calc_buffer_shash_tfm

Name:calc_buffer_shash_tfm

Proto:static int calc_buffer_shash_tfm(const void *buf, loff_t size, struct ima_digest_data *hash, struct crypto_shash *tfm)

Type:int

Parameter:

Type	Parameter	Name
const void *	buf
loff_t	size
struct ima_digest_data *	hash
struct crypto_shash *	tfm

592

SHASH_DESC_ON_STACK(shash, tfm)

596

tfm = tfm

598

length = rypto_shash_digestsize() - obtain message digest size*@tfm: cipher handle* The size for the message digest created by the message digest cipher* referenced with the cipher handle is returned.* Return: digest size of cipher

600

rc = rypto_shash_init() - (re)initialize message digest*@desc: operational state handle that is already filled* The call (re-)initializes the message digest referenced by the* operational state handle. Any potentially existing state created by

601

If rc != 0 Then Return rc

604

When size cycle

605

len = If size < PAGE_SIZE Then size Else PAGE_SIZE

606

rc = rypto_shash_update() - add data to message digest for processing*@desc: operational state handle that is already initialized*@data: input data to be added to the message digest*@len: length of the input data

607

If rc Then Break

609

buf += len

610

size -= len

613

If Not rc Then rc = rypto_shash_final() - calculate message digest*@desc: operational state handle that is already filled with data*@out: output buffer filled with the message digest* Finalize the message digest operation and create the message digest

615

Return rc

**Caller**
Name	Describe
calc_buffer_shash

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