X509_SIGNATURE_DUMP(3)     Library Functions Manual     X509_SIGNATURE_DUMP(3)

NAME
     X509_signature_dump, X509_signature_print - pretty-print ASN.1 strings

SYNOPSIS
     #include <openssl/x509.h>

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

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

DESCRIPTION
     X509_signature_dump() 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.

     X509_signature_print() 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().

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

SEE ALSO
     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)

HISTORY
     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.

Linux 6.8.7-arch1-1            December 18, 2021           Linux 6.8.7-arch1-1