githubmirror/xmlsec

src/openssl/digests.c
761 строка27 KB
lsh123
Update file headers for doxygen, use common copyright header, bump copyright to 2026 (#1122)
07 апр 2026, 04:13
07 апр 2026, 04:132e557ee
/**
 * XML Security Library (http://www.aleksey.com/xmlsec).
 *
 * This is free software; see the Copyright file in the source distribution for precise wording.
 *
 * Copyright (C) 2002-2026 Aleksey Sanin <aleksey@aleksey.com>. All Rights Reserved.
 */
/**
 * @addtogroup xmlsec_openssl_crypto
 * @brief Digests transforms implementation for OpenSSL.
 */
#include "globals.h"

#include <string.h>

#include <openssl/evp.h>

#include <xmlsec/xmlsec.h>
#include <xmlsec/keys.h>
#include <xmlsec/transforms.h>
#include <xmlsec/errors.h>

#include <xmlsec/openssl/crypto.h>
#include <xmlsec/openssl/evp.h>
#include "openssl_compat.h"

#ifdef XMLSEC_OPENSSL_API_300
#include <openssl/core_names.h>
#endif /* XMLSEC_OPENSSL_API_300 */

#include "../cast_helpers.h"

/******************************************************************************
 *
 * Internal OpenSSL EVP Digest CTX
 *
  *****************************************************************************/
typedef struct _xmlSecOpenSSLEvpDigestCtx xmlSecOpenSSLEvpDigestCtx, *xmlSecOpenSSLEvpDigestCtxPtr;
struct _xmlSecOpenSSLEvpDigestCtx {
    EVP_MD*             digest;
    int                 digestNeedsToBeFreed;
    EVP_MD_CTX*         digestCtx;
    xmlSecByte          dgst[EVP_MAX_MD_SIZE];
    xmlSecSize          dgstSize;       /* dgst size in bytes */
};

/******************************************************************************
 *
 * EVP Digest transforms
 *
  *****************************************************************************/
XMLSEC_TRANSFORM_DECLARE(OpenSSLEvpDigest, xmlSecOpenSSLEvpDigestCtx)
#define xmlSecOpenSSLEvpDigestSize XMLSEC_TRANSFORM_SIZE(OpenSSLEvpDigest)

static int      xmlSecOpenSSLEvpDigestInitialize        (xmlSecTransformPtr transform);
static void     xmlSecOpenSSLEvpDigestFinalize          (xmlSecTransformPtr transform);
static int      xmlSecOpenSSLEvpDigestVerify            (xmlSecTransformPtr transform,
                                                         const xmlSecByte* data,
                                                         xmlSecSize dataSize,
                                                         xmlSecTransformCtxPtr transformCtx);
static int      xmlSecOpenSSLEvpDigestExecute           (xmlSecTransformPtr transform,
                                                         int last,
                                                         xmlSecTransformCtxPtr transformCtx);
static int      xmlSecOpenSSLEvpDigestCheckId           (xmlSecTransformPtr transform);

static int
xmlSecOpenSSLEvpDigestCheckId(xmlSecTransformPtr transform) {

#ifndef XMLSEC_NO_MD5
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformMd5Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_MD5 */

#ifndef XMLSEC_NO_RIPEMD160
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformRipemd160Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_RIPEMD160 */

#ifndef XMLSEC_NO_SHA1
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha1Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_SHA1 */

#ifndef XMLSEC_NO_SHA224
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha224Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_SHA224 */

#ifndef XMLSEC_NO_SHA256
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha256Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_SHA256 */

#ifndef XMLSEC_NO_SHA384
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha384Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_SHA384 */

#ifndef XMLSEC_NO_SHA512
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha512Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_SHA512 */

#ifndef XMLSEC_NO_SHA3
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha3_224Id)) {
        return(1);
    } else
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha3_256Id)) {
        return(1);
    } else
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha3_384Id)) {
        return(1);
    } else
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha3_512Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_SHA3 */

