263 lines
11 KiB
Plaintext
263 lines
11 KiB
Plaintext
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.\" ========================================================================
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.\"
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.IX Title "EVP_RAND-TEST-RAND 7ossl"
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.TH EVP_RAND-TEST-RAND 7ossl "2024-01-30" "3.2.1" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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EVP_RAND\-TEST\-RAND \- The test EVP_RAND implementation
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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Support for a test generator through the \fB\s-1EVP_RAND\s0\fR \s-1API.\s0 This generator is
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for test purposes only, it does not generate random numbers.
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.SS "Identity"
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.IX Subsection "Identity"
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\&\*(L"TEST-RAND\*(R" is the name for this implementation; it can be used with the
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\&\fIEVP_RAND_fetch()\fR function.
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.SS "Supported parameters"
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.IX Subsection "Supported parameters"
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The supported parameters are:
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.ie n .IP """state"" (\fB\s-1OSSL_RAND_PARAM_STATE\s0\fR) <integer>" 4
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.el .IP "``state'' (\fB\s-1OSSL_RAND_PARAM_STATE\s0\fR) <integer>" 4
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.IX Item "state (OSSL_RAND_PARAM_STATE) <integer>"
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These parameter works as described in \*(L"\s-1PARAMETERS\*(R"\s0 in \s-1\fIEVP_RAND\s0\fR\|(3).
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.ie n .IP """strength"" (\fB\s-1OSSL_RAND_PARAM_STRENGTH\s0\fR) <unsigned integer>" 4
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.el .IP "``strength'' (\fB\s-1OSSL_RAND_PARAM_STRENGTH\s0\fR) <unsigned integer>" 4
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.IX Item "strength (OSSL_RAND_PARAM_STRENGTH) <unsigned integer>"
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.PD 0
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.ie n .IP """reseed_requests"" (\fB\s-1OSSL_DRBG_PARAM_RESEED_REQUESTS\s0\fR) <unsigned integer>" 4
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.el .IP "``reseed_requests'' (\fB\s-1OSSL_DRBG_PARAM_RESEED_REQUESTS\s0\fR) <unsigned integer>" 4
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.IX Item "reseed_requests (OSSL_DRBG_PARAM_RESEED_REQUESTS) <unsigned integer>"
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.ie n .IP """reseed_time_interval"" (\fB\s-1OSSL_DRBG_PARAM_RESEED_TIME_INTERVAL\s0\fR) <integer>" 4
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.el .IP "``reseed_time_interval'' (\fB\s-1OSSL_DRBG_PARAM_RESEED_TIME_INTERVAL\s0\fR) <integer>" 4
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.IX Item "reseed_time_interval (OSSL_DRBG_PARAM_RESEED_TIME_INTERVAL) <integer>"
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.ie n .IP """max_request"" (\fB\s-1OSSL_DRBG_PARAM_RESEED_REQUESTS\s0\fR) <unsigned integer>" 4
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.el .IP "``max_request'' (\fB\s-1OSSL_DRBG_PARAM_RESEED_REQUESTS\s0\fR) <unsigned integer>" 4
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.IX Item "max_request (OSSL_DRBG_PARAM_RESEED_REQUESTS) <unsigned integer>"
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.ie n .IP """min_entropylen"" (\fB\s-1OSSL_DRBG_PARAM_MIN_ENTROPYLEN\s0\fR) <unsigned integer>" 4
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.el .IP "``min_entropylen'' (\fB\s-1OSSL_DRBG_PARAM_MIN_ENTROPYLEN\s0\fR) <unsigned integer>" 4
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.IX Item "min_entropylen (OSSL_DRBG_PARAM_MIN_ENTROPYLEN) <unsigned integer>"
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.ie n .IP """max_entropylen"" (\fB\s-1OSSL_DRBG_PARAM_MAX_ENTROPYLEN\s0\fR) <unsigned integer>" 4
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.el .IP "``max_entropylen'' (\fB\s-1OSSL_DRBG_PARAM_MAX_ENTROPYLEN\s0\fR) <unsigned integer>" 4
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.IX Item "max_entropylen (OSSL_DRBG_PARAM_MAX_ENTROPYLEN) <unsigned integer>"
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.ie n .IP """min_noncelen"" (\fB\s-1OSSL_DRBG_PARAM_MIN_NONCELEN\s0\fR) <unsigned integer>" 4
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.el .IP "``min_noncelen'' (\fB\s-1OSSL_DRBG_PARAM_MIN_NONCELEN\s0\fR) <unsigned integer>" 4
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.IX Item "min_noncelen (OSSL_DRBG_PARAM_MIN_NONCELEN) <unsigned integer>"
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.ie n .IP """max_noncelen"" (\fB\s-1OSSL_DRBG_PARAM_MAX_NONCELEN\s0\fR) <unsigned integer>" 4
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.el .IP "``max_noncelen'' (\fB\s-1OSSL_DRBG_PARAM_MAX_NONCELEN\s0\fR) <unsigned integer>" 4
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.IX Item "max_noncelen (OSSL_DRBG_PARAM_MAX_NONCELEN) <unsigned integer>"
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.ie n .IP """max_perslen"" (\fB\s-1OSSL_DRBG_PARAM_MAX_PERSLEN\s0\fR) <unsigned integer>" 4
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.el .IP "``max_perslen'' (\fB\s-1OSSL_DRBG_PARAM_MAX_PERSLEN\s0\fR) <unsigned integer>" 4
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.IX Item "max_perslen (OSSL_DRBG_PARAM_MAX_PERSLEN) <unsigned integer>"
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.ie n .IP """max_adinlen"" (\fB\s-1OSSL_DRBG_PARAM_MAX_ADINLEN\s0\fR) <unsigned integer>" 4
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.el .IP "``max_adinlen'' (\fB\s-1OSSL_DRBG_PARAM_MAX_ADINLEN\s0\fR) <unsigned integer>" 4
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.IX Item "max_adinlen (OSSL_DRBG_PARAM_MAX_ADINLEN) <unsigned integer>"
