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Diffstat (limited to 'secure/lib/libcrypto/man/RSA_private_encrypt.3')
| -rw-r--r-- | secure/lib/libcrypto/man/RSA_private_encrypt.3 | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/RSA_private_encrypt.3 b/secure/lib/libcrypto/man/RSA_private_encrypt.3 new file mode 100644 index 0000000..b657f51 --- /dev/null +++ b/secure/lib/libcrypto/man/RSA_private_encrypt.3 @@ -0,0 +1,187 @@ +.\" Automatically generated by Pod::Man 2.22 (Pod::Simple 3.07) +.\" +.\" Standard preamble: +.\" ======================================================================== +.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. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +RSA_private_encrypt, RSA_public_decrypt \- low level signature operations +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/rsa.h> +\& +\& int RSA_private_encrypt(int flen, unsigned char *from, +\& unsigned char *to, RSA *rsa, int padding); +\& +\& int RSA_public_decrypt(int flen, unsigned char *from, +\& unsigned char *to, RSA *rsa, int padding); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +These functions handle \s-1RSA\s0 signatures at a low level. +.PP +\&\fIRSA_private_encrypt()\fR signs the \fBflen\fR bytes at \fBfrom\fR (usually a +message digest with an algorithm identifier) using the private key +\&\fBrsa\fR and stores the signature in \fBto\fR. \fBto\fR must point to +\&\fBRSA_size(rsa)\fR bytes of memory. +.PP +\&\fBpadding\fR denotes one of the following modes: +.IP "\s-1RSA_PKCS1_PADDING\s0" 4 +.IX Item "RSA_PKCS1_PADDING" +\&\s-1PKCS\s0 #1 v1.5 padding. This function does not handle the +\&\fBalgorithmIdentifier\fR specified in \s-1PKCS\s0 #1. When generating or +verifying \s-1PKCS\s0 #1 signatures, \fIRSA_sign\fR\|(3) and \fIRSA_verify\fR\|(3) should be +used. +.IP "\s-1RSA_NO_PADDING\s0" 4 +.IX Item "RSA_NO_PADDING" +Raw \s-1RSA\s0 signature. This mode should \fIonly\fR be used to implement +cryptographically sound padding modes in the application code. +Signing user data directly with \s-1RSA\s0 is insecure. +.PP +\&\fIRSA_public_decrypt()\fR recovers the message digest from the \fBflen\fR +bytes long signature at \fBfrom\fR using the signer's public key +\&\fBrsa\fR. \fBto\fR must point to a memory section large enough to hold the +message digest (which is smaller than \fBRSA_size(rsa) \- +11\fR). \fBpadding\fR is the padding mode that was used to sign the data. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIRSA_private_encrypt()\fR returns the size of the signature (i.e., +RSA_size(rsa)). \fIRSA_public_decrypt()\fR returns the size of the +recovered message digest. +.PP +On error, \-1 is returned; the error codes can be +obtained by \fIERR_get_error\fR\|(3). +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIERR_get_error\fR\|(3), \fIrsa\fR\|(3), +\&\fIRSA_sign\fR\|(3), \fIRSA_verify\fR\|(3) +.SH "HISTORY" +.IX Header "HISTORY" +The \fBpadding\fR argument was added in SSLeay 0.8. \s-1RSA_NO_PADDING\s0 is +available since SSLeay 0.9.0. |
