.\" $OpenBSD: d2i_RSAPublicKey.3,v 1.10 2018/03/21 01:27:25 schwarze Exp $ .\" OpenSSL bb9ad09e Jun 6 00:43:05 2016 -0400 .\" .\" This file is a derived work. .\" The changes are covered by the following Copyright and license: .\" .\" Copyright (c) 2016 Ingo Schwarze .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. .\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS. 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IN NO EVENT SHALL THE OpenSSL PROJECT OR .\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, .\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; .\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, .\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED .\" OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd $Mdocdate: March 21 2018 $ .Dt D2I_RSAPUBLICKEY 3 .Os .Sh NAME .Nm d2i_RSAPublicKey , .Nm i2d_RSAPublicKey , .Nm d2i_RSAPrivateKey , .Nm i2d_RSAPrivateKey , .Nm d2i_Netscape_RSA , .Nm i2d_Netscape_RSA , .Nm d2i_RSA_PSS_PARAMS , .Nm i2d_RSA_PSS_PARAMS , .Nm d2i_RSAPublicKey_bio , .Nm d2i_RSAPublicKey_fp , .Nm i2d_RSAPublicKey_bio , .Nm i2d_RSAPublicKey_fp , .Nm d2i_RSAPrivateKey_bio , .Nm d2i_RSAPrivateKey_fp , .Nm i2d_RSAPrivateKey_bio , .Nm i2d_RSAPrivateKey_fp , .Nm d2i_RSA_PUBKEY , .Nm i2d_RSA_PUBKEY , .Nm d2i_RSA_PUBKEY_bio , .Nm d2i_RSA_PUBKEY_fp , .Nm i2d_RSA_PUBKEY_bio , .Nm i2d_RSA_PUBKEY_fp .Nd decode and encode RSA keys and parameters .Sh SYNOPSIS .In openssl/rsa.h .Ft RSA * .Fo d2i_RSAPublicKey .Fa "RSA **val_out" .Fa "const unsigned char **der_in" .Fa "long length" .Fc .Ft int .Fo i2d_RSAPublicKey .Fa "RSA *val_in" .Fa "unsigned char **der_out" .Fc .Ft RSA * .Fo d2i_RSAPrivateKey .Fa "RSA **val_out" .Fa "const unsigned char **der_in" .Fa "long length" .Fc .Ft int .Fo i2d_RSAPrivateKey .Fa "RSA *val_in" .Fa "unsigned char **der_out" .Fc .Ft RSA * .Fo d2i_Netscape_RSA .Fa "RSA **val_out" .Fa "const unsigned char **der_in" .Fa "long length" .Fa "int (*cb)()" .Fc .Ft int .Fo i2d_Netscape_RSA .Fa "RSA *val_in" .Fa "unsigned char **der_out" .Fa "int (*cb)()" .Fc .Ft RSA_PSS_PARAMS * .Fo d2i_RSA_PSS_PARAMS .Fa "RSA_PSS_PARAMS **val_out" .Fa "const unsigned char **der_in" .Fa "long length" .Fc .Ft int .Fo i2d_RSA_PSS_PARAMS .Fa "RSA_PSS_PARAMS *val_in" .Fa "unsigned char **der_out" .Fc .In openssl/x509.h .Ft RSA * .Fo d2i_RSAPublicKey_bio .Fa "BIO *in_bio" .Fa "RSA **val_out" .Fc .Ft RSA * .Fo d2i_RSAPublicKey_fp .Fa "FILE *in_fp" .Fa "RSA **val_out" .Fc .Ft int .Fo i2d_RSAPublicKey_bio .Fa "BIO *out_bio" .Fa "RSA *val_in" .Fc .Ft int .Fo i2d_RSAPublicKey_fp .Fa "FILE *out_fp" .Fa "RSA *val_in" .Fc .Ft RSA * .Fo d2i_RSAPrivateKey_bio .Fa "BIO *in_bio" .Fa "RSA **val_out" .Fc .Ft RSA * .Fo d2i_RSAPrivateKey_fp .Fa "FILE *in_fp" .Fa "RSA **val_out" .Fc .Ft int .Fo i2d_RSAPrivateKey_bio .Fa "BIO *out_bio" .Fa "RSA *val_in" .Fc .Ft int .Fo i2d_RSAPrivateKey_fp .Fa "FILE *out_fp" .Fa "RSA *val_in" .Fc .Ft RSA * .Fo d2i_RSA_PUBKEY .Fa "RSA **val_out" .Fa "const unsigned char **der_in" .Fa "long length" .Fc .Ft int .Fo i2d_RSA_PUBKEY .Fa "RSA *val_in" .Fa "unsigned char **der_out" .Fc .Ft RSA * .Fo d2i_RSA_PUBKEY_bio .Fa "BIO *in_bio" .Fa "RSA **val_out" .Fc .Ft RSA * .Fo d2i_RSA_PUBKEY_fp .Fa "FILE *in_fp" .Fa "RSA **val_out" .Fc .Ft int .Fo i2d_RSA_PUBKEY_bio .Fa "BIO *out_bio" .Fa "RSA *val_in" .Fc .Ft int .Fo i2d_RSA_PUBKEY_fp .Fa "FILE *out_fp" .Fa "RSA *val_in" .Fc .Sh DESCRIPTION These functions decode and encode RSA private and public keys. For