diff options
author | Ulf Möller <ulf@openssl.org> | 2000-01-11 22:35:21 +0000 |
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committer | Ulf Möller <ulf@openssl.org> | 2000-01-11 22:35:21 +0000 |
commit | 2186cd8ef1c4db86109af7a38182c2bd9ddbbb32 (patch) | |
tree | 407efa98f1a4fe9b118651f06c57e85d6d0139e5 /doc/crypto/RSA_padding_add_PKCS1_type_1.pod | |
parent | de73e397f86c578ee514816ca1a312689a89686f (diff) |
Document the RSA library.
Diffstat (limited to 'doc/crypto/RSA_padding_add_PKCS1_type_1.pod')
-rw-r--r-- | doc/crypto/RSA_padding_add_PKCS1_type_1.pod | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/doc/crypto/RSA_padding_add_PKCS1_type_1.pod b/doc/crypto/RSA_padding_add_PKCS1_type_1.pod new file mode 100644 index 0000000000..564ac02091 --- /dev/null +++ b/doc/crypto/RSA_padding_add_PKCS1_type_1.pod @@ -0,0 +1,120 @@ +=pod + +=head1 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 + +=head1 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); + +=head1 DESCRIPTION + +The RSA_padding_xxx_xxx() functions are called from the RSA encrypt, +decrypt, sign and verify functions. + +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 B<RSA_NO_PADDING> in order to implement OAEP with an encoding +parameter. + +RSA_padding_add_xxx() encodes B<fl> bytes from B<f> so as to fit into +B<tlen> bytes and stores the result at B<to>. An error occurs if B<fl> +does not meet the size requirements of the encoding method. + +The following encoding methods are implemented: + +=over 4 + +=item PKCS1_type_1 + +PKCS #1 v2.0 EMSA-PKCS1-v1_5 (PKCS #1 v1.5 block type 1); used for signatures + +=item PKCS1_type_2 + +PKCS #1 v2.0 EME-PKCS1-v1_5 (PKCS #1 v1.5 block type 2) + +=item PKCS1_OAEP + +PKCS #1 EME-OAEP + +=item SSLv23 + +PKCS #1 EME-PKCS1-v1_5 with SSL-specific modification + +=item none + +simply copy the data + +=back + +The random number generator must be seeded prior to calling +RSA_padding_add_xxx(). + +RSA_padding_check_xxx() verifies that the B<fl> bytes at B<f> contain +a valid encoding for a B<rsa_len> byte RSA key in the respective +encoding method and stores the recovered data of at most B<tlen> bytes +at B<to>. + +For RSA_padding_xxx_OAEP(), B<p> points to the encoding parameter +of length B<pl>. B<p> may be B<NULL> if B<pl> is 0. + +=head1 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). + +=head1 SEE ALSO + +RSA_public_encrypt(3), RSA_private_decrypt(3), RSA_sign(3), RSA_verify(3) + +=head1 HISTORY + +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 0.9.0. + +RSA_padding_add_PKCS1_OAEP() and RSA_padding_check_PKCS1_OAEP() were +added in OpenSSL 0.9.2b. + +=cut |