#ifndef XMLSEC_NO_GOST
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformGostR3411_94Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_GOST */

#ifndef XMLSEC_NO_GOST2012
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformGostR3411_2012_256Id)) {
        return(1);
    } else

    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformGostR3411_2012_512Id)) {
        return(1);
    } else
#endif /* XMLSEC_NO_GOST2012 */

    {
        return(0);
    }
}

/* small helper macro to reduce clutter in the code */
#ifndef XMLSEC_OPENSSL_API_300
#define XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, digestVal, digestName) \
    (ctx)->digest = (EVP_MD*)(digestVal);

#else /* XMLSEC_OPENSSL_API_300 */

static int
xmlSecOpenSSLEvpDigestSetDigestByName(xmlSecOpenSSLEvpDigestCtxPtr ctx, const char * digestName) {
    xmlSecAssert2(ctx != NULL, -1);
    xmlSecAssert2(ctx->digest == NULL, -1);
    xmlSecAssert2(digestName != NULL, -1);

    ctx->digest = EVP_MD_fetch(xmlSecOpenSSLGetLibCtx(), digestName, NULL);
    if(ctx->digest == NULL) {
        xmlSecOpenSSLError2("EVP_MD_fetch", NULL, "digestName=%s", xmlSecErrorsSafeString(digestName));
        return(-1);
    }
    ctx->digestNeedsToBeFreed = 1;
    return(0);
}

#define XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, digestVal, digestName) \
    if (xmlSecOpenSSLEvpDigestSetDigestByName((ctx), (digestName)) < 0) {                   \
        xmlSecInternalError2("xmlSecOpenSSLEvpDigestSetDigestByName",                       \
            xmlSecTransformGetName(transform),                                              \
            "digestName=%s", xmlSecErrorsSafeString(digestName));                           \
        xmlSecOpenSSLEvpDigestFinalize(transform);                                          \
        return(-1);                                                                         \
    }


#endif /* XMLSEC_OPENSSL_API_300 */

#if !defined(XMLSEC_NO_GOST) || !defined(XMLSEC_NO_GOST2012)

/* Not all algorithms have been converted to the new providers design (e.g. GOST) */
/* TODO: EVP_get_digestbyname() is deprecated in OpenSSL 3.0. Replace with EVP_MD_fetch()
 * once GOST algorithms become available as OpenSSL providers. */
static int
xmlSecOpenSSLEvpDigestSetGostDigestByName(xmlSecOpenSSLEvpDigestCtxPtr ctx, const char * digestName) {
    xmlSecAssert2(ctx != NULL, -1);
    xmlSecAssert2(ctx->digest == NULL, -1);
    xmlSecAssert2(digestName != NULL, -1);

    ctx->digest = (EVP_MD*)EVP_get_digestbyname(digestName);
    if (ctx->digest == NULL) {
        xmlSecOpenSSLError2("EVP_get_digestbyname", NULL, "digestName=%s", xmlSecErrorsSafeString(digestName));
        return(-1);
    }
    return(0);
}

#define XMLSEC_OPENSSL_EVP_DIGEST_SETUP_GOST(transform, ctx, digestName)                \
    if (xmlSecOpenSSLEvpDigestSetGostDigestByName((ctx), (digestName)) < 0) {           \
        xmlSecInternalError2("xmlSecOpenSSLEvpDigestSetGostDigestByName",               \
            xmlSecTransformGetName(transform),                                          \
            "digestName=%s", xmlSecErrorsSafeString(digestName));                       \
        xmlSecOpenSSLEvpDigestFinalize(transform);                                      \
        return(-1);                                                                     \
    }
#endif /*  !defined(XMLSEC_NO_GOST) || !defined(XMLSEC_NO_GOST2012) */


static int
xmlSecOpenSSLEvpDigestInitialize(xmlSecTransformPtr transform) {
    xmlSecOpenSSLEvpDigestCtxPtr ctx;

    xmlSecAssert2(xmlSecOpenSSLEvpDigestCheckId(transform), -1);
    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecOpenSSLEvpDigestSize), -1);

    ctx = xmlSecOpenSSLEvpDigestGetCtx(transform);
    xmlSecAssert2(ctx != NULL, -1);

