Security API

Digest

typedef union digest_ctx digest_ctx

struct digest_func

#include <digest.h>

Abstraction to use different cryptographic libraries to calculate the hash

ECC

ECC_VERIFY(impl)

ECC_SIGN(impl)

ECC_FUNC(impl, size)

SHA 256

SHA256_INIT(lib)

SHA256_UPDATE(lib)

SHA256_FINAL(lib)

DIGEST_FUNC(lib)

This struct defines a set of default digest function. You can define your own structure adding the function you need.

Verifier

safestore_t

pull_error verify_object(mem_object_t *obj, digest_func f, const uint8_t *x, const uint8_t *y, ecc_func_t ef, uint8_t *buffer, size_t buffer_len)

This function verifies the signature on the object id.

The digest function and the curve must match the one used to generate the signature stored into the memory object metadata. The ECC signature does not accept any format to reduce space used to store keys.

Note

The size of the buffer must be greather or equal to the chunk of manifest to be hashed

Return

PULL_SUCCESS if verification succeded or the specific error otherwise.

Parameters

• obj_t: The memory object to validate
• f: The digest function.
• x: The X parameter of the signer’s public key.
• y: The Y parameter of the signer’s public key.
• curve: The curve parameters.
• buffer: The buffer used to read data from the object
• buffer_len: The size of the buffer

union

Public Members

uint8_t struct::x[32]

uint8_t struct::y[32]