RSA_padding_add_PKCS1_type_1(OpenSRSA_padding_add_PKCS1_type_1(3)NAME
RSA_padding_add_PKCS1_type_1,
RSA_padding_check_PKCS1_type_1,
RSA_padding_add_PKCS1_type_2,
RSA_padding_check_PKCS1_type_2,
RSA_padding_add_PKCS1_OAEP, RSA_padding_check_PKCS1_OAEP,
RSA_padding_add_SSLv23, RSA_padding_check_SSLv23,
RSA_padding_add_none, RSA_padding_check_none - asymmetric
encryption padding
SYNOPSIS
#include <openssl/rsa.h>
int RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,
unsigned char *f, int fl);
int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
unsigned char *f, int fl, int rsa_len);
int RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,
unsigned char *f, int fl);
int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
unsigned char *f, int fl, int rsa_len);
int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen,
unsigned char *f, int fl, unsigned char *p, int pl);
int RSA_padding_check_PKCS1_OAEP(unsigned char *to, int tlen,
unsigned char *f, int fl, int rsa_len, unsigned char *p, int pl);
int RSA_padding_add_SSLv23(unsigned char *to, int tlen,
unsigned char *f, int fl);
int RSA_padding_check_SSLv23(unsigned char *to, int tlen,
unsigned char *f, int fl, int rsa_len);
int RSA_padding_add_none(unsigned char *to, int tlen,
unsigned char *f, int fl);
int RSA_padding_check_none(unsigned char *to, int tlen,
unsigned char *f, int fl, int rsa_len);
DESCRIPTION
The RSA_padding_xxx_xxx() functions are called from the
RSA encrypt, decrypt, sign and verify functions. Normally
they should not be called from application programs.
However, they can also be called directly to implement
padding for other asymmetric ciphers.
RSA_padding_add_PKCS1_OAEP() and
RSA_padding_check_PKCS1_OAEP() may be used in an
application combined with RSA_NO_PADDING in order to
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RSA_padding_add_PKCS1_type_1(OpenSRSA_padding_add_PKCS1_type_1(3)
implement OAEP with an encoding parameter.
RSA_padding_add_xxx() encodes fl bytes from f so as to fit
into tlen bytes and stores the result at to. An error
occurs if fl does not meet the size requirements of the
encoding method.
The following encoding methods are implemented:
PKCS1_type_1
PKCS #1 v2.0 EMSA-PKCS1-v1_5 (PKCS #1 v1.5 block type
1); used for signatures
PKCS1_type_2
PKCS #1 v2.0 EME-PKCS1-v1_5 (PKCS #1 v1.5 block type
2)
PKCS1_OAEP
PKCS #1 v2.0 EME-OAEP
SSLv23
PKCS #1 EME-PKCS1-v1_5 with SSL-specific modification
none
simply copy the data
The random number generator must be seeded prior to
calling RSA_padding_add_xxx().
RSA_padding_check_xxx() verifies that the fl bytes at f
contain a valid encoding for a rsa_len byte RSA key in the
respective encoding method and stores the recovered data
of at most tlen bytes (for RSA_NO_PADDING: of size tlen)
at to.
For RSA_padding_xxx_OAEP(), p points to the encoding
parameter of length pl. p may be NULL if pl is 0.
RETURN VALUES
The RSA_padding_add_xxx() functions return 1 on success, 0
on error. The RSA_padding_check_xxx() functions return
the length of the recovered data, -1 on error. Error codes
can be obtained by calling ERR_get_error(3).
SEE ALSORSA_public_encrypt(3), RSA_private_decrypt(3),
RSA_sign(3), RSA_verify(3)HISTORYRSA_padding_add_PKCS1_type_1(),
RSA_padding_check_PKCS1_type_1(),
RSA_padding_add_PKCS1_type_2(),
RSA_padding_check_PKCS1_type_2(),
RSA_padding_add_SSLv23(), RSA_padding_check_SSLv23(),
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RSA_padding_add_PKCS1_type_1(OpenSRSA_padding_add_PKCS1_type_1(3)RSA_padding_add_none() and RSA_padding_check_none()
appeared in SSLeay 0.9.0.
RSA_padding_add_PKCS1_OAEP() and
RSA_padding_check_PKCS1_OAEP() were added in OpenSSL
0.9.2b.
RSA_padding_add_PKCS1_type_2,
RSA_padding_check_PKCS1_type_2,
RSA_padding_add_PKCS1_OAEP, RSA_padding_check_PKCS1_OAEP,
RSA_padding_add_SSLv23, RSA_padding_check_SSLv23,
RSA_padding_add_none, RSA_padding_check_none - asymmetric
encryption padding"
16/Aug/2000 0.9.6 3
