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RSA_padding_check_PKCS1_OAEP.3
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.\" Automatically generated by Pod::Man v1.37, Pod::Parser v1.32 .\" .\" Standard preamble: .\" ======================================================================== .de Sh \" Subsection heading .br .if t .Sp .ne 5 .PP \fB\\$1\fR .PP .. .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. | will give a .\" real vertical bar. \*(C+ will give a nicer C++. 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Normally they should not be called from application programs. .PP However, they can also be called directly to implement padding for other asymmetric ciphers. \fIRSA_padding_add_PKCS1_OAEP()\fR and \&\fIRSA_padding_check_PKCS1_OAEP()\fR may be used in an application combined with \fB\s-1RSA_NO_PADDING\s0\fR in order to implement \s-1OAEP\s0 with an encoding parameter. .PP \&\fIRSA_padding_add_xxx()\fR encodes \fBfl\fR bytes from \fBf\fR so as to fit into \&\fBtlen\fR bytes and stores the result at \fBto\fR. An error occurs if \fBfl\fR does not meet the size requirements of the encoding method. .PP The following encoding methods are implemented: .IP "PKCS1_type_1" 4 .IX Item "PKCS1_type_1" \&\s-1PKCS\s0 #1 v2.0 EMSA\-PKCS1\-v1_5 (\s-1PKCS\s0 #1 v1.5 block type 1); used for signatures .IP "PKCS1_type_2" 4 .IX Item "PKCS1_type_2" \&\s-1PKCS\s0 #1 v2.0 EME\-PKCS1\-v1_5 (\s-1PKCS\s0 #1 v1.5 block type 2) .IP "\s-1PKCS1_OAEP\s0" 4 .IX Item "PKCS1_OAEP" \&\s-1PKCS\s0 #1 v2.0 EME-OAEP .IP "SSLv23" 4 .IX Item "SSLv23" \&\s-1PKCS\s0 #1 EME\-PKCS1\-v1_5 with SSL-specific modification .IP "none" 4 .IX Item "none" simply copy the data .PP The random number generator must be seeded prior to calling \&\fIRSA_padding_add_xxx()\fR. .PP \&\fIRSA_padding_check_xxx()\fR verifies that the \fBfl\fR bytes at \fBf\fR contain a valid encoding for a \fBrsa_len\fR byte \s-1RSA\s0 key in the respective encoding method and stores the recovered data of at most \fBtlen\fR bytes (for \fB\s-1RSA_NO_PADDING\s0\fR: of size \fBtlen\fR) at \fBto\fR. .PP For \fIRSA_padding_xxx_OAEP()\fR, \fBp\fR points to the encoding parameter of length \fBpl\fR. \fBp\fR may be \fB\s-1NULL\s0\fR if \fBpl\fR is 0. .SH "RETURN VALUES" .IX Header "RETURN VALUES" The \fIRSA_padding_add_xxx()\fR functions return 1 on success, 0 on error. The \fIRSA_padding_check_xxx()\fR functions return the length of the recovered data, \-1 on error. Error codes can be obtained by calling \&\fIERR_get_error\fR\|(3). .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fIRSA_public_encrypt\fR\|(3), \&\fIRSA_private_decrypt\fR\|(3), \&\fIRSA_sign\fR\|(3), \fIRSA_verify\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fIRSA_padding_add_PKCS1_type_1()\fR, \fIRSA_padding_check_PKCS1_type_1()\fR, \&\fIRSA_padding_add_PKCS1_type_2()\fR, \fIRSA_padding_check_PKCS1_type_2()\fR, \&\fIRSA_padding_add_SSLv23()\fR, \fIRSA_padding_check_SSLv23()\fR, \&\fIRSA_padding_add_none()\fR and \fIRSA_padding_check_none()\fR appeared in SSLeay 0.9.0. .PP \&\fIRSA_padding_add_PKCS1_OAEP()\fR and \fIRSA_padding_check_PKCS1_OAEP()\fR were added in OpenSSL 0.9.2b.