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+.\" Automatically generated by Pod::Man version 1.15
+.\" Thu May 9 13:19:41 2002
+.\"
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+.\" ======================================================================
+.\"
+.IX Title "RSA 1"
+.TH RSA 1 "perl v5.6.1" "2000-11-13" "User Contributed Perl Documentation"
+.UC
+.SH "NAME"
+rsa \- \s-1RSA\s0 public key cryptosystem
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/rsa.h>
+.Ve
+.Vb 2
+\& RSA * RSA_new(void);
+\& void RSA_free(RSA *rsa);
+.Ve
+.Vb 4
+\& int RSA_public_encrypt(int flen, unsigned char *from,
+\& unsigned char *to, RSA *rsa, int padding);
+\& int RSA_private_decrypt(int flen, unsigned char *from,
+\& unsigned char *to, RSA *rsa, int padding);
+.Ve
+.Vb 4
+\& int RSA_sign(int type, unsigned char *m, unsigned int m_len,
+\& unsigned char *sigret, unsigned int *siglen, RSA *rsa);
+\& int RSA_verify(int type, unsigned char *m, unsigned int m_len,
+\& unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
+.Ve
+.Vb 1
+\& int RSA_size(RSA *rsa);
+.Ve
+.Vb 2
+\& RSA *RSA_generate_key(int num, unsigned long e,
+\& void (*callback)(int,int,void *), void *cb_arg);
+.Ve
+.Vb 1
+\& int RSA_check_key(RSA *rsa);
+.Ve
+.Vb 2
+\& int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
+\& void RSA_blinding_off(RSA *rsa);
+.Ve
+.Vb 9
+\& void RSA_set_default_method(RSA_METHOD *meth);
+\& RSA_METHOD *RSA_get_default_method(void);
+\& RSA_METHOD *RSA_set_method(RSA *rsa, RSA_METHOD *meth);
+\& RSA_METHOD *RSA_get_method(RSA *rsa);
+\& RSA_METHOD *RSA_PKCS1_SSLeay(void);
+\& RSA_METHOD *RSA_PKCS1_RSAref(void);
+\& RSA_METHOD *RSA_null_method(void);
+\& int RSA_flags(RSA *rsa);
+\& RSA *RSA_new_method(RSA_METHOD *method);
+.Ve
+.Vb 2
+\& int RSA_print(BIO *bp, RSA *x, int offset);
+\& int RSA_print_fp(FILE *fp, RSA *x, int offset);
+.Ve
+.Vb 4
+\& int RSA_get_ex_new_index(long argl, char *argp, int (*new_func)(),
+\& int (*dup_func)(), void (*free_func)());
+\& int RSA_set_ex_data(RSA *r,int idx,char *arg);
+\& char *RSA_get_ex_data(RSA *r, int idx);
+.Ve
+.Vb 4
+\& 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
+.Vb 6
+\& int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
+\& unsigned int m_len, unsigned char *sigret, unsigned int *siglen,
+\& RSA *rsa);
+\& int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
+\& unsigned int m_len, unsigned char *sigbuf, unsigned int siglen,
+\& RSA *rsa);
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+These functions implement \s-1RSA\s0 public key encryption and signatures
+as defined in \s-1PKCS\s0 #1 v2.0 [\s-1RFC\s0 2437].
+.PP
+The \fB\s-1RSA\s0\fR structure consists of several \s-1BIGNUM\s0 components. It can
+contain public as well as private \s-1RSA\s0 keys:
+.PP
+.Vb 13
+\& struct
+\& {
+\& BIGNUM *n; // public modulus
+\& BIGNUM *e; // public exponent
+\& BIGNUM *d; // private exponent
+\& BIGNUM *p; // secret prime factor
+\& BIGNUM *q; // secret prime factor
+\& BIGNUM *dmp1; // d mod (p-1)
+\& BIGNUM *dmq1; // d mod (q-1)
+\& BIGNUM *iqmp; // q^-1 mod p
+\& // ...
+\& };
+\& RSA
+.Ve
+In public keys, the private exponent and the related secret values are
+\&\fB\s-1NULL\s0\fR.
+.PP
+\&\fBp\fR, \fBq\fR, \fBdmp1\fR, \fBdmq1\fR and \fBiqmp\fR may be \fB\s-1NULL\s0\fR in private
+keys, but the \s-1RSA\s0 operations are much faster when these values are
+available.
+.SH "CONFORMING TO"
+.IX Header "CONFORMING TO"
+\&\s-1SSL\s0, \s-1PKCS\s0 #1 v2.0
+.SH "PATENTS"
+.IX Header "PATENTS"
+\&\s-1RSA\s0 was covered by a \s-1US\s0 patent which expired in September 2000.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+rsa(1), bn(3), dsa(3), dh(3),
+rand(3), RSA_new(3),
+RSA_public_encrypt(3),
+RSA_sign(3), RSA_size(3),
+RSA_generate_key(3),
+RSA_check_key(3),
+RSA_blinding_on(3),
+RSA_set_method(3), RSA_print(3),
+RSA_get_ex_new_index(3),
+RSA_private_encrypt(3),
+RSA_sign_ASN_OCTET_STRING(3),
+RSA_padding_add_PKCS1_type_1(3)
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