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.ie n .IP """reseed_counter"" (\fB\s-1OSSL_DRBG_PARAM_RESEED_COUNTER\s0\fR) <unsigned integer>" 4
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.el .IP "``reseed_counter'' (\fB\s-1OSSL_DRBG_PARAM_RESEED_COUNTER\s0\fR) <unsigned integer>" 4
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.IX Item "reseed_counter (OSSL_DRBG_PARAM_RESEED_COUNTER) <unsigned integer>"
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.PD
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These parameters work as described in \*(L"\s-1PARAMETERS\*(R"\s0 in \s-1\fIEVP_RAND\s0\fR\|(3), except that
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they can all be set as well as read.
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.ie n .IP """test_entropy"" (\fB\s-1OSSL_RAND_PARAM_TEST_ENTROPY\s0\fR) <octet string>" 4
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.el .IP "``test_entropy'' (\fB\s-1OSSL_RAND_PARAM_TEST_ENTROPY\s0\fR) <octet string>" 4
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.IX Item "test_entropy (OSSL_RAND_PARAM_TEST_ENTROPY) <octet string>"
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Sets the bytes returned when the test generator is sent an entropy request.
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The current position is remembered across generate calls.
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If there are insufficient data present to satisfy a call, an error is returned.
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.ie n .IP """test_nonce"" (\fB\s-1OSSL_RAND_PARAM_TEST_NONCE\s0\fR) <octet string>" 4
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.el .IP "``test_nonce'' (\fB\s-1OSSL_RAND_PARAM_TEST_NONCE\s0\fR) <octet string>" 4
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.IX Item "test_nonce (OSSL_RAND_PARAM_TEST_NONCE) <octet string>"
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Sets the bytes returned when the test generator is sent a nonce request.
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Each nonce request will return all of the bytes.
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.ie n .IP """generate"" (\fB\s-1OSSL_RAND_PARAM_GENERATE\s0\fR) <integer>" 4
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.el .IP "``generate'' (\fB\s-1OSSL_RAND_PARAM_GENERATE\s0\fR) <integer>" 4
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.IX Item "generate (OSSL_RAND_PARAM_GENERATE) <integer>"
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If this parameter is zero, it will only emit the nonce and entropy data
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supplied via the aforementioned parameters. Otherwise, low quality
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non-cryptographic pseudorandom output is produced. This parameter defaults
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to zero.
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.SH "NOTES"
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.IX Header "NOTES"
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A context for a test generator can be obtained by calling:
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.PP
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.Vb 2
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\& EVP_RAND *rand = EVP_RAND_fetch(NULL, "TEST\-RAND", NULL);
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\& EVP_RAND_CTX *rctx = EVP_RAND_CTX_new(rand, NULL);
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.Ve
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.SH "EXAMPLES"
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.IX Header "EXAMPLES"
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.Vb 7
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\& EVP_RAND *rand;
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\& EVP_RAND_CTX *rctx;
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\& unsigned char bytes[100];
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\& OSSL_PARAM params[4], *p = params;
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\& unsigned char entropy[1000] = { ... };
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\& unsigned char nonce[20] = { ... };
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\& unsigned int strength = 48;
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\&
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\& rand = EVP_RAND_fetch(NULL, "TEST\-RAND", NULL);
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\& rctx = EVP_RAND_CTX_new(rand, NULL);
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\& EVP_RAND_free(rand);
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\&
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\& *p++ = OSSL_PARAM_construct_uint(OSSL_RAND_PARAM_STRENGTH, &strength);
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\& *p++ = OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
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\& entropy, sizeof(entropy));
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\& *p++ = OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_NONCE,
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\& nonce, sizeof(nonce));
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\& *p = OSSL_PARAM_construct_end();
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\& EVP_RAND_instantiate(rctx, strength, 0, NULL, 0, params);
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\&
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\& EVP_RAND_generate(rctx, bytes, sizeof(bytes), strength, 0, NULL, 0);
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\&
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\& EVP_RAND_CTX_free(rctx);
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.Ve
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\s-1\fIEVP_RAND\s0\fR\|(3),
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\&\*(L"\s-1PARAMETERS\*(R"\s0 in \s-1\fIEVP_RAND\s0\fR\|(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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This functionality was added in OpenSSL 3.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2020\-2023 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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