ASN1_ITEM_DIGEST(3) | Library Functions Manual | ASN1_ITEM_DIGEST(3) |
NAME
ASN1_item_digest
—
DER-encode and hash an ASN.1 value
SYNOPSIS
#include
<openssl/x509.h>
int
ASN1_item_digest
(const ASN1_ITEM
*it, const EVP_MD *type, void
*val_in, unsigned char *md,
unsigned int *s);
DESCRIPTION
ASN1_item_digest
()
assumes that val_in is an
ASN1_VALUE of the type specified by
it, encodes it into DER format by calling
ASN1_item_i2d(3), hashes
the resulting byte array using the digest type by
calling EVP_Digest(3), places
the digest value into *md, and, unless
s is NULL
, places the length
in bytes of the digest into *s. Providing a buffer
*md large enough to contain the digest is the
responsibility of the caller; providing a buffer of
EVP_MAX_MD_SIZE
bytes is recommended.
RETURN VALUES
ASN1_item_digest
() returns 1 for success
or 0 if encoding or hashing fails.
SEE ALSO
HISTORY
ASN1_item_digest
() first appeared in
OpenSSL 0.9.7 and has been available since OpenBSD
3.1.
September 11, 2022 | Linux 6.8.2-arch2-1 |