RSA_padding_add_PKCS1_type_1 man page on Oracle

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RSA_padding_add_PKCS1_type_1(3)	    OpenSSL    RSA_padding_add_PKCS1_type_1(3)

       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

	#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);

       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 implement OAEP with an encoding

       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:

	   PKCS #1 v2.0 EMSA-PKCS1-v1_5 (PKCS #1 v1.5 block type 1); used for

	   PKCS #1 v2.0 EME-PKCS1-v1_5 (PKCS #1 v1.5 block type 2)

	   PKCS #1 v2.0 EME-OAEP

	   PKCS #1 EME-PKCS1-v1_5 with SSL-specific modification

	   simply copy the data

       The random number generator must be seeded prior to calling

       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.

       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

       RSA_public_encrypt(3), RSA_private_decrypt(3), RSA_sign(3),

       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_SSLv23(), RSA_padding_check_SSLv23(),
       RSA_padding_add_none() and RSA_padding_check_none() appeared in SSLeay

       RSA_padding_add_PKCS1_OAEP() and RSA_padding_check_PKCS1_OAEP() were
       added in OpenSSL 0.9.2b.

1.0.1e				  2013-02-11   RSA_padding_add_PKCS1_type_1(3)

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