19  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
22  * SPDX-License-Identifier: curl
63 /* When OpenSSL or wolfSSL is available we use their SHA256-functions. */
89 /* Please keep the SSL backend-specific #if branches in this order:
110   ctx->openssl_ctx = EVP_MD_CTX_create();  in my_sha256_init()
111   if(!ctx->openssl_ctx)  in my_sha256_init()
114   if(!EVP_DigestInit_ex(ctx->openssl_ctx, EVP_sha256(), NULL)) {  in my_sha256_init()
115     EVP_MD_CTX_destroy(ctx->openssl_ctx);  in my_sha256_init()
125   EVP_DigestUpdate(ctx->openssl_ctx, data, length);  in my_sha256_update()
130   EVP_DigestFinal_ex(ctx->openssl_ctx, digest, NULL);  in my_sha256_final()
131   EVP_MD_CTX_destroy(ctx->openssl_ctx);  in my_sha256_final()
225   if(!CryptAcquireContext(&ctx->hCryptProv, NULL, NULL, PROV_RSA_AES,  in my_sha256_init()
229   if(!CryptCreateHash(ctx->hCryptProv, CALG_SHA_256, 0, 0, &ctx->hHash)) {  in my_sha256_init()
230     CryptReleaseContext(ctx->hCryptProv, 0);  in my_sha256_init()
231     ctx->hCryptProv = 0;  in my_sha256_init()
242   CryptHashData(ctx->hHash, (unsigned char *) data, length, 0);  in my_sha256_update()
249   CryptGetHashParam(ctx->hHash, HP_HASHVAL, NULL, &length, 0);  in my_sha256_final()
251     CryptGetHashParam(ctx->hHash, HP_HASHVAL, digest, &length, 0);  in my_sha256_final()
253   if(ctx->hHash)  in my_sha256_final()
254     CryptDestroyHash(ctx->hHash);  in my_sha256_final()
256   if(ctx->hCryptProv)  in my_sha256_final()
257     CryptReleaseContext(ctx->hCryptProv, 0);  in my_sha256_final()
336    ((unsigned long)(x) << (unsigned long)(32 - ((y) & 31)))) & 0xFFFFFFFFUL)
346 /* Compress 512-bits */
355     S[i] = md->state[i];  in sha256_compress()
357   /* copy the state into 512-bits into W[0..15] */  in sha256_compress()
362     W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) +  in sha256_compress()
363       W[i - 16];  in sha256_compress()
384     md->state[i] = md->state[i] + S[i];  in sha256_compress()
393   md->curlen = 0;  in my_sha256_init()
394   md->length = 0;  in my_sha256_init()
395   md->state[0] = 0x6A09E667UL;  in my_sha256_init()
396   md->state[1] = 0xBB67AE85UL;  in my_sha256_init()
397   md->state[2] = 0x3C6EF372UL;  in my_sha256_init()
398   md->state[3] = 0xA54FF53AUL;  in my_sha256_init()
399   md->state[4] = 0x510E527FUL;  in my_sha256_init()
400   md->state[5] = 0x9B05688CUL;  in my_sha256_init()
401   md->state[6] = 0x1F83D9ABUL;  in my_sha256_init()
402   md->state[7] = 0x5BE0CD19UL;  in my_sha256_init()
421   if(md->curlen > sizeof(md->buf))  in my_sha256_update()
422     return -1;  in my_sha256_update()
424     if(md->curlen == 0 && inlen >= block_size) {  in my_sha256_update()
426         return -1;  in my_sha256_update()
427       md->length += block_size * 8;  in my_sha256_update()
429       inlen -= block_size;  in my_sha256_update()
432       n = CURLMIN(inlen, (block_size - md->curlen));  in my_sha256_update()
433       memcpy(md->buf + md->curlen, in, n);  in my_sha256_update()
434       md->curlen += n;  in my_sha256_update()
436       inlen -= n;  in my_sha256_update()
437       if(md->curlen == block_size) {  in my_sha256_update()
438         if(sha256_compress(md, md->buf) < 0)  in my_sha256_update()
439           return -1;  in my_sha256_update()
440         md->length += 8 * block_size;  in my_sha256_update()
441         md->curlen = 0;  in my_sha256_update()
460   if(md->curlen >= sizeof(md->buf))  in my_sha256_final()
461     return -1;  in my_sha256_final()
464   md->length += md->curlen * 8;  in my_sha256_final()
467   md->buf[md->curlen++] = (unsigned char)0x80;  in my_sha256_final()
473   if(md->curlen > 56) {  in my_sha256_final()
474     while(md->curlen < 64) {  in my_sha256_final()
475       md->buf[md->curlen++] = (unsigned char)0;  in my_sha256_final()
477     sha256_compress(md, md->buf);  in my_sha256_final()
478     md->curlen = 0;  in my_sha256_final()
482   while(md->curlen < 56) {  in my_sha256_final()
483     md->buf[md->curlen++] = (unsigned char)0;  in my_sha256_final()
487   WPA_PUT_BE64(md->buf + 56, md->length);  in my_sha256_final()
488   sha256_compress(md, md->buf);  in my_sha256_final()
492     WPA_PUT_BE32(out + (4 * i), md->state[i]);  in my_sha256_final()
506  * output [in/out] - The output buffer.
507  * input  [in]     - The input data.
508  * length [in]     - The input length.
545 #endif /* AWS, DIGEST, or libSSH2 */