diff options
Diffstat (limited to 'Documentation/crypto')
| -rw-r--r-- | Documentation/crypto/api-samples.rst | 38 | ||||
| -rw-r--r-- | Documentation/crypto/userspace-if.rst | 2 |
2 files changed, 29 insertions, 11 deletions
diff --git a/Documentation/crypto/api-samples.rst b/Documentation/crypto/api-samples.rst index d021fd96a76d..2531948db89f 100644 --- a/Documentation/crypto/api-samples.rst +++ b/Documentation/crypto/api-samples.rst @@ -155,9 +155,9 @@ Code Example For Use of Operational State Memory With SHASH char ctx[]; }; - static struct sdesc init_sdesc(struct crypto_shash *alg) + static struct sdesc *init_sdesc(struct crypto_shash *alg) { - struct sdesc sdesc; + struct sdesc *sdesc; int size; size = sizeof(struct shash_desc) + crypto_shash_descsize(alg); @@ -169,15 +169,16 @@ Code Example For Use of Operational State Memory With SHASH return sdesc; } - static int calc_hash(struct crypto_shashalg, - const unsigned chardata, unsigned int datalen, - unsigned chardigest) { - struct sdesc sdesc; + static int calc_hash(struct crypto_shash *alg, + const unsigned char *data, unsigned int datalen, + unsigned char *digest) + { + struct sdesc *sdesc; int ret; sdesc = init_sdesc(alg); if (IS_ERR(sdesc)) { - pr_info("trusted_key: can't alloc %s\n", hash_alg); + pr_info("can't alloc sdesc\n"); return PTR_ERR(sdesc); } @@ -186,6 +187,23 @@ Code Example For Use of Operational State Memory With SHASH return ret; } + static int test_hash(const unsigned char *data, unsigned int datalen, + unsigned char *digest) + { + struct crypto_shash *alg; + char *hash_alg_name = "sha1-padlock-nano"; + int ret; + + alg = crypto_alloc_shash(hash_alg_name, CRYPTO_ALG_TYPE_SHASH, 0); + if (IS_ERR(alg)) { + pr_info("can't alloc alg %s\n", hash_alg_name); + return PTR_ERR(alg); + } + ret = calc_hash(alg, data, datalen, digest); + crypto_free_shash(alg); + return ret; + } + Code Example For Random Number Generator Usage ---------------------------------------------- @@ -195,8 +213,8 @@ Code Example For Random Number Generator Usage static int get_random_numbers(u8 *buf, unsigned int len) { - struct crypto_rngrng = NULL; - chardrbg = "drbg_nopr_sha256"; /* Hash DRBG with SHA-256, no PR */ + struct crypto_rng *rng = NULL; + char *drbg = "drbg_nopr_sha256"; /* Hash DRBG with SHA-256, no PR */ int ret; if (!buf || !len) { @@ -207,7 +225,7 @@ Code Example For Random Number Generator Usage rng = crypto_alloc_rng(drbg, 0, 0); if (IS_ERR(rng)) { pr_debug("could not allocate RNG handle for %s\n", drbg); - return -PTR_ERR(rng); + return PTR_ERR(rng); } ret = crypto_rng_get_bytes(rng, buf, len); diff --git a/Documentation/crypto/userspace-if.rst b/Documentation/crypto/userspace-if.rst index de5a72e32bc9..ff86befa61e0 100644 --- a/Documentation/crypto/userspace-if.rst +++ b/Documentation/crypto/userspace-if.rst @@ -327,7 +327,7 @@ boundary. Non-aligned data can be used as well, but may require more operations of the kernel which would defeat the speed gains obtained from the zero-copy interface. -The system-interent limit for the size of one zero-copy operation is 16 +The system-inherent limit for the size of one zero-copy operation is 16 pages. If more data is to be sent to AF_ALG, user space must slice the input into segments with a maximum size of 16 pages. |