1RSA_SIGN(3ossl)                     OpenSSL                    RSA_SIGN(3ossl)
2
3
4

NAME

6       RSA_sign, RSA_verify - RSA signatures
7

SYNOPSIS

9        #include <openssl/rsa.h>
10
11       The following functions have been deprecated since OpenSSL 3.0, and can
12       be hidden entirely by defining OPENSSL_API_COMPAT with a suitable
13       version value, see openssl_user_macros(7):
14
15        int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
16                     unsigned char *sigret, unsigned int *siglen, RSA *rsa);
17
18        int RSA_verify(int type, const unsigned char *m, unsigned int m_len,
19                       unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
20

DESCRIPTION

22       All of the functions described on this page are deprecated.
23       Applications should instead use EVP_PKEY_sign_init(3),
24       EVP_PKEY_sign(3), EVP_PKEY_verify_init(3) and EVP_PKEY_verify(3).
25
26       RSA_sign() signs the message digest m of size m_len using the private
27       key rsa using RSASSA-PKCS1-v1_5 as specified in RFC 3447. It stores the
28       signature in sigret and the signature size in siglen.  sigret must
29       point to RSA_size(rsa) bytes of memory.  Note that PKCS #1 adds meta-
30       data, placing limits on the size of the key that can be used.  See
31       RSA_private_encrypt(3) for lower-level operations.
32
33       type denotes the message digest algorithm that was used to generate m.
34       If type is NID_md5_sha1, an SSL signature (MD5 and SHA1 message digests
35       with PKCS #1 padding and no algorithm identifier) is created.
36
37       RSA_verify() verifies that the signature sigbuf of size siglen matches
38       a given message digest m of size m_len. type denotes the message digest
39       algorithm that was used to generate the signature.  rsa is the signer's
40       public key.
41

RETURN VALUES

43       RSA_sign() returns 1 on success and 0 for failure.  RSA_verify()
44       returns 1 on successful verification and 0 for failure.
45
46       The error codes can be obtained by ERR_get_error(3).
47

CONFORMING TO

49       SSL, PKCS #1 v2.0
50

SEE ALSO

52       ERR_get_error(3), RSA_private_encrypt(3), RSA_public_decrypt(3)
53

HISTORY

55       All of these functions were deprecated in OpenSSL 3.0.
56
58       Copyright 2000-2022 The OpenSSL Project Authors. All Rights Reserved.
59
60       Licensed under the Apache License 2.0 (the "License").  You may not use
61       this file except in compliance with the License.  You can obtain a copy
62       in the file LICENSE in the source distribution or at
63       <https://www.openssl.org/source/license.html>.
64
65
66
673.1.1                             2023-08-31                   RSA_SIGN(3ossl)
Impressum