    /* initialize context */
    memset(ctx, 0, sizeof(xmlSecOpenSSLEvpDigestCtx));

#ifndef XMLSEC_NO_MD5
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformMd5Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_md5(), OSSL_DIGEST_NAME_MD5);
    } else
#endif /* XMLSEC_NO_MD5 */

#ifndef XMLSEC_NO_RIPEMD160
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformRipemd160Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_ripemd160(), OSSL_DIGEST_NAME_RIPEMD160);
    } else
#endif /* XMLSEC_NO_RIPEMD160 */

#ifndef XMLSEC_NO_SHA1
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha1Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha1(), OSSL_DIGEST_NAME_SHA1);
    } else
#endif /* XMLSEC_NO_SHA1 */

#ifndef XMLSEC_NO_SHA224
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha224Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha224(), OSSL_DIGEST_NAME_SHA2_224);
    } else
#endif /* XMLSEC_NO_SHA224 */

#ifndef XMLSEC_NO_SHA256
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha256Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha256(), OSSL_DIGEST_NAME_SHA2_256);
    } else
#endif /* XMLSEC_NO_SHA256 */

#ifndef XMLSEC_NO_SHA384
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha384Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha384(), OSSL_DIGEST_NAME_SHA2_384);
    } else
#endif /* XMLSEC_NO_SHA384 */

#ifndef XMLSEC_NO_SHA512
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha512Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha512(), OSSL_DIGEST_NAME_SHA2_512);
    } else
#endif /* XMLSEC_NO_SHA512 */

#ifndef XMLSEC_NO_SHA3
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha3_224Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha3_224(), OSSL_DIGEST_NAME_SHA3_224);
    } else
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha3_256Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha3_256(), OSSL_DIGEST_NAME_SHA3_256);
    } else
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha3_384Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha3_384(), OSSL_DIGEST_NAME_SHA3_384);
    } else
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformSha3_512Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP(transform, ctx, EVP_sha3_512(), OSSL_DIGEST_NAME_SHA3_512);
    } else
#endif /* XMLSEC_NO_SHA3 */

#ifndef XMLSEC_NO_GOST
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformGostR3411_94Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP_GOST(transform, ctx, XMLSEC_OPENSSL_DIGEST_NAME_GOST94);
    } else
#endif /* XMLSEC_NO_GOST */

#ifndef XMLSEC_NO_GOST2012
    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformGostR3411_2012_256Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP_GOST(transform, ctx, XMLSEC_OPENSSL_DIGEST_NAME_GOST12_256);
    } else

    if(xmlSecTransformCheckId(transform, xmlSecOpenSSLTransformGostR3411_2012_512Id)) {
        XMLSEC_OPENSSL_EVP_DIGEST_SETUP_GOST(transform, ctx, XMLSEC_OPENSSL_DIGEST_NAME_GOST12_512);
    } else
#endif /* XMLSEC_NO_GOST2012 */
    {
        xmlSecInvalidTransfromError(transform);
        xmlSecOpenSSLEvpDigestFinalize(transform);
        return(-1);
    }
    xmlSecAssert2(ctx->digest != NULL, -1);

    /* create digest CTX */
    ctx->digestCtx = EVP_MD_CTX_new();
    if(ctx->digestCtx == NULL) {
        xmlSecOpenSSLError("EVP_MD_CTX_new", xmlSecTransformGetName(transform));
        xmlSecOpenSSLEvpDigestFinalize(transform);
        return(-1);
    }

