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util_sha512h

Compute an sha512-half over some data

Behaviour

Compute an SHA512 hash over the data pointed to by read_ptr
Write the first half of the hash to write_ptr

Definition

int64_t util_sha512h (
    uint32_t write_ptr,
    uint32_t write_len,
    uint32_t read_ptr,
    uint32_t read_len
);

Example

uint8_t hash_out[32];
if (util_sha512h(hash_out, 32, data_in_ptr, data_in_len) < 0)
	rollback("Could not generate Hash", 23, 1);

Parameters

Name

Type

Description

write_ptr

uint32_t

Pointer to a buffer the hash will be written to

write_len

uint32_t

Length of output buffer, should be at least 32.

read_ptr

uint32_t

Pointer to the buffer data will be read from (to compute the hash over)

read_len

uint32_t

Length of input data

Return Code

Type

Description

int64_t

The number of bytes written, should always be 32. If negative, an error: OUT_OF_BOUNDS - pointers/lengths specified outside of hook memory. TOO_SMALL - Output buffer isn't large enough

util_sha512h

Compute an sha512-half over some data

Behaviour

Compute an SHA512 hash over the data pointed to by read_ptr
Write the first half of the hash to write_ptr

Definition

int64_t util_sha512h (
    uint32_t write_ptr,
    uint32_t write_len,
    uint32_t read_ptr,
    uint32_t read_len
);

Example

uint8_t hash_out[32];
if (util_sha512h(hash_out, 32, data_in_ptr, data_in_len) < 0)
	rollback("Could not generate Hash", 23, 1);

Parameters

Name

Type

Description

write_ptr

uint32_t

Pointer to a buffer the hash will be written to

write_len

uint32_t

Length of output buffer, should be at least 32.

read_ptr

uint32_t

Pointer to the buffer data will be read from (to compute the hash over)

read_len

uint32_t

Length of input data

Return Code

Type

Description

int64_t

The number of bytes written, should always be 32. If negative, an error: OUT_OF_BOUNDS - pointers/lengths specified outside of hook memory. TOO_SMALL - Output buffer isn't large enough