1.\" $OpenBSD: X509_signature_dump.3,v 1.1 2021/07/06 16:05:44 schwarze Exp $ 2.\" 3.\" Copyright (c) 2021 Ingo Schwarze <schwarze@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: July 6 2021 $ 18.Dt X509_SIGNATURE_DUMP 3 19.Os 20.Sh NAME 21.Nm X509_signature_dump , 22.Nm X509_signature_print 23.Nd pretty-print ASN.1 strings 24.Sh SYNOPSIS 25.In openssl/x509.h 26.Ft int 27.Fo X509_signature_dump 28.Fa "BIO *bio" 29.Fa "const ASN1_STRING *signature" 30.Fa "int indent" 31.Fc 32.Ft int 33.Fo X509_signature_print 34.Fa "BIO *bio" 35.Fa "const X509_ALGOR *algorithm" 36.Fa "const ASN1_STRING *signature" 37.Fc 38.Sh DESCRIPTION 39.Fn X509_signature_dump 40writes the data bytes contained in the 41.Fa signature 42to 43.Fa bio 44in hexadecimal format with colons between bytes, 4518 bytes per output line, each line indented with 46.Fa indent 47space characters. 48.Pp 49.Fn X509_signature_print 50writes the name of the signature 51.Fa algorithm , 52or, if no name for it is known, its object identifier (OID) to 53.Fa bio 54using 55.Xr i2a_ASN1_OBJECT 3 . 56After that, if a method object for the algorithm can be retrieved with 57.Xr EVP_PKEY_asn1_find 3 58and if that object defines a printing method, that printing method is 59used to print the 60.Fa signature . 61Otherwise, unless the 62.Fa signature 63is 64.Dv NULL , 65it is printed using 66.Fn X509_signature_dump . 67.Sh RETURN VALUES 68These functions return 1 on success or 0 on failure. 69They fail and return as soon as any write operation fails. 70.Sh SEE ALSO 71.Xr ASN1_STRING_new 3 , 72.Xr ASN1_STRING_print_ex 3 , 73.Xr BIO_new 3 , 74.Xr EVP_PKEY_asn1_new 3 , 75.Xr X509_ALGOR_new 3 , 76.Xr X509_get0_signature 3 77.Sh HISTORY 78.Fn X509_signature_print 79first appeared in OpenSSL 0.9.7 and has been available since 80.Ox 3.2 . 81.Pp 82.Fn X509_signature_dump 83first appeared in OpenSSL 1.0.1 and has been available since 84.Ox 5.3 . 85