From 37c1faa3c80e6f7fa324062bcc4477b83a44a0a6 Mon Sep 17 00:00:00 2001
From: Brett Nicholas <7547222+bigbrett@users.noreply.github.com>
Date: Fri, 13 Feb 2026 14:29:59 -0700
Subject: [PATCH] fix macro protection for sp_*_cond_add_* in ARM SP asm to
 prevent unused function warning when used with RSA_LOW_MEM

---
 wolfcrypt/src/sp_arm32.c    | 6 ++++++
 wolfcrypt/src/sp_arm64.c    | 6 ++++++
 wolfcrypt/src/sp_armthumb.c | 6 ++++++
 wolfcrypt/src/sp_cortexm.c  | 6 ++++++
 4 files changed, 24 insertions(+)

diff --git a/wolfcrypt/src/sp_arm32.c b/wolfcrypt/src/sp_arm32.c
index 9bd9f81e4ba..2a06b5a1164 100644
--- a/wolfcrypt/src/sp_arm32.c
+++ b/wolfcrypt/src/sp_arm32.c
@@ -17706,6 +17706,7 @@ int sp_RsaPublic_2048(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -17911,6 +17912,7 @@ WC_OMIT_FRAME_POINTER static sp_digit sp_2048_cond_add_32(sp_digit* r,
 }
 
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.
@@ -45428,6 +45430,7 @@ int sp_RsaPublic_3072(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -45689,6 +45692,7 @@ WC_OMIT_FRAME_POINTER static sp_digit sp_3072_cond_add_48(sp_digit* r,
 }
 
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.
@@ -61034,6 +61038,7 @@ int sp_RsaPublic_4096(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -61351,6 +61356,7 @@ WC_OMIT_FRAME_POINTER static sp_digit sp_4096_cond_add_64(sp_digit* r,
 }
 
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.
diff --git a/wolfcrypt/src/sp_arm64.c b/wolfcrypt/src/sp_arm64.c
index 7bc4e8ab906..697d3793f24 100644
--- a/wolfcrypt/src/sp_arm64.c
+++ b/wolfcrypt/src/sp_arm64.c
@@ -6140,6 +6140,7 @@ int sp_RsaPublic_2048(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -6175,6 +6176,7 @@ static sp_digit sp_2048_cond_add_16(sp_digit* r, const sp_digit* a, const sp_dig
     return c;
 }
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 
 /* RSA private key operation.
  *
@@ -15515,6 +15517,7 @@ int sp_RsaPublic_3072(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -15550,6 +15553,7 @@ static sp_digit sp_3072_cond_add_24(sp_digit* r, const sp_digit* a, const sp_dig
     return c;
 }
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 
 /* RSA private key operation.
  *
@@ -20524,6 +20528,7 @@ int sp_RsaPublic_4096(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -20559,6 +20564,7 @@ static sp_digit sp_4096_cond_add_32(sp_digit* r, const sp_digit* a, const sp_dig
     return c;
 }
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 
 /* RSA private key operation.
  *
diff --git a/wolfcrypt/src/sp_armthumb.c b/wolfcrypt/src/sp_armthumb.c
index 872ea8be7eb..c1b8f28e6f3 100644
--- a/wolfcrypt/src/sp_armthumb.c
+++ b/wolfcrypt/src/sp_armthumb.c
@@ -28024,6 +28024,7 @@ int sp_RsaPublic_2048(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
  *
@@ -28093,6 +28094,7 @@ SP_NOINLINE static sp_digit sp_2048_cond_add_32(sp_digit* r, const sp_digit* a,
     return (word32)(size_t)r;
 }
 
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.
@@ -80194,6 +80196,7 @@ int sp_RsaPublic_3072(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
  *
@@ -80263,6 +80266,7 @@ SP_NOINLINE static sp_digit sp_3072_cond_add_48(sp_digit* r, const sp_digit* a,
     return (word32)(size_t)r;
 }
 
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.
@@ -92650,6 +92654,7 @@ int sp_RsaPublic_4096(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
  *
@@ -92724,6 +92729,7 @@ SP_NOINLINE static sp_digit sp_4096_cond_add_64(sp_digit* r, const sp_digit* a,
     return (word32)(size_t)r;
 }
 
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.
diff --git a/wolfcrypt/src/sp_cortexm.c b/wolfcrypt/src/sp_cortexm.c
index ccb70100d94..eac00246229 100644
--- a/wolfcrypt/src/sp_cortexm.c
+++ b/wolfcrypt/src/sp_cortexm.c
@@ -8884,6 +8884,7 @@ int sp_RsaPublic_2048(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -9089,6 +9090,7 @@ WC_OMIT_FRAME_POINTER static sp_digit sp_2048_cond_add_32(sp_digit* r,
 }
 
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.
@@ -21488,6 +21490,7 @@ int sp_RsaPublic_3072(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -21749,6 +21752,7 @@ WC_OMIT_FRAME_POINTER static sp_digit sp_3072_cond_add_48(sp_digit* r,
 }
 
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.
@@ -29835,6 +29839,7 @@ int sp_RsaPublic_4096(const byte* in, word32 inLen, const mp_int* em,
 }
 
 #ifndef WOLFSSL_RSA_PUBLIC_ONLY
+#if !defined(SP_RSA_PRIVATE_EXP_D) && !defined(RSA_LOW_MEM)
 #ifdef WOLFSSL_SP_SMALL
 /* Conditionally add a and b using the mask m.
  * m is -1 to add and 0 when not.
@@ -30152,6 +30157,7 @@ WC_OMIT_FRAME_POINTER static sp_digit sp_4096_cond_add_64(sp_digit* r,
 }
 
 #endif /* WOLFSSL_SP_SMALL */
+#endif /* !SP_RSA_PRIVATE_EXP_D && !RSA_LOW_MEM */
 /* RSA private key operation.
  *
  * in      Array of bytes representing the number to exponentiate, base.