    /* done */
    return(0);
}

static void
xmlSecOpenSSLEvpDigestFinalize(xmlSecTransformPtr transform) {
    xmlSecOpenSSLEvpDigestCtxPtr ctx;

    xmlSecAssert(xmlSecOpenSSLEvpDigestCheckId(transform));
    xmlSecAssert(xmlSecTransformCheckSize(transform, xmlSecOpenSSLEvpDigestSize));

    ctx = xmlSecOpenSSLEvpDigestGetCtx(transform);
    xmlSecAssert(ctx != NULL);

    if(ctx->digestCtx != NULL) {
        EVP_MD_CTX_free(ctx->digestCtx);
    }

#ifdef XMLSEC_OPENSSL_API_300
    if((ctx->digest != NULL) && (ctx->digestNeedsToBeFreed != 0)) {
        EVP_MD_free(ctx->digest);
    }
#endif /* XMLSEC_OPENSSL_API_300 */

    memset(ctx, 0, sizeof(xmlSecOpenSSLEvpDigestCtx));
}

static int
xmlSecOpenSSLEvpDigestVerify(xmlSecTransformPtr transform,
                        const xmlSecByte* data, xmlSecSize dataSize,
                        xmlSecTransformCtxPtr transformCtx) {
    xmlSecOpenSSLEvpDigestCtxPtr ctx;

    xmlSecAssert2(xmlSecOpenSSLEvpDigestCheckId(transform), -1);
    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecOpenSSLEvpDigestSize), -1);
    xmlSecAssert2(transform->operation == xmlSecTransformOperationVerify, -1);
    xmlSecAssert2(transform->status == xmlSecTransformStatusFinished, -1);
    xmlSecAssert2(data != NULL, -1);
    xmlSecAssert2(transformCtx != NULL, -1);

    ctx = xmlSecOpenSSLEvpDigestGetCtx(transform);
    xmlSecAssert2(ctx != NULL, -1);
    xmlSecAssert2(ctx->dgstSize > 0, -1);

    if(dataSize != ctx->dgstSize) {
        xmlSecInvalidSizeError("Digest", dataSize, ctx->dgstSize,
                               xmlSecTransformGetName(transform));
        transform->status = xmlSecTransformStatusFail;
        return(0);
    }

    if(memcmp(ctx->dgst, data, ctx->dgstSize) != 0) {
        xmlSecInvalidDataError("data and digest do not match",
                xmlSecTransformGetName(transform));
        transform->status = xmlSecTransformStatusFail;
        return(0);
    }

    transform->status = xmlSecTransformStatusOk;
    return(0);
}

static int
xmlSecOpenSSLEvpDigestExecute(xmlSecTransformPtr transform, int last, xmlSecTransformCtxPtr transformCtx) {
    xmlSecOpenSSLEvpDigestCtxPtr ctx;
    xmlSecBufferPtr in, out;
    int ret;

    xmlSecAssert2(xmlSecOpenSSLEvpDigestCheckId(transform), -1);
    xmlSecAssert2((transform->operation == xmlSecTransformOperationSign) || (transform->operation == xmlSecTransformOperationVerify), -1);
    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecOpenSSLEvpDigestSize), -1);
    xmlSecAssert2(transformCtx != NULL, -1);

    in = &(transform->inBuf);
    xmlSecAssert2(in != NULL, -1);

    out = &(transform->outBuf);
    xmlSecAssert2(out != NULL, -1);

    ctx = xmlSecOpenSSLEvpDigestGetCtx(transform);
    xmlSecAssert2(ctx != NULL, -1);
    xmlSecAssert2(ctx->digest != NULL, -1);
    xmlSecAssert2(ctx->digestCtx != NULL, -1);

    if(transform->status == xmlSecTransformStatusNone) {
        ret = EVP_DigestInit(ctx->digestCtx, ctx->digest);
        if(ret != 1) {
            xmlSecOpenSSLError("EVP_DigestInit",
                               xmlSecTransformGetName(transform));
            return(-1);
        }
        transform->status = xmlSecTransformStatusWorking;
    }

    if(transform->status == xmlSecTransformStatusWorking) {
        xmlSecSize inSize;

