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X509_SIGNATURE_DUMP(3) Library Functions Manual X509_SIGNATURE_DUMP(3)

X509_signature_dump, X509_signature_printpretty-print ASN.1 strings

#include <openssl/x509.h>

X509_signature_dump(BIO *bio, const ASN1_STRING *signature, int indent);

X509_signature_print(BIO *bio, const X509_ALGOR *algorithm, const ASN1_STRING *signature);

() writes the data bytes contained in the signature to bio in hexadecimal format with colons between bytes, 18 bytes per output line, each line indented with indent space characters.

() writes the name of the signature algorithm, or, if no name for it is known, its object identifier (OID) to bio using i2a_ASN1_OBJECT(3). After that, if a method object for the algorithm can be retrieved with EVP_PKEY_asn1_find(3) and if that object defines a printing method, that printing method is used to print the signature. Otherwise, unless the signature is NULL, it is printed using X509_signature_dump().

These functions return 1 on success or 0 on failure. They fail and return as soon as any write operation fails.

ASN1_STRING_new(3), ASN1_STRING_print_ex(3), BIO_new(3), EVP_PKEY_asn1_new(3), OBJ_find_sigid_algs(3), X509_ALGOR_new(3), X509_get0_signature(3)

X509_signature_print() first appeared in OpenSSL 0.9.7 and has been available since OpenBSD 3.2.

X509_signature_dump() first appeared in OpenSSL 1.0.1 and has been available since OpenBSD 5.3.

December 18, 2021 OpenBSD-7.1