>  #include "hmacpriv.h"
>  #include <nettle/hmac.h>
>
> +#if CONFIG_NETTLE_VERSION_MAJOR < 3
> +typedef unsigned int hmac_length_t;
> +#else
> +typedef size_t hmac_length_t;
> +#endif
> +
>  typedef void (*qcrypto_nettle_hmac_setkey)(void *ctx,
> -              size_t key_length, const uint8_t *key);
> +                                           hmac_length_t key_length,
> +                                           const uint8_t *key);
>
>  typedef void (*qcrypto_nettle_hmac_update)(void *ctx,
> -              size_t length, const uint8_t *data);
> +                                           hmac_length_t length,
> +                                           const uint8_t *data);
>
>  typedef void (*qcrypto_nettle_hmac_digest)(void *ctx,
> -              size_t length, uint8_t *digest);
> +                                           hmac_length_t length,
> +                                           uint8_t *digest);
>
>  typedef struct QCryptoHmacNettle QCryptoHmacNettle;
>  struct QCryptoHmacNettle {
> @@ -135,7 +144,7 @@ qcrypto_nettle_hmac_bytesv(QCryptoHmac *hmac,
>                             Error **errp)
>  {
>      QCryptoHmacNettle *ctx;
> -    int i;
> +    size_t i;
>
>      ctx = (QCryptoHmacNettle *)hmac->opaque;


--
Alex Bennée