        inSize = xmlSecBufferGetSize(in);
        if(inSize > 0) {
            ret = EVP_DigestUpdate(ctx->digestCtx, xmlSecBufferGetData(in), inSize);
            if(ret != 1) {
                xmlSecOpenSSLError2("EVP_DigestUpdate",
                                    xmlSecTransformGetName(transform),
                                    "size=" XMLSEC_SIZE_FMT, inSize);
                return(-1);
            }

            ret = xmlSecBufferRemoveHead(in, inSize);
            if(ret < 0) {
                xmlSecInternalError2("xmlSecBufferRemoveHead",
                                     xmlSecTransformGetName(transform),
                                     "size=" XMLSEC_SIZE_FMT, inSize);
                return(-1);
            }
        }
        if(last) {
            xmlSecOpenSSLSizeT mdSize;
            xmlSecSize size;
            unsigned int dgstSize;

            mdSize = EVP_MD_size(ctx->digest);
            if (mdSize <= 0) {
                xmlSecOpenSSLError("EVP_MD_size", xmlSecTransformGetName(transform));
                return(-1);
            }
            XMLSEC_OPENSSL_SAFE_CAST_SIZE_T_TO_SIZE(mdSize, size, return(-1), xmlSecTransformGetName(transform));
            xmlSecAssert2(size <= sizeof(ctx->dgst), -1);

            ret = EVP_DigestFinal(ctx->digestCtx, ctx->dgst, &dgstSize);
            if(ret != 1) {
                xmlSecOpenSSLError("EVP_DigestFinal",
                                   xmlSecTransformGetName(transform));
                return(-1);
            }
            xmlSecAssert2(dgstSize > 0, -1);
            ctx->dgstSize = dgstSize;

            /* copy result to output */
            if(transform->operation == xmlSecTransformOperationSign) {
                ret = xmlSecBufferAppend(out, ctx->dgst, ctx->dgstSize);
                if(ret < 0) {
                    xmlSecInternalError2("xmlSecBufferAppend",
                        xmlSecTransformGetName(transform),
                        "size=" XMLSEC_SIZE_FMT, ctx->dgstSize);
                    return(-1);
                }
            }
            transform->status = xmlSecTransformStatusFinished;
        }
    } else if(transform->status == xmlSecTransformStatusFinished) {
        /* the only way we can get here is if there is no input */
        xmlSecAssert2(xmlSecBufferGetSize(in) == 0, -1);
    } else {
        xmlSecInvalidTransfromStatusError(transform);
        return(-1);
    }

    return(0);
}


/* Helper macros to define the digest transform klass */
#define XMLSEC_OPENSSL_EVP_DIGEST_KLASS_EX(name, readNode)                                              \
static xmlSecTransformKlass xmlSecOpenSSL ## name ## Klass = {                                          \
    sizeof(xmlSecTransformKlass),               /* xmlSecSize klassSize */                              \
    xmlSecOpenSSLEvpDigestSize,                 /* xmlSecSize objSize */                                \
    xmlSecName ## name,                         /* const xmlChar* name; */                              \
    xmlSecHref ## name,                         /* const xmlChar* href; */                              \
    xmlSecTransformUsageDigestMethod,           /* xmlSecTransformUsage usage; */                       \
    xmlSecOpenSSLEvpDigestInitialize,           /* xmlSecTransformInitializeMethod initialize; */       \
    xmlSecOpenSSLEvpDigestFinalize,             /* xmlSecTransformFinalizeMethod finalize; */           \
    readNode,                                   /* xmlSecTransformNodeReadMethod readNode; */           \
    NULL,                                       /* xmlSecTransformNodeWriteMethod writeNode; */         \
    NULL,                                       /* xmlSecTransformSetKeyReqMethod setKeyReq; */         \
    NULL,                                       /* xmlSecTransformSetKeyMethod setKey; */               \
    xmlSecOpenSSLEvpDigestVerify,               /* xmlSecTransformVerifyMethod verify; */               \
    xmlSecTransformDefaultGetDataType,          /* xmlSecTransformGetDataTypeMethod getDataType; */     \
    xmlSecTransformDefaultPushBin,              /* xmlSecTransformPushBinMethod pushBin; */             \
    xmlSecTransformDefaultPopBin,               /* xmlSecTransformPopBinMethod popBin; */               \
    NULL,                                       /* xmlSecTransformPushXmlMethod pushXml; */             \
    NULL,                                       /* xmlSecTransformPopXmlMethod popXml; */               \
    xmlSecOpenSSLEvpDigestExecute,              /* xmlSecTransformExecuteMethod execute; */             \
    NULL,                                       /* void* reserved0; */                                  \
    NULL,                                       /* void* reserved1; */                                  \
};

