RSA_SIGN - Online Linux Manual PageSection : 3ossl
Updated : 2022-03-15
Source : 3.0.2
Note : OpenSSL
NAMERSA_sign, RSA_verify − RSA signatures
SYNOPSIS #include <openssl/rsa.h>
The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros (7): int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
unsigned char *sigret, unsigned int *siglen, RSA *rsa);
int RSA_verify(int type, const unsigned char *m, unsigned int m_len,
unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
DESCRIPTIONAll of the functions described on this page are deprecated. Applications should instead use EVP_PKEY_sign_init (3), EVP_PKEY_sign (3), EVP_PKEY_verify_init (3) and EVP_PKEY_verify (3). RSA_sign() signs the message digest m of size m_len using the private key rsa using RSASSA−PKCS1−v1_5 as specified in RFC 3447. It stores the signature in sigret and the signature size in siglen. sigret must point to RSA_size(rsa) bytes of memory. Note that PKCS #1 adds meta-data, placing limits on the size of the key that can be used. See RSA_private_encrypt (3) for lower-level operations. type denotes the message digest algorithm that was used to generate m. If type is NID_md5_sha1, an SSL signature (MD5 and SHA1 message digests with PKCS #1 padding and no algorithm identifier) is created. RSA_verify() verifies that the signature sigbuf of size siglen matches a given message digest m of size m_len. type denotes the message digest algorithm that was used to generate the signature. rsa is the signer's public key.
RETURN VALUESRSA_sign() returns 1 on success. RSA_verify() returns 1 on successful verification. The error codes can be obtained by ERR_get_error (3).
CONFORMING TOSSL, PKCS #1 v2.0
SEE ALSOERR_get_error (3), RSA_private_encrypt (3), RSA_public_decrypt (3)
HISTORYAll of these functions were deprecated in OpenSSL 3.0.
COPYRIGHTCopyright 2000−2021 The OpenSSL Project Authors. All Rights Reserved. Licensed under the Apache License 2.0 (the ‟License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 0
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