1 .\" $OpenBSD: RSA_sign.3,v 1.4 2016/12/11 12:21:48 schwarze Exp $
2 .\" OpenSSL aa90ca11 Aug 20 15:48:56 2016 -0400
4 .\" This file was written by Ulf Moeller <ulf@openssl.org>.
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22 .\" "This product includes software developed by the OpenSSL Project
23 .\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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52 .Dd $Mdocdate: December 11 2016 $
64 .Fa "const unsigned char *m"
65 .Fa "unsigned int m_len"
66 .Fa "unsigned char *sigret"
67 .Fa "unsigned int *siglen"
73 .Fa "const unsigned char *m"
74 .Fa "unsigned int m_len"
75 .Fa "unsigned char *sigbuf"
76 .Fa "unsigned int siglen"
81 signs the message digest
87 using RSASSA-PKCS1-v1_5 as specified in RFC 3447.
88 It stores the signature in
90 and the signature size in
96 Note that PKCS #1 adds meta-data, placing limits on the size of the key
99 .Xr RSA_private_encrypt 3
100 for lower-level operations.
103 denotes the message digest algorithm that was used to generate
109 an SSL signature (MD5 and SHA1 message digests with PKCS #1 padding and
110 no algorithm identifier) is created.
113 verifies that the signature
117 matches a given message digest
122 denotes the message digest algorithm that was used to generate the
125 is the signer's public key.
128 returns 1 on success.
130 returns 1 on successful verification.
132 The error codes can be obtained by
133 .Xr ERR_get_error 3 .
135 .Xr ERR_get_error 3 ,
137 .Xr RSA_private_encrypt 3 ,
138 .Xr RSA_public_decrypt 3
145 are available in all versions of SSLeay and OpenSSL.