Signed-off-by: Nicolas Morey-Chaisemartin <[email protected]>
---
include/odp/api/crypto.h | 2 +
.../linux-generic/include/odp_crypto_internal.h | 4 +
platform/linux-generic/odp_crypto.c | 89 ++++++++++++++++++++++
3 files changed, 95 insertions(+)
diff --git a/include/odp/api/crypto.h b/include/odp/api/crypto.h
index cc204a1..579354d 100644
--- a/include/odp/api/crypto.h
+++ b/include/odp/api/crypto.h
@@ -78,6 +78,8 @@ typedef enum {
ODP_AUTH_ALG_NULL,
/** HMAC-MD5 with 96 bit key */
ODP_AUTH_ALG_MD5_96,
+ /** SHA256 with 128 bit key */
+ ODP_AUTH_ALG_SHA256_128,
} odp_auth_alg_t;
/**
diff --git a/platform/linux-generic/include/odp_crypto_internal.h
b/platform/linux-generic/include/odp_crypto_internal.h
index 23fec04..10bcfd4 100644
--- a/platform/linux-generic/include/odp_crypto_internal.h
+++ b/platform/linux-generic/include/odp_crypto_internal.h
@@ -56,6 +56,10 @@ struct odp_crypto_generic_session {
uint8_t key[16];
uint32_t bytes;
} md5;
+ struct {
+ uint8_t key[32];
+ uint32_t bytes;
+ } sha256;
} data;
crypto_func_t func;
} auth;
diff --git a/platform/linux-generic/odp_crypto.c
b/platform/linux-generic/odp_crypto.c
index e3bc557..ed3d14c 100644
--- a/platform/linux-generic/odp_crypto.c
+++ b/platform/linux-generic/odp_crypto.c
@@ -140,6 +140,72 @@ odp_crypto_alg_err_t md5_check(odp_crypto_op_params_t
*params,
}
static
+odp_crypto_alg_err_t sha256_gen(odp_crypto_op_params_t *params,
+ odp_crypto_generic_session_t *session)
+{
+ uint8_t *data = odp_packet_data(params->out_pkt);
+ uint8_t *icv = data;
+ uint32_t len = params->auth_range.length;
+ uint8_t hash[EVP_MAX_MD_SIZE];
+
+ /* Adjust pointer for beginning of area to auth */
+ data += params->auth_range.offset;
+ icv += params->hash_result_offset;
+
+ /* Hash it */
+ HMAC(EVP_sha256(),
+ session->auth.data.sha256.key,
+ 32,
+ data,
+ len,
+ hash,
+ NULL);
+
+ /* Copy to the output location */
+ memcpy(icv, hash, session->auth.data.sha256.bytes);
+
+ return ODP_CRYPTO_ALG_ERR_NONE;
+}
+
+static
+odp_crypto_alg_err_t sha256_check(odp_crypto_op_params_t *params,
+ odp_crypto_generic_session_t *session)
+{
+ uint8_t *data = odp_packet_data(params->out_pkt);
+ uint8_t *icv = data;
+ uint32_t len = params->auth_range.length;
+ uint32_t bytes = session->auth.data.sha256.bytes;
+ uint8_t hash_in[EVP_MAX_MD_SIZE];
+ uint8_t hash_out[EVP_MAX_MD_SIZE];
+
+ /* Adjust pointer for beginning of area to auth */
+ data += params->auth_range.offset;
+ icv += params->hash_result_offset;
+
+ /* Copy current value out and clear it before authentication */
+ memset(hash_in, 0, sizeof(hash_in));
+ memcpy(hash_in, icv, bytes);
+ memset(icv, 0, bytes);
+ memset(hash_out, 0, sizeof(hash_out));
+
+ /* Hash it */
+ HMAC(EVP_sha256(),
+ session->auth.data.sha256.key,
+ 32,
+ data,
+ len,
+ hash_out,
+ NULL);
+
+ /* Verify match */
+ if (0 != memcmp(hash_in, hash_out, bytes))
+ return ODP_CRYPTO_ALG_ERR_ICV_CHECK;
+
+ /* Matched */
+ return ODP_CRYPTO_ALG_ERR_NONE;
+}
+
+static
odp_crypto_alg_err_t des_encrypt(odp_crypto_op_params_t *params,
odp_crypto_generic_session_t *session)
{
@@ -261,6 +327,26 @@ int process_md5_params(odp_crypto_generic_session_t
*session,
return 0;
}
+static
+int process_sha256_params(odp_crypto_generic_session_t *session,
+ odp_crypto_session_params_t *params,
+ uint32_t bits)
+{
+ /* Set function */
+ if (ODP_CRYPTO_OP_ENCODE == params->op)
+ session->auth.func = sha256_gen;
+ else
+ session->auth.func = sha256_check;
+
+ /* Number of valid bytes */
+ session->auth.data.sha256.bytes = bits / 8;
+
+ /* Convert keys */
+ memcpy(session->auth.data.sha256.key, params->auth_key.data, 32);
+
+ return 0;
+}
+
int
odp_crypto_session_create(odp_crypto_session_params_t *params,
odp_crypto_session_t *session_out,
@@ -323,6 +409,9 @@ odp_crypto_session_create(odp_crypto_session_params_t
*params,
case ODP_AUTH_ALG_MD5_96:
rc = process_md5_params(session, params, 96);
break;
+ case ODP_AUTH_ALG_SHA256_128:
+ rc = process_sha256_params(session, params, 128);
+ break;
default:
rc = -1;
}
--
2.6.2.406.gaaaec35
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