#define XMLSEC_OPENSSL_EVP_DIGEST_KLASS(name)                                                           \
    XMLSEC_OPENSSL_EVP_DIGEST_KLASS_EX(name, NULL)


#ifndef XMLSEC_NO_MD5
/******************************************************************************
 *
 * MD5
 *
  *****************************************************************************/
/* MD5 digest transform: xmlSecOpenSSLMd5Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Md5)

/**
 * @brief MD5 digest transform klass.
 * @return pointer to MD5 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformMd5GetKlass(void) {
    return(&xmlSecOpenSSLMd5Klass);
}
#endif /* XMLSEC_NO_MD5 */

#ifndef XMLSEC_NO_RIPEMD160
/******************************************************************************
 *
 * RIPEMD160
 *
  *****************************************************************************/
/* RIPEMD-160 digest transform: xmlSecOpenSSLRipemd160Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Ripemd160)

/**
 * @brief RIPEMD-160 digest transform klass.
 * @return pointer to RIPEMD-160 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformRipemd160GetKlass(void) {
    return(&xmlSecOpenSSLRipemd160Klass);
}
#endif /* XMLSEC_NO_RIPEMD160 */


#ifndef XMLSEC_NO_SHA1
/******************************************************************************
 *
 * SHA1
 *
  *****************************************************************************/
/* SHA-1 digest transform: xmlSecOpenSSLSha1Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha1)

/**
 * @brief SHA-1 digest transform klass.
 * @return pointer to SHA-1 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha1GetKlass(void) {
    return(&xmlSecOpenSSLSha1Klass);
}
#endif /* XMLSEC_NO_SHA1 */

#ifndef XMLSEC_NO_SHA224
/******************************************************************************
 *
 * SHA2-224
 *
  *****************************************************************************/
/* SHA2-224 digest transform: xmlSecOpenSSLSha224Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha224)

/**
 * @brief SHA2-224 digest transform klass.
 * @return pointer to SHA2-224 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha224GetKlass(void) {
    return(&xmlSecOpenSSLSha224Klass);
}
#endif /* XMLSEC_NO_SHA224 */

#ifndef XMLSEC_NO_SHA256
/******************************************************************************
 *
 * SHA2-256
 *
  *****************************************************************************/
/* SHA2-256 digest transform: xmlSecOpenSSLSha256Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha256)

/**
 * @brief SHA2-256 digest transform klass.
 * @return pointer to SHA2-256 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha256GetKlass(void) {
    return(&xmlSecOpenSSLSha256Klass);
}
#endif /* XMLSEC_NO_SHA256 */

#ifndef XMLSEC_NO_SHA384
/******************************************************************************
 *
 * SHA2-384
 *
  *****************************************************************************/
/* SHA2-384 digest transform: xmlSecOpenSSLSha384Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha384)

/**
 * @brief SHA2-384 digest transform klass.
 * @return pointer to SHA2-384 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha384GetKlass(void) {
    return(&xmlSecOpenSSLSha384Klass);
}
#endif /* XMLSEC_NO_SHA384 */