details about the semantics, examples, caveats, and bugs, see .Xr ASN1_item_d2i 3 . .Pp .Fn d2i_RSAPublicKey and .Fn i2d_RSAPublicKey decode and encode a PKCS#1 .Vt RSAPublicKey structure defined in RFC 8017 appendix A.1.1. .Fn d2i_RSAPublicKey_bio , .Fn d2i_RSAPublicKey_fp , .Fn i2d_RSAPublicKey_bio , and .Fn i2d_RSAPublicKey_fp are similar except that they decode or encode using a .Vt BIO or .Vt FILE pointer. .Pp .Fn d2i_RSAPrivateKey and .Fn i2d_RSAPrivateKey decode and encode a PKCS#1 .Vt RSAPrivateKey structure defined in RFC 8017 appendix A.1.2. The .Vt RSA structure passed to the private key encoding functions should have all the PKCS#1 private key components present. The data encoded by the private key functions is unencrypted and therefore offers no private key security. .Fn d2i_RSAPrivateKey_bio , .Fn d2i_RSAPrivateKey_fp , .Fn i2d_RSAPrivateKey_bio , and .Fn i2d_RSAPrivateKey_fp are similar except that they decode or encode using a .Vt BIO or .Vt FILE pointer. .Pp .Fn d2i_Netscape_RSA and .Fn i2d_Netscape_RSA decode and encode an RSA private key in NET format. These functions are present to provide compatibility with certain very old software. The NET format has some severe security weaknesses and should be avoided if possible. .Pp .Fn d2i_RSA_PSS_PARAMS and .Fn i2d_RSA_PSS_PARAMS decode and encode a PKCS#1 .Vt RSASSA-PSS-params structure defined in RFC 8017 appendix A.2.3 and documented in .Xr RSA_PSS_PARAMS_new 3 . .Pp .Fn d2i_RSA_PUBKEY and .Fn i2d_RSA_PUBKEY decode and encode an RSA public key using an ASN.1 .Vt SubjectPublicKeyInfo structure defined in RFC 5280 section 4.1 and documented in .Xr X509_PUBKEY_new 3 . .Fn d2i_RSA_PUBKEY_bio , .Fn d2i_RSA_PUBKEY_fp , .Fn i2d_RSA_PUBKEY_bio , and .Fn i2d_RSA_PUBKEY_fp are similar except that they decode or encode using a .Vt BIO or .Vt FILE pointer. .Sh RETURN VALUES .Fn d2i_RSAPublicKey , .Fn d2i_RSAPublicKey_bio , .Fn d2i_RSAPublicKey_fp , .Fn d2i_RSAPrivateKey , .Fn d2i_RSAPrivateKey_bio , .Fn d2i_RSAPrivateKey_fp , .Fn d2i_Netscape_RSA , .Fn d2i_RSA_PUBKEY , .Fn d2i_RSA_PUBKEY_bio , and .Fn d2i_RSA_PUBKEY_fp return a valid .Vt RSA object or .Dv NULL if an error occurs. .Pp .Fn d2i_RSA_PSS_PARAMS returns a valid .Vt RSA_PSS_PARAMS object or .Dv NULL if an error occurs. .Pp .Fn i2d_RSAPublicKey , .Fn i2d_RSAPrivateKey , .Fn i2d_Netscape_RSA , .Fn i2d_RSA_PSS_PARAMS , and .Fn i2d_RSA_PUBKEY return the number of bytes successfully encoded or a negative value if an error occurs. .Pp .Fn i2d_RSAPublicKey_bio , .Fn i2d_RSAPublicKey_fp , .Fn i2d_RSAPrivateKey_bio , .Fn i2d_RSAPrivateKey_fp , .Fn i2d_RSA_PUBKEY_bio , and .Fn i2d_RSA_PUBKEY_fp return 1 for success or 0 if an error occurs. .Sh SEE ALSO .Xr ASN1_item_d2i 3 , .Xr EVP_PKEY_set1_RSA 3 , .Xr PEM_write_RSAPrivateKey 3 , .Xr RSA_new 3 , .Xr RSA_PSS_PARAMS_new 3 , .Xr X509_PUBKEY_new 3 .Sh STANDARDS RFC 8017: PKCS #1: RSA Cryptography Specifications .Pp RFC 5280: Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile, section 4.1: Basic Certificate Fields .Sh HISTORY .Fn d2i_RSAPublicKey , .Fn i2d_RSAPublicKey , .Fn d2i_RSAPrivateKey , .Fn i2d_RSAPrivateKey , .Fn d2i_Netscape_RSA , .Fn i2d_Netscape_RSA , .Fn d2i_RSAPublicKey_bio , .Fn d2i_RSAPublicKey_fp , .Fn i2d_RSAPublicKey_bio , .Fn i2d_RSAPublicKey_fp , .Fn d2i_RSAPrivateKey_bio , .Fn d2i_RSAPrivateKey_fp , .Fn i2d_RSAPrivateKey_bio , and .Fn i2d_RSAPrivateKey_fp appeared before SSLeay 0.8 and have been available since .Ox 2.4 .