1 .\" $OpenBSD: RSA_padding_add_PKCS1_type_1.3,v 1.4 2016/12/11 12:21:48 schwarze Exp $
2 .\" OpenSSL 99d63d46 Oct 26 13:56:48 2016 -0400
4 .\" This file was written by Ulf Moeller <ulf@openssl.org>.
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51 .Dd $Mdocdate: December 11 2016 $
52 .Dt RSA_PADDING_ADD_PKCS1_TYPE_1 3
55 .Nm RSA_padding_add_PKCS1_type_1 ,
56 .Nm RSA_padding_check_PKCS1_type_1 ,
57 .Nm RSA_padding_add_PKCS1_type_2 ,
58 .Nm RSA_padding_check_PKCS1_type_2 ,
59 .Nm RSA_padding_add_PKCS1_OAEP ,
60 .Nm RSA_padding_check_PKCS1_OAEP ,
61 .Nm RSA_padding_add_SSLv23 ,
62 .Nm RSA_padding_check_SSLv23 ,
63 .Nm RSA_padding_add_none ,
64 .Nm RSA_padding_check_none
65 .Nd asymmetric encryption padding
69 .Fo RSA_padding_add_PKCS1_type_1
70 .Fa "unsigned char *to"
72 .Fa "unsigned char *f"
76 .Fo RSA_padding_check_PKCS1_type_1
77 .Fa "unsigned char *to"
79 .Fa "unsigned char *f"
84 .Fo RSA_padding_add_PKCS1_type_2
85 .Fa "unsigned char *to"
87 .Fa "unsigned char *f"
91 .Fo RSA_padding_check_PKCS1_type_2
92 .Fa "unsigned char *to"
94 .Fa "unsigned char *f"
99 .Fo RSA_padding_add_PKCS1_OAEP
100 .Fa "unsigned char *to"
102 .Fa "unsigned char *f"
104 .Fa "unsigned char *p"
108 .Fo RSA_padding_check_PKCS1_OAEP
109 .Fa "unsigned char *to"
111 .Fa "unsigned char *f"
114 .Fa "unsigned char *p"
118 .Fo RSA_padding_add_SSLv23
119 .Fa "unsigned char *to"
121 .Fa "unsigned char *f"
125 .Fo RSA_padding_check_SSLv23
126 .Fa "unsigned char *to"
128 .Fa "unsigned char *f"
133 .Fo RSA_padding_add_none
134 .Fa "unsigned char *to"
136 .Fa "unsigned char *f"
140 .Fo RSA_padding_check_none
141 .Fa "unsigned char *to"
143 .Fa "unsigned char *f"
148 These functions are called from the RSA encrypt, decrypt, sign, and
150 Normally they should not be called from application programs.
152 However, they can also be called directly to implement padding for other
154 .Fn RSA_padding_add_PKCS1_OAEP
156 .Fn RSA_padding_check_PKCS1_OAEP
157 may be used in an application combined with
159 in order to implement OAEP with an encoding parameter.
161 .Fn RSA_padding_add_*
168 bytes and stores the result at
172 does not meet the size requirements of the encoding method.
174 The following encoding methods are implemented:
176 .Bl -tag -width PKCS1_type_2 -compact
178 PKCS #1 v2.0 EMSA-PKCS1-v1_5 (PKCS #1 v1.5 block type 1);
181 PKCS #1 v2.0 EME-PKCS1-v1_5 (PKCS #1 v1.5 block type 2)
183 PKCS #1 v2.0 EME-OAEP
185 PKCS #1 EME-PKCS1-v1_5 with SSL-specific modification
190 .Fn RSA_padding_check_*
195 contain a valid encoding for a
197 byte RSA key in the respective encoding method and stores the recovered
208 .Fn RSA_padding_*_OAEP ,
210 points to the encoding parameter of length
220 .Fn RSA_padding_add_*
221 functions return 1 on success or 0 on error.
223 .Fn RSA_padding_check_*
224 functions return the length of the recovered data or -1 on error.
225 Error codes can be obtained by calling
226 .Xr ERR_get_error 3 .
229 .Xr RSA_private_decrypt 3 ,
230 .Xr RSA_public_encrypt 3 ,
234 .Fn RSA_padding_add_PKCS1_type_1 ,
235 .Fn RSA_padding_check_PKCS1_type_1 ,
236 .Fn RSA_padding_add_PKCS1_type_2 ,
237 .Fn RSA_padding_check_PKCS1_type_2 ,
238 .Fn RSA_padding_add_SSLv23 ,
239 .Fn RSA_padding_check_SSLv23 ,
240 .Fn RSA_padding_add_none ,
242 .Fn RSA_padding_check_none
243 appeared in SSLeay 0.9.0.
245 .Fn RSA_padding_add_PKCS1_OAEP
247 .Fn RSA_padding_check_PKCS1_OAEP
248 were added in OpenSSL 0.9.2b.