#ifndef XMLSEC_NO_SHA512
/******************************************************************************
 *
 * SHA2-512
 *
  *****************************************************************************/
/* SHA2-512 digest transform: xmlSecOpenSSLSha512Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha512)

/**
 * @brief SHA2-512 digest transform klass.
 * @return pointer to SHA2-512 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha512GetKlass(void) {
    return(&xmlSecOpenSSLSha512Klass);
}
#endif /* XMLSEC_NO_SHA512 */


#ifndef XMLSEC_NO_SHA3
/******************************************************************************
 *
 * SHA3-224
 *
  *****************************************************************************/
/* SHA3-224 digest transform: xmlSecOpenSSLSha3_224Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha3_224)

/**
 * @brief SHA3-224 digest transform klass.
 * @return pointer to SHA3-224 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha3_224GetKlass(void) {
    return(&xmlSecOpenSSLSha3_224Klass);
}

/******************************************************************************
 *
 * SHA3-256
 *
  *****************************************************************************/
/* SHA3-256 digest transform: xmlSecOpenSSLSha3_256Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha3_256)

/**
 * @brief SHA3-256 digest transform klass.
 * @return pointer to SHA3-256 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha3_256GetKlass(void) {
    return(&xmlSecOpenSSLSha3_256Klass);
}

/******************************************************************************
 *
 * SHA3-384
 *
  *****************************************************************************/
/* SHA3-384 digest transform: xmlSecOpenSSLSha3_384Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha3_384)

/**
 * @brief SHA3-384 digest transform klass.
 * @return pointer to SHA3-384 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha3_384GetKlass(void) {
    return(&xmlSecOpenSSLSha3_384Klass);
}

/******************************************************************************
 *
 * SHA3-512
 *
  *****************************************************************************/
/* SHA3-512 digest transform: xmlSecOpenSSLSha3_512Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(Sha3_512)

/**
 * @brief SHA3-512 digest transform klass.
 * @return pointer to SHA3-512 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformSha3_512GetKlass(void) {
    return(&xmlSecOpenSSLSha3_512Klass);
}
#endif /* XMLSEC_NO_SHA3 */

#ifndef XMLSEC_NO_GOST
/******************************************************************************
 *
 * GOSTR3411_94
 *
  *****************************************************************************/
/* GOSTR3411-94 digest transform: xmlSecOpenSSLGostR3411_94Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(GostR3411_94)

/**
 * @brief GOSTR3411_94 digest transform klass.
 * @return pointer to GOSTR3411_94 digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformGostR3411_94GetKlass(void) {
    return(&xmlSecOpenSSLGostR3411_94Klass);
}
#endif /* XMLSEC_NO_GOST*/

#ifndef XMLSEC_NO_GOST2012

/******************************************************************************
 *
 * GOST R 34.11-2012 256 bit
 *
  *****************************************************************************/
/* GOST R 34.11-2012 256 bit digest transform: xmlSecOpenSSLGostR3411_2012_256Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(GostR3411_2012_256)

/**
 * @brief GOST R 34.11-2012 256 bit digest transform klass.
 * @return pointer to GOST R 34.11-2012 256 bit digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformGostR3411_2012_256GetKlass(void) {
    return(&xmlSecOpenSSLGostR3411_2012_256Klass);
}

/******************************************************************************
 *
 * GOST R 34.11-2012 512 bit
 *
  *****************************************************************************/
/* GOST R 34.11-2012 512 bit digest transform: xmlSecOpenSSLGostR3411_2012_512Klass */
XMLSEC_OPENSSL_EVP_DIGEST_KLASS(GostR3411_2012_512)

/**
 * @brief GOST R 34.11-2012 512 bit digest transform klass.
 * @return pointer to GOST R 34.11-2012 512 bit digest transform klass.
 */
xmlSecTransformId
xmlSecOpenSSLTransformGostR3411_2012_512GetKlass(void) {
    return(&xmlSecOpenSSLGostR3411_2012_512Klass);
}

#endif /* XMLSEC_NO_GOST2012 */