sha.h
Functions
Name | |
---|---|
int | wc_InitSha(wc_Sha * ) This function initializes SHA. This is automatically called by wc_ShaHash. |
int | wc_ShaUpdate(wc_Sha * sha, const byte * data, word32 len) Can be called to continually hash the provided byte array of length len. |
int | wc_ShaFinal(wc_Sha * sha, byte * hash) Finalizes hashing of data. Result is placed into hash. Resets state of sha struct. |
void | wc_ShaFree(wc_Sha * ) Used to clean up memory used by an initialized Sha struct. Note: this is only supported if you have WOLFSSL_TI_HASH defined. |
int | wc_ShaGetHash(wc_Sha * sha, byte * hash) Gets hash data. Result is placed into hash. Does not reset state of sha struct. |
Functions Documentation
function wc_InitSha
int wc_InitSha(
wc_Sha *
)
This function initializes SHA. This is automatically called by wc_ShaHash.
Parameters:
- sha pointer to the sha structure to use for encryption
See:
Return: 0 Returned upon successfully initializing
Example
Sha sha[1];
if ((ret = wc_InitSha(sha)) != 0) {
WOLFSSL_MSG("wc_InitSha failed");
}
else {
wc_ShaUpdate(sha, data, len);
wc_ShaFinal(sha, hash);
}
function wc_ShaUpdate
int wc_ShaUpdate(
wc_Sha * sha,
const byte * data,
word32 len
)
Can be called to continually hash the provided byte array of length len.
Parameters:
- sha pointer to the sha structure to use for encryption
- data the data to be hashed
- len length of data to be hashed
See:
Return: 0 Returned upon successfully adding the data to the digest.
Example
Sha sha[1];
byte data[] = { // Data to be hashed };
word32 len = sizeof(data);
if ((ret = wc_InitSha(sha)) != 0) {
WOLFSSL_MSG("wc_InitSha failed");
}
else {
wc_ShaUpdate(sha, data, len);
wc_ShaFinal(sha, hash);
}
function wc_ShaFinal
int wc_ShaFinal(
wc_Sha * sha,
byte * hash
)
Finalizes hashing of data. Result is placed into hash. Resets state of sha struct.
Parameters:
- sha pointer to the sha structure to use for encryption
- hash Byte array to hold hash value.
See:
Return: 0 Returned upon successfully finalizing.
Example
Sha sha[1];
byte data[] = { Data to be hashed };
word32 len = sizeof(data);
if ((ret = wc_InitSha(sha)) != 0) {
WOLFSSL_MSG("wc_InitSha failed");
}
else {
wc_ShaUpdate(sha, data, len);
wc_ShaFinal(sha, hash);
}
function wc_ShaFree
void wc_ShaFree(
wc_Sha *
)
Used to clean up memory used by an initialized Sha struct. Note: this is only supported if you have WOLFSSL_TI_HASH defined.
Parameters:
- sha Pointer to the Sha struct to free.
See:
Return: No returns.
Example
Sha sha;
wc_InitSha(&sha);
// Use sha
wc_ShaFree(&sha);
function wc_ShaGetHash
int wc_ShaGetHash(
wc_Sha * sha,
byte * hash
)
Gets hash data. Result is placed into hash. Does not reset state of sha struct.
Parameters:
- sha pointer to the sha structure to use for encryption
- hash Byte array to hold hash value.
See:
Return: 0 Returned upon successfully finalizing.
Example
Sha sha[1];
if ((ret = wc_InitSha(sha)) != 0) {
WOLFSSL_MSG("wc_InitSha failed");
}
else {
wc_ShaUpdate(sha, data, len);
wc_ShaGetHash(sha, hash);
}
Source code
int wc_InitSha(wc_Sha*);
int wc_ShaUpdate(wc_Sha* sha, const byte* data, word32 len);
int wc_ShaFinal(wc_Sha* sha, byte* hash);
void wc_ShaFree(wc_Sha*);
int wc_ShaGetHash(wc_Sha* sha, byte* hash);
Updated on 2024-11-21 at 01:17:07 +0000