ica_sha224

Purpose

Performs a secure hash operation on the input data using the SHA-224 algorithm.

Format

unsigned int ica_sha224(unsigned int message_part,
  unsigned int input_length,
  const unsigned char *input_data,
  sha256_context_t *sha256_context,
  unsigned char *output_data);

Required hardware support

KIMD-SHA-256 and KLMD-SHA-256

Parameters

unsigned int message_part

The message chaining state. This parameter must be one of the following values:

SHA_MSG_PART_ONLY

A single hash operation

SHA_MSG_PART_FIRST

The first part

SHA_MSG_PART_MIDDLE

The middle part

SHA_MSG_PART_FINAL

The last part

unsigned int input_length

Length in bytes of the input data to be hashed using the SHA-224 algorithm. For SHA_MSG_PART_FIRST and SHA_MSG_PART_MIDDLE calls, the byte length must be a multiple of 64, that is, the SHA-224 block size.

const unsigned char *input_data

Pointer to the input data to be hashed. This pointer must not be zero. So even in case of zero size message data, it must be set to a valid value.

sha256_context_t *sha256_context

Pointer to the SHA-256 context structure used to store intermediate values needed when chaining is used. The contents are ignored for message part SHA_MSG_PART_ONLY and SHA_MSG_PART_FIRST. This structure must contain the returned value of the preceding call to ica_sha224 for message part SHA_MSG_PART_MIDDLE and SHA_MSG_PART_FINAL. For message part SHA_MSG_PART_FIRST and SHA_MSG_PART_FINAL, the returned value can be used for a chained call of ica_sha224. Therefore, the application must not modify the contents of this structure in between chained calls.

Note: Due to the algorithm used by SHA-224, a SHA-256 context must be used.

unsigned char *output_data

Pointer to the buffer to contain the resulting hash data. The resulting output data has a length of SHA224_HASH_LENGTH. Make sure that the buffer is at least this size.

Return codes

0

Success

For return codes indicating exceptions, see Return codes.