{
    "mode": "man",
    "parameter": "RSA-PSS",
    "section": "7ssl",
    "url": "https://www.chedong.com/phpMan.php/man/RSA-PSS/7ssl/json",
    "generated": "2026-07-05T13:20:34Z",
    "sections": {
        "NAME": {
            "content": "RSA-PSS - EVPPKEY RSA-PSS algorithm support\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "The RSA-PSS EVPPKEY implementation is a restricted version of the RSA algorithm which only\nsupports signing, verification and key generation using PSS padding modes with optional\nparameter restrictions.\n\nIt has associated private key and public key formats.\n\nThis algorithm shares several control operations with the RSA algorithm but with some\nrestrictions described below.\n",
            "subsections": [
                {
                    "name": "Signing and Verification",
                    "content": "Signing and verification is similar to the RSA algorithm except the padding mode is always\nPSS. If the key in use has parameter restrictions then the corresponding signature parameters\nare set to the restrictions: for example, if the key can only be used with digest SHA256,\nMGF1 SHA256 and minimum salt length 32 then the digest, MGF1 digest and salt length will be\nset to SHA256, SHA256 and 32 respectively.\n"
                },
                {
                    "name": "Key Generation",
                    "content": "By default no parameter restrictions are placed on the generated key.\n"
                }
            ]
        },
        "NOTES": {
            "content": "The public key format is documented in RFC4055.\n\nThe PKCS#8 private key format used for RSA-PSS keys is similar to the RSA format except it\nuses the id-RSASSA-PSS OID and the parameters field, if present, restricts the key parameters\nin the same way as the public key.\n",
            "subsections": []
        },
        "CONFORMING TO": {
            "content": "RFC 4055\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "EVPPKEYCTXsetrsapsskeygenmd(3), EVPPKEYCTXsetrsapsskeygenmgf1md(3),\nEVPPKEYCTXsetrsapsskeygensaltlen(3), EVPPKEYCTXnew(3), EVPPKEYCTXctrlstr(3),\nEVPPKEYderive(3)\n",
            "subsections": []
        },
        "COPYRIGHT": {
            "content": "Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.\n\nLicensed under the Apache License 2.0 (the \"License\").  You may not use this file except in\ncompliance with the License.  You can obtain a copy in the file LICENSE in the source\ndistribution or at <https://www.openssl.org/source/license.html>.\n\n\n\n3.0.2                                        2026-06-02                                RSA-PSS(7SSL)",
            "subsections": []
        }
    },
    "summary": "RSA-PSS - EVPPKEY RSA-PSS algorithm support",
    "flags": [],
    "examples": [],
    "see_also": [
        {
            "name": "EVPPKEYCTXsetrsapsskeygenmd",
            "section": "3",
            "url": "https://www.chedong.com/phpMan.php/man/EVPPKEYCTXsetrsapsskeygenmd/3/json"
        },
        {
            "name": "EVPPKEYCTXsetrsapsskeygenmgf1md",
            "section": "3",
            "url": "https://www.chedong.com/phpMan.php/man/EVPPKEYCTXsetrsapsskeygenmgf1md/3/json"
        },
        {
            "name": "EVPPKEYCTXsetrsapsskeygensaltlen",
            "section": "3",
            "url": "https://www.chedong.com/phpMan.php/man/EVPPKEYCTXsetrsapsskeygensaltlen/3/json"
        },
        {
            "name": "EVPPKEYCTXnew",
            "section": "3",
            "url": "https://www.chedong.com/phpMan.php/man/EVPPKEYCTXnew/3/json"
        },
        {
            "name": "EVPPKEYCTXctrlstr",
            "section": "3",
            "url": "https://www.chedong.com/phpMan.php/man/EVPPKEYCTXctrlstr/3/json"
        },
        {
            "name": "EVPPKEYderive",
            "section": "3",
            "url": "https://www.chedong.com/phpMan.php/man/EVPPKEYderive/3/json"
        }
    ]
}