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Add a function to check if context string is supported #2142

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Merged
SWilson4 merged 1 commit into from
May 28, 2025
Merged

Add a function to check if context string is supported #2142

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10 changes: 10 additions & 0 deletions src/sig/sig.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1110,6 +1110,16 @@ OQS_API OQS_STATUS OQS_SIG_verify_with_ctx_str(const OQS_SIG *sig, const uint8_t
}
}

OQS_API bool OQS_SIG_supports_ctx_str(const char *alg_name) {
OQS_SIG *sig = OQS_SIG_new(alg_name);
if (sig == NULL) {
return false;
}
bool result = sig->sig_with_ctx_support;
OQS_SIG_free(sig);
return result;
}

OQS_API void OQS_SIG_free(OQS_SIG *sig) {
OQS_MEM_insecure_free(sig);
}
8 changes: 8 additions & 0 deletions src/sig/sig.h
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Original file line number Diff line number Diff line change
Expand Up @@ -412,6 +412,14 @@ OQS_API OQS_STATUS OQS_SIG_verify_with_ctx_str(const OQS_SIG *sig, const uint8_t
*/
OQS_API void OQS_SIG_free(OQS_SIG *sig);

/**
* Indicates whether the specified signature algorithm supports signing with a context string.
*
* @param[in] alg_name Name of the desired algorithm; one of the names in `OQS_SIG_algs`.
* @return true if the algorithm supports context string signing, false otherwise.
*/
OQS_API bool OQS_SIG_supports_ctx_str(const char *alg_name);

///// OQS_COPY_FROM_UPSTREAM_FRAGMENT_INCLUDE_START
#ifdef OQS_ENABLE_SIG_DILITHIUM
#include <oqs/sig_dilithium.h>
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